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Driving system of direct current motor

A DC motor and drive circuit technology, applied in the direction of electrical components, emergency protection circuit devices, excitation or armature current control, etc., can solve the problems of high cost, low power, increase the output power of the servo system, etc., to achieve accurate and reliable control, Effect of increasing output power and reducing cost

Pending Publication Date: 2017-10-17
上海堃捷信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the servo motor is limited by the process, it is difficult to achieve high power output
[0004] Therefore, the current servo system using ser

Method used

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  • Driving system of direct current motor
  • Driving system of direct current motor
  • Driving system of direct current motor

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0056] Example one

[0057] figure 1 It is a schematic diagram of the structure of the driving system of the DC motor provided in the first embodiment of the present invention. This embodiment is suitable for driving an electric cylinder system and specifically includes the following parts:

[0058] DC motor 10;

[0059] The rotation speed detection circuit 50 is connected to the DC motor 10 through the encoder 20, and is used to detect the actual rotation speed of the DC motor 10 to obtain a rotation speed signal of the DC motor 10;

[0060] The current detection circuit 60 is electrically connected to the DC motor 10, and is used to detect the actual current of the DC motor 10 to obtain the current electrical signal of the DC motor 10;

[0061] The position detection circuit 40 is used to detect the position of the limit protection component 30 of the DC motor 10 to obtain a position signal, and the limit protection component 30 is mechanically connected to the motor shaft of the DC m...

Example Embodiment

[0069] Example two

[0070] On the basis of the foregoing embodiments, the drive system of the DC motor further includes:

[0071] The current protection module is used for when the current electrical signal is greater than the current setting value, the drive circuit controls the DC motor to stop running, and outputs a first error signal to the processor.

[0072] The temperature protection module is configured to, when it is detected that the temperature of the driving circuit is higher than the temperature setting value, the driving circuit controls the DC motor to stop running, and outputs a second error signal to the processor.

[0073] On the basis of the above technical solutions, the drive circuit includes an H-bridge circuit, which allows a large current to drive the DC motor, and has a small internal resistance, which can effectively reduce the heating of the drive circuit board and realize the stable and effective operation of the DC motor.

[0074] Specifically, to figure 2...

Example Embodiment

[0084] Example three

[0085] Figure 4A~Figure 4C It is a photoelectric isolation circuit diagram of the drive system of the DC motor in the third embodiment of the present invention. On the basis of the foregoing embodiments, the drive system of the DC motor further includes a photoelectric isolation circuit. The processor is connected to the rotation speed detection circuit, the position detection circuit and / or the drive circuit through the photoelectric isolation circuit.

[0086] Such as Figure 4A As shown, the photoelectric isolation circuit includes a first photoelectric coupling chip U2;

[0087] The signal input pin 3 of the first photoelectric coupling chip U2 is electrically connected to the first rotational speed signal HEDS_A;

[0088] The signal output pin 5 of the first photoelectric coupling chip U2 is electrically connected to the processor;

[0089] The first reference voltage input pin 1 of the first photoelectric coupling chip U2 is electrically connected to the f...

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Abstract

The invention discloses a driving system of a direct current motor. The driving system comprises a direct current motor; a rotating speed detection circuit, which is used to acquire the rotating speed signal of the direct current motor; a current detection circuit, which is used to acquire the current electric signal of the direct current motor; a position detection circuit, which is used to acquire a position signal; a processor, which is used to generate and output a pulse width modulation signal according to the control information of the direct current motor, the rotating speed signal, the current electric signal, and the position signal; a driving circuit, which is used to control switching-on/off of a switch device according to the pulse width modulation signal, and is used to control the operation state of the direct current motor. The direct current motor having low costs is used for a servo control system, and the semi-closed loop driving way of the conventional direct current motor is abandoned, and a full-closed loop driving way having better control precision is adopted, and therefore objects of adopting the direct current motor in the servo system to reduce the costs of the servo system, increase the output power of the servo system, and realize the accurate and reliable control over the direct current are realized.

Description

technical field [0001] Embodiments of the present invention relate to motor drive technology, and in particular to a drive system for a DC motor. Background technique [0002] In the field of mechanical control, such as precision machine tools, automobile manufacturing equipment and robots, servo systems are used to accurately follow or reproduce the mechanical movement process, such as to make the output mechanical displacement accurately track the input displacement. [0003] Most existing servo systems use servo motors to control the movement of mechanical components. Servo motors are precision motors with the characteristics of small electromechanical time constant, high linearity, smooth rotation and stable torque. Therefore, the servo motor is used as an actuator in the servo system, which can accurately control the speed and position of the mechanical components. However, since the servo motor is a precision motor, the requirements for its material, structure and pr...

Claims

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Application Information

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IPC IPC(8): H02P7/29H02H7/08H02H7/085
CPCH02H7/0811H02H7/085H02P7/29
Inventor 朱海兵贺琳
Owner 上海堃捷信息科技有限公司
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