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发明公开
CN107134915A 功率转换装置 无效 - 驳回 复审申请

功率转换装置
摘要：
本发明获得降低构成功率转换装置的FET的发热、并提高最大输出功率的改良后的功率转换装置。其具有：进行开关动作的2个1组的半导体开关，其中半导体开关由FET1a、FET1b和反并联连接于FET1a、FET1b的回流二极管构成；以及平滑电容器，通过半导体开关的FET1a、FET1b的互补开关动作进行功率转换，这种功率转换装置包括：对流过半导体开关的电流的方向进行检测的电流传感器；以及在流过半导体开关的电流的方向为负时、抽去半导体开关的PWM选通脉冲信号的导通信号的选通脉冲生成部。
摘要（英）：

The invention relates to a modified power converter which can reduce heating of FET that forms the power converter and can improve maximum output power. A power converter has one set of two semiconductor switches performing switching actions, each of which is formed of an FET and a free wheel diode connected in anti-parallel to the FET, and a smoothing capacitor, and convers power by complementary switching actions of the FETs in the semiconductor switches. The power converter is provided with a current sensor that detects a direction of a current flowing through the semiconductor switches and a gate generation portion that skips ON signals of PWM gate signals of the semiconductor switches when the direction of the current flowing through the semiconductor switches is negative.

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