CN115395812A - Inverter device and vehicle including the same - Google Patents
Inverter device and vehicle including the same Download PDFInfo
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- CN115395812A CN115395812A CN202110570046.7A CN202110570046A CN115395812A CN 115395812 A CN115395812 A CN 115395812A CN 202110570046 A CN202110570046 A CN 202110570046A CN 115395812 A CN115395812 A CN 115395812A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/16—Modifications for eliminating interference voltages or currents
- H03K17/161—Modifications for eliminating interference voltages or currents in field-effect transistor switches
- H03K17/162—Modifications for eliminating interference voltages or currents in field-effect transistor switches without feedback from the output circuit to the control circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0029—Circuits or arrangements for limiting the slope of switching signals, e.g. slew rate
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/5388—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with asymmetrical configuration of switches
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Power Conversion In General (AREA)
Abstract
An inverter device and a vehicle including the same, which easily suppress an off surge voltage or an on surge voltage without complicating a circuit. The inverter device of the invention comprises: an inverter circuit having a first arm having a first switching element and a second arm having a second switching element connected in series with the first switching element; a first drive circuit connected to a gate of the first switching element via a first resistance circuit, for controlling on/off of the first switching element; and a second drive circuit connected to a gate of the second switching element via a second resistance circuit and controlling on/off of the second switching element, wherein a total inductance value on the first bridge side is larger than a total inductance value on the second bridge side, and a total resistance value of a circuit portion of the first resistance circuit that functions when the first switching element is turned off (on) is larger than a total resistance value of a circuit portion of the second resistance circuit that functions when the second switching element is turned off (on).
Description
Technical Field
The invention relates to an inverter device and a vehicle including the same.
Background
In a typical inverter device, when a switching element is turned off, an off surge voltage is applied to the switching element. When the off surge voltage is larger than the maximum rated voltage (allowable voltage) of the switching element, the switching element may be broken.
In view of the above, the inverter device may be provided with a structure for suppressing the off surge voltage.
For example, patent document 1 discloses a gate drive circuit including a gate power supply, a gate resistance circuit, a voltage value acquisition unit, and a resistance value change unit, wherein the gate power supply applies a gate voltage to a gate electrode of a switching element connected to a dc power supply, the gate resistance circuit is provided between the gate power supply and the gate electrode, the voltage value acquisition unit acquires a voltage value of the dc power supply, and the resistance value change unit changes a resistance value of the gate resistance circuit based on the voltage value of the dc power supply acquired by the voltage value acquisition unit. According to the gate drive circuit, when the voltage value of the dc power supply decreases, the off time of the switching element can be extended by increasing the resistance value of the gate resistance circuit, and thus the generation time of the surge voltage generated when the switching element is turned off becomes long, and the peak value of the surge voltage can be reduced accordingly, thereby avoiding the breakdown of the switching element.
Patent document 1: japanese unexamined patent publication JP2019-9846A
In addition, in a general inverter device, an on surge voltage is generated also when the switching element is turned on, and the switching element is broken when the on surge voltage is larger than the maximum rated voltage (allowable voltage) of the switching element, similarly to when the switching element is turned off.
In view of the above, it is also conceivable to provide the inverter device with a structure for suppressing the on surge voltage.
However, in the inverter device, the circuit is easily complicated to suppress the off surge voltage or the on surge voltage.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object thereof is to provide an inverter device and a vehicle including the inverter device, which can easily suppress an off surge voltage or an on surge voltage without complicating a circuit.
In order to achieve the above object, the present invention provides an inverter device including: an inverter circuit having a first arm having a first switching element and a second arm having a second switching element connected in series with the first switching element between a positive electrode and a negative electrode of an external power supply; a first drive circuit connected to a gate of the first switching element via a first resistance circuit, and configured to control on/off of the first switching element; and a second drive circuit that is connected to a gate of the second switching element via a second resistance circuit and controls on/off of the second switching element, wherein a total inductance value on the first arm side is larger than a total inductance value on the second arm side, and a total resistance value of a circuit portion of the first resistance circuit that functions when the first switching element is turned off is larger than a total resistance value of a circuit portion of the second resistance circuit that functions when the second switching element is turned off.
Here, the "total inductance value on the first arm side" refers to a total inductance value corresponding to the first switching element, including an inductance from the external power supply to the inverter circuit (for example, an inductance including a connection portion of the inverter circuit and a capacitor connected between the external power supply and the inverter) and an inductance within the inverter circuit (for example, an inductance including an internal wiring of the first switching element), and the "total inductance value on the second arm side" refers to a total inductance value corresponding to the second switching element, including an inductance from the external power supply to the inverter circuit (for example, an inductance including a connection portion of the inverter circuit and a capacitor connected between the external power supply and the inverter) and an inductance within the inverter circuit (for example, an inductance including an internal wiring of the second switching element).
According to the inverter device of the present invention, since the total inductance value of the first arm side having the first switching element is larger than the total inductance value of the second arm side having the second switching element, a large off surge voltage is likely to be generated in the first switching element as compared with the second switching element, but since the total resistance value of the circuit portion of the first resistance circuit that operates when the first switching element is turned off is larger than the total resistance value of the circuit portion of the second resistance circuit that operates when the second switching element is turned off, the switching time (off time) of the first switching element can be extended, and thereby the off surge voltage can be suppressed by the components necessary for a normal inverter device such as the first arm, the second arm, the first resistance circuit, and the second resistance circuit, and the off surge voltage can be suppressed easily without complicating the circuit. Therefore, it also contributes to cost reduction.
In the inverter device according to the present invention, it is preferable that a circuit portion of the first resistance circuit, which operates when the first switching element is turned off, is formed of a plurality of resistors, and/or a circuit portion of the second resistance circuit, which operates when the second switching element is turned off, is formed of a plurality of resistors.
According to the inverter device of the present invention, since the circuit portion of the first resistance circuit that functions when the first switching element is turned off is formed of the plurality of resistors and/or the circuit portion of the second resistance circuit that functions when the second switching element is turned off is formed of the plurality of resistors, the total resistance value of the circuit portion of the first resistance circuit that functions when the first switching element is turned off can be easily made different from the total resistance value of the circuit portion of the second resistance circuit that functions when the second switching element is turned off by using the standard component having the same resistance value.
In the inverter device according to the present invention, it is preferable that the resistor includes at least one of a chip resistor and a lead resistor.
In the inverter device according to the present invention, it is preferable that the first switching element is a high-side switching element and the second switching element is a low-side switching element.
In the inverter device according to the present invention, it is preferable that each of the first switching element and the second switching element is an insulated gate bipolar transistor.
Further, in order to achieve the above object, the present invention provides an inverter device including: an inverter circuit having a first arm having a first switching element and a second arm having a second switching element connected in series with the first switching element between a positive electrode and a negative electrode of an external power supply; a first drive circuit connected to the gate of the first switching element via a first resistance circuit, the first drive circuit controlling on/off of the first switching element; and a second drive circuit that is connected to a gate of the second switching element via a second resistance circuit and controls on/off of the second switching element, wherein a total inductance value on the first arm side is larger than a total inductance value on the second arm side, and a total resistance value of a circuit portion of the first resistance circuit that functions when the first switching element is turned on is larger than a total resistance value of a circuit portion of the second resistance circuit that functions when the second switching element is turned on.
Here, the "total inductance value on the first bridge arm side" refers to a total inductance value corresponding to the first switching element, including an inductance from the external power supply to the inverter circuit (for example, an inductance including a connection portion between the inverter circuit and a capacitor connected between the external power supply and the inverter) and an inductance within the inverter circuit (for example, an inductance including an internal wiring of the first switching element), and the "total inductance value on the second bridge arm side" refers to a total inductance value corresponding to the second switching element, including an inductance from the external power supply to the inverter circuit (for example, an inductance including a connection portion between the inverter circuit and a capacitor connected between the external power supply and the inverter) and an inductance within the inverter circuit (for example, an inductance including an internal wiring of the second switching element).
According to the inverter device of the present invention, since the total inductance value on the first arm side having the first switching element is larger than the total inductance value on the second arm side having the second switching element, a large on-surge voltage is likely to be generated in the first switching element as compared with the second switching element, but since the total resistance value of the circuit portion of the first resistance circuit that acts when the first switching element is turned on is larger than the total resistance value of the circuit portion of the second resistance circuit that acts when the second switching element is turned on, the switching time (on time) of the first switching element can be extended, and thereby the on-surge voltage can be suppressed by the constituent elements necessary for a normal inverter device such as the first arm, the second arm, the first resistance circuit, and the second resistance circuit, and the on-surge voltage can be easily suppressed without complicating the circuit. Therefore, it also contributes to cost reduction.
In the inverter device according to the present invention, it is preferable that a circuit portion of the first resistance circuit that functions when the first switching element is turned on is formed of a plurality of resistors, and/or a circuit portion of the second resistance circuit that functions when the second switching element is turned on is formed of a plurality of resistors.
According to the inverter device of the present invention, since the circuit portion of the first resistance circuit that functions when the first switching element is turned on is formed of the plurality of resistors and/or the circuit portion of the second resistance circuit that functions when the second switching element is turned on is formed of the plurality of resistors, the total resistance value of the circuit portion of the first resistance circuit that functions when the first switching element is turned on is easily made different from the total resistance value of the circuit portion of the second resistance circuit that functions when the second switching element is turned on by using the standard having the same resistance value.
In the inverter device according to the present invention, it is preferable that the resistor includes at least one of a chip resistor and a lead resistor.
In the inverter device according to the present invention, it is preferable that the first switching element is a high-side switching element and the second switching element is a low-side switching element.
In the inverter device according to the present invention, it is preferable that each of the first switching element and the second switching element is an insulated gate bipolar transistor.
In order to achieve the above object, the present invention provides a vehicle including any one of the inverter devices described above.
(effect of the invention)
According to the present invention, since the total inductance value of the first arm side having the first switching element is larger than the total inductance value of the second arm side having the second switching element, a large off surge voltage or on surge voltage is likely to be generated in the first switching element as compared with the second switching element, but the total resistance value of the circuit portion of the first resistance circuit that functions when the first switching element is turned off is larger than the total resistance value of the circuit portion of the second resistance circuit that functions when the second switching element is turned off, and/or the total resistance value of the circuit portion of the first resistance circuit that functions when the first switching element is turned on is larger than the total resistance value of the circuit portion of the second resistance circuit that functions when the second switching element is turned on, the switching time (off or on time) of the first switching element can be extended, and the off voltage or on voltage can be suppressed by the components necessary for a typical inverter device such as the first arm, the second arm, the first resistance circuit, and the second resistance circuit, and the surge voltage can be easily suppressed without the circuit becoming complicated in the case of the off or on. Therefore, it also contributes to cost reduction.
Drawings
Fig. 1 is a circuit diagram schematically showing an inverter device according to an embodiment of the present invention.
Fig. 2 is a partial circuit diagram schematically showing an inverter device according to an embodiment of the present invention, in which only a corresponding first switching element and second switching element of a motor are illustrated.
Fig. 3 is a graph for explaining a collector current and an off surge voltage when the switching element in the inverter circuit is off.
(symbol description)
1. Inverter device
10. Inverter circuit
11. First bridge arm
111. A first switch element
112. First diode
12. Second bridge arm
121. Second switch element
122. Second diode
20. Gate drive circuit
21. First drive circuit
22. Second drive circuit
23. First resistance circuit
231. Circuit part
232. Circuit part
24. Second resistance circuit
241. Circuit part
242. Circuit part
30. Control circuit
40. High voltage battery
50. Low-voltage battery
90. Motor with a stator having a stator core
Detailed Description
An inverter device according to an embodiment of the present invention will be described with reference to fig. 1 to 3, where fig. 1 is a circuit diagram schematically showing the inverter device according to the embodiment of the present invention, fig. 2 is a partial circuit diagram schematically showing the inverter device according to the embodiment of the present invention, in which only a corresponding first switching element and second switching element of a motor are shown, and fig. 3 is a graph for explaining a collector current and an off surge voltage when the switching elements in the inverter circuit are off.
(Integrated configuration of inverter device)
As shown in fig. 1, the inverter device 1 includes: an inverter circuit 10, the inverter circuit 10 having a switching element; and a gate drive circuit 20, the gate drive circuit 20 transmitting a drive signal to the inverter circuit 10 to control on/off of the switching elements of the inverter circuit 10.
Here, as shown in fig. 1, the inverter circuit 10 is supplied with power from an external high-voltage battery 40 (external power supply in the present invention).
Further, as shown in fig. 1, the inverter device 1 further includes a control circuit 30, and the control circuit 30 is supplied with power from an external low-voltage battery 50 and sends a control signal to the gate drive circuit 20.
As shown in fig. 1, the inverter device 1 is used to supply power to a motor 90 (in the illustrated example, the motor has three UVW phases, but the motor is not limited to this).
(Structure of inverter Circuit)
As shown in fig. 1, inverter circuit 10 includes first arm 11 and second arm 12, first arm 11 having first switching element 111, and second arm 12 having second switching element 121 connected in series with first switching element 111 between the positive and negative poles of the external power supply.
Here, as shown in fig. 1, the first arm 11 is an upper arm, and the first switching element 111 is a high-side switching element; second leg 12 is a lower leg, and second switching element 121 is a low-side switching element. Specifically, first arm 11 includes a plurality of first switching elements 111 (three first switching elements are provided corresponding to three VUW phases of motor 90 in the illustrated example) connected in parallel, first switching elements 111 are insulated gate bipolar transistors, and a collector is connected to a positive electrode of an external power supply; the second arm 12 includes a plurality of (three in the illustrated example corresponding to the VUW three phases of the motor 90) second switching elements 121 connected in parallel, and the second switching elements 121 are also insulated gate bipolar transistors, and have a collector connected to an emitter of the first switching element 111 and an emitter connected to a negative electrode of an external power supply. Further, a connection point between the first switching element 111 and the second switching element 121 is connected to a coil of the motor 90 via an electric wire (in the illustrated example, a connection point between the first switching element 111 and the second switching element 121 corresponding to U of the motor 90 is connected to a U-phase coil of the motor 90 via an electric wire, a connection point between the first switching element 111 and the second switching element 121 corresponding to V of the motor 90 is connected to a V-phase coil of the motor 90 via an electric wire, and a connection point between the first switching element 111 and the second switching element 121 corresponding to W of the motor 90 is connected to a W-phase coil of the motor 90 via an electric wire).
Further, as shown in fig. 1, first leg 11 has first diode 112 connected in antiparallel with first switching element 111; second leg 12 has second diode 122 connected in anti-parallel with second switching element 121. Specifically, first arm 11 includes a plurality of first diodes 112 corresponding to a plurality of first switching elements 111 connected in parallel, respectively; similarly, second arm 12 includes a plurality of second diodes 122 corresponding to a plurality of second switching elements 121 connected in parallel.
(Gate driver circuit)
As shown in fig. 2, the gate driving circuit 20 includes: a first drive circuit 21 (for example, formed of a chip), the first drive circuit 21 being connected to a gate of the first switching element 111 via a first resistance circuit 23 (for example, provided on a circuit board), and controlling on/off of the first switching element 111; and a second drive circuit 22 (for example, constituted by a chip), the second drive circuit 22 being connected to the gate of the second switching element 112 via a second resistance circuit 24 (for example, provided on a circuit board), and controlling the on/off of the second switching element 112.
Here, as shown in fig. 2, the circuit portion 231 of the first resistance circuit 23 that functions when the first switching element 111 is turned off is formed of a plurality of resistances (in the illustrated example, the plurality of resistances are connected in parallel, but not limited thereto), and the circuit portion 241 of the second resistance circuit 24 that functions when the second switching element 112 is turned off is formed of a plurality of resistances (in the illustrated example, the plurality of resistances are connected in parallel, but not limited thereto). The circuit portion 232 of the first resistance circuit 23 that functions when the first switching element 111 is turned on is formed of a plurality of resistors (in the illustrated example, the plurality of resistors are connected in parallel, but not limited thereto), and the circuit portion 242 of the second resistance circuit 24 that functions when the second switching element 112 is turned on is formed of a plurality of resistors (in the illustrated example, the plurality of resistors are connected in parallel, but not limited thereto). Further, as the resistor, a chip resistor and/or a lead resistor may be used.
(off surge voltage generated when the switching element is off)
In the inverter circuit, when the switching element is turned off, as shown in fig. 3, an off surge voltage Vce having Vcep as a peak value is generated, and the off surge voltage Vce can be expressed by the following equation:
Vce＝-Ls×dlc/dt+Vcc
the off-surge voltage Vce is a collector-emitter voltage (collector-emitter voltage), ls is a floating inductance (floating inductance), lc is a collector current (collector current), and Vcc is an input voltage.
Further, the larger the-Ls is, the larger the peak value Vcep of the off surge voltage Vce is.
(suppression measures for off-surge voltage)
In the present embodiment, in order to suppress the off surge voltage, the following configuration is adopted: the total inductance value on the first arm 11 side is made larger than the total inductance value on the second arm 12 side (for example, the inductance value of the first switching element 111 is made larger than the inductance value of the second switching element 112, and-Ls on the first arm 11 side is made larger than-Ls on the second arm 12 side), and the total resistance value of the circuit portion of the first resistance circuit 23 that functions when the first switching element 111 is turned off is made larger than the total resistance value of the circuit portion of the second resistance circuit 24 that functions when the second switching element 112 is turned off.
(main effects of the present embodiment)
According to the inverter device 1 of the present embodiment, the total inductance value on the first arm 11 side having the first switching element 111 is larger than the total inductance value on the second arm 12 side having the second switching element 112, and therefore a large off-surge voltage is likely to be generated in the first switching element 111 as compared with the second switching element 112, but the total resistance value of the circuit portion of the first resistance circuit 23 that operates when the first switching element 111 is turned off is larger than the total resistance value of the circuit portion of the second resistance circuit 24 that operates when the second switching element 112 is turned off, and therefore the switching time (off time) of the first switching element 111 can be extended, whereby the off-surge voltage can be suppressed by the constituent elements necessary for a normal inverter device such as the first arm 11, the second arm 12, the first resistance circuit 23, and the second resistance circuit 24, and the off-surge voltage can be easily suppressed without complicating the circuit. Therefore, it also contributes to cost reduction.
Further, according to inverter device 1 of the present embodiment, the total inductance value of first arm 11 side having first switching element 111 is larger than the total inductance value of second arm 12 side having second switching element 112, and therefore a large on-surge voltage is likely to be generated in first switching element 111 as compared with second switching element 112, but the total resistance value of the circuit portion of first resistance circuit 23 that functions when first switching element 111 is turned on is larger than the total resistance value of the circuit portion of second resistance circuit 24 that functions when second switching element 112 is turned on, and therefore the switching time (on time) of first switching element 111 can be extended, and therefore the on-surge voltage can be suppressed by the components necessary for a normal inverter device such as first arm 11, second arm 12, first resistance circuit 23, and second resistance circuit 24, and the on-surge voltage can be easily suppressed without complicating the circuit. Therefore, it also contributes to cost reduction.
The present invention is described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments.
For example, in the above embodiment, the inverter device 1 is applicable to a vehicle to control the operation of the vehicle.
In the above embodiment, the inverter device 1 is used to supply power to the motor 90, but the present invention is not limited to this, and may be applied to supply power to other devices.
In the above-described embodiment, the total resistance value of the circuit portion of the first resistance circuit 23 that functions when the first switching element 111 is turned off is larger than the total resistance value of the circuit portion of the second resistance circuit 24 that functions when the second switching element 112 is turned off, and the total resistance value of the circuit portion of the first resistance circuit 23 that functions when the first switching element 111 is turned on is larger than the total resistance value of the circuit portion of the second resistance circuit 24 that functions when the second switching element 112 is turned on, but the present invention is not limited thereto, and the total resistance value of only the circuit portion 231 of the first resistance circuit 23 that functions when the first switching element 111 is turned off may be set larger than the total resistance value of the circuit portion 241 of the second resistance circuit 24 that functions when the second switching element 112 is turned off, or the total resistance value of only the circuit portion 232 of the first resistance circuit 23 that functions when the first switching element 111 is turned on may be set larger than the total resistance value of the circuit portion 242 of the second resistance circuit 24 that functions when the second switching element 112 is turned on.
In the above embodiment, first arm 11 is the upper arm, and first switching element 111 is the high-side switching element; the second arm 12 is a lower arm and the second switching element 121 is a low-side switching element, but the present invention is not limited thereto, and the first arm 11 may be a lower arm, the first switching element 111 may be a low-side switching element, the second arm 12 may be an upper arm, and the second switching element 121 may be a high-side switching element.
In the above embodiment, the circuit portion 231 of the first resistance circuit 23 that functions when the first switching element 111 is turned off is formed of a plurality of resistors, the circuit portion 241 of the second resistance circuit 24 that functions when the second switching element 112 is turned off is formed of a plurality of resistors, the circuit portion 232 of the first resistance circuit 23 that functions when the first switching element 111 is turned on is formed of a plurality of resistors, and the circuit portion 242 of the second resistance circuit 24 that functions when the second switching element 112 is turned on is formed of a plurality of resistors, but the present invention is not limited thereto, and the circuit portions 231, 241, 232, and 242 may be formed of a single resistor, and the circuit portion 241 may be formed of a single resistor.
In the above embodiment, a smoothing capacitor or the like may be provided between the external power supply and the inverter circuit 10.
It should be understood that the present invention can freely combine the respective components of the embodiments, or appropriately modify or omit the respective components of the embodiments within the scope thereof.
Claims (11)
1. An inverter device comprising: an inverter circuit having a first arm having a first switching element and a second arm having a second switching element connected in series with the first switching element between a positive electrode and a negative electrode of an external power supply; a first drive circuit connected to the gate of the first switching element via a first resistance circuit, the first drive circuit controlling on/off of the first switching element; and a second drive circuit connected to a gate of the second switching element via a second resistance circuit and controlling on/off of the second switching element,
a total inductance value of the first bridge arm side is greater than a total inductance value of the second bridge arm side,
the total resistance value of a circuit portion of the first resistance circuit that functions when the first switching element is turned off is larger than the total resistance value of a circuit portion of the second resistance circuit that functions when the second switching element is turned off.
2. The inverter device according to claim 1,
a circuit portion of the first resistance circuit that functions when the first switching element is turned off is constituted by a plurality of resistances,
and/or the presence of a gas in the atmosphere,
a circuit portion of the second resistance circuit that functions when the second switching element is turned off is composed of a plurality of resistances.
3. The inverter device according to claim 2,
the resistor includes at least one of a chip resistor and a lead resistor.
4. The inverter device according to claim 1,
the first switching element is a high-side switching element,
the second switching element is a low-side switching element.
5. The inverter device according to claim 1,
the first switching element and the second switching element are insulated gate bipolar transistors, respectively.
6. An inverter device comprising: an inverter circuit having a first arm having a first switching element and a second arm having a second switching element connected in series with the first switching element between a positive pole and a negative pole of an external power supply; a first drive circuit connected to the gate of the first switching element via a first resistance circuit, the first drive circuit controlling on/off of the first switching element; and a second drive circuit connected to a gate of the second switching element via a second resistance circuit and controlling on/off of the second switching element,
a total inductance value of the first bridge arm side is greater than a total inductance value of the second bridge arm side,
the total resistance value of a circuit portion of the first resistance circuit that functions when the first switching element is turned on is larger than the total resistance value of a circuit portion of the second resistance circuit that functions when the second switching element is turned on.
7. The inverter device according to claim 6,
a circuit portion of the first resistance circuit that functions when the first switching element is turned on is constituted by a plurality of resistances,
and/or the presence of a gas in the gas,
the circuit portion of the second resistance circuit that functions when the second switching element is turned on is formed of a plurality of resistors.
8. The inverter apparatus according to claim 7,
the resistor includes at least one of a chip resistor and a lead resistor.
9. The inverter device according to claim 6,
the first switching element is a high-side switching element,
the second switching element is a low-side switching element.
10. The inverter device according to claim 6,
the first switching element and the second switching element are each an insulated gate bipolar transistor.
11. A vehicle characterized by comprising the inverter device of any one of claims 1 to 10.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110570046.7A CN115395812A (en) | 2021-05-25 | 2021-05-25 | Inverter device and vehicle including the same |
| JP2022084125A JP2022181192A (en) | 2021-05-25 | 2022-05-23 | Inverter device and vehicle comprising the same |
| DE102022113221.8A DE102022113221A1 (en) | 2021-05-25 | 2022-05-25 | INVERTER DEVICE AND VEHICLE WITH SUCH INVERTER DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110570046.7A CN115395812A (en) | 2021-05-25 | 2021-05-25 | Inverter device and vehicle including the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115395812A true CN115395812A (en) | 2022-11-25 |
Family
ID=83996983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110570046.7A Pending CN115395812A (en) | 2021-05-25 | 2021-05-25 | Inverter device and vehicle including the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2022181192A (en) |
| CN (1) | CN115395812A (en) |
| DE (1) | DE102022113221A1 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6904091B2 (en) | 2017-06-21 | 2021-07-14 | 富士電機株式会社 | Gate drive circuit and inverter device |
-
2021
- 2021-05-25 CN CN202110570046.7A patent/CN115395812A/en active Pending
-
2022
- 2022-05-23 JP JP2022084125A patent/JP2022181192A/en active Pending
- 2022-05-25 DE DE102022113221.8A patent/DE102022113221A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022181192A (en) | 2022-12-07 |
| DE102022113221A1 (en) | 2022-12-01 |
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