I'm going to assume you are referring to an AC Brushless Induction Motor, in other words a 3 phase motor with a permanent magnet rotor (armature), not a standard AC 3 phase induction motor. If so, the back EMF from the rotating armature is very substantial and shorting the motor phases at rated speed could damage the motor. If you want to decelerate the motor without using the VFD (variable frequency drive) you need to first disconnect the VFD T-leads from the motor, then connect an appropriately sized resistor bank across the motor T-leads. Without knowing a lot more (i.e. motor rating, deceleration delta-t, etc.) I can't estimate the resistor values.Hello! I'm trying to smoothly brake a three phase brushless motor, by short circuiting the phases. At this moment an overvoltage occurs damaging the power circuit. Is this the right way to do it? Thanks
by Aaron Carman
by Jake Hertz
by Jake Hertz
by Duane Benson