A single phase ac induction motor has two windings, one is a run winding and the other is called a start winding. Strat winding can only work for a very short time to avoid overheated. A _____________ switch is installed inside motor to disconnect the strat winding when the motor speed reached 75% RPM.
举一反三
- 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
- For 3-winding transformers, when we do the short circuit test, we can measure from winding 3, with winding 1 shorted and winding 2 open, then can get leakage impedance Z13 value. ( <br/>)
- When a phase winding of a resolver carries alternating current, the amplitude of magnetic density at each point in the air-gap is produced by the winding changes in ______ distribution at certain instant.
- winding winda. We plan to _____________ our way southeast.b. The narrow _____________ path was very dangerous.