A large number of experiments are performed to analyse the influence of the inverter type and the switching frequency on the audible noise, losses and overall efficiency in induction motor drives. Temperature measurements both in stator and rotor give an indication of the required derating, if any. Results for a standard design motor, consecutively supplied by a transistor based inverter and IGBT inverter are compared with the behaviour when the machine is directly connected to the mains. To analyse the influence of the rotor design, a special rotor with no current redistribution is constructed and mounted in a rewound stator. Higher switching frequencies have a large influence on audible noise and temperature, but the overall efficiency remains nearly constant. However the distribution of losses is influenced.
| Filename: | EPE Journal - 07-1-2 - 10 - Paper Belmans |
| Filesize: | 151.3 KB |
