Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-05-31
2005-05-31
Lam, Thanh (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S089000
Reexamination Certificate
active
06900565
ABSTRACT:
The present invention is a electronic motor control apparatus designed for use in hazardous/classified environments, such as described in Article 500, Section 500.7 of the NFPA 70/National Electrical Code. The invention comprises a third party approved (i.e., UL Listed, UL Classified, CSA Certified, FM Approved, CE Approved) explosion-proof outer shell of aluminum, an interior controller, and a plurality of conductive plates to carry heat away from the interior controller to the external shell and environment. The controller may be an inverter or a solid-state device, and may be capable of variable frequency and voltage output. Interior and/or exterior cooling devices, such as fans, may be attached or adjacent to the apparatus to assist in heat dispersal. Interior air circulating booster fans may be installed inside the apparatus to increase internal air film coefficient, thus providing a maximized heat dissipative atmosphere. Exterior cooling devices rated to the area may be used to assist with maintaining the external air film coefficient and/or maximizing the thermal capabilities of the environment surrounding subject enclosure.
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patent: 2004/0102929 (2004-05-01), Evans
Airex Corporation
Lam Thanh
Law Offices of Karla Shippey
Shippey Michael A.
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