Motor drive circuit

Abstract

The utility model discloses a motor drive circuit which comprises an input protection circuit, a master control circuit, a U-phase voltage output circuit, a V-phase voltage output circuit, a W-phase voltage output circuit and a detection circuit. According to the invention, the input protection circuit carries out voltage division on the input signal sent to the master control circuit, thereby effectively preventing the voltage value of the input signal from being too large, and preventing the master control circuit from being burnt out. Meanwhile, the detection circuit can obtain the U-phase voltage output by the U-phase voltage output circuit, the V-phase voltage output by the V-phase voltage output circuit and the W-phase voltage output by the W-phase voltage output circuit in real time, and the use efficiency of the drive circuit is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrode driving, in particular to a motor driving circuit. Background Art

[0002] The motor can be applied in different fields, for example, it can be installed on the bottom of a surfboard to drive the surfboard to move, or installed on an electric vehicle to drive the wheels to rotate. In the prior art, the drive circuit used to drive the motor often directly gives the input signal to the drive circuit. If the unprocessed input signal is given to the drive circuit, the main control circuit in the drive circuit will be burned out. At the same time, the existing drive circuit does not have the ability to detect the size of the three-phase voltage it outputs in real time. All of the above greatly reduces the efficiency of the drive circuit. Utility Model Content

[0003] Based on this, it is necessary to propose a motor drive circuit to address the above problems.

[0004] A motor drive circuit, comprising:

[0005] An input protection circuit, the input end of which is used to receive an input signal, and the output end of which is connected to the input end of the main control circuit, and is used to divide the input signal and then output it to the main control circuit;

[0006] The main control circuit, the output end of which is connected to the input end of the U-phase voltage output circuit, the input end of the V-phase voltage output circuit and the input end of the W-phase voltage output circuit, is used to receive the divided input signal, and output the first voltage and the second voltage to the U-phase voltage output circuit, output the third voltage and the fourth voltage to the V-phase voltage output circuit, and output the fifth voltage and the sixth voltage to the W-phase voltage output circuit;

[0007] The U-phase voltage output circuit has an output end connected to the U-phase of the motor, is used to receive the first voltage and the second voltage, and output the U-phase voltage to the motor;

[0008] The V-phase voltage output circuit, whose output end is connected to the V-phase of the motor, is used to receive the third voltage and the fourth voltage, and output the V-phase voltage to the motor;

[0009] The W-phase voltage output circuit, whose output end is connected to the W-phase of the motor, is used to receive the fifth voltage and the sixth voltage, and output the W-phase voltage to the motor;

[0010] A detection circuit, whose input end is connected to the output end of the U-phase voltage output circuit, the output end of the V-phase voltage output circuit and the output end of the W-phase voltage output circuit, and whose output end is connected to the input end of the main control circuit, is used to obtain the U-phase voltage output by the U-phase voltage output circuit, the V-phase voltage output by the V-phase voltage output circuit and the W-phase voltage output by the W-phase voltage output circuit, and output the U-phase voltage, the V-phase voltage and the W-phase voltage to the main control circuit.

[0011] In one embodiment, the motor drive circuit further includes:

[0012] An emergency stop circuit, whose output end is connected to the input end of the main control circuit, is used to output a control signal to the main control circuit. The main control circuit is also used to receive the control signal and stop outputting the first voltage and the second voltage to the U-phase voltage output circuit, stop outputting the third voltage and the fourth voltage to the V-phase voltage output circuit, and stop outputting the fifth voltage and the sixth voltage to the W-phase voltage output circuit.

[0013] In one embodiment, the main control circuit includes: a main control chip;

[0014] The first output terminal and the second output terminal of the main control chip are connected to the input terminal of the U-phase voltage output circuit;

[0015] The third output terminal and the fourth output terminal of the main control chip are connected to the input terminal of the V-phase voltage output circuit;

[0016] The fifth output terminal and the sixth output terminal of the main control chip are connected to the input terminal of the W-phase voltage output circuit;

[0017] The first input terminal of the main control chip is connected to the output terminal of the input protection circuit.

[0018] In one embodiment,

[0019] The U-phase voltage output circuit comprises: a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a sixth triode, a first MOS tube and a second MOS tube;

[0020] The V-phase voltage output circuit includes: a seventh triode, an eighth triode, a ninth triode, a tenth triode, an eleventh triode, a twelfth triode, a third MOS tube and a fourth MOS tube;

[0021] The W-phase voltage output circuit includes: a thirteenth transistor, a fourteenth transistor, a fifteenth transistor, a sixteenth transistor, a seventeenth transistor, an eighteenth transistor, a fifth MOS transistor and a sixth MOS transistor;

[0022] The base of the fourth transistor is connected to the second output terminal of the main control chip, the collector of the fourth transistor is connected to the base of the first transistor, and the emitter of the fourth transistor is grounded;

[0023] The emitter of the first transistor is connected to an external power supply, and the collector of the first transistor is connected to the base of the second transistor;

[0024] The emitter of the second triode is connected to the gate of the first MOS tube, and the collector of the second triode is connected to the gate of the first MOS tube and the motor;

[0025] The source of the first MOS tube is connected to the external power supply, and the drain of the first MOS tube and the source of the second MOS tube are connected to the motor;

[0026] The base of the fifth transistor is connected to the external power supply, the collector of the fifth transistor is connected to the base of the third transistor and the external power supply, and the emitter of the fifth transistor is connected to the base of the sixth transistor and the first output end of the main control chip;

[0027] The collector of the third transistor is connected to the collector of the sixth transistor and the gate of the second MOS transistor, and the emitter of the third transistor is connected to an external power supply;

[0028] The emitter of the sixth triode is grounded;

[0029] The source of the second MOS tube is connected to the motor, and the drain of the second MOS tube is grounded;

[0030] The base of the thirteenth transistor is connected to the fourth output terminal of the main control chip, the collector of the thirteenth transistor is connected to the base of the seventh transistor, and the emitter of the thirteenth transistor is grounded;

[0031] The emitter of the seventh transistor is connected to an external power supply, and the collector of the seventh transistor is connected to the base of the eighth transistor;

[0032] The emitter of the eighth transistor is connected to the gate of the third MOS transistor, and the collector of the eighth transistor is connected to the gate of the third MOS transistor and the motor;

[0033] The source of the third MOS tube is connected to the external power supply, and the drain of the third MOS tube and the source of the fourth MOS tube are connected to the motor;

[0034] The base of the eleventh transistor is connected to the external power supply, the collector of the eleventh transistor is connected to the base of the ninth transistor and the external power supply, and the emitter of the eleventh transistor is connected to the base of the twelfth transistor and the third output terminal of the main control chip;

[0035] The collector of the ninth transistor is connected to the collector of the twelfth transistor and the gate of the fourth MOS transistor, and the emitter of the ninth transistor is connected to an external power supply;

[0036] The emitter of the twelfth transistor is grounded;

[0037] The source of the fourth MOS tube is connected to the motor, and the drain of the fourth MOS tube is grounded;

[0038] The base of the thirteenth transistor is connected to the sixth output terminal of the main control chip, the collector of the thirteenth transistor is connected to the base of the seventh transistor, and the emitter of the thirteenth transistor is grounded;

[0039] The emitter of the seventh transistor is connected to an external power supply, and the collector of the seventh transistor is connected to the base of the eighth transistor;

[0040] The emitter of the eighth transistor is connected to the gate of the third MOS transistor, and the collector of the eighth transistor is connected to the gate of the third MOS transistor and the motor;

[0041] The source of the third MOS tube is connected to the external power supply, and the drain of the third MOS tube and the source of the fourth MOS tube are connected to the motor;

[0042] The base of the eleventh transistor is connected to the external power supply, the collector of the eleventh transistor is connected to the base of the ninth transistor and the external power supply, and the emitter of the eleventh transistor is connected to the base of the twelfth transistor and the fifth output terminal of the main control chip;

[0043] The collector of the ninth transistor is connected to the collector of the twelfth transistor and the gate of the fourth MOS transistor, and the emitter of the ninth transistor is connected to an external power supply;

[0044] The emitter of the twelfth transistor is grounded;

[0045] The source of the fourth MOS tube is connected to the motor, and the drain of the fourth MOS tube is grounded.

[0046] In one embodiment,

[0047] The U-phase voltage output circuit further includes: a first diode, a second diode, a first resistor and a second resistor;

[0048] The V-phase voltage output circuit further includes: a third diode, a fourth diode, a third resistor and a fourth resistor;

[0049] The W-phase voltage output circuit further includes: a fifth diode, a sixth diode, a fifth resistor and a sixth resistor;

[0050] The anode of the first diode is connected to the external power supply, and the cathode of the first diode is connected to the collector of the fourth transistor;

[0051] The anode of the second diode is connected to the base of the second transistor, the cathode of the second diode is connected to one end of the first resistor, and the other end of the first resistor is connected to the emitter of the second transistor;

[0052] One end of the second resistor is connected to the anode of the second diode, and the other end of the second resistor is connected to the collector of the second transistor;

[0053] The anode of the first diode is connected to the external power supply, and the cathode of the first diode is connected to the collector of the fourth transistor;

[0054] The anode of the second diode is connected to the base of the second transistor, the cathode of the second diode is connected to one end of the first resistor, and the other end of the first resistor is connected to the emitter of the second transistor;

[0055] One end of the second resistor is connected to the anode of the second diode, and the other end of the second resistor is connected to the collector of the second transistor;

[0056] The anode of the first diode is connected to the external power supply, and the cathode of the first diode is connected to the collector of the fourth transistor;

[0057] The anode of the second diode is connected to the base of the second transistor, the cathode of the second diode is connected to one end of the first resistor, and the other end of the first resistor is connected to the emitter of the second transistor;

[0058] One end of the second resistor is connected to the anode of the second diode, and the other end of the second resistor is connected to the collector of the second transistor.

[0059] In one embodiment,

[0060] The U-phase voltage output circuit further includes: a first capacitor, a second capacitor, a third capacitor and a seventh resistor;

[0061] The V-phase voltage output circuit further includes: a fourth capacitor, a fifth capacitor, a sixth capacitor and an eighth resistor;

[0062] The W-phase voltage output circuit further includes: a seventh capacitor, an eighth capacitor, a ninth capacitor and a ninth resistor;

[0063] One end of the first capacitor is connected to the emitter of the first transistor, and the other end of the first capacitor is connected to the collector of the second transistor;

[0064] One end of the second capacitor is connected to the gate of the first MOS transistor, and the other end of the second capacitor is connected to the drain of the first MOS transistor;

[0065] One end of the third capacitor is connected to the gate of the second MOS transistor, and the other end of the third capacitor is connected to the drain of the second MOS transistor;

[0066] One end of the seventh resistor is connected to the other end of the first capacitor, and the other end of the seventh resistor is connected to the drain of the second MOS tube;

[0067] One end of the first capacitor is connected to the emitter of the first transistor, and the other end of the first capacitor is connected to the collector of the second transistor;

[0068] One end of the second capacitor is connected to the gate of the first MOS transistor, and the other end of the second capacitor is connected to the drain of the first MOS transistor;

[0069] One end of the third capacitor is connected to the gate of the second MOS transistor, and the other end of the third capacitor is connected to the drain of the second MOS transistor;

[0070] One end of the seventh resistor is connected to the other end of the first capacitor, and the other end of the seventh resistor is connected to the drain of the second MOS tube;

[0071] One end of the first capacitor is connected to the emitter of the first transistor, and the other end of the first capacitor is connected to the collector of the second transistor;

[0072] One end of the second capacitor is connected to the gate of the first MOS transistor, and the other end of the second capacitor is connected to the drain of the first MOS transistor;

[0073] One end of the third capacitor is connected to the gate of the second MOS transistor, and the other end of the third capacitor is connected to the drain of the second MOS transistor;

[0074] One end of the seventh resistor is connected to the other end of the first capacitor, and the other end of the seventh resistor is connected to the drain of the second MOS tube.

[0075] In one embodiment,

[0076] The emergency stop circuit comprises: a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, an eighteenth transistor, a seventh diode and a tenth capacitor;

[0077] One end of the tenth resistor is connected to an external power supply, and the other end of the tenth resistor is connected to the anode of the seventh diode, one end of the twelfth resistor, one end of the eleventh resistor and one end of the tenth capacitor;

[0078] The other end of the twelfth resistor is connected to the input end of the main control circuit;

[0079] The other end of the eleventh resistor is connected to the collector of the eighteenth transistor;

[0080] The other end of the tenth capacitor is grounded;

[0081] The cathode of the seventh diode is connected to the button;

[0082] The emitter of the eighteenth transistor is grounded, and the base of the eighteenth transistor is connected to one end of the fourteenth resistor;

[0083] The other end of the fourteenth resistor is connected to the button;

[0084] One end of the thirteenth resistor is connected to the base of the eighteenth transistor, and the other end of the thirteenth resistor is grounded.

[0085] In one embodiment,

[0086] The detection circuit includes: a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor and a nineteenth resistor;

[0087] One end of the seventeenth resistor is connected to the output end of the U-phase voltage output circuit, and the other end of the seventeenth resistor is connected to the input end of the main control circuit;

[0088] One end of the eighteenth resistor is connected to the output end of the V-phase voltage output circuit, and the other end of the eighteenth resistor is connected to the input end of the main control circuit;

[0089] One end of the nineteenth resistor is connected to the output end of the W-phase voltage output circuit, and the other end of the nineteenth resistor is connected to the input end of the main control circuit;

[0090] One end of the fourteenth resistor is connected to one end of the nineteenth resistor, and the other end of the fourteenth resistor is connected to an external power supply;

[0091] One end of the fifteenth resistor is connected to one end of the eighteenth resistor, and the other end of the fifteenth resistor is connected to an external power supply;

[0092] One end of the sixteenth resistor is connected to one end of the seventeenth resistor, and the other end of the sixteenth resistor is connected to an external power supply.

[0093] In one embodiment, the detection circuit further includes: an eleventh capacitor, a twelfth capacitor and a thirteenth capacitor;

[0094] One end of the eleventh capacitor is connected to the other end of the seventeenth resistor, and the other end of the eleventh capacitor is grounded;

[0095] One end of the twelfth capacitor is connected to the other end of the eighteenth resistor, and the other end of the twelfth capacitor is grounded;

[0096] One end of the thirteenth capacitor is connected to the other end of the nineteenth resistor, and the other end of the thirteenth capacitor is grounded.

[0097] In one embodiment,

[0098] The input protection circuit comprises: a twentieth resistor, a twenty-first resistor and a fourteenth capacitor;

[0099] One end of the 20th resistor is connected to the input end of the main control circuit, and the other end of the 20th resistor is connected to the input signal;

[0100] One end of the twenty-first resistor is connected to the other end of the twenty-first resistor, and the other end of the twenty-first resistor is grounded;

[0101] The fourteenth capacitor is connected in parallel with the twenty-first resistor.

[0102] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0103] The input protection circuit receives the input signal, divides the input signal and outputs it to the main control circuit; the main control circuit receives the divided input signal, and outputs the first voltage and the second voltage to the U-phase voltage output circuit, outputs the third voltage and the fourth voltage to the V-phase voltage output circuit, and outputs the fifth voltage and the sixth voltage to the W-phase voltage output circuit; the U-phase voltage output circuit receives the first voltage and the second voltage, and outputs the U-phase voltage to the motor; the V-phase voltage output circuit receives the third voltage and the fourth voltage, and outputs the V-phase voltage to the motor; the W-phase voltage output circuit receives the fifth voltage and the sixth voltage, and outputs the W-phase voltage to the motor; the detection circuit obtains the U-phase voltage output by the U-phase voltage output circuit, the V-phase voltage output by the V-phase voltage output circuit and the W-phase voltage output by the W-phase voltage output circuit, and outputs the U-phase voltage, the V-phase voltage and the W-phase voltage to the main control circuit. The present application divides the input signal given to the main control circuit through the input protection circuit, which effectively avoids the voltage value of the input signal being too large and burning out the main control circuit; at the same time, the detection circuit can obtain the U-phase voltage output by the U-phase voltage output circuit, the V-phase voltage output by the V-phase voltage output circuit, and the W-phase voltage output by the W-phase voltage output circuit in real time, effectively improving the utilization efficiency of the drive circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0104] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0105] in:

[0106] Figure 1 is a structural block diagram of a motor drive circuit in one embodiment;

[0107] Figure 2 is a structural block diagram of a motor driving circuit in another embodiment;

[0108] Figure 3 is a circuit diagram of a main control circuit in one embodiment;

[0109] Figure 4 is a circuit diagram of a U-phase voltage output circuit, a V-phase voltage output circuit and a W-phase voltage output circuit in one embodiment;

[0110] Figure 5 is a circuit diagram of an emergency stop circuit in one embodiment;

[0111] Figure 6 is a circuit diagram of a detection circuit in one embodiment;

[0112] Figure 7 A circuit diagram of an input protection circuit in one embodiment;

[0113] Figure 8 FIG. 4 is a schematic diagram of an application of a motor driving circuit in an embodiment. DETAILED DESCRIPTION

[0114] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0115] The motor can be applied in different fields, such as being installed at the bottom of a surfboard to drive the surfboard, or being installed on an electric vehicle to drive the wheels to rotate. In the prior art, the drive circuit used to drive the motor often directly gives the input signal to the drive circuit. If the unprocessed input signal is given to the drive circuit, the main control circuit in the drive circuit will burn out. At the same time, the existing drive circuit does not have the ability to detect the size of the three-phase voltage it outputs in real time. All of the above greatly reduce the efficiency of the drive circuit. In order to solve the technical problem of Shanghai Su, the present application provides a motor drive circuit, such as Figure 1As shown, it includes: an input protection circuit 70, a main control circuit 10, a U-phase voltage output circuit 20, a V-phase voltage output circuit 30, a W-phase voltage output circuit 40 and a detection circuit 60, wherein the input end of the input protection circuit 70 is used to access the input signal, and the output end is connected to the input end of the main control circuit 10, and is used to divide the input signal and output it to the main control circuit 10; the output end of the main control circuit 10 is connected to the input end of the U-phase voltage output circuit 20, the input end of the V-phase voltage output circuit 30 and the input end of the W-phase voltage output circuit 40, and is used to receive the input signal after voltage division, and output the first voltage and the second voltage to the U-phase voltage output circuit 20, output the third voltage and the fourth voltage to the V-phase voltage output circuit 30, and output the fifth voltage and the sixth voltage to the W-phase voltage output circuit 40; the output end of the U-phase voltage output circuit 20 is connected to the U phase of the motor, and is used to receive the first voltage. voltage and the second voltage, and outputs the U-phase voltage to the motor; the output end of the V-phase voltage output circuit 30 is connected to the V-phase of the motor, for receiving the third voltage and the fourth voltage, and outputting the V-phase voltage to the motor; the output end of the W-phase voltage output circuit 40 is connected to the W-phase of the motor, for receiving the fifth voltage and the sixth voltage, and outputting the W-phase voltage to the motor; the input end of the detection circuit 60 is connected to the output end of the U-phase voltage output circuit 20, the output end of the V-phase voltage output circuit 30 and the output end of the W-phase voltage output circuit 40, and the output end is connected to the input end of the main control circuit 10, for obtaining the U-phase voltage output by the U-phase voltage output circuit 20, the V-phase voltage output by the V-phase voltage output circuit 30 and the W-phase voltage output by the W-phase voltage output circuit 40, and outputting the U-phase voltage, the V-phase voltage and the W-phase voltage to the main control circuit 10. The input protection circuit receives the input signal, divides the input signal and outputs it to the main control circuit; the main control circuit receives the divided input signal, and outputs the first voltage and the second voltage to the U-phase voltage output circuit, outputs the third voltage and the fourth voltage to the V-phase voltage output circuit, and outputs the fifth voltage and the sixth voltage to the W-phase voltage output circuit; the U-phase voltage output circuit receives the first voltage and the second voltage, and outputs the U-phase voltage to the motor; the V-phase voltage output circuit receives the third voltage and the fourth voltage, and outputs the V-phase voltage to the motor; the W-phase voltage output circuit receives the fifth voltage and the sixth voltage, and outputs the W-phase voltage to the motor; the detection circuit obtains the U-phase voltage output by the U-phase voltage output circuit, the V-phase voltage output by the V-phase voltage output circuit and the W-phase voltage output by the W-phase voltage output circuit, and outputs the U-phase voltage, the V-phase voltage and the W-phase voltage to the main control circuit.The present application divides the input signal given to the main control circuit through the input protection circuit, which effectively avoids the voltage value of the input signal being too large and burning out the main control circuit; at the same time, the detection circuit can obtain the U-phase voltage output by the U-phase voltage output circuit, the V-phase voltage output by the V-phase voltage output circuit, and the W-phase voltage output by the W-phase voltage output circuit in real time, effectively improving the utilization efficiency of the drive circuit.

[0116] In one embodiment, Figure 2 As shown, the motor drive circuit further includes: an emergency stop circuit 50, wherein the output end of the emergency stop circuit 50 is connected to the input end of the main control circuit 10, and is used to output a control signal to the main control circuit 10, and the main control circuit 10 is also used to receive the control signal, and stop outputting the first voltage and the second voltage to the U-phase voltage output circuit, stop outputting the third voltage and the fourth voltage to the V-phase voltage output circuit 30, and stop outputting the fifth voltage and the sixth voltage to the W-phase voltage output circuit 40.

[0117] In one embodiment, Figure 3 As shown, the main control circuit 10 includes: a main control chip U1; wherein the first output terminal P2.5 and the second output terminal P2.2 of the main control chip U1 are connected to the input terminal of the U-phase voltage output circuit 20; the third output terminal P2.4 and the fourth output terminal P2.1 of the main control chip U1 are connected to the input terminal of the V-phase voltage output circuit 30; the fifth output terminal P2.3 and the sixth output terminal P2.0 of the main control chip U1 are connected to the input terminal of the W-phase voltage output circuit 40; the first input terminal AN7 of the main control chip U1 is connected to the output terminal of the input protection circuit 70.

[0118] In one embodiment, Figure 4As shown, the U-phase voltage output circuit 20 includes: a first transistor PA1, a second transistor PA2, a third transistor PA3, a fourth transistor NA1, a fifth transistor NA2, a sixth transistor NA3, a first MOS transistor V1 and a second MOS transistor V2; the V-phase voltage output circuit 30 includes: a seventh transistor PB1, an eighth transistor PB2, a ninth transistor PB3, a tenth transistor NB1, an eleventh transistor NB2, a twelfth transistor NB3, a third MOS transistor V3 and a fourth MOS transistor V4; the W-phase voltage output circuit 40 includes: a thirteenth transistor PC1, a fourteenth transistor PC2, a fifteenth transistor PC3, a sixteenth transistor NC1, a seventeenth transistor NC2, an eighteenth transistor NC3, a fifth MOS transistor V5 and a sixth MOS transistor V6; wherein the base of the fourth transistor NA1 is connected to the second output terminal P2.2 of the main control chip U1, the collector of the fourth transistor NA1 is connected to the base of the first transistor PA1, and the emitter of the fourth transistor NA1 is grounded; the emitter of the first transistor PA1 is connected to the external power supply, the collector of the first transistor PA1 is connected to the second transistor The base of the fifth transistor NA2 is connected to the external power supply, the collector of the fifth transistor NA2 is connected to the base of the third transistor PA3 and the external power supply, and the drain of the first MOS transistor V1 and the source of the second MOS transistor V2 are connected to the motor; the base of the fifth transistor NA2 is connected to the external power supply, the collector of the fifth transistor NA2 is connected to the base of the third transistor PA3 and the external power supply, and the drain of the first MOS transistor V1 and the source of the second MOS transistor V2 are connected to the motor. The emitter of the transistor NA2 is connected to the base of the sixth transistor NA3 and the first output terminal P2.5 of the main control chip U1; the collector of the third transistor PA3 is connected to the collector of the sixth transistor NA3 and the gate of the second MOS transistor V2, and the emitter of the third transistor PA3 is connected to an external power supply; the emitter of the sixth transistor NA3 is grounded; the source of the second MOS transistor V2 is connected to the motor, and the drain of the second MOS transistor V2 is grounded; the base of the thirteenth transistor NB1 is connected to the fourth output terminal P2.5 of the main control chip U1.1, the collector of the twelfth transistor NB1 is connected to the base of the seventh transistor PB1, and the emitter of the twelfth transistor NB1 is grounded; the emitter of the seventh transistor PB1 is connected to the external power supply, and the collector of the seventh transistor PB1 is connected to the base of the eighth transistor PB2; the emitter of the eighth transistor PB2 is connected to the gate of the third MOS transistor V3, and the collector of the eighth transistor PB2 is connected to the gate of the third MOS transistor V3 and the motor; the source of the third MOS transistor V3 is connected to the external power supply, and the drain of the third MOS transistor V3 is connected to the source of the fourth MOS transistor V4 and the motor; the base of the eleventh transistor NB2 is connected to the external power supply, and the drain of the third MOS transistor V3 is connected to the source of the fourth MOS transistor V4 and the motor; The collector of the eleventh transistor NB2 is connected to the external power supply, the collector of the eleventh transistor NB2 is connected to the base of the ninth transistor PB3 and the external power supply, the emitter of the eleventh transistor NB2 is connected to the base of the twelfth transistor NB3 and the third output terminal P2.4 of the main control chip U1; the collector of the ninth transistor PB3 is connected to the collector of the twelfth transistor NB3 and the gate of the fourth MOS transistor V4, and the emitter of the ninth transistor PB3 is connected to the external power supply; the emitter of the twelfth transistor NB3 is grounded; the source of the fourth MOS transistor V4 is connected to the motor, and the drain of the fourth MOS transistor V4 is grounded; the base of the eleventh transistor NC1 is connected to the The sixth output terminal P2.0 of the main control chip U1 is connected, the collector of the tenth transistor NC1 is connected to the base of the seventh transistor PC1, and the emitter of the tenth transistor NC1 is grounded; the emitter of the seventh transistor PC1 is connected to the external power supply, and the collector of the seventh transistor PC1 is connected to the base of the eighth transistor PC2; the emitter of the eighth transistor PC2 is connected to the gate of the third MOS tube V5, and the collector of the eighth transistor PC2 is connected to the gate of the third MOS tube V5 and the motor; the source of the third MOS tube V5 is connected to the external power supply, and the drain of the third MOS tube V5 is connected to the source of the fourth MOS tube V6 and the motor. The base of the eleventh transistor NC2 is connected to the external power supply, the collector of the eleventh transistor NC2 is connected to the base of the ninth transistor PC3 and the external power supply, the emitter of the eleventh transistor NC2 is connected to the base of the twelfth transistor NC3 and the fifth output terminal P2.3 of the main control chip U1; the collector of the ninth transistor PC3 is connected to the collector of the twelfth transistor NC3 and the gate of the fourth MOS tube V6, the emitter of the ninth transistor PC3 is connected to the external power supply; the emitter of the twelfth transistor NC3 is grounded; the source of the fourth MOS tube V6 is connected to the motor, and the drain of the fourth MOS tube V6 is grounded. .

[0119] In one embodiment, Figure 4 As shown, the U-phase voltage output circuit 20 also includes: a first diode DA1, a second diode DA2, a first resistor RA4 and a second resistor RA5; the V-phase voltage output circuit 30 also includes: a third diode DB1, a fourth diode DB2, a third resistor RB4 and a fourth resistor RB5; the W-phase voltage output circuit 40 also includes: a fifth diode DC1, a sixth diode DC2, a fifth resistor RC4 and a sixth resistor RC5; wherein, the anode of the first diode DA1 is connected to the external power supply, and the cathode of the first diode DA1 is connected to the collector of the fourth transistor NA1; the anode of the second diode DA2 is connected to the base of the second transistor PA2, the cathode of the second diode DA2 is connected to one end of the first resistor RA4, and the other end of the first resistor RA4 is connected to the emitter of the second transistor PA2; one end of the second resistor RA5 is connected to the anode of the second diode DA2, and the other end of the second resistor RA5 is connected to the collector of the second transistor PA2; the anode of the first diode DB1 is connected to the external power supply, and the cathode of the second diode DA2 is connected to one end of the first resistor RA4, and the other end of the first resistor RA4 is connected to the emitter of the second transistor PA2; the anode of the first diode DB1 is connected to the external power supply, and the cathode of the second diode DA2 is connected to one end of the first resistor RA4, and the other end of the second resistor RA5 is connected to the collector ... The cathode of the first diode DB1 is connected to the collector of the fourth transistor NB1; the anode of the second diode DB2 is connected to the base of the second transistor PB2, the cathode of the second diode DB2 is connected to one end of the first resistor RB4, and the other end of the first resistor RB4 is connected to the emitter of the second transistor PB2; one end of the second resistor RB5 is connected to the anode of the second diode DB2, and the other end of the second resistor RB5 is connected to the collector of the second transistor PB2; the anode of the first diode DC1 is connected to the external power supply, and the cathode of the first diode DC1 is connected to the collector of the fourth transistor NC1; the anode of the second diode DC2 is connected to the base of the second transistor PC2, the cathode of the second diode DC2 is connected to one end of the first resistor RC4, and the other end of the first resistor RC4 is connected to the emitter of the second transistor PC2; one end of the second resistor RC5 is connected to the anode of the second diode DC2, and the other end of the second resistor RC5 is connected to the collector of the second transistor PC2.

[0120] In one embodiment, Figure 4As shown, the U-phase voltage output circuit 20 also includes: a first capacitor CA2, a second capacitor CA3, a third capacitor CA4 and a seventh resistor RA10; the V-phase voltage output circuit 30 also includes: a fourth capacitor CB2, a fifth capacitor CB3, a sixth capacitor CB4 and an eighth resistor RB10; the W-phase voltage output circuit 40 also includes: a seventh capacitor CC2, an eighth capacitor CC3, a ninth capacitor CC4 and a ninth resistor RC10; wherein one end of the first capacitor CA2 is connected to the emitter of the first transistor PA1, and the other end of the first capacitor CA2 is connected to the collector of the second transistor PA2; the One end of the second capacitor CA3 is connected to the gate of the first MOS transistor V1, and the other end of the second capacitor CA3 is connected to the drain of the first MOS transistor V1; one end of the third capacitor CA4 is connected to the gate of the second MOS transistor V2, and the other end of the third capacitor CA4 is connected to the drain of the second MOS transistor V2; one end of the seventh resistor RA10 is connected to the other end of the first capacitor CA2, and the other end of the seventh resistor RA10 is connected to the drain of the second MOS transistor V2; one end of the first capacitor CB2 is connected to the emitter of the first transistor PB1, and the other end of the first capacitor CB2 is connected to the emitter of the first transistor PB1. One end of the second capacitor CB3 is connected to the gate of the first MOS transistor V3, and the other end of the second capacitor CB3 is connected to the drain of the first MOS transistor V3; one end of the third capacitor CB4 is connected to the gate of the second MOS transistor V4, and the other end of the third capacitor CB4 is connected to the drain of the second MOS transistor V4; one end of the seventh resistor RB10 is connected to the other end of the first capacitor CB2, and the other end of the seventh resistor RB10 is connected to the drain of the second MOS transistor V4; one end of the first capacitor CC2 is connected to the first transistor P The emitter of the first MOS transistor V6 is connected to the emitter of the first capacitor CC1, the other end of the first capacitor CC2 is connected to the collector of the second transistor PC2; one end of the second capacitor CC3 is connected to the gate of the first MOS transistor V5, and the other end of the second capacitor CC3 is connected to the drain of the first MOS transistor V5; one end of the third capacitor CC4 is connected to the gate of the second MOS transistor V6, and the other end of the third capacitor CC4 is connected to the drain of the second MOS transistor V6; one end of the seventh resistor RC10 is connected to the other end of the first capacitor CC2, and the other end of the seventh resistor RC10 is connected to the drain of the second MOS transistor V6.

[0121] In one embodiment, Figure 5As shown, the emergency stop circuit 50 includes: a tenth resistor R20, an eleventh resistor R22, a twelfth resistor R23, a thirteenth resistor R45, a fourteenth resistor R46, an eighteenth transistor Q2, a seventh diode D1 and a tenth capacitor C12; wherein one end of the tenth resistor R20 is connected to an external power supply, and the other end of the tenth resistor R20 is connected to the anode of the seventh diode D1, one end of the twelfth resistor R23, one end of the eleventh resistor R22 and one end of the tenth capacitor C12; the other end of the twelfth resistor R23 is connected to the The input end of the main control circuit 10 is connected; the other end of the eleventh resistor R22 is connected to the collector of the eighteenth transistor Q2; the other end of the tenth capacitor C12 is grounded; the cathode of the seventh diode D1 is connected to the button; the emitter of the eighteenth transistor Q2 is grounded, and the base of the eighteenth transistor Q2 is connected to one end of the fourteenth resistor R46; the other end of the fourteenth resistor R46 is connected to the button; one end of the thirteenth resistor R45 is connected to the base of the eighteenth transistor Q2, and the other end of the thirteenth resistor R45 is grounded.

[0122] In one embodiment, Figure 6 As shown, the detection circuit 60 includes: a fourteenth resistor R57, a fifteenth resistor R56, a sixteenth resistor R58, a seventeenth resistor R53, an eighteenth resistor R52 and a nineteenth resistor R54; wherein one end of the seventeenth resistor R53 is connected to the output end of the U-phase voltage output circuit 20, and the other end of the seventeenth resistor R53 is connected to the input end of the main control circuit 10; one end of the eighteenth resistor R52 is connected to the output end of the V-phase voltage output circuit 30, and the other end of the eighteenth resistor R52 is connected to the input end of the main control circuit 10; the nineteenth resistor R54 One end is connected to the output end of the W-phase voltage output circuit 40, and the other end of the nineteenth resistor R54 is connected to the input end of the main control circuit 10; one end of the fourteenth resistor R57 is connected to one end of the nineteenth resistor R54, and the other end of the fourteenth resistor R57 is connected to an external power supply; one end of the fifteenth resistor R56 is connected to one end of the eighteenth resistor R52, and the other end of the fifteenth resistor R56 is connected to an external power supply; one end of the sixteenth resistor R58 is connected to one end of the seventeenth resistor R53, and the other end of the sixteenth resistor R58 is connected to an external power supply.

[0123] In one embodiment, Figure 6As shown, the detection circuit 60 also includes: an eleventh capacitor C16, a twelfth capacitor C17 and a thirteenth capacitor C18; wherein, one end of the eleventh capacitor C16 is connected to the other end of the seventeenth resistor R53, and the other end of the eleventh capacitor C16 is grounded; one end of the twelfth capacitor C17 is connected to the other end of the eighteenth resistor R52, and the other end of the twelfth capacitor C17 is grounded; one end of the thirteenth capacitor C18 is connected to the other end of the nineteenth resistor R54, and the other end of the thirteenth capacitor C18 is grounded.

[0124] In one embodiment, Figure 7 As shown, the input protection circuit 70 includes: a twentieth resistor R13, a twenty-first resistor R14 and a fourteenth capacitor C5; wherein, one end of the twentieth resistor R13 is connected to the input end of the main control circuit 10, and the other end of the twentieth resistor R13 is connected to the input signal; one end of the twenty-first resistor R14 is connected to the other end of the twentieth resistor R13, and the other end of the twenty-first resistor R14 is grounded; the fourteenth capacitor C5 is connected in parallel with the twenty-first resistor R14.

[0125] The motor driven by the motor driving circuit in the present application may be a motor driving a propeller on an electric surfboard or a small fishing boat, such as Figure 8 As shown, in Figure 8 In the invention, two motor drive circuits are arranged, namely ECU-M1 and ECU-M2. The first motor drive circuit ECU-M1 controls the first motor MOTOR1, and the second motor drive circuit ECU-M2 controls the second motor MOTOR2. The first motor drive circuit ECU-M1 and the second motor drive circuit ECU-M2 are both connected to a wireless control module ECU-R. The wireless control module ECU-R is connected to a handheld wireless remote control handle for communication. When the handheld wireless remote control handle controls the pressing of a button, a control signal is output to the wireless control module ECU-R. The wireless control module ECU-R outputs the control signal to the second There is a motor drive circuit ECU-M1 and a second motor drive circuit ECU-M2. At this time, the first motor drive circuit ECU-M1 and the second motor drive circuit ECU-M2 control the actions of the first motor MOTOR1 and the second motor MOTOR2 respectively; the main control chip in the motor drive circuit, that is, the operation logic of the single-chip microcomputer is to soft-start the motor within 8 seconds, so that the surfboard or the hull will not have a sense of frustration when stopping or starting suddenly. The motor drives the underwater propeller to propel the surfboard. The entire controller has a waterproof design and can be immersed in fresh water and sea water. It also adopts a wide voltage design and can be used in the 24v-60v power supply range. At the same time, a power display module is also provided to display the reputation power of the power supply that powers the motor drive circuit.

[0126] The present application divides the input signal connected by the input protection circuit and outputs it to the main control circuit; the main control circuit receives the divided input signal, and outputs the first voltage and the second voltage to the U-phase voltage output circuit, outputs the third voltage and the fourth voltage to the V-phase voltage output circuit, and outputs the fifth voltage and the sixth voltage to the W-phase voltage output circuit; the U-phase voltage output circuit receives the first voltage and the second voltage, and outputs the U-phase voltage to the motor; the V-phase voltage output circuit receives the third voltage and the fourth voltage, and outputs the V-phase voltage to the motor; the W-phase voltage output circuit receives the fifth voltage and the sixth voltage, and outputs the W-phase voltage to the motor; the detection circuit obtains the U-phase voltage output by the U-phase voltage output circuit, the V-phase voltage output by the V-phase voltage output circuit, and the W-phase voltage output by the W-phase voltage output circuit, and outputs the U-phase voltage, the V-phase voltage, and the W-phase voltage to the main control circuit. The present application divides the input signal given to the main control circuit through the input protection circuit, which effectively avoids the voltage value of the input signal being too large and burning out the main control circuit; at the same time, the detection circuit can obtain the U-phase voltage output by the U-phase voltage output circuit, the V-phase voltage output by the V-phase voltage output circuit, and the W-phase voltage output by the W-phase voltage output circuit in real time, effectively improving the utilization efficiency of the drive circuit.

[0127] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A motor drive circuit, characterized in that: include: An input protection circuit, the input end of which is used to receive an input signal, and the output end of which is connected to the input end of the main control circuit, and is used to divide the input signal and then output it to the main control circuit; The main control circuit, the output end of which is connected to the input end of the U-phase voltage output circuit, the input end of the V-phase voltage output circuit and the input end of the W-phase voltage output circuit, is used to receive the divided input signal, and output the first voltage and the second voltage to the U-phase voltage output circuit, output the third voltage and the fourth voltage to the V-phase voltage output circuit, and output the fifth voltage and the sixth voltage to the W-phase voltage output circuit; The U-phase voltage output circuit has an output end connected to the U-phase of the motor, is used to receive the first voltage and the second voltage, and output the U-phase voltage to the motor; The V-phase voltage output circuit, whose output end is connected to the V-phase of the motor, is used to receive the third voltage and the fourth voltage, and output the V-phase voltage to the motor; The W-phase voltage output circuit, whose output end is connected to the W-phase of the motor, is used to receive the fifth voltage and the sixth voltage, and output the W-phase voltage to the motor; A detection circuit, whose input end is connected to the output end of the U-phase voltage output circuit, the output end of the V-phase voltage output circuit and the output end of the W-phase voltage output circuit, and whose output end is connected to the input end of the main control circuit, is used to obtain the U-phase voltage output by the U-phase voltage output circuit, the V-phase voltage output by the V-phase voltage output circuit and the W-phase voltage output by the W-phase voltage output circuit, and output the U-phase voltage, the V-phase voltage and the W-phase voltage to the main control circuit.

2. The motor drive circuit according to claim 1, characterized in that: Also includes: An emergency stop circuit, whose output end is connected to the input end of the main control circuit, is used to output a control signal to the main control circuit. The main control circuit is also used to receive the control signal and stop outputting the first voltage and the second voltage to the U-phase voltage output circuit, stop outputting the third voltage and the fourth voltage to the V-phase voltage output circuit, and stop outputting the fifth voltage and the sixth voltage to the W-phase voltage output circuit.

3. The motor drive circuit according to claim 1, characterized in that: The main control circuit comprises: a main control chip; The first output terminal and the second output terminal of the main control chip are connected to the input terminal of the U-phase voltage output circuit; The third output terminal and the fourth output terminal of the main control chip are connected to the input terminal of the V-phase voltage output circuit; The fifth output terminal and the sixth output terminal of the main control chip are connected to the input terminal of the W-phase voltage output circuit; The first input terminal of the main control chip is connected to the output terminal of the input protection circuit.

4. The motor drive circuit according to claim 3, characterized in that: The U-phase voltage output circuit comprises: a first triode, a second triode, a third triode, a fourth triode, a fifth triode, a sixth triode, a first MOS tube and a second MOS tube; The V-phase voltage output circuit includes: a seventh triode, an eighth triode, a ninth triode, a tenth triode, an eleventh triode, a twelfth triode, a third MOS tube and a fourth MOS tube; The W-phase voltage output circuit includes: a thirteenth transistor, a fourteenth transistor, a fifteenth transistor, a sixteenth transistor, a seventeenth transistor, an eighteenth transistor, a fifth MOS transistor and a sixth MOS transistor; The base of the fourth transistor is connected to the second output terminal of the main control chip, the collector of the fourth transistor is connected to the base of the first transistor, and the emitter of the fourth transistor is grounded; The emitter of the first transistor is connected to an external power supply, and the collector of the first transistor is connected to the base of the second transistor; The emitter of the second triode is connected to the gate of the first MOS tube, and the collector of the second triode is connected to the gate of the first MOS tube and the motor; The source of the first MOS tube is connected to the external power supply, and the drain of the first MOS tube and the source of the second MOS tube are connected to the motor; The base of the fifth transistor is connected to the external power supply, the collector of the fifth transistor is connected to the base of the third transistor and the external power supply, and the emitter of the fifth transistor is connected to the base of the sixth transistor and the first output end of the main control chip; The collector of the third transistor is connected to the collector of the sixth transistor and the gate of the second MOS transistor, and the emitter of the third transistor is connected to an external power supply; The emitter of the sixth triode is grounded; The source of the second MOS tube is connected to the motor, and the drain of the second MOS tube is grounded; The base of the thirteenth transistor is connected to the fourth output terminal of the main control chip, the collector of the thirteenth transistor is connected to the base of the seventh transistor, and the emitter of the thirteenth transistor is grounded; The emitter of the seventh transistor is connected to an external power supply, and the collector of the seventh transistor is connected to the base of the eighth transistor; The emitter of the eighth transistor is connected to the gate of the third MOS transistor, and the collector of the eighth transistor is connected to the gate of the third MOS transistor and the motor; The source of the third MOS tube is connected to the external power supply, and the drain of the third MOS tube and the source of the fourth MOS tube are connected to the motor; The base of the eleventh transistor is connected to the external power supply, the collector of the eleventh transistor is connected to the base of the ninth transistor and the external power supply, and the emitter of the eleventh transistor is connected to the base of the twelfth transistor and the third output terminal of the main control chip; The collector of the ninth transistor is connected to the collector of the twelfth transistor and the gate of the fourth MOS transistor, and the emitter of the ninth transistor is connected to an external power supply; The emitter of the twelfth transistor is grounded; The source of the fourth MOS tube is connected to the motor, and the drain of the fourth MOS tube is grounded; The base of the thirteenth transistor is connected to the sixth output terminal of the main control chip, the collector of the thirteenth transistor is connected to the base of the seventh transistor, and the emitter of the thirteenth transistor is grounded.

5. The motor drive circuit according to claim 4, characterized in that: The U-phase voltage output circuit further includes: a first diode, a second diode, a first resistor and a second resistor; The V-phase voltage output circuit further includes: a third diode, a fourth diode, a third resistor and a fourth resistor; The W-phase voltage output circuit further includes: a fifth diode, a sixth diode, a fifth resistor and a sixth resistor; The anode of the first diode is connected to the external power supply, and the cathode of the first diode is connected to the collector of the fourth transistor; The anode of the second diode is connected to the base of the second transistor, the cathode of the second diode is connected to one end of the first resistor, and the other end of the first resistor is connected to the emitter of the second transistor; One end of the second resistor is connected to the anode of the second diode, and the other end of the second resistor is connected to the collector of the second transistor.

6. The motor drive circuit according to claim 5, characterized in that: The U-phase voltage output circuit further includes: a first capacitor, a second capacitor, a third capacitor and a seventh resistor; The V-phase voltage output circuit further includes: a fourth capacitor, a fifth capacitor, a sixth capacitor and an eighth resistor; The W-phase voltage output circuit further includes: a seventh capacitor, an eighth capacitor, a ninth capacitor and a ninth resistor; One end of the first capacitor is connected to the emitter of the first transistor, and the other end of the first capacitor is connected to the collector of the second transistor; One end of the second capacitor is connected to the gate of the first MOS transistor, and the other end of the second capacitor is connected to the drain of the first MOS transistor; One end of the third capacitor is connected to the gate of the second MOS transistor, and the other end of the third capacitor is connected to the drain of the second MOS transistor; One end of the seventh resistor is connected to the other end of the first capacitor, and the other end of the seventh resistor is connected to the drain of the second MOS tube.

7. The motor drive circuit according to claim 2, characterized in that: The emergency stop circuit comprises: a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, an eighteenth transistor, a seventh diode and a tenth capacitor; One end of the tenth resistor is connected to an external power supply, and the other end of the tenth resistor is connected to the anode of the seventh diode, one end of the twelfth resistor, one end of the eleventh resistor and one end of the tenth capacitor; The other end of the twelfth resistor is connected to the input end of the main control circuit; The other end of the eleventh resistor is connected to the collector of the eighteenth transistor; The other end of the tenth capacitor is grounded; The cathode of the seventh diode is connected to the button; The emitter of the eighteenth transistor is grounded, and the base of the eighteenth transistor is connected to one end of the fourteenth resistor; The other end of the fourteenth resistor is connected to the button; One end of the thirteenth resistor is connected to the base of the eighteenth transistor, and the other end of the thirteenth resistor is grounded.

8. The motor drive circuit according to claim 1, characterized in that: The detection circuit includes: a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor and a nineteenth resistor; One end of the seventeenth resistor is connected to the output end of the U-phase voltage output circuit, and the other end of the seventeenth resistor is connected to the input end of the main control circuit; One end of the eighteenth resistor is connected to the output end of the V-phase voltage output circuit, and the other end of the eighteenth resistor is connected to the input end of the main control circuit; One end of the nineteenth resistor is connected to the output end of the W-phase voltage output circuit, and the other end of the nineteenth resistor is connected to the input end of the main control circuit; One end of the fourteenth resistor is connected to one end of the nineteenth resistor, and the other end of the fourteenth resistor is connected to an external power supply; One end of the fifteenth resistor is connected to one end of the eighteenth resistor, and the other end of the fifteenth resistor is connected to an external power supply; One end of the sixteenth resistor is connected to one end of the seventeenth resistor, and the other end of the sixteenth resistor is connected to an external power supply.

9. The motor drive circuit according to claim 8, characterized in that: The detection circuit further includes: an eleventh capacitor, a twelfth capacitor and a thirteenth capacitor; One end of the eleventh capacitor is connected to the other end of the seventeenth resistor, and the other end of the eleventh capacitor is grounded; One end of the twelfth capacitor is connected to the other end of the eighteenth resistor, and the other end of the twelfth capacitor is grounded; One end of the thirteenth capacitor is connected to the other end of the nineteenth resistor, and the other end of the thirteenth capacitor is grounded.

10. The motor drive circuit according to claim 1, characterized in that: The input protection circuit comprises: a twentieth resistor, a twenty-first resistor and a fourteenth capacitor; One end of the 20th resistor is connected to the input end of the main control circuit, and the other end of the 20th resistor is connected to the input signal; One end of the twenty-first resistor is connected to the other end of the twenty-first resistor, and the other end of the twenty-first resistor is grounded; The fourteenth capacitor is connected in parallel with the twenty-first resistor.

Images