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永磁发电机(以下简称永磁机)是作为水轮发电机组中调速系统及自动装置(转速继电器)的重要电源。因此永磁机性能的优劣,直接影响到水轮发电机组的运行质量。目前我国水电站运转机组的永磁机,随所采用的调速器不同,有两种结构型式:一为同步永磁机,配机液调速器;另一为感应子永磁机,配电液调速器。但不论哪种永磁机,它们都是以永久磁钢作为发电机的磁场的。为防止磁强减弱,出厂安装以后,发电厂在
Permanent magnet generator (hereinafter referred to as permanent magnet machine) is used as an important power supply for governor system and automatic device (speed relay) in hydro-generator set. Therefore, the pros and cons of permanent magnet machine performance, a direct impact on the running quality of hydro-generating units. At present, China’s hydropower station running machine permanent magnet machine, with the governor used by different, there are two types of structures: one for the permanent magnet machine with a liquid speed governor; the other for the induction of permanent magnet machine, power distribution fluid Governor. But no matter what kind of permanent magnet machine, they are based on the permanent magnet as a generator of the magnetic field. In order to prevent the magnetic field from weakening, after the factory installation, the power plant is in