Technical Paper
Research on the Control Systems for Hybrid and Electric Powertrains
2024-04-09
2024-01-2786
DHT hybrid transmission assembly control system discussed in this paper includes hydraulic control, drive mode switching control, shift control, dual motor control, clutch and motor thermal management. Hydraulic control includes torque-pressure conversion. Including clutch pressure kp adaption, clutch gain adaption, clutch oil filling time adaption. Shift control includes shift type decision, shift timing control, shift torque exchange process control, shift inertia process based on motor intervention. Thermal management includes clutch flow and motor flow distribution. Motor control include the current control, mode control and boost strategy of permanent magnet synchronous motor in dual hybrid system, which has good stability and robustness. Current control includes current vector control, MTPA control, flux weakening control, PI current control and SVPWM control.