CN218162245U - Motor drive control system and motor - Google Patents
Motor drive control system and motor Download PDFInfo
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- CN218162245U CN218162245U CN202222027471.4U CN202222027471U CN218162245U CN 218162245 U CN218162245 U CN 218162245U CN 202222027471 U CN202222027471 U CN 202222027471U CN 218162245 U CN218162245 U CN 218162245U
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Abstract
The application discloses a motor drive control system and a motor, and relates to the field of motor drive, wherein the motor drive control system comprises a drive circuit with an H-bridge structure, and two control units, wherein each control unit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch tube and a second switch tube; the first input of each control unit is connected to the second input of the other control unit. Two units utilize third resistance and second switch tube to realize the interlocking in this application, to arbitrary the control unit, as its first input high level signal, the control end level of its place side NMOS pipe will be forced drop-down ground connection for this NMOS pipe is in the off-state, can guarantee that only this side PMOS pipe can switch on, thereby has eliminated the short circuit hidden danger that signal interference probably caused among the motor positive and negative rotation drive control process.
Description
Technical Field
The utility model relates to a motor drive field, in particular to motor drive control system and motor.
Background
The main circuit of the traditional motor positive and negative rotation driving control is a driving circuit of an H bridge structure shown in fig. 1, when PM1 and NM2 are conducted in the H bridge structure, a motor rotates in a positive direction, and when PM2 and NM1 are conducted in the H bridge structure, the motor rotates in a reverse direction. The drive signal of MOS pipe takes place signal interference very easily when this kind of circuit is in practical application, in case signal interference leads to the switch tube of H bridge structure both sides will all switch on to the motor short circuit, can damage drive circuit's components and parts and motor, leads to the life of components and parts and motor to reduce, still can produce the incident when serious.
Therefore, how to provide a solution to the above technical problems is a problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the present invention is to provide a motor driving control system and a motor, so as to eliminate the potential safety hazard of signal interference to the motor. The specific scheme is as follows:
the utility model provides a motor drive control system, includes the drive circuit of H bridge structure, motor drive control system still includes two the control unit, every the control unit all includes first resistance, second resistance, third resistance, fourth resistance, first switch tube and second switch tube, wherein:
the first end of the first resistor is used as a first output end, and the second end of the first resistor is connected with the first end of the first switching tube;
the first end of the second resistor is used as a first input end, and the second end of the second resistor is connected with the control end of the first switching tube;
the first end of the second switch tube is used as a second output end, and the control end is connected with the first input end through the third resistor;
a first end of the fourth resistor is used as a second input end, and a second end of the fourth resistor is connected with the second output end;
in the same control unit, the first output end is connected with the control end of a PMOS tube in the drive circuit, and the second output end is connected with the control end of an NMOS tube in the drive circuit on the same side as the PMOS tube;
the first input of each of the control units is connected to the second input of another of the control units.
Preferably, the first switch tube and the second switch tube are both NPN triodes.
Preferably, each control unit further includes a fifth resistor, a first end of the fifth resistor is connected to the first output end, and a second end of the fifth resistor is connected to the source of the PMOS transistor corresponding to the first output end.
Preferably, the driving circuit includes two bridge arms, each of the bridge arms includes one PMOS transistor and one NMOS transistor, a source of the PMOS transistor is connected to the power supply, a drain of the PMOS transistor is connected to a drain of the NMOS transistor and a power supply terminal of the motor, respectively, and a source of the NMOS transistor is grounded.
Preferably, the driving circuit further comprises a current-limiting resistor, and the power supply is connected with each of the bridge arms through the current-limiting resistor.
Preferably, the motor drive control system further includes a controller, and a pair of signal output ends of the controller are respectively connected to the first input end and the second input end of any one of the control units.
Correspondingly, this application still discloses a motor, includes:
a motor drive control system as claimed in any one of the above;
and the motor body is connected with the motor drive control system.
The application discloses motor drive control system, drive circuit including H bridge construction, motor drive control system still includes two the control unit, every the control unit all includes first resistance, second resistance, third resistance, fourth resistance, first switch tube and second switch tube, wherein: the first end of the first resistor is used as a first output end, and the second end of the first resistor is connected with the first end of the first switching tube; the first end of the second resistor is used as a first input end, and the second end of the second resistor is connected with the control end of the first switching tube; the first end of the second switch tube is used as a second output end, and the control end is connected with the first input end through the third resistor; a first end of the fourth resistor is used as a second input end, and a second end of the fourth resistor is connected with the second output end; in the same control unit, the first output end is connected with the control end of a PMOS tube in the drive circuit, and the second output end is connected with the control end of an NMOS tube in the drive circuit on the same side as the PMOS tube; the first input of each of the control units is connected to the second input of another of the control units. Two units utilize third resistance and second switch tube to realize the interlocking in this application, to arbitrary control unit, as its first input high level signal, the control end level of its place side NMOS pipe will be forced drop-down ground connection for this NMOS pipe is in the off-state, can guarantee that only this side PMOS pipe can switch on, thereby has eliminated the short circuit hidden danger that signal interference probably caused among the motor just reversing drive control process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a structural diagram of a driving circuit of an H-bridge structure in the prior art;
fig. 2 is a structural distribution diagram of a motor driving control system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses motor drive control system, including the drive circuit of H bridge structure, motor drive control system still includes two the control unit, and every the control unit all includes first resistance, second resistance, third resistance, fourth resistance, first switch tube and second switch tube, wherein:
the first end of the first resistor is used as a first output end, and the second end of the first resistor is connected with the first end of the first switching tube;
the first end of the second resistor is used as a first input end, and the second end of the second resistor is connected with the control end of the first switching tube;
the first end of the second switching tube is used as a second output end, and the control end is connected with the first input end through a third resistor;
the first end of the fourth resistor is used as a second input end, and the second end of the fourth resistor is connected with a second output end;
in the same control unit, the first output end is connected with the control end of a PMOS tube in the drive circuit, and the second output end is connected with the control end of an NMOS tube in the drive circuit on the same side as the PMOS tube;
the first input of each control unit is connected to the second input of the other control unit.
In some specific embodiments, the driving circuit of the H-bridge structure includes two bridge arms, each of the bridge arms includes a PMOS transistor and an NMOS transistor, a source of the PMOS transistor is connected to the power supply, a drain of the PMOS transistor is respectively connected to a drain of the NMOS transistor and a power supply terminal of the motor, and a source of the NMOS transistor is grounded. Referring to fig. 2, the left side bridge arm includes a first PMOS transistor PM1 and a first NMOS transistor NM1, the right side bridge arm includes a second PMOS transistor PM2 and a second NMOS transistor NM2, a common connection point of the first PMOS transistor PM1 and the first NMOS transistor NM1 is connected to one power supply end of the motor, and a common connection point of the second PMOS transistor PM2 and the second NMOS transistor NM2 is connected to the other power supply end of the motor. When the first PMOS transistor PM1 and the second NMOS transistor NM2 are turned on simultaneously, the motor rotates forward, and when the second PMOS transistor PM2 and the first NMOS transistor NM1 are turned on simultaneously, the motor rotates backward.
Further, on the basis of the drive circuit of the H-bridge structure, the motor drive control system further includes two control units, as shown in fig. 2, where the two control units are respectively a control unit 1 and a control unit 2, for the control unit 1, a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch tube and a second switch tube are respectively R11, R12, R13, R14, Q11 and Q12, a first output end of the control unit 1 is connected to a control end of a first PMOS transistor PM1, and a second output end is connected to a control end of a first NMOS transistor NM1 on the same side as the first PMOS transistor PM 1; for the control unit 2, a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch tube and a second switch tube are respectively R21, R22, R23, R24, Q21 and Q22, a first output end of the control unit 2 is connected with a control end of a second PMOS tube PM2, and a second output end of the control unit 2 is connected with a control end of a second NMOS tube NM2 at the same side as the second PMOS tube PM 2; a first input of the control unit 1 is connected to a second input of the control unit 2 and a second output of the control unit 1 is connected to a second output of the control unit 2.
Furthermore, the motor control driving system further comprises a controller, and a pair of signal output ends of the controller are respectively connected with the first input end and the second input end of any control unit.
It will be appreciated that, in practice, the control unit 1 and the control unit 2 require two input signals from a pair of signal outputs of the controller, in accordance with the description of the motor drive control system described above. The first input of each control unit is adapted to receive an input signal, the first input of control unit 1 and the first input of control unit 2 receive input signal L and input signal R, respectively, and the second input of control unit 1 and the second input of control unit 2 receive input signal R and input signal L, respectively, since the second input of each control unit is connected to the first input of another control unit.
In a conventional control process, an input signal R and an input signal L are transmitted by a controller, and theoretically, the input signal R and the input signal L should be a pair of input signals with opposite logics, so that a motor can rotate in a forward direction or a reverse direction. However, there is a possibility of interference to signals sent by the controller, in the simple driving circuit in fig. 1, if the pair of input signals of the two control units are identical in logic, the motor cannot operate normally, if the pair of input signals are at a low level, the motor cannot start, and if the pair of input signals are at a high level, the motor will be short-circuited to damage the circuit.
Specifically, when the input signal L is at a high level and the input signal R is at a low level, in the control unit 1, the first switching tube Q11 and the second switching tube Q12 are both turned on, so that the first PMOS tube PM1 on the side is turned on, and the first NMOS tube NM1 is forcibly turned off by grounding; in the control unit 2, the first switch Q21 and the second switch Q22 are both turned off, the second PMOS transistor PM2 on the side is turned off, the second NMOS transistor NM2 on the side is controlled to be turned on by the input signal L through the fourth resistor R24, and at this time, a current flows from the power supply VDD through the first PMOS transistor PM1, through the motor, and flows out of the second NMOS transistor NM2 to GND, so that a current loop is realized, and the motor rotates.
It should be noted that, at this time, since the first NMOS transistor NM1 is forced to be grounded and turned off, even if the input signal R is disturbed to be a high level, the first NMOS transistor NM1 is not turned on by the influence of the input signal R through the resistor R14, so that the situation that the PMOS transistor and the NMOS transistor are turned on at the same time does not exist on the bridge arm.
Similarly, when the input signal L is at a low level and the input signal R is at a high level, in the control unit 2, the first switch Q21 and the second switch Q22 are both turned on, so that the second PMOS transistor PM2 on that side is turned on, and the second NMOS transistor NM2 is forcibly turned off by grounding; in the control unit 1, the first switch Q11 and the second switch Q12 are both turned off, the first PMOS transistor PM1 on the side is turned off, the first NMOS transistor NM1 on the side is controlled to be turned on by the input signal R through the fourth resistor R14, and at this time, a current flows from the power supply VDD through the second PMOS transistor PM2, through the motor, and flows out of the first NMOS transistor NM1 to GND, so that a current loop is realized, and the motor rotates.
At this time, because the second NMOS transistor NM2 is forced to be grounded and turned off, even if the input signal L is disturbed to be a high level, the second NMOS transistor NM2 is not turned on by the influence of the input signal L through the R24, so that the situation that the PMOS transistor and the NMOS transistor are turned on at the same time does not exist on the bridge arm.
Therefore, in this embodiment, the third resistor and the second switch tube in each control unit lock the NMOS tube on the same side by themselves, so that the situation that the PMOS tube and the NMOS tube in the bridge arm on the same side are simultaneously turned on is avoided.
Furthermore, the first switch tube and the second switch tube are both NPN triodes.
Furthermore, each control unit further comprises a fifth resistor, a first end of the fifth resistor is connected with the first output end, and a second end of the fifth resistor is connected with the source electrode of the PMOS tube corresponding to the first output end. Specifically, in fig. 2, the fifth resistance of the control unit 1 is R15, and the fifth resistance of the control unit 2 is R25.
Furthermore, the driving circuit also comprises a current-limiting resistor, and the power supply is connected with each bridge arm through the current-limiting resistor. It is understood that a current limiting resistor is connected between the power supply VDD and the upper end of the PMOS transistor of each leg for controlling the current through the motor. The current limiting resistor may be a resistor connected between the power supply VDD and the common point of the two arms, or may be two resistors, as shown by R16 and R26 in fig. 2.
The application discloses motor drive control system, drive circuit including the H bridge structure, motor drive control system still includes two the control unit, every the control unit all includes first resistance, second resistance, third resistance, fourth resistance, first switch tube and second switch tube, wherein: the first end of the first resistor is used as a first output end, and the second end of the first resistor is connected with the first end of the first switching tube; the first end of the second resistor is used as a first input end, and the second end of the second resistor is connected with the control end of the first switching tube; the first end of the second switch tube is used as a second output end, and the control end is connected with the first input end through the third resistor; a first end of the fourth resistor is used as a second input end, and a second end of the fourth resistor is connected with the second output end; in the same control unit, the first output end is connected with the control end of a PMOS tube in the drive circuit, and the second output end is connected with the control end of an NMOS tube in the drive circuit on the same side as the PMOS tube; the first input of each of the control units is connected to the second input of another of the control units. Two units utilize third resistance and second switch tube to realize the interlocking in this application, to arbitrary the control unit, as its first input high level signal, the control end level of its place side NMOS pipe will be forced drop-down ground connection for this NMOS pipe is in the off-state, can guarantee that only this side PMOS pipe can switch on, thereby has eliminated the short circuit hidden danger that signal interference probably caused among the motor positive and negative rotation drive control process.
Correspondingly, this application embodiment still discloses a motor, includes:
a motor drive control system as in any one of the embodiments above;
and the motor body is connected with the motor drive control system.
The specific details of the motor drive control system may refer to the description in the above embodiments, and are not repeated herein.
The motor in this embodiment has the same technical effects as the motor driving control system in the foregoing embodiment, and details are not described here.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a motor drive control system, includes the drive circuit of H bridge structure, its characterized in that, motor drive control system still includes two control unit, every the control unit all includes first resistance, second resistance, third resistance, fourth resistance, first switch tube and second switch tube, wherein:
the first end of the first resistor is used as a first output end, and the second end of the first resistor is connected with the first end of the first switching tube;
the first end of the second resistor is used as a first input end, and the second end of the second resistor is connected with the control end of the first switching tube;
the first end of the second switch tube is used as a second output end, and the control end is connected with the first input end through the third resistor;
a first end of the fourth resistor is used as a second input end, and a second end of the fourth resistor is connected with the second output end;
in the same control unit, the first output end is connected with the control end of a PMOS tube in the drive circuit, and the second output end is connected with the control end of an NMOS tube in the drive circuit on the same side as the PMOS tube;
the first input of each of the control units is connected to the second input of another of the control units.
2. The motor drive control system of claim 1, wherein the first and second switching transistors are NPN transistors.
3. The motor driving control system according to claim 1, wherein each of the control units further comprises a fifth resistor, a first end of the fifth resistor is connected to the first output end, and a second end of the fifth resistor is connected to the source of the PMOS transistor corresponding to the first output end.
4. The motor driving control system according to any one of claims 1 to 3, wherein the driving circuit comprises two bridge arms, each of the two bridge arms comprises one PMOS tube and one NMOS tube, a source electrode of the PMOS tube is connected with a power supply, a drain electrode of the PMOS tube is respectively connected with a drain electrode of the NMOS tube and a power supply end of the motor, and a source electrode of the NMOS tube is grounded.
5. The motor drive control system of claim 4 wherein the drive circuit further comprises a current limiting resistor, the power supply being connected to each of the bridge arms through the current limiting resistor.
6. The motor drive control system of claim 4, further comprising a controller having a pair of signal outputs respectively connected to the first and second inputs of either of the control units.
7. An electric machine, comprising:
the motor drive control system according to any one of claims 1 to 6;
and the motor body is connected with the motor drive control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222027471.4U CN218162245U (en) | 2022-08-02 | 2022-08-02 | Motor drive control system and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222027471.4U CN218162245U (en) | 2022-08-02 | 2022-08-02 | Motor drive control system and motor |
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| Publication Number | Publication Date |
|---|---|
| CN218162245U true CN218162245U (en) | 2022-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222027471.4U Active CN218162245U (en) | 2022-08-02 | 2022-08-02 | Motor drive control system and motor |
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| CN (1) | CN218162245U (en) |
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- 2022-08-02 CN CN202222027471.4U patent/CN218162245U/en active Active
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