Title :
A Filter-Less EMI-Free Power Converter Using a Diode-Clamped Linear Amplifier
Author :
Yamashita, Naoya ; Fujita, Hideaki
Abstract :
This paper proposes a new power converter for motor drive systems without any ac inductor nor EMI filter. The main circuit of the proposed circuit consists of a diodeclamped linear amplifier (DCLA) and a dc-voltage equalizing circuit. The dc-voltage equalizing circuit consists of a series-connected switched capacitor converter enabling to use a diode rectifier as its power supply. A zero-sequence voltage control method is introduced to expand the output voltage range as well as to reduce the theoretical power loss caused by an active-state operation. As a result, experimental results exhibit a high efficiency of 94.7% and a low conductive EMI emission adequate to meet the IEC61800-3 Category C1.
Keywords :
amplifiers; diodes; motor drives; power convertors; rectifying circuits; switched capacitor networks; voltage control; IEC61800-3 Category CI; dc-voltage equalizing circuit; diode rectifier; diode-clamped linear amplifier; filterless EMI-free power converter; low conductive EMI emission; motor drive systems; series- connected switched capacitor converter; zero-sequence voltage control method; Diodes; Electromagnetic interference; Inductors; Motor drives; Nonlinear filters; Power amplifiers; Power filters; Switched capacitor circuits; Switching circuits; Switching converters; Class-B amplifiers; EMI; PWM inverters; class-D amplifiers; dc-voltage equalizing circuits; diode-clamping circuits; linear amplifiers;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-2811-3
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2009.4802920
