 |
Charlotte Stonestreet
Managing Editor |
Editor's Pick
Precision pancake motor
28 March 2017
When oil and gas instrumentation specialist Hohner was developing a new test rig for its rotary encoders the company needed to incorporate a low profile motor that could perform precisely and repeatably at speeds of up to 6000rpm in an environmentally controlled enclosure at temperatures as low as -40˚C.
To meet this demanding specification the company turned to pancake motor specialists Printed Motor Works, who offered to customise their GN12LR printed armature motor. As well as providing very high torque from a thin profile, its use of rare earth NdFeB magnets enables this highly accurate motor to operate reliably at very low temperatures.
Customisations carried out by PMW included the use of low temperature adhesives and grease, and changes to the shaft to allow interchangeability of encoders.
"The modified motor has met all our requirements, and is enabling us to test our encoders quickly and precisely under all environmental conditions," said Patrick Blochle, managing director at Hohner.
Printed armature motors are ideal for applications such as these, since their design offers inherently high torque, rapid acceleration and zero cogging.
