| 摘要 |
PROBLEM TO BE SOLVED: To provide a fault resistance power supply circuit for a series resonant load with inductive impedance. SOLUTION: A power supply circuit 10 is provided with the first and second sets of switches 30 which form a conduction condition alternately. The switches 30 supply electric current to a load 60 in an alternate direction. One terminal of the load 60 is connected to the midpoint of the switch 30. A protective coil 50 is connected to the midpoint between the load 60 and the switch 30 in series. In an embodiment, di/dt reactor 40 is connected in series between both of the switches 30. One end of the protective coil 50 is connected to the load 60 and the other end of the coil is connected to the di/dt reactor 40 at the midpoint between both of the switches 30. |
