US 11,758,620 B2
Arrangement for switching a resistor
Alexander Henne, Stockdorf (DE); Norbert Botzenmayer, Stockdorf (DE); and Hans Rechberger, Stockdorf (DE)
Assigned to WEBASTO SE, Stockdorf (DE)
Appl. No. 16/627,082
Filed by Webasto SE, Stockdorf (DE)
PCT Filed Jun. 22, 2018, PCT No. PCT/EP2018/066703
§ 371(c)(1), (2) Date Dec. 27, 2019,
PCT Pub. No. WO2019/002112, PCT Pub. Date Jan. 3, 2019.
Claims priority of application No. 10 2017 114 714.4 (DE), filed on Jun. 30, 2017.
Prior Publication US 2020/0146110 A1, May 7, 2020
Int. Cl. H05B 1/02 (2006.01); H01H 33/59 (2006.01); H02M 3/06 (2006.01)
CPC H05B 1/02 (2013.01) [H01H 33/596 (2013.01); H02M 3/06 (2013.01); H05B 2203/013 (2013.01)] 16 Claims
OG exemplary drawing
 
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.