DocumentCode :
806249
Title :
Analysis of corona motors and micromotors by means of effective gap conductivity
Author :
Krein, Philip T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Volume :
31
Issue :
4
fYear :
1995
Firstpage :
752
Lastpage :
760
Abstract :
Corona motors are of possible interest in miniature applications because of their insensitivity to material properties and their ability to produce torque with DC excitation. These motors act through repulsive forces, and can be built in self-levitating arrangements to minimize friction. The nonlinear electrical characteristics are modeled through Fourier analysis of the stator input voltage and current waveforms. An equivalent gap conductivity is defined, and used to provide a linearized model of the charge and field distributions at the rotor surface. The analysis helps explain how a corona motor generates high speeds with DC excitation, and points out the basis for its asynchronous operation. Experimental tests of a macroscopic motor confirm that the model successfully describes the basic behavior of a corona motor. Operation of a small (100 μm) cylindrical motor is considered through simulation. Such a device is expected to be capable of very high speeds with DC input and no special control
Keywords :
Fourier analysis; Fourier transforms; electric charge; electrical conductivity; machine theory; micromotors; rotors; simulation; 100 mum; DC excitation; Fourier analysis; asynchronous operation; charge distribution; corona motor; corona motors; equivalent gap conductivity; field distribution; friction minimisation; gap conductivity; macroscopic motor; micromotors; nonlinear electrical characteristics; repulsive forces; rotor surface; self-levitating arrangements; stator input current; stator input voltage; torque production; Conductivity; Corona; DC motors; Electric variables; Friction; Material properties; Micromotors; Stators; Torque; Voltage;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/28.395284
Filename :
395284
Link To Document :
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