- Joined Apr 2, 2007
i need to know why exactly does torque remains constant (or is proportional)
to V/Hz ratio?
to V/Hz ratio?
Power dissipated is directly releated by the loading. If there is more load, the motor will turn slower and the back EMF will be reduced and therefore the applied voltage doesn't have as much reverse voltage holding it back. This will cause a current increase on the input until the system stabilizes back near the original frequency but at a higher power dissipation. It also depends on whether you are talking about a synchronous motor or and inductance motor which is torque regulated through it's slip speed.thanks for the reply,
i m consfused
for more voltage the current shud decrease for same voltage (ac motors are like transformers)
isnt this why undervoltages are said to be dangerous since current draw increases IIRC.
but may be the load isnt constant in my case only torque is constant.
and what about frequency?
i was thinking along the lines that
speed prop to frequency
power prop to voltage?????????????
but my books tell me
power prop to sq (V)
and torque pro to sq(V) / speed.
|Thread starter||Similar threads||Forum||Replies||Date|
|10 kilo ohms at base with ground connected. 5 kilo ohms at emitter with \-5 volts. 5 kilo ohms is connected in parallel at collector current with 5 k||Homework Help||2|
|S||IR receiver extend no volts||Digital Design||49|
|R||Back EMF Volts Available From Inductors Circuit??||General Electronics Chat||10|
|Speaker cable for 3000 volts||General Electronics Chat||4|
|T||capacitance calculation of 60 hertz at 6.5 volts||General Electronics Chat||2|
|10 kilo ohms at base with ground connected. 5 kilo ohms at emitter with \-5 volts. 5 kilo ohms is connected in parallel at collector current with 5 k|
|IR receiver extend no volts|
|Back EMF Volts Available From Inductors Circuit??|
|Speaker cable for 3000 volts|
|capacitance calculation of 60 hertz at 6.5 volts|
by Jeff Child
by Jake Hertz
by Duane Benson