Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-09-28
2009-11-17
Hanh, Nguyen N (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S156210
Reexamination Certificate
active
07619341
ABSTRACT:
A stainless plate is attached to overlie a magnetic steel plate. An upper portion of a through-hole for inserting a magnet is covered with the stainless plate. Thereby, adhesion between the magnetic steel plate and an end plate with an adhesive for fixing a permanent magnet is prevented. Since an amount of thermal expansion and thermal shrinkage obtained as a result of cooling and heating the stainless plate is closer to an amount of thermal expansion and thermal shrinkage of the magnetic steel plate than to an amount of thermal expansion and thermal shrinkage of the end plate, stress imposed on the magnetic steel plate is reduced as compared to a conventional case. Consequently, fatigue breakdown of the magnetic steel plate due to a difference in linear expansion coefficients of the end plate and the magnetic steel plate is prevented. Thereby, a rotating electric machine having a rotor core portion with improved reliability can be provided.
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Hanh Nguyen N
Kenyon & Kenyon LLP
Toyota Jidosha & Kabushiki Kaisha
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