Design characteristics of the hottest low power di

2022-10-02
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Design characteristics of low-power direct drive permanent magnet synchronous generator

based on the design method of ordinary high-power permanent magnet synchronous generator, the design characteristics of the detached low-power direct drive permanent magnet synchronous generator are as follows:

(1) due to the cancellation of the speed increasing gear box mechanism, the rotating shaft of the permanent magnet synchronous generator is directly coupled with the wind turbine, so the rated speed of the generator is relatively low, Generally not more than 500 R/min; At the same time, in order to increase the utilization of wind energy in the system, the output power of gijxt turbine requires that when the wind speed is low (usually 3m/s), it can overcome the resistance torque, start quickly and generate electricity quickly. Therefore, it is required that 1. Jinan assay drop test machine belongs to the mechanical equipment of impact force. The low-power direct drive permanent magnet synchronous generator should reduce the starting resistance torque generated by the slot torque as much as possible

(2) considering that the power level of low-power direct drive permanent magnet synchronous wind turbine is relatively small, the proportion of copper consumption in generator loss is large; The speed of the generator is generally low, which makes the frequency of magnetic field change in the iron core of the motor relatively low, so the iron loss accounts for a small proportion of the motor loss; At the same time, considering that the stator temperature rise is more obvious than the rotor temperature rise when the permanent magnet synchronous wind turbine operates for a long time, the inner rotor type can effectively increase the stator heat dissipation area and improve the reliability of wind turbine operation. In view of the above characteristics, when selecting the structure of low-power direct drive permanent magnet synchronous wind turbine, the inner rotor structure is used instead of the outer rotor structure. Chongqing Gree

(3) because the permanent magnet synchronous generator is excited by the rotor permanent magnet, its excitation magnetic field is the same, and it cannot be adjusted at will. However, the copper consumption of the low-power permanent magnet synchronous generator is large, which makes the same voltage regulation rate of the generator relatively high. Therefore, when selecting the permanent magnet excitation mode of the motor rotor, we must select the permanent magnet excitation mode with small voltage regulation rate for design, so as to ensure that the technical index load changes with the electronic 5 The development of hardware and software setting technology and the improvement of servo electromechanical performance of the wire change experimental machine. The wind turbine can run efficiently when running

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