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This manuscript presents modified scheme of synchronous space-vector modulation allowing providing nonlinear dependences between the fundamental voltage and fundamental frequency of dual three-phase open-winding ac drive with four modulated inverters. Behavior of the system with six control modes (characterized by different dc-voltages and switching frequencies of inverters) and two nonlinear Voltage/Frequency...
In this paper, design of a robust cascade controller for a Cuk converter is investigated. The controller contains two loop cascaded structure. The external voltage loop, which is the slow loop, contains the continuous proportional-integral(PI) voltage controller whereas the internal current loop, which is the fast loop, contains the continuous sliding mode controller(CSMC). The controller effectiveness...
This paper presents results of research of modulation processes in power conversion system with triple voltage source inverters, supplied by photovoltaic (PV) strings, and connected to a four-winding transformer. The transformer has in this case specific connections between the secondary windings and inverters, allowing providing of multilevel voltages at secondary windings of the transformer. Specialized...
A generalized frequency converter has been realized which makes use of a cyclo-converter in newer form AC-AC converter. An attempt has been made to operate this converter both in a conventional low frequency AC-AC converter and a new high frequency AC-AC converter. The ability to directly affect the frequency conversion of power without any intermediate stage involving DC power is a huge advantage...
In this paper hybrid non isolated and non-invertingCockcroft-Walton multiplier based 2Nx InterleavedBoost converter (2Nx IBC) for renewable energy applications is presented. The presented hybrid boost converter topology is derived from non-inverting Nx Multilevel Boost Converter (Nx MBC) and inverting Nx Multilevel Boost Converter (Nx MBC). In renewable energy applications, generated voltage needs...
This Field Programmable Gate Array (FPGA) based digital controller has been developed to improve the output of the frequency converter using Hardware Description Language. An attempt has been made to analyze converters using three modulation techniques namely sinusoidal pulse width modulation (SPWM), delta modulation (DM) and trapezoidal modulation (TM) to reduce the harmonics. It has been found that...
The line-start permanent magnet synchronous motor (LSPMSM) attracted a considerable attention because of the higher value of the product between the power factor and the efficiency. The paper proposes an analytical design method for the LSPMSM, considering the asynchronous starting and the synchronous steady state parameters. Using this theoretical approach, all the synchronous and asynchronous starting...
Due to its simplicity and low manufacturing costs, the Lundell or claw-pole alternator resists in competition as an electromechanical source of the electrical energy m vehicles. Lundell alternators are today built in a power range up to 5 kW and in a speed range up to 18000 rpm. A new 42 V power management system was proposed. It consists of the conventional power management system at which, between...
The paper purpose is to dignify some aspects regarding the calculus model and technical solutions for surveillance system based on self-supporting gyroplane used to local observations and scientific equipment carrying. The calculus methodology consists in numerical simulation of different gyroplane evolution. The gyroplane model which will be presented has six DOF and autonomous control system. The...
Due to the quick evolution of manufacturing processes, the demand for more flexible automation systems is on the rise. To answer these requirements, distributed motion control architecture based on intelligent drives tends more and more to replace the traditional solutions. This paper presents the control of an articulated arm robot with two local intelligent servo drives connected on a CAN network...
This paper is aimed at the study of conventional 14 V automotive electrical supply systems as a basis for the development of a novel 42 V supply system capable to provide maximum power to both the vehiclepsilas battery and the on-board consumers. By analyzing the operating characteristics of the 14 V Lundell alternator system, the conditions for maximum output power at various alternator driving speeds...
The paper presents a new predictive algorithm for the control and protection of electric power networks that will be implemented In switching power equipment for hazardous areas in potentially explosive atmosphere. Simulated model using HPVEE Pro6 software and microcontroller CY8C29466 hardware Implementation were designed to work with the predictive algorithm.
The control system for position control of the drive employing PMSM based on the principles of sliding mode control and respecting the principles of vector control is presented. Designed controller is chattering free and complies with demanded control precision. Described control technique divides PMSM into two channels, which enable to control motor flux and torque separately. The controller is of...
A novel hysteretic controller for a bi-directional dc-dc converter with ZVS and interleaving for dual voltage systems in automobiles is presented. A variable frequency extended band hysteretic current control method is proposed. In comparison with classical fixed frequency current control PWM, the reverse polarity peak current needed for ZVS operation is kept constant. Inductor current ripple decreases...
This paper is aimed at the study of conventional 14 V automotive electrical supply systems as a basis for the development of a novel 42 V supply system capable to provide maximum power to both the vehicle's battery and the on-board consumers. By analyzing the operating characteristics of the 14 V Lundell alternator system with conventional three-phase full-bridge diode rectifier, the conditions for...
An electromagnetic model for Lundell alternator switched-mode rectifier system including the main parameters is presented. The purpose of the study that underlies this paper was to create a simple model, capable of providing a satisfactory description of the machine??s magnetic properties by considering of the saturation and the saliency. The paper deals with an approach using both analytic and experimental...
A novel bi-directional dc-dc converter with ZVS and interleaving for dual voltage systems in automobiles is presented. A variable frequency extended band hysteretic current control method is proposed. In comparison with classical fixed frequency current control PWM, the reverse polarity peak current needed for ZVS operation is kept constant and no in excess circulating current losses at light load...
An analysis and experimental verification of the operating point stability of the line-start permanent synchronous machine (LSPMSM) supplied from a current source provided with power factor control is presented. The control system acts to inject the stator currents at a controlled angle related to the stator voltages. The machine parameters are varying because of magnetic saturation and as a result...
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