Insulating tape and production method thereof, stator coil and production method thereof, and rotating electric machine
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United States of America Patent
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Feb 5, 2019
Grant Date -
Nov 10, 2016
app pub date -
Nov 13, 2014
filing date -
Jan 29, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
An insulating tape having a mica layer, a reinforcing layer having a filler and a fiber reinforcing material laminated on the mica layer, and a cellulose derivative layer laminated on the reinforcing layer is provided. One or more hydroxyl groups in the glucose units of the cellulose derivative are substituted with a functional group such as —CH2CH2OH or —(CH2CH2O)pH (where p is any repeating number up to 50). The weight per unit area of the mica ranges from 100 g/m2 to 200 g/m2. The filler has a maximum particle size of 100 μm or smaller and a weight per unit area ranging from 10 g/m2 to 50 g/m2. The insulating tape is useful to form a stator coil insulating layer with high thermal conductivity, with no outflow of a filler to the exterior during production of the stator coil, and with enhanced bonding strength.
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