WO2020191996A1 - Motor driving circuit and system - Google Patents
Motor driving circuit and system Download PDFInfo
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- WO2020191996A1 WO2020191996A1 PCT/CN2019/100993 CN2019100993W WO2020191996A1 WO 2020191996 A1 WO2020191996 A1 WO 2020191996A1 CN 2019100993 W CN2019100993 W CN 2019100993W WO 2020191996 A1 WO2020191996 A1 WO 2020191996A1
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- WIPO (PCT)
- Prior art keywords
- control circuit
- motor
- resistor
- controlled
- switch tube
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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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
Definitions
- the present disclosure relates to the field of motor drive technology, and in particular to a motor drive circuit and system.
- the driving circuit of the motor in the electric toothbrush is shown in FIG. 1.
- the drive signal of the motor has a dead time in the process of alternating high and low levels, that is, no drive waveform is output.
- the motor stops running, but the current on the path where the motor is located cannot be directly reduced to 0 milliamps (mA), but freewheeling through the diode.
- This freewheeling method causes the equivalent inductance of the motor to be equivalent to that of the diode
- the capacitor oscillates at a high frequency, causing machine noise.
- the motor drive circuit of the electric toothbrush in the prior art has a technical problem of large operating noise.
- one of the objectives of the present disclosure is to provide a motor drive circuit and system to alleviate the technical problem of high operating noise of the motor drive circuit of the electric toothbrush in the prior art.
- the present disclosure provides a motor drive circuit, including: a forward drive port, a reverse drive port, a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit;
- the first end of the first control circuit is connected to the power supply, the second end of the first control circuit is connected to the forward drive port, and the third end of the first control circuit is connected to the first end of the motor to be controlled.
- the first end of the second control circuit is connected to the power supply, the second end of the second control circuit is connected to the inversion drive port, and the third end of the second control circuit is connected to the standby The second end of the control motor is connected;
- the first end of the third control circuit is connected to the forward drive port, the second end of the third control circuit is connected to the first end of the motor to be controlled, and the third end of the third control circuit is connected to the first end of the motor to be controlled.
- the terminal is connected to the ground terminal;
- the first end of the fourth control circuit is connected to the reverse drive port, the second end of the fourth control circuit is connected to the second end of the motor to be controlled, and the third end of the fourth control circuit is The terminal is connected to the ground terminal;
- the first control circuit and the second control circuit are closed, and the current on the motor to be controlled passes through the third The control circuit and the fourth control circuit are transmitted to the ground to stop the motor to be controlled from running, wherein the third control circuit and the fourth control circuit include a resistor and a switch tube.
- the present disclosure provides a first possible implementation manner of the first aspect, wherein the third control circuit and the fourth control circuit do not include diodes.
- the present disclosure provides a second possible implementation manner of the first aspect, wherein the conduction level of the first control circuit and the second control circuit is a first level, and the first The conduction level of the third control circuit and the fourth control circuit is a second level; wherein, one of the first level and the second level is a high level, and the other is a low level.
- the present disclosure provides a third possible implementation manner of the first aspect, wherein, when the forward rotation drive port has a valid drive signal input, and the reverse rotation drive port has no valid drive signal input, The first control circuit and the fourth control circuit are turned on, and the second control circuit and the third control circuit are turned off, so that the motor to be controlled rotates forward;
- the effective driving signal is one of the first level and the second level.
- the present disclosure provides a fourth possible implementation manner of the first aspect, wherein the first control circuit includes: a first switch tube, a first resistor, and a second resistor;
- the source of the first switch tube is respectively connected to the power supply and the first end of the first resistor, and the second end of the first resistor is respectively connected to the first end and the first end of the second resistor.
- the gate of the first switch tube is connected, and the second end of the second resistor is connected to the forward drive port;
- the drain of the first switch tube is connected to the first end of the motor to be controlled.
- the present disclosure provides a fifth possible implementation manner of the first aspect, wherein the second control circuit includes: a second switch tube, a third resistor, and a fourth resistor;
- the source of the second switch tube is respectively connected to the power supply and the first end of the third resistor, and the second end of the third resistor is respectively connected to the first end and the first end of the fourth resistor.
- the gate of the second switch tube is connected, and the second end of the fourth resistor is connected to the inversion drive port;
- the drain of the second switch tube is connected to the second end of the motor to be controlled.
- the present disclosure provides a sixth possible implementation manner of the first aspect, wherein the third control circuit includes: a third switch tube, a fifth resistor, and a sixth resistor;
- the first end of the fifth resistor is connected to the forward drive port, and the second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the gate of the third switch tube. Connected, the second end of the sixth resistor is respectively connected to the source and ground of the third switch tube;
- the drain of the third switch tube is connected to the first end of the motor to be controlled.
- the present disclosure provides a seventh possible implementation manner of the first aspect, wherein the fourth control circuit includes: a fourth switch tube, a seventh resistor, and an eighth resistor;
- the first end of the seventh resistor is connected to the inversion drive port, and the second end of the seventh resistor is respectively connected to the first end of the eighth resistor and the gate of the fourth switch tube. Connected, the second end of the eighth resistor is respectively connected to the source and ground of the fourth switch tube;
- the drain of the fourth switch tube is connected to the second end of the motor to be controlled.
- the present disclosure provides an eighth possible implementation manner of the first aspect, wherein the first switch tube includes a PMOS tube.
- the present disclosure provides a ninth possible implementation manner of the first aspect, wherein the second switch tube includes a PMOS tube.
- the present disclosure provides a tenth possible implementation manner of the first aspect, wherein the third switch tube includes an NMOS tube.
- the present disclosure provides an eleventh possible implementation manner of the first aspect, wherein the fourth switch tube includes an NMOS tube.
- the present disclosure provides a twelfth possible implementation manner of the first aspect, wherein the effective driving signal is a low level.
- the present disclosure provides a thirteenth possible implementation manner of the first aspect, wherein the effective drive signal is at a high level, and both the first control circuit and the second control circuit adopt NMOS
- the tube is used as a switch tube, and the third control circuit and the fourth control circuit both use PMOS tubes as the switch tube.
- the present disclosure also provides a motor drive system, the system includes the motor drive circuit described in the above first aspect, and further includes: a motor to be controlled;
- the motor to be controlled is connected to the motor drive circuit.
- FIG. 1 is a driving circuit of a motor in the prior art provided by the present disclosure
- FIG. 2 is a schematic diagram of the structure of a motor drive circuit of the present disclosure
- FIG. 3 is a schematic diagram of circuit connection of a motor drive circuit of the present disclosure
- Fig. 4 is a schematic structural diagram of a motor drive system of the present disclosure.
- Fig. 2 is a schematic structural diagram of a motor drive circuit provided according to the present disclosure.
- the motor drive circuit includes: a forward drive port INA, a reverse drive port INB, a first control circuit 11, a second control circuit 12, a third control circuit 13, and a fourth control circuit 14.
- the motor to be controlled includes two connection terminals.
- the first control circuit 11, the second control circuit 12, the third control circuit 13, and the fourth control circuit 14 each include three connection terminals.
- the first terminal of the first control circuit 11 is connected to the power supply VBAT, the second terminal of the first control circuit 11 is connected to the forward drive port INA, and the third terminal of the first control circuit 11 is connected to the first terminal of the motor to be controlled. ⁇ End connection.
- the first end of the second control circuit 12 is connected to the power supply VBAT, the second end of the second control circuit 12 is connected to the inversion drive port INB, and the third end of the second control circuit 12 is connected to the second end of the motor to be controlled .
- the first end of the third control circuit 13 is connected to the forward drive port INA, the second end of the third control circuit 13 is connected to the first end of the motor to be controlled, and the third end of the third control circuit 13 is connected to the ground end.
- the first end of the fourth control circuit 14 is connected to the inversion drive port INB, the second end of the fourth control circuit 14 is connected to the second end of the motor to be controlled, and the third end of the fourth control circuit is connected to the ground end.
- the first control circuit 11 and the second control circuit 12 are closed, and the motor The current is transmitted to the ground through the third control circuit 13 and the fourth control circuit 14 to stop the motor to be controlled.
- the third control circuit 13 and the fourth control circuit 14 include resistors and switch tubes, but do not include diodes.
- the motor drive circuit provided by the present disclosure is specifically composed of a first control circuit 11, a second control circuit 12, a third control circuit 13, a fourth control circuit 14, a forward rotation drive port INA and a reverse rotation drive port INB.
- the forward drive port INA is connected to the second end of the first control circuit 11 and the first end of the third control circuit 13 respectively, and the reverse drive port INB is connected to the first end of the second control circuit 12 respectively.
- the second terminal is connected to the first terminal of the fourth control circuit 14, the first terminal of the first control circuit 11 and the first terminal of the second control circuit 12 are connected to the power supply VBAT, and the third terminal of the third control circuit 13 is connected to the fourth terminal.
- the third end of the control circuit 14 is grounded, the first end of the motor to be controlled is connected to the third end of the first control circuit 11 and the second end of the third control circuit 13 respectively, and the second end of the motor to be controlled is connected to the second
- the third terminal of the control circuit 12 is connected to the second terminal of the fourth control circuit 14.
- the third control circuit 13 and the fourth control circuit 14 when there is no valid drive signal input at the forward drive port INA and the reverse drive port INB, the third control circuit 13 and the fourth control circuit 14 will be in a conducting state, and the first end of the waiting motor will pass The third control circuit 13 is grounded, and the second end of the motor to be controlled is grounded through the fourth control circuit 14, so that the inductive current in the motor to be controlled is released through the ground loop, and the motor stops running.
- the third control circuit 13 and the fourth control circuit 14 of the present disclosure are both composed of resistors and switch tubes, and do not include diodes that can oscillate at high frequency with the equivalent inductance of the motor. Therefore, the motor will not be caused by high frequency during operation. Noise caused by oscillations.
- the third control circuit 13 is closed, the first control circuit 11 is turned on, the fourth control circuit 14 is turned on, and the second control circuit 12 is closed, and the current flows from the first end of the motor to be controlled to the second end of the motor to be controlled, so that the motor to be controlled realizes forward rotation.
- the fourth control circuit 14 When the reverse drive port INB inputs a valid drive signal and the forward drive port INA has no valid drive signal input, the fourth control circuit 14 is turned off, the second control circuit 12 is turned on, the third control circuit 13 is turned on, and the first control circuit 11 is closed, and current flows from the second end of the motor to be controlled to the first end of the motor to be controlled, so that the motor to be controlled can reverse.
- the diode freewheeling method is used to gradually reduce the current in the motor to 0mA, and the equivalent inductance of the motor in this circuit structure will be the same as that of the diode.
- the equivalent capacitor oscillates at a high frequency, causing machine noise.
- the motor drive circuit provided by the present disclosure when there is no valid drive signal input at the forward drive port INA and the reverse drive port INB, the current on the motor to be controlled will pass through the third The control circuit 13 and the fourth control circuit 14 are transmitted to the ground terminal to stop the motor to be controlled.
- the third control circuit 13 and the fourth control circuit 14 include resistors and switch tubes, there are no diodes, so high frequency will not be caused. Oscillation increases operating noise and alleviates the technical problem of high operating noise of the motor drive circuit of the electric toothbrush in the prior art.
- the conduction levels of the first control circuit 11 and the second control circuit 12 are the same, and both are the first level.
- the conduction levels of the third control circuit 13 and the fourth control circuit 14 are the same, and both are the second level.
- one of the first level and the second level is a high level, and the other is a low level.
- the first control circuit 11 includes a first switch tube Q1, a first resistor R1, and a second resistor R2, and the first switch tube Q1 includes a PMOS tube.
- the source S of the first switching tube Q1 is respectively connected to the power supply VBAT and the first end of the first resistor R1, and the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the first switching tube respectively.
- the gate G of Q1 is connected, and the second end of the second resistor R2 is connected to the forward drive port INA.
- the drain D of the first switch Q1 is connected to the first terminal of the motor to be controlled.
- the first control circuit 11 when the first switch tube Q1 is a PMOS tube will be described in detail below.
- the voltage of the gate G of the first switch Q1 is the node voltage of the connection node between the second end of the first resistor R1 and the first end of the second resistor R2, and the first switch Q1
- the source S and the first end of the first resistor R1 are both connected to the power supply VBAT.
- the second end of the second resistor R2 is connected to the forward drive port INA.
- the forward drive port INA inputs a high level
- the first switch The tube Q1 is turned off, that is, the first control circuit 11 is turned off.
- the third control circuit 13 is turned on, that is, the high level is an invalid drive signal, and the low level is an effective drive signal.
- the forward drive port INA should input a valid drive signal (low level), and the reverse drive port INB should input an invalid drive signal (high level).
- the fourth control circuit 14 is turned on ,
- the second control circuit 12 and the third control circuit 13 are turned off, and the gate-source voltage of the first switch tube Q1 meets the PMOS conduction requirement through the voltage division of the first resistor R1 and the second resistor R2, and the first switch tube Q1 Conduction, thereby turning on the first control circuit 11, the coil current of the motor to be controlled flows from the first end of the motor to be controlled to the second end of the motor to be controlled.
- the motor to be controlled realizes forward rotation.
- the second control circuit 12 includes a second switch tube Q2, a third resistor R3, and a fourth resistor R4, and the second switch tube Q2 includes a PMOS tube.
- the source S of the second switch tube Q2 is connected to the power supply VBAT and the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the first end of the fourth resistor R4 and the second switch tube respectively.
- the gate G of Q2 is connected, and the second end of the fourth resistor R4 is connected to the inversion drive port INB.
- the drain D of the second switch Q2 is connected to the second end of the motor to be controlled.
- the second control circuit 12 when the second switching tube Q2 is a PMOS tube will be described in detail below.
- the voltage of the gate G of the second switching tube Q2 is the third resistor R3.
- the second end of the second end of the fourth resistor R4 and the first end of the node voltage, and the source S of the second switch tube Q2 and the first end of the third resistor R3 are connected to the power supply VBAT, the second end of the fourth resistor R4 and
- the inversion drive port INB is connected.
- the inversion drive port INB inputs a high level
- the second switch Q2 is turned off, that is, the second control circuit 12 is turned off.
- the fourth control circuit 14 is turned on, that is, high level. It is an invalid drive signal, and the low level is an effective drive signal.
- the reverse drive port INB should input an effective drive signal (low level), and the forward drive port INA should input an invalid drive signal (high level).
- the third control circuit 13 is turned on , The first control circuit 11 and the fourth control circuit 14 are closed, and the gate-source voltage of the second switching tube Q2 meets the PMOS conduction requirement through the voltage division of the third resistor R3 and the fourth resistance R4, and the second switching tube Q2 Turning on, thereby turning on the second control circuit 12, the current flows from the second end of the motor to be controlled to the first end of the motor to be controlled, and the motor to be controlled realizes reverse rotation.
- the third control circuit 13 includes: a third switch tube Q3, a fifth resistor R5, and a sixth resistor R6; the third switch tube Q3 includes an NMOS tube.
- the first end of the fifth resistor R5 is connected to the forward drive port INA, the second end of the fifth resistor R5 is respectively connected to the first end of the sixth resistor R6 and the gate G of the third switch Q3, and the sixth The second end of the resistor R6 is respectively connected to the source S and the ground end of the third switch tube Q3;
- the drain D of the third switch Q3 is connected to the first end of the motor to be controlled.
- the third control circuit 13 when the third switching tube Q3 is an NMOS tube will be described in detail below.
- the voltage of the gate G of the third switching tube Q3 is the fifth resistor R5.
- the node voltage of the connection node between the second end of the sixth resistor R6 and the first end of the sixth resistor R6, and the first end of the fifth resistor R5 is connected to the forward drive port INA, the source S of the third switch Q3 and the sixth resistor The second end of R6 is grounded.
- the forward drive port INA inputs a high level
- the voltage division of the fifth resistor R5 and the sixth resistor R6 makes the gate-source voltage of the third switch tube Q3 meet the NMOS conduction requirement.
- the three switch Q3 is turned on, that is, the third control circuit 13 is turned on.
- the first control circuit 11 is turned off, that is, the high level is an invalid drive signal, and the low level is an effective drive signal.
- the reverse drive port INB should input a valid drive signal (low level) to turn off the fourth control circuit 14 and turn on the second control circuit 12.
- the second end of the motor flows to the first end of the motor to be controlled, and the motor to be controlled realizes reverse rotation.
- the fourth control circuit 14 includes a fourth switch tube Q4, a seventh resistor R7, and an eighth resistor R8, and the fourth switch tube Q4 includes an NMOS tube.
- the first end of the seventh resistor R7 is connected to the inversion drive port INB, the second end of the seventh resistor R7 is respectively connected to the first end of the eighth resistor R8 and the gate G of the fourth switch tube Q4, and the eighth The second end of the resistor R8 is respectively connected to the source S and the ground end of the fourth switch tube Q4.
- the drain D of the fourth switch tube Q4 is connected to the second end of the motor to be controlled.
- the fourth control circuit 14 when the fourth switching tube Q4 is an NMOS tube will be described in detail below.
- the voltage of the gate G of the fourth switching tube Q4 is the seventh resistor R7.
- the second terminal of the seventh resistor R8 is connected to the node voltage of the first terminal of the eighth resistor R8, and the first terminal of the seventh resistor R7 is connected to the inversion drive port INB.
- the source S of the fourth switch Q4 and the first terminal of the eighth resistor R8 The two ends are grounded.
- the gate-source voltage of the fourth switch tube Q4 reaches the NMOS conduction requirement through the voltage division of the seventh resistor R7 and the eighth resistor R8, and the fourth switch tube Q4 is turned on, that is, the fourth control circuit 14 is turned on.
- the second control circuit 12 is turned off, that is, the high level is an invalid drive signal, and the low level is an effective drive signal.
- the forward drive port INA should input a valid drive signal (low level) to turn off the third control circuit 13 and turn on the first control circuit 11.
- the motor to be controlled The coil current flows from the first end of the motor to be controlled to the second end of the motor to be controlled, and the motor to be controlled realizes forward rotation.
- each control circuit includes a switch tube and a resistor, and there is no diode connected in parallel with the switch tube, which alleviates the technical problem of high operating noise of the motor drive circuit in the prior art.
- the forward drive port INA is connected to the first control circuit 11 and the third control circuit 13 respectively. , And it is set that the first control circuit 11 and the third control circuit 13 cannot be turned on at the same time, which further ensures the safe operation of the circuit.
- the reverse driving port INB is also the same principle, which will not be repeated here.
- first switching tube Q1 and the second switching tube Q2 are PMOS tubes
- the third switching tube Q3 and the fourth switching tube Q4 are NMOS tubes.
- the user can also refer to the specific situation.
- PMOS tubes can be replaced by PNP transistors
- NMOS tubes can be replaced by NPN transistors.
- the present disclosure does not specifically limit it.
- the motor drive circuit of the present disclosure can also be applied to other fields. This disclosure does not apply to this circuit. The implementation area is restricted.
- the first switching tube Q1 and the second switching tube Q2 may be NMOS tubes, and the third switching tube Q3 and the fourth switching tube Q4 may be PMOS tubes.
- the effective driving signal is high.
- the invalid drive signal is low.
- a high level can be input to the forward drive port INA, and a low level can be input to the reverse drive port INB, so that the first switching tube Q1 and the fourth switching tube Q4 are turned on, and the second switching tube Q2 and the third switching tube Q2 are turned on.
- the switch Q3 is closed. That is, the first control circuit 11 and the fourth control circuit 14 are turned on, and the second control circuit 12 and the third control circuit 14 are turned off, thereby realizing the forward rotation of the motor to be controlled.
- the present disclosure also provides a motor drive system.
- the motor drive system includes the above-mentioned motor drive circuit 1 and the motor 2 to be controlled, wherein the motor 2 to be controlled is connected to the motor drive circuit 1.
- each block in the flowchart or block diagram may represent a module, program segment, or part of the code, and the module, program segment, or part of the code contains one or more functions for realizing the specified logical function.
- Executable instructions may also occur in a different order from the order marked in the drawings. For example, two consecutive blocks can actually be executed in parallel, or they can sometimes be executed in the reverse order, depending on the functions involved.
- each block in the block diagram and/or flowchart, and the combination of the blocks in the block diagram and/or flowchart can be implemented by a dedicated hardware-based system that performs the specified functions or actions Or it can be realized by a combination of dedicated hardware and computer instructions.
- the terms “installed”, “connected”, and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or Integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
- installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or Integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
- the specific meaning of the above-mentioned terms in the present disclosure can be understood in specific situations.
- the disclosed system, device, and method may be implemented in other ways.
- the device embodiments described above are merely illustrative.
- the division of the units is only a logical function division, and there may be other divisions in actual implementation.
- multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be through some communication interfaces, indirect coupling or communication connection of the devices or units, and may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the functional units in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the function is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a nonvolatile computer readable storage medium executable by a processor.
- the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present disclosure.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .
- the motor drive circuit and system provided by the present disclosure can transmit the inductance current of the motor to be controlled to the ground through the third control circuit and the fourth control circuit when there is no effective drive signal input at the forward drive port and the reverse drive port.
- the problem of large noise caused by the freewheeling of the inductance current of the motor through the diode is avoided.
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Abstract
The present invention relates to the technical field of motor driving, and provides a motor driving circuit and system. The motor driving circuit comprises a forward rotation driving port, a reverse rotation driving port, and first to fourth control circuits. The first control circuit is separately connected to a power supply, the forward rotation driving port, and a first end of a motor to be controlled. The second control circuit is separately connected to the power supply, the reverse rotation driving port, and a second end of the motor to be controlled. The third control circuit is separately connected to the forward rotation driving port, the first end of the motor to be controlled, and a grounding end. The fourth control circuit is separately connected to the reverse rotation driving port, the second end of the motor to be controlled, and the grounding end. When no effective driving signal is inputted, a current on the motor to be controlled is transmitted to the grounding end by means of the third control circuit and the fourth control circuit, so as to stop operating. The third control circuit and the fourth control circuit each comprises resistors and a switch tube. The invention would not cause high-frequency oscillation and noise increase, and alleviates the technical problem in the prior art of high operating noise of a motor driving circuit of an electric toothbrush.
Description
相关申请的交叉引用Cross references to related applications
本申请要求于2019年03月28日提交中国专利局的申请号为201910243365X,名称为“电机驱动电路及系统”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application with the application number 201910243365X and the name "Motor Drive Circuit and System" filed with the Chinese Patent Office on March 28, 2019, the entire content of which is incorporated into this application by reference.
本公开涉及电机驱动技术领域,尤其是涉及一种电机驱动电路及系统。The present disclosure relates to the field of motor drive technology, and in particular to a motor drive circuit and system.
使用普通牙刷刷牙时,刷牙的力度过大或者方法不正确都会对牙齿及牙龈造成损伤,研究表明,电动牙刷能够减少六成左右的刷牙力度,让刷牙的过程更安全有效。When using ordinary toothbrushes, excessive brushing force or incorrect methods will cause damage to teeth and gums. Studies have shown that electric toothbrushes can reduce the strength of brushing by about 60%, making the process of brushing safer and more effective.
现有技术中,电动牙刷中电机的驱动电路如图1所示。其中,电机的驱动信号在高低电平交替的过程中,有一段死区时间,即,无驱动波形输出。此时,电机停止运行,但是电机所在通路上的电流不能直接降到0毫安(mA),而是通过二极管进行续流,这种续流方式导致电机的等效电感会与二极管的等效电容出现高频震荡,引起机器噪声。In the prior art, the driving circuit of the motor in the electric toothbrush is shown in FIG. 1. Among them, the drive signal of the motor has a dead time in the process of alternating high and low levels, that is, no drive waveform is output. At this time, the motor stops running, but the current on the path where the motor is located cannot be directly reduced to 0 milliamps (mA), but freewheeling through the diode. This freewheeling method causes the equivalent inductance of the motor to be equivalent to that of the diode The capacitor oscillates at a high frequency, causing machine noise.
综上所述,现有技术中电动牙刷的电机驱动电路存在运行噪声大的技术问题。In summary, the motor drive circuit of the electric toothbrush in the prior art has a technical problem of large operating noise.
发明内容Summary of the invention
有鉴于此,本公开的目的之一在于提供一种电机驱动电路及系统,以缓解现有技术中电动牙刷的电机驱动电路运行噪声大的技术问题。In view of this, one of the objectives of the present disclosure is to provide a motor drive circuit and system to alleviate the technical problem of high operating noise of the motor drive circuit of the electric toothbrush in the prior art.
第一方面,本公开提供了一种电机驱动电路,包括:正转驱动端口、反转驱动端口、第一控制电路、第二控制电路、第三控制电路和第四控制电路;In a first aspect, the present disclosure provides a motor drive circuit, including: a forward drive port, a reverse drive port, a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit;
所述第一控制电路的第一端与供电电源连接,所述第一控制电路的第二端与所述正转驱动端口连接,所述第一控制电路的第三端与待控制电机的第一端连接;The first end of the first control circuit is connected to the power supply, the second end of the first control circuit is connected to the forward drive port, and the third end of the first control circuit is connected to the first end of the motor to be controlled. One end connected
所述第二控制电路的第一端与所述供电电源连接,所述第二控制电路的第二端与所述反转驱动端口连接,所述第二控制电路的第三端与所述待控制电机的第二端连接;The first end of the second control circuit is connected to the power supply, the second end of the second control circuit is connected to the inversion drive port, and the third end of the second control circuit is connected to the standby The second end of the control motor is connected;
所述第三控制电路的第一端与所述正转驱动端口连接,所述第三控制电路的第二端与所述待控制电机的第一端连接,所述第三控制电路的第三端与接地端连接;The first end of the third control circuit is connected to the forward drive port, the second end of the third control circuit is connected to the first end of the motor to be controlled, and the third end of the third control circuit is connected to the first end of the motor to be controlled. The terminal is connected to the ground terminal;
所述第四控制电路的第一端与所述反转驱动端口连接,所述第四控制电路的第二端与所述待控制电机的第二端连接,所述第四控制电路的第三端与接地端连接;The first end of the fourth control circuit is connected to the reverse drive port, the second end of the fourth control circuit is connected to the second end of the motor to be controlled, and the third end of the fourth control circuit is The terminal is connected to the ground terminal;
当所述正转驱动端口与所述反转驱动端口均没有有效驱动信号输入时,所述第一控制电路与所述第二控制电路关闭,所述待控制电机上的电流通过所述第三控制电路与所述第四控制电路传输至地,以使所述待控制电机停止运行,其中,所述第三控制电路和第四控 制电路包括电阻和开关管。When neither the forward drive port nor the reverse drive port has a valid drive signal input, the first control circuit and the second control circuit are closed, and the current on the motor to be controlled passes through the third The control circuit and the fourth control circuit are transmitted to the ground to stop the motor to be controlled from running, wherein the third control circuit and the fourth control circuit include a resistor and a switch tube.
结合第一方面,本公开提供了第一方面的第一种可能的实施方式,其中,所述第三控制电路和所述第四控制电路不包括二极管。With reference to the first aspect, the present disclosure provides a first possible implementation manner of the first aspect, wherein the third control circuit and the fourth control circuit do not include diodes.
结合第一方面,本公开提供了第一方面的第二种可能的实施方式,其中,所述第一控制电路和所述第二控制电路的导通电平为第一电平,所述第三控制电路和所述第四控制电路的导通电平为第二电平;其中,所述第一电平和所述第二电平的其中一个为高电平,另一个为低电平。With reference to the first aspect, the present disclosure provides a second possible implementation manner of the first aspect, wherein the conduction level of the first control circuit and the second control circuit is a first level, and the first The conduction level of the third control circuit and the fourth control circuit is a second level; wherein, one of the first level and the second level is a high level, and the other is a low level.
结合第一方面,本公开提供了第一方面的第三种可能的实施方式,其中,当所述正转驱动端口有有效驱动信号输入,且所述反转驱动端口没有有效驱动信号输入时,所述第一控制电路和所述第四控制电路导通,所述第二控制电路和所述第三控制电路关闭,使得所述待控制电机正转;With reference to the first aspect, the present disclosure provides a third possible implementation manner of the first aspect, wherein, when the forward rotation drive port has a valid drive signal input, and the reverse rotation drive port has no valid drive signal input, The first control circuit and the fourth control circuit are turned on, and the second control circuit and the third control circuit are turned off, so that the motor to be controlled rotates forward;
当所述正转驱动端口没有有效驱动信号输入,且所述反转驱动端口有有效驱动信号输入时,所述第二控制电路和所述第三控制电路导通,所述第一控制电路和所述第四控制电路关闭,使得所述待控制电机反转;When the forward drive port has no effective drive signal input and the reverse drive port has an effective drive signal input, the second control circuit and the third control circuit are turned on, and the first control circuit and The fourth control circuit is closed, so that the motor to be controlled reverses;
所述有效驱动信号为所述第一电平和所述第二电平的其中一个。The effective driving signal is one of the first level and the second level.
结合第一方面,本公开提供了第一方面的第四种可能的实施方式,其中,所述第一控制电路包括:第一开关管、第一电阻和第二电阻;With reference to the first aspect, the present disclosure provides a fourth possible implementation manner of the first aspect, wherein the first control circuit includes: a first switch tube, a first resistor, and a second resistor;
其中,所述第一开关管的源极分别与所述供电电源和所述第一电阻的第一端连接,所述第一电阻的第二端分别与所述第二电阻的第一端和所述第一开关管的栅极连接,所述第二电阻的第二端与所述正转驱动端口连接;Wherein, the source of the first switch tube is respectively connected to the power supply and the first end of the first resistor, and the second end of the first resistor is respectively connected to the first end and the first end of the second resistor. The gate of the first switch tube is connected, and the second end of the second resistor is connected to the forward drive port;
所述第一开关管的漏极与所述待控制电机的第一端连接。The drain of the first switch tube is connected to the first end of the motor to be controlled.
结合第一方面,本公开提供了第一方面的第五种可能的实施方式,其中,所述第二控制电路包括:第二开关管、第三电阻和第四电阻;With reference to the first aspect, the present disclosure provides a fifth possible implementation manner of the first aspect, wherein the second control circuit includes: a second switch tube, a third resistor, and a fourth resistor;
其中,所述第二开关管的源极分别与所述供电电源和所述第三电阻的第一端连接,所述第三电阻的第二端分别与所述第四电阻的第一端和所述第二开关管的栅极连接,所述第四电阻的第二端与所述反转驱动端口连接;Wherein, the source of the second switch tube is respectively connected to the power supply and the first end of the third resistor, and the second end of the third resistor is respectively connected to the first end and the first end of the fourth resistor. The gate of the second switch tube is connected, and the second end of the fourth resistor is connected to the inversion drive port;
所述第二开关管的漏极与所述待控制电机的第二端连接。The drain of the second switch tube is connected to the second end of the motor to be controlled.
结合第一方面,本公开提供了第一方面的第六种可能的实施方式,其中,所述第三控制电路包括:第三开关管、第五电阻和第六电阻;With reference to the first aspect, the present disclosure provides a sixth possible implementation manner of the first aspect, wherein the third control circuit includes: a third switch tube, a fifth resistor, and a sixth resistor;
其中,所述第五电阻的第一端与所述正转驱动端口连接,所述第五电阻的第二端分别与所述第六电阻的第一端和所述第三开关管的栅极连接,所述第六电阻的第二端分别与所 述第三开关管的源极和接地端连接;Wherein, the first end of the fifth resistor is connected to the forward drive port, and the second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the gate of the third switch tube. Connected, the second end of the sixth resistor is respectively connected to the source and ground of the third switch tube;
所述第三开关管的漏极与所述待控制电机的第一端连接。The drain of the third switch tube is connected to the first end of the motor to be controlled.
结合第一方面,本公开提供了第一方面的第七种可能的实施方式,其中,所述第四控制电路包括:第四开关管、第七电阻和第八电阻;With reference to the first aspect, the present disclosure provides a seventh possible implementation manner of the first aspect, wherein the fourth control circuit includes: a fourth switch tube, a seventh resistor, and an eighth resistor;
其中,所述第七电阻的第一端与所述反转驱动端口连接,所述第七电阻的第二端分别与所述第八电阻的第一端和所述第四开关管的栅极连接,所述第八电阻的第二端分别与所述第四开关管的源极和接地端连接;Wherein, the first end of the seventh resistor is connected to the inversion drive port, and the second end of the seventh resistor is respectively connected to the first end of the eighth resistor and the gate of the fourth switch tube. Connected, the second end of the eighth resistor is respectively connected to the source and ground of the fourth switch tube;
所述第四开关管的漏极与所述待控制电机的第二端连接。The drain of the fourth switch tube is connected to the second end of the motor to be controlled.
结合第一方面,本公开提供了第一方面的第八种可能的实施方式,其中,所述第一开关管包括:PMOS管。With reference to the first aspect, the present disclosure provides an eighth possible implementation manner of the first aspect, wherein the first switch tube includes a PMOS tube.
结合第一方面,本公开提供了第一方面的第九种可能的实施方式,其中,所述第二开关管包括:PMOS管。With reference to the first aspect, the present disclosure provides a ninth possible implementation manner of the first aspect, wherein the second switch tube includes a PMOS tube.
结合第一方面,本公开提供了第一方面的第十种可能的实施方式,其中,所述第三开关管包括:NMOS管。With reference to the first aspect, the present disclosure provides a tenth possible implementation manner of the first aspect, wherein the third switch tube includes an NMOS tube.
结合第一方面,本公开提供了第一方面的第十一种可能的实施方式,其中,所述第四开关管包括:NMOS管。With reference to the first aspect, the present disclosure provides an eleventh possible implementation manner of the first aspect, wherein the fourth switch tube includes an NMOS tube.
结合第一方面,本公开提供了第一方面的第十二种可能的实施方式,其中,所述有效驱动信号为低电平。With reference to the first aspect, the present disclosure provides a twelfth possible implementation manner of the first aspect, wherein the effective driving signal is a low level.
结合第一方面,本公开提供了第一方面的第十三种可能的实施方式,其中,所述有效驱动信号为高电平,所述第一控制电路和所述第二控制电路均采用NMOS管作为开关管,所述第三控制电路和所述第四控制电路均采用PMOS管作为开关管。With reference to the first aspect, the present disclosure provides a thirteenth possible implementation manner of the first aspect, wherein the effective drive signal is at a high level, and both the first control circuit and the second control circuit adopt NMOS The tube is used as a switch tube, and the third control circuit and the fourth control circuit both use PMOS tubes as the switch tube.
第二方面,本公开还提供一种电机驱动系统,所述系统包括上述第一方面中所述的电机驱动电路,还包括:待控制电机;In a second aspect, the present disclosure also provides a motor drive system, the system includes the motor drive circuit described in the above first aspect, and further includes: a motor to be controlled;
所述待控制电机与所述电机驱动电路连接。The motor to be controlled is connected to the motor drive circuit.
本公开的其他特征和优点将在随后的说明书中阐述,并且,部分地从说明书中变得显而易见,或者通过实施本公开而了解。本公开的目的和其他优点在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。Other features and advantages of the present disclosure will be described in the following specification, and partly become obvious from the specification, or understood by implementing the present disclosure. The purpose and other advantages of the present disclosure are realized and obtained by the structures specifically pointed out in the specification, claims and drawings.
为使本公开的上述目的、特征和优点能更明显易懂,下文特举较佳实施例,并配合所附附图,作详细说明如下。In order to make the above-mentioned objects, features and advantages of the present disclosure more obvious and understandable, preferred embodiments are described in detail below in conjunction with accompanying drawings.
为了更清楚地说明本公开具体实施方式或现有技术中的技术方案,下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图是本公开的一些实施方式,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly describe the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative work.
图1为本公开提供的一种现有技术中电机的驱动电路;FIG. 1 is a driving circuit of a motor in the prior art provided by the present disclosure;
图2为本公开的一种电机驱动电路的结构示意图;2 is a schematic diagram of the structure of a motor drive circuit of the present disclosure;
图3为本公开的一种电机驱动电路的电路连接示意图;3 is a schematic diagram of circuit connection of a motor drive circuit of the present disclosure;
图4为本公开的一种电机驱动系统的结构示意图。Fig. 4 is a schematic structural diagram of a motor drive system of the present disclosure.
图标:icon:
1-电机驱动电路;2-待控制电机;11-第一控制电路;12-第二控制电路;13-第三控制电路;14-第四控制电路。1-motor drive circuit; 2-motor to be controlled; 11-first control circuit; 12-second control circuit; 13-third control circuit; 14-fourth control circuit.
为使本公开的目的、技术方案和优点更加清楚,下面将结合附图对本公开的技术方案进行清楚、完整地描述,显然,所描述的实施例是本公开的一部分实施例,而不是全部的实施例。基于本公开中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本公开保护的范围。In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the technical solutions of the present disclosure will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all of them. Examples. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.
图2是根据本公开提供的一种电机驱动电路的结构示意图。如图2所示,该电机驱动电路包括:正转驱动端口INA、反转驱动端口INB、第一控制电路11、第二控制电路12、第三控制电路13和第四控制电路14。Fig. 2 is a schematic structural diagram of a motor drive circuit provided according to the present disclosure. As shown in FIG. 2, the motor drive circuit includes: a forward drive port INA, a reverse drive port INB, a first control circuit 11, a second control circuit 12, a third control circuit 13, and a fourth control circuit 14.
待控制电机包括两个连接端,第一控制电路11、第二控制电路12、第三控制电路13以及第四控制电路14各自包括三个连接端。The motor to be controlled includes two connection terminals. The first control circuit 11, the second control circuit 12, the third control circuit 13, and the fourth control circuit 14 each include three connection terminals.
其中,第一控制电路11的第一端与供电电源VBAT连接,第一控制电路11的第二端与正转驱动端口INA连接,第一控制电路11的第三端与待控制电机的第一端连接。The first terminal of the first control circuit 11 is connected to the power supply VBAT, the second terminal of the first control circuit 11 is connected to the forward drive port INA, and the third terminal of the first control circuit 11 is connected to the first terminal of the motor to be controlled.端连接。 End connection.
第二控制电路12的第一端与供电电源VBAT连接,第二控制电路12的第二端与反转驱动端口INB连接,第二控制电路12的第三端与待控制电机的第二端连接。The first end of the second control circuit 12 is connected to the power supply VBAT, the second end of the second control circuit 12 is connected to the inversion drive port INB, and the third end of the second control circuit 12 is connected to the second end of the motor to be controlled .
第三控制电路13的第一端与正转驱动端口INA连接,第三控制电路13的第二端与待控制电机的第一端连接,第三控制电路13的第三端与接地端连接。The first end of the third control circuit 13 is connected to the forward drive port INA, the second end of the third control circuit 13 is connected to the first end of the motor to be controlled, and the third end of the third control circuit 13 is connected to the ground end.
第四控制电路14的第一端与反转驱动端口INB连接,第四控制电路14的第二端与待控制电机的第二端连接,第四控制电路的第三端与接地端连接。The first end of the fourth control circuit 14 is connected to the inversion drive port INB, the second end of the fourth control circuit 14 is connected to the second end of the motor to be controlled, and the third end of the fourth control circuit is connected to the ground end.
当电机驱动波形位于死区时间段,即,当正转驱动端口INA与反转驱动端口INB均没 有有效驱动信号输入时,第一控制电路11与第二控制电路12关闭,待控制电机上的电流通过第三控制电路13与第四控制电路14传输至地,以使待控制电机停止运行,其中,第三控制电路13和第四控制电路14包括电阻和开关管,不包括二极管。When the motor drive waveform is in the dead time period, that is, when there is no valid drive signal input to the forward drive port INA and the reverse drive port INB, the first control circuit 11 and the second control circuit 12 are closed, and the motor The current is transmitted to the ground through the third control circuit 13 and the fourth control circuit 14 to stop the motor to be controlled. The third control circuit 13 and the fourth control circuit 14 include resistors and switch tubes, but do not include diodes.
具体地,本公开提供的电机驱动电路具体由第一控制电路11、第二控制电路12、第三控制电路13、第四控制电路14、正转驱动端口INA和反转驱动端口INB组成。Specifically, the motor drive circuit provided by the present disclosure is specifically composed of a first control circuit 11, a second control circuit 12, a third control circuit 13, a fourth control circuit 14, a forward rotation drive port INA and a reverse rotation drive port INB.
根据上述的电路连接方式可知,正转驱动端口INA分别与第一控制电路11的第二端和第三控制电路13的第一端连接,反转驱动端口INB分别与第二控制电路12的第二端和第四控制电路14的第一端连接,第一控制电路11的第一端和第二控制电路12的第一端连接供电电源VBAT,第三控制电路13的第三端与第四控制电路14的第三端接地,待控制电机的第一端分别与第一控制电路11的第三端和第三控制电路13的第二端连接,待控制电机的第二端分别与第二控制电路12的第三端和第四控制电路14的第二端连接。下文中将对每个控制电路的具体电路结构进行详细描述。According to the above circuit connection mode, the forward drive port INA is connected to the second end of the first control circuit 11 and the first end of the third control circuit 13 respectively, and the reverse drive port INB is connected to the first end of the second control circuit 12 respectively. The second terminal is connected to the first terminal of the fourth control circuit 14, the first terminal of the first control circuit 11 and the first terminal of the second control circuit 12 are connected to the power supply VBAT, and the third terminal of the third control circuit 13 is connected to the fourth terminal. The third end of the control circuit 14 is grounded, the first end of the motor to be controlled is connected to the third end of the first control circuit 11 and the second end of the third control circuit 13 respectively, and the second end of the motor to be controlled is connected to the second The third terminal of the control circuit 12 is connected to the second terminal of the fourth control circuit 14. The specific circuit structure of each control circuit will be described in detail below.
本实施例中,当正转驱动端口INA与反转驱动端口INB均无有效驱动信号输入时,第三控制电路13与第四控制电路14将处于导通状态,待控制电机的第一端通过第三控制电路13接地,待控制电机的第二端通过第四控制电路14接地,进而使待控制电机中的电感电流通过地回路释放,电机停止运行。In this embodiment, when there is no valid drive signal input at the forward drive port INA and the reverse drive port INB, the third control circuit 13 and the fourth control circuit 14 will be in a conducting state, and the first end of the waiting motor will pass The third control circuit 13 is grounded, and the second end of the motor to be controlled is grounded through the fourth control circuit 14, so that the inductive current in the motor to be controlled is released through the ground loop, and the motor stops running.
本公开的第三控制电路13与第四控制电路14均由电阻和开关管组成,不包括会与电机的等效电感发生高频震荡的二极管,所以电机在运行过程中不会出现由高频震荡导致的噪声。The third control circuit 13 and the fourth control circuit 14 of the present disclosure are both composed of resistors and switch tubes, and do not include diodes that can oscillate at high frequency with the equivalent inductance of the motor. Therefore, the motor will not be caused by high frequency during operation. Noise caused by oscillations.
当正转驱动端口INA输入有效驱动信号且反转驱动端口INB没有有效驱动信号输入时,第三控制电路13关闭,第一控制电路11导通,第四控制电路14导通,第二控制电路12关闭,电流从待控制电机的第一端流向待控制电机的第二端,以使待控制电机实现正转。When the forward drive port INA inputs a valid drive signal and the reverse drive port INB has no valid drive signal input, the third control circuit 13 is closed, the first control circuit 11 is turned on, the fourth control circuit 14 is turned on, and the second control circuit 12 is closed, and the current flows from the first end of the motor to be controlled to the second end of the motor to be controlled, so that the motor to be controlled realizes forward rotation.
当反转驱动端口INB输入有效驱动信号且正转驱动端口INA没有有效驱动信号输入时,第四控制电路14关闭,第二控制电路12导通,第三控制电路13导通,第一控制电路11关闭,电流从待控制电机的第二端流向待控制电机的第一端,以使待控制电机实现反转。When the reverse drive port INB inputs a valid drive signal and the forward drive port INA has no valid drive signal input, the fourth control circuit 14 is turned off, the second control circuit 12 is turned on, the third control circuit 13 is turned on, and the first control circuit 11 is closed, and current flows from the second end of the motor to be controlled to the first end of the motor to be controlled, so that the motor to be controlled can reverse.
现有技术中电动牙刷的电机驱动电路,当没有驱动信号输入时,采用二极管续流的方式使电机中的电流逐渐降到0mA,而这种电路结构中的电机的等效电感会与二极管的等效电容出现高频震荡,引起机器噪声。与现有技术中的电机驱动电路相比,本公开提供的电机驱动电路,当正转驱动端口INA与反转驱动端口INB均没有有效驱动信号输入时,待控制电机上的电流将通过第三控制电路13与第四控制电路14传输至接地端,进而使待控制电机停止运行,由于第三控制电路13和第四控制电路14包括电阻和开关管,不存在二极 管,所以不会引起高频震荡增加运行噪声,缓解了现有技术中电动牙刷的电机驱动电路运行噪声大的技术问题。In the motor drive circuit of the electric toothbrush in the prior art, when there is no drive signal input, the diode freewheeling method is used to gradually reduce the current in the motor to 0mA, and the equivalent inductance of the motor in this circuit structure will be the same as that of the diode. The equivalent capacitor oscillates at a high frequency, causing machine noise. Compared with the motor drive circuit in the prior art, the motor drive circuit provided by the present disclosure, when there is no valid drive signal input at the forward drive port INA and the reverse drive port INB, the current on the motor to be controlled will pass through the third The control circuit 13 and the fourth control circuit 14 are transmitted to the ground terminal to stop the motor to be controlled. Since the third control circuit 13 and the fourth control circuit 14 include resistors and switch tubes, there are no diodes, so high frequency will not be caused. Oscillation increases operating noise and alleviates the technical problem of high operating noise of the motor drive circuit of the electric toothbrush in the prior art.
本实施例中,第一控制电路11和第二控制电路12的导通电平相同,均为第一电平。第三控制电路13和第四控制电路14的导通电平相同,均为第二电平。其中,第一电平和第二电平的其中一个为高电平,另一个为低电平。如此,可以通过控制输入正转驱动端口INA和反转驱动端口INB的驱动信号来使得待控制电机实现正转或反转。In this embodiment, the conduction levels of the first control circuit 11 and the second control circuit 12 are the same, and both are the first level. The conduction levels of the third control circuit 13 and the fourth control circuit 14 are the same, and both are the second level. Among them, one of the first level and the second level is a high level, and the other is a low level. In this way, the motor to be controlled can realize forward or reverse rotation by controlling the drive signals input to the forward drive port INA and the reverse drive port INB.
上文是对本公开的电机驱动电路的组成结构进行了简要的描述,下面对其中的第一控制电路11的具体电路结构进行详细介绍。The foregoing is a brief description of the composition structure of the motor drive circuit of the present disclosure, and the specific circuit structure of the first control circuit 11 is described in detail below.
在一个可选的实施方式中,参考图3,第一控制电路11包括第一开关管Q1、第一电阻R1和第二电阻R2,第一开关管Q1包括PMOS管。In an alternative embodiment, referring to FIG. 3, the first control circuit 11 includes a first switch tube Q1, a first resistor R1, and a second resistor R2, and the first switch tube Q1 includes a PMOS tube.
其中,第一开关管Q1的源极S分别与供电电源VBAT和第一电阻R1的第一端连接,第一电阻R1的第二端分别与第二电阻R2的第一端和第一开关管Q1的栅极G连接,第二电阻R2的第二端与正转驱动端口INA连接。第一开关管Q1的漏极D与待控制电机的第一端连接。Wherein, the source S of the first switching tube Q1 is respectively connected to the power supply VBAT and the first end of the first resistor R1, and the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the first switching tube respectively. The gate G of Q1 is connected, and the second end of the second resistor R2 is connected to the forward drive port INA. The drain D of the first switch Q1 is connected to the first terminal of the motor to be controlled.
为了便于理解,下面将对第一开关管Q1为PMOS管时的第一控制电路11进行详细介绍。根据上文中的电路连接关系可知,第一开关管Q1的栅极G电压为第一电阻R1的第二端与第二电阻R2的第一端的连接节点的节点电压,且第一开关管Q1的源极S与第一电阻R1的第一端均连接至供电电源VBAT,第二电阻R2的第二端与正转驱动端口INA连接,当正转驱动端口INA输入高电平时,第一开关管Q1关闭,也就是第一控制电路11关闭,此时,第三控制电路13导通,即,高电平为无效驱动信号,低电平为有效驱动信号。For ease of understanding, the first control circuit 11 when the first switch tube Q1 is a PMOS tube will be described in detail below. According to the above circuit connection relationship, the voltage of the gate G of the first switch Q1 is the node voltage of the connection node between the second end of the first resistor R1 and the first end of the second resistor R2, and the first switch Q1 The source S and the first end of the first resistor R1 are both connected to the power supply VBAT. The second end of the second resistor R2 is connected to the forward drive port INA. When the forward drive port INA inputs a high level, the first switch The tube Q1 is turned off, that is, the first control circuit 11 is turned off. At this time, the third control circuit 13 is turned on, that is, the high level is an invalid drive signal, and the low level is an effective drive signal.
为使待控制电机实现正转,正转驱动端口INA应输入有效驱动信号(低电平),反转驱动端口INB应输入无效驱动信号(高电平),此时第四控制电路14导通,第二控制电路12与第三控制电路13关闭,通过第一电阻R1与第二电阻R2的分压,使第一开关管Q1的栅-源电压达到PMOS导通要求,第一开关管Q1导通,进而使第一控制电路11导通,待控制电机的线圈电流从待控制电机的第一端流向待控制电机的第二端。待控制电机实现正转。In order to realize the forward rotation of the motor to be controlled, the forward drive port INA should input a valid drive signal (low level), and the reverse drive port INB should input an invalid drive signal (high level). At this time, the fourth control circuit 14 is turned on , The second control circuit 12 and the third control circuit 13 are turned off, and the gate-source voltage of the first switch tube Q1 meets the PMOS conduction requirement through the voltage division of the first resistor R1 and the second resistor R2, and the first switch tube Q1 Conduction, thereby turning on the first control circuit 11, the coil current of the motor to be controlled flows from the first end of the motor to be controlled to the second end of the motor to be controlled. The motor to be controlled realizes forward rotation.
上文中对第一控制电路11的具体结构及工作条件进行了详细的描述,下面,对第二控制电路12的具体结构进行详细介绍。The specific structure and working conditions of the first control circuit 11 are described in detail above, and the specific structure of the second control circuit 12 is described in detail below.
在一个可选的实施方式中,参考图3,第二控制电路12包括第二开关管Q2、第三电阻R3和第四电阻R4,第二开关管Q2包括PMOS管。In an alternative embodiment, referring to FIG. 3, the second control circuit 12 includes a second switch tube Q2, a third resistor R3, and a fourth resistor R4, and the second switch tube Q2 includes a PMOS tube.
其中,第二开关管Q2的源极S分别与供电电源VBAT和第三电阻R3的第一端连接, 第三电阻R3的第二端分别与第四电阻R4的第一端和第二开关管Q2的栅极G连接,第四电阻R4的第二端与反转驱动端口INB连接。第二开关管Q2的漏极D与待控制电机的第二端连接。Wherein, the source S of the second switch tube Q2 is connected to the power supply VBAT and the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the first end of the fourth resistor R4 and the second switch tube respectively. The gate G of Q2 is connected, and the second end of the fourth resistor R4 is connected to the inversion drive port INB. The drain D of the second switch Q2 is connected to the second end of the motor to be controlled.
为了便于理解,下面将对第二开关管Q2为PMOS管时的第二控制电路12进行详细介绍,根据上文中的电路连接关系可知,第二开关管Q2的栅极G电压为第三电阻R3的第二端与第四电阻R4的第一端的节点电压,且第二开关管Q2的源极S与第三电阻R3的第一端连接供电电源VBAT,第四电阻R4的第二端与反转驱动端口INB连接,当反转驱动端口INB输入高电平时,第二开关管Q2关闭,也就是第二控制电路12关闭,此时,第四控制电路14导通,即,高电平为无效驱动信号,低电平为有效驱动信号。For ease of understanding, the second control circuit 12 when the second switching tube Q2 is a PMOS tube will be described in detail below. According to the above circuit connection relationship, the voltage of the gate G of the second switching tube Q2 is the third resistor R3. The second end of the second end of the fourth resistor R4 and the first end of the node voltage, and the source S of the second switch tube Q2 and the first end of the third resistor R3 are connected to the power supply VBAT, the second end of the fourth resistor R4 and The inversion drive port INB is connected. When the inversion drive port INB inputs a high level, the second switch Q2 is turned off, that is, the second control circuit 12 is turned off. At this time, the fourth control circuit 14 is turned on, that is, high level. It is an invalid drive signal, and the low level is an effective drive signal.
为使待控制电机实现反转,反转驱动端口INB应输入有效驱动信号(低电平),正转驱动端口INA应输入无效驱动信号(高电平),此时第三控制电路13导通,第一控制电路11和第四控制电路14关闭,通过第三电阻R3与第四电阻R4的分压,使第二开关管Q2的栅-源电压达到PMOS导通要求,第二开关管Q2导通,进而使第二控制电路12导通,电流从待控制电机的第二端流向待控制电机的第一端,待控制电机实现反转。In order to realize the reverse rotation of the motor to be controlled, the reverse drive port INB should input an effective drive signal (low level), and the forward drive port INA should input an invalid drive signal (high level). At this time, the third control circuit 13 is turned on , The first control circuit 11 and the fourth control circuit 14 are closed, and the gate-source voltage of the second switching tube Q2 meets the PMOS conduction requirement through the voltage division of the third resistor R3 and the fourth resistance R4, and the second switching tube Q2 Turning on, thereby turning on the second control circuit 12, the current flows from the second end of the motor to be controlled to the first end of the motor to be controlled, and the motor to be controlled realizes reverse rotation.
上文中对第二控制电路12的具体结构及工作条件进行了详细的描述,下面,对第三控制电路13的具体结构进行详细介绍。The specific structure and operating conditions of the second control circuit 12 are described in detail above, and the specific structure of the third control circuit 13 is described in detail below.
在一个可选的实施方式中,参考图3,第三控制电路13包括:第三开关管Q3、第五电阻R5和第六电阻R6;第三开关管Q3包括:NMOS管。In an alternative embodiment, referring to FIG. 3, the third control circuit 13 includes: a third switch tube Q3, a fifth resistor R5, and a sixth resistor R6; the third switch tube Q3 includes an NMOS tube.
其中,第五电阻R5的第一端与正转驱动端口INA连接,第五电阻R5的第二端分别与第六电阻R6的第一端和第三开关管Q3的栅极G连接,第六电阻R6的第二端分别与第三开关管Q3的源极S和接地端连接;The first end of the fifth resistor R5 is connected to the forward drive port INA, the second end of the fifth resistor R5 is respectively connected to the first end of the sixth resistor R6 and the gate G of the third switch Q3, and the sixth The second end of the resistor R6 is respectively connected to the source S and the ground end of the third switch tube Q3;
第三开关管Q3的漏极D与待控制电机的第一端连接。The drain D of the third switch Q3 is connected to the first end of the motor to be controlled.
为了便于理解,下面将对第三开关管Q3为NMOS管时的第三控制电路13进行详细介绍,根据上文中的电路连接关系可知,第三开关管Q3的栅极G电压为第五电阻R5的第二端与第六电阻R6的第一端的连接节点的节点电压,且第五电阻R5的第一端与正转驱动端口INA连接,第三开关管Q3的源极S与第六电阻R6的第二端接地,当正转驱动端口INA输入高电平时,通过第五电阻R5与第六电阻R6的分压,使第三开关管Q3的栅-源电压达到NMOS导通要求,第三开关管Q3导通,也就是第三控制电路13导通,此时,第一控制电路11关闭,即,高电平为无效驱动信号,低电平为有效驱动信号。For ease of understanding, the third control circuit 13 when the third switching tube Q3 is an NMOS tube will be described in detail below. According to the above circuit connection relationship, the voltage of the gate G of the third switching tube Q3 is the fifth resistor R5. The node voltage of the connection node between the second end of the sixth resistor R6 and the first end of the sixth resistor R6, and the first end of the fifth resistor R5 is connected to the forward drive port INA, the source S of the third switch Q3 and the sixth resistor The second end of R6 is grounded. When the forward drive port INA inputs a high level, the voltage division of the fifth resistor R5 and the sixth resistor R6 makes the gate-source voltage of the third switch tube Q3 meet the NMOS conduction requirement. The three switch Q3 is turned on, that is, the third control circuit 13 is turned on. At this time, the first control circuit 11 is turned off, that is, the high level is an invalid drive signal, and the low level is an effective drive signal.
此时,为了驱动待控制电机反转,反转驱动端口INB应输入有效驱动信号(低电平),使第四控制电路14关闭,第二控制电路12导通,此时,电流从待控制电机的第二端流向 待控制电机的第一端,待控制电机实现反转。At this time, in order to drive the motor to be controlled to reverse, the reverse drive port INB should input a valid drive signal (low level) to turn off the fourth control circuit 14 and turn on the second control circuit 12. The second end of the motor flows to the first end of the motor to be controlled, and the motor to be controlled realizes reverse rotation.
上文中对第三控制电路13的具体结构及工作条件进行了详细的描述,下面,对第四控制电路14的具体结构进行详细介绍。The specific structure and working conditions of the third control circuit 13 are described in detail above, and the specific structure of the fourth control circuit 14 is described in detail below.
在一个可选的实施方式中,参考图3,第四控制电路14包括,第四开关管Q4、第七电阻R7和第八电阻R8,第四开关管Q4包括,NMOS管。In an alternative embodiment, referring to FIG. 3, the fourth control circuit 14 includes a fourth switch tube Q4, a seventh resistor R7, and an eighth resistor R8, and the fourth switch tube Q4 includes an NMOS tube.
其中,第七电阻R7的第一端与反转驱动端口INB连接,第七电阻R7的第二端分别与第八电阻R8的第一端和第四开关管Q4的栅极G连接,第八电阻R8的第二端分别与第四开关管Q4的源极S和接地端连接。第四开关管Q4的漏极D与待控制电机的第二端连接。The first end of the seventh resistor R7 is connected to the inversion drive port INB, the second end of the seventh resistor R7 is respectively connected to the first end of the eighth resistor R8 and the gate G of the fourth switch tube Q4, and the eighth The second end of the resistor R8 is respectively connected to the source S and the ground end of the fourth switch tube Q4. The drain D of the fourth switch tube Q4 is connected to the second end of the motor to be controlled.
为了便于理解,下面将对第四开关管Q4为NMOS管时的第四控制电路14进行详细介绍,根据上文中的电路连接关系可知,第四开关管Q4的栅极G电压为第七电阻R7的第二端与第八电阻R8的第一端的节点电压,且第七电阻R7的第一端与反转驱动端口INB连接,第四开关管Q4的源极S与第八电阻R8的第二端接地,当反转驱动端口INB输入高电平时,通过第七电阻R7与第八电阻R8的分压,使第四开关管Q4的栅-源电压达到NMOS导通要求,第四开关管Q4导通,也就是第四控制电路14导通,此时,第二控制电路12关闭,即,高电平为无效驱动信号,低电平为有效驱动信号。For ease of understanding, the fourth control circuit 14 when the fourth switching tube Q4 is an NMOS tube will be described in detail below. According to the above circuit connection relationship, the voltage of the gate G of the fourth switching tube Q4 is the seventh resistor R7. The second terminal of the seventh resistor R8 is connected to the node voltage of the first terminal of the eighth resistor R8, and the first terminal of the seventh resistor R7 is connected to the inversion drive port INB. The source S of the fourth switch Q4 and the first terminal of the eighth resistor R8 The two ends are grounded. When the inversion drive port INB inputs a high level, the gate-source voltage of the fourth switch tube Q4 reaches the NMOS conduction requirement through the voltage division of the seventh resistor R7 and the eighth resistor R8, and the fourth switch tube Q4 is turned on, that is, the fourth control circuit 14 is turned on. At this time, the second control circuit 12 is turned off, that is, the high level is an invalid drive signal, and the low level is an effective drive signal.
此时,为了驱动待控制电机正转,正转驱动端口INA应输入有效驱动信号(低电平),使第三控制电路13关闭,第一控制电路11导通,此时,待控制电机的线圈电流从待控制电机的第一端流向待控制电机的第二端,待控制电机实现正转。At this time, in order to drive the motor to be controlled forward, the forward drive port INA should input a valid drive signal (low level) to turn off the third control circuit 13 and turn on the first control circuit 11. At this time, the motor to be controlled The coil current flows from the first end of the motor to be controlled to the second end of the motor to be controlled, and the motor to be controlled realizes forward rotation.
综上所述,本公开提供的电机驱动电路中,正转驱动端口INA与反转驱动端口INB交替的低电平(有效驱动信号)输入实现了待控制电机的正转驱动与反转驱动,使电动牙刷工作,每个控制电路包括开关管与电阻,且没有与开关管并联的二极管,即缓解了现有技术中电机驱动电路运行噪声大的技术问题。In summary, in the motor drive circuit provided by the present disclosure, the alternating low-level (effective drive signal) input of the forward drive port INA and the reverse drive port INB realizes the forward drive and reverse drive of the motor to be controlled. To make the electric toothbrush work, each control circuit includes a switch tube and a resistor, and there is no diode connected in parallel with the switch tube, which alleviates the technical problem of high operating noise of the motor drive circuit in the prior art.
此外,因为不会在开关管的漏-源之间耦合高压,也大大提高了开关管运行的可靠性,进一步地,正转驱动端口INA分别与第一控制电路11和第三控制电路13连接,且设定第一控制电路11与第三控制电路13不能同时导通,更确保了电路的安全运转,反转驱动端口INB也是同样原理,此处不再赘述。In addition, because no high voltage is coupled between the drain and source of the switch tube, the reliability of the operation of the switch tube is greatly improved. Further, the forward drive port INA is connected to the first control circuit 11 and the third control circuit 13 respectively. , And it is set that the first control circuit 11 and the third control circuit 13 cannot be turned on at the same time, which further ensures the safe operation of the circuit. The reverse driving port INB is also the same principle, which will not be repeated here.
上文中为了便于理解仅对第一开关管Q1和第二开关管Q2为PMOS管,第三开关管Q3和第四开关管Q4为NMOS管的情况进行了详细的介绍,用户也可以根据具体情况使用能够实现同样功能的开关管,例如PMOS管可用PNP三极管代替,NMOS管可用NPN三极管代替,本公开不对其进行具体限制,本公开的电机驱动电路也可以应用于其他领域,本公开不对该电路的实施领域进行限制。In order to facilitate understanding, only the first switching tube Q1 and the second switching tube Q2 are PMOS tubes, and the third switching tube Q3 and the fourth switching tube Q4 are NMOS tubes. The user can also refer to the specific situation. Use switch tubes that can achieve the same function. For example, PMOS tubes can be replaced by PNP transistors, and NMOS tubes can be replaced by NPN transistors. The present disclosure does not specifically limit it. The motor drive circuit of the present disclosure can also be applied to other fields. This disclosure does not apply to this circuit. The implementation area is restricted.
在其他的实施方式中,第一开关管Q1和第二开关管Q2可以为NMOS管,第三开关管Q3和第四开关管Q4可以为PMOS管,此时,有效驱动信号为高电平,无效驱动信号为低电平。In other embodiments, the first switching tube Q1 and the second switching tube Q2 may be NMOS tubes, and the third switching tube Q3 and the fourth switching tube Q4 may be PMOS tubes. At this time, the effective driving signal is high. The invalid drive signal is low.
对应地,可以向正转驱动端口INA输入高电平,向反转驱动端口INB输入低电平,以使第一开关管Q1和第四开关管Q4导通,第二开关管Q2和第三开关管Q3关闭。也即,第一控制电路11和第四控制电路14导通,第二控制电路12和第三控制电路14关闭,从而实现待控制电机的正转。Correspondingly, a high level can be input to the forward drive port INA, and a low level can be input to the reverse drive port INB, so that the first switching tube Q1 and the fourth switching tube Q4 are turned on, and the second switching tube Q2 and the third switching tube Q2 are turned on. The switch Q3 is closed. That is, the first control circuit 11 and the fourth control circuit 14 are turned on, and the second control circuit 12 and the third control circuit 14 are turned off, thereby realizing the forward rotation of the motor to be controlled.
可以向正转驱动端口INA输入低电平,向反转驱动端口INB输入高电平,以使第一开关管Q1和第四开关管Q4关闭,第二开关管Q2和第三开关管Q3关闭。也即,第一控制电路11和第四控制电路14关闭,第二控制电路12和第三控制电路13导通,从而实现待控制电机的反转。You can input a low level to the forward drive port INA and a high level to the reverse drive port INB, so that the first switching tube Q1 and the fourth switching tube Q4 are turned off, and the second switching tube Q2 and the third switching tube Q3 are turned off . That is, the first control circuit 11 and the fourth control circuit 14 are turned off, and the second control circuit 12 and the third control circuit 13 are turned on, thereby realizing the reverse rotation of the motor to be controlled.
本公开还提供了一种电机驱动系统,参考图4,该电机驱动系统包括上述的电机驱动电路1和待控制电机2,其中,待控制电机2与电机驱动电路1连接。The present disclosure also provides a motor drive system. Referring to FIG. 4, the motor drive system includes the above-mentioned motor drive circuit 1 and the motor 2 to be controlled, wherein the motor 2 to be controlled is connected to the motor drive circuit 1.
上文中已经详细描述了待控制电机2与电机驱动电路1的连接关系,以及电机驱动电路1如何控制待控制电机2进行正转、反转的过程,具体请参考上文中的描述,此处不再赘述。The connection relationship between the motor 2 to be controlled and the motor drive circuit 1 has been described in detail above, and how the motor drive circuit 1 controls the motor 2 to be controlled to perform forward and reverse rotation. For details, please refer to the above description. Repeat it again.
除非另外具体说明,否则在这些实施例中阐述的部件和步骤的相对步骤、数字表达式和数值并不限制本公开的范围。Unless specifically stated otherwise, the relative steps, numerical expressions and numerical values of components and steps set forth in these embodiments do not limit the scope of the present disclosure.
在这里示出和描述的所有示例中,任何具体值应被解释为仅仅是示例性的,而不是作为限制,因此,示例性实施例的其他示例可以具有不同的值。In all the examples shown and described herein, any specific value should be interpreted as merely exemplary, rather than as a limitation, and therefore, other examples of the exemplary embodiment may have different values.
应注意到:相似的标号和字母在下面的附图中表示类似项,因此,一旦某一项在一个附图中被定义,则在随后的附图中不需要对其进行进一步定义和解释。It should be noted that similar reference numerals and letters indicate similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
附图中的流程图和框图显示了根据本公开的多个实施例的系统、方法和计算机程序产品的可能实现的体系架构、功能和操作。在这点上,流程图或框图中的每个方框可以代表一个模块、程序段或代码的一部分,所述模块、程序段或代码的一部分包含一个或多个用于实现规定的逻辑功能的可执行指令。也应当注意,在有些作为替换的实现中,方框中所标注的功能也可以以不同于附图中所标注的顺序发生。例如,两个连续的方框实际上可以基本并行地执行,它们有时也可以按相反的顺序执行,这依所涉及的功能而定。也要注意的是,框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合,可以用执行规定的功能或动作的专用的基于硬件的系统来实现,或者可以用专用硬件与计算机指令的组合来实现。The flowcharts and block diagrams in the drawings show the possible implementation architecture, functions, and operations of the system, method, and computer program product according to multiple embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, program segment, or part of the code, and the module, program segment, or part of the code contains one or more functions for realizing the specified logical function. Executable instructions. It should also be noted that, in some alternative implementations, the functions marked in the block may also occur in a different order from the order marked in the drawings. For example, two consecutive blocks can actually be executed in parallel, or they can sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and/or flowchart, and the combination of the blocks in the block diagram and/or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions Or it can be realized by a combination of dedicated hardware and computer instructions.
另外,在本公开的描述中,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本公开中的具体含义。In addition, in the description of the present disclosure, unless otherwise clearly defined and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or Integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood in specific situations.
在本公开的描述中,需要说明的是,术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本公开和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本公开的限制。此外,术语“第一”、“第二”、“第三”仅用于描述目的,而不能理解为指示或暗示相对重要性。In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be construed as limiting the present disclosure. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,又例如,多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些通信接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation. For example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some communication interfaces, indirect coupling or communication connection of the devices or units, and may be in electrical, mechanical or other forms.
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
另外,在本公开各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。In addition, the functional units in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个处理器可执行的非易失的计算机可读取存储介质中。基于这样的理解,本公开的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本公开各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。If the function is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a nonvolatile computer readable storage medium executable by a processor. Based on this understanding, the technical solution of the present disclosure essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .
最后应说明的是:以上所述实施例,仅为本公开的具体实施方式,用以说明本公开的技术方案,而非对其限制,本公开的保护范围并不局限于此,尽管参照前述实施例对本公开进行了详细的说明,本领域的普通技术人员应当理解:任何熟悉本技术领域的技术人员在本公开揭露的技术范围内,其依然可以对前述实施例所记载的技术方案进行修改或可轻易想到变化,或者对其中部分技术特征进行等同替换;而这些修改、变化或者替换,并不使相应技术方案的本质脱离本公开技术方案的精神和范围,都应涵盖在本公开的保护范围之内。因此,本公开的保护范围应所述以权利要求的保护范围为准。Finally, it should be noted that the above-mentioned embodiments are only specific implementations of the present disclosure, which are used to illustrate the technical solutions of the present disclosure, but not to limit it. The protection scope of the present disclosure is not limited thereto, although referring to the foregoing The embodiments give a detailed description of the present disclosure, and those of ordinary skill in the art should understand that any person skilled in the art can still modify the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present disclosure. Or it can be easily conceived of changes, or equivalent replacement of some of the technical features; and these modifications, changes or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the present disclosure, and should be covered by the protection of the present disclosure Within range. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.
本公开提供的电机驱动电路及系统,能够在正转驱动端口和反转驱动端口均没有有效驱动信号输入时,通过第三控制电路和第四控制电路将待控制电机的电感电流传输至地,避免了通过二极管对电机的电感电流进行续流所导致的噪声大的问题。The motor drive circuit and system provided by the present disclosure can transmit the inductance current of the motor to be controlled to the ground through the third control circuit and the fourth control circuit when there is no effective drive signal input at the forward drive port and the reverse drive port. The problem of large noise caused by the freewheeling of the inductance current of the motor through the diode is avoided.
Claims (15)
- 一种电机驱动电路,其特征在于,应用于电动牙刷,包括:正转驱动端口、反转驱动端口、第一控制电路、第二控制电路、第三控制电路和第四控制电路;A motor drive circuit, characterized in that it is applied to an electric toothbrush, and includes: a forward rotation drive port, a reverse rotation drive port, a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit;所述第一控制电路的第一端与供电电源连接,所述第一控制电路的第二端与所述正转驱动端口连接,所述第一控制电路的第三端与待控制电机的第一端连接;The first end of the first control circuit is connected to the power supply, the second end of the first control circuit is connected to the forward drive port, and the third end of the first control circuit is connected to the first end of the motor to be controlled. One end connected所述第二控制电路的第一端与所述供电电源连接,所述第二控制电路的第二端与所述反转驱动端口连接,所述第二控制电路的第三端与所述待控制电机的第二端连接;The first end of the second control circuit is connected to the power supply, the second end of the second control circuit is connected to the inversion drive port, and the third end of the second control circuit is connected to the standby The second end of the control motor is connected;所述第三控制电路的第一端与所述正转驱动端口连接,所述第三控制电路的第二端与所述待控制电机的第一端连接,所述第三控制电路的第三端与接地端连接;The first end of the third control circuit is connected to the forward drive port, the second end of the third control circuit is connected to the first end of the motor to be controlled, and the third end of the third control circuit is connected to the first end of the motor to be controlled. The terminal is connected to the ground terminal;所述第四控制电路的第一端与所述反转驱动端口连接,所述第四控制电路的第二端与所述待控制电机的第二端连接,所述第四控制电路的第三端与接地端连接;The first end of the fourth control circuit is connected to the reverse drive port, the second end of the fourth control circuit is connected to the second end of the motor to be controlled, and the third end of the fourth control circuit is The terminal is connected to the ground terminal;当所述正转驱动端口与所述反转驱动端口均没有有效驱动信号输入时,所述第一控制电路与所述第二控制电路关闭,所述待控制电机上的电流通过所述第三控制电路与所述第四控制电路传输至接地端,以使所述待控制电机停止运行,其中,所述第三控制电路和第四控制电路包括电阻和开关管。When neither the forward drive port nor the reverse drive port has a valid drive signal input, the first control circuit and the second control circuit are closed, and the current on the motor to be controlled passes through the third The control circuit and the fourth control circuit are transmitted to the ground terminal to stop the motor to be controlled, wherein the third control circuit and the fourth control circuit include a resistor and a switch tube.
- 根据权利要求1所述的电机驱动电路,其特征在于,所述第三控制电路和所述第四控制电路不包括二极管。The motor drive circuit according to claim 1, wherein the third control circuit and the fourth control circuit do not include diodes.
- 根据权利要求1或2所述的电机驱动电路,其特征在于,所述第一控制电路和所述第二控制电路的导通电平为第一电平,所述第三控制电路和所述第四控制电路的导通电平为第二电平;其中,所述第一电平和所述第二电平的其中一个为高电平,另一个为低电平。The motor drive circuit according to claim 1 or 2, wherein the conduction level of the first control circuit and the second control circuit is a first level, and the third control circuit and the The conduction level of the fourth control circuit is a second level; wherein, one of the first level and the second level is a high level, and the other is a low level.
- 根据权利要求3所述的电机驱动电路,其特征在于,当所述正转驱动端口有有效驱动信号输入,且所述反转驱动端口没有有效驱动信号输入时,所述第一控制电路和所述第四控制电路导通,所述第二控制电路和所述第三控制电路关闭,使得所述待控制电机正转;The motor drive circuit of claim 3, wherein when the forward drive port has a valid drive signal input, and the reverse drive port has no effective drive signal input, the first control circuit and the The fourth control circuit is turned on, and the second control circuit and the third control circuit are turned off, so that the motor to be controlled rotates forward;当所述正转驱动端口没有有效驱动信号输入,且所述反转驱动端口有有效驱动信号输入时,所述第二控制电路和所述第三控制电路导通,所述第一控制电路和所述第四控制电路关闭,使得所述待控制电机反转;When the forward drive port has no effective drive signal input and the reverse drive port has an effective drive signal input, the second control circuit and the third control circuit are turned on, and the first control circuit and The fourth control circuit is closed, so that the motor to be controlled reverses;所述有效驱动信号为所述第一电平和所述第二电平的其中一个。The effective driving signal is one of the first level and the second level.
- 根据权利要求1-4中任意一项所述的电机驱动电路,其特征在于,所述第一控制电路包括:第一开关管、第一电阻和第二电阻;The motor drive circuit according to any one of claims 1-4, wherein the first control circuit comprises: a first switch tube, a first resistor, and a second resistor;其中,所述第一开关管的源极分别与所述供电电源和所述第一电阻的第一端连接,所述第一电阻的第二端分别与所述第二电阻的第一端和所述第一开关管的栅极连接,所述第二电阻的第二端与所述正转驱动端口连接;Wherein, the source of the first switch tube is respectively connected to the power supply and the first end of the first resistor, and the second end of the first resistor is respectively connected to the first end and the first end of the second resistor. The gate of the first switch tube is connected, and the second end of the second resistor is connected to the forward drive port;所述第一开关管的漏极与所述待控制电机的第一端连接。The drain of the first switch tube is connected to the first end of the motor to be controlled.
- 根据权利要求1-5中任意一项所述的电机驱动电路,其特征在于,所述第二控制电路包括:第二开关管、第三电阻和第四电阻;The motor drive circuit according to any one of claims 1-5, wherein the second control circuit comprises: a second switch tube, a third resistor, and a fourth resistor;其中,所述第二开关管的源极分别与所述供电电源和所述第三电阻的第一端连接,所述第三电阻的第二端分别与所述第四电阻的第一端和所述第二开关管的栅极连接,所述第四电阻的第二端与所述反转驱动端口连接;Wherein, the source of the second switch tube is respectively connected to the power supply and the first end of the third resistor, and the second end of the third resistor is respectively connected to the first end and the first end of the fourth resistor. The gate of the second switch tube is connected, and the second end of the fourth resistor is connected to the inversion drive port;所述第二开关管的漏极与所述待控制电机的第二端连接。The drain of the second switch tube is connected to the second end of the motor to be controlled.
- 根据权利要求1-6中任意一项所述的电机驱动电路,其特征在于,所述第三控制电路包括:第三开关管、第五电阻和第六电阻;The motor drive circuit according to any one of claims 1-6, wherein the third control circuit comprises: a third switch tube, a fifth resistor, and a sixth resistor;其中,所述第五电阻的第一端与所述正转驱动端口连接,所述第五电阻的第二端分别与所述第六电阻的第一端和所述第三开关管的栅极连接,所述第六电阻的第二端与分别所述第三开关管的源极和接地端连接;Wherein, the first end of the fifth resistor is connected to the forward drive port, and the second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the gate of the third switch tube. Connected, the second end of the sixth resistor is connected to the source and the ground of the third switch tube;所述第三开关管的漏极与所述待控制电机的第一端连接。The drain of the third switch tube is connected to the first end of the motor to be controlled.
- 根据权利要求1-7中任意一项所述的电机驱动电路,其特征在于,所述第四控制电路包括:第四开关管、第七电阻和第八电阻;The motor drive circuit according to any one of claims 1-7, wherein the fourth control circuit comprises: a fourth switch tube, a seventh resistor, and an eighth resistor;其中,所述第七电阻的第一端与所述反转驱动端口连接,所述第七电阻的第二端分别与所述第八电阻的第一端和所述第四开关管的栅极连接,所述第八电阻的第二端与分别所述第四开关管的源极和接地端连接;Wherein, the first end of the seventh resistor is connected to the inversion drive port, and the second end of the seventh resistor is respectively connected to the first end of the eighth resistor and the gate of the fourth switch tube. Connected, the second end of the eighth resistor is connected to the source and the ground of the fourth switch tube;所述第四开关管的漏极与所述待控制电机的第二端连接。The drain of the fourth switch tube is connected to the second end of the motor to be controlled.
- 根据权利要求5所述的电机驱动电路,其特征在于,所述第一开关管包括:PMOS管。The motor drive circuit according to claim 5, wherein the first switch tube comprises: a PMOS tube.
- 根据权利要求6所述的电机驱动电路,其特征在于,所述第二开关管包括:PMOS 管。The motor drive circuit according to claim 6, wherein the second switch tube comprises a PMOS tube.
- 根据权利要求7所述的电机驱动电路,其特征在于,所述第三开关管包括:NMOS管。The motor drive circuit according to claim 7, wherein the third switch tube comprises: an NMOS tube.
- 根据权利要求8所述的电机驱动电路,其特征在于,所述第四开关管包括:NMOS管。The motor drive circuit according to claim 8, wherein the fourth switch tube comprises: an NMOS tube.
- 根据权利要求9-12中任意一项所述的电机驱动电路,其特征在于,所述有效驱动信号为低电平。The motor drive circuit according to any one of claims 9-12, wherein the effective drive signal is a low level.
- 根据权利要求3-8中任意一项所述的电机驱动电路,其特征在于,所述有效驱动信号为高电平,所述第一控制电路和所述第二控制电路均采用NMOS管作为开关管,所述第三控制电路和所述第四控制电路均采用PMOS管作为开关管。The motor drive circuit according to any one of claims 3-8, wherein the effective drive signal is a high level, and the first control circuit and the second control circuit both use NMOS transistors as switches Tube, the third control circuit and the fourth control circuit both use PMOS tubes as switching tubes.
- 一种电机驱动系统,所述系统包括上述权利要求1至14中任一项所述的电机驱动电路,还包括:待控制电机;A motor drive system, the system comprising the motor drive circuit of any one of claims 1 to 14, and further comprising: a motor to be controlled;所述待控制电机与所述电机驱动电路连接。The motor to be controlled is connected to the motor drive circuit.
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Citations (4)
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CN102843075A (en) * | 2011-06-24 | 2012-12-26 | 中国石油化工股份有限公司 | Novel underground motor drive circuit |
CN204761334U (en) * | 2015-06-04 | 2015-11-11 | 苏州希迩迈电子有限公司 | Motor control circuit |
CN207884525U (en) * | 2018-02-09 | 2018-09-18 | 广州帆宇工程勘测有限公司 | A kind of motor positive inversion control circuit |
CN109818533A (en) * | 2019-03-28 | 2019-05-28 | 广州皓醒湾科技有限公司 | Motor-drive circuit and system |
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JP2000236684A (en) * | 1999-02-16 | 2000-08-29 | Sanyo Electric Co Ltd | Drive circuit for motor |
CN203675019U (en) * | 2014-01-26 | 2014-06-25 | 青岛罗博飞海洋技术有限公司 | Drive circuit of brushless motor |
CN206992988U (en) * | 2017-07-07 | 2018-02-09 | 广州视源电子科技股份有限公司 | Direct current motor drive circuit |
CN107488987B (en) * | 2017-09-08 | 2020-05-19 | 无锡小天鹅电器有限公司 | Washing machine and motor and control device thereof |
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- 2019-03-28 CN CN201910243365.XA patent/CN109818533A/en active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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CN102843075A (en) * | 2011-06-24 | 2012-12-26 | 中国石油化工股份有限公司 | Novel underground motor drive circuit |
CN204761334U (en) * | 2015-06-04 | 2015-11-11 | 苏州希迩迈电子有限公司 | Motor control circuit |
CN207884525U (en) * | 2018-02-09 | 2018-09-18 | 广州帆宇工程勘测有限公司 | A kind of motor positive inversion control circuit |
CN109818533A (en) * | 2019-03-28 | 2019-05-28 | 广州皓醒湾科技有限公司 | Motor-drive circuit and system |
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