POWER CONVERTER FOR ELECTRIC VEHICLE

PURPOSE:To realize positive detection of AC power interruption during regenerative brake operation regardless of various conditions of power system or the magnitude of brake power. CONSTITUTION:The power converter for electric vehicle comprises a converter 5 for converting secondary voltage of a tra...

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Bibliographic Details
Main Authors YOKONISHI TOSHIO, ISHIKAWA SAKAE, UJIIE AKIHIKO, NISHIO ATSUHIKO
Format Patent
LanguageEnglish
Published 18.02.1994
Edition5
Subjects
ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES
ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL
MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES
PERFORMING OPERATIONS
TRANSPORTING
VEHICLES IN GENERAL
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Summary:PURPOSE:To realize positive detection of AC power interruption during regenerative brake operation regardless of various conditions of power system or the magnitude of brake power. CONSTITUTION:The power converter for electric vehicle comprises a converter 5 for converting secondary voltage of a transformer 3 receiving AC single phase power into DC power, and an inverter 6 for inverting output from the converter 5 into AC three-phase power and performing rotation control of a motor 8. The power converter further includes means 10 for detecting voltage on the primary winding of the transformer 3, a band-pass filter 11 for extracting a specified frequency component from a detected voltage, means 12 for operating the difference between the output from the band-pass filter 11 and a voltage detected through the voltage detecting means 10, and a comparing means 14 which outputs an interruption detection signal of AC power supply when the absolute value of an output from the subtracting means 12 exceeds a preset value.
Bibliography:Application Number: JP19910224084