Patent ID: 7777438
Filing Date: 2010-08-17
Classification: H02P

Abstract:
1. A motor start circuit for an induction motor with a main winding and an auxiliary winding having two end connections supplied with current via current supply connections, the motor start circuit comprising: a control device being connected between the current supply connections; a start circuit device for stopping the current flow through the auxiliary winding after the start of the motor and being connected via a conductor to the control device; a period duration presetting device setting a predetermined period and being connected to or integrated in the control device, wherein a preset timer device of the control device interacts with the start circuit device to stop the current flow through the auxiliary winding when the predetermined period after the start of the current flow lapses; and a voltage presetting device setting a predetermined voltage value and being connected to the control device, wherein the control device interacts with the start circuit device to stop the current flow through the auxiliary winding when the predetermined voltage value is exceeded; wherein a second end connection of the auxiliary winding is connected to the control device via at least one additional conductor, the at least one additional conductor comprising a resistor of the voltage presetting device.