Patent ID: 9214879
Filing Date: 2015-12-15
Classification: B23D,B23Q,H02P

Abstract:
1. A soft start device applied to an electronic cutting machine tool, the machine tool having a motor, a cutting unit driven by the motor, and the soft start device connected with the motor, and the soft start device comprising a control circuit group, a first control switch, a second control switch, a light emitting circuit group, and a trigger circuit group; wherein the control circuit group comprises a regulator circuit and a control circuit, an input power source being connected to an end of the regulator circuit and the motor, the other end of the regulator circuit being connected to the control circuit; when the input power source provides a working voltage for the control circuit, the control circuit outputs a low-level signal to the first control switch, a light emitting unit of the light emitting circuit group generates light fading up for gradually decreasing a resistance of a sensing unit of the trigger circuit group to make the working voltage of the motor increase gradually and make the second control switch turned-off; after a period of time, the control circuit outputs a high-level signal to the first control switch to make the second control switch turned on for inputting the voltage to the motor directly.