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The parallel three-phase voltage source inverters have been widely used to raise system power rating. However, the zero-sequence circulating current can be generated according to switching method in the direct connection scheme. Zero-sequence circulating current not only distorts current but also reduces system reliability and efficiency. In this paper, model predictive control scheme is proposed...
Solar race cars require compact components operating at high efficiency. This paper proposes the use of a coreless axial flux permanent magnet machine, which has the attributes of low stator mass, negligible core loss and virtually zero cogging torque, as the propulsion motor. A three-phase inverter with its dc bus fed from a three-port DC/DC converter, which accepts inputs from a solar panel and...
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...
In this paper, a dual parallel connected brushless direct current (BLDC) motors drive system fed by a single inverter is presented and the control method for stable operation in electric vehicles (EVs) application is proposed. To obtain the stability of such a system, both motors should always be respect the synchronism even if they have different load torque. The proposed control method is based...
This paper proposes a non-symmetrical permanent-magnet linear motor traction system (PMLMTS), in which the primary permanent-magnet linear motor (PMLM) is employed. Four movers are mounted with same phase angles. There are nine legs, including eight independent legs and one common leg. All legs have same normal voltage but different normal currents. The normal current of the common leg is four times...
In this paper a power-hardware-in-the-loop (PHIL) based machine emulator is developed. The main utility of this PHIL based machine emulation system is in testing the driving inverter and controller of an electric drive system. This paper presents an inductive filter to interface the PHIL emulator and the driving inverter, simplifying the control of the proposed machine emulator, significantly. A detailed...
Sucker Rod Pump is a prevalent industrial solution in artificial lift applications in oil industries. Linear motors are becoming more popular as they are applied in new applications in various fields. Linear motors may be employed in artificial lift systems by placing a linear motor downhole to drive the reciprocating pump directly. This system is intended to extend the application of reciprocating...
With regard to the pulse width modulation (PWM) of seven-phase motor system if the three-phase space vector pulse width modulation (SVPWM) is simply extended to the seven phase motor system that is the seven phase of the traditional SVPWM it will produce a great harmonic current. In order to restrain the harmonic content of phase current the voltage vector synthesized in the 3rd harmonic subspace...
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 presents motor loss and temperature reduction performed with high switching frequency SiC-Based inverter for high speed motor. We developed prototype SiC inverter with proposed SiC gate drivers and custom SiC power modules. The proposed gate driver can reduce switching losses and switching delay time for higher switching frequency. We also developed SiC power modules without anti-parallel...
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...
The permanent magnet synchronous motor (PMSM) supplied by an inverter plays key roles in the critical application. Therefore, many efforts have been paid to the fault tolerant of the PMSM drive system to ensure the system continue operate in the postfault situation. Fault tolerant include fault detection and fault diagnosis> remedial action combinationing of hardware and software reconfigurations...
There is the high surge current emerging when the asynchronous traction motor is replaced by PMSM with power down-rejoining on. The high back EMF voltage exists when traction PMSM is passing the switching phase insulator. The reason is due to the constant value existence of the permanent magnet. Aiming at above mentioned problems, this paper analyses the reasons of causing transient surge current...
Gallium nitride (GaN) switches have superior switching performance when compared to the traditional Si technology. Therefore, GaN switches are an appealing option for power converters and electrical drives. In this paper, considerations for a high-speed electrical drive with inverter switching frequency of 1 MHz are presented, along with simulation results of the motor control of the drive.
The paper presents the results of studies for the sensorless drive with a permanent magnet synchronous motor, which is supplied by the matrix converter, and for comparison, is supplied by the voltage source inverter. For accurate simulation, inverter models using the SimPowerSystems library of Matlab/Simulink environment have been prepared.
The output torque of an interior permanent magnet synchronous motor (IPMSM) can be controlled within its allowable range using a pulse-width modulation (PWM) inverter. In this paper, the effect of the load torque on the iron losses of an IPMSM is studied by investigating three driving conditions, namely no-current, no-load and load conditions. The experimental data demonstrates that a torque increase...
Energy saving is arguably the most important factor in issues regarding energy and carbon emission. For electric vehicles in particular, saving energy extends the driving range. This can be achieved with a highly efficient variable-speed drive that can cover a wide speed range, and changing the number of poles is one way of realizing such a drive. In addition, electric vehicles must be fault tolerant...
Electric urban vehicles are in the spotlight of society since its autonomy dependence is not that high. Electric motorcycles and scooters are actually already reliable urban vehicles for short journeys. These vehicles can have different configurations for their powertrains. In this paper an electric scooter model is developed using Energetic Macroscopic Representation in order to analyze its braking...
Medium voltage permanent magnet synchronous motor (PMSM) driven subsea pumps have the potential to improve system efficiency and reliability to lower the operating costs, and reduce the subsea pump module (PM) weight and size. These subsea pumps can be deployed in the well, in a dummy well or on the mudline in a skidded configuration. The higher speeds achieved by such motors, compared to the same...
In this paper, a novel DC-link voltage variation method using a high-efficiency dc-dc converter for the three-phase-inverter of IPMSM(Interior Permanent Magnet Synchronous Motor) is proposed. The proper variation method of DC-link voltage is needed to reduce the torque ripple of IPMSM and, switching loss of the inverter. Also, to meet the high-efficiency requirement of the DC-DC converter with the...
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