Motor starter, operating method, computer program product and motor starter arrangement
AssigneeSiemens Aktiengesellschaft
InventorsStephan Jonas, Peter Käsbauer, Norbert Reichenbach
Life of this patent
Estimating the term…
Abstract
A motor starter for operating an electric motor connected to a multiphase power supply includes a semiconductor switch arranged in a current-carrying phase of the multiphase power supply, and an electromechanical switch arranged in parallel relation to the semiconductor switch in the current-carrying phase. The electromechanical switch includes a movable switching piece configured tiltable to reduce a current gradient in the semiconductor switch.
Claims18
A motor starter for operating an electric motor connected to a multiphase power supply, said motor starter comprising:
- a semiconductor switch arranged in a current-carrying phase of the multiphase power supply;
- and
- an electromechanical switch arranged in parallel relation to the semiconductor switch in the current-carrying phase, said electromechanical switch comprising a movable switching piece configured tiltable to reduce a current gradient in the semiconductor switch.
A method of operating a motor starter including an electromechanical switch and a parallel semiconductor switch in a current-carrying phase of a multiphase power supply, said method comprising:
- in an operating state closing the electromechanical switch and opening the semiconductor switch;
- closing the semiconductor switch;
- and
- opening the electromechanical switch by detaching a first and a second end of a switching piece of the electromechanical switch from assigned stationary contacts, thereby reducing a current gradient in the semiconductor switch as a result of a tilting movement of the switching piece.
A computer program product embodied in a non-transitory computer readable medium, wherein the computer program, when loaded into a control unit and executed by the control unit, causes the control unit device to output an actuation command to a semiconductor switch and an electromechanical switch of a motor starter and to perform the steps of:
- in an operating state closing the electromechanical switch and opening the semiconductor switch;
- closing the semiconductor switch;
- and
- opening the electromechanical switch by detaching a first and a second end of a switching piece of the electromechanical switch from assigned stationary contacts, thereby reducing a current gradient in the semiconductor switch as a result of a tilting movement of the switching piece.
A motor arrangement, comprising:
- a multiphase power supply;
- a motor starter connected to the multiphase power supply, said motor starter comprising a semiconductor switch arranged in a current-carrying phase of the multiphase power supply, and an electromechanical switch arranged in parallel relation to the semiconductor switch in the current-carrying phase, said electromechanical switch comprising a movable switching piece configured tiltable to reduce a current gradient in the semiconductor switch;
- and
- an electric motor coupled to the multiphase power supply via the motor starter.
Dependencies are inferred from the claim text.