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.
Induction heating can convert electrical energy to thermal energy with high conversion efficiency and quick heating. Currently, a current source rectifier/inverter-fed parallel resonant circuit is widely used as an induction heating power supply for forging applications. However, the conventional induction heating power supplies composed of phase-controlled rectifier and SCR inverter have low efficiency...
Recently there have been widespread used distributed generators and sensitive loads. It enables solid-state circuit breaker (SSCB) an imperative device to get acceptable power quality of AC power grid systems. The existing AC SSCB composed of SCRs requires some auxiliary mechanical devices to achieve the reclosing operation before fault recovery. But the new AC SSCB can achieve the quick breaking...
The functional architecture of sonar system is presented and its various functions are briefly described in order to describe the matching circuit in its context and to mark the matching circuit. The matching circuit can reduce the energy loss and system size of a sonar system by providing the variable reactive power to Sonar system, and also are influenced by the behavior of this load. In this paper,...
Recently according to the development of DC transmission which is high efficiency, stability of DC grid has become a major concern. Therefore, the reliable DC SSCB (Solid-State Circuit Breaker) is required in order to secure high safety. The previous DC SSCB is unstable and many elements are required in order to perform the operating duty. This paper proposes a new DC SSCB. Since the proposed DC SSCB...
Parametric array transducers are used for long-range and highly directional communication in underwater environment. The power amplifiers for parametric array transducers should have sufficient linear output characteristic and high efficiency to avoid communication errors, system heating, and fuel problems. But the conventional power amplifier with fixed source voltage is very low efficient due to...
Parametric array transducers are used for highly directional speaker in an air environments. Piezoelectric micromachined ultrasonic transducers for parametric array transducers need DC-biased voltage driving signals in order to get high-directional quality-sound features. The existing power amplifier such as class A amplifiers has low efficiency and require large volume heatsinks. To overcome the...
Parametric array transducers are used for highly directional speaker in an air environments. The power amplifiers for them should have sufficient linear output characteristic to amplify high-frequency ultrasonic waves with low THD, and also have high efficiency to avoid system heating and fuel problems. Piezoelectric micromachined ultrasonic transducers for parametric array transducers need DC-biased...
There is no zero crossing of the current in DC power circuits. Thus unless you cut off the short-circuit current quickly, the electrical fire caused by electric arc or spark can occur. And after the initial fault breaking operation the long-duration sustained interruption without fault recovery may cause a lot of serious economic losses. Therefore this paper proposes a new DC SSCB that has quick reclosing...
These days, widespread use of sensitive loads and distributed generators makes solid-state circuit breaker (SSCB) an essential component in power circuits to achieve a high power quality for AC Grids. In the case of previous AC SSCB using SCRs, some auxiliary mechanical devices are required to make the reclosing operation possible before fault recovery. However, the proposed AC SSCB can break quickly...
Parametric array transducers are used for long-range and highly directional communication in an air or underwater environments. The power amplifiers for parametric array transducers should have sufficient linear output characteristic and high efficiency to avoid communication errors, system heating, and fuel problems. But the conventional power amplifier with fixed source voltage is very low efficient...
The paper proposes a new multilevel variable output voltage AC/DC Converter for power supply of power amplifiers used in underwater acoustic sensors. The proposed multilevel variable output voltage AC/DC Converter is composed of two converter sections. One as the input section is a high efficiency phase-shifted PWM full bridge DC-DC converter to get multiport power sources. The other as the output...
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.