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Pitch-variable system with arc-extinguishing device

An arc extinguishing device and variable pitch technology, applied in the field of variable pitch systems, can solve the problems of increased fan damage, breakdown, increased possibility of brake failure, etc., and achieve the effect of prolonging the service life

Inactive Publication Date: 2010-09-15
SUZHOU NENGJIAN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

As we all know, when the impulse voltage is too large, it is easy to break down the contacts of the DC contactor, or damage the coil of the motor brake pad, which greatly increases the possibility of failure of the brake, and also increases the possibility of damage to the fan. sex

Method used

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  • Pitch-variable system with arc-extinguishing device
  • Pitch-variable system with arc-extinguishing device

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Embodiment Construction

[0012] The invention discloses a pitch control system with an arc extinguishing device, such as figure 1 As shown, it includes a motor brake pad 2 connected to a DC power supply 1. The motor brake pad 2 is a part of the motor, mainly composed of a brake pad coil, a magnet disposed in the coil, and a brake bar connected by a spring. The brake pad coil is connected to the DC power supply 1 .

[0013] In the DC power supply circuit, an arc extinguishing device is connected in parallel with the coil of the motor brake pad 2 . In this embodiment, the arc extinguishing device is an RC resistance-capacitance absorption circuit 3 . Further, the RC absorbing circuit includes two capacitors connected in parallel and a resistor 4 connected in series. This RC resistance-capacitance absorption circuit 3 can absorb a part of the voltage at the moment of current conduction, so that the induced shock voltage generated by the motor during the switching process of the brake release and the br...

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Abstract

The invention discloses a pitch-variable system with arc-extinguishing device, comprising: a motor brake pad connected on a direct current (DC) power supply. In a DC power circuit, an arc-extinguishing device is connected with the motor brake pad in parallel, and the arc-extinguishing device is a RC ( Resistance-Capacitance) absorbing circuit. The invention has the advantages that the arc-extinguishing device is additionally arranged in the pitch system, thereby the induction impulse voltage generated in the switch process of releasing or braking can be limited to a certain range, and service lives of the motor brake pad and the contact of the DC power contactor are prolonged.

Description

technical field [0001] The invention relates to a wind power generating equipment, in particular to a pitch variable system with an arc extinguishing device. Background technique [0002] As non-renewable energy is facing the dilemma of depletion worldwide, in order to meet the needs of industrial production and human life, people's attention and utilization of renewable energy such as solar energy, wind power, and hydropower have been increasing day by day. Among them, wind power generation is a relatively mature energy development technology, especially in areas such as plateaus and coastal areas, which are widely used. [0003] At present, in the variable pitch system of wind power generation, after the blades of the fan are rotated to a predetermined position, the operation method of fixing the blades at this position is generally realized by controlling the brake pads of the motor to lock the brakes. When the motor brake pad is connected to the DC voltage, the brake is...

Claims

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Application Information

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IPC IPC(8): F03D7/00H02H9/08
CPCY02E10/723Y02E10/72
Inventor 傅建民王政
Owner SUZHOU NENGJIAN ELECTRIC
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