Dual-rail controlled motor power supply circuit

Abstract

The utility model discloses a kind of dual-line control type motor power supply circuit, comprising: power supply, main power supply module, first control circuit module, second control circuit module and control module;Main power supply module includes: first control switch unit, second control switch unit and first resistance value voltage division unit, power supply first output end is connected to the first resistance value voltage division unit first end by first control switch unit, first resistance value voltage division unit first end is connected to the positive electrode end of motor to be powered, first resistance value voltage division unit second end ground connection, first resistance value voltage division unit is parallelly connected with second control switch unit;The control end of first control switch unit is connected to the output end of first control circuit module, and the control end of first control circuit module is connected to the first output end of control module.The dual-line control type motor power supply circuit solves the problem that when one line has been controlled to supply power to the motor in the prior art, the other line cannot make the motor power off.

Description

Technical Field

[0001] This utility model relates to motor power supply circuits, specifically to a dual-circuit control type motor power supply circuit. Background Technology

[0002] Chinese patent discloses a DC brushed motor drive circuit with application number CN202022961753.2. The DC brushed motor drive circuit includes: a motor drive circuit, a current signal processing circuit, an AC component module, a DC component module, and a speed pulse generation circuit. The motor drive circuit is connected to the current signal processing circuit, the current signal processing circuit is connected to the AC component module and the DC component module, and the AC component module is connected to the speed pulse generation circuit.

[0003] Although the DC brushed motor drive circuit can ensure that the motor is powered only under control, it still has the following drawbacks: the controller can only control whether the motor is powered on through one line of the motor drive circuit. When one line is already powering the motor, it is impossible to cut off the power to the motor through the other line, resulting in an inflexible way to control the motor's operation. Utility Model Content

[0004] This utility model provides a dual-line control motor power supply circuit to solve the problem in the prior art that when one line is already supplying power to the motor, the other line cannot be used to cut off the power to the motor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model discloses a dual-circuit controlled motor power supply circuit, including: a power supply, a main power supply module, a first control circuit module, a second control circuit module, and a control module; the main power supply module includes: a first control switch unit, a second control switch unit, and a first resistance voltage divider unit; the first output terminal of the power supply is connected to the first terminal of the first resistance voltage divider unit through the first control switch unit; the first terminal of the first resistance voltage divider unit is connected to the positive terminal of the motor to be powered; the second terminal of the first resistance voltage divider unit is grounded; the first resistance voltage divider unit and the second control switch unit are connected in parallel; the control terminal of the first control switch unit is connected to the output terminal of the first control circuit module; the control terminal of the first control circuit module is connected to the first output terminal of the control module; the control terminal of the second control switch unit is connected to the output terminal of the second control circuit module; the control terminal of the second control circuit module is connected to the second output terminal of the control module.

[0007] Preferably, both the first control circuit module and the second control circuit module include: a dual-switch control unit and a controllable switch power supply unit. The second output terminal of the power supply unit supplies power to the power supply control terminal of the controllable switch power supply unit through the dual-switch control unit. The output terminal of the controllable switch power supply unit is connected to the control terminal of the first control switch unit or the control terminal of the second control switch unit. The control terminal of the dual-switch control unit is the control terminal of the first control circuit module or the control terminal of the second control circuit module.

[0008] Preferably, the high-voltage end of the controllable switch power supply unit is the output end, the low-voltage end of the controllable switch power supply unit in the first control circuit module is connected to the first end of the first resistance voltage divider unit, the high-voltage end of the first control switch unit is connected to the first output end of the power supply, and the low-voltage end of the first control switch unit is connected to the first end of the first resistance voltage divider unit through the second resistance voltage divider unit.

[0009] Preferably, the first control circuit module further includes a current limiting unit, the second output terminal of the power supply is connected to the input terminal of the current limiting unit, and the output terminal of the current limiting unit supplies power to the power control terminal of the controllable switch type power supply unit through the dual-switch control unit.

[0010] Preferably, the first control circuit module further includes: a voltage regulator unit, the high-voltage end of which is connected to the output end of the current limiting unit, and the low-voltage end of which is connected to the low-voltage end of the controllable switch power supply unit in the first control circuit module.

[0011] Preferably, the dual-switch control unit includes: an NPN transistor Q1, a PNP transistor Q2, a resistor R1, and a resistor R2. The emitter of the NPN transistor Q1 is connected to the first terminal of the resistor R1, the second terminal of the resistor R1 is the control terminal of the dual-switch control unit, the base of the NPN transistor Q1 is connected to the third output terminal of the power supply, the collector of the NPN transistor Q1 is connected to the first terminal of the resistor R2, the resistor R2 is connected to the emitter of the PNP transistor Q2, the emitter of the PNP transistor Q2 is used to connect to the second output terminal of the power supply, and the collector of the PNP transistor Q2 is used to connect to the power supply control terminal of the controllable switch power supply unit.

[0012] Preferably, the controllable switch power supply section includes: diode D1, resistor R3, resistor R4, capacitor C1, and PNP transistor Q3. The anode of diode D1 is connected to the base of PNP transistor Q3 and the first terminal of resistor R3. The base of PNP transistor Q3 is the power supply control terminal of the controllable switch power supply section. The cathode of diode D1 is connected to the first terminal of resistor R4. The second terminal of resistor R4 is connected to the emitter of PNP transistor Q3 and the positive terminal of capacitor C1. The emitter of PNP transistor Q3 is the high-voltage terminal of the controllable switch power supply section. The collector of PNP transistor Q3 is connected to the second terminal of resistor R3 and the negative terminal of capacitor C1. The collector of PNP transistor Q3 is the high-voltage terminal and the low-voltage terminal of the controllable switch power supply section.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The motor to be powered is a DC motor, and its negative terminal is already grounded. Once voltage is applied to the positive terminal of the motor, its operation can be controlled. This application adds a second control switch unit and a second control circuit module. When the first control circuit module controls the first control switch unit to close, the motor is normally powered and operates normally. At this time, not only can the first control circuit module open the first control switch unit to stop the motor, but the second control circuit module can also close the second control switch unit, short-circuiting the first resistance voltage divider unit and directly grounding the positive terminal of the motor. This allows both circuits (i.e., the first control circuit module and the second control module) to disable the motor, improving control flexibility.

[0015] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0016] Figure 1 Circuit diagram for a dual-circuit controlled motor power supply circuit.

[0017] Figure 2 for Figure 1 Circuit diagram of the second control circuit module. Detailed Implementation

[0018] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] like Figure 1 as well as Figure 2As shown, this utility model discloses a dual-circuit controlled motor power supply circuit, including: a power supply, a main power supply module, a first control circuit module, a second control circuit module, and a control module; the main power supply module includes: a first control switch unit, a second control switch unit, and a first resistance voltage divider unit. The first output terminal of the power supply is connected to the first terminal of the first resistance voltage divider unit through the first control switch unit. The first terminal of the first resistance voltage divider unit is connected to the positive terminal of the motor to be powered. The second terminal of the first resistance voltage divider unit is grounded. The first resistance voltage divider unit and the second control switch unit are connected in parallel; the control terminal of the first control switch unit is connected to the output terminal of the first control circuit module, the control terminal of the first control circuit module is connected to the first output terminal of the control module, the control terminal of the second control switch unit is connected to the output terminal of the second control circuit module, and the control terminal of the second control circuit module is connected to the second output terminal of the control module.

[0020] In this application, the control module is constructed using an STM32 main control chip and has control functions.

[0021] Preferably, both the first and second control circuit modules include a dual-switch control unit and a controllable switch power supply unit. The second output terminal of the power supply provides power to the power control terminal of the controllable switch power supply unit via the dual-switch control unit. The output terminal of the controllable switch power supply unit is connected to the control terminal of the first or second control switch unit. The control terminal of the dual-switch control unit is the control terminal of the first or second control circuit module. The dual-switch control unit provides power to the power control terminal of the controllable switch power supply unit and can control whether or not power is supplied to the power control terminal of the controllable switch power supply unit under the control of the control module. The output terminal of the controllable switch power supply unit provides a high or low level to the control terminal of the first or second control switch unit.

[0022] Preferably, the high-voltage terminal of the controllable switch power supply is the output terminal. The low-voltage terminal of the controllable switch power supply in the first control circuit module is connected to the first terminal of the first resistance voltage divider unit. The high-voltage terminal of the first control switch unit is connected to the first output terminal of the power supply. The low-voltage terminal of the first control switch unit is connected to the first terminal of the first resistance voltage divider unit through the second resistance voltage divider unit. The low-voltage terminal of the controllable switch power supply in the second control circuit module is grounded. This allows the first terminal of the first resistance voltage divider unit to provide low voltage to the low-voltage terminal of the controllable switch power supply in the first control circuit module.

[0023] Preferably, the first control circuit module further includes a current limiting unit, wherein the second output terminal of the power supply is connected to the input terminal of the current limiting unit, and the output terminal of the current limiting unit supplies power to the controllable switch-type power supply unit via the dual-switch control unit. The current limiting unit restricts the current from flowing only from the second output terminal of the power supply to the dual-switch control unit.

[0024] Preferably, the first control circuit module further includes a voltage regulator unit, the high-voltage terminal of which is connected to the output terminal of the current limiting unit, and the low-voltage terminal of which is connected to the low-voltage terminal of the controllable switch-type power supply unit in the first control circuit module. The voltage regulator unit stabilizes the output voltage of the second output terminal of the power supply.

[0025] In this application, the dual-switch control unit includes: an NPN transistor Q1, a PNP transistor Q2, a resistor R1, and a resistor R2. The emitter of the NPN transistor Q1 is connected to the first terminal of the resistor R1, the second terminal of the resistor R1 is the control terminal of the dual-switch control unit, the base of the NPN transistor Q1 is connected to the third output terminal of the power supply, the collector of the NPN transistor Q1 is connected to the first terminal of the resistor R2, the resistor R2 is connected to the emitter of the PNP transistor Q2, the emitter of the PNP transistor Q2 is used to connect to the second output terminal of the power supply, and the collector of the PNP transistor Q2 is used to connect to the power supply control terminal of the controllable switch power supply unit.

[0026] In this application, the controllable switch power supply section includes: diode D1, resistor R3, resistor R4, capacitor C1, and PNP transistor Q3. The anode of diode D1 is connected to the base of PNP transistor Q3 and the first terminal of resistor R3. The base of PNP transistor Q3 is the power supply control terminal of the controllable switch power supply section. The cathode of diode D1 is connected to the first terminal of resistor R4. The second terminal of resistor R4 is connected to the emitter of PNP transistor Q3 and the positive terminal of capacitor C1. The emitter of PNP transistor Q3 is the high-voltage terminal of the controllable switch power supply section. The collector of PNP transistor Q3 is connected to the second terminal of resistor R3 and the negative terminal of capacitor C1. The collector of PNP transistor Q3 is both the high-voltage terminal and the low-voltage terminal of the controllable switch power supply section.

[0027] The first output terminal VCC1 of the power supply outputs 48V, the second output terminal VCC2 outputs 5V, and the third output terminal VCC3 outputs 1.5V.

[0028] The working steps are as follows: When the second terminal of resistor R1 is not connected to a high level, the base of PNP transistor Q2 is unused, and the base of PNP transistor Q2 is equivalent to being connected to a high level. PNP transistor Q2 is disconnected. At this time, the base of PNP transistor Q3 is grounded through resistor R3 and the first voltage divider unit, and the base of PNP transistor Q3 is at a low level. At this time, PNP transistor Q3 is closed. At this time, the control terminal of the first controllable switch unit or the control terminal of the second controllable switch unit is grounded through PNP transistor Q3. At this time, the first controllable switch unit is disconnected and the second controllable switch unit is disconnected. When power is needed for the motor to be powered, the second control circuit module does not operate, and the first control circuit module operates as follows: the second terminal of resistor R1 is connected to a high level. At this time, NPN transistor Q1 is connected to 0V through resistor R1, the base of PNP transistor Q2 is grounded, and PNP transistor Q2 is closed. At this time, the base of PNP transistor Q3 is connected to a high level, and the current at the collector of PNP transistor Q2 flows to the emitter of PNP transistor Q3 through diode D1. The emitter of PNP transistor Q3 provides a high level to the control terminal of the first controllable switch unit. At this time, the first controllable switch unit is closed, realizing the power supply to the motor to be powered. Diode D1 has a current limiting function.

[0029] The first voltage divider unit includes resistor R11, and the second voltage divider unit includes resistor R12. The first controllable switch unit is NMOS transistor Q5 (the gate of NMOS transistor Q5 is the control terminal of the first controllable switch unit, the drain of NMOS transistor Q5 is the high-voltage terminal of the first controllable switch unit, and the source of NMOS transistor Q5 is the low-voltage terminal of the first controllable switch unit). The second controllable switch unit is NMOS transistor Q4. The current limiting section includes diode D2, with the anode of diode D2 being the input terminal of the current limiting section and the cathode of diode D2 being the output terminal of the current limiting section. The voltage regulating unit includes capacitor C3 and resistor R10. The positive terminal of capacitor C3 is connected to the first terminal of resistor R10, which is the high-voltage terminal of the voltage regulating unit. The negative terminal of capacitor C3 is connected to the second terminal of resistor R10, which is the low-voltage terminal of the voltage regulating unit.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dual-circuit controlled motor power supply circuit, characterized in that, include: Power supply, main power supply module, first control circuit module, second control circuit module and control module; The main power supply module includes: a first control switch unit, a second control switch unit, and a first resistance voltage divider unit. The first output terminal of the power supply is connected to the first terminal of the first resistance voltage divider unit through the first control switch unit. The first terminal of the first resistance voltage divider unit is connected to the positive terminal of the motor to be powered. The second terminal of the first resistance voltage divider unit is grounded. The first resistance voltage divider unit is connected in parallel with the second control switch unit. The control terminal of the first control switch unit is connected to the output terminal of the first control circuit module, the control terminal of the first control circuit module is connected to the first output terminal of the control module, the control terminal of the second control switch unit is connected to the output terminal of the second control circuit module, and the control terminal of the second control circuit module is connected to the second output terminal of the control module.

2. The dual-circuit controlled motor power supply circuit according to claim 1, characterized in that, Both the first control circuit module and the second control circuit module include: a dual-switch control unit and a controllable switch power supply unit. The second output terminal of the power supply unit supplies power to the power control terminal of the controllable switch power supply unit through the dual-switch control unit. The output terminal of the controllable switch power supply unit is connected to the control terminal of the first control switch unit or the control terminal of the second control switch unit. The control terminal of the dual-switch control unit is the control terminal of the first control circuit module or the control terminal of the second control circuit module.

3. The dual-circuit controlled motor power supply circuit according to claim 2, characterized in that, The high-voltage end of the controllable switch power supply unit is the output end. The low-voltage end of the controllable switch power supply unit in the first control circuit module is connected to the first end of the first resistance voltage divider unit. The high-voltage end of the first control switch unit is connected to the first output end of the power supply. The low-voltage end of the first control switch unit is connected to the first end of the first resistance voltage divider unit through the second resistance voltage divider unit.

4. The dual-circuit control motor power supply circuit according to claim 3, characterized in that, The first control circuit module also includes a current limiting unit, with the second output terminal of the power supply connected to the input terminal of the current limiting unit, and the output terminal of the current limiting unit supplying power to the power control terminal of the controllable switch type power supply unit through the dual-switch control unit.

5. The dual-circuit controlled motor power supply circuit according to claim 4, characterized in that, The first control circuit module also includes a voltage regulator unit, the high-voltage end of which is connected to the output end of the current limiting unit, and the low-voltage end of which is connected to the low-voltage end of the controllable switch power supply unit in the first control circuit module.

6. The dual-circuit controlled motor power supply circuit according to claim 5, characterized in that, The dual-switch control unit includes: an NPN transistor Q1, a PNP transistor Q2, a resistor R1, and a resistor R2. The emitter of the NPN transistor Q1 is connected to the first terminal of the resistor R1, and the second terminal of the resistor R1 is the control terminal of the dual-switch control unit. The base of the NPN transistor Q1 is connected to the third output terminal of the power supply. The collector of the NPN transistor Q1 is connected to the first terminal of the resistor R2, and the resistor R2 is connected to the emitter of the PNP transistor Q2. The emitter of the PNP transistor Q2 is used to connect to the second output terminal of the power supply, and the collector of the PNP transistor Q2 is used to connect to the power supply control terminal of the controllable switch power supply unit.

7. The dual-circuit controlled motor power supply circuit according to claim 6, characterized in that, The controllable switch power supply unit includes: diode D1, resistor R3, resistor R4, capacitor C1, and PNP transistor Q3. The anode of diode D1 is connected to the base of PNP transistor Q3 and the first terminal of resistor R3. The base of PNP transistor Q3 is the power supply control terminal of the controllable switch power supply unit. The cathode of diode D1 is connected to the first terminal of resistor R4. The second terminal of resistor R4 is connected to the emitter of PNP transistor Q3 and the positive terminal of capacitor C1. The emitter of PNP transistor Q3 is the high-voltage terminal of the controllable switch power supply unit. The collector of PNP transistor Q3 is connected to the second terminal of resistor R3 and the negative terminal of capacitor C1. The collector of PNP transistor Q3 is the high-voltage terminal and the low-voltage terminal of the controllable switch power supply unit.

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