A new robust control strategy for axial flux permanent magnet motor applied on legged lunar robots

Legged robots have the advantage of strong terrain adaptability in lunar exploration. A new robust controller is designed for axial flux permanent magnet motors applied on the legged lunar robots to diminish the disturbance from uncertainty and external circumstance. The theoretical verification is carried out through Lyapunov stability theory. The numerical simulation and real-time experiment are carried out to access the stability and dynamic property of the systems adopting the proposed controller. The results are compared with the traditional control strategies to demonstrate the advantages of the proposed controller. The new robust controller contributes to the dynamic stability of legged lunar robots and is also appropriate for the similar mechanical systems.

Download Full-text

Improved SVPWM Fault-Tolerant Control Strategy for Five-Phase Permanent-Magnet Motor

Energies ◽

10.3390/en12244626 ◽

2019 ◽

Vol 12 (24) ◽

pp. 4626 ◽

Cited By ~ 2

Author(s):

Liang Xu ◽

Wenxiang Zhao ◽

Guohai Liu

Keyword(s):

Permanent Magnet ◽

Control Strategy ◽

Pulse Width Modulation ◽

High Efficiency ◽

Fault Tolerant ◽

Control Strategies ◽

Fault Tolerant Control ◽

Open Circuit ◽

Permanent Magnet Motors ◽

Permanent Magnet Motor

Multiphase permanent-magnet motors have received a lot of attention in the past few years owing to the merits of high power density, high efficiency and high fault-tolerant capability. Particularly, high fault tolerance is very desirable for safety-critical applications. This paper proposes an improved space vector pulse-width modulation (SVPWM) fault-tolerant control for five-phase permanent-magnet motors. First, generalized five-phase SVPWM fault-tolerant control is deduced and analyzed based on single-phase open-circuit fault, thus obtaining various SVPWM fault-tolerant control strategies and yielding a greatly increased capacity to enhance fault-tolerant performance of motor. Then, an improved SVPWM fault-tolerant control strategy with increased DC bus voltage utilization and reduced current harmonics is proposed and compared with the traditional one. Last, effectiveness and superiority of the proposed control strategy is verified by both simulation and experimental results on a five-phase permanent-magnet motor.

Download Full-text

Optimization of Magnets Shape for Cogging Torque Reduction in Axial-Flux Permanent Magnet Motors

IEEE Transactions on Energy Conversion ◽

10.1109/tec.2021.3068174 ◽

2021 ◽

pp. 1-1

Author(s):

Vicente Simon-Sempere ◽

Auxiliadora Simon-Gomez ◽

Manuel Burgos ◽

Jose-Ramon Cerquides-Bueno

Keyword(s):

Permanent Magnet ◽

Permanent Magnet Motors ◽

Axial Flux ◽

Cogging Torque

Download Full-text

A New Harmonic Current Injection Technique to Reduce Cogging Torque in Axial Flux Permanent Magnet Motors

IEEE Transactions on Magnetics ◽

10.1109/tmag.2021.3087460 ◽

2021 ◽

pp. 1-1

Author(s):

M. Tetik Girgin ◽

M. K. Guven ◽

M. Aydin

Keyword(s):

Permanent Magnet ◽

Current Injection ◽

Injection Technique ◽

Permanent Magnet Motors ◽

Axial Flux ◽

Harmonic Current ◽

Cogging Torque

Download Full-text

Analysis of a Tubular Linear Permanent Magnet Motor for Reciprocating Compressor Applications

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.2114 ◽

2013 ◽

Vol 448-453 ◽

pp. 2114-2119 ◽

Cited By ~ 3

Author(s):

Izzeldin Idris Abdalla ◽

Taib Ibrahim ◽

Nursyarizal Mohd Nor

Keyword(s):

Permanent Magnet ◽

Permanent Magnets ◽

Outer Radius ◽

Design Parameters ◽

Reciprocating Compressor ◽

Permanent Magnet Motors ◽

Permanent Magnet Motor ◽

Element Analysis ◽

Split Ratio ◽

Single Coil

This paper describes a design optimization to achieve optimal performance of a two novel single-phase short-stroke tubular linear permanent magnet motors (TLPMMs) with rectangular and trapezoidal permanent magnets (PMs) structures. The motors equipped with a quasi-Halbach magnetized moving-magnet armature and slotted stator with a single-slot carrying a single coil. The motors have been developed for reciprocating compressor applications such as household refrigerators. It is observed that the TLPMM efficiency can be optimized with respect to the leading design parameters (dimensional ratios). Furthermore, the influence of mover back iron is investigated and the loss of the motor is computed. Finite element analysis (FEA) is employed for the optimization, and the optimal values of the ratio of the axial length of the radially magnetized magnets to the pole pitch as well as the ratio of the PMs outer radius-to-stator outer radius (split ratio), are identified.

Download Full-text