Calculating Overvoltages in Windings of Synchronous Motors with Thyristor Frequency Converters

Analysis of overvoltages on the windings of synchronous motors caused by recharging of the insulation capacitances of motor stator windings connected with switching of valve currents has been carried out. The effect of a connecting cable line on the overvoltages of the motor is demonstrated. Formula...

Full description

Saved in:
Bibliographic Details
Published in:Russian electrical engineering 2020, Vol.91 (1), p.41-48
Main Authors: Shepelin, V. F., Donskoi, N. V., Ivanchina, E. I.
Format: Article
Language:English
Subjects:
Coils (windings)
Engineering
Frequency analysis
Frequency converters
Insulation
Machines
Manufacturing
Mathematical analysis
Motor stators
Overvoltage
Processes
Switching
Synchronous motors
Throttles
Thyristors
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Analysis of overvoltages on the windings of synchronous motors caused by recharging of the insulation capacitances of motor stator windings connected with switching of valve currents has been carried out. The effect of a connecting cable line on the overvoltages of the motor is demonstrated. Formulas for determining the EMF phases of the network and the motor are presented. Expressions for determining bias EMF and zero-sequence EMF are examined. Oscillograms of variations in the current of the motor phases, the output voltage of the rectifier, and the insulation voltage of the motor are presented. Based on an analysis of the calculated quantities, conclusions are drawn and recommendations given for switching on the windings of a smoothing throttle.
ISSN:1068-3712
1934-8010
DOI:10.3103/S1068371220010101