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High energy density lithium ion battery (LiB) is utilized to power the electric vehicles (EVs). However, there are several problems such as low power density, high cost and cycle lifetime with LiB. A hybrid power source three level inverter was proposed to assist battery power by electrical double layer capacitor (EDLC) to cut the peak power of LiB. Extending battery life is expected by reducing maximum...
The phase currents of high-speed permanent magnet synchronous motor (high-speed PMSM) with sensorless control contain lots of harmonics. In order to solve this problem, a novel harmonic suppression method for high-speed PMSM based on voltage injection is proposed. The model of high-speed PMSM is established considering the existence of harmonic currents. The closed-loop harmonic current detecting...
A novel position/speed sensorless vector control approach which is capable of not only driving Induction Motors (IMs), damperless surface/interior Permanent Magnet Synchronous Motors (PMSMs) and PMSMs with damper winding but also tuning all electrical motor parameters used for their sensorless control system design by a unified method is discussed. This approach is tentatively named the Universal...
In this paper, a new dual-winding fault-tolerant permanent magnet (DFPM) motor drive with three-phase four-leg inverter is proposed and investigated. The proposed DFPM motor drive with three-phase four-leg inverter offers the advantages of high power density, high efficiency, high utilization rate and high fault-tolerance. To achieve the fault-tolerant performance, a new fault-tolerant control strategy...
This paper presents an innovative control law for permanent magnet synchronous motor (PMSM) drive for high dynamics applications. This kind of system (three-phase inverter connected with a PMSM) exhibits nonlinear behavior. Classically, to control the speed and the current (torque), a linearized technique is often used to study the stability and to select the controller parameters at specific operating...
This paper presents three different virtual space vector based strategies to keep the neutral point potential fluctuation (NPPF) low in the field weakening region for an interior permanent magnet synchronous machine (IPMSM) drive. Out of three strategies, one even completely eliminates the NPPF. A detailed analytical study to demonstrate the root cause behind the high NPP fluctuation in the field...
The aim of this paper is to compare performances of brushless DC (BLDC) motor on two different inverter control strategies. Sinusoidal and square wave are individually applied to the motor and characteristics are studied. A prototype inverter fed BLDC motor drive is designed and developed. DSP dsPIC30F3011 along with MPLAB IDE software is used for generation of firing pulses for each type of inverter...
This paper presents design and modelling of single stage standalone PV based PMSM (Permanent Magnet Synchronous Motor) drive. Standalone power supply system is more feasible and convenient option for water pumping applications in irrigation. Three phase DTC (Direct Torque Control) VSI (Voltage Source Inverter) is presented for supplying the PMSM for variation in solar irradiation to control the flow...
The Ironless Axial Flux Permanent Magnet (IAFPM) machine, also referred to as air-cored or coreless machine is a variant of the AFPM machine with the iron removed from the stator. This allows the efficiency and power density of the machine to be further improved [1]-[4]. However, IAFPM motors generally have very low inductance (< 50μH) due to their ironless nature [5], which increases the design...
Fault tolerance is an essential feature in marine and naval electric propulsion drives. Therefore, there is a growing research interest in developing fault tolerant technologies for marine applications. This paper investigates the control and operation of an inverter fed PM propulsion motor under a specific power electronic failure case. Compared to the technologies reported in literature, this paper...
This article describes concept and design of electronic units of remotely navigated vehicle Democar. Article is mainly focused on hardware part of this vehicle. Desribed are systems of this vehicle and their main functions. Also is included cooperation between systems with procedures for safety operation. In last part are shown results of communication between systems and functional results.
Recently, IPMSM is paying attention because of high power density and high efficiency due to permanent magnet. To control IPMSM, various kinds of inverter are used. This paper proposes the method to satisfy current limit of inverter which has 2 operating points. By changing control method of rated point, current limit of inverter can be satisfied at each operating point.
The disc coreless permanent magnet synchronous motor (DCPMSM) is drived by an inverter with current source chopper. A fast global terminal sliding mode control (FGTSMC) method is proposed in this paper for the torque loop, and the instantaneous torque is predicted. The proposed control system can dramatically reduce the current ripple of the DCPMSM by low inductance. The feasibility of this proposed...
This work provides new magnetic and electrical design guidelines for an integrated motor-drive system. Two significant design factors including the electric and magnetic loadings are targeted to address the issues associated with the combination of the motor and inverter performances. A set of new constraints are also introduced in terms of the magnetic, electrical and thermal limits of a field oriented...
The paper proposes a fault-tolerant control strategy for a two-phase permanent magnet synchronous motor (PMSM) by a structural alteration. Firstly, a two-phase PMSM is designed with a structure of combination with two conventional single-phase U-core PMSMs. Each has a self-start ability because of the step air gap design on the inner side of stator, and two sets of magnet in the motor are placed as...
The quasi-Z-source inverter (qZSI) features as the shoot-through capability and the ability to buck and boost voltage with a single-stage structure. However, the protection mechanism for the shoot-through current (STC) is essential because of the increased current stress on the switching devices. This paper presents a STC sensing method for the protection based on the combined currents. Both the STC...
This paper presents some considerations on designing and simulating permanent magnet motors with AlNiCo magnets. The design parameters of the motor considered during the simulations, along with the equation describing the motion and equations describing the involved electric model are presented. Finite Element Method Magnetics (FEMM) was used to make a bidimensional magnetostatic simulation of the...
The reliability analysis problem of the fault tolerant permanent magnet synchronous motor system in aerospace application is considered in this paper. We firstly propose a novel fault tolerant permanent magnet synchronous motor system, in which the ten-phase fault tolerant permanent magnet synchronous motor with two stators and two rotors mounted on the same shaft, and the single-phase H-bridge inverter...
Dual-inverter drive of open-end winding ac machine is equivalent to the conventional three-level inverter system from the point of view of voltage vector count, but is simpler in the structure. Decoupled PWM strategy is usually used in the dual- inverter drive. In this paper, it is proposed that a three-phase open-end winding permanent magnet synchronous motor (PMSM) is driven with a five-leg inverter...
The motor heating is closely related with the motor loss, thereby affecting the lifetime and performance of motor. So accurately calculating the motor loss is one of the key technology to study the heating and improve the working performance of the motor. In order to explore the influence of iron loss on permanent magnet synchronous motor (PMSM) driven by pulse width modulation (PWM) inverter, a model...
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