Title:
電気機器のための離散周波数ソフトスタート方法およびその装置
Document Type and Number:
Japanese Patent JP5349304
Kind Code:
B2
Abstract:
The invention relates to a soft starting method and system thereof in the way of wave-skipping with stepped frequency and stepless voltage regulating for a motor which can be applied to the large torque starting of AC motor under the condition of a power supply of a industrial frequency supply source and the safe starting of higher load. Trigger signals generated by a control system, in the soft starting method of the invention, act on five sets of anti-parallel thyristor valves connected between the power supply and the motor to conduct a pair of thyristors thereof according to a set frequency and sequence, and the motor is started from a standstill status to full speed in the way of wave-skipping by controlling the sets of the thyristor valves. The method may improve the starting torque for more than 10 times of the traditional motor soft starting of the voltage reduction and control the starting current for about two times of the rated current. The cost thereof is only 20-25% of similar frequency converter.
More Like This:
Inventors:
Li Xing
Left strong
Xu Ying win
Shigeru
Left strong
Xu Ying win
Shigeru
Application Number:
JP2009521095A
Publication Date:
November 20, 2013
Filing Date:
July 24, 2007
Export Citation:
Assignee:
RONGXIN POWER ELECTRONIC CO.,LTD.
International Classes:
H02P1/28; H02P21/34; H02P27/02; H02P27/18
Domestic Patent References:
| JP10337063A | ||||
| JP62290388A | ||||
| JP58156399U | ||||
| JP44028616B1 | ||||
| JP48092829A | ||||
| JP50043693Y1 |
Attorney, Agent or Firm:
Hajime Tsukuni
Yasuo Yanagibashi
Yasuo Yanagibashi