CN114499342A - Single-phase motor driving circuit and device thereof - Google Patents

Single-phase motor driving circuit and device thereof Download PDF

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Publication number
CN114499342A
CN114499342A CN202210050941.0A CN202210050941A CN114499342A CN 114499342 A CN114499342 A CN 114499342A CN 202210050941 A CN202210050941 A CN 202210050941A CN 114499342 A CN114499342 A CN 114499342A
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China
Prior art keywords
switching tube
switching
tube
diode
power supply
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Inventor
丁兵
刘龙
吴荣波
高云峰
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Shenzhen Han's Scanner S&t Co ltd
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Shenzhen Han's Scanner S&t Co ltd
Han s Laser Technology Industry Group Co Ltd
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Priority to CN202210050941.0A priority Critical patent/CN114499342A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/04—Single phase motors, e.g. capacitor motors

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  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

The embodiment of the application belongs to the field of motor driving, and relates to a single-phase motor driving circuit which comprises a first power capacitor, a second power capacitor, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and a control module, wherein the first switching tube, the second switching tube, the third switching tube, the fourth switching tube and a motor form an H-bridge circuit; the first power supply capacitor is connected with the first power supply in parallel, and the second power supply capacitor is connected with the second power supply in parallel and used for supplying power to the motor; the H-bridge circuit is connected to two ends of the first power supply capacitor in parallel, the control module is connected to two ends of the motor in parallel and provided with a first control end, and the first control end is connected with the second power supply capacitor. The application also relates to a single-phase motor driving device. The technical scheme that this application provided can carry out different rate of change control to motor current, can let the motor satisfy higher speed and precision performance simultaneously like this. Meanwhile, the EMI conduction and radiation value is reduced, and the service life of a motor driving system is prolonged.

Description

Single-phase motor driving circuit and device thereof
Technical Field
The present disclosure relates to the field of electronic technologies, and more particularly, to a single-phase motor driving circuit and a device thereof.
Background
At present, most of single-phase motor drivers adopt a full-bridge circuit to drive the motor. When the full-bridge circuit is adopted for driving, the full-bridge bus voltage is almost considered to be constant and is according to the voltage-current formula of the inductor
Figure BDA0003474301770000011
When the voltage on the inductor is constant, the current change rate of the inductor is constant. The motor current control determines the motor performance and the rate of change of the motor current determines the motor change speed. The motor current variation value determines the motor variation precision. Since the voltage of the full-bridge driving bus is almost considered to be constant, the current change rate on the motor is constant when the motor is driven by the full bridge. It is difficult to satisfy both the motor speed and the accuracy performance.
4 switching tubes of the single-phase motor full-bridge circuit are driven, and the same switching frequency is adopted to control the switching tubes to work. When the switch tube is turned on and off, the voltage oscillation of the drain and the source can generate larger EMI (Electromagnetic Interference) conduction and radiation. Because 4 switch tubes of the current full-bridge circuit are controlled by the same switching frequency, the 4 switch tubes can generate EMI conduction and radiation values of the same frequency section when being switched on and switched off, so that the EMI conduction and radiation values of the frequency section far exceed the safety regulation and certification requirements.
To reduce the excess EMI conduction and radiation amplitude, additional EMI components, such as safety-related capacitors, common-mode inductors, etc., are added. This increases the cost and increases the system volume. Sometimes, even if more safety-related components are added, the excess EMI transmission and emission amplitude is still large.
In addition, since two phases of the full-bridge circuit take current from the bus, the bus voltage has large ripples. The larger bus voltage ripple will reduce the service life of the bus support capacitor, further reducing the system life.
Disclosure of Invention
The technical problem that this application embodiment will solve can not implement high performance control to motor speed and precision simultaneously, and simultaneously, full-bridge drive can produce with the very high EMI conduction and the radiation value of frequency section among the correlation technique, surpasss the safety regulation requirement, causes cost increase and system's volume increase to and bus voltage ripple can reduce the generating line and support the electric capacity life-span, lead to motor drive system life-span to reduce.
In order to solve the above technical problem, an embodiment of the present application provides a single-phase motor driving circuit, which adopts the following technical solutions:
the power supply comprises a first power supply capacitor, a second power supply capacitor, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and a control module; the first switching tube, the second switching tube, the third switching tube, the fourth switching tube and the motor form an H-bridge circuit;
the first power supply capacitor is connected with a first power supply in parallel, the second power supply capacitor is connected with a second power supply in parallel, and the voltage of the first power supply is greater than that of the second power supply and is used for providing power for the motor;
the H-bridge circuit is connected in parallel to two ends of the first power supply capacitor, wherein the first switching tube and the fourth switching tube are connected in series and then connected in parallel to two ends of the first power supply capacitor, the second switching tube and the third switching tube are connected in series and then connected in parallel to two ends of the first power supply capacitor, and the third switching tube and the fourth switching tube are respectively connected with one end of the second power supply capacitor;
the control module parallel connection in the motor both ends to be provided with first control end, second control end and third control end, first control end with second power capacitance connects, the second control end connect in first switch tube with between the fourth switch tube, the third control end connect in the second switch tube with between the third switch tube.
Further, the control module comprises a fifth switching tube, a sixth switching tube, a first switching diode and a second switching diode, one end of the fifth switching tube is connected with the anode of the first switching diode, one end of the sixth switching tube is connected with the anode of the second switching diode, the cathode of the first switching diode is connected between the first switching tube and the fourth switching tube, and the cathode of the second switching diode is connected between the second switching tube and the third switching tube;
and a common connection point, which is connected with the other end of the fifth switching tube and the other end of the sixth switching tube, is connected with the other end of the second power supply capacitor.
Furthermore, the switching frequencies of the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube are non-identical, the phase difference between the switching frequencies of the first switching tube and the fifth switching tube is Δ f, and the switching frequencies of the fifth switching tube are f- Δ f and f + Δ f;
when the motor is driven positively, the switching frequency of the first switching tube is f, the switching frequency of the fifth switching tube is f-delta f and f + delta f alternately, and the fourth switching tube is in an on state;
when the motor is driven negatively, the switching frequency of the second switching tube is f, the switching frequency of the sixth switching tube is f-delta f and f + delta f alternately, and the third switching tube is in an open state.
Further, the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are MOS tubes, wherein:
the drain electrode of the first switching tube is connected with one end of the first power supply capacitor, and the source electrode of the first switching tube is connected with the motor;
the drain electrode of the second switching tube is connected with one end of the first power supply capacitor, and the source electrode of the second switching tube is connected with the motor;
the drain electrode of the third switching tube is connected with the motor, and the source electrode of the third switching tube is respectively connected with the other end of the first power supply capacitor and one end of the second power supply capacitor;
the drain electrode of the fourth switching tube is connected with the motor, and the source electrode of the fourth switching tube is respectively connected with the other end of the first power supply capacitor and one end of the second power supply capacitor;
the drain electrode of the fifth switching tube is respectively connected with the other end of the second power supply capacitor and the drain electrode of the sixth switching tube, and the source electrode of the fifth switching tube is connected with the anode of the first switching diode;
and the drain electrode of the sixth switching tube is connected with the other end of the second power supply capacitor, and the source electrode of the sixth switching tube is connected with the anode of the second switching diode.
Further, the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all provided with corresponding freewheeling diodes, including a first diode, a second diode, a third diode, a fourth diode, a fifth diode and a sixth diode, wherein:
the first diode is connected with the first switch tube in parallel, the second diode is connected with the second switch tube in parallel, the third diode is connected with the third switch tube in parallel, the fourth diode is connected with the fourth switch tube in parallel, the fifth diode is connected with the fifth switch tube in parallel, and the sixth diode is connected with the sixth switch tube in parallel.
Further, the cathode of the first diode is connected to the drain of the first switch tube, and the anode of the first diode is connected to the source of the first switch tube;
the cathode of the second diode is connected to the drain of the second switching tube, and the anode of the second diode is connected to the source of the second switching tube;
the cathode of the third diode is connected to the drain of the third switching tube, and the anode of the third diode is connected to the source of the third switching tube;
the cathode of the fourth diode is connected to the drain of the fourth switching tube, and the anode of the fourth diode is connected to the source of the fourth switching tube;
the cathode of the fifth diode is connected to the drain of the fifth switching tube, and the anode of the fifth diode is connected to the source of the fifth switching tube;
the cathode of the sixth diode is connected to the drain of the sixth switching tube, and the anode of the sixth diode is connected to the source of the sixth switching tube.
In order to solve the above technical problem, an embodiment of the present application further provides a single-phase motor driving device, which adopts the following technical solutions:
the apparatus comprises a single phase motor drive circuit as described above.
Compared with the prior art, the embodiment of the application mainly has the following beneficial effects:
the single-phase motor driving circuit comprises a first power capacitor, a second power capacitor, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube and a control module, wherein the first switch tube, the second switch tube, the third switch tube, the fourth switch tube and a motor form an H-bridge circuit; the first power supply capacitor is connected with the first power supply in parallel, the second power supply capacitor is connected with the second power supply in parallel, and the voltage of the first power supply is greater than that of the second power supply and is used for providing power for the motor; the H-bridge circuit is connected in parallel to two ends of a first power capacitor, a first switching tube and a fourth switching tube are connected in series and then connected in parallel to two ends of the first power capacitor, a second switching tube and a third switching tube are connected in series and then connected in parallel to two ends of the first power capacitor, and the third switching tube and the fourth switching tube are respectively connected with one end of the second power capacitor; the control module is connected to two ends of the motor in parallel and provided with a first control end, a second control end and a third control end, the first control end is connected with the second power capacitor, the second control end is connected between the first switch tube and the fourth switch tube, and the third control end is connected between the second switch tube and the third switch tube; this application is through providing the first power capacitor and the second power capacitor of different voltages, carries out different current change rate control to the motor, can let the motor satisfy high speed and high accuracy performance simultaneously, can reduce EMI conduction and radiation value, improves motor drive system's life-span.
Drawings
In order to illustrate the solution of the present application more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a single-phase motor driving circuit provided in an embodiment of the present application;
FIG. 2 is a timing diagram of the switching tube in the embodiment of the present application;
fig. 3 shows the oscillation and EMI values generated by the switching tubes of the embodiment of the present application using the same switching frequency and a non-identical switching frequency.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
The embodiment of the application provides a single-phase motor driving circuit, and as shown in fig. 1, the circuit includes a first power capacitor C1, a second power capacitor C2, a first switch tube S1, a second switch tube S2, a third switch tube S3, a fourth switch tube S4, and a control module 10, where the first switch tube S1, the second switch tube S2, the third switch tube S3, the fourth switch tube S4, and a motor constitute an H-bridge circuit.
The first power capacitor C1 is connected in parallel with a first power source (not shown), and the second power capacitor C2 is connected in parallel with a second power source (not shown) for providing power to the motor.
It should be noted that the voltage of the first power supply is different from the voltage of the second power supply, and the voltage of the first power supply is much larger than the voltage of the second power supply, so the voltage V of the first power supply capacitor C1dc1Much greater than the voltage V of the second power supply capacitor C2dc2。
It should be understood that the motor may be provided in the single phase motor drive circuit or may be independent of the single phase motor drive circuit.
In this embodiment, the motor may specifically adopt an inductor, and as shown in the figure, the motor is an inductor L1.
The H-bridge circuit is connected in parallel with two ends of a first power supply capacitor C1, wherein a first switch tube S1 and a fourth switch tube S2 are connected in series and then connected in parallel with two ends of a first power supply capacitor C1, a second switch tube S2 and a third switch tube S3 are connected in series and then connected in parallel with two ends of the first power supply capacitor C1, and a third switch tube S3 and a fourth switch tube S4 are respectively connected with one end of a second power supply capacitor.
The control module 10 is connected in parallel to two ends of the motor and is provided with a first control end, a second control end and a third control end, the first control end is connected with the positive end of the second power capacitor, the second control end is connected between the first switch tube S1 and the fourth switch tube S4, and the third control end is connected between the second switch tube S2 and the third switch tube S3.
The control module comprises a fifth switching tube S5, a sixth switching tube S6, a first switching diode D7 and a second switching diode D8, wherein one end of the fifth switching tube S5 is connected with the anode of the first switching diode D7, one end of the sixth switching tube S6 is connected with the anode of the second switching diode D8, the cathode of the first switching diode D7 is connected between the first switching tube S1 and the fourth switching tube S4, and the cathode of the second switching diode D8 is connected between the second switching tube S2 and the third switching tube S3; the common connection point at which the other end of the fifth switching tube S5 and the other end of the sixth switching tube S6 are connected is connected to the other end (i.e., the positive terminal) of the second power supply capacitor.
In the present embodiment, the cathode of the first switching diode D7 is further connected to the motor (inductor L1), and the cathode of the second switching diode D8 is connected to the motor (inductor L1). In this embodiment, the first switching diode D7 and the second switching diode D8 may be used as protection diodes for protecting the corresponding fifth switching tube S5 and the sixth switching tube S6, and when a large reverse abnormal signal is input, the protection diodes are in an off state and cannot pass through the fifth switching tube S5 and the sixth switching tube S6, so as to avoid damage to the switching tubes.
It should be noted that the first control terminal of the control module 10 is a common connection point where the other terminal of the fifth switching tube S5 and the other terminal of the sixth switching tube S6 are connected, the second control terminal is a cathode terminal of the first switching diode D7, and the third control terminal is a cathode terminal of the second switching diode D8.
In this embodiment, when the switching tubes are operated, the switching frequencies of the switching tubes are different from each other by Δ f, so that the switching frequencies of the switching tubes are three, namely, f- Δ f and f + Δ f, regardless of whether the motor is driven positively or negatively. When the motor is driven positively, the switching frequency of the first switching tube S1 is f, the switching frequency of the fifth switching tube S5 is f-delta f and f + delta f alternately, and the fourth switching tube S4 is in an on state; when the motor is driven negatively, the switching frequency of the second switching tube S2 is f, the switching frequency of the sixth switching tube S6 is f- Δ f and f + Δ f alternately, and the third switching tube S3 is in an open state.
The switching tube may adopt a bipolar transistor or an MOS tube, and the embodiment further describes the switching tube as an MOS tube as a specific example.
Referring to fig. 1, the drain of the first switching tube S1 is connected to one end (i.e., the positive end) of the first power capacitor C1, and the source of the first switching tube S1 is connected to the motor (hereinafter, denoted by inductor L1); the drain of the second switching tube S2 is connected to one end (i.e., the positive end) of the first power capacitor C1, and the source of the second switching tube S2 is connected to the inductor L1; the drain of the third switching tube S3 is connected to the inductor L1, and the source of the third switching tube S3 is connected to the other end (i.e., the negative terminal) of the first power capacitor C1 and one end (i.e., the negative terminal) of the second power capacitor C2, respectively; the drain of the fourth switching tube S4 is connected to the inductor L1, and the source of the fourth switching tube S4 is connected to the negative terminal of the first power supply capacitor C1 and the negative terminal of the second power supply capacitor C2, respectively; the drain of the fifth switching tube S5 is connected to the other end (i.e., the positive terminal) of the second power capacitor C2 and the drain of the sixth switching tube S6, respectively, and the source of the fifth switching tube S5 is connected to the anode of the first switching diode D7; the drain of the sixth switching tube S6 is connected to the positive terminal of the second power capacitor C2, and the source of the sixth switching tube S6 is connected to the anode of the second switching diode D8.
In the present embodiment, the first switch tube S1, the fifth switch tube S5 and the third switch tube S3 form a positive motor driving circuit, and the second switch tube S2, the sixth switch tube S6 and the fourth switch tube S4 form a negative motor driving circuit.
The operation principle of the circuit will be described with reference to the timing diagram of the switching tube shown in fig. 2. The switching frequency of the switching tubes is different, when the motor is driven, the switching frequency of the first switching tube S1 is f, the switching frequency of the fifth switching tube S5 is f-delta f and f + delta f alternately, and the third switching tube S3 is always in an open state. When the first switch tube S1 and the third switch tube S3 are opened during the positive driving of the motor, the voltage V of the first power capacitor C1dc1The voltage V of the second power capacitor C2 is loaded at two ends of the inductor L1 when the fifth switching tube S5 and the third switching tube S3 are turned ondc2Loading across inductor L1.
When the motor is driven negatively, the switching frequency of the second switching tube S2 is f, the switching frequency of the sixth switching tube S5 is f- Δ f and f + Δ f alternately, and the fourth switching tube S4 is always in an on state. During the process of the motor negative driving, when the second switch tube S2 and the first switch tube S2 are in the process of the motor negative drivingWhen the four switch tubes S4 are turned on, the voltage V of the first power supply capacitor C1dc1The voltage V of the second power capacitor C2 is loaded at two ends of the inductor L1 when the sixth switching tube S5 and the fourth switching tube S4 are turned ondc2Loading across inductor L1.
Referring to fig. 3, fig. 3 shows oscillation and EMI values generated by switching on and off of the switching tubes using the same switching frequency and a non-identical switching frequency. The switching tubes adopt non-identical switching frequencies, the switching frequency jitter can be realized, EMI conduction and radiation generated by the switching-on and switching-off of the switching tubes are distributed in different frequency sections, high EMI amplitude exceeding safety regulations cannot be generated at a certain frequency, and the EMI amplitude is much smaller than the EMI conduction and radiation value generated by the same switching frequency in the same frequency section, and meets the requirements of safety regulations certification, so that the condition of more EMI components does not need to be additionally increased, the cost is reduced, and the system volume is reduced.
Secondly, due to the voltage Vdc1And voltage Vdc2Different, through two kinds of voltage control motors, can nimble control motor current's different rates of change, further control motor speed realizes motor high accuracy work. Meanwhile, different power capacitors provide current for the circuit, so that the generation of large ripples of bus voltage can be avoided, the service life of the power capacitors can be prolonged, and the service life of a motor driving system is further prolonged.
In this embodiment, each of the first switch tube S1, the second switch tube S2, the third switch tube S3, the fourth switch tube S4, the fifth switch tube S5 and the sixth switch tube S6 has a corresponding freewheeling diode, and includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5 and a sixth diode D6, where the first diode D1 is connected in parallel with the first switch tube S1, the second diode D2 is connected in parallel with the second switch tube S2, the third diode D3 is connected in parallel with the third switch tube S3, the fourth diode D4 is connected in parallel with the fourth switch tube S4, the fifth diode D5 is connected in parallel with the fifth switch tube S5, and the sixth diode D6 is connected in parallel with the sixth switch tube S6.
Specifically, the cathode of the first diode D1 is connected to the drain of the first switch tube S1, and the anode of the first diode D1 is connected to the source of the first switch tube S1; the cathode of the second diode D2 is connected to the drain of the second switching tube S2, and the anode of the second diode D2 is connected to the source of the second switching tube S2; the cathode of the third diode D3 is connected to the drain of the third switching tube S3, and the anode of the third diode D3 is connected to the source of the third switching tube S3; the cathode of the fourth diode D4 is connected to the drain of the fourth switching tube S4, and the anode of the fourth diode D4 is connected to the source of the fourth switching tube S4; the cathode of the fifth diode D5 is connected to the drain of the fifth switching tube S5, and the anode of the fifth diode D5 is connected to the source of the fifth switching tube S5; a cathode of the sixth diode D6 is connected to the drain of the sixth switching tube S6, and an anode of the sixth diode D6 is connected to the source of the sixth switching tube S6.
It should be understood that the freewheeling diode is connected in parallel at two ends of the switching tube, and when a large instantaneous reverse current is generated in the circuit, the current can be conducted out through the freewheeling diode, so that the MOS transistor is not broken down, and the function of protecting the MOS transistor is achieved.
This application is through providing the first power capacitor and the second power capacitor of different voltages, carries out different current change rate control to the motor, can let the motor satisfy high speed and high accuracy performance simultaneously, improves motor drive system's life-span, and simultaneously, non-uniformity switching frequency control circuit can reduce EMI conduction and radiation value.
The application also provides a single-phase motor driving device, and the system comprises the single-phase motor driving circuit.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims (7)

1. A single phase motor drive circuit, comprising:
the power supply comprises a first power supply capacitor, a second power supply capacitor, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and a control module; the first switching tube, the second switching tube, the third switching tube, the fourth switching tube and the motor form an H-bridge circuit;
the first power supply capacitor is connected with a first power supply in parallel, the second power supply capacitor is connected with a second power supply in parallel, and the voltage of the first power supply is greater than that of the second power supply and is used for providing power for the motor;
the H-bridge circuit is connected in parallel to two ends of the first power supply capacitor, wherein the first switching tube and the fourth switching tube are connected in series and then connected in parallel to two ends of the first power supply capacitor, the second switching tube and the third switching tube are connected in series and then connected in parallel to two ends of the first power supply capacitor, and the third switching tube and the fourth switching tube are respectively connected with one end of the second power supply capacitor;
the control module parallel connection in the motor both ends to be provided with first control end, second control end and third control end, first control end with second power capacitance connects, the second control end connect in first switch tube with between the fourth switch tube, the third control end connect in the second switch tube with between the third switch tube.
2. The single-phase motor driving circuit of claim 1, wherein the control module comprises a fifth switching tube, a sixth switching tube, a first switching diode and a second switching diode, wherein one end of the fifth switching tube is connected with an anode of the first switching diode, one end of the sixth switching tube is connected with an anode of the second switching diode, a cathode of the first switching diode is connected between the first switching tube and the fourth switching tube, and a cathode of the second switching diode is connected between the second switching tube and the third switching tube;
and a common connection point, which is connected with the other end of the fifth switching tube and the other end of the sixth switching tube, is connected with the other end of the second power supply capacitor.
3. The single-phase motor driving circuit of claim 2, wherein the switching frequencies of the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube are non-identical, the switching frequencies of the first switching tube and the fifth switching tube are different by Δ f, and the switching frequencies of the fifth switching tube are f- Δ f and f + Δ f;
when the motor is driven positively, the switching frequency of the first switching tube is f, the switching frequency of the fifth switching tube is f-delta f and f + delta f alternately, and the fourth switching tube is in an on state;
when the motor is driven negatively, the switching frequency of the second switching tube is f, the switching frequency of the sixth switching tube is f-delta f and f + delta f alternately, and the third switching tube is in an open state.
4. The single-phase motor driving circuit of claim 2, wherein the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all MOS tubes, and wherein:
the drain electrode of the first switching tube is connected with one end of the first power supply capacitor, and the source electrode of the first switching tube is connected with the motor;
the drain electrode of the second switching tube is connected with one end of the first power supply capacitor, and the source electrode of the second switching tube is connected with the motor;
the drain electrode of the third switching tube is connected with the motor, and the source electrode of the third switching tube is respectively connected with the other end of the first power supply capacitor and one end of the second power supply capacitor;
the drain electrode of the fourth switching tube is connected with the motor, and the source electrode of the fourth switching tube is respectively connected with the other end of the first power supply capacitor and one end of the second power supply capacitor;
the drain electrode of the fifth switching tube is respectively connected with the other end of the second power supply capacitor and the drain electrode of the sixth switching tube, and the source electrode of the fifth switching tube is connected with the anode of the first switching diode;
and the drain electrode of the sixth switching tube is connected with the other end of the second power supply capacitor, and the source electrode of the sixth switching tube is connected with the anode of the second switching diode.
5. The single-phase motor driving circuit of claim 2, wherein the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are each provided with a corresponding freewheeling diode comprising a first diode, a second diode, a third diode, a fourth diode, a fifth diode and a sixth diode, wherein:
the first diode is connected with the first switch tube in parallel, the second diode is connected with the second switch tube in parallel, the third diode is connected with the third switch tube in parallel, the fourth diode is connected with the fourth switch tube in parallel, the fifth diode is connected with the fifth switch tube in parallel, and the sixth diode is connected with the sixth switch tube in parallel.
6. The single-phase motor driving circuit as claimed in claim 5, wherein a cathode of the first diode is connected to a drain of the first switching tube, and an anode of the first diode is connected to a source of the first switching tube;
the cathode of the second diode is connected to the drain of the second switching tube, and the anode of the second diode is connected to the source of the second switching tube;
the cathode of the third diode is connected to the drain of the third switching tube, and the anode of the third diode is connected to the source of the third switching tube;
the cathode of the fourth diode is connected to the drain of the fourth switching tube, and the anode of the fourth diode is connected to the source of the fourth switching tube;
the cathode of the fifth diode is connected to the drain of the fifth switching tube, and the anode of the fifth diode is connected to the source of the fifth switching tube;
the cathode of the sixth diode is connected to the drain of the sixth switching tube, and the anode of the sixth diode is connected to the source of the sixth switching tube.
7. A single-phase motor driving device comprising the single-phase motor driving circuit according to any one of claims 1 to 6.
CN202210050941.0A 2022-01-17 2022-01-17 Single-phase motor driving circuit and device thereof Pending CN114499342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210050941.0A CN114499342A (en) 2022-01-17 2022-01-17 Single-phase motor driving circuit and device thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210050941.0A CN114499342A (en) 2022-01-17 2022-01-17 Single-phase motor driving circuit and device thereof

Publications (1)

Publication Number Publication Date
CN114499342A true CN114499342A (en) 2022-05-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210050941.0A Pending CN114499342A (en) 2022-01-17 2022-01-17 Single-phase motor driving circuit and device thereof

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Country Link
CN (1) CN114499342A (en)

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