TWM542142U - Magnetic sensor integrated circuit, motor assembly and application device - Google Patents

Abstract

The present disclosure relates to a magnetic sensor integrated circuit, a motor assembly, and an application device. The magnetic sensor integrated circuit includes an enclosure, a semiconductor substrate located within the enclosure, input ports and output ports extending form the enclosure, and an electronic circuit on the semiconductor substrate. The electronic circuit including: a rectifier circuit connected to the input ports, a magnetic field detection circuit configured to detect the external magnetic field and output a corresponding magnetic field detection information, and an output control circuit connected to the rectifier circuit. The output control circuit is configured to control the magnetic sensor integrated circuit to be switched between a first state and a second state according to the magnetic field detection information. At the first state, a load current flows out of the output ports. At the second state, the load current flows into the output ports. The magnetic sensor integrated circuit can reduce the cost of the whole circuit and improve the reliability of the whole circuit.

Description

Magnetic sensor integrated circuit, motor assembly and application equipment

The invention relates to the field of magnetic field detection technology, in particular to a magnetic sensor integrated circuit.

Magnetic sensors are widely used in modern industrial and electronic products to measure magnetic field strength to measure physical parameters such as current, position, and direction. The motor industry is an important application area of magnetic sensors. In motors, magnetic sensors can be used for rotor magnetic pole position sensing.

In the prior art, the magnetic sensor usually only outputs the magnetic field detection result, and the peripheral circuit needs to be additionally set in the specific work to process the magnetic field detection result, so the overall circuit cost is high and the reliability is poor.

In one aspect, the present invention provides a magnetic sensor integrated circuit including a housing, a semiconductor substrate disposed in the housing, an input port and an output port extending from the housing, and an electronic circuit disposed on the semiconductor substrate. The input port is used for connecting an external power source; the electronic circuit includes: a rectifying circuit connected to the input port; a magnetic field detecting circuit for detecting an external magnetic field and correspondingly outputting magnetic field detecting information; and an output control circuit connected to the rectifying circuit The output control circuit is configured to cause at least one of the first state in which the integrated circuit flows out of the load current from the output port and the second state in which the load current flows from the external port to the load current based on the magnetic field detection information. The state is operated, wherein the load current also flows through the rectifier circuit.

Preferably, the output control circuit is configured to cause the integrated circuit to flow the first state of the load current from the output port to the outside and to the output from the outside based on the magnetic field detection information. The second state flowing into the load current switches operation, and both the outgoing current and the incoming current flow through the rectifier circuit.

Preferably, the magnetic field detecting circuit is powered by a first power source, and the output control circuit is powered by a second power source different from the first power source.

Preferably, the average value of the output voltage of the first power source is smaller than the average value of the output voltage of the second power source.

Preferably, the input port includes an input port for connecting an external AC power source, and the output control circuit is configured to cause the integrated circuit to flow out from the output port based on the polarity change of the AC power source and the magnetic field detection information. The first state of the load current and the second state of the load current flowing from the outside to the output port are operated in at least one of the states.

Preferably, 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 output port in a direction opposite to the first current path In the second current path, the first switch and the second switch are selectively turned on under the control of the magnetic field detection information.

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

Preferably, the output control circuit has a first current path that flows outward from the output port, a second current path that flows in a current from the output port, and is connected to the first current path and the second current path. a switch in a path controlled by the magnetic field detection information outputted by the magnetic field detecting circuit such that the first current path and the second current path are selectively turned on.

Preferably, the first current path and the second current path have no switch in the other path.

Preferably, the output control circuit is configured to detect a positive polarity of the AC power source and the magnetic field detecting circuit detects that the external magnetic field polarity is a first polarity, or the AC power source is a negative half cycle and the magnetic field detecting circuit detects the external magnetic field When the polarity is the second polarity opposite to the first polarity, the output 埠 flows through the load current, when the AC power source is in a positive half cycle and the external magnetic field polarity is the second polarity, or the AC power source is in a negative half cycle and external When the polarity of the magnetic field is the first polarity, the output 埠 no load current flows.

Preferably, the input port includes a first input port and a second input port for connecting an external AC power source, and the rectifier circuit is configured to convert the AC power output by the external AC power source into DC power.

Preferably, the integrated circuit further includes a voltage regulating circuit, the voltage regulating circuit is configured to adjust a first voltage output by the rectifier circuit to a second voltage, wherein the second voltage is a power supply voltage of the magnetic field detecting circuit, The first voltage is a supply voltage of the output control circuit, and an average of the first voltage is greater than an average of the second voltage.

Preferably, the rectifying circuit comprises a full-wave rectifier bridge and a voltage stabilizing unit connected in series with an output of the full-wave rectifier bridge, wherein the voltage stabilizing unit comprises a voltage regulator connected between two outputs of the full-wave rectifier bridge a diode, the full-wave rectifier bridge includes: a first diode and a second diode connected in series, and a third diode and a fourth diode in series, the first diode and the second diode The common end of the pole body is electrically connected to the first input port; the common end of the third diode body and the fourth diode body are electrically connected to the second input port;

The input end of the first diode is electrically connected to the input end of the third diode to form a ground output end of the full-wave rectifier bridge, and the output end of the second diode and the fourth diode The output end is electrically connected to form a voltage output end of the full-wave rectifier bridge, and the voltage stabilizing diode is connected to the common end of the second diode and the fourth diode and the first diode and the third Between the common ends of the diode.

Preferably, the rectifier circuit has a voltage output terminal and a ground output terminal, and the output control circuit is connected to the voltage output terminal and the ground output terminal. When the integrated circuit is operated in the first state, the load current sequentially passes through the first input port. The rectifier circuit, the voltage output terminal and the output control circuit are discharged from the output port to the outside. When the integrated circuit is operated in the second state, the load current flows through the output port, and sequentially flows through the output control. a circuit, the ground output, the rectifier circuit, and the first input port.

Preferably, the magnetic field detecting circuit comprises: a magnetic field detecting component for detecting an external magnetic field and converting it into an electrical signal; a signal processing unit for amplifying and de-interfering the electrical signal; and an analog digital conversion unit for The signal after amplification and interference is converted into the magnetic field detection information, and the magnetic field detection information is a switch type digital signal.

Preferably, the input port includes a first input port and a second input port for connecting 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 source.

Another aspect of the present invention provides a motor assembly including a motor and a motor drive circuit having the above-described magnetic sensor integrated circuit.

Preferably, the motor driving circuit further comprises a double-conducting switch connected in series with the motor between the two ends of the external alternating current power source; the output of the magnetic sensor integrated circuit is connected to the control end of the double-conducting switch.

Preferably, the electric machine comprises a stator and a permanent magnet rotor, the stator comprising a stator core and a single-phase winding wound on the stator core.

Preferably, the motor assembly further includes a buck for providing the magnetic power supply to the magnetic sensor integrated circuit after stepping down the alternating current power supply.

Preferably, the output control circuit is configured to detect that the magnetic field of the permanent magnet rotor is a first polarity or the alternating current power source is a negative half cycle and the magnetic field detecting circuit detects the positive polarity of the alternating current power source When the magnetic field of the permanent magnet rotor is the second polarity opposite to the first polarity, the bidirectional conduction switch is turned on, when the alternating current power source is in a negative half cycle and the permanent magnet rotor is the first polarity, or the alternating current power source is a positive half When the permanent magnet rotor is in the second polarity, the double-conducting switch is turned off.

Preferably, the output control circuit is configured to control the current flow from the integrated circuit to the bidirectional conduction when the signal output by the alternating current power source is in the positive half cycle and the magnetic field detecting circuit detects that the magnetic field of the permanent magnet rotor is the first polarity. Switching, and when the signal output by the alternating current power source is in a negative half cycle and the magnetic field detecting circuit detects that the magnetic field of the permanent magnet rotor is the second polarity opposite to the first polarity, the control current flows from the double-conducting switch to the integrated body Circuit.

Yet another aspect of the present invention provides an application device having the above-described motor assembly.

Preferably, the application device is a pump, a fan, a household appliance or a vehicle.

The magnetic sensor integrated circuit of the new embodiment expands the function of the existing magnetic sensor, which can reduce the overall circuit cost and improve the circuit reliability.

2‧‧‧Shell

20‧‧‧Magnetic field detection circuit

30‧‧‧Output control circuit

A1, A2‧‧‧ input埠

Pout‧‧‧ Output埠

60‧‧‧Rectifier circuit

40‧‧‧First power supply

50‧‧‧second power supply

31‧‧‧First switch

32‧‧‧Second switch

33‧‧‧One-way switch

R1, R2‧‧‧ resistance

D1, D2‧‧‧ diode

Vcc‧‧‧ power supply

70, 100‧‧‧ AC power supply

80‧‧‧Voltage adjustment circuit

61‧‧‧Full wave rectifier bridge

62‧‧‧Stabilizer

621‧‧‧Regulators

611‧‧‧First Diode

612‧‧‧second diode

613‧‧‧ Third Dipole

614‧‧‧Fourth dipole

VAC+‧‧‧first input埠

VAC-‧‧‧second input埠

VDD‧‧‧voltage output

200‧‧‧ motor

300‧‧‧Double-way switch

400‧‧‧Magnetic sensor integrated circuit

500‧‧‧Buck circuit

11‧‧‧Rotor

12‧‧‧ Stator core

16‧‧‧ stator winding

15‧‧‧ pole arc

17‧‧‧Starting slot

S1‧‧‧ polar axis

S2‧‧‧ central axis

14‧‧‧ extremely

21‧‧‧ Magnetic field detecting element

22‧‧‧Signal Processing Unit

23‧‧‧ analog digital conversion unit

25‧‧‧Semiconductor substrate

1 is a schematic structural view of a magnetic sensor integrated circuit provided by an embodiment of the present invention.

2 is a schematic structural view of a magnetic sensor integrated circuit provided by another embodiment of the present invention.

FIG. 3 is a schematic structural diagram of the output control circuit in the magnetic sensor integrated circuit provided by an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of the output control circuit in the magnetic sensor integrated circuit provided by another embodiment of the present invention.

FIG. 5 is a schematic structural diagram of the output control circuit in the magnetic sensor integrated circuit provided by still another embodiment of the present invention.

FIG. 6 is a schematic structural diagram of the output control circuit in the magnetic sensor integrated circuit provided by still another embodiment of the present invention.

FIG. 7 is a schematic structural view of a magnetic sensor integrated circuit provided by still another embodiment of the present invention.

FIG. 8 is a schematic structural view of a magnetic sensor integrated circuit provided by still another embodiment of the present invention.

FIG. 9 is a schematic structural view of a rectifier circuit in a magnetic sensor integrated circuit provided by still another embodiment of the present invention.

FIG. 10 is a schematic structural view of the magnetic field detecting circuit in the magnetic sensor integrated circuit provided by an embodiment of the present invention.

FIG. 11 is a schematic structural view of a motor assembly according to an embodiment of the present invention.

FIG. 12 is a schematic structural view of a motor in a motor assembly according to an embodiment of the present invention.

In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and those skilled in the art can do without departing from the spirit of the invention. The invention is not limited by the specific embodiments disclosed below.

Hereinafter, the magnetic sensor integrated circuit provided by the new embodiment will be described by taking the magnetic sensor integrated circuit applied to the motor as an example.

As shown in FIG. 1 , the embodiment of the present invention provides a magnetic sensor integrated circuit including: a housing 2 , a semiconductor substrate 25 disposed in the housing, and input electrodes A1 and A2 extending from the housing. And an output 埠Pout and an electronic circuit disposed on the semiconductor substrate 25, the input 埠 being used for connecting an external power source; the electronic circuit comprising: a rectifying circuit 60 connected to the input port; and a magnetic field detecting circuit connected to the rectifying circuit 60 20, for detecting an external magnetic field and correspondingly outputting magnetic field detection information; and an output control circuit 30 connected to the rectifying circuit 60, the output control circuit 30 is configured to cause the integrated circuit to output from the output based on at least the magnetic field detection information The first state in which the load current flows out to the outside and the second state in which the load current flows from the outside to the output port are operated in at least one of the states, wherein the load current also flows through the rectifier circuit 60.

Based on the above embodiment, in a preferred embodiment of the present invention, the output control circuit 30 is configured to cause the integrated circuit to flow the load current from the output port to the outside based at least on the magnetic field detection information. A state and a switching from the external to the second state of the output current flowing into the load current, both the outflow current and the inflow current pass through the rectifier circuit. However, the present invention does not limit this, depending on the situation.

It should be noted that, in the new embodiment, the magnetic sensor integrated circuit switches between the first state and the second state, and is not limited to the case where one state immediately switches to another state after the end of one state, and includes A situation in which a state is switched to another state after a certain period of time. In a preferred application example, the output of the magnetic sensor integrated circuit has no output during the interval between two state transitions.

Based on the above embodiment, in an embodiment of the present invention, as shown in FIG. 2, the magnetic field detecting circuit 20 is powered by a first power source 40, which is different from the first power source 40. The second power supply 50 is powered. It should be noted that, in the embodiment of the present invention, the second power source 50 may be a power source with a varying amplitude, or may be a DC power source of constant amplitude, wherein the second power source 50 In the case of a power source whose amplitude varies, it is preferably a DC power source whose amplitude varies. The present invention is not limited thereto, as the case may be.

On the basis of the above embodiment, in an embodiment of the present invention, the first power source 40 is a DC power source with stable amplitude to ensure that the magnetic field detecting circuit 20 provides a stable driving signal, so that the magnetic field detecting is performed. Circuit 20 operates stably.

On the basis of the above embodiment, in a preferred embodiment of the present invention, the average value of the output voltage of the first power source 40 is smaller than the average value of the output voltage of the second power source 50, and it should be noted that the power consumption is compared. A small power supply supplies power to the magnetic field detecting circuit 20, which can reduce the power consumption of the integrated circuit. Powering the output control circuit 30 by using a power supply with a large power consumption can provide a higher load current for the output , to ensure that the integrated circuit has Sufficient drive capability.

On the basis of the above embodiment, in an embodiment of the present invention, 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 first The second switch is connected to the output port in a second current path opposite to the direction of the first current path, and the first switch and the second switch are selectively turned on under the control of the magnetic field detection information. Preferably, the first switch may be a transistor, and the second switch may be a transistor or a diode. The present invention is not limited thereto, as the case may be.

Specifically, in an embodiment of the present invention, as shown 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, wherein the first switch 31 and the output port Pout are connected in a first current path, the second switch 32 and the output The Pout is connected to the second current path, and the control ends of the two switches of the first switch 31 and the second switch 32 are connected to the magnetic field detecting circuit 20, and the current input end of the first switch 31 is connected to a higher voltage (for example, a DC power supply) The current output is connected to the current input of the second switch 32, and the current output of the second switch 32 is connected to a lower voltage (for example, ground). If the magnetic field detection information outputted by the magnetic field detecting circuit 20 is low level, the first switch 31 is turned on, the second switch 32 is turned off, and the load current flows out from the higher voltage through the first switch 31 and the output port Pout. The magnetic field detection information outputted by the magnetic field detecting circuit 20 is a high level, the second switch 32 is turned on, the first switch 31 is turned off, and the load current flows from the outside into the output port Pout and flows through the second switch 32. In the example of FIG. 3, the first switch 31 is a positive channel metal oxide semiconductor field effect transistor (P-type MOSFET), and the second switch 32 is a negative channel metal oxide. Semiconductor field effect transistor (N-type MOSFET). It can be understood that in other embodiments, the first switch and the second switch may also be other types of semiconductor switches, such as a junction field effect transistor (JFET) or a metal semiconductor field effect transistor (MESFET). Field effect transistor.

In another embodiment of the present invention, as shown in FIG. 4, the first switch 31 is a high-level switch tube, and the second switch 32 is a single-conductor diode, and the control end of the first switch 31 The magnetic field detecting circuit 20 is connected to the cathode of the second switch 32. The current input end of the first switch 31 is connected to the second power source 50, and the current output end of the first switch 31 and the anode of the second switch 32 are connected to the output port Pout. The first switch 31 and the output port Pout are connected to the first current path, and the output port Pout, the second switch 32 and the magnetic field detecting circuit 20 are connected to the second current path, if the magnetic field detecting circuit 20 The output magnetic field detection information is high level, the first switch 31 is turned on, the second switch 32 is turned off, and the load current flows out from the second power source 50 through the first switch 31 and the output port Pout, if the field detecting circuit 20 outputs The magnetic field detection information is low level, the second switch 32 is turned on, the first switch 31 is turned off, and the load current flows from the outside into the output port Pout and flows through the second switch 32. It is to be understood that in the other embodiments of the present invention, the first switch 31 and the second switch 32 may be other structures, which are not limited by the present invention, as the case may be.

In another embodiment of the present invention, the output control circuit 30 has a first current path that flows outward from the output output 埠Pout, a second current path that flows inward from the output 埠Pout, and a connection a switch in one of the first current path and the second current path, the switch being controlled by the magnetic field detection information output by the magnetic field detecting circuit, such that the first current path and the second current path are selectively turned on. Preferably, the first current path and the second current path have no switch in the other path.

As a specific implementation, as shown in FIG. 5, the output control circuit 30 includes a one-way switch 33. The one-way switch 33 is connected to the output port Pout in the first current path, and the current input terminal is connected to the magnetic field detecting circuit 20. At the output end, the output of the magnetic field detecting circuit 20 can also be connected to the output 埠Pout via a resistor R1 in a second current path opposite to the direction of the first current path. The one-way switch 33 is turned on when the magnetic field induction signal is at a high level, and the load current flows out through the one-way switch 33 and the output 埠Pout. When the magnetic field induction signal is low, the one-way switch 33 is disconnected, and the load current is self-discharged. The external flow enters the output port Pout and flows through the resistor R1 and the magnetic field detecting circuit 20. As an alternative, The resistor R1 in the second current path can also be replaced with another one-way switch in anti-parallel with the one-way switch 33. Thus, the load current flowing from the output port and the load current flowing in are balanced.

In another specific implementation, as shown in FIG. 6, the output control circuit 30 includes diodes D1 and D2 that are connected in series between the output of the magnetic field detecting circuit 20 and the output 埠Pout, and the diodes connected in series. A resistor R1 in parallel with D1 and D2, and a resistor R2 connected between the common terminal of the diodes D1 and D2 and the power source Vcc, wherein the cathode of the diode D1 is connected to the output terminal of the magnetic field detecting circuit 20. The power supply Vcc can be connected to the voltage output of the rectifier circuit. The diode D1 is controlled by the magnetic field detection information. When the magnetic field detection information is high, the diode D1 is turned off, and the load current flows out from the output 埠Pout through the resistor R2 and the diode D2. When the magnetic field detection information is low, the load current flows from the outside to the output 埠Pout and It flows through the resistor R1 and the magnetic field detecting circuit 20.

Based on any of the above embodiments, in an embodiment of the present invention, the input port includes a first input port and a second input port for connecting an external AC power source, and the output control circuit 30 is based on the AC power source. The polarity change and the magnetic field detection information cause the integrated circuit to switch between at least the first state and the second state. Optionally, the magnetic field detecting circuit 20 and the output control circuit 30 have the same power supply.

Based on the above embodiment, in an embodiment of the present invention, the output control circuit 30 is configured to be configured when the AC power source is in a positive half cycle and the magnetic field detecting circuit 20 detects the polarity of the external magnetic field as a first polarity. Or when the AC power source is in a negative half cycle and the magnetic field detecting circuit 20 detects that the polarity of the external magnetic field is a second polarity opposite to the first polarity, causing the output 埠 to flow through the load current when the AC power source is in a positive half cycle and When the external magnetic field polarity is the second polarity, or the AC power supply is in a negative half cycle and the external magnetic field polarity is the first polarity, the output 埠 no load current flows. It is worth noting that when the AC power supply is in the positive half cycle and the external magnetic field is the first polarity, or the AC power supply is in the negative half cycle and the external magnetic field is in the second polarity, the output 埠 flowing through the load current includes both of the above two cases. During the time period, the output 埠 has a load current flowing through, and also includes the case where the output 埠 has a load current flowing only in a part of the time period.

Based on the above embodiment, in an embodiment of the present invention, the input port may include a first input port and a second input port connected to an external AC power source. In the present invention, the input 埠 connection external power source includes both the input 直接 and the external power supply directly connected to the two sides, and also includes input 埠 and external In the case where the load is serially connected to the two ends of the external power supply, the present invention does not limit this, as the case may be. It should be noted that, in the embodiment of the present invention, the rectifier circuit 60 is configured to convert the AC signal output by the external AC power source 70 into a DC signal.

Based on the above embodiment, in a preferred embodiment of the present invention, as shown in FIG. 7, the integrated circuit further includes a voltage regulating circuit 80 between the rectifier circuit 60 and the magnetic field detecting circuit 20, In an embodiment, the rectifier circuit 60 can be used as the second power source 50, and the voltage regulator circuit 80 can be used as the first power source 40, and the voltage regulator circuit 80 is configured to adjust the first voltage output by the rectifier circuit 60 to a second voltage. The second voltage is a supply voltage of the magnetic field detecting circuit 20, the first voltage is a supply voltage of the output control circuit 30, and an average value of the first voltage is greater than an average value of the second voltage to reduce the integrated body. The power consumption of the circuit ensures that the integrated circuit has sufficient drive capability.

In a specific embodiment of the present invention, as shown in FIG. 8, the rectifier circuit 60 includes: a full-wave rectifier bridge 61 and a voltage stabilization unit 62 connected to an output of the full-wave rectifier bridge 61, wherein the full-wave rectification The bridge 61 is configured to convert the alternating current output from the alternating current power source 70 into direct current, and the voltage stabilizing unit 62 is configured to stabilize the direct current output from the full-wave rectifier bridge 61 within a preset value range.

9 shows a specific circuit of the rectifier circuit 60, wherein the voltage stabilizing unit 62 includes a voltage stabilizing diode 621 connected between two output ends of the full-wave rectifier bridge 61, the full-wave rectifier bridge 61 comprising: a series connection a first diode 611 and a second diode 612 and a third diode 613 and a fourth diode 614 connected in series; a common end of the first diode 611 and the second diode 612 The first input 埠 VAC+ is electrically connected; the common end of the third diode 613 and the fourth diode 614 is electrically connected to the second input 埠 VAC-.

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

Based on any of the above embodiments, in an embodiment of the present invention, as shown in FIG. 10, the magnetic field detecting circuit 20 includes: a magnetic field detecting element 21 for detecting an external magnetic field and rotating it The signal processing unit 22 is configured to amplify and de-interfer the electrical signal; and the analog digital conversion unit 23 is configured to convert the amplified and de-interfered electrical signal into the magnetic field detection information, for only identifying For the application of the magnetic field polarity of the external magnetic field, the magnetic field detection information can be a switch type digital signal. The magnetic field detecting element 21 may preferably be a Hall plate.

In a preferred embodiment, when the input port includes a first input port and a second input port for connecting an external AC power source, the frequency of occurrence of the first state or the second state is proportional to the frequency of the AC power source. . It can be understood that the present invention is not limited to this.

The magnetic sensor integrated circuit provided by the new embodiment will be described below in conjunction with a specific application.

As shown in FIG. 11, the present embodiment further provides a motor assembly including: a motor 200 powered by an AC power source 100; a double-conducting switch 300 connected in series with the motor 200; and any of the above In the magnetic sensor integrated circuit 400 provided by the embodiment, the output 埠 of the magnetic sensor integrated circuit 400 is electrically connected to the control end of the bidirectional switch 300. Preferably, the double-conducting switch 300 can be a three-terminal bidirectional controllable switch (TRIAC). It can be understood that the double-conducting switch can also be implemented by other types of suitable switches, for example, two reverse-controlled parallel-controlled rectifiers can be included, and corresponding control circuits are provided, according to the output signal of the output of the magnetic sensor integrated circuit. The two step-controlled rectifiers are controlled by the control circuit in a predetermined manner.

Preferably, the motor assembly further includes a step-down circuit 500 for stepping down the AC power source 100 and providing the magnetic sensor integrated circuit 400. The magnetic sensor integrated circuit 400 is mounted close to the rotor of the motor 200 to sense the change in the magnetic field of the rotor.

Based on the above embodiment, in a specific embodiment of the present invention, the motor is a synchronous motor. It can be understood that the driving circuit of the present invention is applicable not only to synchronous motors but also to other types of permanent magnet motors such as DC. Brush the motor. As shown in Fig. 12, the synchronous machine includes a stator and a rotor 11 rotatable relative to the stator. The stator has a stator core 12 and stator windings 16 wound around the stator core 12. The stator core 12 can be made of soft magnetic materials such as pure iron, cast iron, cast steel, electrical steel, and niobium steel. The rotor 11 has permanent magnets. When the stator windings 16 are connected in series with an alternating current source, the rotor 11 operates at a constant speed of 60 f/p turns per minute in a steady state, where f is the frequency of the alternating current source and p is the number of pole pairs of the rotor. In the present embodiment, the stator core 12 has two opposite pole portions 14. Each pole has a pole face 15, rotor 11 The outer surface is opposite the pole arc surface 15 and forms a substantially uniform air gap therebetween. The substantially uniform air gap referred to in the present application is that a large air gap is formed between the designated sub-machine and the rotor, and only a small portion is a non-uniform air gap. Preferably, the pole arc surface 15 of the stator pole portion is provided with a concave starting groove 17, and the portion of the pole arc surface 15 other than the starting groove 17 is concentric with the rotor. The above configuration can form a non-uniform magnetic field, ensuring that the pole axis S1 of the rotor is inclined at an angle with respect to the central axis S2 of the stator pole portion when stationary, allowing the rotor to have a starting torque each time the motor is energized under the action of the integrated circuit. The pole axis S1 of the rotor refers to a boundary line between two poles of different polarities of the rotor, and the central axis S2 of the stator pole portion 14 refers to a line passing through the center of the two pole portions 14 of the stator. In this embodiment, both the stator and the rotor have two magnetic poles. It will be appreciated that in further embodiments, the number of poles of the stator and rotor may also be unequal and have more poles, such as four, six, and the like.

Based on the above embodiment, in an embodiment of the present invention, the output control circuit 30 is configured to be in the positive half cycle of the AC power source 100 and the magnetic field detecting circuit 20 detects the magnetic field of the permanent magnet rotor as the first The bidirectional conduction switch 300 is turned on when the polarity or the alternating current power source 100 is a negative half cycle and the magnetic field detecting circuit 20 detects that the magnetic field of the permanent magnet rotor is the second polarity opposite to the first polarity. When the AC power source 100 is in a negative half cycle and the permanent magnet rotor is the first polarity, or the AC power source 100 is in a positive half cycle and the permanent magnet rotor is in a second polarity, the bidirectional conduction switch 300 is turned off.

Preferably, the output control circuit 30 is configured to control the current flow from the integrated circuit when the signal output by the alternating current power source 100 is in the positive half cycle and the magnetic field detecting circuit 20 detects that the magnetic field of the permanent magnet rotor is the first polarity. The bidirectional conduction switch 300, and when the signal output by the alternating current power source 100 is in a negative half cycle and the magnetic field detecting circuit 20 detects that the magnetic field of the permanent magnet rotor is the second polarity opposite to the first polarity, the control current is controlled by the bidirectional The turn-on switch 300 flows to the integrated circuit. It can be understood that when the permanent magnet rotor is of the first magnetic polarity and the alternating current power source is a positive half cycle, or the permanent magnet rotor is the second magnetic polarity and the alternating current power source is a negative half cycle, the integrated circuit flows or flows currents including the above two types. In the case of current flow over the entire duration, there are cases where current flows in only part of the time period in the above two cases.

In a preferred embodiment of the present invention, the double-conducting switch 300 uses a three-terminal bidirectional controllable switch (TRIAC), the rectifier circuit 60 uses the circuit shown in FIG. 9, and the output control circuit uses the circuit shown in FIG. The current input end of the first switch 31 of 30 is connected to the full-wave rectifier bridge 61 At the voltage output, the current output of the second switch 32 is connected to the ground output of the full-wave rectifier bridge 61. When the signal output by the AC power source 100 is in the positive half cycle and the magnetic field detecting circuit 20 outputs a low level, the first switch 31 in the output control circuit 30 is turned on and the second switch 32 is turned off, and the current flows through the AC power source 100 and the motor 200 in sequence. The first input terminal of the integrated circuit 400, the step-down circuit, the output terminal of the second diode 612 of the full-wave rectifier bridge 61, and the first switch 31 of the output control circuit 30 are returned from the output turbulence to the double-conducting switch 300. AC power supply 100. After the TRIAC 300 is turned on, the series branch formed by the step-down circuit 500 and the magnetic sensor integrated circuit 400 is short-circuited, and the magnetic sensor integrated circuit 400 stops outputting due to no supply voltage, and the TRIAC 300 flows through its two anodes. The current between them is large enough (above its holding current) and the TRIAC300 remains conductive without a drive current between the gate and its first anode. When the signal output by the AC power source 100 is in the negative half cycle and the magnetic field detecting circuit 20 outputs a high level, the first switch 31 in the output control circuit 30 is turned off and the second switch 32 is turned on, and the current flows out from the AC power source 100. The switch 300 flows into the output port, and is returned to the AC power source via the second switch 32 of the output control circuit 30, the ground output terminal of the full-wave rectifier bridge 61, the first diode 611, the first input terminal of the integrated circuit 400, and the motor 200. 100. Similarly, after the TRIAC 300 is turned on, the magnetic sensor integrated circuit 400 is short-circuited to stop the output short circuit, and the TRIAC 300 can be kept turned on. When the signal output from the AC power source 100 is in the positive half cycle and the magnetic field detecting circuit 20 outputs a high level, or the signal output from the AC power source 100 is in the negative half cycle and the magnetic field detecting circuit 20 outputs a low level, the output control circuit 30 Neither a switch 31 nor a second switch 32 can be turned on, and the TRIAC 300 is turned off. Thus, the output control circuit 30 can cause the integrated circuit to control the bidirectional switch 300 to switch between the on and off states in a predetermined manner based on the polarity change of the alternating current power source 100 and the magnetic field detection information, thereby controlling the energization of the stator winding 16. In this way, the changing magnetic field generated by the stator is matched with the magnetic field position of the rotor, and the rotor is only rotated in a single direction, thereby ensuring that the rotor has a fixed rotation direction each time the motor is energized.

In summary, the magnetic sensor integrated circuit provided by the new embodiment includes an input port, an output port, a magnetic field detecting circuit 20, and an output control circuit 30, wherein the magnetic field detecting circuit 20 is configured to detect an external magnetic field. And outputting magnetic field detection information correspondingly, the output control circuit 30 is configured to enable the integrated circuit to flow current at least from a first state from the output port to the outside and from the external to the output port based on the magnetic field detection information. Switching between the second states, so that the magnetic sensor integrated circuit can be used to detect the motor in the motor component when applied to the motor component The magnetic field information at the rotor is such that the output control circuit 30 causes the integrated circuit to generate a current at least from the output 埠 to the outside and a second current flowing from the external to the output 至少 based at least on the magnetic field detection information. Switching between states ensures that the rotor of the motor in the motor assembly rotates in the same direction each time the motor is started.

In another embodiment of the motor assembly, the motor may form a first series branch with the bi-directional switch, the first series branch being connected in parallel with the second series branch formed by the step-down circuit and the magnetic sensor integrated circuit The source is connected between the two ends of the power supply. The output of the magnetic sensor integrated circuit is connected to the double-conducting switch, and the control bidirectional switch is switched between the on and off states in a predetermined manner to control the energization mode of the stator winding.

The motor assembly in the present embodiment may be used in, but not limited to, a pump, a fan, a home appliance, a vehicle, etc., which may be, for example, a washing machine, a dishwasher, a range hood, an exhaust fan, or the like.

It should be noted that although the present embodiment is described by taking the integrated circuit as an example in the motor, the field of application of the integrated circuit provided by the novel embodiment is not limited thereto.

Each part of this manual is described in a progressive manner. Each part focuses on the differences from other parts. The same similar parts between the parts can be referred to each other.

It should be noted that, in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such entities or operations. There is any such actual relationship or order between them. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Numerous modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be made without departing from the spirit or scope of the invention. Next, it is implemented in other embodiments. Therefore, the present invention is not limited to the embodiments shown herein, but is to be accorded the broadest scope of the principles and novel features disclosed herein.

2‧‧‧Shell

20‧‧‧Magnetic field detection circuit

30‧‧‧Output control circuit

A1, A2‧‧‧ input埠

Pout‧‧‧ Output埠

Claims (22)

A magnetic sensor integrated circuit includes a housing, a semiconductor substrate disposed in the housing, an input port and an output port extending from the housing, and an electronic circuit disposed on the semiconductor substrate, the input port being used for connection An external power supply; the electronic circuit includes: a rectifying circuit connected to the input port; a magnetic field detecting circuit for detecting an external magnetic field and correspondingly outputting magnetic field detecting information; and an output control circuit connected to the rectifying circuit, the output control circuit is used for And at least based on the magnetic field detection information, causing the integrated circuit to operate in at least one of a first state in which a load current flows from the output port to the outside and a second state in which the load current flows from the outside to the output port, wherein the The load current also flows through the rectifier circuit. The integrated circuit of claim 1, wherein the output control circuit is configured to cause the integrated circuit to flow a first state of the load current to the outside from the output port based on the magnetic field detection information and The operation is switched from the outside to the second state in which the output port flows into the load current, and both the outflow current and the inflow current flow through the rectifier circuit. The integrated circuit of claim 2, wherein the magnetic field detecting circuit is powered by a first power source, and the output control circuit is powered by a second power source different from the first power source. The integrated circuit of claim 3, wherein an average value of the output voltage of the first power source is smaller than an average value of the output voltage of the second power source. The integrated circuit of claim 1, wherein the input port comprises an input port for connecting an external AC power source, the output control circuit being configured to detect information based on a polarity change of the AC power source and the magnetic field detection information, The integrated circuit is operated in at least one of a first state in which a load current flows from the output port to the outside and a second state in which the load current flows from the outside to the output port. The integrated circuit of claim 1, wherein the output control circuit comprises a first switch and a second switch, the first switch and the output port being connected in a first current path, the second switch and The output port is connected in a second current path opposite to the direction of the first current path, and the first switch and the second switch are selectively turned on under the control of the magnetic field detection information. The integrated circuit of claim 1, wherein the output control circuit has a first current path that flows outward from the output port, a second current path that flows inward from the output port, and And a switch connected to one of the first current path and the second current path, the switch being controlled by the magnetic field detection information outputted by the magnetic field detecting circuit, such that the first current path and the second current path are selectively turned on. The integrated circuit of claim 1, wherein the first current path and the second current path have no switch in the other path. The integrated circuit of claim 1, wherein the output control circuit is configured to be in a positive half cycle and the magnetic field detecting circuit detects that the external magnetic field has a polarity of a first polarity or the alternating current power source When the magnetic field detecting circuit detects that the polarity of the external magnetic field is the second polarity opposite to the first polarity, the output 埠 flows through the load current when the alternating current power source is in a positive half cycle and the external magnetic field polarity is When the two polarities, or the AC power supply is in a negative half cycle and the external magnetic field polarity is the first polarity, the output 埠 no load current flows. The integrated circuit of claim 1, wherein the input port comprises a first input port and a second input port for connecting an external alternating current power source, the rectifying circuit is configured to output the alternating current power of the external alternating current power source. Convert to DC. The integrated circuit of claim 10, wherein the integrated circuit further includes a voltage regulating circuit, wherein the voltage regulating circuit is configured to adjust a first voltage output by the rectifier circuit to a second voltage, wherein the The second voltage is a supply voltage of the magnetic field detecting circuit, the first voltage is a supply voltage of the output control circuit, and an average value of the first voltage is greater than an average value of the second voltage. The integrated circuit of claim 10, wherein the rectifier circuit comprises a full-wave rectifier bridge and a voltage stabilization unit connected in series with an output of the full-wave rectifier bridge, wherein the voltage stabilization unit comprises a connection to the whole a voltage stabilizing diode between two output ends of the wave rectifier bridge, the full wave rectifier bridge comprising: a first diode and a second diode in series, and a third diode and a fourth pole in series a common end of the first diode and the second diode is electrically connected to the first input port; a common end of the third diode and the fourth diode is electrically connected to the second input Connecting, wherein the input end of the first diode is electrically connected to the input end of the third diode to form a ground output end of the full-wave rectifier bridge, and the output end of the second diode is opposite to the fourth Electrode output of the pole body Forming a voltage output end of the full-wave rectifier bridge, the voltage stabilizing diode is connected to a common end of the second diode and the fourth diode and a common body of the first diode and the third diode Between the ends. The integrated circuit of claim 10, wherein the rectifier circuit has a voltage output end and a ground output end, the output control circuit is connected to the voltage output end and the ground output end, and the integrated circuit is at the first When the state is running, the load current sequentially passes through the first input port, the rectifier circuit, the voltage output terminal and the output control circuit, and flows out from the output port, and the load current flows when the integrated circuit is operated in the second state. After flowing through the output port, the output control circuit, the ground output terminal, the rectifier circuit and the first input port are sequentially passed through. The integrated circuit of claim 1, wherein the magnetic field detecting circuit comprises: a magnetic field detecting component for detecting an external magnetic field and converting the electrical signal into a signal; and a signal processing unit for performing the electrical signal And the analog-to-digital conversion unit is configured to convert the amplified and de-interfered electrical signal into the magnetic field detection information, wherein the magnetic field detection information is a switch type digital signal. A motor assembly comprising a motor and a motor drive circuit, the motor drive circuit having the magnetic sensor integrated circuit according to any one of claims 1 to 14. The motor assembly of claim 15, wherein the motor drive circuit further comprises a double-conducting switch connected in series with the motor between the two ends of the external AC power source; an output of the magnetic sensor integrated circuit Connected to the control terminal of the two-way switch. The motor assembly of claim 16, wherein the motor comprises a stator and a permanent magnet rotor, the stator comprising a stator core and a single-phase winding wound on the stator core. The motor assembly of claim 16, wherein the motor assembly further includes a buck for supplying the alternating current power to the magnetic sensor integrated circuit. The motor assembly of claim 17, wherein the output control circuit is configured to be in a positive half cycle and the magnetic field detecting circuit detects that the magnetic field of the permanent magnet rotor is a first polarity, or the alternating current When the power supply is in a negative half cycle and the magnetic field detecting circuit detects that the magnetic field of the permanent magnet rotor is the second polarity opposite to the first polarity, the bidirectional conduction switch is turned on when the alternating current When the source is a negative half cycle and the permanent magnet rotor is the first polarity, or the AC power source is a positive half cycle and the permanent magnet rotor is the second polarity, the bidirectional conduction switch is turned off. The motor assembly of claim 19, wherein the output control circuit is configured to: when the signal output by the alternating current power source is in a positive half cycle and the magnetic field detecting circuit detects that the magnetic field of the permanent magnet rotor is the first polarity a control current flows from the integrated circuit to the bidirectional switch, and a signal output from the alternating current power source is in a negative half cycle and the magnetic field detecting circuit detects that the magnetic field of the permanent magnet rotor is a second polarity opposite to the first polarity At this time, the control current flows from the two-way switch to the integrated circuit. An application device having a motor assembly according to any one of claims 15 to 20. The application device of claim 21, wherein the application device is a pump, a fan, a household appliance or a vehicle.