POWER AMPLIFIER FOR MAGNETIC BEARING DEVICE

PURPOSE:To simplify and stabilize the control system of a magnetic bearing device and reduce the cost thereof by providing a pulse-width modulation type power amplifier, in which output pulse width has the square root operation characteristic of an input signal. CONSTITUTION:In a power amplifier 4 f...

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Bibliographic Details
Main Author SHIRAO YUJI
Format Patent
LanguageEnglish
Published 15.03.1994
Edition5
Subjects
BASIC ELECTRONIC CIRCUITRY
BEARINGS
BLASTING
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRICITY
ELEMENTS OR CRANKSHAFT MECHANISMS
ENGINEERING ELEMENTS AND UNITS
FLEXIBLE SHAFTS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
ROTARY BODIES OTHER THAN GEARING ELEMENTS
SHAFTS
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:PURPOSE:To simplify and stabilize the control system of a magnetic bearing device and reduce the cost thereof by providing a pulse-width modulation type power amplifier, in which output pulse width has the square root operation characteristic of an input signal. CONSTITUTION:In a power amplifier 4 for a pulse-width modulation type magnetic bearing device, in which current, according to input voltage, is flowed to a load by varying output pulse width based on the size of input signal voltage with input and reference signals compared; a signal, in which a chopping wave signal is squared by a square operation part 15, as a reference signal.
Bibliography:Application Number: JP19920250592