| 摘要 |
An electronic supply device for small motors (M) of a brushless type used, in particular, for ventilation of refrigerators and freezers, basically comprises an electronic drive circuit, in which there is provided an ac-to-dc converter through a phase-variation conduction; in this way, the performance features of the circuit are independent of the mains voltage (V), and hence the device enables production of a motor (M) which has high efficiency, is self-regulating, and provides a number of performance features, which are obtained simply by varying a reference voltage (Vx).
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