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DC (direct current) motor driver

A DC motor and drive technology, applied in the direction of DC motor speed/torque control, electrical components, emergency protection circuit devices, etc., can solve problems such as interference, achieve large starting torque, perfect protection function, and reliable operation

Inactive Publication Date: 2011-06-15
CHONGQING HUAYU HEAVY IND ELECTROMECHANICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the single-chip microcomputer control technology is generally used, but the environment in which the driver is located is harsh, and various interferences are serious. The single-chip microcomputer control can no longer meet the control requirements. In view of this, it is necessary to design a DC motor driver with excellent performance and used for the pitch control system.

Method used

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  • DC (direct current) motor driver

Examples

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Referring to Figure 1, a DC motor driver includes a three-phase rectifier 1, which is connected to a three-phase AC power supply and rectifies the input three-phase AC power, and the output DC power is filtered by a filter and then sent to the bus , drive the DC motor to work through the drive circuit 3, and also include an encoder, which receives the rotational speed signal of the DC motor M, and sends the rotational speed signal to the drive control circuit 5, and the drive control circuit 5 also receives the enabling of the external input Signal and set speed signal, input enable signal and set speed signal to drive control circuit 5 through external equipment, drive control circuit 5 outputs control signal to drive circuit 3 after processing the input signal, and drive circuit 3 according to demand Control the rotation dire...

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Abstract

The invention discloses a DC (direct current) motor driver which is designed by using a full-analog electronic circuit, a PWM (pulse width modulation) pulse width control chip and a high voltage driving chip. The motor is precisely controlled by using a DC bus protection circuit, a rotary speed feedback and current feedback dual closed-loop PI (Proportional Integral) adjusting circuit, a DC motor back discharging controllable circuit and a pulse width limit controlling circuit. The invention has the following obvious effects: the DC motor driver is reliable in operation, fast in speed regulation response, and strong in anti-interference performance; the motor is exactly controlled by using current feedback dual closed-loop PI adjusting circuit, DC motor back discharging and pulse width limit controlling; and the DC motor driver is perfect in protection function, suitable for a wind power variable paddle system, large in starting torque and is frequently adjusted.

Description

technical field [0001] The invention relates to a pitch drive device in the field of wind power generation, in particular to a DC motor driver for driving a DC motor. [0002] Background technique [0003] As a fast-growing clean energy, wind energy has broad prospects for development. The pitch control system is an important part of the wind power system. It is mainly used to control the automatic adjustment of the blade pitch angle with the wind speed. The motor drive is one of the important components in the pitch control system. The motor drive requires the drive The power is high, the speed regulation response should be fast, the speed regulation should be stable and accurate; in addition, the environment of the wind farm is very harsh, and the interference between the system equipment is very large, which requires the driver to be able to control accurately. At present, the single-chip microcomputer control technology is generally used, but the environment in which t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/00H02P7/29H02H7/085H02H7/08H02H7/22
Inventor 唐胜胡小华邱明伯廖德荣
Owner CHONGQING HUAYU HEAVY IND ELECTROMECHANICAL CO LTD
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