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An operating mechanism and control method for a permanent magnet salient pole motor of a high voltage circuit breaker

A technology for high-voltage circuit breakers and salient pole motors, applied in high-voltage air circuit breakers, AC motor control, high-voltage/high-current switches, etc., can solve problems such as inability to operate at full speed, unsatisfactory dynamic control characteristics, and inaccurate tracking , to achieve the effect of improving the level of intelligent operation, improving the robustness and follow-up control characteristics, and improving the control effect

Active Publication Date: 2015-12-09
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional operating mechanism cannot accurately track the expected action curve of the given circuit breaker, nor can it control the speed of the entire operation process, resulting in unsatisfactory dynamic control characteristics, and it is difficult to meet the requirements of the modern power system for intelligent operation of the circuit breaker

Method used

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  • An operating mechanism and control method for a permanent magnet salient pole motor of a high voltage circuit breaker
  • An operating mechanism and control method for a permanent magnet salient pole motor of a high voltage circuit breaker
  • An operating mechanism and control method for a permanent magnet salient pole motor of a high voltage circuit breaker

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Embodiment Construction

[0044] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0045] In this embodiment, the 126kV vacuum circuit breaker is taken as an example. According to the requirements of the arc extinguishing chamber for the operating mechanism, the permanent magnet salient pole motor operating mechanism of the high-voltage circuit breaker is used, such asfigure 1 shown. The operating mechanism is set at the side phase position of the circuit breaker, and is mainly composed of a driving motor 1, a motor controller 2 and a photoelectric encoder 3. In this embodiment, a motor is used to directly drive the transmission mechanism to realize the three-phase mechanical linkage of the circuit breaker.

[0046] The output spindle of the drive motor 1 is connected to the rotating spindle 5 through the docking flange 4, and one end of the three transmission cranks 6 is keyed to the transmission spindle 5, realizing the mec...

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Abstract

The invention provides a high-voltage breaker permanent magnet salient pole motor operation mechanism and a control method, and belongs to the filed of high-voltage switch equipment operation techniques. A drive motor of the operation mechanism drives a salient pole rotor to rotate by means of an electromagnetic torque produced by the drive motor itself and drives the switch-on and switch-off operations of a breaker. Currents are exerted in a single-phase armature winding, a magnetic field produced by a permanent magnet drives the salient pole rotor to rotate under the action of the electromagnetic force. According to the control method, firstly, a charging capacitor bank of the drive motor is charged, a speed weight coefficient and a current weight coefficient are set, and according to the collected armature current and rotation speed signals of the drive motor, the duty ratio and the frequency of a PWM signal is adjusted by means of a weight fuzzy PID algorithm. The drive motor does not need a phase change phase of a traditional permanent magnetic brushless direct-current motor within a work angle, energy consumption of the drive motor is reduced, efficiency of the drive motor can be obviously improved on the working condition that the high-voltage breaker works for a short time period, the non-equilibrium state process of motor phase change is avoided, and the control effect when the drive motor works for a short time period can be obviously improved.

Description

technical field [0001] The invention belongs to the operating technology in the field of high-voltage switchgear, and in particular relates to an operating mechanism and a control method for a permanent magnet salient pole motor of a high-voltage circuit breaker. Background technique [0002] High-voltage circuit breaker is one of the most important and complex equipment in the power system. Whether it can normally realize fast opening and closing operations plays a decisive role in the safe and stable operation of the power grid. The traditional circuit breaker operating mechanism has complex structure, many moving parts, poor controllability and reliability. The complex operating mechanism leads to long response time and large dispersion of the operating mechanism, and its structure cannot fully meet the kinematic and operating characteristics of the circuit breaker. With the improvement of the intelligent level of high-voltage circuit breakers, intelligent equipment has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/36H02P23/00
Inventor 林莘李昊旻史可鉴王飞鸣吴冠男杨艳辉徐建源
Owner SHENYANG POLYTECHNIC UNIV
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