CN216056845U - Control circuit of direct current motor - Google Patents
Control circuit of direct current motor Download PDFInfo
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- CN216056845U CN216056845U CN202122174009.2U CN202122174009U CN216056845U CN 216056845 U CN216056845 U CN 216056845U CN 202122174009 U CN202122174009 U CN 202122174009U CN 216056845 U CN216056845 U CN 216056845U
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Abstract
The utility model provides a control circuit of a direct current motor, which comprises a first control unit, a second control unit, a third control unit, a fourth control unit, a power supply and a motor, wherein the first control unit is connected with the second control unit; the power supply is respectively connected with the positive pole and the negative pole of the motor, and the positive pole and the negative pole are respectively connected with the grounding terminal; the first control unit is connected with a first control end, and the second control unit is connected with a second control end; the first control unit is connected between the negative electrode and the grounding end, the fourth control unit is connected between the positive electrode and the power supply, and the first control unit is connected with the fourth control unit; the second control unit is connected between the anode and the grounding terminal; the third control unit is connected between the negative electrode and the power supply, and the second control unit is connected with the third control unit; the four control units are connected to the positive pole and the negative pole of the motor, and the four control units are controlled to be started and closed through two signals, so that the positive and negative rotation of the motor can be adjusted.
Description
Technical Field
The utility model relates to the technical field of direct current motors, in particular to a control circuit of a direct current motor.
Background
The dc motor can change the motor direction in the following two ways. One is to reverse the voltage across the armature and change the direction of the armature current. One is to change the polarity of the field winding, i.e. change the direction of the main magnetic field. The rotation direction of the direct current motor coil and the rotation direction of the motor are related to the current direction and the magnetic field direction in the motor coil, and the movement direction of the coil can be changed when any one factor of the current direction and the magnetic field direction in the motor coil is changed. The direction of rotation of the motor is typically changed by changing the direction of the current in the coils.
In the prior art, a forward/reverse switching circuit of a dc motor mostly adopts a control chip to control four switching devices, i.e. an H-bridge circuit, connected in series in a motor loop.
For example, fig. 4 shows a conventional forward/reverse rotation H-bridge driving circuit of a dc motor, each switch in the H-bridge driving circuit has a driving signal (DRV1, DRV2, DRV3, and DRV4), and the H-bridge driving circuit controls a plurality of driving signals, and has a complex driving manner, and occupies more resources of a control unit.
Fig. 5 shows a push-pull type dc motor forward/reverse rotation bridge driving circuit, although there are only two driving signals (DRV1, DRV2) at the control end, there are two disadvantages in the push-pull type driving method, 1, when the driving signal is rising or falling, the upper and lower switching tubes on the same side of the bridge are common, for example, the rising or falling time is long, and there is a risk that the upper and lower switching tubes on the same side are conducted at the same time and burned out. 2, when the driving signal voltage is lower than the power supply voltage VCC, the upper side switch tube in the bridge circuit can not be effectively closed, and the risk that the upper switch tube and the lower switch tube on the same side are simultaneously conducted and burned out exists.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been made to provide a control circuit of a direct current motor that overcomes or at least partially solves the above problems.
In order to solve the above problems, the present invention discloses a control circuit of a dc motor, comprising: the control system comprises a first control unit, a second control unit, a third control unit, a fourth control unit, a power supply VCC and a motor M; the power supply VCC is respectively connected with the positive pole and the negative pole of the motor M, and the positive pole and the negative pole are respectively connected with the ground terminal GND; the first control unit is connected with a first control end, and the second control unit is connected with a second control end; the first control end is used for outputting a first signal to the first control unit, and the second control end is used for outputting a second signal;
the first control unit is connected between the negative electrode and the ground terminal GND, the fourth control unit is connected between the positive electrode and the power supply VCC, and the first control unit is connected with the fourth control unit; the second control unit is connected between the positive electrode and the ground terminal GND; the third control unit is connected between the negative electrode and the power supply VCC, and the second control unit is connected with the third control unit;
when the first signal is at a high level and the second signal is at a low level, the second control unit disconnects the positive electrode from the ground terminal GND according to the second signal, the first control unit conducts the negative electrode from the ground terminal GND according to the first signal and transmits the first signal to the fourth control unit, and the fourth control unit conducts the positive electrode from the power source VCC according to the first signal so as to rotate the motor M forward;
when the first signal is at a low level and the second signal is at a high level, the first control unit disconnects the negative electrode from the ground terminal GND according to the first signal, the second control unit connects the positive electrode with the ground terminal GND according to the second signal and transmits the second signal to the third control unit, and the third control unit connects the negative electrode with the power source VCC according to the second signal so as to reverse the motor M.
Optionally, the first control unit comprises a field effect transistor N1; the grid electrode of the field effect transistor N1 is connected with the first control end, the drain electrode of the field effect transistor N1 is respectively connected with the negative electrode and the fourth control unit, and the source electrode of the field effect transistor N1 is connected with the ground end GND.
Optionally, the second control unit comprises a field effect transistor N2; the grid electrode of the field effect transistor N2 is connected with the second control end, the drain electrode of the field effect transistor N2 is respectively connected with the anode and the third control unit, and the source electrode of the field effect transistor N2 is connected with the ground end GND.
Optionally, the third control unit comprises a field effect transistor P1 and a resistor R1; the source electrode of field effect transistor P1 with the positive pole of power VCC is connected, field effect transistor P1's drain electrode with the negative pole is connected, resistance R1's first end connect in field effect transistor P1's source electrode with between the positive pole of power VCC, resistance R1's second end with field effect transistor N2's drain electrode is connected, field effect transistor P1's gate connection in resistance R1's second end with between field effect transistor N2's the drain electrode.
Optionally, the fourth control unit comprises a field effect transistor P2 and a resistor R2; the source electrode of field effect transistor P2 with the positive pole of power VCC is connected, field effect transistor P2's drain electrode with the positive pole is connected, resistance R2's first end connect in field effect transistor P2's source electrode with between the positive pole of power VCC, resistance R2's second end with field effect transistor N1's drain electrode is connected, field effect transistor P2's gate connection in resistance R2's second end with between field effect transistor N1's the drain electrode.
Optionally, the system further comprises a first protection unit and a second protection unit; the first protection unit is connected between the second control unit and the third control unit, and the second protection unit is connected between the first control unit and the fourth control unit.
Optionally, the first protection unit includes a resistor R3, and the second protection unit includes a resistor R4; the resistor R3 is connected between the gate of the FET P1 and the drain of the FET N2, and the resistor R4 is connected between the gate of the FET P2 and the drain of the FET N1.
Optionally, the system further comprises a third protection unit and a fourth protection unit; the first end of the third protection unit is connected between the source electrode of the field effect transistor P1 and the first end of the resistor R1, the second end of the third protection unit is connected between the second end of the resistor R1 and the first end of the resistor R3, and the second end of the third protection unit is connected with the gate electrode of the field effect transistor P1; the first terminal of the fourth protection unit is connected between the source of the fet P2 and the first terminal of the resistor R2, the second terminal of the fourth protection unit is connected between the second terminal of the resistor R2 and the first terminal of the resistor R4, and the second terminal of the fourth protection unit is connected to the gate of the fet P2.
Optionally, the third protection unit includes a diode D1, and the fourth protection unit includes a diode D2.
Optionally, the fet N1 and the fet N2 are N-channel fets, and the fet P1 and the fet P2 are P-channel fets.
The utility model has the following advantages: the control system comprises a first control unit, a second control unit, a third control unit, a fourth control unit, a power supply VCC and a motor M; the power supply VCC is respectively connected with the positive pole and the negative pole of the motor M, and the positive pole and the negative pole are respectively connected with the ground terminal GND; the first control unit is connected with a first control end, and the second control unit is connected with a second control end; the first control end is used for outputting a first signal to the first control unit, and the second control end is used for outputting a second signal; the first control unit is connected between the negative electrode and the ground terminal GND, the fourth control unit is connected between the positive electrode and the power supply VCC, and the first control unit is connected with the fourth control unit; the second control unit is connected between the positive electrode and the ground terminal GND; the third control unit is connected between the negative electrode and the power supply VCC, and the second control unit is connected with the third control unit; when the first signal is at a high level and the second signal is at a low level, the second control unit disconnects the positive electrode from the ground terminal GND according to the second signal, the first control unit conducts the negative electrode from the ground terminal GND according to the first signal and transmits the first signal to the fourth control unit, and the fourth control unit conducts the positive electrode from the power source VCC according to the first signal so as to rotate the motor M forward; when the first signal is at a low level and the second signal is at a high level, the first control unit disconnects the negative electrode from the ground terminal GND according to the first signal, the second control unit connects the positive electrode with the ground terminal GND according to the second signal and transmits the second signal to the third control unit, and the third control unit connects the negative electrode with the power source VCC according to the second signal so as to reverse the motor M. The four control units are connected to the positive pole and the negative pole of the motor M, and the four control units are controlled to be started and closed through two signals, so that the positive and negative rotation of the motor M can be adjusted.
Drawings
Fig. 1 is a first structural schematic diagram of a control circuit of a dc motor of the present invention;
FIG. 2 is a second schematic diagram of a control circuit of a DC motor according to the present invention;
FIG. 3 is a schematic diagram of a third structure of a control circuit of a DC motor according to the present invention;
FIG. 4 is a schematic diagram of a first prior art H-bridge circuit;
fig. 5 is a schematic diagram of a second structure of an H-bridge circuit in the prior art.
Description of the drawings: 1. the protection device comprises a first control unit, a second control unit, a third control unit, a fourth control unit, a first protection unit, a second protection unit, a third protection unit, a fourth protection unit, a first control unit, a second control unit, a third control unit, a fourth control unit, a first protection unit, a second protection unit, a third protection unit, a fourth protection unit, a first control end, a third protection unit, a fourth protection unit, a second control end, a first control end, a second control end and a fourth protection unit, wherein the first control unit, the second control unit, the third protection unit, the second protection unit, the third protection unit, the fourth protection unit, the second control end, the third protection unit, the fourth protection unit, the second protection unit, the third protection unit, the fourth protection unit, the second control end, the third protection unit, the fourth protection unit, and the fourth protection unit, 9, and the third protection unit, 8, the second control end, and the second control end are respectively.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
One of the core concepts of the present invention is that, through the first control unit 1, the second control unit 2, the third control unit 3, the fourth control unit 4, the power source VCC and the motor M; the power supply VCC is respectively connected with the positive pole and the negative pole of the motor M, and the positive pole and the negative pole are respectively connected with the ground terminal GND; the first control unit 1 is connected with a first control end 9, and the second control unit 2 is connected with a second control end 10; the first control terminal 9 is configured to output a first signal to the first control unit 1, and the second control terminal 10 is configured to output a second signal; the first control unit 1 is connected between the negative electrode and the ground terminal GND, the fourth control unit 4 is connected between the positive electrode and the power supply VCC, and the first control unit 1 is connected with the fourth control unit 4; the second control unit 2 is connected between the positive electrode and the ground terminal GND; the third control unit 3 is connected between the negative electrode and the power supply VCC, and the second control unit 2 is connected with the third control unit 3; when the first signal is at a high level and the second signal is at a low level, the second control unit 2 disconnects the positive electrode from the ground terminal GND according to the second signal, the first control unit 1 switches on the negative electrode and the ground terminal GND according to the first signal and transmits the first signal to the fourth control unit 4, and the fourth control unit 4 switches on the positive electrode and the power source VCC according to the first signal, so that the motor M rotates forwards; when the first signal is a low level and the second signal is a high level, the first control unit 1 disconnects the negative electrode from the ground terminal GND according to the first signal, the second control unit 2 connects the positive electrode from the ground terminal GND according to the second signal, and transmits the second signal to the third control unit 3, and the third control unit 3 connects the negative electrode from the power source VCC according to the second signal, so that the motor M is reversed. The four control units are connected to the positive pole and the negative pole of the motor M, and the four control units are controlled to be started and closed through two signals, so that the positive and negative rotation of the motor M can be adjusted.
Referring to fig. 1 to 3, there are shown schematic structural diagrams of a control circuit of a dc motor according to the present invention, which may specifically include: a first control unit 1, a second control unit 2, a third control unit 3, a fourth control unit 4, a power supply VCC and a motor M; the power supply VCC is respectively connected with the positive pole and the negative pole of the motor M, and the positive pole and the negative pole are respectively connected with the ground terminal GND; the first control unit 1 is connected with a first control end 9, and the second control unit 2 is connected with a second control end 10; the first control terminal 9 is configured to output a first signal to the first control unit 1, and the second control terminal 10 is configured to output a second signal;
the first control unit 1 is connected between the negative electrode and the ground terminal GND, the fourth control unit 4 is connected between the positive electrode and the power supply VCC, and the first control unit 1 is connected with the fourth control unit 4; the second control unit 2 is connected between the positive electrode and the ground terminal GND; the third control unit 3 is connected between the negative electrode and the power supply VCC, and the second control unit 2 is connected with the third control unit 3;
when the first signal is at a high level and the second signal is at a low level, the second control unit 2 disconnects the positive electrode from the ground terminal GND according to the second signal, the first control unit 1 switches on the negative electrode and the ground terminal GND according to the first signal and transmits the first signal to the fourth control unit 4, and the fourth control unit 4 switches on the positive electrode and the power source VCC according to the first signal, so that the motor M rotates forwards;
when the first signal is a low level and the second signal is a high level, the first control unit 1 disconnects the negative electrode from the ground terminal GND according to the first signal, the second control unit 2 connects the positive electrode from the ground terminal GND according to the second signal, and transmits the second signal to the third control unit 3, and the third control unit 3 connects the negative electrode from the power source VCC according to the second signal, so that the motor M is reversed.
In the embodiment of the present application, the first control unit 1, the second control unit 2, the third control unit 3, the fourth control unit 4, the power source VCC and the motor M; the power supply VCC is respectively connected with the positive pole and the negative pole of the motor M, and the positive pole and the negative pole are respectively connected with the ground terminal GND; the first control unit 1 is connected with a first control end 9, and the second control unit 2 is connected with a second control end 10; the first control terminal 9 is configured to output a first signal to the first control unit 1, and the second control terminal 10 is configured to output a second signal; the first control unit 1 is connected between the negative electrode and the ground terminal GND, the fourth control unit 4 is connected between the positive electrode and the power supply VCC, and the first control unit 1 is connected with the fourth control unit 4; the second control unit 2 is connected between the positive electrode and the ground terminal GND; the third control unit 3 is connected between the negative electrode and the power supply VCC, and the second control unit 2 is connected with the third control unit 3; when the first signal is at a high level and the second signal is at a low level, the second control unit 2 disconnects the positive electrode from the ground terminal GND according to the second signal, the first control unit 1 switches on the negative electrode and the ground terminal GND according to the first signal and transmits the first signal to the fourth control unit 4, and the fourth control unit 4 switches on the positive electrode and the power source VCC according to the first signal, so that the motor M rotates forwards; when the first signal is a low level and the second signal is a high level, the first control unit 1 disconnects the negative electrode from the ground terminal GND according to the first signal, the second control unit 2 connects the positive electrode from the ground terminal GND according to the second signal, and transmits the second signal to the third control unit 3, and the third control unit 3 connects the negative electrode from the power source VCC according to the second signal, so that the motor M is reversed. The four control units are connected to the positive pole and the negative pole of the motor M, and the four control units are controlled to be started and closed through two signals, so that the positive and negative rotation of the motor M can be adjusted.
Next, a control circuit of the direct current motor in the present exemplary embodiment will be further described.
In an embodiment of the present application, said first control unit 1 comprises a field effect transistor N1; the gate of the fet N1 is connected to the first control terminal 9, the drain of the fet N1 is connected to the negative electrode and the fourth control unit 4, respectively, and the source of the fet N1 is connected to the ground GND.
In an embodiment of the present application, the second control unit 2 comprises a field effect transistor N2; the gate of the fet N2 is connected to the second control terminal 10, the drain of the fet N2 is connected to the anode and the third control unit 3, respectively, and the source of the fet N2 is connected to the ground GND.
In an embodiment of the present application, the third control unit 3 includes a field effect transistor P1 and a resistor R1; the source electrode of field effect transistor P1 with the positive pole of power VCC is connected, field effect transistor P1's drain electrode with the negative pole is connected, resistance R1's first end connect in field effect transistor P1's source electrode with between the positive pole of power VCC, resistance R1's second end with field effect transistor N2's drain electrode is connected, field effect transistor P1's gate connection in resistance R1's second end with between field effect transistor N2's the drain electrode.
In an embodiment of the present application, the fourth control unit 4 comprises a fet P2 and a resistor R2; the source electrode of field effect transistor P2 with the positive pole of power VCC is connected, field effect transistor P2's drain electrode with the positive pole is connected, resistance R2's first end connect in field effect transistor P2's source electrode with between the positive pole of power VCC, resistance R2's second end with field effect transistor N1's drain electrode is connected, field effect transistor P2's gate connection in resistance R2's second end with between field effect transistor N1's the drain electrode.
As an example, the control circuit of the dc motor only needs to turn on the first control terminal 9 and the second control terminal 10, and turn on the upper and lower control units (i.e. the first control unit 1, the second control unit 2, the third control unit 3 and the fourth control unit 4) at opposite ends to drive the motor M forward and backward, the first control terminal 9 and the second control terminal 10 may be PWM or alternatively high and low, the first signal and the second signal may be simultaneously low, at this time, each control unit is turned off, the motor M stops working, the first signal and the second signal cannot be simultaneously high, and a dead time Td needs to be added between the first signal and the second signal, the dead time Td can be determined according to the switching characteristics of the control units, and the upper and lower control units at opposite ends are driven in a linked manner, each device of the circuit can effectively and safely work and operate.
In an embodiment of the present application, the device further comprises a first protection unit 5 and a second protection unit 6; the first protection unit 5 is connected between the second control unit 2 and the third control unit 3, and the second protection unit 6 is connected between the first control unit 1 and the fourth control unit 4.
In an embodiment of the present application, the first protection unit 5 includes a resistor R3, and the second protection unit 6 includes a resistor R4; the resistor R3 is connected between the gate of the FET P1 and the drain of the FET N2, and the resistor R4 is connected between the gate of the FET P2 and the drain of the FET N1.
In an embodiment of the present application, the protection device further includes a third protection unit 7 and a fourth protection unit 8; the first terminal of the third protection unit 7 is connected between the source of the fet P1 and the first terminal of the resistor R1, the second terminal of the third protection unit 7 is connected between the second terminal of the resistor R1 and the first terminal of the resistor R3, and the second terminal of the third protection unit 7 is connected to the gate of the fet P1; the first terminal of the fourth protection unit 8 is connected between the source of the fet P2 and the first terminal of the resistor R2, the second terminal of the fourth protection unit 8 is connected between the second terminal of the resistor R2 and the first terminal of the resistor R4, and the second terminal of the fourth protection unit 8 is connected to the gate of the fet P2.
In an embodiment of the present application, the third protection unit 7 includes a diode D1, and the fourth protection unit 8 includes a diode D2.
In an embodiment of the present application, the fet N1 and the fet N2 are N-channel fets, and the fet P1 and the fet P2 are P-channel fets.
In a specific implementation, the motor M rotates forward in the following manner: the second signal low level, field effect transistor N2, field effect transistor P1 switch are closed, the first signal high level to the G (gate) of field effect transistor N1, driving voltage VGS makes field effect transistor N1 switch on, the D (drain) electric potential of field effect transistor N1 changes from high level to low level, simultaneously pulls down the G (gate) of field effect transistor P2 through resistance R4, VGS of field effect transistor P2 generates negative pressure, field effect transistor P2 switches on, realizes the linkage drive of upper and lower switch tubes at the different side end. The power VCC positive pole passes through field effect transistor P2 adds the positive pole of motor M, through the motor M negative pole arrives field effect transistor N1 arrives the power VCC negative pole, motor M switches on, realizes motor M corotation.
The motor M realizes a reverse rotation mode: the first signal low level, field effect transistor N1, field effect transistor P2 switch are closed, the second signal high level to the G (grid) of field effect transistor N2, driving voltage VGS makes field effect transistor N2 switch on, the D (drain) electric potential of field effect transistor N2 becomes low level by the high level, simultaneously through resistance R3 draws low G (grid) of field effect transistor P1, the VGS of field effect transistor P1 produces the negative pressure, field effect transistor P1 switches on, realizes the linkage drive of the upper and lower switch tubes of different sides. The power VCC positive pole passes through field effect transistor P1 adds motor M's negative pole, through motor M is anodal arrives field effect transistor N2 arrives power VCC negative pole, motor M switches on, realizes motor M reverses.
In one particular implementation, the motor protection function: the VGS of the P-type field effect transistor (namely the field effect transistor P1 and the field effect transistor P2) of the upper switch tube increases the protection function. When the power source VCC is greater than the voltage withstanding of the VGS of the P-type fet, there is a risk of breakdown damage to the upper fet, and therefore, the fet P1 and the fet P2 are protected by the first protection unit 5 and the second protection unit 6, and further protected by the voltage division of the third protection unit 7 and the fourth protection unit 8. Therefore, the protection circuit can be applied to the situation that the voltage of the power supply VCC is larger than the voltage withstanding of the upper tube VGS, and the application situation of the circuit is expanded.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The control circuit of the dc motor provided by the present invention is described in detail above, and the principle and the implementation of the present invention are explained in detail herein by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A control circuit for a dc motor, comprising: the control system comprises a first control unit, a second control unit, a third control unit, a fourth control unit, a power supply VCC and a motor M; the power supply VCC is respectively connected with the positive pole and the negative pole of the motor M, and the positive pole and the negative pole are respectively connected with the ground terminal GND; the first control unit is connected with a first control end, and the second control unit is connected with a second control end; the first control end is used for outputting a first signal to the first control unit, and the second control end is used for outputting a second signal;
the first control unit is connected between the negative electrode and the ground terminal GND, the fourth control unit is connected between the positive electrode and the power supply VCC, and the first control unit is connected with the fourth control unit; the second control unit is connected between the positive electrode and the ground terminal GND; the third control unit is connected between the negative electrode and the power supply VCC, and the second control unit is connected with the third control unit;
when the first signal is at a high level and the second signal is at a low level, the second control unit disconnects the positive electrode from the ground terminal GND according to the second signal, the first control unit conducts the negative electrode from the ground terminal GND according to the first signal and transmits the first signal to the fourth control unit, and the fourth control unit conducts the positive electrode from the power source VCC according to the first signal so as to rotate the motor M forward;
when the first signal is at a low level and the second signal is at a high level, the first control unit disconnects the negative electrode from the ground terminal GND according to the first signal, the second control unit connects the positive electrode with the ground terminal GND according to the second signal and transmits the second signal to the third control unit, and the third control unit connects the negative electrode with the power source VCC according to the second signal so as to reverse the motor M.
2. The control circuit of the direct current motor according to claim 1, wherein the first control unit includes a field effect transistor N1; the grid electrode of the field effect transistor N1 is connected with the first control end, the drain electrode of the field effect transistor N1 is respectively connected with the negative electrode and the fourth control unit, and the source electrode of the field effect transistor N1 is connected with the ground end GND.
3. The control circuit of the direct current motor according to claim 2, wherein the second control unit includes a field effect transistor N2; the grid electrode of the field effect transistor N2 is connected with the second control end, the drain electrode of the field effect transistor N2 is respectively connected with the anode and the third control unit, and the source electrode of the field effect transistor N2 is connected with the ground end GND.
4. The control circuit of the direct current motor according to claim 3, wherein the third control unit includes a field effect transistor P1 and a resistor R1; the source electrode of field effect transistor P1 with the positive pole of power VCC is connected, field effect transistor P1's drain electrode with the negative pole is connected, resistance R1's first end connect in field effect transistor P1's source electrode with between the positive pole of power VCC, resistance R1's second end with field effect transistor N2's drain electrode is connected, field effect transistor P1's gate connection in resistance R1's second end with between field effect transistor N2's the drain electrode.
5. The control circuit of the direct current motor according to claim 4, wherein the fourth control unit includes a field effect transistor P2 and a resistor R2; the source electrode of field effect transistor P2 with the positive pole of power VCC is connected, field effect transistor P2's drain electrode with the positive pole is connected, resistance R2's first end connect in field effect transistor P2's source electrode with between the positive pole of power VCC, resistance R2's second end with field effect transistor N1's drain electrode is connected, field effect transistor P2's gate connection in resistance R2's second end with between field effect transistor N1's the drain electrode.
6. The control circuit of the direct current motor according to claim 5, further comprising a first protection unit and a second protection unit; the first protection unit is connected between the second control unit and the third control unit, and the second protection unit is connected between the first control unit and the fourth control unit.
7. The control circuit of the direct current motor according to claim 6, wherein the first protection unit includes a resistor R3, and the second protection unit includes a resistor R4; the resistor R3 is connected between the gate of the FET P1 and the drain of the FET N2, and the resistor R4 is connected between the gate of the FET P2 and the drain of the FET N1.
8. The control circuit of the direct current motor according to claim 7, further comprising a third protection unit and a fourth protection unit; the first end of the third protection unit is connected between the source electrode of the field effect transistor P1 and the first end of the resistor R1, the second end of the third protection unit is connected between the second end of the resistor R1 and the first end of the resistor R3, and the second end of the third protection unit is connected with the gate electrode of the field effect transistor P1; the first terminal of the fourth protection unit is connected between the source of the fet P2 and the first terminal of the resistor R2, the second terminal of the fourth protection unit is connected between the second terminal of the resistor R2 and the first terminal of the resistor R4, and the second terminal of the fourth protection unit is connected to the gate of the fet P2.
9. The control circuit of the dc motor of claim 8, wherein the third protection unit comprises a diode D1, and the fourth protection unit comprises a diode D2.
10. The control circuit of a dc motor according to claim 5, wherein said fet N1 and fet N2 are N channel fets and said fet P1 and fet P2 are P channel fets.
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| CN202122174009.2U CN216056845U (en) | 2021-09-08 | 2021-09-08 | Control circuit of direct current motor |
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| CN202122174009.2U CN216056845U (en) | 2021-09-08 | 2021-09-08 | Control circuit of direct current motor |
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| CN (1) | CN216056845U (en) |
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2021
- 2021-09-08 CN CN202122174009.2U patent/CN216056845U/en active Active
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