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Method and device for braking an all-mains motor

  • US 6,094,023 A
  • Filed: 11/10/1998
  • Issued: 07/25/2000
  • Est. Priority Date: 05/10/1996
  • Status: Expired due to Fees
First Claim
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1. Method for electrical braking of an all-mains motor by means of an electric switching operation of the feed current supplied to the motor intended to cause a reversed rotary direction for a rotor of the motor, said method comprising:

  • monitoring whether or not a normal start operation of the motor has been performed when supplied feed current to the motor is interrupted, andonly performing a switching operation arranged to cause braking when an abnormal start sequence is being indicated, andcontrolling supplied braking power and reducing supplied braking power on a basis of successively reduced rotary speed of the motor until the rotor of the motor has substantially or completely ceased to rotate, where after supplied feed of braking current is interrupted.

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