| 摘要 |
A clocking pulse generator includes means for receiving voltage from a multi-phase alternating current electrical power source. A vector summing circuit provides a non-zero resultant vector for various combinations of multi-phase operating conditions. A multi-phase voltage dividing circuit couples the receiving means to the vector summing circuit. The non-zero resultant vector is converted into a halfwave rectified signal and applied to a first input of a comparator. The second input of the comparator is coupled to receive a preset threshold voltage. The comparator generates an output which provide clocking pulses therefrom.
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