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In permanent magnet servo motors, each component has a certain temperature limit. For on-machine device with electronic components, like the high resolution optical encoder, the temperature limit is commonly less than 125°C. While for the motor body, the winding and the magnets usually have higher temperature limit. During continuous operation, the encoder temperature, rather than the winding or magnet...
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 describes a simple ripple compensation method of suspension force and torque in a bearingless surface-mounted permanent magnet (SPM) motor with two-phase integrated winding configuration. Only two H-bridges or eight power transistors are used for the proposed topology. The neutral point of each phase is connected to the middle point of the power sources to superimpose the suspension and...
An interior permanent magnet synchronous machine drive exhibits an inherent wide speed range capability. In order to exploit this peculiar characteristic while assuring the lowest power losses, a proper control algorithm has to be used. In particular, as long as the required voltage is below the limit imposed by the available DC bus, the control algorithm must command the maximum torque per ampere...
In the industrial field, the drive system integrated the high speed motor and the gear is required to effectively utilize the limited space. However, mechanical gears often require their lubrication and cooling, they generate whilst noise and vibration. To overcome these problems, the magnetic gears have been expected. Magnetic gears achieve the system with maintenance-free, low noise and low vibration...
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...
With the advantages of small size, light weight and more compact construction, brushless DC motor (BLDCM) has been widely applied to the field of industry. Centrifugal compressor converts the kinetic energy of the air into pressure, and it can be used to provide air to the full cell. The drive and control strategy of BLDCM not only affect the characteristics of centrifugal compressor, but also has...
Advanced angle commutation is an effective approach to suppress the commutation torque ripple for doubly salient electromagnetic machine (DSEM). In this paper, the commutation process under “three-phase three-state” conduction mode is analyzed in detail at first. On this base, a novel self-optimizing control strategy of advanced commutation angle for DSEM is proposed, it starts with setting an initial...
This contribution suggests an approach to determine the optimal design of a Permanent Magnet Synchronous Motor for a given application by calculating the effects of coil configuration switching, pole-changing and multi-phase windings. The impact on the torque-speed-characteristic of a motor is evaluated in a normalized parameter plane, enabling the designer to compare the influences by using criteria...
This paper presents the design of an interior permanent magnet synchronous motor (IPMSM) with fractional-slot concentrated winding (FSCW). The study determines the number of poles and slots considering the winding factor and unbalanced magnetic force. Conventional calculation method is used to obtain the initial dimensions and finite element analysis (FEA) is adopted to acquire the performance of...
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...
Two control strategies, a finite-state predictive torque control and a linear control with space-vector PWM, are developed and experimentally assessed in this paper. Both strategies are used to control a permanent magnet synchronous motor supplied by a three-level neutral-point-clamped inverter. The high complexity of the drive system and the different nature of the control objectives make the development...
This paper is concerned with the design of a robust position Backstepping tracking controller for a permanent magnet synchronous motor (PMSM). A Backstepping control law is designed from the input-output linearization of the PMSM model, written in d-q coordinates. This controller is adapted via the estimation of the unknown load torque and friction effects. A linear extended state observer is devised...
Implementation of a Fuzzy Logic speed controller for a Permanent Magnet DC (PMDC) motor using a low-cost Arduino interfaced with a standard xPC Target MATLAB environment is demonstrated. The Arduino solution is acceptable at kHz sampling frequencies. The study of speed control of PMDC motor based on Arduino and L298N H-Bridge using an artificial intelligence control method, such as Fuzzy PID with...
Progresses obtained in command and power electronics have increased the technical and economic performances of brushless direct current motors. Consequently, the problem of optimum design and operation of these motors, frequently used for driving small vehicles, is a very present one. Studies presented in literature show that high oscillations of torque occur in these motors in a complete rotation...
According to the characteristics of ship propulsion, the external load characteristics of the direct drive motor are analyzed. The overall design of the propulsion motor is taken as the starting point, and the optimal design of the electromagnetic loss is deduced. From the point of iron loss, copper loss and harmonic loss, to reduce the mechanical loss of the motor; From the point of bearing friction...
Motor drive operation mechanism of High-Voltage Circuit Breaker(HVCB) need permanent magnet synchronous motor(PMSM) with high-dynamic response. Reducing the rotor inertia of PMSM is one technique to realize high dynamic response of the motor. By digging holes in the rotor, the inertia can be reduced. The influence of shape, position and size of inertia-reducing holes on the performance of PMSM is...
This paper studies the dynamic performance of BLDC motor with MatLab/Simulink, and the results of torques and speeds are verified with Mathematica software. MatLab/Simulink provides suitable environment for control application and power electronic design, whereas Mathematica is better for symbolic part and therefore it could be preferred for design and control applications for electrical motors. By...
In this study, we examine simulation models of shunt, separately excited and permanent magnet direct current motor dynamic behavior during starting, steady state and stopping time (electrical braking) for dynamic simulation of electromechanical energy conversion using MATHEMATICA 10 environment. It is surly important to control the speed; keep it constant and reduce it safely with desired time while...
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