US 11,984,830 B2
Inverter with switch control and a method of controlling an inverter
Panagiotis Mantzanas, Erlangen (DE); Daniel Kübrich, Schlüsselfeld (DE); Thomas Dürbaum, Baiersdorf (DE); Alexander Bucher, Nuremberg (DE); Alexander Pawellek, Erlangen (DE); Christian Hasenohr, Erlangen (DE); and Harald Hofmann, Nuremberg (DE)
Assigned to Valeo Siemens eAutomotive Germany GmbH, Erlangen (DE)
Appl. No. 17/629,900
Filed by Valeo Siemens eAutomotive Germany GmbH, Erlangen (DE)
PCT Filed Jul. 27, 2020, PCT No. PCT/EP2020/071115
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/018827, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 10 2019 120 438.0 (DE), filed on Jul. 29, 2019.
Prior Publication US 2022/0255488 A1, Aug. 11, 2022
Int. Cl. H02P 27/08 (2006.01); H02M 7/5395 (2006.01); H02P 6/08 (2016.01); H02P 21/00 (2016.01)
CPC H02P 27/085 (2013.01) [H02M 7/5395 (2013.01); H02P 6/08 (2013.01); H02P 21/0089 (2013.01); H02P 2201/13 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A control device for an inverter that feeds an electric machine, wherein the control device comprises:
a computer; and
a computer program comprising commands which, when executed by the computer, cause the control unit to:
provide pulse-width-modulated switching signals at a carrier frequency to drive switching elements of the inverter, and
ascertain the carrier frequency within at least one operating range depending on a piece of operating point information that describes an operating point defined by a rotation speed and a torque of the electric machine in such a way that the carrier frequency is reduced within the at least one operating range compared to a maximum carrier frequency operating point at which a maximum carrier frequency is specified in the operating range,
wherein an operating range has a full-load operating point, at which a maximum torque that is specified in terms of absolute value for its rotation speed is present, as the maximum carrier frequency operating point and extends into partial-load operation, and
wherein the control device is configured to reduce the carrier frequency as the distance from the maximum carrier frequency operating point increases.