Control System and Control Method

Abstract

The present disclosure provides a control system (100, 200, 300) for controlling a single phase induction motor (150, 250) with a main winding (151, 251) and with an auxiliary winding (152, 252), the control system (100, 200, 300) comprising a first bidirectional switching element (101) and a second bidirectional switching element (102), wherein the first bidirectional switching element (101) is arranged between a phase supply input (103, 203) of the single phase induction motor (150, 250) and the main winding (151, 251) and wherein the second bidirectional switching element (102) is arranged electrically parallel to the main winding (151, 251), a control unit (105, 205) coupled to the first bidirectional switching element (101) and the second bidirectional switching element (102), wherein the control unit (105, 205) is configured to control in an alternating manner during a positive half-wave of a supply voltage of the single phase induction motor (150, 250) the first bidirectional switching element (101) to provide a positive current to the main winding (151, 251) and the second bidirectional switching element (102) to provide a freewheeling current path for the positive current through the main winding (151, 251), and wherein the control unit (105, 205) is configured to control in an alternating manner during a negative half-wave of a supply voltage of the single phase induction motor (150, 250) the first bidirectional switching element (101) to provide a negative current to the main winding (151, 251) and the second bidirectional switching element (102) to provide a freewheeling current path for the negative current through the main winding (151, 251). Further, the present disclosure provides a respective control method.

Dependencies are inferred from the claim text.