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This paper proposes a simple duty cycle modulated direct torque control (DDTC) for permanent magnet synchronous motors (PMSMs). DDTC sequentially output an active vector and a zero vector during each control period. The duty cycle of active vector is obtained using a duty cycle generator according to the torque error, which can avoid the complex calculation process associated with conventional DDTC...
The article presents simulation research concerning speed control of two mass system with elastic joint and backlash utilizing the ADRC method. The model of the plant and the structure of the ADRC speed controller are presented together with mathematical formulas allowing to determine the observer and controller gains. Proper quality indicator of control process is defined and also sample scenario...
In this study, a novel mode l of a Hybrid Electric Vehicle (HEV) based off the 2016 Chevy Volt is implemented and examined. The study will also examine the operation of the modified Series Parallel Hybrid Electric Vehicle (SPHEV) and modeled powertrain components contained within. The 2016 Chevy Volt has six unique modes of operation; however, the dual Permanent Magnet Synchronous Motor (PMSM) EV...
In order to study the theory and characteristics of the mechanical drive system fault in the current signal of the wind turbine generator better, the fault simulation experimental platform of double fed wind generator drive gear is used as the research object, and the simulation model of double motor torque and rotational speed coupling is established by a motor and a doubly fed wind generator according...
Electric Power Assisted Bicycle (EPAC) is becoming the transport and fitness tools that people pursue because of its green, healthy and economical characteristics. Compared to the conventional electric bike, EPAC not only reduces the burden on the rider, but also maintains the original bicycle characteristics. Nowadays, there is few study of the control approach adaptive to road slope and load for...
Hybrid electric vehicle use internal combustion engine (ICE) and electrical power, so it has the advantages of strong power, low fuel consumption, low emissions and so on. The research object of this paper is the single-axle parallel hybrid electric bus. In this paper, a hybrid electric vehicle model including vehicle dynamics system, motor system, engine system, battery system, clutch and energy...
Use of a rotor type UAV that can perform three-dimensional movement and hover is being actively pursued. Although a multi-rotor type UAV is important, because it is driven by electric motors its application has the limitation of a short cruising time. In this study, the composition and control system of a single rotor UAV that achieves attitude control by pivotable vertical fins are proposed. Herein,...
The proper control of induction motor drive is an important task in many applications. Usually, the motor is supplied from voltage source inverter and the required voltage is calculated according to the actual and past states of the motor. Unlike this, the predictive methods calculate also the future state and adjust the voltage accordingly. The model predictive control method calculates the effects...
This paper presents an algorithm for speed ripple reduction of an oil cooler compressor. An oil cooler compressor is typically used for a machine tool to reduce thermal variation error at a processing area. However, mechanical vibration of a single rotary compressor should be reduced because it results in noise and stress on a pipe. Therefore, a real time ripple reduction algorithm is proposed to...
In this paper we propose the algorithms that can be used to determine the values for several parameters that characterize the dynamic regime of operation of a DC motor. These parameters values are determined by simulation based on a state-space model by means of a virtual instrument made in LabView. In this way is possible to observe the dynamic characteristics of the DC motor in different operating...
In this paper, the use of an adaptive control method for an induction motor is described. Using the conventional adaptive control method, it is possible to stably estimate the inverse time constants (both primary and secondary) during the powering mode. However, it becomes unstable during the regenerating mode. To solve this problem, there is a method that changes the adaptive control gain in the...
The paper considers some features reflected by simulation of electric drives operated in the random load modes. It is shown that the distribution laws for losses and the torque are essentially different. I.e., when modeling random modes of electric drive it is impossible to transfer the distribution law of the motor load, which is characterized by the motor torque, to the motor loss distribution....
Hybrid and electric buses are becoming more common sight in traffic. Especially the electric buses play an important part in reducing traffic emission. In this paper, energy consumption and energy cost of different busses (diesel, hybrid and electric) are studied. The buses are studied with Lappeenranta Route 1.
This paper presents an analysis of the torque ripple minimization under unbalanced phase resistance (UPR) in a five-phase permanent magnet assisted synchronous reluctance motor (PMa-SynRM). There are many reasons for arising UPR conditions in a motor. One of the key reasons can be the shortening winding turns of the motor which significantly reduces the winding insulations. Therefore, over the times,...
This paper firstly introduces the mathematical equations of PMSM (permanent magnet synchronous motor), an overview of direct torque control (DTC) and a DTC based on sliding mode control for PMSM, and then builds PMSM control system simulation models with above two methods in MATLAB /Simulink environment. Finally, we got the starting response, torque ripple and load perturbation responses of DTC and...
Advance in high-tech industries is due to evolution, respectively performance of electrical machines. Worldwide, designers are concerned to find answers to current questions such as: performance growth of asynchronous motors, reduce manufacturing and operating costs by adopting solution in line with global optimization approaches. Condition imposed to asynchronous motor design is limited startup current...
This study presents the direct torque controlled induction motor (IM) drive utilizing a novel extended Kalman filter (EKF) that simultaneously estimates stator stationary axis components of stator currents and stator fluxes in addition to rotor and stator resistances with the assumption of available stator voltages/currents and rotor speed. Thus, it is desired to show that the on-line estimations...
This paper presents a method how to simulate overhead DC network transmission losses that are estimated by a variable location of an electric vehicle regarding to an invariable location of a traction substation. Electric public transport infrastructure is one of the major electrical energy consumers. Electrical energy amount which is acquired due to overhead line voltage drop and current flowing through...
Nowadays the comfort in passenger transport system is very relevant. One source of noise and vibration is the torque ripple. Torque ripple can be generated by an inappropriate machine control tuning and by the inherent torque ripple of the machine. In permanent magnet machines, the inherent torque ripple is composed by three components: electromagnetic torque, reluctant torque, caused by the winding...
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