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With introduction of recent standards on limiting harmonic pollution of electrical power distribution system, three-phase PWM converters are being considered as prime candidates for interfacing high-power electronic equipment to power supply lines. In these applications, converters can provide input currents without distortion and with unity power factor. In this paper, a unified discrete event model...
It is well known that transition current mode control for power factor corrector can reduce the reversal recovery loss for the diode. This method can be realized using discrete control integrated circuit which requires zero-crossing detection circuit. In this paper, a novel control technique for digital-controlled power factor corrector to achieve transition current mode control is proposed. The switching...
This paper describes the project development and the construction of a 50 kW AC/DC PWM power supply with power factor correction for use with plasma inertization plant. The main power circuitry is built on a industrial IGBT's three-phase bridge rectifier module configured in a boost regulator topology and supplies by means of an electronic chopper, the 850 Vdc link. To attend the Brazilian electrical...
A boost converter cascaded a buck converter based on the digital signal processor (DSP) is presented herein and used to provide various voltages for different operating speeds of the switched reluctance motor (SRM), so as to improve the power factor of the motor drive as well as the torque generation capability of the SRM. In design of such a two-stage converter, the first power stage constructed...
An integral battery charger is proposed for an electric scooter with Li-Ion batteries and Interior-permanent-magnet (IPM) traction motor. The battery charger is integrated in the power hardware of the scooter, with the IPM traction drive that operates as three-phase dc-dc converter with power factor correction (PFC) capability. The control of the PFC battery charger is also integrated into the traction...
This paper presents a new method to eliminate the harmonics contents of the input current. In conventional power factor converters the input voltage is assumed to be a sinusoidal wave and the converter switching is controlled such that the input current is aligned with the input voltage. Since the input voltage is not always a sinusoidal wave and may include different harmonics the input current aligned...
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