| 摘要 |
A power supply device supplying power to various electric devices or inverters of a DC motor. The power supply device can detect an over-voltage which is applied to various electric devices or inverters of a DC motor from an external power source or an over-voltage caused by defects of power lines. The power supply device can break power, such that power supply circuits or systems can be protected against damage and malfunction thereof. The power supply device includes a rectifier rectifying power from an external AC power source, a smoothing unit, and an over-voltage protection circuit determining whether the rectified voltage includes an over-voltage, and breaking the over-voltage before the over-voltage is applied to the smoothing unit if the determination is positive.
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