JP2017067760A - Magnetic sensor integrated circuit and motor component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic sensor integrated circuit and a motor component.SOLUTION: A magnetic sensor integrated circuit (400) and a motor component are provided. The integrated circuit comprises at least one input port (A1, A2), an output port (Pout), a magnetic field detection circuit (20), and an output control circuit (30). The magnetic field detection circuit (20) detects an external magnetic field and outputs magnetic field detection information. The output control circuit (30) enables, at least on the basis of the magnetic field detection information, the integrated circuit to switch at least between a first state, in which a current flows from the output port (Pout) to an outside of the integrated circuit, and a second state, in which a current flows from the outside of the integrated circuit to the output port (Pout).SELECTED DRAWING: Figure 1

Description

  The present invention relates to the field of magnetic field detection technology.

  Magnetic sensors are widely used in modern industrial and electronic products to measure physical parameters such as current, position and direction by sensing magnetic field strength. The motor industry is an important field of application for magnetic sensors. The magnetic sensor integrated circuit can be used to detect the polarity position of the rotor in the electric motor.

  In the prior art, magnetic sensors generally can only output magnetic field detection results, and in certain applications for processing magnetic field detection results, additional peripheral circuits are required, and therefore the entire circuit Cost increases and reliability decreases.

In one aspect, an embodiment of the present disclosure provides a magnetic sensor integrated circuit. Magnetic sensor integrated circuit
At least one input port and output port;
A magnetic field detection circuit configured to detect an external magnetic field and corresponding output magnetic field detection information;
Based at least on the magnetic field detection information, the integrated circuit is at least between a first state in which current flows from the output port to the outside of the integrated circuit and a second state in which current flows from the outside of the integrated circuit to the output port. An output control circuit configured to allow switching;
including.

  Preferably, the magnetic field detection circuit can be powered by a first power source, and the output control circuit can be powered by a second power source different from the first power source.

  Preferably, the second power source can be a variable amplitude power source.

  Preferably, the first power source may be a constant amplitude DC power source.

  Preferably, the average value of the output voltage of the first power supply is lower than the average value of the output voltage of the second power supply.

  Preferably, the at least one input port can include an input port configured to connect to an external AC power source, and the output control circuit is configured so that the integrated circuit is at least based on the polarity of the AC power source and the magnetic field detection information. It is configured to allow switching between a first state and the second state.

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

  Preferably, the first switch is a triode and the second switch is a diode or a triode.

  Preferably, the output control circuit is connected to one of a first current path from which current flows from the output port, a second current path from which current flows from the output port, and one of the first current path and the second current path. The switch is controlled by the magnetic field detection information output by the magnetic field detection circuit, and allows the first current path and the second current path to be selectively turned on.

  Preferably, no switch is provided on the other of the first current path and the second current path.

  Preferably, in the output control circuit, when the AC power source is in a positive half cycle and the polarity of the external magnetic field detected by the magnetic field detection circuit is the first polarity, or the AC power source is in a negative half cycle, And when the polarity of the external magnetic field detected by the magnetic field detection circuit is a second polarity opposite to the first polarity, the output port is configured to control to have a load current flowing therethrough; and When the AC power source is in the positive half cycle and the polarity of the external magnetic field is the second polarity, or the AC power source is in the negative half cycle and the polarity of the external magnetic field is the first polarity, The output port is configured to be controlled so as not to have a load current flowing therethrough.

  Preferably, the magnetic field detection circuit has the same power source as the output control circuit.

  Preferably, the at least one input port includes a first input port and a second input port configured to be connected to an external AC power source, and the integrated circuit converts the AC output from the external AC power source to DC. A rectifier circuit configured to convert is further included.

  Preferably, the integrated circuit further includes a voltage regulator circuit configured to adjust the first voltage output by the rectifier circuit to a second voltage, wherein the second voltage is supplied to the magnetic field detection circuit. The first voltage is supplied to the output control circuit, and the average value of the first voltage is higher than the average value of the second voltage.

Preferably, the magnetic field detection circuit is
A magnetic field sensing element configured to detect an external magnetic field and generate an electrical signal;
A signal processing unit configured to amplify and de-scramble the electrical signal;
An analog-to-digital conversion unit configured to convert the amplified and descrambled electrical signal into magnetic field detection information that is an on-off digital signal;
including.

  Preferably, the input port can include a first input port and a second input port both configured to connect to an external AC power source, and the frequency of occurrence of the first state or the second state is , Proportional to the frequency of the AC power supply.

  In another aspect, a motor component is provided. The motor component 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 includes a bidirectional switch in series with the motor between two terminals of the external AC power supply, and an output port of the magnetic sensor integrated circuit is connected to a control terminal of the bidirectional switch.

  Preferably, the motor includes a stator and a permanent magnet rotor, and the stator includes a stator core and a single-phase winding wound around the stator core.

  Preferably, the motor component further includes a step-down regulator configured to reduce the voltage of the AC power source and provide the reduced voltage to the magnetic sensor integrated circuit.

  Preferably, in the output control circuit, when the AC power source is in a positive half cycle and the polarity of the permanent magnet rotor detected by the magnetic field detection circuit is the first polarity, or the AC power source is in a negative half cycle. If the polarity of the permanent magnet rotor detected by the magnetic field detection circuit is a second polarity opposite to the first polarity, the bidirectional switch is configured to be turned on, and the AC power source is negative. And when the polarity of the permanent magnet rotor is the first polarity, or when the AC power source is in the positive half cycle and the polarity of the permanent magnet rotor is the second polarity, both Configured to turn off the direction switch.

  Preferably, the output control circuit is configured such that when the signal output from the AC power supply is in a positive half cycle and the polarity of the permanent magnet rotor detected by the magnetic field detection circuit is the first polarity, the current is integrated circuit The signal output from the AC power supply is in a negative half cycle, and the polarity of the permanent magnet rotor is a second polarity opposite to the first polarity. In some cases, the current is configured to flow from the bidirectional switch to the integrated circuit.

  This magnetic sensor integrated circuit according to embodiments of the present disclosure extends the functionality of existing magnetic sensors, thereby reducing the overall cost associated with the circuit and increasing the reliability of the circuit.

  In order that the technical solutions according to the embodiments of the present disclosure or according to the prior art will become clearer, the drawings used to describe the embodiments of the present disclosure or the prior art will be briefly described as follows. It will be apparent that the drawings in the following description are merely illustrative of certain embodiments of the disclosure. Those skilled in the art can obtain other drawings from these drawings without any creative work.

1 is a structural diagram of a magnetic sensor integrated circuit according to an embodiment of the present disclosure. FIG. 1 is a structural diagram of a magnetic sensor integrated circuit according to an embodiment of the present disclosure. FIG. 2 is a structural diagram of an output control circuit in a magnetic sensor integrated circuit according to an embodiment of the present disclosure. FIG. 2 is a structural diagram of an output control circuit in a magnetic sensor integrated circuit according to an embodiment of the present disclosure. FIG. 2 is a structural diagram of an output control circuit in a magnetic field sensor integrated circuit according to an embodiment of the present disclosure. FIG. 2 is a structural diagram of an output control circuit in a magnetic field sensor integrated circuit according to an embodiment of the present disclosure. FIG. 1 is a structural diagram of a magnetic sensor integrated circuit according to an embodiment of the present disclosure. FIG. 1 is a structural diagram of a magnetic sensor integrated circuit according to an embodiment of the present disclosure. FIG. 2 is a structural diagram of a rectifier circuit in a magnetic sensor integrated circuit according to an embodiment of the present disclosure. FIG. 2 is a structural diagram of a magnetic field detection circuit in a magnetic sensor integrated circuit according to an embodiment of the present disclosure. FIG. FIG. 3 is a structural diagram of a motor component according to an embodiment of the present disclosure. FIG. 3 is a structural diagram of a motor in a motor component according to an embodiment of the present disclosure.

  The technical solutions according to the embodiments of the present disclosure are described below clearly and completely in conjunction with the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are very few rather than all of the embodiments of the present disclosure. Other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present disclosure fall within the protection scope of the present disclosure.

  Although more specific details are set forth in the following description for a thorough understanding of the present disclosure, the present disclosure may be further implemented in a manner different from that described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present disclosure, and therefore the present disclosure is not limited to the specific embodiments disclosed below.

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

  As shown in FIG. 1, an embodiment of the present disclosure provides a magnetic sensor integrated circuit. The magnetic sensor integrated circuit includes a shell 2, a semiconductor substrate (not shown) provided in the shell, input ports A1 and A2 and an output port Pout all extending from the shell, and an electronic circuit provided on the semiconductor substrate. Including. The electronic circuit detects the external magnetic field, and outputs the magnetic field detection information. The integrated circuit is configured to output at least the current from the output port to the outside of the integrated circuit based on at least the magnetic field detection information. And an output control circuit 30 configured to allow switching between a first state that flows to the second state and a second state in which current flows from outside the integrated circuit to the output port.

  According to embodiments of the present disclosure, the magnetic sensor integrated circuit switches operation between a first state and a second state, which is performed immediately after the magnetic sensor integrated circuit has finished one state. It should be noted that the present invention is not limited to the case of switching to this state, and includes the case where the magnetic sensor integrated circuit switches to the other state at a specific time interval after the end of one state. In a preferred embodiment, there is no output at the output port of the magnetic sensor integrated circuit at a particular time interval between the two states.

  Based on the above embodiment, in the embodiment of the present disclosure, as shown in FIG. 2, the magnetic field detection circuit 20 is supplied with power by the first power supply 40, and the output control circuit 30 is connected to the first power supply 40. Power is supplied by a different second power source 50. Note that in embodiments of the present disclosure, the second power supply 50 can be a variable amplitude power supply or a constant amplitude DC power supply. When the second power source 50 is a variable amplitude power source, the second power source 50 is preferably a variable amplitude DC power source, which is not limited in this disclosure as the case may be.

  Based on the above embodiment, in the embodiment of the present disclosure, the first power supply 40 has a constant amplitude so as to provide a stable drive signal to the magnetic field detection circuit 20 so that the magnetic field detection circuit 20 operates stably. DC power supply.

  Based on the above embodiment, in a preferred embodiment of the present disclosure, the average value of the output voltage of the first power supply 40 is lower than the average value of the output voltage of the second power supply 50. It should be noted that the magnetic field detection circuit 20 can be powered by a low power consumption power supply, thus reducing the power consumption of the integrated circuit. The output control circuit 30 is powered by a high power consumption power supply, and thus the output port provides a high load current to ensure that the integrated circuit has sufficient drive capability.

  Based on the above embodiment, in the embodiment of the present disclosure, the output control circuit 30 includes a first switch and a second switch, and the first switch is connected to the output port in the first current path. The second switch is connected to the output port in a second current path having a direction opposite to the direction of the first current path, and the first switch and the second switch are selected based on the magnetic field detection information Turned on automatically. Preferably, the first switch can be a triode and the second switch can be a triode or a diode, which is not limited in this disclosure as the case may be.

  Specifically, in the embodiment of the present disclosure, as illustrated in FIG. 3, the first switch 31 and the second switch 32 are a pair of complementary semiconductor switches. The first switch 31 is turned on at a low level, and the second switch 32 is turned on at a high level. The first switch 31 is connected to the output port Pout in the first current path, the second switch 32 is connected to the output port Pout in the second current path, and the control terminal of the first switch 31 and Both control terminals of the second switch 32 are connected to the magnetic field detection circuit 20, the current input terminal of the first switch 31 is connected to a high voltage terminal (for example, DC power supply), and the current of the first switch 31 is The output terminal is connected to the current input terminal of the second switch 32, and the current output terminal of the second switch 32 is connected to a low voltage terminal (for example, ground). When the magnetic field detection information output by the magnetic field detection circuit 20 is at a low level, the first switch 31 is turned on, the second switch 32 is turned off, and the load current is supplied from the high voltage terminal to the first switch 31. And flows out of the integrated circuit through the output port Pout. When the magnetic field detection information output by the magnetic field detection circuit 20 is at a high level, the second switch 32 is turned on, the first switch 31 is turned off, and the load current is sent from the outside of the integrated circuit to the output port Pout. Flow through the second switch 32. According to the embodiment shown in FIG. 3, the first switch 31 is a p-channel metal oxide semiconductor field effect transistor (P-channel MOSFET), and the second switch 32 is an n-channel metal oxide semiconductor field effect transistor (P-channel MOSFET). N-channel MOSFET). In other embodiments, the first switch and the second switch may be other types of semiconductor switches, such as other field effects, such as a junction field effect transistor (JFET) or a metal-semiconductor field effect transistor (MESFET). It should be understood that a transistor can be used.

  In another embodiment of the present disclosure, as shown in FIG. 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, The control terminal of the switch 31 and the cathode of the second switch 32 are connected to the magnetic field detection circuit 20. The current input terminal of the first switch 31 is connected to the second power supply 50, and the current output terminal of the first switch 31 and the anode of the second switch 32 are connected to the output port Pout. The first switch 31 is connected to the output port Pout in the first current path, and the output port Pout, the second switch 32, and the magnetic field detection circuit 20 are connected in the second current path. When the magnetic field detection information output by the magnetic field detection circuit 20 is at a high level, the first switch 31 is turned on, the second switch 32 is turned off, and the load current is supplied from the second power supply 50 to the first It flows outside the integrated circuit through the switch 31 and the output port Pout. When the magnetic field detection information output by the magnetic field detection circuit 20 is at a low level, the second switch 32 is turned on, the first switch 31 is turned off, and the load current is sent from the outside of the integrated circuit to the output port Pout. Flow through the second switch 32. In other embodiments of the present disclosure, it can be understood that the first switch 31 and the second switch 32 may have other structures, which are not limited in this disclosure as the case may be. .

  In another embodiment of the present disclosure, the output control circuit 30 includes a first current path through which current flows from the output port to the outside, a second current path through which current flows from the output port to the inside, and a first current path. And a switch connected to one of the second current paths. Here, the switch is controlled by the magnetic field detection information output by the magnetic field detection circuit, and enables the first current path and the second current path to be selectively turned on. It is preferable that the switch is not provided in the other of the first current path and the second current path.

  As an embodiment, as shown in FIG. 5, the output control circuit 30 includes a unidirectional switch 33, and the unidirectional switch 33 is connected to the output port Pout in the first current path, and the current of the unidirectional switch 33 is The input terminal can be connected to the output terminal of the magnetic field detection circuit 20, and the output terminal of the magnetic field detection circuit 20 can further be a resistor R1 in a second current path having a direction opposite to the direction of the first current path. To the output port Pout. When the magnetic field detection signal is at a high level, the unidirectional switch 33 is turned on, and the load current flows to the outside of the integrated circuit through the unidirectional switch 33 and the output port Pout. When the magnetic field detection signal is at a low level, the unidirectional switch 33 is turned off, and the load current flows from the outside of the integrated circuit to the output port Pout and passes through the resistor R1 and the magnetic field detection circuit 20. As another option, the resistor R1 in the second current path can be replaced by another unidirectional switch that is anti-parallel to the unidirectional switch 33. In this way, a balance is achieved between the load current flowing out of the output port and the load current flowing into the output port.

  In another embodiment, as shown in FIG. 5A, the output control circuit 30 includes a series of diodes D1 and D2, both of which are connected in reverse series between the output terminal of the magnetic field detection circuit 20 and the output port Pout. 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 are included. The cathode of the diode D1 is connected to the output terminal of the magnetic field detection circuit 20. The power supply Vcc can be connected to the output terminal of the rectifier circuit. The diode D1 is controlled by 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 from the output port Pout to the outside 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 to the output port Pout and flows through the resistor R1 and the magnetic field detection circuit 20.

  Based on any of the above embodiments, in an embodiment of the present disclosure, the input port includes an input port configured to connect to an external AC power source, and the output control circuit 30 includes the magnetic field detection information and the AC power source. Based on the polarity, the integrated circuit can operate in at least one of a first state and a second state that are switched to each other. Preferably, the magnetic field detection circuit 20 can have the same power source as the output control circuit 30.

  Based on the above embodiment, in the embodiment of the present disclosure, the output control circuit 30 has the AC power supply in a positive half cycle, and the polarity of the external magnetic field detected by the magnetic field detection circuit 20 is the first polarity. If the AC power supply is in a negative half cycle and the polarity of the external magnetic field detected by the magnetic field detection circuit is a second polarity opposite to the first polarity, the output port has a flowing load current And when the AC power source is in the positive half cycle and the polarity of the external magnetic field is the second polarity, or the AC power source is in the negative half cycle and the polarity of the external magnetic field is When in the first polarity, the output port is configured to allow no flowing load current. Output when the AC power supply is in the positive half cycle and the polarity of the external magnetic field is the first polarity, or the AC power supply is in the negative half cycle and the polarity of the external magnetic field is the second polarity The situation in which the port has a load current that flows may be a situation in which the output port has a load current that flows during the entire period of the two cases, or a load that flows during a partial period in which the output port has the two cases. Note that there may be situations with current.

  Based on the above embodiments, in embodiments of the present disclosure, the input ports may include a first input port and a second input port configured to connect an external AC power source. In the present disclosure, an input port connected to an external power source is connected between the two terminals of the external power source when the input port is directly connected to the two terminals of the external power source and when the input port is connected in series with the external load. Including, but not limited to, this disclosure from case to case. As shown in FIG. 6, in the embodiment of the present disclosure, the rectifier circuit further includes a rectifier circuit 60 configured to convert alternating current output by the external AC power source 70 into direct current.

  In the embodiment of the present disclosure, the output control circuit 30 connected to the rectifier circuit 60 switches between each other based on at least magnetic field detection information, and the first state and the load in which the load current flows from the output port to the outside of the integrated circuit It can be configured to allow the integrated circuit to operate in one of the second states where current flows from outside the integrated circuit to the output port, where the load current further passes through the rectifier circuit 60. Note that it flows.

  Based on the above embodiment, in a preferred embodiment of the present disclosure, the integrated circuit further includes a voltage regulator circuit 80 disposed between the rectifier circuit 60 and the magnetic field detection circuit 20. In this embodiment, the rectifier circuit 60 can serve as the second power supply 50, and the voltage regulator circuit 80 can serve as the first power supply 40. The voltage regulator circuit 80 is configured to adjust the first voltage output from the rectifier circuit 60 to a second voltage, and the second voltage is a supply voltage to the magnetic field detection circuit 20, and The voltage is a supply voltage to the output control circuit 30, and the average value of the first voltage is made higher than the average value of the second voltage to reduce the power consumption of the integrated circuit, and the integrated circuit has sufficient driving capability. Makes it possible to have

  In a particular embodiment of the present disclosure, as shown in FIG. 7, the rectifier circuit 60 includes a full wave bridge rectifier 61 and a voltage stabilization unit 62 connected to the output terminal of the full wave bridge rectifier 61. The full wave bridge rectifier 61 is configured to convert the alternating current output from the AC power source 70 into direct current, and the voltage stabilization unit 62 sets the DC signal output from the full wave bridge rectifier 61 within a preset value range. Configured to stabilize to enter.

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

  Specifically, the ground output terminal of full wave bridge rectification is formed by electrically connecting the input terminal of the first diode 611 to the input terminal of the third diode 613, and the voltage output terminal of the full wave bridge rectifier. Is formed by electrically connecting the output terminal of the second diode 612 to the output terminal of the fourth diode 614. The Zener diode 621 is connected to the common terminal of the second diode 612 and the fourth diode 614. , And a common terminal of the first diode 611 and the third diode 613. It should be noted that in the embodiment of the present disclosure, the power terminal of the output control circuit 30 can be electrically connected to the voltage output terminal of the full wave bridge rectifier 61.

  Based on the above embodiment, in the embodiment of the present disclosure, as shown in FIG. 9, the magnetic field detection circuit 20 is configured to detect an external magnetic field and convert the external magnetic field into an electric signal. 21, 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 Including. The magnetic field detection information can be an on / off digital signal for applications that only identify the magnetic field polarity of the external magnetic field. The magnetic field detection element 21 is preferably a Hall plate.

  In a preferred embodiment, if the input port includes a first input port and a second input port both configured to connect to an external AC power source, the frequency of occurrence of the first state or the second state is It is proportional to the frequency of the AC power supply. It should be understood that the present disclosure is not limited herein.

  Hereinafter, a magnetic sensor integrated circuit according to an embodiment of the present disclosure will be described in connection with a particular application.

  As shown in FIG. 10, an embodiment of the present disclosure further provides a motor component. The motor components include a motor 200 powered by an AC power source 100, a bidirectional switch 300 connected in series to the motor 200, and a magnetic sensor integrated circuit 400 according to any of the above embodiments, and the magnetic sensor integrated circuit Are electrically connected to the control circuit of the bidirectional switch 300. Preferably, the bidirectional switch 300 may be a triac (TRIAC). It should be understood that the bidirectional switch can be implemented with other types of suitable switches. For example, the bi-directional switch can include two anti-parallel silicon controlled rectifiers, provided with corresponding control circuits, and the output signal of the output port of the magnetic sensor integrated circuit flows through the control circuit and the two silicon Control the controlled rectifier in a preset manner.

  Preferably, the motor component further includes a voltage drop circuit 500 for reducing the voltage of the AC power supply 100 to provide a reduced voltage to the magnetic sensor integrated circuit 400. The magnetic sensor integrated circuit 400 is disposed near the rotor of the motor 200 to detect changes in the rotor magnetic field.

  Based on the above embodiments, in certain embodiments of the present disclosure, the motor is a synchronous motor. It should be understood that the magnetic sensor integrated circuit is applicable to synchronous motors as well as other types of permanent magnet motors such as brushless DC motors. As shown in FIG. 11, the synchronous motor includes a stator and a rotor 11 that can rotate 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 can be made of a soft magnetic material such as pure iron, cast iron, cast steel, electric steel, or silicon steel. The rotor 11 includes a permanent magnet, and the rotor 11 operates at a constant rotational speed of 60 f / p revolutions / minute during the 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 supply and p is the number of rotor pole pairs. In the embodiment, the stator core 12 includes two poles 14 opposite to each other. Each of the poles 14 includes a pole arc 15, and the outer surface of the rotor 11 is opposite the magnetic pole arc 15, and substantially uniform air between the outer surface of the rotor 11 and the magnetic pole arc 15. A gap 13 is formed. The “substantially uniform air cap” in the present disclosure is such that a uniform air gap is formed in most of the space between the stator and the rotor, and a non-uniform air gap is formed between the stator and the rotor. It means to be formed in a small part between. Preferably, a concave starting groove 17 can be arranged in the pole pole 15 of the stator pole, and the part of the pole arc 15 other than the starting groove 17 can be concentric with the rotor. With the above configuration, a non-uniform magnetic field can be formed, and the rotor pole axis S1 has an angle inclined with respect to the center axis S2 of the stator pole when the rotor is stationary. The rotor can have a starting torque each time the motor is energized under the action of the integrated circuit. Specifically, “rotor pole axis S1” refers to the boundary between two magnetic poles having different polarities, and “center axis S2 of stator pole 14” refers to the center point of the two poles 14 of the stator. The connection line that passes through In an embodiment, both the stator and the rotor include two magnetic poles. The number of stator poles may not be equal to the number of rotor poles, and the stator and rotor may have more poles, for example 4 or 6 poles, in other embodiments. Can understand. It will be appreciated that other types of non-uniform air gaps can alternatively be formed between the rotor and the stator.

  Based on the above embodiment, in the embodiment of the present disclosure, the output control circuit 30 is configured such that the AC power source 100 is in a positive half cycle and the magnetic field polarity of the permanent magnet rotor detected by the magnetic field detection circuit 20 is the first. 1 or when the AC power source 100 is in a negative half cycle and the magnetic field polarity of the permanent magnet rotor detected by the magnetic field detection circuit 20 is a second polarity opposite to the first polarity. The bi-directional switch 300 is configured to be turned on, or the AC power source 100 is in a negative half cycle and the magnetic field polarity of the permanent magnet rotor is the first polarity, or the AC power source 100 is The bi-directional switch 300 is configured to be turned off when in the positive half cycle and the magnetic field polarity of the permanent magnet rotor is the second polarity.

  Preferably, the output control circuit 30 uses the current when the signal output from the AC power supply 100 is in a positive half cycle and the polarity of the permanent magnet rotor detected by the magnetic field detection circuit 20 is the first polarity. Of the permanent magnet rotor that is controlled to flow from the integrated circuit to the bidirectional switch 300 or that the signal output by the AC power supply 100 is in a negative half cycle and is detected by the magnetic field detection circuit 20 Is configured to control the current to flow from the bidirectional switch 300 to the integrated circuit when the second polarity is the opposite of the first polarity. When the polarity of the permanent magnet rotor is the first polarity and the AC power supply is in a positive half cycle, and / or the polarity of the permanent magnet rotor is the second polarity and the AC power supply is a negative half When in a period, the state in which the integrated circuit has a flowing current may be a state in which the integrated circuit has a flowing current during the entire period of the two cases, or a partial period in which the integrated circuit has the two cases. It should be understood that it may be in a state having a flowing current.

  In a preferred embodiment of the present disclosure, the bidirectional switch 300 can be a TRIAC, the rectifier circuit 60 is configured to be a circuit as shown in FIG. 8, and the output control circuit is 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 of the second switch 32 is configured as shown in FIG. The terminal is connected to the ground output terminal of the full wave bridge rectifier 61. When the signal output from the AC power supply 100 is in a positive half cycle and the magnetic detection circuit 20 outputs a low level, the first switch 31 is turned on and the second switch 32 is turned off in the output control circuit 30. The current is output from the AC power supply 100, the motor 200, the first input terminal of the integrated circuit 400, the voltage drop circuit (not shown in FIG. 4), and the second diode 612 of the full-wave bridge rectifier 61. The terminal flows through the first switch 31 of the output control circuit 30 in order, and returns from the output port of the bidirectional switch 300 to the AC power supply 100. After the TRIAC 300 is turned on, the series 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 it lacks a power source. Since the current flowing through the two anodes of the TRIAC 300 is sufficiently large, the TRIAC 300 remains on under conditions where there is no drive current between its control terminal and the first anode. When the signal output from the AC power supply 100 is in a negative half cycle and the magnetic field detection circuit 20 outputs a high level, the first switch 31 is turned off and the second switch 32 is turned on in the output control circuit 30. The current flows from the AC power source 100, and from the bidirectional switch 300 to the output port, the second switch 32 of the output control circuit 30, the ground output terminal of the full-wave bridge rectifier 61, the first diode 611, the integrated circuit The first input terminal of 400 and the motor 200 are returned to the AC power source 100. Similarly, since the magnetic sensor integrated circuit 400 is short-circuited after the TRIAC 300 is turned on, the output of the magnetic sensor integrated circuit 400 can be stopped, and the TRIAC 300 can be kept on. When the signal output from the AC power supply 100 is in a positive half cycle and the magnetic field detection circuit 20 outputs a high level, or the signal output from the AC power supply 100 is in a negative half cycle and the magnetic field detection circuit When 20 outputs a low level, neither the first switch 31 nor the second switch 32 in the output control circuit 30 can be turned on, and the TRIAC 300 is turned off. Therefore, the output control circuit 30 controls the integrated circuit to switch the bidirectional switch 300 between the on state and the off state in a preset manner based on the polarity of the AC power supply 100 and the magnetic field detection information. Then the energization mode of the stator winding 16 can be controlled so that the varying magnetic field generated by the stator matches the position of the rotor magnetic field and It is dragged to rotate in a single direction, thereby allowing the rotor to rotate in a fixed direction each time the motor is energized.

  As can be seen from the above description, a magnetic sensor integrated circuit according to an embodiment of the present disclosure includes an input port, an output port, 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 output magnetic field detection information. The output control circuit 30 switches the integrated circuits to each other based on at least the magnetic field detection information. The first state in which the load current flows from the output port to the outside of the integrated circuit and the load current from the outside of the integrated circuit to the output port. It is configured to allow operation in one of the flowing second states. Therefore, when the magnetic sensor integrated circuit is applied to the motor component, the magnetic field detection information in the rotor of the motor in the motor component can be detected by the magnetic field detection circuit 20, and as a result, the output control circuit 30 At least based on the magnetic field detection information, the integrated circuit is switched between the first state where the load current flows from the output port to the outside of the integrated circuit and the second state where the load current flows from the outside of the integrated circuit to the output port. It is possible to operate in one state and the rotor of the motor in the motor component can be guaranteed to always rotate in the same direction each time the rotor is started.

  In a motor component according to another embodiment of the present disclosure, the motor can be connected in series with a bidirectional switch between two terminals of an external AC power source, and a first series formed by the motor and the bidirectional switch. The branch is in parallel with the second series branch formed by the voltage drop circuit and the magnetic sensor integrated circuit. The output terminal of the magnetic sensor integrated circuit is connected to a bidirectional switch and controls the bidirectional switch to switch between an on state and an off state in a preset manner, and the power mode of the stator winding Further control.

  Motor components according to embodiments of the present disclosure can be applied to devices such as, but not limited to, pumps, fans, household appliances, vehicles, etc., and household appliances include, for example, washing machines, dishwashers, It can be a smoke exhaust device and a ventilation fan.

  Although the embodiments of the present disclosure have been described by taking an integrated circuit applied to a motor as an example, it should be noted that the field of application of the integrated circuit according to the embodiments of the present disclosure is not limited herein.

  It should be noted that the parts within this specification are described progressively, each highlighting differences from the other parts, and the same or similar parts among the parts can be referenced to each other.

  The terms “first”, “second”, and similar terms are used herein only to distinguish one entity or action from another, Or, it does not require or imply that an actual relationship or order exists between operations. Further, “including”, “comprising” or any other variation is intended to be non-exclusive. Thus, a process, method, article or apparatus that includes a plurality of elements does not include only the disclosed elements, but also includes other elements not explicitly listed, or is unique to the process, method, article, or apparatus. The element of is also included. Unless expressly limited otherwise, the statement “including” does not exclude the case where other similar elements may exist in a process, method, article, or apparatus in addition to the listed elements.

  The description of the embodiments herein enables one of ordinary skill in the art to implement or use the present disclosure. Many modifications to the embodiments will be apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the disclosure. Accordingly, the present disclosure need not be limited to the embodiments described herein, but is to be accorded with the widest scope consistent with the principles and novel features disclosed herein.

11: Rotor 12: Stator core 14: Pole 15: Magnetic pole arc 16: Stator winding 17: Starting groove 30: Output control circuit 31: First switch 32: Second switch 33: Unidirectional switch 100: AC power supply 200: motor 400: integrated circuit 611: first diode 612: second diode 613: third diode 614: fourth diode 621: Zener diode A1, A2: input port Pout: output port

Claims (10)

A magnetic sensor integrated circuit,
At least one input port and output port;
A magnetic field detection circuit configured to detect an external magnetic field and corresponding output magnetic field detection information;
Based on at least the magnetic field detection information, the integrated circuit has at least a first state in which a current flows from the output port to the outside of the integrated circuit, and a current flows from the outside of the integrated circuit to the output port. An output control circuit configured to allow switching between the two states;
A magnetic sensor integrated circuit comprising:   The magnetic field detection circuit is powered by a first power supply, and the output control circuit is powered by a second power supply different from the first power supply. Integrated circuit.   The integrated circuit according to claim 2, wherein an average value of output voltages of the first power source is lower than an average value of output voltages of the second power source.   The at least one input port includes an input port configured to connect to an external AC power source, and the output control circuit is configured such that the integrated circuit is at least based on the polarity of the AC power source and the magnetic field detection information. The integrated circuit according to claim 1, wherein the integrated circuit is configured to allow switching between a state of 1 and the second state. The output control circuit includes a first switch and a second switch, the first switch is connected to the output port in a first current path, and the second switch is connected to the first switch. Connected to the output port in a second current path having a direction opposite to the direction of the current path, the first switch and the second switch are selectively turned on based on the magnetic field detection information; Or the output control circuit includes: a first current path through which current flows from the output port to the outside; a second current path through which current flows from the output port to the inside; the first current path and the second current path; A switch connected to one of the current paths, the switch being controlled by the magnetic field detection information output by the magnetic field detection circuit, wherein the first current path and the second current path are selectively Allows to be turned on The
The integrated circuit according to claim 1, wherein the integrated circuit is characterized in that:   In the output control circuit, when the AC power source is in a positive half cycle and the polarity of the external magnetic field detected by the magnetic field detection circuit is the first polarity, or the AC power source is in a negative half cycle. And when the polarity of the external magnetic field detected by the magnetic field detection circuit is a second polarity opposite to the first polarity, the output port is controlled to have a load current flowing therethrough. And when the AC power source is in a positive half cycle and the polarity of the external magnetic field is the second polarity, or the AC power source is in a negative half cycle and the external 5. The output port is configured to be controlled to have no load current flowing therethrough when the polarity of the magnetic field is the first polarity. The accumulation according to any one of 5 Road.   The at least one input port includes a first input port and a second input port configured to be connected to an external AC power source, and the integrated circuit converts the AC output from the external AC power source to DC. The integrated circuit according to claim 1, further comprising a rectifier circuit configured to convert.   A voltage regulator circuit configured to adjust the first voltage output by the rectifier circuit to a second voltage; the second voltage being supplied to the magnetic field detection circuit; The integrated circuit according to claim 7, wherein the first voltage is supplied to the output control circuit, and an average value of the first voltage is higher than an average value of the second voltage.   A motor component comprising a motor and a motor drive circuit, wherein the motor drive circuit includes the magnetic sensor integrated circuit according to any one of claims 1 to 8.   The motor drive circuit further includes a bidirectional switch in series with the motor between two terminals of an external AC power supply, and the output port of the magnetic sensor integrated circuit is connected to a control terminal of the bidirectional switch. The motor component according to claim 9, wherein:

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