Objective: Active devices with wired receive coils enable very fast and robust catheter tracking and also intravascular imaging, but potential RF heating of such active devices has so far prevented their clinical use. Recently, a transformer-based cable was presented that efficiently reduces RF heating for active devices [1]. Similar results were obtained with an approach based on diodes [2]. W...

Monitoring of winding faults is the most important item used to determine the maintenance status of a transformer. Commonly used methods for winding-fault diagnosis require the transformer to exit operation before testing and an external exciting signal, whether the transformer is malfunctioning or not. However, if an overvoltage signal can be regarded as a broadband excitation source for fault...

A technique that uses a wire loop as a medium for data communication is described. Signal in the loop is in the form of current. Communication circuits transmit or receive signal by using current transformers for coupling current signal in the loop. The circuit uses inductors and capacitors with formulae for maximizing signal at the carrier frequency. An important application of this technique ...

The paper presents common mode voltage analysis of single phase grid connected photovoltaic inverter. Many researchers proposed different grid tie inverters for applications like domestic powering, street lighting, water pumping, cooling and heating applications. Traditional grid tie PV inverter uses either a line frequency or a high frequency transformer between the inverter and grid. The tran...

The design of medium- to high-frequency power electronics transformer aims not only minimize the loss in windings and core, but its heat removal features should also allow optimal use both core copper. feature (e.g., thermal conduction) a is complex because there exist multiple centers. bulk total concentrated around small segment assembly where are overlaid. primary winding most constrained th...

The paper documents a new transformer model in ATPDraw called XFMR. This model handles 3-phase transformers with two or three windings. Autotransformers and all Wye and Delta couplings are supported. The model includes an inverse inductance matrix for the leakage description, optional frequency dependent winding resistance, capacitive coupling, and a topologically correct core model (3and 5-leg...

One of transient phenomenon that causes the mal-operation of the power transformer differential protection during the energization of a loaded power transformer is the ultra-saturation phenomenon. In this paper, a new model for investigating the ultra-saturation phenomenon during the energization of a loaded power transformer is presented and its effect on the differential protection of the pow...

Electricity substations and their associated transformers are necessary for community power needs. In NSW these substations are often located in rural areas where background noise is low. Noise ‘hum’ from the transformers can be an issue for residents located nearby to the substation, and the tonal and low-frequency nature of the noise can add to the annoyance. The NSW Industrial Noise Policy a...

Lumped Parameter Model is well known in solving high frequency signal propagation in high voltage transformer windings. At Southampton University, the modelling technique has been improvised and employed to solve partial discharge (PD) problem occurred within deep inside transformer windings. Firstly, a lumped capacitive parameter model was considered and secondly a transmission line lumped par...