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ac magnetic suspension using a differential feedback power amplifier

✍ Scribed by Shin-ichi Moriyama

Book ID
101293885
Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
246 KB
Volume
131
Category
Article
ISSN
0424-7760

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✦ Synopsis

This paper proposes a new type of magnetic suspension system in which the electromagnet is magnetized by an ac current. The basic idea is a feedback of difference between the exciting current and the applied voltage. The feedback signal is applied to a power amplifier through two phase shifters and a bandpass filter. The usefulness is established by experiments on magnetic suspension. The main merit of this system is that stable suspension is achieved without a displacement sensor and without a self-sensing controller.

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