초록 ▼

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 airflo

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.

대표청구항 ▼

[ What is claimed is:] [1.] An electric motor, comprising:(a) a stator having a plurality of stator poles;(b) a rotor having a shaft and a plurality of rotor poles, said rotor being rotatably disposed within said stator, said rotor being supported by a support frame defining sidewalls;(c) at least o

[ What is claimed is:] [1.] An electric motor, comprising:(a) a stator having a plurality of stator poles;(b) a rotor having a shaft and a plurality of rotor poles, said rotor being rotatably disposed within said stator, said rotor being supported by a support frame defining sidewalls;(c) at least one fan mounted to the shaft for directing an airflow into said motor through an entrance port; and(d) a circuit board disposed within said motor in proximity to said entrance port and said sidewalls, such that airflow is directed radially over said circuit board in a first direction generally transverse to an axis defined by the shaft, and then in a direction along said sidewalls generally parallel to the axis defined by the shaft to dissipate heat generated by electronic components associated with said circuit board.