# Home > Motion-Control > Motor DC

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**Topic under **Motor DC

**Source:** deepblue.lib.umich.edu

**File size:** **5.78 MB**

**File type:** **pdf**

**Last download on:**
Sun Feb 18, 2018 02:32:59 PM

__Short Desciption__:

Electric motors are a fundamental component in almost all industries. It is known that
electric motors consume about 60% of the electrical energy produced in industrialize
nations [1]. Recently, electric motors have attracted more attention as automakers prepare
for the mass production of electric vehicles. Despite a long history of research on electric
motors, there still remains room to enhance the motor performance. As noted by
Mitsuhiko Yamashita, Executive Vice President of Nissan Motor Co., Ltd [2] , “Motor
technology is very old. There has been no big progress recently because people didn’t
pay much attention to motor technology”.

__Summary__:

This research presents an approach to find the optimal geometry for improving
performance of electric motors. The performance of electric motors can be improved by
two ways: a) by changing their geometry, and/or b) by modifying their control scheme.
Contrary to a vigorous research effort on control optimization, more research to find the
optimal geometry remains. In this research, we aim to fully investigate a structural
topology optimization approach to magnetic fields, which can identify ways to change
2
the geometry of high performance electric motors. Among various motor performances,
we mainly focus on the force/torque density which can be enhanced by maximizing the
force/torque with the minimum amount of mass. The magnetic force/toque is calculated
numerically using the finite element method with various calculation methods. To
investigate the characteristics of magnetic force/torque with respect to its geometry or
material property, the magnetic actuator is optimized as a basic study. By examining
optimization results, the properties of magnetic circuit parameters such as nonlinear
permeability, geometry, and mass are investigated. From this basic study, we seek a
guideline to design the magnetic circuit of electric motors that improve the force/torque
performance.

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"STRUCTURAL DESIGN OPTIMIZATION OF ELECTRIC MOTORS TO IMPROVE TORQUE PERFORMANCE"

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