Motor energy feedback controller

Abstract

The utility model discloses a motor energy feedback controller, and relates to the technical field of circuit control. The circuit comprises a first voltage detection loop, a second voltage detection loop, a voltage comparison loop and an energy discharge loop, the input end of the first voltage detection loop is electrically connected with a switching power supply, and the input end of the second voltage detection loop is electrically connected with a motor. The output end of the first voltage detection loop and the output end of the second voltage detection loop are electrically connected with the input end of the voltage comparison loop, and the output end of the voltage comparison loop is electrically connected with the input end of the energy discharge loop. The energy discharge circuit can be controlled to discharge excess energy at the motor end through the discharge circuit, so that the purpose of protecting the switching power supply is achieved, and the problem that the switching power supply is shut down due to feedback energy is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit control, and more specifically, relates to a motor energy feedback controller. Background Art

[0002] When a switching power supply drives a load with energy feedback such as a motor, every time energy feedback occurs, it will cause the output voltage of the switching power supply to become higher, resulting in shutdown protection of the switching power supply.

[0003] The existing circuit's method to solve this problem is to increase the capacitance of the switching power supply, but it will cause the switching power supply to be prone to overload protection during startup, increase the power supply volume, and result in a relatively high cost. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a motor energy feedback controller that can overcome or at least partially solve the above problems.

[0005] To solve the above technical problem, the basic concept of the technical solution adopted by the utility model is: a motor energy feedback controller, including a first voltage detection circuit, a second voltage detection circuit, a voltage comparison circuit, and an energy discharge circuit;

[0006] The input end of the first voltage detection circuit is electrically connected to the switching power supply;

[0007] The input end of the second voltage detection circuit is electrically connected to the motor;

[0008] The output ends of the first voltage detection circuit and the second voltage detection circuit are both electrically connected to the input end of the voltage comparison circuit;

[0009] The output end of the voltage comparison circuit is electrically connected to the input end of the energy discharge circuit.

[0010] Preferably, the first voltage detection circuit is used to detect the voltage output by the switching power supply.

[0011] Further, the second voltage detection circuit is used to detect the voltage output by the motor.

[0012] Furthermore, the voltage comparison circuit is used to compare the voltage detected by the first voltage detection circuit with the voltage detected by the second voltage detection circuit, generate a protection signal according to the comparison result, send a control signal to the energy discharge circuit according to the protection signal, and the energy discharge circuit discharges the excess current of the motor.

[0013] Preferably, it further includes an energy check valve circuit, and the input end of the energy check valve circuit is electrically connected to the output end of the voltage comparison circuit.

[0014] Further, the energy check - valve circuit is used to cut off the current generated when the motor brakes or reverses, preventing the current from flowing back to the switching power supply.

[0015] After adopting the above - mentioned technical solution, the utility model has the following beneficial effects compared with the prior art: The motor energy feedback controller of the utility model enables two voltage detection circuits to respectively detect the voltage output by the switching power supply and the voltage at the motor end, and then the voltage comparison circuit conducts voltage comparison. According to the comparison result, the energy discharge circuit is controlled to discharge the excess energy at the motor end through the discharge circuit, thereby achieving the purpose of protecting the switching power supply and solving the problem of the switching power supply shutting down due to the feedback energy.

[0016] The following further describes the specific implementation manners of the utility model in detail with reference to the accompanying drawings. Description of the Drawings

[0017] In the drawings:

[0018] Figure 1 is the overall circuit diagram of the utility model;

[0019] Figure 2 is the circuit diagram of the first voltage detection circuit of the utility model;

[0020] Figure 3 is the circuit diagram of the second voltage detection circuit of the utility model;

[0021] Figure 4 is the circuit diagram of the voltage comparison circuit of the utility model;

[0022] Figure 5 is the circuit diagram of the energy discharge circuit of the utility model;

[0023] Figure 6 is the circuit diagram of the energy check - valve circuit of the utility model;

[0024] Figure 7 is the circuit implementation block diagram of the utility model. Specific Implementation Manner

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0026] Embodiment:

[0027] Referring to Figure 1 as shown, a motor energy feedback controller includes a first voltage detection circuit, a second voltage detection circuit, a voltage comparison circuit, and an energy discharge circuit;

[0028] The input end of the first voltage detection circuit is electrically connected to the switching power supply;

[0029] The input end of the second voltage detection circuit is electrically connected to the motor;

[0030] The output ends of the first voltage detection circuit and the second voltage detection circuit are both electrically connected to the input end of the voltage comparison circuit;

[0031] The output end of the voltage comparison circuit is electrically connected to the input end of the energy discharge circuit.

[0032] The circuit diagram of the first voltage detection circuit is as shown in Figure 2 the figure;

[0033] The circuit diagram of the second voltage detection circuit is as shown in Figure 3 the figure;

[0034] The circuit diagram of the voltage comparison circuit is as shown in Figure 4 the figure;

[0035] The circuit diagram of the energy discharge circuit is as shown in Figure 5 the figure.

[0036] The first voltage detection circuit is used to detect the voltage output by the switching power supply, the second voltage detection circuit is used to detect the voltage output by the motor, the voltage comparison circuit is used to compare the voltage detected by the first voltage detection circuit with the voltage detected by the second voltage detection circuit, generate a protection signal according to the comparison result, send a control signal to the energy discharge circuit according to the protection signal, and the energy discharge circuit discharges the excessive current of the motor.

[0037] It further includes an energy check valve circuit. The input end of the energy check valve circuit is electrically connected to the output end of the voltage comparison circuit. The energy check valve circuit is used to cut off the current generated when the motor brakes or reverses, and prevent the current from flowing back to the switching power supply.

[0038] The circuit diagram of the energy check valve circuit is as shown in Figure 6 the figure.

[0039] The circuit implementation block diagram is as shown in Figure 7 the figure.

[0040] The energy check valve circuit prevents the energy generated when the motor brakes or reverses from flowing back to the switching power supply and damaging the switching power supply.

[0041] The first voltage detection circuit and the second voltage detection circuit are used to detect the voltage output by the switching power supply and the voltage of the motor. The detected voltages are input into a voltage comparison circuit. After comparing the voltages of the two paths, the voltage comparison circuit generates a protection signal through calculation and generates a control signal to be sent to the energy discharge circuit to control the energy discharge circuit, discharging the excess energy at the motor end through the discharge circuit, so as to achieve the purpose of protecting the switching power supply.

[0042] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, according to the technical solution of the present invention and its inventive concept, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. A motor energy feedback controller, characterized in that, It includes a first voltage detection circuit, a second voltage detection circuit, a voltage comparison circuit and an energy discharge circuit; The input end of the first voltage detection circuit is electrically connected to the switching power supply; The input end of the second voltage detection circuit is electrically connected to the motor; The output ends of the first voltage detection circuit and the second voltage detection circuit are both electrically connected to the input end of the voltage comparison circuit; The output end of the voltage comparison circuit is electrically connected to the input end of the energy discharge circuit.

2. The motor energy feedback controller according to claim 1, wherein The first voltage detection circuit is used to detect the voltage output by the switching power supply.

3. The motor energy feedback controller according to claim 2, characterized in that, The second voltage detection circuit is used to detect the voltage output by the motor.

4. The motor energy feedback controller according to claim 3, characterized in that, The voltage comparison circuit is used to compare the voltage detected by the first voltage detection circuit with the voltage detected by the second voltage detection circuit, generate a protection signal according to the comparison result, send a control signal to the energy discharge circuit according to the protection signal, and the energy discharge circuit discharges the excess current of the motor.

5. The motor energy feedback controller according to claim 1, characterized in that, It further includes an energy check circuit, and the input end of the energy check circuit is electrically connected to the output end of the voltage comparison circuit.

6. The motor energy feedback controller according to claim 5, characterized in that, The energy check circuit is used to cut off the current generated when the motor brakes or reverses, and prevent the current from flowing back to the switching power supply.

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