240V PWM to control 120V DC shunt motor
240V PWM to control 120V DC shunt motor
(OP)
Hi,
We are studying the possibility of supplying with a 240V (mains) PWM signal, 50% duty cycle, a 120V/450W DC shunt motor. We are not experts on this area, so we are concerned about the possible damage that overvoltaging may cause in the windings.
Could anybody confirm if this approach will work, or if it will damage the motor?
Thanks!
We are studying the possibility of supplying with a 240V (mains) PWM signal, 50% duty cycle, a 120V/450W DC shunt motor. We are not experts on this area, so we are concerned about the possible damage that overvoltaging may cause in the windings.
Could anybody confirm if this approach will work, or if it will damage the motor?
Thanks!





RE: 240V PWM to control 120V DC shunt motor
RE: 240V PWM to control 120V DC shunt motor
RE: 240V PWM to control 120V DC shunt motor
Make sure you have a good protection if the controller gets mad and delivers 100 % - that will probably not be good for the motor.
Also, make sure your carrier frequency is high enough so you do not get excessive armature current ripple.
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: 240V PWM to control 120V DC shunt motor
We are still testing the best frequency, but seems that a value between 1KHz and 10KHz works fine.
RE: 240V PWM to control 120V DC shunt motor
RE: 240V PWM to control 120V DC shunt motor
RE: 240V PWM to control 120V DC shunt motor
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: 240V PWM to control 120V DC shunt motor
Yes, 340 VDC.
RE: 240V PWM to control 120V DC shunt motor
RE: 240V PWM to control 120V DC shunt motor
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: 240V PWM to control 120V DC shunt motor
RE: 240V PWM to control 120V DC shunt motor
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: 240V PWM to control 120V DC shunt motor
Thanks for the support