计及转矩储备的车用双转子电机转矩控制策略

Torque Control Strategy for Dual-Rotor Motor for Vehicles for Torque Reserve

摘要:

针对电机定子电流变化率受到定子绕组电感的制约，进而影响电机转矩的快速变化的问题，提出了一种计及转矩储备的车用双转子电机转矩控制策略。首先，推导了双转子电机的数学模型，分析了转矩空间变化率的基本表达式及其与矩角特性之间的关系；其次，基于永磁电机的矩角特性，制定了计及转矩储备的电流控制策略，即在转矩快速变化之前预先加载定子电流，使得转矩快速变化阶段可保持定子电流恒定，以便通过转子的旋转带动转矩角的变化来实现转矩的快速输出；最后，搭建了转矩储备控制策略的仿真模型和实验台架，通过仿真和实验验证了所提出控制策略的正确性与可行性。

Abstract:

In this paper， a torque reserve control strategy for dual-rotor motor for vehicles is proposed to address the issue that the rate of change of motor stator current is limited by the inductance of the stator windings， which affects the rapid change of motor torque. Firstly， the mathematical model of the dual-rotor motor is derived， and the basic expression for the spatial rate of torque change is analyzed along with its relationship to the torque-angle displacement characteristic. Next， a current control strategy considering the torque reserve is formulated based on the torque-angle displacement characteristic of the PMSM. Specifically， the stator current is preloaded before the rapid torque changes， while maintaining the stator current constant during the rapid torque change stage， aiming to achieve the rapid torque output by the change of the torque angle driven by the rotation of the rotor. Finally， a simulation model and experimental platform for the torque reserve control strategy are created， and the correctness and feasibility of the proposed control strategy are verified through simulations and experiments.