Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1986-08-04
1987-09-15
Salce, Patrick R.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
363 71, H02M 1100
Patent
active
046943889
ABSTRACT:
Apparatus for synchronizing the oscillators of several clocked direct voltage converters where each direct voltage converter has a control circuit with the oscillator as an integrated component and each control circuit has a connection for a capacitor and a connection for a resistor for defining the oscillator frequency. Commercial elements TDA 4714 and TDA 4716 are preferred as the control circuit. The synchronization is attained by adjusting the frequency of the oscillator of a first direct voltage converter to be higher than the frequency of the oscillators of the remaining direct voltage converters. A pulse sequence with an impulse frequency proportional to the oscillator frequency of the first direct voltage converter is transmitted by the first direct voltage converter to all of the other converters through an element that provides isolation between the different potentials. The pulses of the pulse sequence adjust a predetermined charging state for the capacitors of the other direct voltage converters. The adjustment is repeated at the frequency of the oscillator of the first direct voltage converter.
REFERENCES:
patent: 4276590 (1981-06-01), Hansel et al.
Franzblau Bernard
Mayer Robert T.
Salce Patrick R.
Sterrett Jeffrey
U.S. Philips Corporation
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