Motor Identification (AC or DC)

Tallat Ghazi · Dec 2, 2018

Hi,
I am not an expert in Electrical terminologies. Can anyone please translate and confirm me following:
1- Will it be suitable to use Motor (attached image) with CURTIS AC MOTOR CONTROLLER 1236-5401. This CURTIS Motor controller supports AC Induction (36v/48v max 450A) motor.
2- Is Motor (attached image) AC or DC or something DUAL.
3- Why on striker of Motor (attached image) its showing DC:48v as well as AC Motor?

Thanks!

[ElectriciansForums.net] Motor Identification (AC or DC)

LeeH · Dec 2, 2018

Probably a servo motor. The DC will be for the encoder.

PEG · Dec 2, 2018

Hi,can you tell us what the motor is/will be driving?

marconi · Dec 2, 2018

I think for questions 2 and 3:

question 2 - the motor is a 3 phase ac motor not a dual ac or dc motor.

question 3 - the reference to 48 V dc is because this motor can be disconnected from the ac supply - which will stop it motoring - and a dc supply connected so as to flow through 1 or 2 of the three stator windings - which will then provide dc injection braking (and the ability to hold the rotor still (or lock it) in the case of a permanent magnet rotor)- but only for a time determined by its thermal rating because the Ohmic heating in the windings is high.

By injecting a dc current into the stator, a stationary (with respect to the motor casing) magnetic field is produced. The spinning rotor windings, cutting through this stationary stator field, have induced currents in them which from Lenz's Law produce a stationary rotor magnetic field which opposes the stator field - thus a static torque is applied to the rotor which acts as a brake on it as its rotation slows to a standstill.

The integral speed (rotor rotation)) sensor is required by the motor controller to control not only motoring but braking.

I am not familiar with the Curtis controller but when I googled it and looked at the literature - it looks promising as a controller for the motor but I don't know for sure.