JPH05336610

• Main Authors: IWABORI MICHIO, YUYA KOSUKE, HOSHINO HIDEO
• Format: Patent
• Language: English
• Published: 17.12.1993
• Edition: 5
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; 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; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; VEHICLES IN GENERAL

PURPOSE:To improve comfortability by minimizing deterioration of accelerating/ decelerating performance of an electric vehicle due to idling or slip thereby suppressing operational delay. CONSTITUTION:The readhesion controller comprises a plurality of function generators 9 for storing the restricting amount or ratio of at least one of motor current command or frequency command as a function of the difference therebetween, a reference frequency selector 7 for selecting the lowest or highest frequency, respectively, during powering or braking as a reference frequency among the rotational frequencies of respective motors 2 detected through a pulse generator 3 and an r.p.m. operating unit 4, and a subtractor 8 for determining the difference between the reference frequency and the rotational frequency of the motor 2, wherein predetermined outputs are obtained from the function generators 9 depending upon each difference thus determined and each motor is controlled by restricting any one of commands therefor.