CN206132888U - Three-phase drive plate fault determination circuit and three-phase drive plate - Google Patents
Three-phase drive plate fault determination circuit and three-phase drive plate Download PDFInfo
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- CN206132888U CN206132888U CN201621157758.7U CN201621157758U CN206132888U CN 206132888 U CN206132888 U CN 206132888U CN 201621157758 U CN201621157758 U CN 201621157758U CN 206132888 U CN206132888 U CN 206132888U
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Abstract
The utility model provides a circuit and three-phase drive plate are confirmed to three-phase drive plate fault. Wherein the fault determination circuit includes: the reference voltage generation circuit comprises a comparison circuit and a reference voltage generation circuit, wherein the reference voltage generation circuit comprises a first reference voltage generation circuit and/or a second voltage generation circuit. The technical scheme of the utility model, can make the work of three-phase drive plate safe more, reliable.
Description
Technical field
This utility model is related to control field, more particularly to three-phase drive plate fault determination circuit and three-phase drive plate.
Background technology
For three phase variable frequency driving plate, if Switching Power Supply adopts high-voltage switch power supply, rectification side not to control using diode
The application scenario of rectification, there are the following problems for meeting：If three-phase alternating current input voltage L1, L2, L3 is any one with zero line reversal connection,
At this moment rectifier bridge is operated in biphase rectification mode, arranges output (electrochemical capacitor two ends) voltage or 540VDC of bridge, now high
Compressing switch power supply can be with normal work, if now started shooting, and driving plate also can be work, but now rectifier bridge is operated in
Biphase rectification mode, the now input of rectifier bridge, output current can than three phase rectifier when double, peak point current more can several times
Increase, if do not protected, the electric current on rectifier bridge may exceed the rated value in specifications, or not reach drop volume
Use condition, if rectifier bridge works long hours under these conditions, rectifier bridge heating can be very serious, and rectifier bridge is easy to damage
Bad, reliability can be substantially reduced.
If the overtension of three-phase alternating current input voltage L1, L2, L3, it will cause the DC bus-bar voltage mistake after rectification
Height, if busbar voltage exceedes certain value, will certainly damage inversion unit, cause the less reliable of driving plate.
Utility model content
Main purpose of the present utility model is the defect for overcoming above-mentioned prior art, it is proposed that a kind of three-phase drive plate event
Barrier determines circuit and three-phase drive plate.In to solve prior art, three-phase drive plate is input into zero live wire reversal connection, input voltage mistake
Height, the infringement that system is caused.
On the one hand this utility model provides a kind of three-phase drive plate fault determination circuit, including comparison circuit and reference electricity
Pressure generative circuit, wherein the reference voltage generating circuit includes the first reference voltage generating circuit and/or the second reference voltage
Generative circuit；The three-phase alternating-current supply includes three input ports, wherein between first port (L1) and second port (L2)
Voltage be first voltage, the voltage between second port (L2) and the 3rd port (L3) be second voltage；The first voltage,
Second voltage equal proportion is converted into tertiary voltage, the 4th voltage；First reference voltage generating circuit is used to generate first
Reference voltage；Second reference voltage generating circuit is used to generate the second reference voltage；The comparison circuit, for when described
When at least one of tertiary voltage, the 4th voltage are less than first reference voltage, confirm that the three-phase alternating-current supply is present
Zero line, live wire reversal connection failure；And/or when at least one of tertiary voltage, the 4th voltage are more than the second reference voltage, it is determined that
At least one has over-voltage fault in three input ports of three-phase alternating-current supply；Wherein, second reference voltage is more than the
One reference voltage.
Alternatively, when the comparison circuit determines that the three-phase alternating-current supply has zero line, live wire reversal connection failure and/or institute
When stating in three input ports of three-phase alternating-current supply at least one and there is over-voltage fault, stoppage protection is triggered.
Alternatively, the comparison circuit includes first comparator and/or the second comparator, the first reference voltage conduct
The end in the same direction input of the first comparator and/or second comparator, second reference voltage is used as the described first ratio
Compared with device and/or second comparator backward end be input into, the tertiary voltage as first comparator input voltage, it is described
Input voltage of 4th voltage as second comparator.
Alternatively, first reference voltage generating circuit includes the first resistor (R103) and second resistance of series connection
(R104), the first resistor is connected with regulated power supply, and the regulated power supply obtains the first reference voltage after partial pressure；It is described
Second reference voltage generating circuit include series connection 3rd resistor (R105) and the 4th resistance (R106), the 3rd resistor with it is steady
Voltage source is connected, and the regulated power supply obtains the second reference voltage after partial pressure.
Alternatively, the first voltage, second voltage equal proportion are converted into tertiary voltage, the 4th voltage includes described the
One voltage generates the tertiary voltage through the first rectification circuit, the first filter circuit and the first bleeder circuit, and described second is electric
Pressure generates the 4th voltage through the second rectification circuit, the second filter circuit, the second bleeder circuit.
Alternatively, for when at least one of the tertiary voltage, the 4th voltage be less than first reference voltage when,
Confirm that the three-phase alternating-current supply has zero line, live wire reversal connection failure and includes：When only described tertiary voltage is less than the described first ginseng
When examining voltage, there is zero line, fire reversal connection failure in the first port for determining the three-phase alternating-current supply；When only described 4th voltage
During less than first reference voltage, there is zero line, fire reversal connection failure in the 3rd port for determining the three-phase alternating-current supply；When
The tertiary voltage and the 4th voltage are respectively less than the first reference voltage, and the second port for determining the three-phase alternating-current supply is deposited
In zero line, fire reversal connection failure.
The another aspect of this utility model provide a kind of three-phase drive plate, including it is aforementioned it is arbitrary as described in failure determine electricity
Road.
Scheme of the present utility model, solve three-phase alternating current input voltage L1, L2, L3 it is any one with zero line reversal connection and/
Or the problem that three-phase alternating current input voltage L1, L2, L3 is too high, prevent rectifier bridge to be operated in biphase rectification mode, cause rectifier bridge
Electric current is excessive, temperature rise is too high, extremely flimsy risk, and/or is prevented from that busbar voltage is too high, and inversion unit bears too high
Voltage stress and damage.This circuit structure is simple, and the device for using is few, it is not necessary to individually develop one block of plate, directly onboard to master
On plate, and the space very little for needing, low cost.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes of the present utility model one
Point, schematic description and description of the present utility model is used to explain this utility model, does not constitute to of the present utility model
Improper restriction.In the accompanying drawings：
Fig. 1 is the structural representation of the embodiment of three-phase drive plate fault determination circuit one that this utility model is provided；
Fig. 2 is the circuit theory diagrams of the embodiment of three-phase drive plate fault determination circuit one that this utility model is provided；
Fig. 3 is the structural representation of the embodiment of three-phase drive plate one that this utility model is provided.
Specific embodiment
It is concrete below in conjunction with this utility model to make the purpose of this utility model, technical scheme and advantage clearer
Embodiment and corresponding accompanying drawing are clearly and completely described to technical solutions of the utility model.Obviously, described embodiment
Only it is a part of embodiment of this utility model, rather than the embodiment of whole.Based on the embodiment in this utility model, this area
The every other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to this utility model
The scope of protection.
It should be noted that specification and claims of the present utility model and the term " first " in above-mentioned accompanying drawing,
" second " etc. is the object for distinguishing similar, without being used to describe specific order or precedence.It should be appreciated that so
The data for using can be exchanged in the appropriate case, so that embodiment of the present utility model described herein can be with except at this
In diagram or describe those beyond order implement.Additionally, term " comprising " and " having " and their any deformation, meaning
Figure is that covering is non-exclusive to be included, and for example, contains process, method, system, product or the equipment of series of steps or unit
Be not necessarily limited to those steps or the unit clearly listed, but may include clearly not list or for these processes,
Other intrinsic steps of method, product or equipment or unit.
Fig. 1 is the structural representation of the embodiment of three-phase drive plate fault determination circuit one that this utility model is provided.This
The specific embodiment of utility model one, as shown in Figure 1.A kind of three-phase drive plate fault determination circuit 110, including comparator 1103
And reference voltage generating circuit, wherein the reference voltage generating circuit include the first reference voltage generating circuit 1101 and/or
Second voltage generative circuit 1102.
Three-phase alternating-current supply includes three input ports, and the wherein voltage between first port L1 and second port L2 is the
One voltage, the voltage between second port L2 and the 3rd port L3 is second voltage.The first voltage, second voltage equal proportion
Tertiary voltage, the 4th voltage are converted into, enable to be suitable to the input of comparator.
For example, the input of comparator for (0,1) in the range of value, then first voltage, such as 340V, 540V etc. can be pressed
Change into into tertiary voltage according to certain ratio, i.e., (0,1) in the range of value.Similar, also equal proportion is converted into second voltage
4th voltage.
First reference voltage generating circuit is used to generate the first reference voltage.Second reference voltage generating circuit is used to generate
Second reference voltage.For example, the first reference voltage RL is arranged into 0.3V, the second reference voltage RH is set to 0.77V.
For example, the first reference voltage generates electricity and includes by first resistor, the bleeder circuit that second resistance is composed in series, wherein
First resistor is connected with regulated power supply, and second resistance is connected to the ground.Regulated power supply can select 3.3V, 5V, 12V, 24V etc..When
When selecting 3.3V, in order to reach the voltage of 0.3V, first resistor can select the resistance of 10K Ω, second resistance to select 1K
The resistance of Ω.
For example, the second reference voltage generates electricity and includes by 3rd resistor, the bleeder circuit of the 4th resistant series composition, wherein
3rd resistor is connected with regulated power supply, and the 4th resistance is connected to the ground.Regulated power supply can select 3.3V, 5V, 12V, 24V etc..When
When selecting 3.3V, in order to reach the voltage of 0.77V, 3rd resistor can select the resistance of 3.3K Ω, the 4th resistance to select
The resistance of 1K Ω.
The comparison circuit, for when at least one of the tertiary voltage, the 4th voltage are less than the described first reference
During voltage, confirm that the three-phase alternating-current supply has zero line, live wire reversal connection failure；
And/or when at least one of tertiary voltage, the 4th voltage are more than the second reference voltage, determine three-phase alternating current
At least one has over-voltage fault in three input ports in source；Wherein, second reference voltage is more than the first reference voltage.
For example, the value of tertiary voltage and the 4th voltage changes with input voltage, input voltage reduce, tertiary voltage and
4th voltage diminishes, and input voltage is raised, and tertiary voltage and the 4th voltage become big.When L1, L2, L3 any it is anti-with zero line
Connect, the voltage of tertiary voltage or the 4th voltage has one and is less than the first reference voltage certainly.
When any phase voltage of L1, L2, L3 is too high or three-phase voltage is simultaneously too high, all can cause tertiary voltage be higher than,
4th voltage is higher than or tertiary voltage, the 4th voltage are simultaneously above the second reference voltage.
Alternatively, at least one in there are three input ports of live wire reversal connection failure and/or the three-phase alternating-current supply
It is individual to trigger stoppage protection when there is over-voltage fault, a high level signal is for example sent, trigger stoppage protection.
Alternatively, comparing unit includes first comparator and/or the second comparator, and first reference voltage is used as described
The end in the same direction input of first comparator and/or second comparator, second reference voltage is used as the first comparator
And/or second comparator backward end input, the tertiary voltage as first comparator input voltage, the described 4th
Input voltage of the voltage as second comparator；Wherein first comparator, the second comparator include window comparator.
For example, 3.3V power supplys obtain RL signals after first resistor, second resistance partial pressure, compare for comparator first
(No. 5 pins of comparator) reference voltage is held in the same direction compared with device U1 and the second comparator U2,3.3V power supplys are through 3rd resistor, the 4th electric
After resistance partial pressure, RH signals are obtained, for first comparator U1 and the second comparator U2 backward ends (No. 2 pins of comparator) with reference to electricity
Pressure, wherein, 0<RL<RH<3.3V.
Alternatively, the first voltage, second voltage equal proportion are converted into tertiary voltage, the 4th voltage includes described the
One voltage generates the tertiary voltage through the first rectification circuit, the first filter circuit and the first bleeder circuit, and described second is electric
Pressure generates the 4th voltage through the second rectification circuit, the second filter circuit, the second bleeder circuit.
For example, first port and second port first pass around the first rectification circuit.First rectification circuit, such as by diode
D101, D102, D103, D104 constitute a single-phase rectification bridge, for carrying out rectification to first port, second port.
Through the first filter circuit after rectification, such as filter capacitor C101 can obtain galvanic current on C101
Pressure.This galvanic current pressure, by the first partial pressure unit, for example, carries out partial pressure by resistance, obtains tertiary voltage UI_1 letters
Number, this signal is used for the input of first comparator.
Second port and the 3rd port first pass around the second rectification circuit.Second rectification circuit, for example by diode D201,
D202, D203, D204 constitute a single-phase rectification bridge, for carrying out rectification to second port, the 3rd port.
Through the second filter circuit after rectification, such as filter capacitor C201 can obtain galvanic current on C201
Pressure.This galvanic current pressure, by the second partial pressure unit, for example, carries out partial pressure by resistance, obtains the 4th voltage UI_2 letters
Number, this signal is used for the input of the second comparator.
Alternatively, for when at least one of the tertiary voltage, the 4th voltage be less than first reference voltage when,
Confirm that the three-phase alternating-current supply has zero line, live wire reversal connection failure and includes：When only described tertiary voltage is less than the described first ginseng
When examining voltage, there is zero line, fire reversal connection failure in the first port for determining the three-phase alternating-current supply；When only described 4th voltage
During less than first reference voltage, there is zero line, fire reversal connection failure in the 3rd port for determining the three-phase alternating-current supply；When
The tertiary voltage and the 4th voltage are respectively less than the first reference voltage, and the second port for determining the three-phase alternating-current supply is deposited
In zero line, fire reversal connection failure.
Fig. 2 is the circuit theory diagrams of the embodiment of three-phase drive plate fault determination circuit one that this utility model is provided.This
The specific embodiment of utility model one, with reference to the various aspects of this utility model other embodiment.
As shown in Fig. 2 the three-phase input of three-phase drive plate include three ports, first port L1, second port L2, the 3rd
Port L3.
First port and second port first pass around the first rectification circuit.First rectification circuit, for example by diode D101,
D102, D103, D104 constitute a single-phase rectification bridge, for carrying out rectification to first port, second port.
Through the first filter circuit after rectification, such as filter capacitor C101 can obtain galvanic current on C101
Pressure.This galvanic current pressure, by the first partial pressure unit, for example, carries out partial pressure by resistance R101, R102, obtains UI_1 letters
Number, this signal is used for the input of comparator U1.
Second port and the 3rd port first pass around the second rectification circuit.Second rectification circuit, for example by diode D201,
D202, D203, D204 constitute a single-phase rectification bridge, for carrying out rectification to second port, the 3rd port.
Through the second filter circuit after rectification, such as filter capacitor C201 can obtain galvanic current on C201
Pressure.This galvanic current pressure, by the second partial pressure unit, for example, carries out partial pressure by resistance R201, R202, obtains UI_2 letters
Number, this signal is used for the input of comparator U2.
D101, D102, D103, D104, D201, D202, D203, D204 are industrial frequency rectifying diode, are preferably selected just
To the relatively small diode of electric current, such as 1A, the diode of larger forward current can cause the unnecessary increase of cost.But this
The reverse pressure performance of a little diodes will get well, and for example, when alternating current input power supplying is 380V, diode can bear the reverse of 540V
Pressure, preferably reverse pressure voltage is selected in the range of 1200V to 1600V.
C101, C201 are used for energy storage, filtering.For the power supply that 380V exchanges input, C101, C102 can bear the straight of 540V
Stream voltage, the scope of preferably pressure 600V to 1000V.Unsuitable excessive, the electric capacity of preferred 10uf or so of capacitance, and according to reality
Border situation is adjusted.
Resistance R101, R102 carry out forming tertiary voltage after partial pressure to the voltage that C101 is exported, resistance R201, R202 couple
The voltage of C201 outputs carries out forming the 4th voltage after partial pressure.
For example, under normal circumstances, first voltage and second voltage are 380V, and after rectifying and wave-filtering, voltage reaches 540V,
In order to be converted in the working range of comparator, voltage can be carried out after electric resistance partial pressure, reach (0,1) in the range of value.Example
Such as, from the resistance of 1032K Ω, R102, R202 select the resistance of 1K Ω for R101, R201.Now, under normal circumstances, after partial pressure
Voltage be 0.523.
Now, the first reference voltage RL can be arranged 0.3V as needed, the second reference voltage RH is set to 0.77V.
For example, the first reference voltage generates electricity and includes by first resistor R103, the partial pressure that second resistance R104 is composed in series
Circuit, wherein first resistor R103 are connected with regulated power supply, and second resistance R104 is connected to the ground.Regulated power supply can be selected
3.3V, 5V, 12V, 24V etc..When 3.3V is selected, in order to reach the voltage of 0.3V, R103 can select the resistance of 10K Ω,
R104 can select the resistance of 1K Ω.
For example, the second reference voltage generates electricity and includes by 3rd resistor R105, the partial pressure that the 4th resistance R106 is composed in series
Circuit, wherein 3rd resistor R105 are connected with regulated power supply, and the 4th resistance R106 is connected to the ground.Regulated power supply can be selected
3.3V, 5V, 12V, 24V etc..When 3.3V is selected, in order to reach the voltage of 0.77V, R105 can select the resistance of 3.3K Ω,
R106 can select the resistance of 1K Ω.
The value of UI_1 and UI_2 changes with input voltage, and input voltage is reduced, and UI_1 and UI_2 diminishes, input voltage
Raise, UI_1 and UI_2 becomes big.When L1, L2, L3 any has one certainly with the voltage of zero line reversal connection, UI_1 or UI_2
It is less than 0.3V's.
When any phase voltage of L1, L2, L3 is too high or three-phase voltage is simultaneously too high, all can cause UI_1 be higher than, UI_2
Higher than or UI_1, UI_2 simultaneously above 0.77V.
3.3V power supplys obtain RL signals after R103, R104 partial pressure, and for comparator U1 and U2 (comparator 5 is held in the same direction
Number pin) reference voltage, 3.3V power supplys obtain RH signals after R105, R106 partial pressure, for comparator U1 and U2 backward end
(No. 2 pins of comparator) reference voltage, wherein, 0<RL<RH<3.3V.Wherein, comparator is window comparator.
L1, L2 rectification circuit, obtains UI_1 signals after rectification and voltage division, when voltage UI_1 is more than RH, be now naturally larger than
RL, so integrated transporting discharging U1-A is output as high level, U1-B is output as low level so that D105 conductings, D106 cut-offs, makes
It is high level to obtain U_OUT1, and when it is high level that DSP detects U_OUT1, protection is shut down.
When voltage UI_1 is less than RL, now certainly less than RH, so integrated transporting discharging U1-A is output as low level, U1-B
High level is output as so that D105 cut-offs, D106 conductings so that U_OUT1 is high level, when DSP detects U_OUT1 for height
During level, protection is shut down.
As voltage RL<UI_1<During RH, integrated transporting discharging U1-A is output as low level, and U1-B is output as low level so that
D105 cut-offs, D106 cut-offs so that U_OUT1 is low level, when it is low level that DSP detects U_OUT1, illustrates driving plate plate
Normal operation.
In the same manner, the course of work of same L1, L2 rectification circuit of the course of work of L2, L3 rectification circuit is the same.
In figure, R107, R207 are current-limiting resistance, and R108, R208 are pull down resistor, and C102, C202 are filter capacitor.
For example, the busbar voltage after L1, L2 rectification is 310VDC, and the busbar voltage after L2, L3 rectification is 540VDC, then say
Bright L1 and zero line reversal connection, work as UI_1<RL, then U_OUT1 is high level, abnormal, RL<UI_2<RH, then U_OUT2 is low level, just
Often, as long as DSP detects U_OUT1, U_OUT2, any one is high level, then carry out protection shutdown.
For example, the busbar voltage after L1, L2 rectification is 540VDC, and the busbar voltage after L2, L3 rectification is 310VDC, then say
Bright L3 and zero line reversal connection, work as RL<UI_1<RH, then U_OUT1 is low level, normally, UI_2<RL, then U_OUT2 is high level, different
Often, as long as DSP detects U_OUT1, U_OUT2, any one is high level, then carry out protection shutdown.
For example, the busbar voltage after L1, L2 rectification is 310VDC, and the busbar voltage after L2, L3 rectification is 310VDC, then say
Bright L2 and zero line reversal connection, work as UI_1<RL, then U_OUT1 is high level, abnormal, UI_2<RL, then U_OUT2 is high level, abnormal,
As long as DSP detects U_OUT1, U_OUT2, any one is high level, then carry out protection shutdown.
For example, when any phase voltage of three-phase alternating current input voltage L1, L2, L3 is too high or three-phase voltage is simultaneously too high,
Will cause that UI_1 is too high, UI_2 is too high or UI_1, UI_2 are simultaneously too high, as long as reaching UI_1>RH or UI_2>RH or UI_1,
UI_2 is simultaneously greater than RH, and U_OUT1, U_OUT2 will export high level, so as to carry out protection shutdown.
Fig. 3 is the structural representation of the embodiment of three-phase drive plate one that this utility model is provided.This utility model one has
Body embodiment, with reference to the various aspects of other embodiment.A kind of three-phase drive plate 2, including this utility model each enforcement
The fault determination circuit 21 that mode is provided.
To sum up, the scheme that this utility model is provided, realizes the too high work(of zero live wire reversal connection of input and/or input voltage
Can, the circuit has the advantages that few simple structure, device, low cost, reliability are high.
Embodiment of the present utility model is the foregoing is only, this utility model is not limited to, for this area
Technical staff for, this utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle within,
Any modification, equivalent substitution and improvements made etc., should be included within right of the present utility model.
Claims (7)
1. a kind of three-phase drive plate fault determination circuit, it is characterised in that including comparison circuit and reference voltage generating circuit, its
Described in reference voltage generating circuit include the first reference voltage generating circuit and/or the second reference voltage generating circuit；
The three-phase alternating-current supply includes three input ports, the wherein voltage between first port (L1) and second port (L2)
For first voltage, the voltage between second port (L2) and the 3rd port (L3) is second voltage；It is the first voltage, second electric
Pressure equal proportion is converted into tertiary voltage, the 4th voltage；
First reference voltage generating circuit is used to generate the first reference voltage；
Second reference voltage generating circuit is used to generate the second reference voltage；
The comparison circuit,
For when at least one of the tertiary voltage, the 4th voltage are less than first reference voltage, confirming described three
There is zero line, live wire reversal connection failure in cross streams power supply；
And/or when at least one of tertiary voltage, the 4th voltage are more than the second reference voltage, determine three-phase alternating-current supply
At least one has over-voltage fault in three input ports；Wherein, second reference voltage is more than the first reference voltage.
2. circuit according to claim 1, it is characterised in that when the comparison circuit determines that the three-phase alternating-current supply is deposited
At least one has over-voltage fault in three input ports of zero line, live wire reversal connection failure and/or the three-phase alternating-current supply
When, trigger stoppage protection.
3. circuit according to claim 1 and 2, it is characterised in that the comparison circuit includes first comparator and/or the
Two comparators, first reference voltage is input into as the end in the same direction of the first comparator and/or second comparator, institute
The backward end that the second reference voltage is stated as the first comparator and/or second comparator is input into, the tertiary voltage
As the input voltage of first comparator, input voltage of the 4th voltage as second comparator.
4. circuit according to claim 1 and 2, it is characterised in that first reference voltage generating circuit includes series connection
First resistor (R103) and second resistance (R104), the first resistor is connected with regulated power supply, and the regulated power supply is passed through
The first reference voltage is obtained after partial pressure；
Second reference voltage generating circuit include series connection 3rd resistor (R105) and the 4th resistance (R106), the described 3rd
Resistance is connected with regulated power supply, and the regulated power supply obtains the second reference voltage after partial pressure.
5. circuit according to claim 1 and 2, it is characterised in that the first voltage, second voltage equal proportion are converted into
Include the first voltage through the first rectification circuit, the first filter circuit and the first partial pressure electricity for tertiary voltage, the 4th voltage
Road generates the tertiary voltage, and the second voltage is generated through the second rectification circuit, the second filter circuit, the second bleeder circuit
4th voltage.
6. circuit according to claim 1 and 2, it is characterised in that for when in the tertiary voltage, the 4th voltage extremely
When lacking one less than first reference voltage, confirm that the three-phase alternating-current supply has zero line, live wire reversal connection failure and includes：When
Only described tertiary voltage be less than first reference voltage when, determine the three-phase alternating-current supply first port exist zero line,
Fire reversal connection failure；When only described 4th voltage is less than first reference voltage, the of the three-phase alternating-current supply is determined
There is zero line, fire reversal connection failure in three ports；When the tertiary voltage and the 4th voltage are respectively less than the first reference voltage, really
There is zero line, fire reversal connection failure in the second port of the fixed three-phase alternating-current supply.
7. a kind of three-phase drive plate, it is characterised in that include the fault determination circuit as described in claim 1-6 is arbitrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621157758.7U CN206132888U (en) | 2016-10-25 | 2016-10-25 | Three-phase drive plate fault determination circuit and three-phase drive plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621157758.7U CN206132888U (en) | 2016-10-25 | 2016-10-25 | Three-phase drive plate fault determination circuit and three-phase drive plate |
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| Publication Number | Publication Date |
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| CN206132888U true CN206132888U (en) | 2017-04-26 |
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| CN201621157758.7U Withdrawn - After Issue CN206132888U (en) | 2016-10-25 | 2016-10-25 | Three-phase drive plate fault determination circuit and three-phase drive plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526361A (en) * | 2016-10-25 | 2017-03-22 | 珠海格力电器股份有限公司 | Three-phase drive plate fault determination circuit and three-phase drive plate |
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2016
- 2016-10-25 CN CN201621157758.7U patent/CN206132888U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526361A (en) * | 2016-10-25 | 2017-03-22 | 珠海格力电器股份有限公司 | Three-phase drive plate fault determination circuit and three-phase drive plate |
| CN106526361B (en) * | 2016-10-25 | 2024-02-02 | 珠海格力电器股份有限公司 | Three-phase driving plate fault determining circuit and three-phase driving plate |
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