General Electric Company

Melissa Freeman

Margaret Ann Wiza

Douglas John Link

Louis Martin Frigo

Michael Thomas Rose

Juan Antonio Sabate

Ruxi Wang

Thomas G McFarland

Andrew John Panos

Tao Wu

Eladio Clemente Delgado

Fei Xu

Fengfeng Tao

Xi Lu

Clyve Konrad Rosales Follante

Pengcheng Zhu

Andreas Ebel

Syedsaad Ali

Tanzania Samone Sewell

Scott Richard Weber

Scott Walterman

Randy Hladilek

Hyokwon Nam

Timothy Strait

Syed Saad Asif Ali

A system for removing energy from an electrical choke is provided. The system includes one or more cores, at least one inductive coupling, and a resistor. The one or more cores are configured to form part of the electrical choke by generating magnetic energy. The at least one inductive coupling is operative to convert the magnetic energy into electrical energy. The resistor is electrically connected to the at least one inductive coupling and operative to dissipate the electrical energy as heat.

System and method for removing energy from an electrical choke

A switching amplifier includes a power device and a processing device. The power device is configured for powering a load and is comprised of a plurality of switches. The processing device configured to calculate a switch junction temperature for a bonding wire in each switch based at least in part on a power loss of each switch; generate a first accumulated fatigue damage of the bonding wire in each switch based on the switch junction temperature; and generate an estimated remaining lifetime of the switching amplifier based on the first accumulated fatigue damages of the bonding wires in each switch.

Switching amplifier and method for estimating remaining lifetime of a switching amplifier

A method for supplying electrical power to a gradient amplifier that drives a gradient coil for a magnetic resonance imaging system is provided. The method includes predicting a gradient voltage required to drive the gradient coil for a scan based at least in part on a gradient coil model. The method further includes calculating a voltage set point for a power supply based at least in part on the predicted gradient voltage. The method further includes providing electrical power to the gradient amplifier via the power supply based at least in part on the calculated voltage set point. The gradient coil model is based at least in part on historical data acquired prior to the scan.

System and method for supplying electrical power to a gradient amplifier

A method that includes deriving a first power spectral density function of a signal input to a ripple cancellation filter; deriving a second power spectral density function of a signal concurrently output from the ripple cancellation filter; frequency shaping the first power spectral density according to a spectral rejection image of the ripple cancellation filter to obtain a test power spectral density; and indicating a degraded performance of the ripple cancellation filter in the event that the test and second power spectral density functions fail to match within pre-determined criteria.

Method and apparatus for non-invasive assessment of ripple cancellation filter

The present disclosure presents techniques to facilitate improving operation of an electrical system, which includes a bus structure that cascades multiple electrical devices. The bus structure includes a first outer conductive layer implemented as a positive layer; a second outer conductive layer implemented as a negative layer; a first intermediate conductive layer neighboring the first outer conductive layer; a second intermediate conductive layer neighboring the second outer conductive layer; and a third intermediate conductive layer neighboring the second intermediate conductive layer, in which the third intermediate conductive layer is implemented as an inter-device layer that facilitates electrically coupling at least two of the electrical devices in series. The first intermediate conductive layer is implemented as a negative layer and the second intermediate conductive layer is implemented as a positive layer to facilitate reducing stray inductance and/or increasing stray capacitance introduced in the electrical system during operation.

Cascaded electrical device bus structure systems and methods

An apparatus includes a self-coupled transformer, a first band stop filter and a tank circuit connected in series with the first band stop filter between first and second windings of the self-coupled transformer. An inductor of the tank circuit acts as an out-of-phase third winding of the self-coupled transformer.

Method and apparatus for dual notch ripple filtering

An apparatus that includes a power amplifier; a load that is operatively connected to be electrically driven from the power amplifier; and an impedance monitor that is configured to in real-time identify a favorable segment within an output waveform of the power amplifier, model the baseline power spectral density of a load driven by the power amplifier during the identified segment of the output waveform, sample an empirical power spectral density of the load during the identified segment of the output waveform, and indicate a load fault in the event that the empirical power spectral density deviates from the baseline power spectral density beyond at least one pre-determined error criteria.

Method and apparatus for active load impedance monitoring

Various methods and systems are provided for detecting an unplugged radio frequency (RF) coil in a magnetic resonance imaging (MRI) system. In one embodiment, a device for an RF coil comprises an alert generator, a power source, and a field-sensitive switch including an open state and a closed state, wherein the field-sensitive switch switches from the open state to the closed state responsive to sensing a magnetic field with a strength above a threshold, and wherein the field-sensitive switch in the closed state electrically couples the alert generator and the power source. In this way, an alert may be generated to notify an operator of an MRI apparatus of an unplugged RF coil.

Methods and devices for RF coils in MRI systems

Growing community of inventors

Oconomowoc, WI, United States of America

Melissa Freeman