Patent ID: 11894838
Assignee: WEBASTO SE
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A device for simultaneously controlling a plurality of semiconductor power switches in the case of pulsed loads in the high-voltage range,
wherein the driver voltages of the plurality of semiconductor power switches are provided via a transformer,
wherein the driver voltages for the plurality of semiconductor power switches are derived from the voltage of a single secondary winding of the transformer,
wherein electronic voltage level shifter circuits are provided in order to obtain the driver voltages at the required magnitude from the secondary winding of the transformer,
wherein the electronic voltage level shifter circuits each comprise a charge pump,
wherein one end of the respective load is connected to a corresponding semiconductor power switch of the plurality of semiconductor power switches and the other end of the respective load is connected to a switch which is connected to the secondary winding of the transformer,
wherein the each of the plurality of semiconductor power switches is bridged by a first capacitor on an input side, and the driver voltages obtained at the required magnitude are applied to the plurality of semiconductor power switches bridged by the respective first capacitor on the input side,
wherein the charge pump for providing the driver voltage comprises a second capacitor, which is connected at one end to that end of the load which is connected to the switch, which is connected to the secondary winding of the transformer, and
wherein, when the switch is closed, the second capacitor is charged to the driver voltage potential, and when the switch is opened, the first capacitor is charged with the charge of the second capacitor.