CN212909389U - Direct current motor H-bridge driving circuit with double threshold functions - Google Patents
Direct current motor H-bridge driving circuit with double threshold functions Download PDFInfo
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- CN212909389U CN212909389U CN202021460716.7U CN202021460716U CN212909389U CN 212909389 U CN212909389 U CN 212909389U CN 202021460716 U CN202021460716 U CN 202021460716U CN 212909389 U CN212909389 U CN 212909389U
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Abstract
The utility model discloses a direct current motor H bridge drive circuit with double-threshold function, including corotation drive module and the reversal drive module of receiving the reversal instruction of receiving the corotation instruction, still include corotation instruction processing module and reversal instruction processing module, corotation instruction processing module's input corotation instruction, corotation instruction processing module's corotation output is connected with corotation drive module's input, reversal instruction processing module's input reversal instruction, reversal instruction processing module's reversal output is connected with reversal drive module's input. The utility model discloses an adopt corotation instruction processing module and reversal instruction processing module to handle corotation instruction and reversal instruction, realize two threshold switch control functions, can guarantee corotation instruction and the stability of reversal instruction control, avoided frequently opening the circuit damage problem that causes because of the fluctuation of command voltage leads to direct current motor to open and stop.
Description
Technical Field
The utility model relates to a DC motor's drive circuit especially relates to a DC motor H bridge drive circuit with two threshold functions.
Background
The existing direct current motor drive usually adopts an H-bridge drive circuit, that is, an H-bridge circuit structure is formed by four MOS transistors or power transistors (see S1-S4 in fig. 1) and a direct current motor (see M in fig. 1), the forward rotation or the reverse rotation of the motor is controlled through two mutually exclusive control instructions, and the forward rotation drive module, the reverse rotation drive module, the direct current motor and the four MOS transistors or power transistors jointly form an H-bridge circuit module.
In a traditional H-bridge driving circuit of a direct current motor, the command only has one threshold, namely the command is valid when the command voltage is higher than the threshold, and the command is invalid when the command voltage is lower than the threshold. When the command voltage is unstable, especially when the voltage fluctuates near the threshold voltage, the output of the whole H-bridge circuit will fluctuate, which causes frequent start and stop of the motor and damages the motor in severe cases.
In addition, four MOS transistors or power triodes of the H-bridge circuit cannot be simultaneously conducted, otherwise, the circuit is burned out due to short circuit, so that two control instructions must be mutually exclusive, that is, only one control instruction can act at the same time. Traditional direct current motor H bridge drive circuit, direct corotation instruction and reversal instruction input corotation drive module and reversal drive module respectively with the control command of two mutexes promptly, do not carry out interlocking processing to corotation instruction and reversal instruction in the circuit, direct current motor's operational safety provides the guarantee by control command's accuracy, in case control command takes place the mistake, will lead to the circuit to damage, make direct current motor operation break down, consequently the security is not enough.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a direct current motor H bridge drive circuit with two threshold functions just in order to solve above-mentioned problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a direct current motor H bridge drive circuit with a double-threshold function comprises a forward rotation drive module for receiving a forward rotation instruction, a reverse rotation drive module for receiving a reverse rotation instruction, a forward rotation instruction processing module and a reverse rotation instruction processing module, wherein the forward rotation instruction is input into the input end of the forward rotation instruction processing module, the forward rotation output end of the forward rotation instruction processing module is connected with the input end of the forward rotation drive module, the reverse rotation instruction is input into the input end of the reverse rotation instruction processing module, and the reverse rotation output end of the reverse rotation instruction processing module is connected with the input end of the reverse rotation drive module; the forward rotation instruction processing module comprises an eleventh diode, an eighteenth voltage stabilizing diode, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a seventh PNP triode, a ninth NPN triode, a tenth NPN triode and an eleventh NPN triode, the inversion instruction processing module comprises a fifteenth diode, a thirteenth voltage stabilizing diode, a forty-sixth resistor, a forty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirty-eleventh resistor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-seventh resistor, a fourteenth PNP triode, a twelfth NPN triode, a thirteenth NPN triode and a sixteenth NPN triode; the positive electrode of the eleventh diode is the input end of the forward rotation instruction processing module, the negative electrode of the eleventh diode is connected to the first end of the twenty-fourth resistor, the second end of the twenty-fourth resistor is connected to the base electrode of the ninth NPN triode, the collector electrode of the ninth NPN triode is connected to the first end of the sixteenth resistor and the first end of the nineteenth resistor, the second end of the sixteenth resistor is connected to the negative electrode of the eighteenth zener diode, the first end of the fifteenth resistor and the first end of the seventeenth resistor, the emitter electrode of the ninth NPN triode is connected to the emitter electrode of the tenth NPN triode and the first end of the twenty-fifth resistor, the base electrode of the tenth NPN triode is connected to the second end of the nineteenth resistor, and the collector electrode of the tenth NPN triode is connected to the second end of the seventeenth resistor and the first end of the twentieth resistor, a second end of the twentieth resistor is connected to a base of the seventh PNP triode, an emitter of the seventh PNP triode, a second end of the fifteenth resistor, a first end of the eighteenth resistor, a first end of the twenty-eighth resistor, a first end of the twenty-ninth resistor, and an emitter of the fourteenth PNP triode are all connected to a positive electrode of a power supply, a collector of the seventh PNP triode is connected to a first end of the twenty-sixth resistor, a second end of the twenty-sixth resistor is connected to a first end of the twenty-seventh resistor and a base of the eleventh NPN triode, a collector of the eleventh NPN triode is connected to a second end of the eighteenth resistor and a first end of the twenty-first resistor, respectively, and a second end of the twenty-first resistor serves as a forward rotation output end of the forward rotation instruction processing module; the positive electrode of the fifteenth diode is the input end of the inversion instruction processing module, the negative electrode of the fifteenth diode is connected with the first end of the thirty-first resistor, the second end of the thirty-first resistor is connected with the base electrode of the twelfth NPN triode, the collector electrode of the twelfth NPN triode is connected with the first end of the forty-sixth resistor and the first end of the thirty-second resistor, the second end of the forty-sixth resistor is connected with the negative electrode of the thirteenth voltage stabilizing diode, the first end of the twenty-eighth resistor and the first end of the forty-seventh resistor, the emitter electrode of the twelfth NPN triode is connected with the emitter electrode of the thirteenth NPN triode and the first end of the thirty-fifth resistor, the base electrode of the thirteenth NPN triode is connected with the second end of the thirty-second resistor, and the collector electrode of the thirteenth NPN triode is connected with the second end of the forty-seventh resistor and the third end of the thirty-fifth resistor respectively A first end of a thirteenth resistor is connected, a second end of the thirty-third resistor is connected with a base of the fourteenth PNP triode, a collector of the fourteenth PNP triode is connected with a first end of the thirty-fourth resistor, a second end of the thirty-fourth resistor is connected with a first end of a thirty-sixth resistor and a base of the sixteenth NPN triode respectively, a collector of the sixteenth NPN triode is connected with a second end of the twenty-ninth resistor and a first end of the thirty-seventh resistor respectively, and a second end of the thirty-seventh resistor is used as an inversion output end of the inversion instruction processing module; the anode of the eighteenth voltage-stabilizing diode, the second end of the twenty-fifth resistor, the second end of the twenty-seventh resistor, the emitter of the eleventh NPN triode, the anode of the thirteenth voltage-stabilizing diode, the second end of the thirty-fifth resistor, the second end of the thirty-sixth resistor, and the emitter of the sixteenth NPN triode are all connected to the cathode of the power supply.
Further, an eleventh resistor and a second capacitor are connected in parallel between the negative electrode of the eleventh diode and the negative electrode of the power supply; and a thirtieth resistor and a fourth capacitor are connected in parallel between the cathode of the fifteenth diode and the cathode of the power supply.
Further, in order to realize the instruction interlocking function, the direct current motor H bridge drive circuit with the double-threshold function further comprises an instruction interlocking module, wherein the forward rotation output end of the forward rotation instruction processing module is connected with the forward rotation input end of the instruction interlocking module, the forward rotation drive output end of the instruction interlocking module is connected with the input end of the forward rotation drive module, the reverse rotation output end of the reverse rotation instruction processing module is connected with the reverse rotation input end of the instruction interlocking module, and the reverse rotation drive output end of the instruction interlocking module is connected with the input end of the reverse rotation drive module; the command interlocking module comprises a twenty-second resistor, a twenty-third resistor, a thirty-eighth resistor, a thirty-ninth resistor, a ninth diode, a twelfth diode, a fourteenth diode, a sixteenth diode, a seventeenth diode, an eighth NPN triode and a fifteenth NPN triode, wherein a first end of the twenty-second resistor is connected with the anode of the twelfth diode and serves as a forward rotation input end of the command interlocking module, a second end of the twenty-second resistor is connected with the anode of the ninth diode, the cathode of the ninth diode is respectively connected with the base of the eighth NPN triode and the first end of the twenty-third resistor, the collector of the eighth NPN triode is connected with the cathode of the twelfth diode, the cathode of the twelfth diode is connected with the anode of the fourteenth diode and serves as a forward rotation driving output end of the command interlocking module, a first end of the thirty-eighth resistor is connected with an anode of the seventeenth diode and serves as a reverse input end of the command interlock module, a second end of the thirty-eighth resistor is connected with an anode of the sixteenth diode, a cathode of the sixteenth diode is respectively connected with a base of the fifteenth NPN triode and a first end of the thirty-ninth resistor, a collector of the fifteenth NPN triode is connected with a cathode of the fourteenth diode, a cathode of the seventeenth diode is connected with an anode of the twelfth diode and serves as a reverse driving output end of the command interlock module, and a second end of the twenty-third resistor, an emitter of the eighth NPN triode, a second end of the thirty-ninth resistor and an emitter of the fifteenth NPN triode are all connected with a cathode of a power supply.
Further, a first capacitor is connected between the first end of the twenty-second resistor and the second end of the twenty-third resistor, and a third capacitor is connected between the first end of the thirty-eighth resistor and the second end of the thirty-ninth resistor.
The beneficial effects of the utility model reside in that:
the utility model discloses an adopt corotation instruction processing module and reversal instruction processing module that are made up into by four triodes respectively to handle corotation instruction and reversal instruction, realize two threshold switch control functions, when corotation instruction or reversal instruction's voltage is greater than high level threshold voltage, the instruction becomes effective from invalid, when corotation instruction or reversal instruction's voltage is less than low level threshold voltage, the instruction becomes invalid from effective, can guarantee corotation instruction and reversal instruction control's stability like this, avoided frequently opening the circuit damage problem that causes because of the fluctuation of command voltage to cause direct current motor to open and stop; in addition, by adding the instruction interlocking module and utilizing an interlocking structure between the two NPN triodes, only one forward rotation driving instruction signal and one reverse rotation driving instruction signal which are output to the forward rotation driving module and the reverse rotation driving module at the same time are effective, and when the forward rotation instruction and the reverse rotation instruction are simultaneously given due to misoperation, the instruction interlocking module can force one of the instructions to be ineffective, so that the circuit is prevented from being damaged, and the reliability of the circuit is improved; the forward rotation instruction processing module and the reverse rotation instruction processing module amplify the instruction signals in multiple stages so as to facilitate the instruction interlocking module to work effectively.
Drawings
Fig. 1 is a general block diagram of a dc motor H-bridge driving circuit with a double threshold function according to the present invention;
fig. 2 is a circuit diagram of a forward rotation instruction processing module, a reverse rotation instruction processing module and an instruction interlocking module of the dc motor H-bridge driving circuit with the double-threshold function according to the present invention;
fig. 3 is a circuit diagram of the forward rotation driving module and the reverse rotation driving module of the H-bridge driving circuit of the dc motor having the double-threshold function.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2, the H-bridge driving circuit of a dc motor with dual threshold functions of the present invention comprises a forward driving module for receiving a forward command, a reverse driving module for receiving a reverse command, a forward command processing module, a reverse command processing module, and a command interlocking module, the input end of the forward rotation instruction processing module inputs the forward rotation instruction, the forward rotation output end of the forward rotation instruction processing module is connected with the forward rotation input end of the instruction interlocking module, the forward rotation driving output end of the instruction interlocking module is connected with the input end of the forward rotation driving module, the input end of the reversal instruction processing module inputs the reversal instruction, the reversal output end of the reversal instruction processing module is connected with the reversal input end of the instruction interlocking module, the reverse driving output end of the instruction interlocking module is connected with the input end of the reverse driving module; the forward rotation instruction processing module comprises an eleventh diode D11, an eighteenth zener diode D18, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-fourth resistor R24, a twenty-fifth resistor R24, a twenty-sixth resistor R24, a twenty-seventh resistor R24, a seventh PNP triode Q24, a ninth NPN triode Q24, a tenth NPN Q24, and an eleventh NPN Q24, and the reverse rotation instruction processing module comprises a fifteenth diode D24, a thirteenth zener diode D24, a sixteenth resistor R24, a forty-seventh resistor R24, a twenty-eighth resistor R24, a twenty-ninth resistor R24, a thirty-eleventh resistor R24, a thirty-second resistor R24, a thirty-third zener diode D24, a thirty-third resistor R24, a thirty-fourth resistor R24, a thirty-fifth resistor R24, a fourteenth NPN transistor Q14, a twelfth NPN transistor Q12, a thirteenth NPN transistor Q13, and a sixteenth NPN transistor Q16; an anode of the eleventh diode D11 is an input terminal of the forward rotation command processing module, a cathode of the eleventh diode D11 is connected to a first end of a twenty-fourth resistor R24, a second end of the twenty-fourth resistor R24 is connected to a base of a ninth NPN transistor Q9, a collector of the ninth NPN transistor Q9 is connected to a first end of a sixteenth resistor R16 and a first end of a nineteenth resistor R19, a second end of the sixteenth resistor R16 is connected to a cathode of the eighteenth voltage stabilizing diode D18, a first end of a fifteenth resistor R15 and a first end of a seventeenth resistor R17, an emitter of the ninth NPN transistor Q9 is connected to an emitter of the tenth NPN transistor Q10 and a first end of a twenty-fifth resistor R25, a base of the tenth NPN transistor Q10 is connected to a second end of the nineteenth resistor R19, a collector of the tenth transistor Q10 is connected to a second end of the seventeenth resistor R17 and a twenty-second end of the twenty-second resistor R20, a second end of the twentieth resistor R20 is connected to a base of the seventh PNP triode Q7, an emitter of the seventh PNP triode Q7, a second end of the fifteenth resistor R15, a first end of the eighteenth resistor R18, a first end of the twenty-eighth resistor R28, a first end of the twenty-ninth resistor R29, and an emitter of the fourteenth PNP triode Q14 are all connected to the positive power VCC, a collector of the seventh PNP triode Q7 is connected to a first end of the twenty-sixth resistor R26, a second end of the twenty-sixth resistor R26 is connected to a first end of the twenty-seventh resistor R27 and a base of the eleventh NPN triode Q11, a collector of the eleventh NPN Q11 is connected to a second end of the eighteenth resistor R18 and a first end of the twenty-first resistor R21, and a second end of the twenty-first resistor R21 is used as an output end of the forward rotation instruction processing module; an anode of the fifteenth diode D15 is an input terminal of the inversion command processing module, a cathode of the fifteenth diode D15 is connected to a first end of a thirty-first resistor R31, a second end of the thirty-first resistor R31 is connected to a base of a twelfth NPN transistor Q12, a collector of the twelfth NPN transistor Q12 is connected to a first end of a forty-sixth resistor R46 and a first end of a thirty-second resistor R32, respectively, a second end of the forty-sixth resistor R46 is connected to a cathode of a thirteenth zener diode D13, a first end of a twenty-eighth resistor R28 and a first end of a forty-seventh resistor R47, respectively, an emitter of the twelfth NPN transistor Q12 is connected to an emitter of the thirteenth NPN transistor Q13 and a first end of a thirty-fifth resistor R35, a base of the thirteenth NPN transistor Q13 is connected to a second end of a thirty-second resistor R32, and a collector of the thirteenth NPN transistor Q13 is connected to a thirty-seventh terminal of a thirty-seventh resistor R47 and a thirty-second end of a thirty-fourth resistor R33, a second end of the thirty-third resistor R33 is connected to a base of the fourteenth PNP transistor Q14, a collector of the fourteenth PNP transistor Q14 is connected to a first end of the thirty-fourth resistor R34, a second end of the thirty-fourth resistor R34 is connected to a first end of the thirty-sixth resistor R36 and a base of the sixteenth NPN transistor Q16, a collector of the sixteenth NPN transistor Q16 is connected to a second end of the twenty-ninth resistor R29 and a first end of the thirty-seventh resistor R37, and a second end of the thirty-seventh resistor R37 is used as an inverting output terminal of the inverting instruction processing module; the anode of the eighteenth voltage-stabilizing diode D18, the second end of the twenty-fifth resistor R25, the second end of the twenty-seventh resistor R27, the emitter of the eleventh NPN transistor Q11, the anode of the thirteenth voltage-stabilizing diode D13, the second end of the thirty-fifth resistor R35, the second end of the thirty-sixth resistor R36, and the emitter of the sixteenth NPN transistor Q16 are all connected to the negative GND of the power supply.
The forward rotation instruction processing module and the reverse rotation instruction processing module which are respectively formed by combining four triodes are adopted to process the forward rotation instruction and the reverse rotation instruction, the double-threshold switch control function is realized, when the voltage of the forward rotation instruction or the reverse rotation instruction is greater than the high-level threshold voltage, the instruction is changed from invalid to effective, when the voltage of the forward rotation instruction or the reverse rotation instruction is less than the low-level threshold voltage, the instruction is changed from effective to invalid, the stability of the control of the forward rotation instruction and the reverse rotation instruction can be ensured, and the problem of circuit damage caused by frequent starting and stopping of the direct current motor M due to fluctuation of the instruction voltage is avoided.
As shown in fig. 2, taking the forward instruction processing module as an example, the dual-threshold switch control principle is as follows:
when the dual-threshold switch is in an off state, the ninth NPN triode Q9 is turned off, the tenth NPN triode Q10, the seventh PNP triode Q7, and the eleventh NPN triode Q11 are all turned on, and the positive rotation output is 0.7V; when the tenth NPN transistor Q10 is turned on, the voltage at the first end of the twenty-fifth resistor R25 is marked as U25(high) ═ VCC-0.7R25/(R17+R25) Herein R is25And R17Respectively representing the resistances of a twenty-fifth resistor R25 and a seventeenth resistor R17, wherein the forward rotation command voltage needs to be increased when the dual-threshold switch is turned to a closed state, and when the forward rotation command voltage is increased>U25(high) +0.7, the ninth NPN triode Q9 turns on, and at this time the tenth NPN triode Q10 turns off, so that the seventh PNP triode Q7 and the eleventh NPN triode Q11 both turn off, the dual-threshold switch becomes a closed state, and the positive rotation output is the power supply voltage VCC;
when the dual-threshold switch is in a closed state, the ninth NPN transistor Q9 is turned on, and at this time, U is turned on25(Low) ═ VCC-0.7R25/(R16+R25) Herein R is25And R16Respectively representing the resistances of a twenty-fifth resistor R25 and a sixteenth resistor R16, and reducing the forward rotation command voltage when the dual-threshold switch is turned off<U25And when the sum of the positive voltage and the negative voltage is 0.7, the ninth NPN triode Q9 is cut off, and the eleventh NPN triode Q10 is turned on, so that the seventh PNP triode Q7 and the eleventh NPN triode Q11 are both turned on, the dual-threshold switch is turned off, and the positive rotation output is 0.7V.
The parameters of R16, R17, R25 are set such thatU25(high)>U25(low). Setting U as high threshold level25(high) +0.7, low threshold level ═ U25(low) +0.7, then a double threshold switch can be implemented.
By analogy, the double-threshold switch control of the reversal instruction processing module can be realized.
The utility model also discloses more specific optimization circuit below:
as shown in fig. 2, an eleventh resistor R11 and a second capacitor C2 are connected in parallel between the cathode of the eleventh diode D11 and the power supply cathode GND; a thirtieth resistor R30 and a fourth capacitor C4 are connected in parallel between the cathode of the fifteenth diode D15 and the power supply cathode GND.
As shown in fig. 1 and fig. 2, the H-bridge driving circuit of the dc motor with the double-threshold function further includes an instruction interlock module, a forward rotation output end of the forward rotation instruction processing module is connected to a forward rotation input end of the instruction interlock module, a forward rotation driving output end of the instruction interlock module is connected to an input end of the forward rotation driving module, a reverse rotation output end of the reverse rotation instruction processing module is connected to a reverse rotation input end of the instruction interlock module, and a reverse rotation driving output end of the instruction interlock module is connected to an input end of the reverse rotation driving module; the command interlock module comprises a twenty-second resistor R22, a twenty-third resistor R23, a thirty-eighth resistor R38, a thirty-ninth resistor R39, a ninth diode D9, a twelfth diode D10, a twelfth diode D12, a fourteenth diode D14, a sixteenth diode D16, a seventeenth diode D17, an eighth NPN triode Q8 and a fifteenth NPN triode Q15, wherein a first end of a twenty-second resistor R22 is connected with an anode of a twelfth diode D12 and serves as a forward rotation input end of the command interlock module, a second end of a twenty-second resistor R22 is connected with an anode of a ninth diode D9, a cathode of a ninth diode D9 is respectively connected with a base of an eighth NPN triode Q8 and a first end of a twenty-third resistor R23, a collector of an eighth NPN triode Q8 is connected with a cathode of a twelfth diode D10, a cathode of a twelfth diode D12 is connected with an anode of a fourteenth diode D14 and serves as a forward rotation output end of the command interlock module, a first end of the thirty-eighth resistor R38 is connected to an anode of the seventeenth diode D17 and serves as an inverting input terminal of the command interlock module, a second end of the thirty-eighth resistor R38 is connected to an anode of the sixteenth diode D16, a cathode of the sixteenth diode D16 is connected to a base of the fifteenth NPN transistor Q15 and a first end of the thirty-ninth resistor R39, respectively, a collector of the fifteenth NPN transistor Q15 is connected to a cathode of the fourteenth diode D14, a cathode of the seventeenth diode D17 is connected to an anode of the twelfth diode D10 and serves as an inverting driving output terminal of the command interlock module, and a second end of the twenty-third resistor R23, an emitter of the eighth NPN transistor Q8, a second end of the thirty-ninth resistor R39, and an emitter of the fifteenth NPN transistor Q15 are all connected to a cathode GND of the power supply.
As shown in fig. 2, during normal operation, the forward rotation input end and the reverse rotation input end of the instruction interlock module only have one signal, and the corresponding forward rotation driving output end and the corresponding reverse rotation driving output end only output one output signal, because the NPN transistor without signal input is turned off, the output signal is not pulled low, so that the corresponding forward rotation driving output signal and the corresponding reverse rotation driving output signal can be normally output; if the corotation instruction and the reverse rotation instruction are given simultaneously due to misoperation, the corotation input end and the reverse rotation input end of the instruction interlocking module both have signals, and the corotation drive output end and the reverse rotation drive output end only have one output signal at the moment, because: after any one of the eighth NPN transistor Q8 and the fifteenth NPN transistor Q15 is turned on, the base voltage and the output signal voltage of the other NPN transistor are inevitably extremely low, so that the NPN transistor is turned off, and the voltage of the output signal corresponding to the turned-on NPN transistor is not pulled down, so that the NPN transistor can normally output a signal.
As shown in fig. 2, a first capacitor C1 is connected between the first end of the twenty-second resistor R22 and the second end of the twenty-third resistor R23, and a third capacitor C3 is connected between the first end of the thirty-eighth resistor R38 and the second end of the thirty-ninth resistor R39.
As shown in fig. 3, the forward driving module includes a first resistor R1, a third resistor R3, a fifth resistor R5, a seventh resistor R7, a ninth resistor R9, a thirteenth resistor R13, a third NPN transistor Q3, a first photocoupler O1, a first P-type fet Q1, a fifth N-type fet Q5, a first zener diode D1, a fifth zener diode D5, a third diode D3, and a sixth diode D3, the reverse driving module includes a second resistor R3, a fourth resistor R3, a sixth resistor R3, an eighth resistor R3, a tenth resistor R3, a fourteenth resistor R3, a fourth NPN transistor Q3, a second photocoupler O3, a second P-type fet Q3, a sixth N-type Q3, a second zener diode D3, an eighth NPN diode D3, a seventh zener diode D3, a ninth resistor R3, and a ninth diode D3, and the forward driving module takes the ninth resistor R3 as an input terminal of the ninth forward driving module, a second end of the ninth resistor R9 is connected to a base of a third NPN triode Q3, a collector of the third NPN triode Q3 is connected to a negative electrode of an input terminal of the first photocoupler O1, a positive electrode of an input terminal of the first photocoupler O1 is connected to a first end of the third resistor R3, a positive electrode of an output terminal of the first photocoupler O1 is connected to a first end of the fifth resistor R5, a second end of the fifth resistor R5 is connected to a first end of the first resistor R1, a positive electrode of the first voltage regulator diode D1 and a gate of the first P-type fet Q1, a negative electrode of an output terminal of the first photocoupler O1 is connected to a first end of the seventh resistor R7, a second end of the seventh resistor R7 is connected to a first end of the thirteenth resistor R13, a negative electrode of the fifth voltage regulator diode D5 and a gate of the sixth N-type fet Q6, and a drain of the first P-type fet Q1 and the fifth NPN Q5, The anode of the third diode D3 and the cathode of the sixth diode D6 are both connected with the first end of the direct current motor M; a first end of the tenth resistor R10 is used as an input end of the inversion driving module, a second end of the tenth resistor R10 is connected to a base of the fourth NPN triode Q4, a collector of the fourth NPN triode Q4 is connected to a negative electrode of an input end of the second photocoupler O2, a positive electrode of an input end of the second photocoupler O2 is connected to a first end of the fourth resistor R4, a positive electrode of an output end of the second photocoupler O2 is connected to a first end of the sixth resistor R6, a second end of the sixth resistor R6 is connected to a first end of the second resistor R2, a positive electrode of the second zener diode D2 and a gate of the second P-type fet Q2, a negative electrode of an output end of the second photocoupler O2 is connected to a first end of the eighth resistor R8, a second end of the eighth resistor R8 is connected to a first end of the fourteenth resistor R6, a negative electrode of the eighth zener diode D8, a negative electrode of the fifth N-type fet 5, and a second end of the second P-type fet 2, The drain electrode of the sixth N-type field effect transistor Q6, the anode of the fourth diode D4 and the cathode of the seventh diode D7 are all connected with the second end of the direct current motor M; a second end of the third resistor R3, a cathode of the first zener diode D1, a second end of the first resistor R1, a source of the first pfet Q1, a cathode of the third diode D3, a cathode of the fourth diode D4, a source of the second pfet Q2, a second end of the second resistor R2, a cathode of the second zener diode D2, and a second end of the fourth resistor R4 are all connected to a positive power supply terminal VCC, an emitter of the third NPN transistor Q3, a positive terminal of the fifth zener diode D5, a second end of the thirteenth resistor R13, a source of the fifth nfet Q5, a positive terminal of the sixth diode D6, a positive terminal of the seventh diode D7, a source of the sixth nfet Q6, a second end of the fourteenth resistor R14, a positive terminal of the eighth zener diode D8, and a cathode of the fourth triode Q4 are all connected to a GND. The gate, drain and source are each represented by G, D, S in the figure.
Description of the drawings: S1-S4 in fig. 1 represent four MOS transistors or power transistors, and in this embodiment, S1-S4 respectively employ a first P-type fet Q1, a fifth N-type fet Q5, a second P-type fet Q2, and a sixth N-type fet Q6.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.
Claims (4)
1. The utility model provides a direct current motor H bridge drive circuit with double-threshold function, is including the corotation drive module who receives corotation instruction and the reversal drive module who receives the reversal instruction, its characterized in that: the system comprises a forward rotation driving module, a forward rotation instruction processing module, a reverse rotation instruction processing module and a control module, wherein the forward rotation instruction is input from the input end of the forward rotation instruction processing module, the forward rotation output end of the forward rotation instruction processing module is connected with the input end of the forward rotation driving module, the reverse rotation instruction is input from the input end of the reverse rotation instruction processing module, and the reverse rotation output end of the reverse rotation instruction processing module is connected with the input end of the reverse rotation driving module; the forward rotation instruction processing module comprises an eleventh diode, an eighteenth voltage stabilizing diode, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a seventh PNP triode, a ninth NPN triode, a tenth NPN triode and an eleventh NPN triode, the inversion instruction processing module comprises a fifteenth diode, a thirteenth voltage stabilizing diode, a forty-sixth resistor, a forty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirty-eleventh resistor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-seventh resistor, a fourteenth PNP triode, a twelfth NPN triode, a thirteenth NPN triode and a sixteenth NPN triode; the positive electrode of the eleventh diode is the input end of the forward rotation instruction processing module, the negative electrode of the eleventh diode is connected to the first end of the twenty-fourth resistor, the second end of the twenty-fourth resistor is connected to the base electrode of the ninth NPN triode, the collector electrode of the ninth NPN triode is connected to the first end of the sixteenth resistor and the first end of the nineteenth resistor, the second end of the sixteenth resistor is connected to the negative electrode of the eighteenth zener diode, the first end of the fifteenth resistor and the first end of the seventeenth resistor, the emitter electrode of the ninth NPN triode is connected to the emitter electrode of the tenth NPN triode and the first end of the twenty-fifth resistor, the base electrode of the tenth NPN triode is connected to the second end of the nineteenth resistor, and the collector electrode of the tenth NPN triode is connected to the second end of the seventeenth resistor and the first end of the twentieth resistor, a second end of the twentieth resistor is connected to a base of the seventh PNP triode, an emitter of the seventh PNP triode, a second end of the fifteenth resistor, a first end of the eighteenth resistor, a first end of the twenty-eighth resistor, a first end of the twenty-ninth resistor, and an emitter of the fourteenth PNP triode are all connected to a positive electrode of a power supply, a collector of the seventh PNP triode is connected to a first end of the twenty-sixth resistor, a second end of the twenty-sixth resistor is connected to a first end of the twenty-seventh resistor and a base of the eleventh NPN triode, a collector of the eleventh NPN triode is connected to a second end of the eighteenth resistor and a first end of the twenty-first resistor, respectively, and a second end of the twenty-first resistor serves as a forward rotation output end of the forward rotation instruction processing module; the positive electrode of the fifteenth diode is the input end of the inversion instruction processing module, the negative electrode of the fifteenth diode is connected with the first end of the thirty-first resistor, the second end of the thirty-first resistor is connected with the base electrode of the twelfth NPN triode, the collector electrode of the twelfth NPN triode is connected with the first end of the forty-sixth resistor and the first end of the thirty-second resistor, the second end of the forty-sixth resistor is connected with the negative electrode of the thirteenth voltage stabilizing diode, the first end of the twenty-eighth resistor and the first end of the forty-seventh resistor, the emitter electrode of the twelfth NPN triode is connected with the emitter electrode of the thirteenth NPN triode and the first end of the thirty-fifth resistor, the base electrode of the thirteenth NPN triode is connected with the second end of the thirty-second resistor, and the collector electrode of the thirteenth NPN triode is connected with the second end of the forty-seventh resistor and the third end of the thirty-fifth resistor respectively A first end of a thirteenth resistor is connected, a second end of the thirty-third resistor is connected with a base of the fourteenth PNP triode, a collector of the fourteenth PNP triode is connected with a first end of the thirty-fourth resistor, a second end of the thirty-fourth resistor is connected with a first end of a thirty-sixth resistor and a base of the sixteenth NPN triode respectively, a collector of the sixteenth NPN triode is connected with a second end of the twenty-ninth resistor and a first end of the thirty-seventh resistor respectively, and a second end of the thirty-seventh resistor is used as an inversion output end of the inversion instruction processing module; the anode of the eighteenth voltage-stabilizing diode, the second end of the twenty-fifth resistor, the second end of the twenty-seventh resistor, the emitter of the eleventh NPN triode, the anode of the thirteenth voltage-stabilizing diode, the second end of the thirty-fifth resistor, the second end of the thirty-sixth resistor, and the emitter of the sixteenth NPN triode are all connected to the cathode of the power supply.
2. The H-bridge drive circuit for a dc motor having a dual threshold function as claimed in claim 1, wherein: an eleventh resistor and a second capacitor are connected in parallel between the negative electrode of the eleventh diode and the negative electrode of the power supply; and a thirtieth resistor and a fourth capacitor are connected in parallel between the cathode of the fifteenth diode and the cathode of the power supply.
3. The H-bridge drive circuit for a direct current motor having a double threshold function according to claim 1 or 2, characterized in that: the direct current motor H-bridge drive circuit with the double-threshold function further comprises an instruction interlocking module, wherein a forward rotation output end of the forward rotation instruction processing module is connected with a forward rotation input end of the instruction interlocking module, a forward rotation drive output end of the instruction interlocking module is connected with an input end of the forward rotation drive module, a reverse rotation output end of the reverse rotation instruction processing module is connected with a reverse rotation input end of the instruction interlocking module, and a reverse rotation drive output end of the instruction interlocking module is connected with an input end of the reverse rotation drive module; the command interlocking module comprises a twenty-second resistor, a twenty-third resistor, a thirty-eighth resistor, a thirty-ninth resistor, a ninth diode, a twelfth diode, a fourteenth diode, a sixteenth diode, a seventeenth diode, an eighth NPN triode and a fifteenth NPN triode, wherein a first end of the twenty-second resistor is connected with the anode of the twelfth diode and serves as a forward rotation input end of the command interlocking module, a second end of the twenty-second resistor is connected with the anode of the ninth diode, the cathode of the ninth diode is respectively connected with the base of the eighth NPN triode and the first end of the twenty-third resistor, the collector of the eighth NPN triode is connected with the cathode of the twelfth diode, the cathode of the twelfth diode is connected with the anode of the fourteenth diode and serves as a forward rotation driving output end of the command interlocking module, a first end of the thirty-eighth resistor is connected with an anode of the seventeenth diode and serves as a reverse input end of the command interlock module, a second end of the thirty-eighth resistor is connected with an anode of the sixteenth diode, a cathode of the sixteenth diode is respectively connected with a base of the fifteenth NPN triode and a first end of the thirty-ninth resistor, a collector of the fifteenth NPN triode is connected with a cathode of the fourteenth diode, a cathode of the seventeenth diode is connected with an anode of the twelfth diode and serves as a reverse driving output end of the command interlock module, and a second end of the twenty-third resistor, an emitter of the eighth NPN triode, a second end of the thirty-ninth resistor and an emitter of the fifteenth NPN triode are all connected with a cathode of a power supply.
4. The H-bridge drive circuit for a dc motor having a dual threshold function according to claim 3, wherein: a first capacitor is connected between the first end of the twenty-second resistor and the second end of the twenty-third resistor, and a third capacitor is connected between the first end of the thirty-eighth resistor and the second end of the thirty-ninth resistor.
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| CN202021460716.7U CN212909389U (en) | 2020-07-22 | 2020-07-22 | Direct current motor H-bridge driving circuit with double threshold functions |
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| CN202021460716.7U CN212909389U (en) | 2020-07-22 | 2020-07-22 | Direct current motor H-bridge driving circuit with double threshold functions |
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