Through-Hole Contactless Slipring System Based on Rotating Magnetic Field for Rotary Applications

Contactless slipring system based on inductive power transfer is a preferable alternative to mechanical slipring assemblies. They are designed to deliver required output power to a rotary shaft without direct electrical contacts. The current single or multiple-unit through-hole single-phase systems...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2014-11, Vol.50 (6), p.3644-3655
Main Authors: Abdolkhani, Ali, Hu, Aiguo Patrick, Covic, Grant A., Moridnejad, Mahsa
Format: Article
Language:English
Subjects:
Balancing
Coils
Contacts
Couplings
Electric power generation
Inductance
Joining
Magnetic fields
Magnetic flux
Power transfer
Rotating
Shafts
Shafts (power)
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Summary:Contactless slipring system based on inductive power transfer is a preferable alternative to mechanical slipring assemblies. They are designed to deliver required output power to a rotary shaft without direct electrical contacts. The current single or multiple-unit through-hole single-phase systems often have limited power transfer capability within a confined physical space; thus, they may not be able to meet the load requirement for certain applications such as wind power pitch control. This paper presents an integrated polyphase through-hole contactless slipring system by generating a rotating primary magnetic field coupled with balanced power pickups at the secondary side with zero mechanical driving torque on the shaft. A new index termed "mutual inductance per pole" is introduced to simplify the analysis of the mutually coupled polyphase system to a single-phase basis. Simulation and practical experiments have demonstrated that, with the same physical size, the proposed contactless slipring setup can transfer 55% more power compared with the existing single-phase counterpart.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2014.2312998