Servo Motor control

[picstudent]

I am totally new to servo motors.
My new task is to control a spindle rotation. part of a machinery.
Client says AC servo 1.5Kw/1500rpm is needed for the task.

I have seen and used small dc servos for robotics application where a special pulse sequence is used to control the servo.

But in this case AC servo of this much torque I have no idea about the implementation.

There seems a part called servo amplifier in these systems. I think it is the AC drive circuitry for the motor coils. right?
A servo to be digitally controlled here means we need to build that amplifier systems also? or that circuitry is a part of motor? We need to give the digital control signals to drive and take feed backs?

How is the overall implementation.
I need to have a good idea before next discussion.
Thank you
Roy

 

[KMoffett]

Roy,

I think you will find designing, building, and testing will cost more than an off the shelf solution. Is a motor already spec'd...other than "AC servo 1.5Kw/1500rpm"?
Try Googling: AC servo controller drive
Start looking at companies and the spec's on their systems. This should give you questions to ask in the next discussion with your customer.

Ken

 

[mbarazeen]

variable frequency drive (VFD) are used to control the speed of AC motors, i hope you can find some model in the market that can have a feed back input, may be you can find compatible input sensors too with the same model.

in worse case you can modify an existing VFD that is having a potentiometer control (analogue) by driving a small DC servo motor fixed to the control knob.