Contactless power supply for magnetically levitated elevator systems

A contactless power supply (CPS) for the cabin of a magnetically levitated elevator is presented in this paper. In contrast to commercial stand-alone contactless power supply systems, a combined CPS and electromagnetic guiding system (MGS) is introduced. The inductive energy transmission is realized by utilizing the magnetic circuit of an actuator of the linear guiding. With this approach two devices are combined into one unit. The hybrid actuator consists of an omega shaped yoke, fabricated of soft magnetic composites (SMC), with permanent magnets and coils on its lateral arms. A concentrated primary winding is added to the guide rail and a coil wound around the central arm of the omega actuator functions as secondary winding. Hereby a superposition of the MGS flux and the CPS flux emerges in the magnetic circuit of the actuator and the transmission path is established. The proposed system requires less construction space and weight when compared to existing energy transmission systems.

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“…From no-load measurements the parameter of the inductance matrix are determined [15]. Table I compares the simulated and measured quantities.…”

Section: A Measurement Of the Inductance Matrixmentioning

confidence: 99%

“…The authors investigated a similar strategy in [15]. On the central arm of one of the guiding actuators, an additional coil is placed.…”

Section: Introductionmentioning

confidence: 98%

Contactless power supply for magnetically levitated elevator systems using a SMC hybrid actuator

Appunn

Hameyer

2014

2014 International Conference on Electrical Machines (ICEM)

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“…Schmülling et al presented multidegree guide position control of an overdetermined system by employing the pole placement method [11]. The elevator posture control using the maglev guiding system was experimentally evaluated by realizing a test bench operated by ropes [12] or linear synchronous motors [13]. Appunn and Hameyer also presented a combined unit of a maglev guiding system and a contactless power supply with the introduction of soft magnetic composites [14].…”

Section: Introductionmentioning

confidence: 99%

“…Unlike passenger elevators, in the wafer transport elevator, for wafer handling operations, the major components of the elevator, including the linear motor and maglev guiding system, cannot be placed on the front, left, or right sides of the elevator. Therefore, the maglev guiding system must be placed on the backside of the elevator, and thus there is inevitably eccentricity of the mass center from the actuating axis of the maglev guiding system (see the backpack-topology in [13]). Moreover, the lifting conditions are harsh, involving extremely high accelerations to maximize manufacturing capabilities.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Levitation Guiding System of a Ropeless Elevator for Semiconductor Wafer Vertical Transport: Experimental Evaluation

Ha,

Jung,

Park

et al. 2024

IEEE Access

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A novel design of a magnetic levitation (maglev) ropeless elevator for semiconductor wafer vertical transport is newly presented. To satisfy high cleanliness during vertical transport of the wafer, linear motor lifting and maglev guiding are desirable instead of the conventional rope lifting and wheel-based guiding method. Owing to the physically noncontact maglev guiding, particle-free and high-speed operation can be achieved with remarkable ride quality. In this paper, practical challenges for wafer transport, such as the eccentricity of the mass center from the actuating axis, severe acceleration/deceleration conditions as well as periodic large disturbances from normal forces of the linear motor, resonance of the elevator, and manufacturing tolerance of the guide rail, are further considered to satisfy the ride performance in wafer transport by designing a robust feedback controller with a loop shaping technique. A full-scale maglev ropeless elevator was constructed to experimentally validate the effectiveness of the proposed method. The experimental results demonstrated excellent magnetic levitation guiding performance in 5 degrees of freedom, with a maximum airgap fluctuation of 227 µm under harsh lifting conditions (V max = 2600 mm/s).

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“…Previous studies to minimize cost and space are based on an integrated solution of guiding and power transmission, where the same flux path is used for both operations [2]. An alternative topology, where two different materials are used for the guiding and power transmission system, is proposed in [3].…”

Section: Introductionmentioning

confidence: 99%

Modelling of non-linear losses in an integrated contactless power supply for magnetically levitated elevator systems using discrete circuit elements

Putri¹,

Appunn²,

Hameyer³

2015

Archives of Electrical Engineering

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A contactless energy transmission system is essential to supply onboard systems of electromagnetically levitated vehicles without physical contact to the guide rail. One of the possibilities to realise a contactless power supply (CPS) is by integrating the primary actuator into the guide rail of an electromagnetic guiding system (MGS). The secondary actuator is mounted on the elevator car. During the energy transmission, load dependent non-linear losses occur in the guide rail. The additional losses, which are caused by the leakage flux penetrating into the guide rail, cannot be modelled using the classical approach of iron losses in the equivalent circuit of a transformer, which is a constant parallel resistance to the mutual inductance. This paper introduces an approach for modelling the load dependent non-linear losses occurring in the guide rail using additional variable discrete circuit elements.

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Contactless power supply for magnetically levitated elevator systems

Cited by 5 publications

References 14 publications

Contactless power supply for magnetically levitated elevator systems using a SMC hybrid actuator

Contactless power supply for magnetically levitated elevator systems using a SMC hybrid actuator

Magnetic Levitation Guiding System of a Ropeless Elevator for Semiconductor Wafer Vertical Transport: Experimental Evaluation

Modelling of non-linear losses in an integrated contactless power supply for magnetically levitated elevator systems using discrete circuit elements

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