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Title:
MAGNETIZING POWER SUPPLY
Document Type and Number:
Japanese Patent JP2009060003
Kind Code:
A
Abstract:

To provide a magnetizing power supply capable of ensuring efficient charging, increasing charging speed, and stabilizing voltage after charging even if an input voltage or an input frequency is unstable.

The magnetizing power supply 10 comprises: a charging capacitor 15 for charging magnetizing electrical energy; a rectifying circuit 11 for rectifying alternating current from an alternating-current power supply P; IGBT1 to IGBT4, connected to the rectifying circuit 11, for supplying electrical energy to the charging capacitor 15; a PWM output circuit 23 for transmitting a switching signal to the IGBT1 to IGBT4; a voltage divider 18 and a current detection coil 19 for detecting the charging state of the charging capacitor 15; a memory 22 for storing charging control information on charging by the charging capacitor 15; a CPU 24 for controlling the PWM output circuit 23 based on the charging state detected by the voltage divider 18 and current detection coil 19 and the charging control information stored in the memory 22.


Inventors:
HIRASAWA MASAYUKI
Application Number:
JP2007227568A
Publication Date:
March 19, 2009
Filing Date:
September 03, 2007
Export Citation:
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Assignee:
DMT KK
International Classes:
H01F13/00; H02M3/28
Domestic Patent References:
JP2006230124A2006-08-31
JP2511783B21996-07-03
Attorney, Agent or Firm:
Masayuki Masabayashi
Ryoichi Takaoka
Hayashi Ichiyoshi
Kiyoshi Kato