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.
Bidirectional AC/DC power conversion has become very essential for any power electronic based industry. Pulse Width Modulated (PWM) Converters can be suggested as the best solution for rectifier as well as inverter modes of operation to achieve bidirectional power flow. In rectifier mode of operation, the converters are controlled to deliver regulated and ripple free DC output with high quality of...
Over the different Modulation Techniques, Pulse Width Modulation is one of the major renowned modulation strategy, because the pulses are generated based on reference signal and the reference signal is sinusoidal. So many modifications are made in this strategy since PWM era starts in the area of Power Electronics, the modifications are like with the reference or carrier. This paper also discussed...
For portable electronic products, high efficiency and on-chip integration is preferred. The relatively small size and fewer component used helps reduce power consumption, thus switching frequency is also improved. In order to ensure that the voltage converter can be operated at high frequency, a switching current pulse width modulation is proposed in this paper, with the aim of reducing conduction...
This paper proposes an improved space vector modulation (SVM) method for the 3-level neutral point clamped (NPC) inverter that serves as a bidirectional power conversion system for renewable energy micro-grid. Conventional SVM for the NPC converter majorly deals with neutral point (NP) balance issue without considering switching loss. The proposed SVM method balances the NP voltage and minimize the...
A new hysteresis current control method for APF(active power filter) with lower losses and high efficiency is suggested. The control circuit changes the distribution of the switching number according to the output current of APF. The switching losses of new method are lower 20% than that of conventional hysteresis control method without the influence of control precision. The adjustment of hysteresis...
In this paper a novel hysteresis current controller for APF(active power filter) with low switching losses is suggested. The controller adjusts the switching frequency with the output current of APF to reduce the switching losses effectively with the same control precision, utilizing the characteristic of APF that the sum of absolute value of three-phase output current of APF would greatly fluctuate...
The switching losses of Active Power Filter (APF) is one of the important factors that influence the performance-price ratio of APF. In this paper, a novel method is suggested. Under this new method, each phase output reference current of APF is compared to adjust hysteresis of each phase, so that the switching number of the phase that has greater switching losses is decreased, meanwhile the switching...
This paper presents an improved control strategy for dual-buck full-bridge inverter (DBFBI) with single current sensor. Hysteresis current control is used in the DBFBI. The shoot-through problem does not exist. All the power devices and filter inductors operate at each half line cycle, thus the efficiency can be increased. Only one switch works at high frequency when the reference current and the...
This paper proposes a photovoltaic parallel resonant dc-link soft switching inverter using hysteresis current control. The proposed system includes a dc-link switch for soft switching. When the dc-link switch is turned off, the inverter switches are turned on and off with zero voltage switching using hysteresis current controller. So, all of the switches in the proposed inverter are turned on and...
Hysteresis current regulator has been used widely because of its simple principle and structure. However, when the current band width is too narrow or the applied voltage is relatively too high, the switching frequency increases abruptly and it generates a large amount of heat. Thus, this study will suggest a better and simple method to reduce the switching frequency. For single phase current control,...
In accordance with the advantage of conventional hysteretic current control method, this paper advances a novel control method for active power filter (APF). In conventional hysteretic current control, the hysteretic band (HB) is fixed and actual compensating current is limited in a fixed hysteretic band. When the voltage source inverter (VSI) works in high-frequency state, as the switching frequency...
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.