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Brushless direct-current generator excitation circuit

A technology of DC generator and excitation circuit, which is applied to control the direction of the generator through the change of the magnetic field. It can solve the problems of increasing the dynamic transition time, the transient characteristics do not meet the requirements, and the excitation current drops slowly, so as to reduce the transient voltage, The effect of shortening the dynamic transition time

Inactive Publication Date: 2015-01-07
BEIJING SHUGUANG AERO ELECTRICAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are: the dynamic transition time is long, the transient voltage is too large, and the transient characteristics do not meet the requirements
because figure 1 The circuit shown is only freewheeling through the freewheeling diode, and the excitation current drops slowly, which increases the dynamic transition time, resulting in excessive transient voltage and long recovery time, and the transient characteristics meet the requirements

Method used

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  • Brushless direct-current generator excitation circuit
  • Brushless direct-current generator excitation circuit
  • Brushless direct-current generator excitation circuit

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Embodiment Construction

[0010] Below the present invention is described in further detail, see figure 2 , 3 , a brushless DC generator excitation circuit, including an excitation winding L, a first freewheeling diode D1 and an excitation MOS transistor Q1, the second end of the excitation winding L is connected to the drain of the excitation MOS transistor Q1, and the excitation MOS transistor Q1 The source is grounded, the negative pole of the first freewheeling diode D1 is connected to the first end of the excitation winding L, and the gate of the excitation MOS transistor Q1 is connected to the output end of the excitation MOS transistor control signal PMW1 of the DC generator voltage regulating circuit; it is characterized in that : There is a turn-off circuit composed of a reverse magnetic MOS transistor Q2, a second freewheeling diode D2 and a reverse magnetic MOS tube control circuit 1; the drain of the reverse magnetic MOS transistor Q2 and the negative pole of the second freewheeling diode ...

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Abstract

The invention belongs to a generator controller design technology and relates to improvement on a brushless direct-current generator excitation circuit. The brushless direct-current generator excitation circuit comprises an excitation winding L, a first fly-wheel diode D1 and an excitation MOS tube Q1 and is characterized by being provided with a switching-off circuit consisting of an excitation MOS tube Q2, a second fly-wheel diode D2 and an excitation MOS tube control circuit (1). By means of the brushless direct-current generator excitation circuit, dynamic transition time is greatly shortened, transient voltage is decreased, and the circuit ensures that a transient characteristic meets the requirement.

Description

technical field [0001] The invention belongs to the design technology of a generator controller, and relates to the improvement of the exciting circuit of a brushless DC generator. Background technique [0002] Since the transient characteristic is an important index to measure the power generation quality of the DC power generation system, a certain type of brushless DC generator requires: under all working environments, namely the minimum speed, normal speed and maximum speed, and under all loads, that is, from 10% of the rated When the load increases to 85% of the rated load and then decreases to 10% of the rated load and increases from 20% of the rated load to 120% of the rated load and then decreases to 20% of the rated load, the transient and steady-state voltage should be greater than or equal to 22V and less than 50V , the recovery time is less than or equal to 50ms. The excitation circuit of the brushless DC generator can be found in figure 1 , which consists of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/30
CPCH02P9/30
Inventor 刘伟帅韩龙赵雅周朱虹铃
Owner BEIJING SHUGUANG AERO ELECTRICAL
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