The Study On The Principal Axis Control System Of Variable Vector Propeller

Submarine is a kind of important facilities in ocean exploitation and research. With the development of submarine it requires lighter, smaller fittings. Variable Vector Propeller is able to reduce propellers and consequently to contribute to the compactness and the light weight of submarine. Permanent Magnet Synchronous Motor(PMSM) has good characteristies of small size and high efficiency,etc. The control technology of a position sensorless PMSM not only cuts down the cost of system, but also increases the security of system, which is the driving manner the paper uses.This paper is aiming at principal axis propelling position sensorless PMSM system of Variable Vector Propeller(VVP). According to the principal axis propelling system demand of VVP, select the model for the electromotor system. Then, set the methematic model and statement equation of the PMSM on the d and q axis system. Based on the principal of vector control technology and the character and matierial of the PMSM, choose the vector control manner for the control manner of VVP principal axis system.A new position sensorless PMSM control manner of VVP is addressed in the paper to satisfy the demand of the simple realization, which is based on the sliding mode observer. The vector control manner can work well with observer gets the pole position and rotate speed information. The manner applies the start manner of initialization orientation with segmentation up-frequency, which settle the problem of rotor calculation exaction because of the voltage of motor being small and the signal-to-noise of detecting current being low. What's more, the manner asures that position sensorless PMSM control runs without dead-area and has the enough starting torque. On analysing the reason of the phase lag that the sliding mode observer detects, an advanced algorithm is presented to compansate the phase for the detected rotor station angle, which is easy to be realization. The method is segmentation turbulator compensation. The high performance control chip is adapted to design the digital control system,in which current detecting methal is based on bus resistor. The hardware system has good structure and security to satisfy the demand of the position sensorless PMSM controlling. The simulation and experiment study of the vector control shows that the performance of the position sensorless algorithm is perfect.