Energy amplification and compensation device for electric vehicle

Abstract

The invention discloses an energy recovery and compensation device for an electric vehicle and belongs to the field of electronic devices for electric vehicles. According to the device, three high-frequency transformer compensation branches are respectively connected to three motor phase lines between an original motor of the electric vehicle and a controller; a primary coil of a high-frequency transformer is connected in series with each phase line; a capacitor is connected in parallel with the primary coil; a secondary coil of the high-frequency transformer is connected with a diode rectifier; a coupling transformer compensation branch is connected in parallel with the three motor phase lines so as to lead out three connecting lines, controls the on/off of the phase lines and a coupling transformer through a relay and is connected with the diode rectifier; and the output ends of four compensation branches are connected in parallel or in series with an original storage battery through a charging bus. According to the device, an original circuit structure of the electric vehicle is not required to be changed, and the device is easy and convenient to mount; and moreover, a regenerative brake momentary charge current of the motor can be recovered during brake and downhill, the energy is saved, and the traveled distance is approximately doubled.

Description

technical field [0001] The invention relates to an electrical device for an electric vehicle, in particular to an energy amplification and compensation device for an electric vehicle. Background technique [0002] After the battery of the existing electric vehicle is charged, the electric energy is directly output to the brushless motor through the controller during the driving process of the vehicle, without any energy amplification and recovery compensation device, the energy consumption of the electric vehicle is large and the mileage is short. Moreover, when the electric vehicle starts, goes uphill, and accelerates, the output current increases instantaneously, which makes the working current of the battery and the motor unstable, and frequent high-current charging and discharging reduces the energy efficiency of the battery pack, easily damages the battery, and shortens its service life. life. Moreover, when the electric vehicle is braking or going downhill, the instan...

AI Technical Summary

Problems solved by technology

[0002] After the battery of the existing electric vehicle is charged, the electric energy is directly output to the brushless motor through the controller during the driving process of the vehicle, without any energy amplification and recovery compensation device, the energy consumption of the electric vehicle is large and the mileage is short

Moreover, when the electric vehicle starts, goes uphill, and accelerates, the output current increases instantaneously, which makes the working current of the battery and the motor unstable, and frequent high-current charging and discharging reduces the energy efficiency of the battery pack, easily damages the battery, and shortens its service life. life

Moreover, when the electric vehicle is braking or going downhill, the instantaneous charging current of the motor during regenerative braking is very large, which will damage the battery life. The energy recovered by this part cannot be fully stored, resulting in huge waste

The existing electronic brake is to directly short-circuit the phase line of the motor through the controller during driving, and use the electromagnetic resistance of the motor to achieve the purpose of braking. The energy generated by this electronic brake is all converted into heat energy and lost.

Existing electric vehicles must use a charger to transform the 220-volt power supply to charge, and cannot be charged directly at any time

Images