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High efficiency DC motor for demanding hydraulics applications

High efficiency DC motor for demanding hydraulics applications
A high efficiency DC motor for operation in hostile conditions has been developed by Astrosyn International Technology. The permanent magnet motor is intended to drive a hydraulic power pack for positioning the plough on a minefield clearance vehicle. 

Its intended location in a confined, hot environment and its high power output of 6.2kW meant that the motor's heat dissipation was a key consideration in its design. It is therefore fitted with a metal cooling fan and a slotted body area over its brush gear. A thermal sensor and thermal cut-out are also incorporated. Its high efficiency design, with low losses and a low input current, is also important in minimising heat output.

A hollow shaft enables the motor to be close coupled with the hydraulic pump. The motor uses rare-earth permanent magnets and low-loss lamination steel, with novel designs for its construction and windings. 

Operating from an 18-32V DC supply, the motor is designed to be powered from a motor vehicle, and its rugged construction makes it ideal for use in defence and other demanding applications.
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