{"id":673,"date":"2026-04-01T09:36:00","date_gmt":"2026-04-01T00:36:00","guid":{"rendered":"https:\/\/www.muratasoftware.com\/en_wacul_new\/fwp-new-wacul\/?post_type=case&p=673"},"modified":"2026-08-24T16:40:43","modified_gmt":"2026-08-24T07:40:43","slug":"luv003","status":"publish","type":"case","link":"https:\/\/www.muratasoftware.com\/en\/case\/luv003\/","title":{"rendered":"Efficiency of Generator Motor (2)"},"content":{"rendered":"\n
General<\/th>Analysis model is comprised of a high power generator motor (HPGM) and a turbo charger generator (TCGM). The power is transferred through an inverter.<\/th><\/tr><\/thead>
Analysis Model<\/td>The generator motor turbo system is as shown in the Fig 1.
At a high speed driving, the TCGM generates the power and drives HPGM. At a lower speed driving, the HPGM generates the power and drives TCGM.<\/td><\/tr>
Result<\/td>To increase the efficiency of the HPGM, the tooth width was increased so as to reduce the magnetic flux density, and eventually reduce the iron loss (See Fig 2 and Fig 3). The coil turns remain unchanged. Fig 4 and Fig 5 are contour diagrams of the magnetic flux density.
The efficiency was improved by 0.4% from 96.7% to 97.1%.This improvement, though seemingly small, is a great contribution to the efficiency improvement as it is difficult to design a cooling system for a motor generator in severe thermal environment.<\/td><\/tr>
Keywords<\/td>Motor Generators, Motor Efficiency Improvement, Motor Loss Analysis<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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Fig 1. Generator Motor System<\/p>\n\n\n\n

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Fig 2. Original TCG Model<\/p>\n\n\n\n

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Fig 3. Improved TCG Model<\/p>\n\n\n\n

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Fig 4. Magnetic Flux Density of Original TCG Model<\/p>\n\n\n\n

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Fig 5. Magnetic Flux Density of Improved TCG Model<\/p>\n\n\n\n

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