US 12,134,320 B2
Method for heating a motor vehicle
Kai Soeren Mueller, Stuttgart (DE); and Johannes Wende, Heilbronn (DE)
Assigned to DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT, Stuttgart (DE)
Filed by Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Stuttgart (DE)
Filed on Mar. 16, 2022, as Appl. No. 17/695,858.
Claims priority of application No. 10 2021 107 091.0 (DE), filed on Mar. 23, 2021.
Prior Publication US 2022/0305921 A1, Sep. 29, 2022
Int. Cl. B60L 15/20 (2006.01); B60H 1/00 (2006.01); B60L 53/22 (2019.01); B60L 58/27 (2019.01); H02P 21/22 (2016.01); H02P 27/08 (2006.01)
CPC B60L 15/20 (2013.01) [B60H 1/00642 (2013.01); B60L 53/22 (2019.02); B60L 58/27 (2019.02); H02P 21/22 (2016.02); H02P 27/08 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for heating a motor vehicle comprising a three-phase electric motor as a traction motor, the method comprising:
providing a pulse-controlled inverter for supplying power to the electric motor; and
providing a coolant circuit for cooling the electric motor and the pulse-controlled inverter using coolant, the coolant circuit using the coolant to supply heat to a heat exchanger for heating a passenger compartment and/or a vehicle battery,
generating heat loss by controlling a positive d current and negative d current in a d-axis of the electric motor while keeping the electric motor stationary, and introducing the heat loss into the coolant,
wherein generating the heat loss includes causing power losses from a winding of the electric motor and eddy current losses in laminations, and
wherein generating the heat loss includes causing heat loss in the pulse-controlled inverter generated as on-state losses from one or more power switches and freewheeling diodes.