As for the propulsion system of electric vehicle, integrated motor and multi-gearbox is a suitable choice because of its low cost and improved performance, but the shifting process should be well controlled to ensure the shifting quality. This paper presents a control algorithm of active synchronization of motor. Based on electromagnetic equations of asynchronous motor, the model of field oriented control system is set up to demonstrate transient process. Then the dynamic model of integrated powertrain is presented to analyze properties during shifting. During active synchronization, the switch of control state of asynchronous motor is realized by S-Function and reference value is given considering acceleration consistency and torque shock. At the same time, corresponding torque and speed profiles of motor are presented. Next simulation models are developed to verify the effectiveness of the proposed control system. The simulation results illustrate that fast response and small speed error are achieved using active synchronization, which ensures reduced power loss and shifting comfort for electric vehicles. In addition, this control algorithm is beneficial not only for the removal of clutch, and structure simplification of the gearbox concerning non-synchronizer. By comparing with model without active synchronization, the proposed control algorithm is suitable for integrated powertrain applied to electric vehicles.
The control algorithm of active synchronization of motor in shifting process for electric vehicles
Regelungsalgorithmus für die aktive Motorsynchronisierung beim Schaltvorgang für Elektrofahrzeuge
2009
6 Seiten, 8 Bilder, 1 Tabelle, 7 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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