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It's a single rotor helicopter powered by batteries made by US Hybrid.
萤火虫项目是一种单旋翼直升机，使用美国混合动力(US Hybrid)公司制造的电池。
Hybrid stepping motor rotor with permanent magnets, excitation and produced by permanent magnet electromagnetic torque realize stepping operation.
混合式步进电机的转子用永久磁钢，由励磁和永磁产生的电磁力矩实现步进运行。
Experimental results show that the novel rotor current hybrid control system can satisfy the requirement of VSCF wind generator system, and the power factor control of generated power is available.
实验结果表明，该新型转子电流混合控制结构可以满足变速恒频风力发电机系统的运行要求，同时实现了发电机的输出功率因数可控。
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