ディザを用いたリニア直流モータの駆動特性の改善 [in Japanese] Improvement of driving characteristics of the Linear DC Motor Used for the Dither [in Japanese]
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In one of the methods for reducing of the coulomb friction force, a method for adding a dither to the driving current of the motor is proposed. However, how amplitude and frequency of a dither should be selected, has be not made to be being enough clear. In this paper, a dither is used for the drive of linear DC motor in order to realize smooth start up and stop in the low-speed region. As the result, following matters became clear.<br>1. The dither frequency is mainly dependent on the electrical time constant of exciting coil.<br>2. If the dither current equal to 50% of main current is added, 36% of the positioning error can be reduced.
- IEEJ Transactions on Sensors and Micromachines
IEEJ Transactions on Sensors and Micromachines 119(4), 552-553, 1999-04
The Institute of Electrical Engineers of Japan