Torque distributing and controlling method based on efficiency optimization for double motors in hybrid power system

Abstract

The invention relates to a torque distributing and controlling method based on efficiency optimization for double motors in a hybrid power system. The hybrid power system supports the double motors (namely a TM motor and an ISG motor) to simultaneously carry out driving work and electricity generating work. The method comprises the steps: providing an all-condition efficiency graph about the driving and the electricity generating of the TM motor and the ISG motor under the all working condition; calculating the optimized distribution of the driving torque and the optimized distribution of the electricity generating torque between the double motors; associating each of Rate_Mot and Rate_Gen, which are obtained under the condition of different rotating speeds, with the rotating speed and the torque T distributed into the TM motor and the ISG motor to obtain an off-line computation table; and distributing the torque between the double motors. Through the adoption of the method disclosed by the invention, the torque can be reasonably and efficiently distributed between the double motors, the respective performance advantage can be fully taken, the work efficiency of the system is obviously improved, the energy consumption cost of a vehicle is reduced, and therefore, the goals of energy conservation and environmental protection can be realized.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle control, and in particular relates to a dual-motor torque distribution control method based on efficiency optimization in a hybrid power system composed of an engine and a dual-motor (including a TM motor and an ISG motor) as a power source. Background technique [0002] In the prior art, for a hybrid electric vehicle system that uses an engine and dual motors (including TM motors and ISG motors) to form a hybrid power source, there are no patent documents, etc. that involve how to connect the dual motors in the hybrid system. For torque distribution and control. Therefore, it is necessary to provide corresponding control methods to distribute torque reasonably and efficiently between TM motors and ISG motors, so as to give full play to their respective performance advantages, prolong their service life, save vehicle energy consumption as much as possible, and improve the overall s...

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Problems solved by technology

[0002] In the prior art, for a hybrid electric vehicle system that uses an engine and dual motors (including TM motors and ISG motors) to form a hybrid power source, there are no patent documents, etc. that involve how to connect the dual motors in the hybrid system. For torque distribution and control

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