磁性槽楔对大型永磁风力发电机性能的影响

Effect of Magnetic Slot Wedge on the Performance of Large Permanent Magnet Wind Power Generator

介绍了磁性槽楔的种类和特点,以及磁性槽楔在电机节能方面的原理和实际作用。通过建立金风62型(1.2MW)永磁直驱同步风力发电机的电磁场模型,使用导磁性能不同的槽楔进行实际计算和测试,结果表明:发电机使用导磁性能较好的磁楔(相对磁导率为3～10)后,不论不带负荷还是带负荷,电机的气隙磁密分布都会较不使用磁楔变得更加均匀,磁密脉动和铁耗减小,气隙系数减小,电机的温升降低,效率得到提高。但同时应考虑到今后应尽可能地增大槽楔的电阻率,以减少槽楔自身的损耗,为永磁风力发电机效率的提高和优化设计提供计算依据。

The article briefed The category and feafures of magnetic slot wedge,as well as the principle and practical effect of magnetic slot wedge in the energy-sating of generator.By creating the electromagnetic field model of Golden Wind b2（1.2 MW）direct-driven permanent magnet synchronous wind power generator, through calculation and testings with different magnetic conductibility slot wedges ,the result showed that, after the slot wedges with better magnetic conductibility（relative magnetic conductivity being 3 - 10） were used,no matter the generator was at no-load or full-load.the magnetic flux density distribution in the air-gap became more even than without using magnetic wedge; magnetic pulsation, iron loss and air-gap coefficientwere redwced; the temperature rise of generator was decreased,with the efficiency improved.But in the future meanwhile,it should be taken iwto consideration to increase the magnetic slot wedge resistivity as possible, reduce the loss of slot wedge itself, to provide the calcnlation basis for increasing the efficiency of permanent magnet wind power generator and optimizing its design.