A Controlling Method Of Permanent Magnet Synchronous Motor Using A Hall Sensor For Hybrid Electric Vehicle (HEV)

China has been one of the countries which hold a big number of automobiles in the world. The oil used by the automobile is increasing rapidly. The pollution of environment caused by tail gas is increasingly serious. The most practicable solution is that invent a new green environmental protecting automobile, therefore the hybrid electric vehicle comes into our eyes. According to the estimation of experts, 10% to 30% oil can be saved using the hybrid electric vehicle comparing with the normal automobiles. It is obvious that there is considerable practical significance to expand the hybrid electric vehicle. The hybrid electric vehicle technology of China has achieved lots of success though starting is late. The hybrid electric vehicle technology of China is developing rapidly now. The power motor system for vehicle is the key part for the power system of the hybrid electric vehicle, the electric power system and the solution of the oil pollution and so on. The controlling method of PMSM using a Hall sensor for Hybrid electric vehicle is a new controlling method, which aims at the core PMSM controlling technology of the hybrid electric vehicle. The intention is both reduce the cost of the system and improve the controlling accuracy of the PMSM. The controlling method of PMSM using a Hall sensor for Hybrid electric vehicle has applied for patent. The invention belongs to an electrization mechanism field, in particular to a controlling method of PMSM using for Hybrid electric vehicle.The power motor system for vehicle is designed in specialty for hybrid electric vehicle which is powered by the system. Due to relative complicated working circumstance and startup demand of heavy torque of hybrid electric vehicle, the motor and its controller have to meet the these demands that: relative accurate controlled resolution, fast response speed, widely range of speeds of rotation and timely switchover between electromotion circumstance and dynamoelectric circumstance. It is necessary to use PMSM as a power motor of hybrid electric vehicle because of the demands above mentioned.The hall sensor can provide a resolving capability of 60 electric angles only, but the accurate control of the PMSM demands a consecutive angle signal. Therefore using hall sensor as a control signal directly can satisfy the control demand of the permanent magnet brushless motor but can't satisfy the control demand of the PMSM. To implement the accurate control of the PMSM, increasing the resolving capability of electric angles is necessary. The common methods to increase resolving capability of electric angles are that achieve the factual electric angle of the running motor by rotary encoder and magslep. It is the most convenient to use rotary encode to calculate the factual electric angle of the running motor. The signals which send by the magslep after processing by the hardware is the same to the rotary encode, but the magslep adopts photoelectric sensor, which can't endure the adverse environment of the vehicle. The cost of the magslep and its hardware is also too much. In general adopting the rotary encoder is a common method of the hybrid electric vehicle. The whole cost is about 3000 yuan.The patent technology adopts three phases signal of the hall sensor, which takes the rising edge and the trailing edge of the three phases signal as the input signal frequency of the digital phase-locked loop. The signal inputs the digital phase-locked loop. One degree resolving capability can be achieved if the digital phase-locked loop adopts 60 frequency doubling. Half degree resolving capability can be achieved if the digital phase-locked loop adopts 120 frequency doubling. Adjust the output signals of the angle by the rising edges of the three phases signal of the hall sensor. We estimate the factual electric angle of the running motor adopting digital method making use of the high-speed computational capability of the DSP with the hall sensor which is often used in the permanent magnetic dc brushless motor. The cost is less than 100 yuan and the reliability is excellent because of using the mature technology. The cost can be greatly reduced and improve the reliability of the PMSM controller in the way.The paper expatiates mathematical model and primary controlling methods of PMSM, analyzes basic motion control manoeuvre of PMSM and the PMSM controlling technology project using HALL sensor. Finished the software system and hardware system of the motor controller and analyzes the experiment results. Complete the PMSM controller basing on MotololaMC56F8367. Explain the design methods of controlling circuits and EMC of the scales about the hardware. Basing on the hardware, realize the patent technology that the controlling method of PMSM using HALL sensor for vehicle by software. The software is compiled with C language and assemble language.The motor runs all right after adopting the patent that the controlling method of Permanent Magnet Synchronous Motor using a Hall sensor for Hybrid electric vehicle. Comparing with the method using a Hall sensor signal directly, the resolving capability of the electric angle is improved from 60 degrees to 1 degree, so the control accuracy is improved greatly and the current picture of the running motor is also greatly improved. It is believed that the patent technology can achieve a better control effect with the improvement of the software system and hardware system.