Abstract
This paper compares controlled series capacitor (CSC) converters applied to generator-sets used in series hybrid electric vehicles (SHEV). The operation of each circuit is discussed and simulated using Matlab/Simulink. It is concluded that CSC converters can improve the power factor (PF) of the generator-set.
Highlights
An series hybrid electric vehicles (SHEV) has its wheels driven by an electric motor powered by a battery with an engine plant that cranks a generator unit to provide electric power to the battery and if necessary to the electric motor
In [1] it was concluded that none of the rectifier circuits provides high power factor (PF) with high output voltage in order to increase the overall efficiency of the power drive train of SHEVs
This paper describes, for the first time, the benefits and drawbacks of using controlled series capacitor (CSC) in SHEVs
Summary
An SHEV has its wheels driven by an electric motor powered by a battery with an engine plant that cranks a generator unit to provide electric power to the battery and if necessary to the electric motor. CSCs consists of a variable capacitor placed between the generator and the uncontrolled full-bridge diode rectifier varies with respect to the electric frequency, in order to match the inductance of the generator. The TSSC circuit, shown, consists of a number of capacitors in series, each shunted by a switch, composed of two anti-parallel thyristors [2]. The values of capacitors C1 and C2 have been chosen carefully to match the inductive reactance at low, and high frequencies. When the frequency is low, the inductive reactance becomes minimum and the PWM controller allows the current to pass through C2 only.
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