CPC H05B 1/02 (2013.01) [H01H 33/596 (2013.01); H02M 3/06 (2013.01); H05B 2203/013 (2013.01)] | 16 Claims |
1. An electrical heating apparatus, comprising:
a heat-emitting resistor;
a control device for switching the resistor; and
an earthed housing or chassis component that is at a potential without direct reference to a drive voltage,
wherein the heat-emitting resistor is arranged in spatial proximity to the earthed housing or chassis component and comprises has a first and a second partial resistors connected in series with one another,
wherein the control device comprises at least one switching device for switching the heat-emitting resistor,
wherein the first partial resistor, the switching device and the second partial resistor are connected in series and thus form a series connection, and the switching device is arranged between the first partial resistor and the second partial resistor,
wherein the first partial resistor and the earthed housing or chassis form a first partial capacitance, and the second resistor and the earthed housing or chassis form a second partial capacitance, and wherein the first and the second partial capacitances are formed in such a way that upon the switching of the resistor a current flowing in the first partial capacitance is at least partly taken up by the second partial capacitance, or vice versa.
|