Speed- Torque Characteristics

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jasonthoe
Posts: 6
Joined: Wed Dec 08, 2010 9:14 pm

Speed- Torque Characteristics

Postby jasonthoe » Tue Jan 25, 2011 11:26 pm

Why is the safe operation line for AC Speed control Motors (Mss-W, US and ES01 & 02) INCREASES from lower to higher speed with increasing Torque? Shouldn't it be the other way round as in higher speed with lower torque? Thanks for the help

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omsupport1
Posts: 99
Joined: Thu Nov 19, 2009 10:34 am

Re: Speed- Torque Characteristics

Postby omsupport1 » Wed Jan 26, 2011 9:58 am

Jason,

In order to answer your question, we need to know that:
-Input power to a speed control motor varies with the load and speed.
-The greater the load, the greater the input power to the motor, which means the temperature rise of the motor will also be greater.
-In addition, the lower the speed, the greater the input power to the motor, which means the temperature rise of the motor will also be greater.

The safe operation line is determined by the motor temperature of the motor. By running the motor anywhere on or below the safe operation line, the motor can be run continuously (30 minutes maximum for a reversible motor).

So, the safe operation line has a rising slope because the speed control motors require more power, which means a higher temperature rise at the lower speeds.

Does this answer your question?
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jasonthoe
Posts: 6
Joined: Wed Dec 08, 2010 9:14 pm

Re: Speed- Torque Characteristics

Postby jasonthoe » Wed Jan 26, 2011 6:59 pm

Thanks a lot. This has been very helpful.

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omsupport1
Posts: 99
Joined: Thu Nov 19, 2009 10:34 am

Re: Speed- Torque Characteristics

Postby omsupport1 » Thu Feb 03, 2011 11:04 am

Glad we could help.
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paulwalker_92
Posts: 10
Joined: Sun Jul 10, 2011 5:12 am

Re: Speed- Torque Characteristics

Postby paulwalker_92 » Sun Jul 10, 2011 5:24 am

Thanks for the information. This is very helpful for me too.

aldoned
Posts: 32
Joined: Mon Sep 14, 2015 3:03 am

Re: Speed- Torque Characteristics

Postby aldoned » Mon Sep 14, 2015 3:03 am

:D :D :D :D


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