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As the compensation type is important in an inductively coupled power transfer system, a novel LCC/S compensation topology has been proposed in this paper, which features the advantage of the adjustable constant gain with zero voltage switching turn-on. The symmetric T type high-order compensation type is specifically introduced in this paper, which is not sensitive to the parameter deviation and...
This paper presents a magnetic coupling resonant wireless power transfer (MCR-WPT) system. Two separated coils form a loosely coupled transformer. The primary side adopts a Class-E amplifier, which produces high frequency sinusoidal current to excite the primary winding, inducting a high frequency AC voltage in secondary winding. The secondary side adopts a Class-E rectifier to rectify the high frequency...
A two-stage quasi-resonant LED driver with digital control method is proposed in this paper. The first stage of this converter is a boost circuit with power factor correction (PFC) function and the second stage is a dual Buck circuit which works in quasi-resonant zero voltage switching (ZVS) state. Because of the soft switching characteristics of the converter, switching losses are reduced and efficiency...
Compensation is a vital part in Inductively Coupled Power Transfer (ICPT) to achieve higher efficiency, power density and reliability. This article proposes two unilateral LC compensation topologies for ICPT system after thorough theoretical analysis, which achieve both zero-voltage switching and constant voltage output characteristics over a wide range of load. A 300W phase-shifted full bridge DC-DC...
This paper presents a new kind of digital 70 W metal halide lamp electronic ballast. Dual-buck half bridge with high efficiency and reliability is chosen here, with this topology, ZVS can be achieved easily. The AVR special microcontroller for HID ballast is used to raise control performance, and low-frequency square-wave control method is adopted to avoid acoustic resonance. Experimental results...
This paper analyses the principle of a novel full-bridge/half-bridge hybrid vehicle switches power circuit designed by using phase-shifted PWM technique. main advantages of this circuit are zero-voltage switching under all operating conditions with higher efficiency, higher power density, lower electromagnetic conduction loss penalty, better dynamic response and significant lower filter requirement...
This paper presents a low-cost low-frequency square-wave digital electronic ballast for high density discharge (HID) lamps. A highly efficient and reliable topology-dual buck half-bridge inverter (DBI) is adopted to supply the lamp with low-frequency square-wave positive and negative current avoiding acoustic resonances. The constant bus voltage is provided by the front end PFC stage. The DBI is controlled...
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