Title:
DRIVE CONTROLLING METHOD FOR SYNCHRONOUS MOTOR
Document Type and Number:
Japanese Patent JPS5791693
Kind Code:
A
Abstract:
PURPOSE:To ensure a smooth restart of a synchronous motor upon AC power supply recovery by a method wherein an inverter circuit commutator capacitor is kept charged during a momentary power stoppage. CONSTITUTION:A momentary power supply interruption causes a commutation capacitor 22 to discharge, the reduced voltage resulting in a lower inverter commutation withstand capability. An auxiliary thrystor 25 when it is turned on causes the commutation capacitor 22 to be charged by a current flowing through a firt capacitor 7, the thrystor 25, a reactor 26, a commutation capacitor 22, a thrystor 20d, and a reactor 24b. This setup prevents an inverter commutation failure and enables the machine to restart upon recover from a power supply interruption of several seconds.
Inventors:
ICHIOKA TADASHI
IHARA AKIO
IHARA AKIO
Application Number:
JP16621280A
Publication Date:
June 07, 1982
Filing Date:
November 26, 1980
Export Citation:
Assignee:
MEIDENSHA ELECTRIC MFG CO LTD
International Classes:
H02P27/06; H02P25/02; (IPC1-7): H02P7/62
Domestic Patent References:
| JPS5324532A | 1978-03-07 | |||
| JPS54134327A | 1979-10-18 | |||
| JPS50113724A | 1975-09-06 |