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    • 4. 发明授权
    • Power supply apparatus
    • 电源设备
    • US07598694B2
    • 2009-10-06
    • US11712679
    • 2007-02-28
    • Hideo IshiiToru Arai
    • Hideo IshiiToru Arai
    • G05B5/00
    • H05K7/20209H02M3/00
    • A power supply unit includes an input-side rectifying circuit (4), an inverter (8) and an output-side rectifying circuit (12), which include power semiconductor devices. The power supply unit is powered during a powering period, and the powering is interrupted during a pausing period. The powering and pausing periods alternate. A fan (18) is driven during each powering period to cool the power semiconductor devices. A temperature detector (30) measures the temperature of the power semiconductor devices and develops a measured-temperature representative signal. A setter (38) produces a reference value, which decreases over the pausing period from the measured-temperature representative signal at the beginning of the pausing period to an intended-temperature representative signal representing the temperature to be attained by the power semiconductor devices at the end of the pausing period. The reference value is prepared from the measured-temperature representative signal at the beginning of the pausing period, the intended-temperature representative signal, and the length of the pausing period. An error amplifier (36) and a fan control unit (22) control the rotation rate of the fan (18) to make the measured-temperature representative signal track the reference value.
    • 电源单元包括输入侧整流电路(4),反相器(8)和输出侧整流电路(12),其包括功率半导体器件。 电源单元在供电期间供电,并且在暂停期间中断供电。 供电和暂停时段交替使用。 在每个供电周期期间驱动风扇(18)以冷却功率半导体器件。 温度检测器(30)测量功率半导体器件的温度并产生测量温度的代表信号。 设定器(38)产生参考值,其在暂停期间从测量温度代表信号在暂停期开始时减小到预期温度代表信号,该预期温度代表信号表示功率半导体器件在 暂停期结束。 参考值由暂停期开始时的测量温度代表信号,预期温度代表信号和暂停时间段的长度来制备。 误差放大器(36)和风扇控制单元(22)控制风扇(18)的旋转速度,使得测量温度代表信号跟踪参考值。