• 2021-04-14
    Does induction motor require a permanent magnet?
  • No.

    内容

    • 0

      The type of stepping motor widely used in industry is A: reactive B: permanent manget motor C: hybird motor D: variable reluctance motor

    • 1

      The magnentic field is generated by A: voltage applied to the conductor B: current through the conductor C: charge shifts D: permanent magnet

    • 2

      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.

    • 3

      What does a successful speaker require?

    • 4

      What does a successful speech require?