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Photovoltaic (PV) is very important to produce electric energy where the electricity is unavailable. Operating devices in this area should understand the PV characteristics. A PV powered water pumping system is an alternative way to get water for any purposes, most of them employ AC induction motor with two converters. To optimize the electric power generated by PV so that operating the PV at its...
Exhilarating advancements in power electronic technology have resulted in energy efficient methods in electric drives. This has paved the way for induction motors to be adopted for numerous industry applications replacing DC motors. Advantages of induction motors over DC motor like simpler construction, smaller motor size, lower maintenance, and better reliability them suitable for several applications...
This paper is devoted to the vector control of five-phase permanent magnet synchronous motor (PMSM) fed by a five-phase voltage source inverter (VSI) controlled by space vector modulation (SVM). Based on the mathematical model of five-phase machine, vector control strategy is developed and the corresponding controllers are properly designed in order to provide independent torque control. Five-phase...
This paper presents a comparative analysis of maximum torque per ampere control (MTPA) and zero d-axis current control (ZDAC) in Interior permanent magnet synchronous motor drive. Interior PMSM is preferred due its extra reluctance torque production. Zero d axis current control is used in most of the industrial application due its control simplicity. Due to thermal or reliability constraints the maximum...
A state of art design and stability analysis of high power density and high efficiency Permanent Magnet Brushless DC (PMBLDC) Motor drive suitable for light electric vehicle application is presented in this paper. The motor used is poly-phase, multi-pole, rectangular wave Permanent Magnet motor with outer rotor configuration. The spokes of the wheel is directly fitted in to the outer rotor of this...
This paper presents a two-degree-of-freedom (2-DOF) direct drive motor to achieve flexible motion control. As one of the motion control methods, robust position control is significant in order to functionalize industrial robots, machine tools, medical robots, and so on. Furthermore, these requires multi-degree-of freedom motion. Then the authors have proposed 2-DOF direct drive motor, which realizes...
Utilization of renewable energy has become the future trend in the trucking industry. Electrical power generated from renewable energy can replace part of the fuel energy. There is usually limited space for storing on-board battery. Thus, to better utilize the battery power, it becomes critical to have an efficient energy conversion device that can transfer energy from battery to amenities such as...
A potentially efficient topology for electric vehicle powertrains consists of a two-level inverter with a DC-DC converter, operated with variable DC voltage control. Previous studies show that variable DC voltage control can lower the amount of motor torque ripple and increase the efficiency of a drive system as a whole. In literature, the target Modulation Index (MI) is assumed to be kept at a high...
This paper aims to implement an independent speed control for dual-PMSM drives fed by a single Five-Leg Inverter (FLI). In general, dual-motor drives are designed to reduce size and cost with respect to single motor drives. However, dual-motor drives using a single three-leg inverter has its limitation in the case of operation at different operating conditions and independent speed control requirement...
If it were possible to control four sets of permanent magnet synchronous motor (PMSMs) in place of induction motors by using one inverter, we would be able to manufacture efficiently running trains. Therefore, we previously proposed a method for controlling two or more sets of PMSMs with one inverter. For this study, we conducted a parameter survey on the load changes through simulation and a mini...
Multiple-motor drive system is usually adopted in electric vehicles, high speed rail and some industry applications, such as textile, steel and paper making. In order to save cost and simplify structure, a dual permanent magnet synchronous motors (D-PMSMs) drive system fed by a five-leg inverter is investigated in this paper. Based on the space vector pulse width modulation (SVPWM) method, unity power...
This paper investigates the core losses of an interior permanent magnet synchronous motor (IPMSM) under no-load condition. Two experimental tests have been carried out to observe the impact of the pulse-width modulation (PWM) inverter voltage supply on the core losses. The results show that the high frequency harmonic of the voltage supply is responsible for about 22% of the total core losses.
Permanent Magnet Synchronous Motor (PMSM) with lower inductance values suffering from the narrow Constant Power Speed Range (CPSR). The traditional approaches for extending CPSR operation included adding an additional inductance or a thyristor controlled inductance in series with the motor. However, these approaches increase the cost, complexity, and derate the inverter of the drive system. In this...
This research proposes a novel low-voltage inverter-fed motor drive with variable characteristics achieved through the individual winding current control for the automobile traction motor. The independent armature winding with low-voltage inverters can improve the total efficiency by reducing the converter losses. Furthermore, the motor can expand the operating range since the inverters are able to...
A reduced common mode voltage (CMV) based DC-link voltage balancing strategy is proposed for a neutral point clamped (NPC) three-level inverter with permanent magnet synchronous machine. Compared to the earlier proposed strategy, it completely eliminates the Vdc/2 corresponding CMV by eliminating the two zero voltage vectors (PPP, NNN) from the space vector switching sequences. Hence, it uses only...
Electrothermal design and optimization of motor drive systems for automotive electric drivetrain applications requires simulation methods to handle large differences in timescale and component modelling across multiple physical domains. This paper presents an approach based on model-reduction and co-simulation techniques using commercially available finite element method (FEM) and circuit/system simulation...
In an AC-DC-AC motor drive system, a beat phenomenon of the motor current occurs, especially in the over-modulation range with DC-link voltage ripple and low frequency carrier. We analyze this beat phenomenon and propose two beatless control methods. One modifies the carrier frequency in accordance with the motor speed within a narrow range, and as a result, the beat frequency can be shifted to a...
This paper proposes the novel control method for mono inverter dual parallel (MIDP) interior permanent magnet synchronous machine (IPMSMs) drive system. It includes maximum torque per ampere (MTPA) control method to elevate drive efficiency and active damping control method to alleviate inherent stability problem of MIDP motor drive system. Due to the combination of reluctance and electromagnetic...
A modified virtual space vector based DC-link voltage balancing strategy is proposed in this paper. The summation of the three phase currents for the virtual vector needs not to be zero and it also keeps the two capacitor voltages balanced over a wider range of load variations. The duty cycles for all the power switches are also derived in this paper. Due to the reduced use of medium voltage vectors...
The control for a low-cost converter which consists of a half-bridge controlled rectifier and a four-switch three-phase inverter with two small film capacitors is presented, where a predictive controller is proposed to handle the large DC link voltage fluctuation, and a leading-angle flux-weakening method is used to control the converter to accomplish high speed operation of the IPMSM. Simulation...
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