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- W2325466948 abstract "Recently, the voltage fed type PWM converters have been investigated from ideal and inherent properties as DC power source. But, the current control system generally used may be somewhat complicate due to the DC voltage detection.In this paper, we propose the simple control system of the PWM converter by means of power factor control in which the DC voltage detection is not always needed. In this system, the DC voltage is given by the line voltage and the modulating index of the PWM converter.The principle of the PWM control system is shown at first. From the simplified circuit model and its phasor diagrams, some basic relations of the PWM converter system are obtained and some fundamental characteristics are shown. From these investigations, it is seen that the phase control region is restricted to a certain angle, which depends on the setting power factor, the modulating index of the PWM and the load. Under the operating condition of unity power factor, it is given by ±π/4 for both the converting and inverting operations. The system can be operated over the all control range of the modulating index by restricting the angle to this critical value for the angle over this control range.The ideal operating characteristics as DC power source can be verified by some experimental results such as the operating waveforms of line current, the steady state characteristics and the transient responses between both operations of the converter and inverter.The features of the system are in the simple construction of the control circuit and some inherent and excellent characteristics as a voltage fed type DC power source.This control system may be applicable to any types of PWM converter used now." @default.
- W2325466948 created "2016-06-24" @default.
- W2325466948 creator A5025850623 @default.
- W2325466948 date "1990-01-01" @default.
- W2325466948 modified "2023-09-27" @default.
- W2325466948 title "Three-phase voltage fed type PWM power converter by means of power factor control." @default.
- W2325466948 cites W2395012424 @default.
- W2325466948 doi "https://doi.org/10.1541/ieejias.110.821" @default.
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