Frequency converter apparatus

Details Frequency converter apparatus Frequency converter apparatus

1985-08-28

1987-03-24

Salce, Patrick R.

Electric power conversion systems

Frequency conversion without intermediate conversion to d.c.

By semiconductor converter

318808, H02M 5257

Patent

active

046529896

ABSTRACT:
A frequency converter apparatus is provided with a frequency converter coupled to an AC power supply and to a load. The frequency converter converts an AC input with a given input frequency into an AC output with a given output frequency. The frequency converter apparatus is further provided with a frequency reference circuit and a harmonic cancel circuit. The frequency reference circuit supplies a reference signal to the frequency converter so that the output frequency of the AC output follows the reference signal. The harmonic cancel circuit supplies a harmonic cancelling signal to the frequency reference circuit so that the prescribed order of the higher harmonic of the AC output is substantially cancelled according to the frequency, magnitude and phase of the harmonic cancelling signal.

REFERENCES:
patent: 3959719 (1976-05-01), Espelage
patent: 3967173 (1976-06-01), Stich
patent: 4361791 (1982-11-01), Plunkett
patent: 4371920 (1983-02-01), Salzmann
patent: 4555755 (1985-11-01), Kurosawa et al.

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