Also increase of resistance as the wire gets hot.
On 2024-08-15 12:53, James Pawson (U3C) wrote:
Hi John,
Thanks for the reply. Non linear response because of saturation of the
magnetic material?
All the best
James
James Pawson
Managing Director & EMC Problem Solver
*Unit 3 Compliance Ltd*
*EMC : Environmental & Vibration : Electrical Safety : CE & UKCA :
Consultancy*
www.unit3compliance.co.uk <http://www.unit3compliance.co.uk/> |
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/Office hours:/
/Every morning my full attention is on consultancy, testing, and
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/For inquiries, bookings, and testing updates please send us an email
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*From:*John Woodgate <[email protected]>
*Sent:* Wednesday, August 14, 2024 5:46 PM
*To:* [email protected]
*Subject:* Re: [PSES] Motor Locked Rotor and Overload Testing
The stalled motor is a non-linear load, so an RL circuit might not be
representative. For overload testing, we used a band-brake, but I
suppose a disc brake would be used now. You would need to plot the
torque versus hydraulic pressure curve to calibrate it.
On 2024-08-14 17:36, James Pawson (U3C) wrote:
Hi all,
We’ve had a few things in the lab recently requiring motor locked
rotor and motor overload testing.
Working on the principle that a locked rotor motor looks like a
short circuit (inductance and DC resistance of winding) would it
be reasonable to just substitute the motor with the equivalent
circuit?
For an overload testing (steadily increasing the load on the motor
drive until failure or trip) I’m not sure how best to practically
do this. How do people achieve these tests practically in the lab?
What equipment is used?
Any recommendations gratefully received.
All the best
James
James Pawson
Managing Director & EMC Problem Solver
*Unit 3 Compliance Ltd*
*EMC : Environmental & Vibration : Electrical Safety : CE & UKCA :
Consultancy*
www.unit3compliance.co.uk <http://www.unit3compliance.co.uk/> |
[email protected] <mailto:[email protected]>
+44(0)1274 911747 | +44(0)7811 139957
2 Wellington Business Park, New Lane, Bradford, BD4 8AL
Registered in England and Wales # 10574298
/Office hours:/
/Every morning my full attention is on consultancy, testing, and
troubleshooting activities for our customers’ projects. I’m
available/contactable between 1300h to 1730h Mon/Tue/Thurs/Fri./
/For inquiries, bookings, and testing updates please send us an
email on [email protected] or call 01274 911747. Our
lead times for testing and consultancy are typically 4-5 weeks./
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