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A novel arrangement of n transformers delivers power at n times the line frequency. Ratings compare with transformers of the same weight. Waveform and voltage regulation are excellent. An experimental 7X unit with 60-cycle input gave 3.6 kw of 420-cycle output at approximately 90% efficiency. An additional 5X stage gave 2,100 cycles. Applications include high-speed a-c motors, fluorescent lighting, induction heating, control, and communication equipment.
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Marvin Camras (1963) studied this question.
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