Q&A Forum
Hello guys
I am looking to build a dynamometer using an induction motor, VFD, and a brake resistor and I would appreciate any help to make sure there aren't anything I am missing out before I go for it.
The Dyno will be used for research purposes with an engine with the following specs:
Max. Power: 55kW
Top Speed: 4000rpm
Max. Torque: 185Nm
Speed at max. Torque: 1500rpm
Induction motor:
- 1500rpm rated speed, for minimizing slip and maximizing stable power output, and as the rotor speed need to exceed the synchronous speed to enter negative slip so the motor absorbs power.
- 29.06kW Power, P=T×ω, and current will be 56.7A (Voltage: 400 V, frequency: 50Hz, Power Factor: 0.85, Efficiency: 0.90).
Motor: 4-pole, 30kW or more, 1500rpm, 190nm or more.
VFD: 30kW but should have a flying start, and sensorless Vector Control options.
Braking resistor: 8Ω and 30kW rated, assuming duty cycle is going to be 100%.
Are these assumptions valid, or am I mistaken?!
Would it be dangerous to drive the motor at its full speed 4000rpm?
Thank you
I used to have a stand with a 55kW engine. Now I have a stand with Telma. I can share my experience and data. Or make a separate topic.
Hello Miroslav
I would appreciate your help!
How can I contact you?