Amplifiers – Modulator-demodulator-type amplifier
Patent
1999-07-28
2000-10-31
Shingleton, Michael B
Amplifiers
Modulator-demodulator-type amplifier
330207A, 330251, 363132, H02M 75387, H03F 338, H03F 2100, H03F 3217
Patent
active
061408735
ABSTRACT:
A power amplifier for delivering large currents as well as high voltages of the order of some hundreds of amperes and 1000 or more volts, notably for MRI. The amplifier is constructed as a multilevel inverter in order to comply with the requirement of high voltages while utilizing transistors capable of withstanding lower voltages only. The amplifier is arranged for soft switching, so that the switching losses at said large currents are limited.
REFERENCES:
"Imbricated cells Multi-Level Voltage Source Inverters for High Voltage Applications" by T.A. Meynard, H. Fochin EPE Journal, vol. 3, No. 2, Jun. 1993, pp. 99-106.
"The Auxiliary Resonant Commutated Pole Converter" by R.W. De Doncker and J.P. Lyons, IEEE Industry Application Society Annual Meeting, 1990, vol. 2, pp. 1228-1235.
Renfrew Dwight H.
Shingleton Michael B
U.S. Philips Corporation
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