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Title:
METHOD AND APPARATUS FOR CONTROLLING PHASE SHIFT OF POWER CONVERTER
Document Type and Number:
Japanese Patent JPH07184368
Kind Code:
A
Abstract:

PURPOSE: To provide a method and an apparatus for controlling phase shift which is free from the influence of waveform distortion of power supply and frequency variation.

CONSTITUTION: A phase lag generated by a filter circuit 16 for eliminating distortion of a synchronous voltage signal is created by a phase compensating signal generating circuit 12, the phase lag is subtracted, by means of an adder 17, as a bias value from a firing angle command value α of a semiconductor power control element of the power converter outputted depending on a command from a controller as the host apparatus of a current control circuit 11 and the value ψ (=α- is given as an actual firing angle command value to a pulse phase shifting circuit 15 which generates an ignition pulse.


Inventors:
IIJIMA TAKESHI
AZUSAZAWA NOBORU
Application Number:
JP1993000326703
Publication Date:
July 21, 1995
Filing Date:
December 24, 1993
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
H02M1/08; H02M7/515; (IPC1-7): H02M1/08; H02M7/515
Attorney, Agent or Firm:
Unuma Tatsuyuki