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In order to reduce the system cost, volumetric size and weight of an electric vehicles (EVs) battery charger, a novel four-switch two-leg VSI configuration is propose for rapid battery charging with the active power filter (APF) features. It consists of cost-effective two-arm bridge converter, coupling inductors, LC filters, buck converter and EV battery. Note that the conventional three-leg bridge...
The research target is the development of the DC/DC converter for charging from 200V NiMH or Li-Ion battery to 12V Lead-acid storage battery in hybrid cars such as Toyota Prius. In car, a 12V Lead-acid storage battery is used to operate air conditioner, main lights and various actuators in engine control unit etc. Before the lead-acid battery ends up all the discharge, it should be charged using the...
This paper proposes an advanced modulating dc-dc converter introducing improved delta-sigma modulation scheme. The proposed converter is compared to an original type delta-sigma modulated converter, and it is proved that the proposed converter is suitable for suppressing switching noise component.
To generate the switch control signal of power converters, pulse width modulation (PWM) measure is widely used. But this method causes large switching noise peaks on the carrier frequency. When delta-sigma modulation technique is used for power converter, this problem does not occur. Still the same problem arises in the case of dc-dc converter. This paper proposes a dc-dc converter introduces improved...
This paper presents two new circuit topologies of DC busline side active edge resonant snubber assisted soft-switching PWM high frequency AC link full-bridge DC-DC converter acceptable for 200V-rms and 400V-rms utility AC mains. All the power switches in the full-bridge arms and DC busline can turns on with ZCS turn-on and turn-off with ZVS and the switching power losses of all the switches can be...
In this paper, a novel type of auxiliary switched capacitor assisted edge resonant soft switching PWM resonant DC-DC converter with two auxiliary edge resonant lossless inductor snubbers. The operation principle of this converter is described using the switching mode equivalent circuits. This newly developed multi resonant DC-DC converter can regulate its dc output AC power under a principle of constant...
In this paper, a novel type of auxiliary switched capacitor assisted edge resonant soft switching PWM resonant DC-DC converter with two auxiliary edge resonant lossless inductor snubbers. The operation principle of this converter is described using the switching mode equivalent circuits. This newly developed multi resonant DC-DC converter can regulate its dc output AC power under a principle of constant...
This paper presents a novel circuit topology of isolated DC-DC power converter, which includes stable and efficient zero voltage soft switching (ZVS) full bridge inverter in the high frequency planer transformer primary-side and zero current soft switching rectifier in its secondary side. This power converter incorporates zero current soft switching (ZCS) phase-shifted PWM controlled two active power...
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