Circuit for driving multiple motors to regulate speed

Abstract

The utility model relates to a circuit for driving speed regulation of multiple motors, and relates to the technical field of direct current motor control, the circuit comprises an MOS tube, and the S pole of the MOS tube is grounded; the signal output end of the pre-drive circuit is electrically connected with the G electrode of the MOS tube; a plurality of motors; the first ends of the plurality of motors are electrically connected with the first switching circuit, the first common end of the first switching circuit is electrically connected with the power supply, and the second common end of the first switching circuit is electrically connected with the D electrode of the MOS tube; and the second ends of the plurality of motors are electrically connected with the second switching circuit, the first common end of the second switching circuit is electrically connected with the power supply, and the second common end of the second switching circuit is electrically connected with the D electrode of the MOS tube. The multiple motors are controlled by sharing the MOS tubes and the pre-drive circuit, the number of electrical elements of the circuit is reduced, and therefore the cost of the circuit is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of direct current motor control, and in particular to a circuit for driving multiple motors to adjust their speeds. Background Art

[0002] At present, DC motors are widely used in many fields, such as the opening and retraction of hidden handles in cars, the lifting and lowering of window glass, and the opening and closing of tailgate support rods. These applications require the motor to have speed regulation function to achieve smoother and more precise operation.

[0003] However, the existing DC motor speed control scheme has some shortcomings. When driving a single motor for speed control, it is usually necessary to configure 2 single-cell relays, a MOS tube and a pre-drive circuit. If you want to drive multiple motors for speed control at the same time, you need to increase the number of relays, MOS tubes and pre-drive circuits by multiples according to the number of motors, that is, driving N motors requires 2N single-cell relays, N MOS tubes and N pre-drive circuits. This configuration method leads to high circuit cost, which is not conducive to large-scale application and promotion. Utility Model Content

[0004] The present application provides a circuit for driving the speed regulation of multiple motors, the purpose of which is to reduce the number of electrical components of the circuit for controlling the multiple motors, thereby reducing the circuit cost.

[0005] The present application provides a circuit for driving multiple motors to adjust speeds using the following technical solution:

[0006] A circuit for driving multiple motors to adjust their speeds, comprising a MOS tube, wherein the S pole of the MOS tube is grounded; a pre-driving circuit, wherein the signal output end of the pre-driving circuit is electrically connected to the G pole of the MOS tube; a plurality of motors; a first switching circuit, wherein the first ends of the plurality of motors are electrically connected to the first switching circuit, the first common end of the first switching circuit is electrically connected to a power supply, and the second common end of the first switching circuit is electrically connected to the D pole of the MOS tube; the first switching circuit is used to switch the first end of the corresponding motor to be electrically connected to the power supply or the D pole of the MOS tube; a second switching circuit, wherein the second ends of the plurality of motors are electrically connected to the second switching circuit, the first common end of the second switching circuit is electrically connected to the power supply, and the second common end of the second switching circuit is electrically connected to the D pole of the MOS tube; the second switching circuit is used to switch the second end of the corresponding motor to be electrically connected to the power supply or the D pole of the MOS tube.

[0007] By adopting the above technical solution, first, the signal output end of the pre-drive circuit is electrically connected to the G pole of the MOS tube, and the S pole of the MOS tube is grounded. When the pre-drive circuit outputs a signal, the MOS tube is turned on and the D pole of the MOS tube is grounded.

[0008] Secondly, the first switching circuit is configured to electrically connect the first end of each motor to the power supply or the D pole of the MOS tube. The second switching circuit is configured to electrically connect the second end of each motor to the power supply or the D pole of the MOS tube.

[0009] Based on this setting, when the first end of the motor is electrically connected to the power supply, and the second end is electrically connected to the D pole of the MOS tube, the first end of the motor is at a high potential, and the second end is grounded, and the motor can rotate forward. Similarly, when the first end of the motor is electrically connected to the D pole of the MOS tube, and the second end is electrically connected to the power supply, the motor rotates in the reverse direction. In addition, during the rotation process of the motor, the speed of the motor can be adjusted by controlling the signal output frequency of the pre-drive circuit.

[0010] Therefore, through the cooperation of the MOS tube, the pre-drive circuit, the first switching circuit and the second switching circuit, the forward rotation, reverse rotation and speed regulation control of several motors can be realized.

[0011] Since only one MOS tube and one pre-driving circuit are needed, the number of electrical components in the circuit can be reduced, thereby reducing the circuit cost.

[0012] Optionally, the first switching circuit includes a plurality of first relays, which are arranged one-to-one corresponding to the motors; a moving contact of the first relay is electrically connected to the first end of the corresponding motor, a static contact of the first relay is electrically connected to the power supply, and another static contact of the first relay is electrically connected to the D pole of the MOS tube.

[0013] By adopting the above technical solution, the first switching circuit includes a plurality of first relays corresponding to the motors one by one, and such a setting allows independent control of the first end of each motor. The moving contact of each first relay is connected to the first end of the motor. By controlling the attraction and release of the first relay, the first end of the motor can be switched between the connection of the power supply and the D pole of the MOS tube, thereby controlling the direction of the motor. Therefore, this design not only provides a high degree of flexibility and independence, but also makes the control of each motor more refined, which helps to realize complex motor control strategies.

[0014] Optionally, the first switching circuit includes a first relay, the first ends of the several motors are electrically connected to the moving contact of the first relay, a static contact of the first relay is electrically connected to the power supply, and another static contact of the first relay is electrically connected to the D pole of the MOS tube.

[0015] By adopting the above technical solution, the first switching circuit controls the first ends of all motors through a first relay, which simplifies the circuit design and reduces the number of components. This design allows the first ends of all motors to be synchronously controlled through a single control point to achieve unified power connection or disconnection. Therefore, through this simplified switching circuit, efficient control of the synchronous operation of all motors can be achieved while maintaining the simplicity and cost-effectiveness of the design.

[0016] Optionally, the second switching circuit includes a plurality of second relays, which are arranged one-to-one corresponding to the motors; the moving contact of the second relay is electrically connected to the second end of the corresponding motor, one static contact of the second relay is electrically connected to the power supply, and another static contact of the second relay is electrically connected to the D pole of the MOS tube.

[0017] By adopting the above technical solution, the second switching circuit includes a plurality of second relays corresponding to the motors one by one. This design allows the second end of each motor to be independently controlled.

[0018] When the first switching circuit includes a first relay, the first ends of the plurality of motors are synchronously controlled, and the second ends of the plurality of motors are independently controlled, so that each motor can be started and stopped independently, and the directions of the motors working at the same time are the same. In this case, the speed of each motor can be controlled by controlling the output signal of the pre-drive circuit. At this time, there are N motors, and the total number of relays is N+1, and there is only one pre-drive motor and MOS tube, which can further reduce the circuit cost.

[0019] When the first switching circuit includes a plurality of first relays, the first end and the second end of the motor are independently controlled, so that each motor can be started and stopped independently, and the rotation direction can be freely controlled. In this case, the speed of all motors can be controlled by controlling the output signal of the pre-drive circuit. At this time, there are N motors, the total number of relays is 2N, and there is only one pre-drive motor and MOS tube, which can reduce the circuit cost.

[0020] Optionally, the second switching circuit includes a second relay, the second ends of the several motors are electrically connected to the moving contact of the second relay, a static contact of the second relay is electrically connected to the power supply, and another static contact of the second relay is electrically connected to the D pole of the MOS tube.

[0021] By adopting the above technical solution, the second switching circuit includes a second relay. This design controls the second ends of all motors through a single second relay, further simplifying the circuit configuration. This single control point design allows centralized control of the second ends of all motors, simplifying wiring and the number of components. Therefore, this design not only reduces costs, but also improves circuit integration and maintenance efficiency.

[0022] When the first switching circuit includes a first relay, the first and second ends of the plurality of motors are synchronously controlled, so that all the motors are started and stopped synchronously and rotate synchronously. In this case, the speed of each motor can be controlled by controlling the output signal of the pre-drive circuit. At this time, there are N motors, the total number of relays is two, and there is only one pre-drive motor and one MOS tube, which can further reduce the circuit cost.

[0023] When the first switching circuit includes a plurality of first relays, the first ends of the motors are independently controlled and the second ends are synchronously controlled, so that each motor can be started and stopped independently, and the directions of the motors working at the same time are the same. In this case, the speed of each motor can be controlled by controlling the output signal of the pre-drive circuit. At this time, there are N motors, and the total number of relays is N+1, and there is only one pre-drive motor and MOS tube, which can further reduce the circuit cost.

[0024] Optionally, both the first relay and the second relay are single-cell relays.

[0025] By adopting the above technical solution, the first relay and the second relay are both single-cell relays, and this design choice helps to reduce costs and simplify the complexity of the circuit. The use of single-cell relays ensures that the control path of each motor is simple and cost-effective. Therefore, this design not only reduces material and manufacturing costs, but also improves the reliability of the circuit and the convenience of maintenance.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The present application controls multiple motors by sharing MOS tubes and pre-drive circuits, thereby reducing the number of electrical components in the circuit, thereby reducing the cost of the circuit, simplifying the circuit layout, reducing wiring complexity, and contributing to the miniaturization and integration of the circuit, making the overall design more economical and efficient.

[0028] 2. The present application can select the number of first relays and second relays according to different working requirements, thereby reducing the number of relays while meeting different working requirements, which can further reduce circuit costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a circuit structure block diagram of Example 1 of the present application.

[0030] Figure 2 It is a schematic diagram of the circuit structure of Example 1 of the present application.

[0031] Figure 3 This is another structural schematic diagram of the circuit of Example 1 of the present application.

[0032] Figure 4 This is a schematic diagram of the circuit structure of Example 2 of the present application.

[0033] Figure 5 This is a schematic diagram of the circuit structure of Example 3 of the present application.

[0034] Figure 6 This is a schematic diagram of the circuit structure of Example 4 of the present application.

[0035] In the figure, 1, pre-driving circuit; 2, MOS tube; 3, first switching circuit; 31, first relay;

[0036] 4. Second switching circuit; 41. Second relay; 5. Motor. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0038] Embodiment 1: A circuit for driving multiple motors to adjust speed, referring to Figure 1 , including a pre-driving circuit 1, a MOS tube 2, a first switching circuit 3, a second switching circuit 4 and a plurality of motors 5. In this embodiment, the motor 5 is a DC motor.

[0039] Reference Figure 1 The signal output terminal of the pre-drive circuit 1 is electrically connected to the G pole of the MOS tube 2, and the S pole of the MOS tube 2 is grounded. When the pre-drive circuit 1 outputs a signal, the MOS tube 2 is turned on, and the D pole of the MOS tube 2 is grounded.

[0040] Reference Figure 1 The first ends of the motors 5 are all electrically connected to the first switching circuit 3, one common end of the first switching circuit 3 is electrically connected to the power supply, and the other common end is electrically connected to the D pole of the MOS tube 2. Under the control of the first switching circuit 3, the first end of each motor 5 can be electrically connected to the power supply or to the D pole of the MOS tube 2.

[0041] Specifically, refer to Figure 2In this embodiment, the first switching circuit 3 includes a plurality of first relays 31, and the first relays 31 are arranged one by one with the motors 5. The moving contact of the first relay 31 is electrically connected to the first end of the corresponding motor 5, one static contact of the first relay 31 is electrically connected to the power supply, and the other static contact of the first relay 31 is electrically connected to the D pole of the MOS tube 2. The coil of the first relay 31 is electrically connected to the control chip. In this embodiment, when the coil is de-energized, the moving contact of the first relay 31 is electrically connected to the D pole of the MOS tube 2; when the coil is energized, the moving contact of the first relay 31 is electrically connected to the power supply. Therefore, by controlling the corresponding first relay 31, the first end of the corresponding motor 5 can be controlled to be electrically connected to the power supply or to the D pole of the MOS tube 2.

[0042] Reference Figure 1 , the second ends of the motors 5 are electrically connected to the second switching circuit 4, one common end of the second switching circuit 4 is electrically connected to the power supply, and the other common end is electrically connected to the D pole of the MOS tube 2. Under the control of the second switching circuit 4, the second end of each motor 5 can be electrically connected to the power supply or to the D pole of the MOS tube 2.

[0043] Specifically, this reference Figure 2 In the embodiment, the second switching circuit 4 includes a second relay 41, a moving contact of the second relay 41 is electrically connected to the second end of the plurality of motors 5, a static contact of the second relay 41 is electrically connected to the power supply, and another static contact of the second relay 41 is electrically connected to the D pole of the MOS tube 2. The coil of the second relay 41 is electrically connected to the control chip. In this embodiment, when the coil is de-energized, the moving contact of the second relay 41 is electrically connected to the D pole of the MOS tube 2; when the coil is energized, the moving contact of the second relay 41 is electrically connected to the power supply. Therefore, by controlling the second relay 41, the second end of the corresponding motor 5 can be controlled to be electrically connected to the power supply or to the D pole of the MOS tube 2.

[0044] Reference Figure 2 When the pre-drive circuit 1 outputs a signal, both the first relay 31 and the second relay 41 have a static contact grounded.

[0045] In this case, the moving contact of the first relay 31 is controlled to be electrically connected to the power supply, and the moving contact of the second relay 41 is controlled to be electrically connected to the D pole of the MOS tube 2, then the first end of the corresponding motor 5 is at a high potential, and the second end is grounded, and the motor 5 can rotate forward at this time; on the contrary, when the moving contact of the first relay 31 is controlled to be electrically connected to the D pole of the MOS tube 2, and the moving contact of the second relay 41 is electrically connected to the power supply, the first end of the corresponding motor 5 is grounded, and the second end is connected to a high potential, and the motor 5 can be reversed at this time. At the same time, when the moving contacts of the first relay 31 and the second relay 41 are both electrically connected to the D pole of the MOS tube 2 or the power supply, the first end and the second end of the motor 5 are both grounded or connected to a high potential, and the motor 5 stops rotating at this time.

[0046] When the motor 5 is rotating, the reverse rotation speed of the motor 5 can be controlled by controlling the signal output frequency of the pre-driving circuit 1 .

[0047] Reference Figure 2 In this embodiment, the first relay 31 and the second relay 41 are both single-cell relays. In this embodiment, the motor 5 is provided with N (N is not less than two), the number of single-cell relays is N+1, and the MOS tube 2 and the pre-drive circuit 1 are each provided with one.

[0048] Reference Figure 3 In addition, in this embodiment, a twin relay can be used to replace two single relays.

[0049] The implementation principle of the embodiment of the present application is: the present application can control the corresponding motor 5 to rotate forward, reverse or stop by controlling the power on and off of the coil of the first relay 31 and the coil of the second relay 41 through the control chip. During the rotation of the motor 5, the speed of the motor 5 can be controlled by controlling the output signal of the pre-drive circuit 1. When there are multiple motors 5 with the same rotation direction among the multiple motors 5, the drive of multiple motors 5 can be realized through the scheme of this embodiment.

[0050] Embodiment 2: A circuit for driving multiple motors to adjust speed, referring to Figure 4 The difference between this embodiment and embodiment 1 is that the second switching circuit 4 includes a plurality of second relays 41, and the plurality of second relays 41 are arranged one by one corresponding to the motors 5, and the moving contact of the second relay 41 is electrically connected to the second end of the corresponding motor 5, one static contact of the second relay 41 is electrically connected to the power supply, and the other static contact of the second relay 41 is electrically connected to the D pole of the MOS tube 2. The coil of the second relay 41 is electrically connected to the control chip.

[0051] Reference Figure 4When the coil of the first relay 31 and the corresponding coil of the second relay 41 are both de-energized or energized, the corresponding motor 5 stops rotating; when the coil of the first relay 31 is energized and the corresponding second relay 41 is de-energized, the moving contact of the first relay 31 is electrically connected to the power supply, and the moving contact of the second relay 41 is electrically connected to the D pole of the MOS tube 2, then the corresponding motor 5 rotates forward; on the contrary, when the coil of the first relay 31 is de-energized and the corresponding second relay 41 is energized, the moving contact of the first relay 31 is electrically connected to the D pole of the MOS tube 2, and the moving contact of the second relay 41 is electrically connected to the voltage ring, then the corresponding motor 5 reverses.

[0052] Specifically, in this embodiment, N motors 5 are provided (N is not less than two), the number of unit-cell relays is 2N, and both the MOS tube 2 and the pre-drive circuit 1 are provided with one.

[0053] The implementation principle of the embodiment of the present application is: the present application can control each motor 5 to independently rotate forward, reverse or stop by controlling the power on and off of a plurality of first relay 31 coils and the corresponding second relay 41 coils.

[0054] Embodiment 3: A circuit for driving multiple motors to adjust speed, referring to Figure 5 The difference between this embodiment and embodiment 1 is that the first switching circuit 3 includes a first relay 31, and the first ends of the plurality of motors 5 are electrically connected to the moving contact of the first relay 31. The coil of the first relay 31 is electrically connected to the control chip. By controlling the first relay 31 to lose power and the second relay 41 to gain power, the plurality of motors 5 can be synchronously forward rotated; by controlling the first relay 31 to gain power and the second relay 41 to lose power, the plurality of motors 5 can be synchronously reversed.

[0055] Specifically, in this embodiment, N motors 5 are provided (N is not less than two), the number of unit-cell relays is 2, and the number of MOS tubes 2 and pre-driving circuits 1 are both provided with one.

[0056] The implementation principle of the embodiment of the present application is: the present application controls the synchronous start and stop of all motors 5 through a first relay 31 and a second relay 41, and enables each motor 5 to rotate in the same direction.

[0057] Embodiment 4: A circuit for driving multiple motors to adjust speed, referring to Figure 6 The difference between this embodiment and embodiment 1 is that the first switching circuit 3 includes a first relay 31, and the second switching circuit 4 includes a plurality of second relays 41. The implementation principle, implementation method and function of this embodiment and embodiment 2 are the same.

[0058] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A circuit for driving multiple motors to adjust speed, characterized in that: include: MOS tube (2), the S pole of the MOS tube (2) being grounded; A pre-driving circuit (1), wherein a signal output end of the pre-driving circuit (1) is electrically connected to a G pole of the MOS tube (2); Several motors (5); a first switching circuit (3), wherein the first ends of the plurality of motors (5) are electrically connected to the first switching circuit (3), the first common end of the first switching circuit (3) is electrically connected to a power source, and the second common end of the first switching circuit (3) is electrically connected to the D pole of the MOS tube (2); the first switching circuit (3) is used to switch the first end of the corresponding motor (5) to be electrically connected to the power source or the D pole of the MOS tube (2); A second switching circuit (4), the second ends of the plurality of motors (5) are electrically connected to the second switching circuit (4), the first common end of the second switching circuit (4) is electrically connected to a power source, and the second common end of the second switching circuit (4) is electrically connected to the D pole of the MOS tube (2); the second switching circuit (4) is used to switch the electrical connection between the second end of the corresponding motor (5) and the power source or the D pole of the MOS tube (2).

2. A circuit for driving multiple motors to adjust speeds according to claim 1, characterized in that: The first switching circuit (3) comprises a plurality of first relays (31), wherein the first relays (31) are arranged in a one-to-one correspondence with the motors (5); a moving contact of the first relay (31) is electrically connected to a first end of the corresponding motor (5), a stationary contact of the first relay (31) is electrically connected to a power source, and another stationary contact of the first relay (31) is electrically connected to a D pole of the MOS tube (2).

3. A circuit for driving multiple motors to adjust speeds according to claim 1, characterized in that: The first switching circuit (3) comprises a first relay (31), the first ends of the plurality of motors (5) are electrically connected to a moving contact of the first relay (31), a stationary contact of the first relay (31) is electrically connected to a power source, and another stationary contact of the first relay (31) is electrically connected to a D pole of the MOS tube (2).

4. A circuit for driving multiple motors to adjust speed according to claim 2 or 3, characterized in that: The second switching circuit (4) comprises a plurality of second relays (41), wherein the second relays (41) are arranged in a one-to-one correspondence with the motors (5); a moving contact of the second relay (41) is electrically connected to a second end of the corresponding motor (5), a stationary contact of the second relay (41) is electrically connected to a power source, and another stationary contact of the second relay (41) is electrically connected to a D pole of the MOS tube (2).

5. A circuit for driving multiple motors to adjust speed according to claim 2 or 3, characterized in that: The second switching circuit (4) comprises a second relay (41), the second ends of the plurality of motors (5) are electrically connected to a moving contact of the second relay (41), a stationary contact of the second relay (41) is electrically connected to a power source, and another stationary contact of the second relay (41) is electrically connected to a D pole of the MOS tube (2).

6. A circuit for driving multiple motors to adjust speeds according to claim 4, characterized in that: The first relay (31) and the second relay (41) are both single-cell relays.

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