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In this paper, we propose the method to realize high efficiency control for IPMSM (Interior Permanent Magnet Synchronous Motor). In this method, we pay attention to the torque equation. We realize high efficiency control by controlling the vector angle of stator current. As for the high efficiency control, we define the optimum angle as the stator current angle which makes the torque biggest against...
This paper presents an effective method to improve the dynamic performance of permanent magnet synchronous motor(PMSM) servo system which can be implemented via on-line PI self-turning. The algorithm is deduced from the relationship between PI adaptive parameters and the inertia of the PMSM servo system. The proposed method is simple and easy to implement for realtime application. Simulation results...
Low speed control is indispensable to several servo applications. Generally, motor speed obtained from the so-called M method is averaged by counting the number of pulses from the coupled encoder at a fixed time period. As a result, for speeds lower than the minimum measurable value determined by the sampling frequency and the resolution of the encoder, a long detection delay time may degrade the...
The objective of the paper is optimization of the outer rotor permanent-magnet transverse-flux motor using design of experiments. First, the 3-D time-stepping finite-element analysis is used to evaluate the relationship between the measured and calculated results. Further, in the 3-D time-stepping finite-element analysis a parametric model of the transverse-flux motor is coupled with an external three-phase...
Although magnetic bearing motors suffer no friction loss and hence require no lubrication, they are not widely used because of their high cost and large size. To solve these problems, a self-bearing motor having a simple structure with distributed windings is proposed. The rotor consists of a permanent magnet and an iron yoke that rotates in the body. The stator consists of a six-phase distributed...
Based on the technology of field programmable gate array (FPGA), a realization of fuzzy control (FC) system with radial basis function neural network (RBF NN) tuning is presented to a permanent linear synchronous motor (PMLSM) drive in this paper. Firstly, a mathematic model of the PMLSM drive is defined; then to increase the performance of the PMLSM drive system, an FC constructed by a fuzzy basis...
This paper proposes an adaptive backstepping controller design for a position control system of permanent-magnet synchronous motors. The proposed system has been successfully used in a knitting machine with satisfactory performance, including fast transient responses, good steady-state responses, and good tracking ability. Based on properly selecting a Lyapunov function, an adaptive backstepping position...
Transverse flux machine (TFM) useful for in-wheel motor applications is presented. This transverse flux permanent magnet motor is designed to achieve high torque-to-weight ratio and is suitable for direct-drive wheel applications. As in conventional TFM, the phases are located under each other, which will increase the axial length of the machine. The idea of this design is to reduce the axial length...
Performance investigations and drive designs of an interior permanent magnet (PM) machine, in both the constant torque and the flux-weakening operating regions, are generally conducted based on the machine parameters that are calculated from finite element analysis (FEA). To properly select the optimal current control angles for maximum torque generations at various speeds, this paper presents thorough...
This paper discusses the importance of a simulation study of the Taiwan Electrical Fuel Cell Power Scooter. This study applies a more detailed modeling which is complex as existing modeling methods, yet not more difficult to solve numerically. In most simulation studies, the influence of non-linearity (for example, saturation, losses, reluctance effects) of the power electronics and electrical machine...
This paper investigates the existing structures of transverse flux machines (TFMs) that can be constructed as an outer rotor in-wheel motor which is suitable for low speed applications. As the main characteristic of TFM is providing the best torque density at low speeds, it would be a suitable choice and having a great future for low speed mobile platforms. Different structures of TFM are re-designed...
This paper presents a 3-phase, 400 W, 14000 rpm, 2-pole/3-slot non-overlapping windings PM motor. In the design of the motor, Taguchi parameter method coupled with the finite element method (FEM) analysis is employed to minimize the level of cogging torque and maximize the efficiency of the motor. A mechanical analysis is carried out to investigate the mechanical feasibility of the rotor due to high-speed...
In this paper, a filtering-type sliding-mode control with a radial basis function network (FSCRBFN) for a two-axis motion control system, which consists of two permanent magnet linear synchronous motors (PMLSMs), is proposed. First, the dynamics of the single-axis motion system with a lumped uncertainty which contains parameter variations, external disturbances, cross-coupled interference and nonlinear...
The concept of memory is due to the fact that the magnetization level of permanent magnets (PMs) in the motor can be easily regulated by a current pulse, and then be memorized automatically. By incorporating this memory concept into the hybrid-field doubly-salient PM (DSPM) motor, the DC-excited memory motor can offer effective and efficient flux control. The purpose of this paper is to newly propose...
This paper presents a magneto-thermal model for high-speed SMC motor. Due to high frequency, core loss is much greater than other losses and it is of crucial importance to be able to calculate the core loss accurately. By using time-stepping FEA, the total core loss is computed by summing up the separately calculated alternating and rotational hysteresis, eddy current and anomalous losses in each...
Due to the flux-mnemonic nature of AlNiCo permanent magnets (PMs), the flux-mnemonic motor can offer efficient online air-gap flux control. By incorporating the flux-mnemonic concept into the hybrid-field doubly salient PM (DSPM) motor structure, the resulting flux-mnemonic DSPM motor can flexibly operate at the magnetizing mode when PMs are fully magnetized or the demagnetizing mode when PMs are...
This paper presents a new scalar-controlled double-stator permanent magnet brushless (DS-PMBL) motor. Because of the special phase decoupling structure, scalar control strategy is newly incorporated into the time-stepping finite element method (TS-FEM) to analyze the transient performance of machine. The complicated coordinate transformation is avoided and constant torque and flux weakening control...
High performance applications like power steering and robotics require motor drives that produce smooth torque with very low components of cogging torque. To fulfil such demands a variety of techniques are known to reduce native cogging torque components in permanent-magnet motors. However, motor designers usually do not consider that assembly tolerances in mass-production give rise to additional...
This paper proposes an adaptive inverse controller design for a micro-permanent magnet synchronous motor control system. The adaptive inverse controller is constructed by using an adaptive model and an adaptive controller. The parameters of the adaptive model and adaptive controller are on-line tuned. By using a state estimator, the speed signal is obviously improved. In addition, the control system...
The hybrid recurrent fuzzy neural network (HRFNN) control permanent magnet synchronous motor (PMSM) drive system using rotor flux estimator is developed to control electric motorcycle in this paper. First, the dynamic models of a PMSM drive system and electric motorcycle are builted though experimental tests and parameters measurements. Then, a HRFNN control system using rotor flux estimator is developed...
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