Overview
Motors are the power source that is incorporated into a system like eAxle, and the torque and electromagnetic force (excitation force) generated by the motor is transferred through the shaft and stator to the system. The torque and electromagnetic force transmitted to the system can be branched and damped and show different frequency characteristics depending on how the motor is incorporated into the system. Therefore, it is important to evaluate the system-level response from the motor design stage to reduce design man-hours and prevent design problems at the system design state.
Fig. 1 Motor and gearbox geometry and response point location
A geometry parametric study of is performed for a gearbox with an integrated motor, using the system-level vibration response as the evaluation index. Three design alternatives for the motor were chosen with the slot opening width as a design variable: 1.0 mm, 1.5 mm, and 2.0 mm.
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