Study On Outer Rotor High Speed Permanent Magnet Claw Pole Motor Co-simulation And Control System

Air compressors occupies is widely used in the chemical, petrochemical, infrastructure and national defense equipment. However, because of its gearbox and other device, the failure rate and noise are relatively high and low reliability. Axially segmented high speed permanent magnet claw pole motor is a new type of motor topology and its application eliminates the need for growth in air compressor unit and its external rotor motor could drive impeller directly, as a result can improve transmission efficiency and reliability and reduce maintenance costs. Hence it is need to carry out research work for the relevant article of the kind of motor control system to speed permanent magnet axially segmented outer rotor claw pole motor for the study. This paper proposed a control method for this kind of motor, and the control method is carried out in the research as well as development of simulation analysis and controller work, concrete work as follows:Firstly, the basic structure of the high-speed permanent magnet claw pole motor is presented in this paper, motor control principle is analyzed, and the mathematical model of the motor is developed. Position sensor control system and sensorless control system are compared, and analyzed the advantages of sensorless control system.Secondly, A three-dimensional model of the prototype and controllers are established. A co-simulation of the sensorless control system have done using Maxwell/Simplorer cosimulation platform. A double loop control strategy including speed loop using PI control and current loop using hysteresis control is applied in the controller model. Then analyze the commutation point of the motor after logic operations and control power devices on and off in accordance with the table commutation. Speed, current and torque waveforms have been presented in co-simulation analysis. The controller performance meet the needs for the design through analyzed waveform, and provides a theoretical support for controller optimization.Again, a sensorless control system is designed and built. The entire hardware system use TMS320LF2812 as the core, including three-phase power bridge circuit, power supply circuit, the optocoupler circuit and a detection circuit etc. For the DSP chip has powerful data processing capabilities and rich peripherals that eliminating a lot of complicated hardware circuitry. In the DSP integrated development environment CCS software, using C and modular programming mode initialization program, the main program, the interrupt service routine and AD conversion code are written.Finally, experimental platform is built and perform control system hardware debugging experiments and obtain experimental data. The work of this thesis are summarized and discussed at last.