| 摘要 |
PURPOSE:To balance a current between choppers by a simple and inexpensive construction by interrupting a current deviation between the average value of a chopper current and the chopper current as a correcting amount to a chopper unit control system. CONSTITUTION:Chopper currents are detected by DC current detectors 8a, 8b, the outputs are converted by DC voltage detectors 23a, 23b into voltages, and added by an adder 30. A current deviation between the chopper input current and the average value of the input currents of chopper units is obtained by adders 24a, 24b, the outputs are applied through limiters 25a, 25b to adders 26a, 26b, and current deviation of the choppers is interrupted to the output of an error amplifier 13. |
