| 摘要 |
1. Control device for the power supplied to a monophased asynchronous electric motor, provided with an auxiliary starter winding in series with a capacitor 5, the power supply being of the elitting type with a controlled switch 8 such as a triac, this control device comprising means for causing to vary the conduction time of the switch 8 in function of the speed of the motor, characterized in that to vary the conduction time of the switch, and thus the power supply, in function of the speed, the said means use the voltage at the terminals of the capacitor 5 or at the terminals of auxiliary winding 4 and act on an assembly constituted by a resistance 11 in series with a capacitor 12 the common point of which 10 between the resistance and the capacitor is connected, through the intermediary of a diac 13 to the gate or basis 9 of the controlled switch 8, the assembly in series of this capacitor 12 and the resistance 11 being in parallel on the switch 8 and the said means acting on the value of the said resistance 11 or directly on the said gate or basis 9. |
