| 摘要 |
PROBLEM TO BE SOLVED: To avoid the unnecessary stop of a man conveyor in momentary power failure and dispense with restarting operation after power recovery. SOLUTION: A control circuit comprising a move-up electromagnetic contactor 1, a move-down electromagnetic contactor 2 and an electromagnetic brake coil 6 is connected to a constant voltage transformer 4 having an internal resonance circuit (an auxiliary coil 4c and a capacitor 4d) between AC power supplies R, S. In the power failure of the AC power supplies R, S, energy stored in the internal resonance circuit of the constant voltage transformer 4 is used for supplying power into the control circuit to maintain the operation of the control circuit. |
