A short circuit protector will quickly switch off power in case of an overload or short circuit fault in order to quickly isolate or eliminate the fault. This research uses the contradictions matrix of the TRIZ innovation theory and 40 innovation principles to innovate and improve the product. The improved...

In order to solve the fault feature redundancy problem in analog circuit fault diagnosis, a method of fault diagnosis is presented in this paper. This approach using the method of wavelet decomposition and fuzzy clustering on the fault signals to obtain test matrix; then inputted the test matrix into...

Recent research has proved that, the local reactive power control laws considered to solve voltage stability issue might lead to voltage instability. For this reason, the current paper proposes an approach to study voltage stability of multiple distributed generators in distribution feeders. The methodology...

This paper proposes a method of rotor position and speed estimation for magnetically suspended permanent magnetic synchronous motor (PMSM) based on modified sliding mode observer(SMO). In order to weaken the chatting phenomenon, the estimated back-EMF is brought in the current model and a hyperbolic...

This paper presents a study of increasing the reliability of a small 1 kW installed photovoltaic system by using hydrogen storage technique.

With increased utilization of ultra-high-voltage power transmission systems, systematic noise assessment and condition monitoring schemes have been developed in recent years to address the environmental and safety issues involved. This paper summarizes the progress in these areas and outlines the directions...

Energy efficiency and power density become main qualitative indexes of power electronic systems. This paper deals with derivation of the optimal design of high frequency transformer, which forms very important part of the dc-dc converter. Design procedure focuses on the possibilities of converterïs power...

This paper deals with analysis of the two-phase interleaved DC-DC converter for bidirectional current flow between the input sources and three-phase inverter for the electric drive. The bidirectional non-isolated topologies of DC-DC converter are also mentioned. In the paper is analyzed the current ripple...

The paper deals with analysis and modelling of a new type of single-phase supplied AC/AC converter with two phase outputs. It consists of one-leg half-bridge matrix converter loaded by the resistive-inductive load in series connection. As harmonic analysis of the voltage of both phases gives very high...

Purposes: This study was designed to evaluate the effect of pre-inhalation of salbutamol aerosol(200?g) and injection speed on sufentanil-induced cough. Methods: 160 patients aged 25-62yr, ASA I-?, scheduled for various elective surgical procedures under general anesthesia were randomly allocated into...