1985-02-01

Permanent Magnet Geared Starters 850377

A range of 4 pole ferrite magnet reduction gear starters is described with outputs of 1.0 kW, 1.4kW and 1.7 kW. These show substantial weight savings by comparison with present direct drive wound field starters. High intrinsic energy ferrite segments with innovative pole shields provide a high resistance to demagnetisation.
For lower power outputs, new designs of woundfield, direct drive starters provide the best cost/performance/weight compromise, geared ferrite magnet starters being lighter but too expensive. Direct drive ferrite magnet designs have inadequate stall torque to deal with hot starting problems.
The influence of Neodymium-Iron-Boron permanent magnets on starter design is discussed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X