Ppg Industries Ohio, Inc.

Siemens Aktiengesellschaft

Shelby Chun

Kwaku Koi Koram

James A Buckey

Allan Rex Hawk

Charles S Voeltzel

Allen R Hawk

Ralph Flaugher

Pascal Barguirdjian

Paolo Malapelle

Michel Haigron

Narendranath Nagarur

Alan Wright

Grigoriy Puchkarev

James Buckey

A drive system () includes a plurality of power cells () supplying power to one or more output phases (A, B, C), each power cell () having multiple switching devices (-) incorporating semiconductor switches, and a control system () in communication with the plurality of power cells () and controlling operation of the plurality of power cells (), wherein the control system () includes a system on chip () with one or more central processing units () and a field programmable gate array () in communication with the one or more central processing units ().

Control system for medium voltage variable frequency drive

Systems and methods in accordance with this invention provide a power converter including an input signal terminal, a first output signal at a first output signal terminal, and a controller. The controller is adapted to switch the first output signal from a first value to a second value, measure a voltage at the input signal terminal as a function of time, set a flag to a first flag value if the measured voltage falls below a predetermined value within a first predetermined time interval after the first output signal has been switched from the first value to the second value, otherwise set the flag to a second flag value, and save the flag in a memory. Numerous other aspects are also provided.

Apparatus and methods for input protection for power converters

A moisture detection system includes an electrical conductor disposed on a surface of a substrate, an oscillator for outputting an oscillator signal at a predetermined amplitude and a predetermined frequency, and a resonator circuit coupled to the electrical conductor and responsive to the oscillator signal for outputting a resonator signal having an amplitude related to a resonant frequency of the electrical conductor. A filter circuit responsive to the resonator signal can output a rectified and filtered signal, and an analog-to-digital converter responsive to the rectified and filtered signal can output a digital signal related to the rectified and filtered signal. A sensor can be provided having a property that varies as a function of a temperature at or adjacent the electrical conductor. A controller can be responsive to the digital signal and the property of the sensor for causing another system to operate as a function thereof.

Temperature compensated windshield moisture detector

A moisture detection system includes a moisture detector having a first electrical conductor, a first substrate having the first electrical conductor disposed on one surface thereof, a spacing layer coupled to the other surface of the first substrate, a second substrate having one surface thereof coupled to a surface of the spacing layer opposite the first substrate, and an electrically conductive layer disposed on a surface of a substrate opposite the spacing layer. A second electrical conductor can be disposed on the same surface of the first substrate as the first electrical conductor. The first and second electrical conductors can define interdigitated fingers. Circuitry is provided for stimulating the first electrical conductor with a predetermined frequency oscillator signal and for outputting a control signal that is responsive to the response of the first electrical conductor to the oscillator signal and an amount of moisture adjacent the first electrical conductor.

Multi-layer windshield moisture detector

A moisture detector can include a first elongated conductor disposed on a substrate. The first conductor can define a zigzag path between the opposite ends thereof. A second conductor can also be disposed on the substrate at least partially surrounding the first conductor. The second conductor can define between opposite ends thereof a zigzag path having a portion thereof that is positioned in substantially spaced parallel relation with the zigzag path of the first conductor along the sides thereof. A power conductor disposed on the substrate can be electrically connected to the first conductor intermediate the ends thereof via a gap defined between the ends of the second conductor. Ground conductors disposed on the substrate can be electrically connected to the ends of the second conductor. A temperature sensor can be utilized to correct the response of the moisture detector for temperature.

Windshield moisture detector

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Mt. Lebanon, PA, United States of America

Shelby Chun