Method for controlling the phase angle of the output current or

Details Method for controlling the phase angle of the output current or Method for controlling the phase angle of the output current or

1986-07-01

1987-08-18

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363137, H02P 1320

Patent

active

046881638

ABSTRACT:
If the output current or the output voltage of a frequency converter is to occupy a respective predetermined phase angle, the output currents or output voltages defining a respective 60.degree. el sector are switched alternatingly with a corresponding pulse/pause ratio. The period of the latter is chosen so that it is a minimum in the center of each 60.degree. el sector and is a maximum at the edge of each sector. Thereby, minimum pulse times are kept also at the edge of the sectors without excessive decrease of the average frequency for the pulsing.

REFERENCES:
patent: 4366533 (1982-12-01), Kohata et al.
patent: 4367521 (1983-01-01), Kohata et al.
patent: 4609983 (1986-09-01), Braun

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