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燃料电池混合动力系统总线电压对电机转矩及效率的影响

, PP. 140-145

Keywords: 汽车工程,燃料电池混合动力系统,总线电压,台架试验,电机转矩,电机效率

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Abstract:

为评价总线电压对电机转矩以及效率的影响,在动态测功机试验台架上设计相应的试验,测量总线电压在400~455V之间变化时某三相异步感应电机的输出转矩和效率。结果表明,在电机低效率区域,电机效率受总线电压影响较大。电机输出转矩相对于目标转矩有平均0.5s的延时,在高总线电压、高电机转速区域,电机控制器启动自保护功能,输出转矩远小于目标转矩。中国城市公交典型工况测试表明,对经济性影响最大的前80%的电机工况点主要分布于受总线电压变化影响较小的高效率区,在城市公交工况下对电机效率的粗略分析可以忽略总线电压的变化。

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