High power low RPM D.C. motor

Details High power low RPM D.C. motor High power low RPM D.C. motor

1998-06-01

2000-03-14

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68R, 310181, 318439, H02K 100

Patent

active

060376929

ABSTRACT:
A high power low RPM direct current electric motor is disclosed whereby the high power output is achieved in one of two ways or both. In the first case, the need for cooling is reduced simultaneously along with an increase in the utilization of the magnetic field present in the motor permanent magnets. This is achieved by wrapping the electromagnet core with windings that are capable of demagnetizing the rotor permanent magnets under stall conditions. Interlocking motor circuitry is provided which prevents the full activation of these motor windings until motor RPM values reach a safe level. This increases motor power while decreasing resistive losses in electromagnet windings. In the second case, the rotary portion consists of a large diameter relatively flat rotor containing permanent magnets and having built in vanes for moving air over the electromagnet stator windings providing forced air cooling.

REFERENCES:
patent: 3686524 (1972-08-01), Hall
patent: 3974406 (1976-08-01), Wehde
patent: 4015181 (1977-03-01), Karube et al.
patent: 4710667 (1987-12-01), Whiteley
patent: 5123079 (1992-06-01), Tanii et al.
patent: 5125067 (1992-06-01), Erdman
patent: 5179307 (1993-01-01), Porter
patent: 5696419 (1997-12-01), Rakestraw et al.

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