【单选题】What is a key characteristic of a permanent magnet alternator? A. Permanent magnet stator B. Permanent magnet rotor C. Permanent magnet rotor and stator D. The use of a strong NIB magnet

By the use of a ( ) and brushes, voltage is taken from the rotor. A: commutator B: rotor C: stator D: magnet

In typical induction motors, the stator winding is connected to the source and the rotor winding is short-circuited for many applications, or may be closed through external resistances. Herein, we can also call “stator winding” and “rotor winding” the ( ) respectively. A: armature winding and field winding B: field winding and armature winding C: motor D: stationary

In typical induction motors, the stator winding is connected to the source and the rotor winding is short-circuited for many applications, or may be closed through external resistances. Herein, we can also call “stator winding” and “rotor winding” the ( ) respectively. A: field winding and armature winding B: armature winding and field winding C: armature winding D: field winding

100%<br/>Protection for generator stator single phase earth fault() A: zero<br/>sequence voltage protection B: third<br/>harmonic voltage protection C: zreo<br/>sequence current

The magnetic field of the dynamo or alternator can be provided by either electromagnets or permanent magnets mounted on either the rotor or the stator. A: 通过安装在转子或定子上的电磁铁或永磁铁，可以形成直流发电机或交流发电机所需的磁场。 B: 通过被安装在转子或定子上的电磁铁或永磁铁，可以形成直流发电机或交流发电机所需的磁场。 C: 通过被安装在转子或定子上的电磁铁或永磁铁，我们可以形成直流发电机或交流发电机所需的磁场。 D: 通过被安装在转子或定子上的电磁铁或永磁铁，可以提供直流发电机或交流发电机所需的磁场。