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A Sinusoidal PWM Series Voltage Regulator

机译：正弦PWM系列稳压器

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This article presents low cost pulse width modulated (PWM) ac voltage regulator that utilizes series voltage boost technology. The circuit does not require any kind of synchronization with the source mains. The basic component of the PWM ac regulator design is a series boost transformer in which the. primary voltage is controlled by a PWM control circuit. The control circuit is composed of a rectifier bridge and one transistor acting as a switch to energize the primary windings at the precise instant of the ac mains half cycle. The transformer secondary is connected in series with the mains supply. The load is connected across both the supply and the transformer. Voltage sags down to 50 percent have been accommodated for a line voltage of 120 volts and load up to 350 watts in an inexpensive laboratory implementation. The load voltage and current are sinusoidal with minimal harmonic as compared to the conventional phase-controlled competitor. The switching of the modulating devices is at high frequency resulting in the use of simple filtering elements. The device complies with ANSI standard C 84.1-1989 for class A secondary distribution voltage regulation.
机译：本文介绍了利用串联升压技术的低成本脉宽调制（PWM）交流稳压器。该电路不需要与电源干线进行任何形式的同步。 PWM交流稳压器设计的基本组成部分是串联的升压变压器。一次电压由PWM控制电路控制。控制电路由一个整流桥和一个作为开关的晶体管组成，该开关在交流电源半周期的精确瞬间为初级绕组通电。变压器次级与电源串联。负载连接在电源和变压器之间。对于120伏的线路电压，可以承受低至50％的电压跌落，并且在廉价的实验室实施中，负载可高达350瓦。与传统的相控竞争器相比，负载电压和电流为正弦波，谐波最小。调制装置的开关处于高频状态，从而导致使用简单的滤波元件。该设备符合ANSI标准C 84.1-1989中有关A级二次配电电压调节的要求。

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