EPS Motor Housing Thermal Layout for Compact ECU Heat Dissipation

The patent merges the heat dissipation function into the motor housing by providing thermal radiation regions directly on the motor housing surface. The power supply circuit part and power conversion circuit part are mounted on these thermal radiation regions, allowing the motor housing to serve dual purposes: mechanical support and heat dissipation. This eliminates the need for a separate heat sink member, thereby reducing the axial length while maintaining effective heat dissipation.

The motor housing is designed to perform multiple functions: it provides mechanical support for the motor components and simultaneously serves as a heat dissipation structure through its thermal radiation regions. By making the motor housing multi-functional, the patent eliminates the need for additional dedicated heat dissipation components, thus reducing the overall axial length of the apparatus.

The patent combines the heat dissipation function with the motor housing structure by creating thermal radiation regions on the motor housing surface. The power supply circuit part and power conversion circuit part are directly mounted on these regions, enabling efficient heat transfer from the circuit parts to the motor housing, which then radiates heat to the surrounding environment. This integration allows compact design without compromising heat dissipation capability.

The motor housing is designed with specific thermal radiation regions that have optimized thermal properties for heat dissipation. These regions are located at positions that maximize heat radiation efficiency while maintaining the overall compact structure. By applying local quality optimization to specific areas of the motor housing, the patent achieves effective heat dissipation within a compact apparatus volume.