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Periodic revs altering device has control unit producing signal by which revs e.g. of ventilating fan are periodically altered
Periodic revs altering device has control unit producing signal by which revs e.g. of ventilating fan are periodically altered
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机译:定期转速改变装置具有控制单元产生信号,通过该信号产生转速。换气扇的数量定期更换
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摘要
The revs altering device consists of a control unit (10) arranged to produce a signal by which the engine revs can be altered periodically. The control unit produces a signal by means of which the revs of the motor (18) are periodically altered in at least one preset revs range. The signal may be based on frequency or amplitude.
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