KR20170017839A - Magnetic sensor integrated circuit and motor assembly - Google Patents

Abstract

A magnetic sensor integrated circuit (400) includes an electronic circuit placed on a semiconductor substrate and input ports (A1, A2) and a first output port and a second output port (B1, B2) extending to the outside from a housing. The electronic circuit includes a magnetic field detection circuit (20) and an output control circuit (30). The magnetic field detection circuit (20) is configured to detect an external magnetic field and generate magnetic field detection information. The first output port (B1) outputs the magnetic field detection information to the outside of the housing. The output control circuit (30) is configured to control the integrated circuit (400) based on the magnetic field detection information at the least such that the integrated circuit (400) is operated in at least one of first and second states. In the first state, a current flows to the outside of the integrated circuit from the second output port (B2). In the second state, the current flows from the outside of the integrated circuit to the second output port (B2).

Description

MAGNETIC SENSOR INTEGRATED CIRCUIT AND MOTOR ASSEMBLY BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a magnetic field detection technique.

BACKGROUND OF THE INVENTION [0002] Magnetic sensors are widely used to measure physical parameters such as current, position and direction by detecting magnetic field strength in modern industrial societies and electronic products. The motor industry is a major application of magnetic sensors. The magnetic sensor is used to sense the pole position of the rotor in the electric motor.

According to the prior art, a magnetic sensor can generally output only a magnetic field detection result, and additional peripheral circuits are required to process the actual magnetic field detection result, so that the entire circuit is expensive and poor in reliability.

In one aspect, a magnetic sensor integrated circuit is provided in accordance with an embodiment of the present invention. A magnetic sensor integrated circuit includes a housing, a semiconductor substrate disposed in the housing, an electronic circuit disposed on the semiconductor substrate, and an input port extending outwardly from the housing, a first output port and a second output port, Electronic circuitry:

A magnetic field detection circuit configured to detect an external magnetic field and generate magnetic field detection information, the first output port coupled to a magnetic field detection circuit for outputting magnetic field detection information to the outside of the housing; And

A first state in which a current flows from the second output port to the outside of the integrated circuit at least based on the magnetic field detection information and a second state in which a current flows from the outside of the integrated circuit to the second output port And an output control circuit configured to control the integrated circuit.

Preferably, the magnetic field detection circuit comprises:

A magnetic field detecting element configured to detect an external magnetic field and generate an electric signal;

A signal processing unit configured to amplify and descramble the electrical signal; And

A conversion unit configured to convert the amplified and descrambled electrical signal into magnetic field detection information, the output terminal of the conversion unit being connected to the output control circuit and the first output port.

Preferably, the magnetic field detection information may be a switched digital signal.

Advantageously, the integrated circuit may include at least four ports extending outwardly from the housing.

Advantageously, the integrated circuit may comprise exactly four ports extending outwardly from the housing.

Preferably, the input port includes an input port configured to connect an external AC power source, and wherein the output control circuit is further configured to switch between at least a first state and a second state based on polarity and magnetic field detection information of the AC power source, To control the integrated circuit.

Preferably, the output control circuit includes a first switch and a second switch, wherein the first switch and the second output port are connected in a first current path, and the second switch and the second output port are connected in a first current path, Wherein the first switch and the second switch are selectively turned on based on the magnetic field detection information, wherein the first switch and the second switch are connected in a second current path having a direction opposite to the first current path.

Preferably, the output control circuit includes a first current path through which current flows out of the second output port, a second current path through which current flows from the second output port, and a second current path through which one of the first current path and the second current path, And the switch is configured to control the first current path and the second current path to be selectively turned on based on the magnetic field detection information output from the magnetic field detection circuit.

Advantageously, the output control circuit is configured to: control the AC power supply when the AC power source is in a positive half cycle and the external magnetic field is of a first polarity, or when the AC power source is in a negative half cycle and the external magnetic field is of a second polarity opposite to the first polarity If the AC power source is in the positive half cycle and the external magnetic field is in the second polarity, or if the AC power source is in the negative half cycle and the external magnetic field is in the first And to control the load current not to flow through the second output port when the polarity is polarity.

Advantageously, the input port comprises a first input port and a second input port configured to connect an external AC power source, and wherein the integrated circuit is further configured to convert an AC voltage output from the external power supply to a DC voltage And further includes a rectifying circuit.

Preferably, the integrated circuit may further comprise a voltage regulating circuit configured to store the first voltage output from the rectifying circuit as a second voltage, wherein the first voltage is a supply voltage of the output control circuit, The second voltage is a supply voltage of the magnetic field detection circuit, and the average of the first voltage is greater than the average of the second voltage.

In another aspect, there is provided a motor assembly in accordance with an embodiment of the present invention. The motor assembly includes a motor and a motor drive circuit, and the motor drive circuit includes the magnetic sensor integrated circuit described above.

Preferably, the motor drive circuit further comprises a bi-directional switch connected in series with the motor at both ends of the external AC power supply, and the second output port of the magnetic sensor integrated circuit is connected to the control terminal of the bi-directional switch.

Preferably, the motor may comprise a stator and a permanent rotor, the stator may comprise a stator core and a single-phase winding wound on the stator core.

Advantageously, the motor assembly further comprises a voltage dropper configured to reduce an output voltage of the AC power supply and provide a reduced voltage of the AC power supply to the magnetic sensor integrated circuit.

Preferably, the magnetic sensor integrated circuit is configured such that when the AC power source is in a positive half cycle and the magnetic field of the permanent rotor is of a first polarity, or when the AC power source is in a negative half cycle and the magnetic field of the permanent rotor is opposite to the first polarity Directional switch is turned on when the AC power source is in the negative half cycle and the magnetic field of the permanent rotor is in the first polarity or when the AC power source is in the positive half cycle and the permanent And to control the bi-directional switch to be turned off when the magnetic field of the first polarity is the second polarity.

Preferably, the magnetic sensor integrated circuit controls the current to flow from the integrated circuit to the bi-directional switch when the signal output from the AC power supply is in the positive half cycle and the magnetic field of the permanent rotor is the first polarity, And to control current to flow from the bidirectional switch to the integrated circuit when the signal output from the AC power source is in a negative half cycle and the magnetic field of the permanent rotor is of a second polarity.

The function of the existing magnetic sensor is extended together with the magnetic sensor integrated circuit according to the present invention. The total circuit cost is reduced, and the circuit reliability is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a semiconductor device according to an embodiment of the present invention; FIG. Obviously, the drawings in the following description are merely illustrative of some embodiments of the invention. Those skilled in the art will appreciate that other drawings can be obtained without any creative work in these drawings.
1 is a schematic structural view of a magnetic sensor integrated circuit according to an embodiment of the present invention.
2 is a schematic structural view of an electronic circuit in a magnetic sensor integrated circuit according to an embodiment of the present invention.
3 is a schematic structural diagram of an output control circuit in a magnetic sensor integrated circuit according to an embodiment of the present invention.
4 is a schematic structural diagram of an output control circuit in a magnetic sensor integrated circuit according to an embodiment of the present invention.
5 is a schematic structural view of an output control circuit in a magnetic sensor integrated circuit according to an embodiment of the present invention.
5A is a schematic structural diagram of an output control circuit in a magnetic sensor integrated circuit according to an embodiment of the present invention.
6 is a schematic structural view of a magnetic sensor integrated circuit according to an embodiment of the present invention.
7 is a schematic structural view of a rectifier circuit in a magnetic sensor integrated circuit according to an embodiment of the present invention.
8 is a diagram of a specific transition of the rectifier circuit in Fig.
9 is a schematic structural view of a magnetic field detection circuit in a magnetic sensor integrated circuit according to an embodiment of the present invention.
10 is a schematic structural view of a motor assembly according to an embodiment of the present invention.
11 is a schematic structural view of a motor in a motor assembly according to an embodiment of the present invention.

The technical solution according to the embodiment of the present invention is clearly and completely described in conjunction with the drawings in the following embodiments. Obviously, the described embodiments are only some of rather than all embodiments of the invention. Other embodiments can be obtained by those skilled in the art without any creative work based on embodiments falling within the scope of the claims of the invention.

For a fuller understanding of the present invention, more specific details are set forth below, but may be implemented in different ways than those described herein. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention.

Here, the magnetic sensor integrated circuit according to the embodiment of the present invention will be described taking a magnetic sensor integrated circuit applied to a motor as an example.

1, a magnetic sensor integrated circuit is provided according to an embodiment of the present invention. The magnetic sensor integrated circuit includes a housing 2, a semiconductor substrate (not shown) disposed in the housing 2, electronic circuits disposed on the semiconductor substrate, and input ports A1 and A2 extending from the housing 2. [ A first output port B1, and a second output port B2. Electronic circuitry:

A magnetic field detection circuit (20) configured to detect an external magnetic field and generate magnetic field detection information, the first output port (B1) being connected to a magnetic field detection circuit (20) for outputting magnetic field detection information to the outside of the housing; And

A first state in which a current flows from the second output port (B2) to the outside of the integrated circuit at least based on the magnetic field detection information, and a second state in which a current flows from the outside of the integrated circuit to the second output port (B2) And an output control circuit (30) configured to control the integrated circuit to operate in at least one of the states.

In the preferred embodiment of the present invention on the basis of the above embodiment, the output control circuit 30 controls the first state in which the current flows from the second output port B2 to the outside of the integrated circuit based on at least the magnetic field detection information, Between the second state in which the first output port of the integrated circuit flows from the exterior of the integrated circuit to the second output port. In some cases, both the outflow current and the inrush current flow through the rectifying circuit, and the invention is not limited to this.

In an embodiment of the present invention, switching of the magnetic sensor integrated circuit between the first state and the second state is not limited to the case where the magnetic sensor integrated circuit switches the state as soon as the other state ends, And waiting for a predetermined interval time to switch to a state after the state end. In the preferred embodiment, there is no output at the output port of the magnetic sensor integrated circuit within the interval time for switching between the two states.

In an embodiment of the present invention, as shown in FIG. 2, the electronic circuit further includes a first power source 40 and a second power source 50. The magnetic field detection circuit 20 is powered by the first power source 40 and the output control circuit 30 is powered from the second power source 50 which is different from the first power source 40. [ Preferably, the average of the output voltage of the first power source 40 is less than the output voltage of the second power source 50. [ The magnetic field detection circuit 20 is powered by a power source having low power consumption, which can reduce the power consumption of the integrated circuit. The output control circuit 30 is powered by a power supply having a high power consumption, which can control the second output port to provide a high load current to ensure sufficient driving capability of the integrated circuit.

In the embodiment of the present invention based on the above-described embodiment, the output control circuit 30 includes a first switch and a second switch. The first switch and the second output port are connected to a first current path and the second switch and the second output port are connected to a second current path having an opposite direction to the first current path, Is selectively turned on based on the magnetic field detection information. Preferably, the first switch may be a tide, and the second switch may be a triode or diode, as the case may be, but is not limited thereto.

In a specific embodiment of the invention, the first switch 31 is turned on at a low level and the second switch 32 is turned on at a high level, as shown in Fig. The first switch 31 and the second output port B2 are connected to a first current path. The second switch 32 and the second output port B2 are connected to a second current path. The control terminals of the first switch 31 and the second switch 32 are both connected to the magnetic field detection circuit 20. The current input terminal of the first switch 31 is connected to a high voltage (for example, a DC power source), the current output terminal of the first switch 31 is connected to the current input terminal of the second switch 32, 2 switch 32 is connected to a low voltage (for example, ground). When the magnetic field detection information output from the magnetic field detection circuit 20 is low level, the first switch 31 is turned on and the second switch 32 is turned off so that the load current comes out of the high voltage end, (31) and the second output port (B2). When the magnetic field detection information output from the magnetic field detection circuit 20 is at a high level, the second switch 32 is turned on and the first switch 31 is turned off so that the load current flows from the outside of the integrated circuit to the second And flows through the switch 32 to the second output port B2.

4, the first switch 31 is a switch transistor that is turned on at a high level, the second switch 32 is a unidirectional diode, and the control terminal of the first switch The cathode of the second switch 32 is connected to the magnetic field detection circuit 20. The current input terminal of the first switch 31 is connected to the second power source 50 and the anode of the second switch 32 and the current output terminal of the first switch 31 are both connected to the second output port B2. Lt; / RTI > The first switch 31 and the second output port B2 are connected to the first connection path and the second output port B2 and the second switch 32 and the magnetic field detection circuit 20 are connected to the second current path . When the magnetic field detection information outputted from the magnetic field detection circuit 20 is at a high level, the first switch 31 is turned on and the second switch 32 is turned off so that the load current flows from the second power source 50 And flows through the first switch 31 and the second output port B2. When the magnetic field detection information outputted from the magnetic field detection circuit 20 is low level, the second switch 32 is turned on and the first switch 31 is turned off so that the load current flows from the outside of the integrated circuit to the second And flows through the switch 32 to the second output port B2. In another embodiment of the present invention, the first switch 31 and the second switch 32 may have different structures, but are not limited thereto.

In another embodiment of the present invention, the output control circuit 30 includes a first current path through which current flows out of the output port, a second current path through which current flows from the output port, and a second current path, Lt; / RTI > The switch is configured to control the first current path and the second current path to be selectively turned on based on the magnetic field detection information output from the magnetic field detection circuit. Preferably, none of the first current path and the second current path has a switch.

5, for a particular transition, the output control circuit 30 includes a unidirectional switch 33. The unidirectional switch 33 and the second output port B2 are connected to the first current path and the current input terminal of the unidirectional switch can be connected to the output terminal of the magnetic field detection circuit 20, The output terminal may be connected to the second current path having a direction opposite to the first current path through the resistor R1 and the second output port B2. The unidirectional switch 33 is turned on when the magnetic field induction signal is at the high level, and the load current flows out through the unidirectional switch 33 and the second output port B2. The unidirectional switch 33 is turned off when the magnetic field induction signal is at the low level so that the load current flows from the outside of the integrated circuit to the second output port B2 through the resistor R1 and the magnetic field detection circuit 20. [ Alternatively, the resistor R1 in the second current path may be replaced by another unidirectional switch connected in reverse parallel to the unidirectional switch 33. [ In this way, the load current flowing out and flowing through the output port can be balanced.

5a, the output control circuit 30 includes diodes D1 and D2 connected in series in reverse direction between the output terminal of the magnetic field detection circuit 20 and the output port Pout, a diode connected in series A resistor R1 connected in parallel to the diodes D1 and D2 and a resistor R2 connected between the common terminal of the diodes D1 and D2 and the power supply Vcc. The cathode of the diode D1 is connected to the output terminal of the magnetic field detection circuit 20. [ The power supply Vcc may be connected to the voltage output terminal of the rectifying circuit. The diode D1 is controlled based on the magnetic field detection information. When the magnetic field detection information is at a high level, the diode D1 is turned off, and the load current flows out of the output port Pout through the resistor R2 and the diode D2. When the magnetic field detection information is at a low level, the load current flows from the outside of the integrated circuit to the output port Pout through the resistor R1 and the magnetic field detection circuit 20. [

In an embodiment of the present invention based on any of the above embodiments, the input port includes a first input port A1 and a second input port A2 configured to couple external AC power to the magnetic sensor integrated circuit And the output control circuit controls the integrated circuit to switch at least between the first state and the second state based on the polarity of the AC power and the magnetic field detection information. Optionally, the magnetic field detection circuit 20 and the output control circuit 30 are powered by the same single power supply.

In an embodiment of the present invention based on any of the embodiments described above, the output control circuit 30 is configured such that the AC power source is in a positive half cycle and the external magnetic field is of a first polarity by the magnetic field detection circuit 20 Or when the AC power source is in a negative half cycle and the external magnetic field is detected by the magnetic field detection circuit 20 to have a second polarity opposite to the first polarity, control is performed so that the load current flows through the second output port Or when the AC power source is in a positive half cycle and the external magnetic field is detected as being of a second polarity by the magnetic field detection circuit, or when the AC power source is in a negative half cycle and the external magnetic field is reversed by the magnetic field detection circuit to the second polarity To control the load current to flow through the second output port when detected as having a first polarity . In the case where the AC power source is in the positive half cycle and the external magnetic field has the first polarity or when the AC power source is in the negative half cycle and the external magnetic field has the second polarity, Or may only flow for some time in one of the two cases.

In an embodiment of the present invention based on the above described embodiment, the input port may include a first input port A1 and a second input port A2 for coupling external AC power to the magnetic integrated circuit. In the detailed description, the connection between the input port and the external power source includes, in some cases, the case where the input port and the external load are connected in series across the external AC power source as well as the case where the input port is directly connected to the external AC power source, It does not. As shown in FIG. 6, in an embodiment of the present invention, the integrated circuit further includes a rectifying circuit 60 configured to convert the AC current output from the external AC power supply 70 to DC.

In the disclosed embodiment, the rectifying circuit 60 is connected to an output control circuit 30, and the output control circuit 30 is configured such that, based at least on the magnetic field detection information, the integrated circuit is configured such that current flows from the second output port to the outside of the integrated circuit And a second state in which the current flows from the exterior of the integrated circuit to the second output port.

In a preferred embodiment of the present invention based on the above described embodiment, the integrated circuit further includes a voltage regulation circuit 80 disposed between the rectification circuit 60 and the magnetic field detection circuit 20. [ The rectifying circuit 60 may serve as the second power source 50 and the voltage regulating circuit 80 may serve as the first power source 40. The voltage regulating circuit 80 may serve as the first power source 40, 2 < / RTI > voltage. The second voltage is the supply voltage of the magnetic field detection circuit 20 and the first voltage is the supply voltage of the output control circuit 30 and the average of the first voltage is greater than the average of the second voltage, And ensures sufficient driving capability of the integrated circuit.

7, rectifier circuit 60 includes a voltage stabilizing unit 62 connected to the output terminals of a full-wave bridge rectifier 61 and a full-wave bridge rectifier 61. In this embodiment, The wave bridge rectifier 61 is configured so that the alternating current output from the AC power source 70 is converted to direct current and the voltage stabilizing unit 62 is configured to stabilize the direct current output from the wave bridge rectifier 61 within a predetermined range .

Fig. 8 shows a specific transition of the rectifying circuit 60. Fig. The voltage stabilizing unit 62 includes a voltage stabilizing diode 621 connected between the two output terminals of the full-wave bridge rectifier 61. The wave bridge rectifier 61 includes a first diode 611 and a second diode 612 connected in series and a third diode 613 and a fourth diode 614 connected in series. The common terminals of the first diode 611 and the second diode 612 are electrically connected to the first input port VAC + and the common terminals of the third diode 613 and the fourth diode 614 are electrically connected to the second input And is electrically connected to the port VAC-.

The input terminal of the first diode 611 is electrically connected to the input terminal of the third diode 613 to form the ground output of the full wave bridge rectifier and the output terminal of the second diode 612 is connected to the fourth diode 614, The voltage stabilizing diode 621 forms a voltage output terminal VDD of the full wave bridge rectifier which is connected to the common terminal of the second diode 612 and the fourth diode 614, (611) and the third diode (613). It should be noted that the power terminal of the output control circuit 30 can be connected to the voltage output terminal of the full-wave bridge rectifier 61.

In an embodiment based on any of the foregoing embodiments, as shown in Fig. 9, the magnetic field detection circuit 20 comprises: a magnetic field detection element 21 configured to detect an external magnetic field and convert the same into an electrical signal; A signal processing unit (22) configured to amplify and descramble the electrical signal; And an analog-to-digital conversion unit (23) configured to convert the amplified and descrambled electrical signal into magnetic field detection information. For applications requiring only the recognition of the polarity of the external magnetic field, the magnetic field detection information may be a switch type digital signal. Preferably, the magnetic field sensing element 21 may be a hole plate. In the embodiment, the output terminal of the analog-to-digital conversion unit 23 is connected to the output control circuit 30 and the first output port B1. The output control circuit 30 can process the magnetic field detection information inside the magnetic sensor integrated circuit and can generate the desired output at the second output port B2 and can detect the magnetic field detection output from the first output port B1 Information may be provided for the external circuit of the magnetic sensor integrated circuit.

In a preferred embodiment, when the input port comprises a first input port and a second input port configured to couple an external AC power source to the magnetic sensor integrated circuit, the frequency of occurrence of the first state or second state is to be understood It is proportional to the frequency of the AC power source, which is not limited to this description.

The magnetic sensor integrated circuit according to the present invention is described in connection with a specific application.

As shown in FIG. 10, a motor assembly is provided in accordance with an embodiment of the present invention. The motor assembly comprises: a motor (200) powered by an AC power supply (100); A bidirectional switch 300 connected in series with the motor 200; And a magnetic sensor integrated circuit 400 according to one of the above embodiments. And the second output port B2 of the magnetic sensor integrated circuit 400 is connected to the control terminal of the bidirectional switch 300. [ Preferably, bidirectional switch 300 may be a triode AC semiconductor switch TRIAC. The bi-directional switch may be implemented with other suitable switches, for example two silicon controlled rectifiers connected in reverse-parallel fashion and two silicon controlled rectifiers in a predetermined manner, based on the output signals from the output ports of the magnetic sensor integrated circuit It will be appreciated that the control circuitry may be configured to control the control circuitry. Preferably, the motor assembly further comprises a voltage drop circuit (500) configured to reduce the output voltage of the AC power supply (100) and provide a reduced voltage to the magnetic sensor integrated circuit (400). The magnetic sensor integrated circuit 400 is disposed in the vicinity of the rotor of the motor 200 to sense a change in the magnetic field of the rotor.

In a specific embodiment based on the above described embodiments, the motor is a synchronous motor, the magnetic sensor integrated circuit does not apply only to the synchronous motor, but also to other suitable types of permanent motors such as a DC brushless motor. As shown in Fig. 11, the synchronous motor includes a stator and a rotor 11 rotatable with respect to the stator. The stator includes a stator core (12) and a stator winding (16) wound on the stator core (12). The stator core 12 may be made of a soft magnetic material such as pure steel, cast steel, electric steel and silicon steel. The rotor 11 includes a permanent magnet. The rotor 11 operates at a constant rotational speed of 60 f / p revs / min during a steady state phase when the stator winding 16 is connected in series with an AC power source, where f is the frequency of the AC power source and p is The number of pole pairs of the rotor. In an embodiment, the stator core 12 includes two poles 14 that are opposite to each other. Each pole 14 includes a pole arc 15 whose outer surface is opposite pole arc 15 and which is substantially uniform between the outer surface of rotor 11 and pole arc 15 An air gap is formed. A "substantially uniform air gap" in the present invention means that a uniform air gap 13 is formed in most of the space between the stator and the rotor and a nonuniform air gap is formed in a small portion of the space between the stator and the rotor it means. Preferably, the concave starting groove 17 is disposed in the pole arc 15 of the pole of the stator, and a part of the pole arc 15 rather than the starting groove 17 may be concentric with the rotor. In the above-described configuration, a non-uniform magnetic field can be formed, and the pole axis S1 of the rotor has an inclined angle with respect to the central axis S2 of the poles of the stator when the rotor is at rest, The motor may have a starting torque every time the motor is energized. Specifically, "pole axis S1 of rotor" refers to the boundary between two magnetic poles having different polarities, and "center axis S2 of pole 14 of stator 14" Quot;). ≪ / RTI > In an embodiment, both the stator and the rotor may have more stimuli such as four or six stimuli in other embodiments. Other types of nonuniform air gaps may alternatively be formed between the rotor and the stator.

In the embodiment based on the above embodiment, the magnetic sensor integrated circuit 30 is configured such that the AC power supply 100 is in the positive half cycle and the magnetic field of the permanent rotor is the first polarity by the magnetic field detection circuit 20 Or when the AC power supply 100 is in a negative half cycle and the magnetic field of the permanent rotor is detected by the magnetic field detection circuit 20 to have a second polarity opposite to the first polarity, When the AC power supply 100 is in the negative half cycle and the magnetic field of the permanent rotor is detected by the magnetic field detection circuit 20 to have the first polarity, (100) is in a positive half cycle and the magnetic field of the permanent rotor is detected by the magnetic field detection circuit (20) to have a second polarity opposite to the first polarity, the bi-directional switch It is arranged to control.

Preferably, the output control circuit 30 determines that the signal output from the AC power supply 100 is in a positive half cycle and that the magnetic field of the permanent rotor is detected by the magnetic field detection circuit 20 to have the first polarity Directional switch 300 or the signal output from the AC power supply 100 is in a negative half cycle and the magnetic field of the permanent rotor is applied by the magnetic field detection circuit 20 to the first polarity Directional switch 300 to the integrated circuit when detected as having a second polarity opposite to the first polarity. If the permanent rotor has the first polarity and the AC power source is in the positive half cycle or if the permanent rotor has the second polarity and the AC power source is in the negative half cycle, And a case where there is a load current flowing therethrough during a period and a load current flowing through only a part of the time is present.

In the preferred embodiment of the present invention, bidirectional switch 300 is implemented as a triode AC semiconductor switch TRIAC, rectifier circuit 60 is implemented as a circuit as shown in Fig. 8, As shown in FIG. The current input terminal of the first switch 31 in the output control circuit 30 is connected to the voltage output terminal of the full wave bridge rectifier 61 and the current output terminal of the second switch 32 is connected to the full wave bridge rectifier 61, To the ground output terminal. When the signal output from the AC power source 100 is in a positive half cycle and the magnetic field detection circuit 20 outputs a low level, the first switch 31 in the output control circuit 30 is turned on, The switch 32 is turned off and the current flows from the second output port to the bidirectional switch 300 and vice versa to the AC power source 100, the motor 200, the first The voltage drop circuit, the output terminal of the second diode 612 of the full-wave bridge rectifier 61, and the first switch 31 of the output control circuit 30 in this order. When the TRIAC 300 is turned on, the serial branch formed by the voltage drop circuit 500 and the magnetic sensor integrated circuit 400 is short-circuited, and the magnetic sensor integrated circuit 400 stops outputting because there is no voltage supply , The TRIAC 300 is still on because the current flowing between its two anodes is high (higher than its hold current) when there is no drive current between the control electrode and its first anode electrode. The first switch 31 is turned off and the second switch 32 is turned on when the signal input by the AC power source 100 is in the negative half cycle and the magnetic field detection circuit 20 outputs a high level, And the current flows from the bidirectional switch 300 to the second output port through the second switch 32 of the output control circuit 30, the ground output terminal of the full-wave bridge rectifier 61 and the first diode 611, 400, the motor 200 and the AC power supply 100 again. Similarly, when the TRIAC 300 is turned on, the magnetic sensor integrated circuit 400 stops its output to be short-circuited, and TRIAC is still ON. When the signal output from the AC power supply 100 is in the positive half cycle and the magnetic field detection circuit 20 outputs the high level or when the signal output from the AC power supply 100 is in the negative half cycle and the magnetic field detection circuit 20 output a low level, the first switch 31 and the second switch 32 in the output control circuit 30 are both turned off and the TRIAC 300 is turned off. In this manner, the output control circuit 30 controls the integrated circuit to control the bidirectional switch 300 to be switched between a turn-on state and a turn-off state in a predetermined manner, based on the polarity and magnetic field detection information of the AC power supply 100 So as to control the energy supply mode of the stator winding 16 so that the changed magnetic field generated by the stator aligns the position of the magnetic field of the rotor and causes the rotor to rotate in a single direction, So that the rotor rotates in the fixed direction every time energy is supplied.

A magnetic sensor integrated circuit according to an embodiment of the present invention includes at least four ports extending from a housing including an input port, a first output port, and a second output port. More preferably, the magnetic sensor integrated circuit according to the embodiment of the present invention includes exactly four ports: a first input port, a second input port, a first output port, and a second output port.

In a motor assembly according to another embodiment of the present invention, the motor and the bidirectional switch may be connected in series across the external AC power source, and the first series branch formed by the motor and the bidirectional switch may be connected by a voltage drop circuit and a magnetic sensor integrated circuit And connected in parallel to the second serial branch formed. The output port of the magnetic sensor integrated circuit is coupled to a bi-directional switch to control the bi-directional switch to switch between a turn-on state and a turn-off state in a predetermined manner to control the energy supply mode of the stator windings.

The motor assembly according to an embodiment of the present invention can be applied to, but not limited to, a pump, a fan, a household appliance, and a vehicle, wherein the household appliance may be, for example, a washing machine, a dishwasher, a range hood or an exhaust fan.

The application field of the integrated circuit according to the present invention is described in the embodiment according to the present invention as being applied to the motor as an example of an integrated circuit, but the present invention is not limited thereto.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some portions of the present disclosure are described in a progressive manner, each of which emphasizes differences from the others, and the same or similar portions of the components may refer to one another.

Relational terms such as " first ", "second ", and the like are used only to distinguish one entity or action from another, rather than requiring or suggesting an actual relationship or order existing between entities or operations. Furthermore, the terms " include, "or other variations are not intended to be exclusive, so that a process, method, article, or apparatus that comprises a plurality of elements includes not only the elements disclosed, And the like, and also includes any inherent element (s) of a process, method, article, or apparatus. Unless otherwise specifically stated, the phrase "including a" Other similar elements are not excluded.

Those skilled in the art can implement or use the present invention as long as the description of the embodiments is provided herein. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features described herein.

Claims (9)

1. A magnetic sensor integrated circuit comprising:
housing,
A semiconductor substrate disposed in the housing,
An electronic circuit disposed on the semiconductor substrate, and
An input port extending outwardly from the housing, a first output port and a second output port
The electronic circuit comprising:
A magnetic field detection circuit configured to detect an external magnetic field and generate magnetic field detection information, the first output port coupled to a magnetic field detection circuit for outputting magnetic field detection information to the outside of the housing; And
A first state in which a current flows from the second output port to the outside of the integrated circuit at least based on the magnetic field detection information and a second state in which a current flows from the outside of the integrated circuit to the second output port An output control circuit configured to control the integrated circuit;
And the magnetic sensor integrated circuit. The magnetic field detection circuit according to claim 1, wherein the magnetic field detection circuit comprises:
A magnetic field detecting element configured to detect an external magnetic field and generate an electric signal;
A signal processing unit configured to amplify and descramble the electrical signal; And
A conversion unit configured to convert an amplified and descrambled electrical signal into magnetic field detection information, the output terminal of the conversion unit being connected to the output control circuit and the first output port,
And a magnetic sensor integrated circuit. The method according to claim 1,
The input port includes an input port configured to connect an alternating current (AC) power source,
Wherein the output control circuit is configured to control the integrated circuit to switch between at least a first state and a second state based on polarity and magnetic field detection information of the AC power source. The power supply circuit according to any one of claims 1 to 3, wherein the output control circuit includes a first switch and a second switch, the first switch and the second output port being connected in a first current path, Switch and the second output port are connected in a second current path having a direction opposite to the first current path and the first switch and the second switch are selectively turned on based on the magnetic field detection information , Magnetic sensor integrated circuit. The output control circuit according to any one of claims 1 to 3, wherein the output control circuit includes a first current path through which current flows from the second output port, a second current path through which current flows from the second output port, And a switch coupled to one of the second current paths, wherein the switch is configured to control the first current path and the second current path to be selectively turned on based on the magnetic field detection information output from the magnetic field detection circuit A magnetic sensor integrated circuit. 4. The output control circuit according to claim 3,
When the AC power source is in the positive half cycle and the external magnetic field is the first polarity or when the AC power source is in the negative half cycle and the external magnetic field is the second polarity opposite to the first polarity, , And also controls
To control the load current to flow through the second output port when the AC power source is in the positive half cycle and the external magnetic field is the second polarity or when the AC power source is in the negative half cycle and the external magnetic field is the first polarity A magnetic sensor integrated circuit. The method according to claim 1 or 2,
The input port includes a first input port and a second input port configured to connect an external AC power source,
Wherein the integrated circuit further comprises a rectifying circuit configured to convert an AC voltage output from the external power supply to a DC voltage. As a motor assembly:
motor; And
A motor drive circuit including the magnetic sensor integrated circuit according to claim 1
≪ / RTI > The method of claim 8,
The motor drive circuit further comprises a bidirectional switch connected in series with the motor at both ends of the external AC power supply,
And the second output port of the magnetic sensor integrated circuit is connected to a control terminal of a bi-directional switch.

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