| 摘要 |
<p>A method and apparatus for controlling power supplied to a motor (60), comprising a power controller (58) having a source of electrical power (52) for providing the necessary power to operate the apparatus (50), an oscillator (56) for generating gating signals at a relatively higher frequency than the electrical power supplied, circuitry responsive to the gating signals for gating the low frequency electrical power to generate a DC voltage, and an inhibitor for inhibiting the generating of gating signals by the oscillator (56) to regulate the DC voltage generated so as to control the speed of any motor connected to the apparatus. The apparatus may be setup to inhibit the oscillator when certain circuit conditions such as an over current condition is detected. The apparatus may also be setup to keep the oscillator in an OFF state once inhibited until a specified amplitude or a period of the input signal has been reached.</p> |
