ARRANGEMENT FOR A POWER ELECTRONICS UNIT IN A HYBRID VEHICLE
First Claim
1. Arrangement for a power electronics unit in a hybrid vehicle power train, the hybrid vehicle power train comprising a combustion engine arranged for propulsion, and an electric motor/generator arranged for propulsion, a transmission with a transmission housing, the transmission is arranged to adapt gear ratio between at least one of the propulsion units and driven vehicle wheels, the motor/generator is arranged to exchange electric power with a power electronics unit, a cooling arrangement comprising cooling channels for cooling at least the power electronics unit, the power electronics unit is shaped substantially as a plate, where a first biggest cross-sectional area of the plate is extended substantially along and substantially within a first transmission side of the transmission housing and covering at least a part of the first transmission side, the power electronics unit is fixed to the hybrid vehicle power train with at least one first attachment point, wherein all attachment points have a total thermal conductivity corresponding to more than 10 degrees temperature difference on a Kelvin-scale between the power electronics unit and outside surface of the first transmission side and/or outside surface of the motor/generator for 5 kW of heat originating from one side of the attachment point.
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Accused Products
Abstract
In an arrangement for a power electronics unit in a HEV, the HEV including a combustion engine, an electric motor/generator, a transmission, the power electronics unit is shaped as a plate. The plate is extended along a transmission side, the power electronics unit is fixed to the power train with a first attachment point. All attachment points have a total thermal conductivity corresponding to more than 10 degrees temperature difference on a Kelvin-scale between the power electronics unit and outside surface of said first transmission side and/or outside surface of the motor/generator for 5 kW of heat originating from one side of said attachment point. Embodiments also including sound damping capabilities are disclosed. The arrangement facilitates use of fewer parts and increased functionality.
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15 Claims
- 1. Arrangement for a power electronics unit in a hybrid vehicle power train, the hybrid vehicle power train comprising a combustion engine arranged for propulsion, and an electric motor/generator arranged for propulsion, a transmission with a transmission housing, the transmission is arranged to adapt gear ratio between at least one of the propulsion units and driven vehicle wheels, the motor/generator is arranged to exchange electric power with a power electronics unit, a cooling arrangement comprising cooling channels for cooling at least the power electronics unit, the power electronics unit is shaped substantially as a plate, where a first biggest cross-sectional area of the plate is extended substantially along and substantially within a first transmission side of the transmission housing and covering at least a part of the first transmission side, the power electronics unit is fixed to the hybrid vehicle power train with at least one first attachment point, wherein all attachment points have a total thermal conductivity corresponding to more than 10 degrees temperature difference on a Kelvin-scale between the power electronics unit and outside surface of the first transmission side and/or outside surface of the motor/generator for 5 kW of heat originating from one side of the attachment point.
Specification