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Field oriented control methodologies are one of the dominant industry standards for induction machine drives. While this classical approach has continuously improved, direct torque control (DTC) has emerged as an alternative approach. Deadbeat, direct torque and flux control (DB-DTFC) is a more recent scheme and employs a discrete-time model inversion to achieve decoupled control of both torque and...
Hybrid buses are currently enjoying a very high level of interest worldwide. For this market an inverter family was developed using the latest IGBT technology. The tough operating conditions, and especially the mission profile in hybrid drives, represent a big challenge for IGBT modules. Electrical, thermal and lifetime limitations reduce the level to which they can be exploited. New IGBT developments...
Predictive control is becoming an alternative to standard vector control or direct torque control in electrical drives due to its fast torque response and design flexibility. In multiphase drives, where the complexity of the modulation techniques and control schemes is higher, the predictive control has proved to be a promising alternative. The main shortcoming of the standard predictive control (SPC)...
Published work on the development of series hybrid electric vehicles (SHEVs) has always been directed towards volume and weight reduction for traction batteries and the electric drives with little attention into the generator-sets. This paper presents an overview as well as a comparison of conventional and unconventional power factor (PF) correction techniques applied to generator-sets operating in...
This paper evaluates the features of a new highly modular multilevel converter topology (M2C) for medium voltage applications. Furthermore this paper will compare the M2C converter topology with existing converter topologies regarding the basic principle of operation, measurements as well as the harmonic content of the electrical output values.
Skin-pass 3 of ArcelorMittal Gent has 2 tensioning devices with 5 S-rolls each that are driven with a common planetary gear system. The DC-drive and the planetary gear system will be replaced by induction machines for each individual S-roll during the future renovation. In this paper, different control strategies for load balancing are evaluated.
This paper presents a new approach for hardware in the loop testing of voltage source inverters for drive applications. For this purpose the inverter is not connected to a real machine, but to a second power inverter instead, which acts like an electrical machine. Thereby the inverter under test can operate in its normal mode, which in the most of the cases is a field oriented current control with...
This paper describes harmonic detection methods used in industrial shunt active filters, designed for adjustable speed drive applications. The methods are based on overall - broadband and selective harmonic detection technique. All methods are described and analyzed in the paper together with several practical design steps. The methods are compared in the case of voltage unbalance and pre distortion,...
The diesel-electric drive system of an industrial truck is extended with an energy storage subsystem utilizing ultra-capacitors thus establishing a reliable technical solution with a great energy saving potential. A bidirectional three-phase DC-DC converter is proposed to charge the ultra-capacitors during the regenerative braking of the electric drive and to discharge them when peak power is demanded...
This paper presents real-time simulation results of a permanent magnet synchronous machine (PMSM) drive in faulty and non-standard modes and validates these against an actual industrial PMSM drive system. The paper will put emphasis on the test of special and faulty modes in PMSM drives. Results of real-time simulation of a PMSM drive with an open phase and in passive mode (with all IGBTs switched...
For the calculation of the common mode (CM) ground current in voltage source - inverter fed induction machines a simplified (SHF) and a distributed (DHF) high-frequency equivalent circuit are compared. The SHF circuit needs measured parameters of the electric machines, but gives good results in comparison to the measured CM ground current. The DHF circuit predicts the CM currents purely from calculated...
Aerospace systems require high power density as well as high availability. An integrated permanent magnet machine and drive has been considered. System integration aids achieving high power density in aerospace applications whereas fault tolerance increases availability, mostly by increasing system phase count. This increase in the number of system phases has certain, differing effects on various...
The proposed paper intends to investigate the benefits of using multilevel converters in high fundamental frequency applications as high speed electric drives, with particular reference to the energy recovering from gas exhaust in automotive systems. Waveforms and THD comparison of conventional two-level sine wave and neutral point clamped converters have been developed and investigated by means of...
Power generated from wind is actually a very great and a very fast growing renewable source of the world energy consumption. Optimizing performance and costs is an important issue for wind turbine generators. A laboratory for comprehensive research on the four types of power electronic generator systems for wind turbine generators and for their grid integration is presented. It consists of drives...
This paper presents research motivated by industrial demand for using power semiconductor devices based on SiC (silicon carbide). The paper deals with possibility of SiC devices application in traction vehicles. The main attention has been given to the topology of 3-phase voltage-source inverter with free-wheeling SiC Shottky diode and 1-phase traction converter with middle frequency converter for...
This paper presents the design, analysis and comparison of the conventional PI-control to two state space controllers for speed control of drive systems with elastically coupled loads. A state space controller of fourth order which considers only the mechanical system and a state space controller of fifth order which takes an approximation of the electrical system into account are analyzed. Thereby,...
The energetic macroscopic representation (EMR) has been developed in 2000 to develop control of electric drives. Since 2002 this graphical tool has been introduced to teach drive control in France, then Canada, Switzerland and China. The University of Lille proposes two drive control units using EMR for students in electrical engineering: initiation level and expert level. A first paper has described...
This paper presents the results of the modeling of the HEV with an electric power splitter (EPS) and simulation of the fuel efficiency of this type of vehicle. The new innovative technological approach is presented by using the special type of synchronous machine that splits the mechanical power on two separate power transmission parts and therefore it is called electric power splitter. EPS is based...
State-of-the-art doubly-fed induction generator drives avoid operation at synchronous speed. Engineers point out stability problems and unequal heating of semiconductors and windings as the main reasons. The latter problem is consequence of unequal losses distribution in the semiconductors and rotor windings. This work investigates the thermal behaviour of the inverter switches at this singular point...
In this paper, the control performance of servo drives is being investigated. In this context, particular focus is put on the achievable control bandwidth, dependant on the chosen design parameters such as sampling rate, sampling strategy, and filter constants.
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