Design and Optimization of a New Magnetic-Geared Pole-Changing Hybrid Excitation Machine

Zhao, Xing; Niu, Shuangxia

doi:10.1109/tie.2017.2716879

Cited by 59 publications

(21 citation statements)

References 22 publications

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“…λ 2k is the amplitude of the 2kth harmonic permeability, λ 2k = (4/π)∫ 0 π/2 λ δ (θ)cos(2kθ)dθ, and k is the positive integer. According to (2) and 3…”

Section: Excitation Principle Of Hepmsgmentioning

confidence: 99%

“…Hybrid excitation permanent magnet synchronous machines (HEPMSMs) realise the regulation of the air-gap magnetic field by adding the electric excitation windings in the permanent magnet synchronous machine (PMSM) [1][2][3][4][5]. Therefore, the HEPMSM has two excitation magnetic motive forces (MMFs), one is the PM MMF, and the other is the electric excitation MMF, which effectively solves the problem of difficulty in adjusting the air-gap magnetic field of the PM machine.…”

Section: Introductionmentioning

confidence: 99%

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Research on a hybrid excitation PM synchronous generator with stator third harmonic winding excitation

Xia

Wen

Zhu

et al. 2020

IET Electric Power Applications

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This study presents a hybrid excitation permanent magnet synchronous generator (HEPMSG) with a stator third harmonic winding to solve the problems of adjusting the air-gap magnetic field of the permanent magnet synchronous machine (PMSM) and simplify the excitation system structure. The electromotive force (EMF) of the stator third harmonic winding, induced by the inherent third harmonic magnetic field in the air gap, provides the adjustable field current for the rotor field winding via the controllable rectification. The proposed machine structure is described, and the generation mechanism and the excitation principle of the stator third harmonic EMF are analysed. The conditions for maximum excitation current output are discussed, and the integrated design methods of the stator third harmonic winding and the rotor excitation winding are described. Based on the finite element method, the performances of the third harmonic excitation system are numerically compared for different stator third harmonic windings, and the open-circuit voltage regulation characteristics under different control angles are analysed. A 2.5 kW HEPMSG prototype with a stator third harmonic winding is manufactured and tested. The predicted and experimental results are in good agreement, which verifies the correctness of the excitation principle of the proposed HEPMSG.

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“…λ 2k is the amplitude of the 2kth harmonic permeability, λ 2k = (4/π)∫ 0 π/2 λ δ (θ)cos(2kθ)dθ, and k is the positive integer. According to (2) and 3…”

Section: Excitation Principle Of Hepmsgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on a hybrid excitation PM synchronous generator with stator third harmonic winding excitation

Xia

Wen

Zhu

et al. 2020

IET Electric Power Applications

View full text Add to dashboard Cite

show abstract

“…where l ≈ l + 2δ is the magnetic length of the machine (δ denotes the air gap) and c is a form factor for the flux density [7]. The peak value of the air-gap flux densityB δ is typically in the range of 1 T. The maximum flux passing the yoke is…”

Section: Electromagnetic Analysismentioning

confidence: 99%

Integration Principles and Thermal Analysis of an Oil-Cooled and -Lubricated Permanent Magnet Motor Planetary Gearbox Drive System

et al. 2019

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A permanent magnet traction motor integrated with a planetary gearbox is studied. A machine of this kind can be employed as a propulsion motor in off-road machines like agricultural tractors that have to produce either very high traction forces at low speeds or reach higher traveling speeds at lower torques. In principle, a constant power curve as a function of speed is desired, which means that the output torque of the drive system should be inversely proportional to the operating speed of the off-road machine. Such driving conditions are challenging as the electric motor has to be heavily overloaded at the lowest speeds. Therefore, it is essential to accurately evaluate not only the electromagnetic performance but also the thermal performance of the machine. This paper studies the integration principles of an electrical machine and a planetary gear. The integration poses some new challenges to the design. For example, also the lubrication and cooling can, and, in practice, must be integrated into the system. The thermal performance of the motor and cooling with the lubrication oil of the gear were analyzed. The long-term tests with the oil cooling system were carried out to verify the successful integration.

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“…However, the PM utilization factor in the stator-PM-excited machine is relatively lower than that in the rotor-PM-excited machine, and this drawback is inherited and even amplified in stator-PM-excited HEMs. To improve their torque density, various double-stator solutions are proposed [24,25], in which a separated excitation stator is embedded into the inner machine space to boost torque density. This complicated design makes the manufacturing cost quite high, which is not suitable for mass production.…”

Section: Introductionmentioning

confidence: 99%

A Novel Dual-Structure Parallel Hybrid Excitation Machine for Electric Vehicle Propulsion

Zhang¹,

Zhao

Niu

2019

Energies

Self Cite

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Magnetic field regulation is a difficult and long-existing issue in surface-mounted permanent magnet synchronous machines (PMSMs). To produce effective and efficient flux regulation for PMSMs, a new topology, named a dual-structure parallel hybrid excitation machine (DS-PHEM), is presented in this paper. In this machine, the rotating permanent magnet (PM) excitation and stationary DC field excitation are artificially arranged and designed at the inner and outer magnetic circuits, respectively. Therefore, a decoupling and parallel feature is obtained between two excitation sources. This machine integrates the merits of a brushless structure and theoretically infinite constant power range, as well as zero risk of demagnetization. In this paper, the machine configuration is introduced, mainly focusing on some important design criteria for electromagnetic integration, and the operating principles of flux control are also analyzed in detail. To further verify the feasibility of the proposed scheme, the overall electromagnetic performance of the proposed DS-PHEM is evaluated by using the time-stepping finite-element method.

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Design and Optimization of a New Magnetic-Geared Pole-Changing Hybrid Excitation Machine

Cited by 59 publications

References 22 publications

Research on a hybrid excitation PM synchronous generator with stator third harmonic winding excitation

Research on a hybrid excitation PM synchronous generator with stator third harmonic winding excitation

Integration Principles and Thermal Analysis of an Oil-Cooled and -Lubricated Permanent Magnet Motor Planetary Gearbox Drive System

A Novel Dual-Structure Parallel Hybrid Excitation Machine for Electric Vehicle Propulsion

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