How does regenerative braking actually recover energy?

 　　How does a regenerative braking system actually recover energy? Regenerative braking systems are a key technology for new energy vehicles to improve energy efficiency. The core principle is to convert the kinetic energy when the vehicle decelerates or brakes into electrical energy and store it, instead of consuming the energy completely through the friction pads generating heat, as in the case of traditional fuel vehicles.

　　When the driver releases the accelerator or presses the brake pedal, the vehicle’s control system immediately determines the driving intention. If there is a need to slow down, the system does not directly cut off the electric motor’s power supply, but rather redirects the current so that the electric motor, which originally drove the wheels, changes into generator mode.

　　The inertial rotation of the wheels drives the rotor of the motor to rotate, cutting the magnetic field lines in the stator and generating an induced current based on the principle of electromagnetic induction. This current is converted by the inverter into a DC current that matches the battery pack and is eventually charged back into the power cell. The entire process requires no additional energy input and relies solely on the vehicle’s own kinetic energy to complete the energy conversion.

　　The efficiency of energy recovery is affected by multiple factors. Firstly, the power generation efficiency of the motor, high-performance permanent magnet synchronous motor in the high-efficiency zone of the power generation conversion rate is higher, more kinetic energy can be converted into electrical energy. Second is the charging acceptance ability of the battery. If the battery is already close to full charge or the temperature is too low, its charging power will be limited, resulting in part of the energy not being recovered.

　　Regenerative braking systems not only improve energy utilisation, they also offer additional benefits. As a result of the reduced frequency of mechanical braking, wear and tear on brake pads and discs is significantly reduced, and maintenance costs are consequently reduced. The reverse torque generated during the energy recovery process assists in decelerating the vehicle, resulting in a smoother driving experience, especially on urban roads with frequent starts and stops.

　　How does regenerative braking actually recover energy? The integration of regenerative braking and intelligent driving systems is deepening as the technology evolves, and in the future it may be possible to further optimise the energy recovery strategy through Telematics data to achieve more efficient energy management.


https://qipeiying.com/powertrain/regenerative-braking.html

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