Anti–drag braking control technology for electric drive dump truck

The power transmission system of electric wheel vehicle with "Power generator-diode rectifier-inverter-traction motor" can achieve part of the braking energy recycling and reduce fuel consumption through the reverse flow of energy in the downhill braking conditions. For AC-DC-AC transmission system of electric wheel vehicles. In order to achieve the engine anti-drag starting smoothly through the introduction of the theory of Engine Anti-drag Braking and the observation of the rotor frequency by external speed sensor, in addition to that zero-crossing detection phase method to achieve the stator rotating magnetic field and rotor speed synchronization purposes. Through use the rectifier inverter module to achieve energy bi-directional transmission and to achieve engine anti-drag when the vehicle goes downhill slowly. In the article, design of engine brake anti-drag control system and the establishment of anti-drag brake power calculation mathematical model, also build the anti-drag test platform of the engine to verify the control system. The experimental results show that the proposed control scheme for the start of the inverter is simple and reliable, which provides the theoretical basis and experimental data for the actual vehicle design. © 2021, Editura ELECTRA. All rights reserved.