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Industry: Email Alert RSS FeedPWM microprocessor-controlled amplifier serves as a voltage or current source. (Copley Controls Model 290 pulse-width-modulation power amplifier) (technical)
EDN, June, 1988 by Ormond, Tom
PWM microprocessor-controlled amplifier serves as a voltage or current source The Model 290, a rack-mountable, pulse-width-modulation power amplifier, provides peak outputs of [plus-or-minus]160V at either [plus-or-minus]300A for the 290-06 version or [plus-or-minus]400A for the 290-08 version over a de to 3-kHz bandwidth. You can operate each amplifier either as a voltage or current source. The signal-processor board processes the input signal for a particular application and includes a switch for voltage-, current-, or test-mode operation. You can parallel as many as 30 amplifiers in a master-slave configuration to develop [plus-or-minus]7000A at [plus-or-minus]160V continuous power. The full-load heat dissipation equals 1500W, so efficiency specs at 95%.
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