Patent ID: 9041434
Filing Date: 2015-05-26
Classification: H02M,H03K

Abstract:
1. A control device for influencing a flow of energy in a load circuit between an electrical voltage source and an electrical load, having a semiconductor switch comprising a conductive section which is formed between an input connection and an output connection, adapted to be looped into the load circuit, and has an electrical resistance adjustable by means of an electrical potential which can be applied to a control connection associated with the semiconductor switch, and having a control circuit which is coupled to the control connection and comprises a freewheeling means connected in parallel to the load, wherein the control circuit is designed to supply a control current at the control connection which is proportional to a voltage via the freewheeling means, and wherein the control circuit comprises a voltage-current transformer and a coupling device connected electrically to the voltage-current transformer, wherein the coupling device is configured so as to provide an electrical current flowing through the voltage-current transformer in a proportional manner as control current at the control connection of the semiconductor switch, and wherein the control circuit includes a first control current path with a series connection of a first voltage-current converter and a first coupling device, and a second control current path with a series connection of a second voltage-current converter and a second coupling device together with a changeover device, which is designed in a first functional position to provide a control current via the first control current path, and in a second functional position to provide a control current via the second control current path, to the control connection of the semiconductor switch.