Study on Miniaturization of an Air-Cooled Inverter Integrated with Motor

Paper #:
  • 2014-01-1872

Published:
  • 2014-04-01
Citation:
Yoshida, H., Nakayama, H., Mizukoshi, Y., and Asahara, Y., "Study on Miniaturization of an Air-Cooled Inverter Integrated with Motor," SAE Technical Paper 2014-01-1872, 2014, https://doi.org/10.4271/2014-01-1872.
Pages:
5
Abstract:
This paper reports about a trial for miniaturization of an air-cooled inverter integrated with motor, which is realized by reduction of the total volume of smoothing capacitor. An integrated system prototype was constructed with a disk-shaped inverter positioned at the rear end of the motor. We examined the possibility of using a ceramic capacitor, which features a higher heat-resistance temperature, lower internal resistance and higher capacity density than a film capacitor. At the same level of capacitance, the volume of a ceramic capacitor is less than one-half that of a film capacitor, enabling the size of the smoothing capacitor to be reduced to approximately one-fifth that of the currently used device. A suitable circuit configuration and physical layout of distributed smoothing capacitors and corresponding power device modules are proposed and demonstrated.
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