A Low Power Brushless dc Motor.

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Abstract:

The Report describes a complete brushless dc motor of fractional horsepower which could be engineered to fulfil the majority of space motor roles. The Report deals primarily with a versatile active commutator which would have high reliability and efficiency, and which can be adapted to any type of permanent magnet rotor machine. The commutator is also designed to be compatible with various systems for controlling speed, torque and direction of rotation. Various windings and commutating systems are discussed to reduce the effect of cogging. Motor sizes from 08 to 15 have been developed. Typical size 11 performance figures are an efficiency of 60 at 14 watt shaft power at a speed of 2500 rpm. Author

Author(s):
Burton, G. E. ; Harrison, H. C.
Author Organization(s):
ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)
Descriptive Note:
Technical rept.,
Pagination:
0078

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
RAE-TR-68172
 Subject Terms
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
(*ELECTRIC MOTORS, DIRECT CURRENT), (*ELECTRONIC COMMUTATORS, ELECTRIC MOTORS), ELECTRONIC SWITCHES, GREAT BRITAIN
Field(s)/Group(s):
Electricity and Magnetism
Keyword(s):
DC MOTORS
Report Date:
1968 Jul 01