The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Inductive power transfer (IPT) systems have been developed as an alternative to the traditional direct electrical contact power supplies to drive one or more moveable and electrically isolated loads. However, to date little is known about the power distribution in an IPT system in relation to the power transfer mechanism. This paper presents the power distribution between two magnetically coupled...
This paper proposes a Sigma-Delta Modulator (ΣΔ-M) based Proportional and Integral (PI) controller for bidirectional inductive power transfer (IPT) systems. The controller uses ΣΔ-Ms to convert analog or multi-bit digital signals into single-bit signals and is ideally suited to be implemented in field programmable gate arrays (FPGAs). Various functional blocks are designed to implement PI actions...
Charging or discharging of batteries connected to the grid usually requires bulky capacitors on the battery side to filter out the large double grid frequency current ripple. This paper proposes a novel single phase ac-dc bidirectional (BD) converter that improves the utilization of the filtering capacitor by actively steering the ripple into it and thereby cycling it through a large portion of its...
As EVs are becoming increasing popular, the focus is to implement both efficient and cost effective power interfaces for charging EVs. This paper proposes a new power controller for charging EVs using Inductive Power Transfer (IPT) technology. The proposed control philosophy allows for charging multiple EVs while sharing power capability of the charging system according to tariff and without any direct...
This paper presents a new topology for tapping power from HVDC transmission lines. The proposed series power tap is implemented using a modular approach and IPT technology. Simulated results of a 1.8 MW series tap on a 533 kV DC transmission line are presented to demonstrate the viability of the proposed concept. Results indicate that the concept is attractive and, particularly, overcomes the technical...
Bidirectional Inductive Power Transfer (IPT) systems are high order resonant circuits and require relatively sophisticated control strategies to regulate the power flow. The control of multi-pick-up IPT systems is more challenging as the order and complexity of the system increase with number of pick-ups. This paper proposes a new controller to regulate the power flow in both directions in multi-pick-up...
Depletion of fossil fuels and growing concerns about climate change have resulted in an increasing trend towards the use of sustainable technologies such as electric vehicles (EVs). As a result, effective means of charging EVs and managing EVs has become one of the most researched topics in the past few years. Among the many solutions proposed, inductive power transfer (IPT) systems, especially bi-directional...
This paper presents a Model Predictive Direct Power Control (MPDPC) scheme for the control of a three-phase grid-connected Neutral Point Clamped (NPC) converter with an LCL-filter. MPDPC is a variant of Model Predictive Control (MPC) which regulates the output power of the converter within a set of hysteresis bounds, whilst minimising switching frequency and/or losses. By incorporating an Active Damping...
This paper presents a modified Model Predictive Direct Current Control (MPDCC) strategy for use with a Neutral Point Clamped (NPC) converter connected to the grid via an LCL-filter. The modified MPDCC strategy incorporates an Active Damping (AD) scheme based on the Virtual Resistor (VR) concept, which suppresses spectral content around the resonant frequency of the LCL-filter, enabling low levels...
This paper proposes a new Modular Multi-level Converter (M2LC) topology, which is based on an Inductive Power Transfer (IPT) technology. The modified M2LC topology employs an IPT system to control the capacitor voltage of each module, thereby decoupling the capacitor voltage balancing control from the load current control. The IPT system maintains the capacitor voltages within a narrow band around...
Bitstream-based control, which uses one-bit-wide signals to control power electronics applications, is a new approach for controller design. Bit-Stream signals can be directly applied to control electronic devices, but the high-frequency nature of bitstream signals can lead to excessive switching losses. Thus, it is essential to downsample bitstream signals to reduce switching losses to acceptable...
Bit-Stream based control, which uses one bit wide signals to control power electronics applications, is a new approach for controller design. A complete Bit-Stream based control system for a Doubly Fed Induction Generator (DFIG) is proposed in this paper to demonstrate an entirely hardware-based control system for DFIG applications. A new supervisory control system is proposed to provide excitation,...
In medium-voltage drives the switching frequency is limited to a few hundred Hz, necessitating control and modulation schemes capable of producing low levels of current and torque distortions at low switching frequencies. Model Predictive Direct Current Control (MPDCC) has emerged as a promising scheme for medium-voltage induction-motor drives. By forecasting the trajectory of the stator currents...
This paper presents a Model Predictive Direct Power Control (MPDPC) scheme for the control of three-phase grid-connected Voltage Source Converters (VSCs). MPDPC builds on the well-known Direct Power Control (DPC) scheme by utilising a state-space model of the system to predict the future behaviour of the system. MPDPC achieves optimal performance by minimising the switching losses or switching frequency...
Bit-Stream based control, which uses one bit wide signals to control power electronics applications, is a new approach for controller design. A Bit-Stream based control system for the Rotor Side Converter (RSC) of a Doubly Fed Induction Generator (DFIG) is proposed to demonstrate that the Bit-Stream control technique is suitable for complex vector control tasks. A new stator flux estimator and reference...
Bit-Stream based control, which uses one bit wide signals to control power electronics applications, is a new approach for controller design in power electronic systems. Bit-Stream signals are inherently high frequency in nature, and as such some form of down sampling or modulating is essential to avoid excessive switching losses. This paper presents a novel three-phase space vector modulator, which...
Bit-Stream based control, which uses one bit wide signals to control power electronics applications, is a new approach for controller design. Bit-Stream signals can be directly applied to control electronic devices but the high speed nature of Bit-Stream signals can lead to excessive switching losses. Thus it is essential to down-sample Bit-Stream signals to reduce switching losses to acceptable levels...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.