Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1988-06-08
1989-11-21
Salce, Patrick R.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363127, H02M 112
Patent
active
048826642
ABSTRACT:
In pulse width modulation (PWM) power regulation and amplification circuits, separate DC rectification and filtering circuitry is eliminated by providing synchronous output switching directly from an available AC source. Output switch steering logic connected to an AC power source, such as a square wave AC signal available at the secondary of an isolation transformer, receives the PWM control signal that is developed by a conventional pulse width modulator in response to an input signal and causes an output switch stage to selectively and synchronously connect the alternating current power across the load with the proper timing and polarity. Preferably the output switching stage includes a low pass filter for filtering out the higher frequency switching transients.
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Jackson Larry A.
Peckman Kristine
Rane Corporation
Salce Patrick R.
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