CONTROLLER FOR ELECTRIC VEHICLE

• Main Authors: HATANO MICHIHIRO, NODA TOMOHITO, SUEYOSHI OSAMU
• Format: Patent
• Language: English
• Published: 09.04.1993
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MEASURING; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; PERFORMING OPERATIONS; PHYSICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING; TRANSPORTING; VEHICLES IN GENERAL

PURPOSE:To enhance total traction force of vehicle by eliminating imbalance between vehicles due to different wheel diameter between a plurality of driving shafts and elevating the level of adhesion coefficient of each driving shaft. CONSTITUTION:Driving motor for each shaft is controlled individually by means of a corresponding inverter. For example, an inverter INV1 controls only the driving motor IM1 for first shaft. A slip frequency operating means 14 in the inverter INV1 receives signals from first and second speed sensors PG1, PGA fixed, respectively, to a drive wheel and a driven wheel and operates an optimal slip frequency fs1 corresponding to the wheel diameter of the first shaft. Consequently, an inverter output frequency for producing a desired step face torque can be obtained.