Siemens Energy, Inc.

Arkansas Power Electronics International, Inc.

Other

Cree Fayetteville, Inc.

Roberto Marcelo Schupbach

John Fraley

David J Mitchell

Bryon Western

Ramesh Subramanian

Anand A Kulkarni

Alexander B Lostetter

Edward R Roesch

Rod Waits

Brice McPherson

Cora Schillig

Jie Yang

Brad Reese

Edgar Cilio

Jared Hornberger

Alex Lostetter

Javier Antonio Valle-Mayorga

Ivonne Escorcia-Carranza

Khoa Minh Phan

Caleb Paul Gutshall

Cora Hitchman

Sharmila Mounce

John R Fraley

David J Mitchel

A turbine environment wireless transmitter for monitoring bearing health inside jet turbines. This transmitter has the ability to operate in 225 to 300 degree Celsius environments and monitor real time bearing temperature and vibration and transmit that data to a centralized system for processing. The system is powered by a built in thermal electric generator, which produces power in response to a thermal gradient across it. The information transmitted is used to monitor and diagnose a bearing operating parameters in real-time and predict a failure event before any damage occurs.

Autonomous temperature accelerometer sensor

A voltage regulator circuitry () adapted to operate in a high-temperature environment of a turbine engine is provided. The voltage regulator may include a constant current source () including a first semiconductor switch () and a first resistor () connected between a gate terminal (G) and a source terminal (S) of the first semiconductor switch. A second resistor () is connected to the gate terminal of the first semiconductor switch () and to an electrical ground (). The constant current source is coupled to generate a voltage reference across the second resistorA source follower output stagemay include a second semiconductor switch () and a third resistor () connected between the electrical ground and a source terminal of the second semiconductor switch. The generated voltage reference is applied to a gating terminal of the second semiconductor switch ().

Voltage regulator circuitry operable in a high temperature environment of a turbine engine

A circuitry adapted to operate in a high-temperature environment of a turbine engine is provided. A relatively high-gain differential amplifier () may have an input terminal coupled to receive a voltage indicative of a sensed parameter of a component () of the turbine engine. A hybrid load circuitry may be coupled to the differential amplifier. A voltage regulator circuitry () may be coupled to power the differential amplifier. The differential amplifier, the hybrid load circuitry and the voltage regulator circuitry may each be disposed in the high-temperature environment of the turbine engine.

Electronic circuitry for high-temperature environments

A circuitry () adapted to operate in a high-temperature environment of a turbine engine is provided. The circuitry may include a differential amplifier () having an input terminal () coupled to a sensing element to receive a voltage indicative of a sensed parameter. A hybrid load circuitry () may be AC-coupled to the differential amplifier. The hybrid load circuitry may include a resistor-capacitor circuit () arranged to provide a path to an AC signal component with respect to the drain terminal of the switch (e.g.,) of a differential pair of semiconductor switches, which receives the voltage indicative of the sensed parameter.

Hybrid load differential amplifier operable in a high temperature environment of a turbine engine

Chopper circuitry may be adapted to operate in a high-temperature environment of a turbine. A first semiconductor switch () may have a first terminal coupled to receive a first output signal from a first leg () of a differential amplifier (). A second switch () may have a first terminal coupled thru a first resistive element (R) to a second terminal of the first semiconductor switch. The first terminal of the second semiconductor switch may be coupled to receive thru a second resistive element (R) a second output signal from a second leg () of the amplifier. Switches () may be responsive to a switching control signal to respective gate terminals of the switches to supply an output signal, which alternates in correspondence with a frequency of the switching control signal from a first amplitude level to a second amplitude level, which effectively provides a doubling amplification factor.

Chopper circuitry operable in a high temperature environment of a turbine engine

A half bridge gate driving circuit for providing gate driving circuits in a bi-hecto celcius (200 degrees celcius) operating environment having multiple functions including combinations of multiple level logic inputs, noise immunity, fault protection, overlap protection, pulse modulation, high-frequency modulation with transformer based isolation, high-frequency demodulation back to pulse width modulation, deadtime generator, level shifter for high side transistor, overcurrent protection, and undervoltage lockout.

High temperature half bridge gate driver

In a telemetry system for use in an engine, a circuit structure () affixed to a moving part () of the engine is disposed for amplifying information sensed about a condition of the part and transmitting the sensed information to a receiver external to the engine. The circuit structure is adapted for the high temperature environment of the engine and includes a differential amplifier () having an input for receiving a signal from a sensor () disposed on the part. A voltage controlled oscillator () with an input coupled to the output of the amplifier produces an oscillatory signal having a frequency representative of the sensed condition. A buffer () with an input coupled to the output of the oscillator buffers the oscillatory signal, which is then coupled to an antenna () for transmitting the information to the receiver.

Wireless telemetry electronic circuitry for measuring strain in high-temperature environments

A circuit assembly () resistant to high-temperature and high g centrifugal force is disclosed. A printed circuit board () is first fabricated from alumina and has conductive traces of said circuit formed thereon by the use of a thick film gold paste. Active and passive components of the circuit assembly are attached to the printed circuit board by means of gold powder diffused under high temperature. Gold wire is used for bonding between the circuit traces and the active components in order to complete the circuit assembly (). Also, a method for manufacturing a circuit assembly resistant to elevated temperature is disclosed.

Wireless telemetry electronic circuit board for high temperature environments

A telemetry system for use in a combustion turbine engine () having a compressor (), a combustor and a turbine () that includes a sensor () in connection with a turbine blade () or vane (). A telemetry transmitter circuit () may be affixed to the turbine blade () with a first connecting material () deposited on the turbine blade () for routing electronic data signals from the sensor () to the telemetry transmitter circuit (), the electronic data signals indicative of a condition of the turbine blade (). An induction power system for powering the telemetry transmitter circuit () may include a rotating data antenna () affixed to the turbine blade () with a second connecting material () deposited on the turbine blade () for routing electronic data signals from the telemetry transmitter circuit () to the rotating data antenna (). A stationary data antenna () may be affixed to a static seal segmentadjacent the turbine blade () for receiving electronic data signals from the rotating data antenna ().

Wireless telemetry for instrumented component

Method for manufacturing a circuit for high temperature and high g-force environments

A circuit assembly () affixed to a moving part () of a turbine for receiving information about a condition of the part and transmitting this information external to the engine. The circuit assembly includes a high-temperature resistant package (A) that attaches to the part. A high temperature resistant PC board () supports both active and passive components of the circuit, wherein a first group of the passive components are fabricated with zero temperature coefficient of resistance and a second group of the passive components are fabricated with a positive temperature coefficient of resistance. The active components are fabricated with high temperature metallization. Connectors () attached to the PC board pass through a wall of the package (A) for communication with sensors () on the part and with an antenna () for transmitting data about the condition of the part to outside the turbine.

Wireless telemetry electronic circuit package for high temperature environments

A circuit affixed to a moving part of an engine for sensing and processing the temperature of the part. The circuit generates a signal representative of the temperature sensed by a thermocouple () and amplified by an amplifier (). A square wave oscillator () with a temperature sensitive capacitor (C) varies its frequency in response to changes of a local temperature of the circuit. A chopper (J) converts the output of the amplifier into an alternating current signal. The chopper is gated by the square wave oscillator and a second input is coupled to an output of the amplifier. Thus, the chopper has an output signal having a frequency representative of the local temperature and an amplitude representative of the thermocouple temperature, whereby the combined signals represent the true temperature of the part.

Wireless telemetry circuit structure for measuring temperature in high temperature environments

High temperature gate driving circuits with improved noise resistance and minimized loss are implemented with high temperature components with a reduced size magnetic isolation transformer. Input broad-pulse width modulated signals are converted to offsetting narrow pulses to cross the reduced size magnetic transformer minimizing isolation losses. One embodiment teaches time and voltage offset narrow single pulses that control a set and reset regeneration of the pulse width output on the secondary side of the transformer. Another embodiment teaches multiple concurrent voltage offset pulses to cross the transformer and charge a threshold capacitor for both filtering noise and controlling the pulse width regeneration on the secondary side of the transformer.

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Fayetteville, AR, United States of America

Roberto Marcelo Schupbach