| 摘要 |
PURPOSE:To control with a constant current in a simple circuit configuration by controlling the saturating time of a saturable reactor of a controller by a constant-voltage detector controlled by an output signal of a constant-current detector. CONSTITUTION:A constant-current control circuit has a controller 4 including saturable reactors 401, 402, a rectifier 5, the first smoothing circuit 6, a constant- current detector 7 and a constant-voltage detector 8, and supplies a constant current output through the second smoothing circuit 9 to a load 10. Thus, the output terminal of the detector 7 and the output terminal of the detector 8 are connected with the input terminal of the controller 4, and the output of the detector 7 is connected with the input of the detector 8. Thus, when the load 10 varies, the saturating times of the reactor 401, 402 are controlled by the detector 8 to the prescribed load, the detector controls it through the detector 8 when it becomes larger than that to control with a constant current. |
