Heating system for a hybrid electric vehicle

Details Heating system for a hybrid electric vehicle Heating system for a hybrid electric vehicle

B - Operations, Transporting

60

H

B60H 1/14 (2006.01) B60H 1/00 (2006.01) B60L 11/00 (2006.01) B60L 11/12 (2006.01) B60K 6/02 (2006.01) B60K 6/04 (2006.01)

Patent

CA 2254022

A hybrid electric vehicle includes a traction motor driven by a traction battery, and a supplemental or secondary electrical source for charging the traction battery. In order to warm the passenger compartment during cold weather, heat is applied from the traction motor and the secondary source. Under some conditions, there may be insufficient heat to adequately warm the passenger compartment. The traction motor efficiency is lowered, so that more heat is generated, to aid in supplying the deficiency. In an embodiment in which the traction motor is an ac motor, the efficiency is lowered by applying a direct current to the motor. In an embodiment in which the ac motor is an induction motor, the efficiency is lowered by increasing the average slip frequency.

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