Learning Forum

[Sampath kumar A V N]

In motor, I am simulating for the performance characteristics of induction motor.in the efficiency plot I am getting a different plot at a higher speed.

[Rob]

What do you add into the model as boundary conditions etc? Higher speed means more power, but also (possibly) better heat transfer for cooling, and more drag on the moving parts. If you say which solver you're using I can move this to the correct physics group too.

[Sampath kumar A V N]

I am very much thankful for the reply sir....I am using motorCAD tool for simulation

[Sampath kumar A V N]

I am very much thankful for the reply. I am simulating the motor in the MotorCAD software tool. In MotorCAD may I know how to check for solver details

[kkimiabe]

Dear Sampa The difference between Motoring and Generating mode efficiency is a real-life difference, and is due to the opposite direction of the power flow, hence the current, in your equivalent EMachine circuit. To visualize this better, you can analyze the equivalent circuit model of your IM design (the circuit parameters are available in Motor-CAD EMAG module under the OUTPUT tab)and compare the input and output power for the motoring and generating modes by simply reversing the direction of the current, whilst keeping the terminal voltage polarity fixed. Depending on your RL circuit parameters, the difference of efficiency can be minor or major. Please let us know if this clarifies. Kind regards. Kia

[Prashant M. P]

Hi, I'm trying to simulate battery thermal runaway by mechanical abuse, but i am getting this in console while simulating, need suggestions on how to overcome this problem. 

Updating solution at time level N...

done.

 

iter energy uds-0 uds-1 time/iter

11820 8.0448e-17 1.0015e-15 7.0804e-12 0:01:51 20

ida_check_flag<0! in p2d function

 

ida solver failed when calling echem submodel in a normal call: Vp=0.000000 Vn=0.000000

ida_check_flag<0! in p2d function

 

IDA returns error code: -14 11821 1.1303e-07 5.9998e-13 3.9534e-09 0:01:48 19

ida_check_flag<0! in p2d function

 

ida solver failed when calling echem submodel in a normal call: Vp=0.000000 Vn=0.000000

 

IDA returns error code: -14 11822 2.1652e-12 4.6339e-13 3.0591e-09 0:01:43 18

ida_check_flag<0! in p2d function

 

ida solver failed when calling echem submodel in a normal call: Vp=0.000000 Vn=0.000000

 

IDA returns error code: -14 11823 5.1477e-14 2.5213e-13 1.6627e-09 0:01:38 17