Electric motor having an improved airflow cooling system

Details Electric motor having an improved airflow cooling system Electric motor having an improved airflow cooling system

1997-04-22

2000-01-04

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 52, 310 60R, 310 62, 310 63, 310DIG6, 310 68B, H02K 904, H02K 906

Patent

active

060113316

ABSTRACT:
An improved design for a switched reluctance motor is disclosed that keeps the motor cool during operation and thereby improves the performance and reliability of the motor. The improved design employs three centrifugal fans mounted to the motor shaft, which are used to create two independent airflow paths, one of which cools the electronic components of the motor. The improved design also divides the functions performed by a single printed circuit board into two circuit boards, an upper circuit board and a lower circuit board. Another feature of the improved design includes locating the position/speed sensing encoder immediately below one of the centrifugal cooling fans. The disclosed construction provides for increased dissipation of heat that is generated by the motor and its electronic components. In this configuration, the printed circuit boards and other electronic components are located in such a manner that air can be circulated in a path to remove heat from these components.

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Japanese Abstract 08-289505A, Ogake et al., Nov. 1, 1996.
Japanese Abstract 08-275483, Sugiyama et al., Oct. 18, 199.

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