Christopher H. T. Lee

A Partitioned-Stator Flux-Switching Permanent-Magnet Machine With Mechanical Flux Adjusters for Hybrid Electric Vehicles

In this paper, three partitioned-stator (PS) machines, namely the PS flux-switching permanent-magnet (PS-FSPM) machine, the PS-FS hybrid-excitation machine, and the flux adjuster PS-FSPM (FA-PS-FSPM) machine are proposed for the hybrid electric vehicles (HEVs). Owing to the installation of additional inner-stators, all three proposed machines can offer satisfactory power and torque densities. In particular, the FA-PS-FSPM machine artfully utilizes its inner space to accommodate the mechanical FAs, such that outstanding flux-weakening capability for wide-speed range operation can be achieved. To verify the proposed concept, the established machines are purposely compared with the profound Prius HEV machine based on finite-element method.

A New Electric Magnetic-Geared Machine for Electric Unmanned Aerial Vehicles

This paper proposes a new electric magnetic-geared (EMG) machine, which artfully incorporates the magnetic gear into an outer-rotor inserted permanent-magnet (PM) machine, purposely for electric unmanned aerial vehicle (e-UAV) application. The proposed EMG machine artfully shares the sandwiched-rotor for both the PM machine and the magnetic gear. As a result, the proposed machine can run in the high speed and high power for propelling the e-UAV. The design details, operation principles, static characteristics, and machine performances, as well as the propulsion performances of the proposed machine, are elaborated and discussed. The finite-element method is utilized to verify the validity of the machine design and performances, with emphasis on the e-UAV application.

Proposed Electronic-Geared Machine for Electric Vehicle Applications

Energy utilization and environmental protection have become the hot research topics in recent years, while as one of the most promising solutions to improve the current situations, the development of the electric vehicles (EVs) is speeding up.

Development of Singly Fed Mechanical-Offset Machine for Torque Ripple Minimization

Energy crisis and environmental pollution have gained more attentions in recent years, so that the developments of renewable energy systems, such as electric vehicle (EV) or wind power generation, have become very popular (Barton and Infield in IEEE Tran Energy Convers 19(2):431–438 (2004) [1]; Emadi et al. in IEEE Trans Ind Electron 55(6):2237–2245 (2008) [2]; Santiago et al. in IEEE Trans Veh Technol 61(2): 475–484 (2012) [3]).

Proposed Flux-Reversal DC-Field Machine for Wind Power Generation

Energy crisis and environmental pollution have become the worrying problems since the last few decades, while the renewable wind power generation has confirmed to be one of the most probable solutions to relieve the situations (Barton and Infield in IEEE Trans Energy Convers 19(2):431–438, 2004, Hughes et al. in IEEE Trans Power Syst 20(4):1958–1966, 2005).

Proposed Reliable Gearless Machine for Magnetic Differential System

Electric vehicles (EVs) have been regarded as the cleanest and greenest road transportation for smart cities (Emadi et al. IEEE Trans Ind Electron 55(6):2237–2245, 2008, Hua et al. IEEE Tran Magn 51(3):8201805, 2015).

Overview of Magnetless Doubly Salient Brushless Machines

Due to a large variety of industrial applications, including the electric vehicles (EVs), wind power generations, ship propulsion systems, and robotic applications, the development of the electric machines has been a hot research topic in the last century (Cheng et al. in IEEE Trans Ind Electr 58(11):5087–5101, 2011 [1]).

Proposed Dual-Mode Machine for Wind Power Harvesting

Because of the increasing concerns on the energy utilization and the environmental protection, the wind power has gained lots of attentions recently. The wind power harvesting applications generally can be classified as two big families, namely the constant-speed constant-frequency (CSCF) wind power generation and the variable-speed constant-frequency (VSCF) wind power generation. Without installation of power converters, the CSCF type takes the absolute merit of compact system architecture as well as simplicity. Yet, its operating speed has to be maintained in a limited range so that there is no correlation with the wind speed. Therefore, it suffers from the problems of lower efficiency and higher mechanical losses.

Double-Rotor Machines—Design and Analysis

Because of the enhancing needs on the environmental protection and energy utilization, the development of electric vehicles (EVs) and renewable energy (RE) are speeding up in the past few decades.

Multi-tooth Machines—Design and Analysis

Because of the enhancing concerns on the energy utilization as well as the environmental protection, more attentions have been placed on the development of electric machines.