Regulacja prędkości obrotowej w napędzie elektrycznym "e-kit" dedykowanym do elektryfikacji małych samochodów osobowych i dostawczych

The papers deals with the method of speed control of Permanent Magnet Synchronous Motors (PMSMs) dedicated for all-electric vehicles. Typical electromechanical characteristic curves - so called traction characteristic curves of variable speed electric drives used in all-electric vehicles are presented and discussed. Two speed control zones can be distinguish in these traction characteristic curves: the constant torque zone and the constant power zone. The principles of PMSM operation in each of speed control zones are described. The constant power zone utilizes the flux weakening technology based on a constant-current-constant-voltage control strategy. The real traction characteristic curves calculated for so called E-Kit drive which is currently In development process in R&D Centre KOMEL are also presented in the paper and discussed.