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The development and the test of a palm size finless torpedo shaped micro autonomous underwater vehicle (AUV) named Lancelet are presented. The vehicle has a diameter of 60 mm and only weighs 570 g. It has no appendages such as rudders, elevators, external propellers or other unprotected moving surfaces, which might increase the drag of the vehicle and interfere with the underwater obstacles. A novel...
This paper presents the current application situation of five-phase permanent magnet synchronous motor and control algorithms. The mathematical model is established through the coordinate transformation, meanwhile the linear decoupling equation of PMSM state is also derived, two-vector control algorithm (NTV-SVPWM) and four-vector control algorithm (NFV-SVPWM) are discussed especially. A modified...
Energy consumption and efficiency of electrical drives became an increasingly important issue. This issue encourages many researchers to develop new control techniques to reduce the energy consumption in electrical drives. Some of those techniques are more effective than others; some of them could save energy but will affect the response of the drive. DB-DTFC control has the fastest possible response,...
Research conducted previously has shown that a battery electric vehicle (BEV) motor design incorporating drive-cycle optimization can lead to achievement of a higher torque density motor that consumes less energy over the drive-cycle in comparison to a conventionally designed motor. Such a motor indirectly extends the driving range of the BEV. Firstly, in this paper, a baseline fractional slot concentrated...
This paper presents a novel methodology investigating a characteristics of variable leakage flux interior permanent magnet synchronous machine (VLF-IPM) using arc-shaped magnets. In general, motor parameters such as magnet flux, Ψa, inductances on d-q axes, Ld and Lq, are dealt as constant values, while motor parameters need to be dealt as variables depending on load currents for VLF-IPM machines...
This research analyzes the vibration phenomenon in certain types of fractional slot permanent magnet synchronous machines that excites low order radial forces. The study utilizes a motor topology from the group having 12-stator slots and 10-rotor poles (12s10p) to identify and propose several design-based solutions to reduce vibration. Some electromagnetic design feature variations in the motor geometry...
This paper proposes a distributed speed control with improved power sharing capability for multi-three phase synchronous machines. This control technique allows the speed to be precisely regulated during power sharing transients among different drives. The proposed regulator is able to control the time constant of the current within the dq0 reference frame to a step input variation. If compared to...
Referring to a 4-wheel drive Formula Student Electric vehicle, a fractional-slot synchronous permanent magnet machine has been designed. Torque density has been improved adopting outer rotor topology and lightweight materials. An ironless rotor with PMs placed in an Halbach array configuration allows reduced rotor inertia to be obtained. The results described in the paper provide a quantitative assessment...
The on-going electrification transportation system revolution has already started and the continuous evolution of power electronics allows new and more reliable system layouts and control strategies to be investigated. Mainly, this revolution is driven by increased reliability levels. Since multi-three phase motors are fault tolerant by definition, they are a very good candidate for more reliable...
Permanent magnet synchronous motor with its high torque density, high efficiency and high reliability, has become the mainstream of the drive system for electric vehicles, elevators, etc. The existing method of fault diagnosis based on the motor model has not considered the fractional characteristics of motor. it is difficult to effectively diagnose minor faults of the current. With the permanent...
Permanent Magnet Synchronous Motor (PMSM) as the key component of the Electric Vehicles (EVs), has numerous advantages over other synchronous motors. Fault diagnosis is essential to guarantee the safety and continuity of the operation for EVs. An undetected fault in the PMS M system may lead to high repair cost, or even catastrophic failure. Among lots of faults in the PMSM, the most serious are short...
Based on previous research experience proved by simulated and experimental results a comparative discussion about advantages and disadvantages of using Vector Control or Direct Torque Control for PM-SM drives is presented.
In this paper there is detailed the asynchronous operation caused by an important overload, of a synchronous motor. There are mentioned the currents of all the windings, main flux, electromagnetic torque, electrical angular speeds of the rotating field and of the rotor which define the amplitudes of the electrical, magnetic and mechanical stresses. The effect of the damping windings resistance in...
This paper presents a simple methodology for calculation of the Permanent Magnet Synchronous Machine (PMSM) efficiency map. The presented method requires only the machine nameplate data and allows to a system designer to estimate the efficiency for different operating conditions, such as a different driving cycle in traction applications. The method has been experimentally verified for both large...
Double Excited (or Hybrid Excited) Synchronous Motors (DESM or HESM) has gained great interest as they have the ability to control the air-gap field, and consequently the electrical drive speed due to the auxiliary excitation winding. To obtain the magnetic field distribution in the air gap many techniques are used. The Schwarz-Christoffel (SC) mapping allows the mapping of the slotted structure of...
In this paper, a robust and an efficient tracking controller based on model reference adaptive system (MRAS) technique is performed for mobile robot in order to get the accurate trajectory tracking performance. The model reference adaptive system (MRAS) technique has been presented so as to achieve the estimated value of system's speed information. To estimate the rotor position and speed of the mobile...
The paper describes the design and the experimental validation of an electric naval propulsion system with rim driven propeller. The electric naval propulsion system is submerged in water providing an effective cooling for the electric machine and thus achieving a high power density. The proposed slotless design of the permanent magnet (PM) machine allows a convenient way to protect the motors' active...
This paper studies a new intelligent operation technology of high voltage circuit breaker(HVCB). An operating mechanism driven by a three-phase permanent magnet synchronous motor (PMSM) for HVCB is described. Through simulation model, the mechanism's opening and closing operations characteristics are simulated and calculated, and the relationship between the optimal moving contact travel of HVCB and...
The servo motion system plays an important role in the position accuracy of the Cartesian picking robot. During the automatic picking process, the nonlinearity of friction will affect position tracking accuracy. In order to improve the position accuracy of Cartesian robot, a mechanical model considering friction is established. Furthermore, fuzzy logic controller based on PID is used to control the...
Electrification offers a great potential for commercial vehicles to significantly reduce energy consumption as well as CO2 and pollutant emissions during operation. The project eLift demonstrates the potential of the electrification of a special-purpose vehicle. A conventional diesel catering truck with hydraulic auxiliary lifting unit is to be replaced by a more efficient electrically driven truck...
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