全数字转差轴角变换器

Research on all digital R2D converter for angular position difference

针对双转子电机在实现精确矢量控制时需要其内外转子的相对转速/相对转角信息的问题,提出一种基于旋转变压器测量双转子电机内外转子的相对转速/转角的方法。首先,基于坐标变换对旋转变压器的全数字轴角变换算法进行改进,设计一种全数字转差轴角变换算法,使改进后的算法可对相对转速/相对转角进行精确闭环跟踪,而且轴角变换算法的复杂度较直接求差获得相对转速/转角可以减少一半,使其易于实现。其次,通过仿真分析验证全数字转差轴角变换算法的正确性,并基于TMS320F2812设计相对转速/转角测量系统,进行相关的硬件设计和软件设计。最后,通过实验验证了所设计系统的可行性。

For realizing vector control on the double-rotor-machine, it is necessary to acquire the relative angular speed/position between the inner rotor and the outer rotor.A method for measuring the relative angular speed /position based on resolvers was put forward.Firstly, based on the transformation of coor-dinates, the all-digital R2D algorithm was improved to close-loop track the relative angular speed/position between two different rotors while the complexity of the algorithm is not increased, which made the con-verter easily realized.Secondly, simulation was done to prove the correctness of this algorithm, and then a measure system was designed based on TMS320F2812, including its hardware and software.Finally, experiment was finished to prove the reliability of this system.