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Nowadays, the world trade volume is increasing. In many countries, the demand for container cranes is very high in order to handle the boomimg trade. The object of the crane system is to load containers between ships and shore. Operators need to convey containers safely and efficiently. However, operation of the crane system requires expert skill because of its underactuated system. Information of...
Dynamic Power Management and Dynamic Voltage and Frequency Scaling have been investigated during the last decades to reduce the power consumption of electronic circuits and systems. This paper proposes a new implementation of dynamic frequency scaling to manage the power consumption based on the occupancy level of a FIFO in a communication link between two components. Based on control theory, the...
This article deals with an electromagnetic design of a three phase winding for an induction motor with unusual number of stator and rotor slots (30/22). There are presented two types of windings. The first one is a classic integral-slot winding (m = 3, p = 1, Qs = 30, q = 5, y = 15) and second one is an interspersed winding 1-3-1. This type of winding is very useful for elimination and suppression...
The paper presents infinite speed drives with both maximum torque per amp control and maximum torque per volt control for interior permanent magnet synchronous motor. The presented method controls infinite speed drives MTPA before flux weakening occurs. As the speed goes up further to flux weakening region II, maximum torque per volt control is achieved to give more output torque. Moreover, smooth...
Motor drive system is considered the most important asset in industrial applications. Detection of broken rotor bars has long been important but difficult job in detection area of incipient motor faults. The need for highly efficient motor control drive systems becomes more and more important. Motors are controlled in closed-loop or open-loop modes of operation. This paper develops a novel approach...
This paper presents the following two methods based on torque sensor feedback: new position sensorless control method for surface-mounted permanent magnet synchronous machines (SPMSMs) and torque ripple compensation. The position sensorless techniques can be classified into two categories: the techniques based on the back electromotive force (back-EMF) and the techniques based on the high frequency...
This paper discusses a voltage limiter based on a maximum torque control frame for interior permanent magnet synchronous motors. The maximum torque control frame can separate a current vector into two components: t-axis and f-axis. The t- and f-axis represents torque and flux components, respectively. We have already shown the effectiveness of the t-axis current change for the maximum torque response...
This paper deals with a new transformerless single-phase photovoltaic inverter circuit. The circuit is well suited for thin-film or back-side contacted solar modules because one pole of the solar module can be directly connected to the neutral conductor. The circuit uses a flying capacitor for one of both half-waves, requires only five transistors and is capable of providing inductive as well as capacitive...
An inductive power transfer (IPT) system usually consists of four parts: an AC-DC power factor correction (PFC) converter, a high frequency DC-AC inverter, a compensation network comprising a loosely coupled transformer (LCT) and the resonant capacitors, and a rectification output circuit. Due to the relative large air gap, the magnetic coupling coefficient of the IPT system is poor, different from...
In this paper, an improved Space Vector Modulation (SVM) scheme is developed for matrix converter based rectifier. The conditions of using traditional SVM include small current ripple and continuous current operation mode (CCM). Thus the converter requires a very large inductor on DC side. To further reduce the size of converter, Discontinues current mode (DCM) is adopted for high efficiency compact...
Power electronic converters and electric motor drives have become common loads in advanced power systems. Passive LC filters are often used in these systems to reduce the DC-link ripples. These filters are poorly damped for reducing the power losses as well as the size, weight and cost of the system. This may lead to instability phenomena if the load is tightly controlled and absorbs a power exceeding...
The photovoltaic (PV) module efficiency conversion is affected by environmental changes, particularly by variations in temperature and radiation. There are several devices and techniques that allow a minimization of those effects and changes, by keeping the efficiency conversion at its highest level. Maximum Power Point Tracking (MPPT) and PV cooling systems can provide this efficiency improvement...
This work compares the dynamic performance of a PV charger system designed using three different power electronic converters. First it introduces the PV charger system and the three converters. Next, it presents the dynamic model of the three converters. Then, it uses the dynamic models to study and compare the dynamic performance of the converters in a range of operating points. Finally, it offers...
In this work we present the physical modeling, simulation and experimental measurement of the optical output power for a broadband infrared lamp majorly used as the heating element of infrared light SMT (Surface Mount Technology) electronic components' soldering systems. The optical output power was simulated by means of using the physical and spectral parameters of the lamp. The simulation results...
Hydraulic actuators are superior to electric motors in term of power/weight ratio. In addition, recent technical progress of electro-hydraulic valves provides fast tracking performance. However, there is a problem of steady state errors because hydraulic actuators have dead zones around zero outputs. Disturbance observers are powerful tools to eliminate disturbances on robot systems. However, if there...
The failure rate of non-steady conditions is much higher than the failure rate of steady conditions. So, it is important to monitor non-steady conditions of system. The systems' monitoring results indicate that there are large false alarms or missing alarms based on traditional process control methods. The primary problems are higher data dimension, more complex correlation among variables, non-Gaussian...
Agent technology in the power system domain is the realm of theory and laboratory simulation. Agent-based systems, due to their complexity of concept and design, may appear difficult to implement and maintain, and hence more expensive, which is a prohibiting factor against using the new technology. Designing a decision-making system for an agent is one of the most complex tasks in the development...
One of the methodologies that carry out the division of the electrical grid into zones is based on the aggregation of nodes characterized by similar Power Transfer Distribution Factors (PTDFs). Here, we point out that satisfactory clustering algorithm should take into account two aspects. First, nodes of similar impact on cross-border lines should be grouped together. Second, cross-border power flows...
This paper studies the nonlinear model predictive control problem (MPC) for networked control system (NCS) with delays in both channels. To compensate for the delays and reduce the computation, we first transform the NCS with delays into a non-delay system. Moreover, an explicit feedback control strategy is applied to provide a possible implementation for package lost and the delays. To avoid the...
In this paper a switching control law, achieving both stabilization and optimal energy management in a DC network, containing a reversible load and a storage device, is proposed. When the reversible load becomes supplier, the closure of a diode en series with the main source, avoid the energy flow towards it. However, this closure disconnects the source's mesh containing "dynamic elements"...
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