Electromobile motor and supercapacitor control system based on DSR (Digital Signal Processor)

Abstract

The invention discloses an electromobile motor and supercapacitor control system based on a DSR (Digital Signal Processor), comprising a large-power battery, a supercapacitor, a motor driver, a DSP control circuit and a DC-DC converter, wherein the DC-DC converter is connected between the large-power battery and the supercapacitor, the motor is connected to the large-power battery through the motor driver, and the output of the DSP control circuit is used for controlling the DC-DC converter and the motor driver. The invention realizes the simultaneous control on the motor and the supercapacitor by using the DSP control circuit, improves the integral efficiency, simplifies the structure and the volume, improves the control precision, omits the mutual communication among a plurality of controllers, and saves the cost. Accurate charge and discharge management and control are simultaneously carried out on the battery and the supercapacitor, thereby prolonging the service life of the battery. The battery and the supercapacitor are detected and subjected to overvoltage protection or low-voltage protection under different voltages, thereby improving the reliability and the flexibility ofthe control system.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a DSP-based electric vehicle motor and supercapacitor control system. Background technique [0002] At present, energy conservation and environmental protection have become a new trend in the development of the automobile industry, especially the technology of electric energy-driven vehicles is widely used. The core of electric energy-driven vehicles is to use high-power lithium iron phosphate batteries to store electric energy and drive motors. However, the existing technology has the following problems: when the vehicle is started, the current is large; when the vehicle is braking, the braking energy is fed back into electric energy through the control of the frequency conversion controller, and the feedback current is very large at this time; the battery cycle is relatively short more, the battery is charged with every braking. However, the charging and discharging c...

AI Technical Summary

Problems solved by technology

However, the existing technology has the following problems: when the vehicle is started, the current is large; when the vehicle is braking, the braking energy is fed back into electric energy through the control of the frequency conversion controller, and the feedback current is very large at this time; the number of battery cycles is relatively small. more, the battery is charged with every braking

[0003] The supercapacitor and the high-power lithium iron phosphate battery form a hybrid electric energy power system, use the battery control switch 101 and the supercapacitor control switch 102 to switch the battery and the capacitor, so that the battery and the supercapacitor can respectively pass the frequency conversion controller 5 (ie, the motor driver) to the AC Motor power supply, there are the following problems: the characteristics of the battery and the super capacitor are different, the voltage is different, the battery control switch 101 and the super capacitor control switch 102 cannot be turned on at the same time, the battery and the super capacitor cannot supply power to the motor at the same time, and the balancing effect of the super capacitor cannot be fully exerted ; Switch 101, switch 102 and the motor are controlled by different controllers (motor controller 4 and DC power controller 3), the clock signal of the control needs to be synchronized, and the control accuracy is not high; the controllers need to communicate with each other, which takes up a lot Communication resources; the entire controller structure is also relatively complex

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