Direct current separate excitation motor control circuit

A control circuit and main circuit technology, which is applied in the direction of DC motor speed/torque control, DC motor deceleration device, excitation or armature current control, etc. Insufficient torque and other problems to achieve the effect of solving insufficient starting torque, enhancing timeliness and sensitivity, and increasing reliability

Inactive Publication Date: 2015-10-07
重庆市小榄电器有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a control circuit of a DC separately excited motor to solve the problem that the existing DC separately excited motor control circuit has large voltage fluctuations on the power supply side during the starting and braking process; the starting torque is insufficient, the climbing ability is weak, and the reliability is not good. high problem

Method used

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  • Direct current separate excitation motor control circuit
  • Direct current separate excitation motor control circuit
  • Direct current separate excitation motor control circuit

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but not as a limitation of the present invention.

[0018] The reference signs in the figure are: key switch K, main contactor KM, main contact coil L2, second resistor R2, seventh diode D7, filter capacitor C3, excitation coil L1, armature winding M, first MOSFET tube T1, the second MOSFET T2, the third MOSFET T3, the fourth MOSFET T4, the fifth MOSFET T5, and the sixth MOSFET T6.

[0019] In this embodiment, the voltage of the battery is 48V, and the parameters of the driving motor are: rated power 4KW, rated voltage 48V, rated current 104A, rated speed 2800r / min, F-class insulation, and the rated current is allowed to run for 60min in the intermittent working mode .

[0020] like figure 1 As shown, a control circuit of a DC separately excited motor includes a control circuit and a main circuit. The control circuit includes a dsPIC30F4011 chip, a powe...

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Abstract

The invention discloses a direct current separate excitation motor control circuit which comprises a control circuit and a main circuit. The control circuit comprises a dsPIC30F4011 chip, a power supply module, a main contactor drive module, an overvoltage protection module, an overcurrent protection module, a voltage detection module and a current detection module, wherein the modules are electrically connected. The main circuit board comprises an armature drive module, an excitation drive module and a current sensor which is used for detecting armature current and excitation current. According to the invention, the problems of large power supply side voltage fluctuation, insufficient starting torque, weak climbing ability and poor reliability of the existing direct current separate excitation motor controller in starting and braking processes are solved.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a control circuit of a direct current separately excited motor. Background technique [0002] In DC motors, according to the excitation method, it can be divided into separate excitation, series excitation, compound excitation and permanent magnet. As an important branch of DC motors, separately excited motors are widely used in industrial production. The most notable difference between the DC separately excited motor and other DC motors is that the armature coil and the excitation coil are powered by different power sources. It is precisely because of this excitation form that it has superior speed regulation performance and mechanical characteristics. [0003] However, the control circuit of the current DC separately excited motor is either simple in structure and unable to give full play to its speed regulation performance and mechanical performance, or the structure is very compl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/29H02P7/282H02P3/08
Inventor 沈春蓝
Owner 重庆市小榄电器有限公司
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