Hub driving system all-in-one integration optimization design method

Abstract

The invention discloses a hub driving system all-in-one integration optimization design method. According to the technical scheme, the method comprises the steps of defining a design domain and an initialized design variable; by utilizing a multi-field coupling analysis platform, calculating a multi-field coupling characteristic of the design domain; calculating an optimization objective functionand a constraint condition; judging whether a result is converged or not; if the result is converged, outputting the result; performing structure fine adjustment by considering machinability and manufacturability, and re-performing multi-field coupling calculation; if the result is not converged, performing topology optimization of subsystems of the design domain in a subsystem optimization layer;performing system level coordinative optimization on optimal solutions of the subsystems to obtain system level optimal solutions; and performing design variable update by taking the obtained systemlevel optimal solutions as initial values of optimization iteration, and performing a new round of a multi-field coupling calculation iteration process, until a global optimal solution is obtained. The method disclosed by the invention can better solve the problems of conflict of power density and cooling constraints restricting the development of hub driven electric vehicles, smoothness and comfort deterioration and the like at present.

Description

technical field [0001] The invention relates to the field of electric vehicle design, in particular to an integrated optimization design method for a wheel drive system. technical background [0002] The integrated design of the in-wheel motor drive system, as the core technology of in-wheel motor-driven electric vehicles, has a direct impact on the driving / braking performance of each driving wheel and the driving performance of the vehicle. Due to the limitation of space and operating environment, and because of the large driving torque required at low speeds, the current integrated design of the wheel hub drive system is mostly designed from the perspective of satisfying the dynamic performance of the vehicle, and strives to make the drive system reach a higher level. High torque density and power density are generally limited to analyzing the electromagnetic field to determine product design parameters when designing. How to take into account the torque / power density, he...

AI Technical Summary

Problems solved by technology

How to take into account the torque / power density, heat generation / heat dissipation, and lightweight performance of the in-wheel motor drive system at the same time, and carry out a comprehensive balanced optimization design involving multiple performances is the solution to the power / torque density that currently restricts the development of in-wheel motor-driven electric vehicles. The key to conflicting cooling constraints and deteriorating vehicle ride comfort due to increased unsprung mass

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