Design of a permanent magnet synchronous motor integrated in the wheel rim on wheelchairs

Nilssen, Robert; Skaar, S.E.; Lund, Russell A.; Skjellnes, T.; Øvrebø, Sigurd; Lovli, E.

doi:10.1109/epe.2005.219584

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…Some other disadvantages are improper function, high cost, difficulties of fine-tuning (trimming) and modification since these existing products are largely relying on the motion controller produced by [1][2]. With regards to the academic researches, the studies on EW have been grown up [3][4][5][6][7][8][9]. Nonetheless, researches on ESW have been few.…”

Section: Introductionmentioning

confidence: 99%

Realization of an FPGA-based Motion control system for electric standing wheelchairs

Kung

Huang

et al. 2011

2011 IEEE Symposium on Industrial Electronics and Applications

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With the characteristics of convenience and mobility, electric standing wheelchairs (ESW) enable patients to freely move and stand up. Being extensively utilized, electric wheelchairs have already been one of the indispensable medical rehabilitation devices. Without doubt, the increase of standing function on electric wheelchairs would be further beneficial to patients. The controller system of the ESW is mainly based on the SoPC (System on a Programmable Chip) constructed by FPGA (Field Programmable Gate Array) and one Nios II processor produced by Altera company. The electric wheels are built up by two DC rim motors while the standing frame is composed of a linear motion mechanism and a parallel four-bar linkage mechanism. The motion controller IC is realized by PDL with the function of standing frame and two DC rim motors' speed control. The controller of standing frame consists of one motor drive and four channels of PWM (Pulse Width Modulation) signal outputs. Therefore, the necessary all digital drive controller of ESW is realized in one FPGA. This ESW enable not only the two-wheel machine to locate, synchronize, turn left or right, move forward or backward, brake and stop, but also the standing frame to lift and fall. Finally, this work completes one experiment system including a FPGA board, three converters, one two-wheel drive standing wheelchair platform that further evidences both the effectiveness and accuracy of the FPGA-based motion controller for ESW.

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Section: Introductionmentioning

confidence: 99%

Realization of an FPGA-based Motion control system for electric standing wheelchairs

Kung

Huang

et al. 2011

2011 IEEE Symposium on Industrial Electronics and Applications

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“…For instance, the high-priced motion controllers like PG Drives Technology [1] produced by United Kingdom or the Dynamic controller[2] produced by New Zealand make the production cost too high for the public to afford. Nowadays, the academic researches on electric wheelchairs have been grown up [3][4][5][6][7][8][9][10]; however, these researches still have some drawbacks. For example, the often used DC motors as the actuators for electric wheelchairs might cause the electric wheelchairs heavy and bulky.…”

Section: Introductionmentioning

confidence: 99%

Realization of a motion control IC for electric-powered wheelchair

Kung

Wang

Yang

2010

2010 8th IEEE International Conference on Industrial Informatics

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This work is mainly to implement a motion control IC for electric wheelchair based on the novel FPGA (Field Programmable Gate Array) technology, which a Nios ll soft core processor can be embedded into FPGA to construct an SoPC (System on a Programmable Chip) environment. This electric wheelchair herein is driven by two DC rim motors and a fuzzy controller is applied in speed loop of each motor drive to cope with the system uncertainty and external load problems. The motion control IC has two modules. One is Nios II processor IP (Intelligent properties) which is used to perform the function of motion trajectory for electric-powered wheelchair and the data communication with control panel; and the other is an application IP which is utilized to execute the function of PWM (Pulse width modulation) generation, QEP (Quadrature encoder pulse) signal detection, and speed loop fuzzy controller for two DC rim motors. Therefore, a fully digital motion controller for electric wheelchair can be realized within one FPGA chip. Finally, an experimental system, which is composed of the DE2 (CycloneII EP2C35F672C6) with FPGA basis, two inverters, and one platform for electric wheelchair, is set up to prove the efficiency and correctness of the proposed motion control IC.I.

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“…In fact, slotless AFPM machines proved to be particularly suitable for low-speed high-torque applications and, as in comparison with other machine topologies they allow direct drive motor designs which result in higher lightness and compactness of the machine. The use of AFPM wheel motors in wheelchair traction drives allows substantial improvement of drives overall efficiency and reduction of power consumption thereby [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Low-voltage Fed Encoderless Motor Drive Devoted To Wheelchairs For A Sustainable Mobility

Lidozzi¹,

Serrao²,

Solero³

et al. 2007

Eletrônica de Potência

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This paper reports the results achieved through the development of a prototype of electric wheelchair having direct-drive motors being housed within the wheel rims and designed to achieve performance as required for such a particular 24 V battery-operated vehicle application. The main levels of innovation of the realized prototype are described: the design and construction of two twin AFPM wheel-motor drives; the design and modeling of controllers together with the regulators tuning; the design and realization of the power conversion section; the development of a back-EMF-based method in conjunction with Hall-effect sensors to estimate rotor speed and position. Then, EMC characterization of the electric wheelchair is presented.

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Design of a permanent magnet synchronous motor integrated in the wheel rim on wheelchairs

Cited by 7 publications

References 17 publications

Realization of an FPGA-based Motion control system for electric standing wheelchairs

Realization of an FPGA-based Motion control system for electric standing wheelchairs

Realization of a motion control IC for electric-powered wheelchair

Low-voltage Fed Encoderless Motor Drive Devoted To Wheelchairs For A Sustainable Mobility

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