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Intelligent motor driving method for high-voltage circuit breaker

A high-voltage circuit breaker, motor-driven technology, applied in the control of generators, motor-generator control, control of electromechanical transmission devices, etc., can solve problems such as high efficiency, high cost, and large moment-to-inertia ratio.

Inactive Publication Date: 2015-11-04
DORNA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with asynchronous motors, it does not require reactive excitation current, so it has high efficiency, high power factor, large moment-to-inertia ratio, reduced stator current and stator resistance losses, and the rotor parameters can be measured and the control performance is good; but it is different from Compared with asynchronous motors, there are also disadvantages such as high cost and difficult starting.

Method used

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  • Intelligent motor driving method for high-voltage circuit breaker
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  • Intelligent motor driving method for high-voltage circuit breaker

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Embodiment Construction

[0046] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0047] see figure 1 and figure 2 , an intelligent high-voltage circuit breaker motor driving method, comprising the steps of:

[0048] The motor park equation is obtained according to the structure of the motor stator and rotor and the d-q coordinate system:

[0049] Stator winding voltage equation:

[0050] u d = Ri d + dψ d d t - ωψ q - - - ( 3 - 1 )

[0051] u ...

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Abstract

The invention discloses an intelligent motor driving method for a high-voltage circuit breaker. A motor park equation is obtained according to a motor stator and rotor structure and a d-q mathematical model, then under a two-phase static coordinate system alpha-beta coordinate system, a state equation of a surface type permanent magnet synchronous motor when i<alpha>, i<beta>, omega and theta are state variables is selected, torque of the motor can be controlled through control of i<d> and i<q>, and setting is performed according to actual control requirements; and in regard to control of exciting current i<d>, in general, three circumstances exist on in practical application: 1) adopting a control strategy of making i<d> equal to 0, 2) controlling i<d> to pursue maximum torque efficiency, and 3) making i<d> be a negative value to achieve the purpose of flux weakening.

Description

technical field [0001] The invention relates to the field of motor drive, in particular to a motor drive method for an intelligent high-voltage circuit breaker. Background technique [0002] Because the action of the motor operating mechanism is controllable, it provides conditions for operating the circuit breaker with different speed characteristics. The principle of motor direct drive SF6 high voltage circuit breaker is mainly composed of AC power supply, energy storage capacitor, inverter circuit, control circuit and permanent magnet synchronous motor. [0003] The capacitor is the energy storage element in the motor operating mechanism. When the circuit breaker is opened and closed, a large instantaneous current is required. At this time, the energy required by the motor will be provided by the capacitor and will not have a large impact on the power supply; when the capacitor When the voltage drops to a certain value, it is charged by an AC (DC) power supply. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
Inventor 吕春松彭亮易健朱通段伟
Owner DORNA TECH