Energy control method for hybrid power mining electric wheel dumper

Abstract

The invention relates to an energy control method for a hybrid power mining electric wheel dumper. The energy control method comprises the following steps that firstly, after the dumper is started, a wheel speed sensor of an electric wheel starts to work and inputs a wheel speed signal to an electric transmission control system to be judged; secondly, the electric transmission control system monitors the voltage of a direct current bus in real time; thirdly, an energy managing unit monitors the SOC of a super-capacitor auxiliary power source; fourthly, the energy managing unit monitors the SOC of the super-capacitor auxiliary power source again; fifthly, if the monitored SOC value of the super-capacitor auxiliary power source is no less than the set SOC maximum value, electric braking feedback energy of the electric wheel is consumed through a braking resistor, and if the monitored SOC value is smaller than the set SOC maximum value, the redundant electric braking feedback energy of the electric wheel is consumed by the braking resistor. The energy control method plays a peak clipping and valley filling role to enable a diesel engine to often work in a high efficiency zone, and meanwhile, the electric braking energy of the dumper can be recycled.

Description

technical field [0001] The invention relates to an energy control method of a hybrid mining electric wheel dump truck. Background technique [0002] At present, mining electric wheel dump trucks use high-power diesel engines to drive generators to generate electricity and drive electric motors to run, including diesel-electric power systems, electric transmission control systems, electric wheels, and supercapacitor auxiliary power supplies. The diesel-electric power system It includes a diesel engine and a synchronous generator. The diesel engine drives the synchronous generator to generate electricity. The diesel-electric power system provides power for the electric wheel and also charges the supercapacitor auxiliary power supply. The electric wheel includes a hub motor and a wheel speed sensor. The hub motor is installed on the In the wheel, the in-wheel motor is a DC motor, and it can also be an asynchronous motor. The wheel speed sensor detects the vehicle tire speed in ...

AI Technical Summary

Problems solved by technology

[0003] There is a hybrid mining electric wheel dump truck using supercapacitor auxiliary energy. Its energy control method is one of the technical difficulties of this vehicle. In the existing control strategy of supercapacitor hybrid vehicles, only for public transport vehicles , rail vehicles, excavators, such non-hub motor-driven hybrid vehicles, and the operating conditions of such vehicles are different from those of off-road mining electric wheel dump trucks, and the main operating conditions of mining electric wheel dump trucks It is continuous heavy-load uphill and continuous no-load downhill. The interval between charging and discharging the supercapacitor auxiliary power supply is long, and the limited space for supercapacitor layout makes it necessary to fully increase the utilization of the supercapacitor auxiliary power supply to meet the economy. The operating conditions of power buses and excavators determine that the charging and discharging cycle of the supercapacitor auxiliary power supply is relatively short. Part of the energy of the supercapacitor auxiliary power supply in rail vehicles comes from the power grid. The energy source of the supercapacitor auxiliary power supply is different from mine electric wheel Dump truck, so the existing energy control method of supercapacitor auxiliary power supply cannot be directly applied to mine electric wheel dump truck

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