Regenerative Braking

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regenerative braking

[rē′jen·rəd·iv ′brāk·iŋ]
A system of dynamic braking in which the electric drive motors are used as generators and return the kinetic energy of the motor armature and load to the electric supply system.

Regenerative Braking


an electric braking system for modes of transportation operated by electricity, for instance, electric trains and streetcars, or for industrial electric drives. Electrical energy is regenerated, or balanced, by converting the mechanical energy of the transportation system or electric drive into electrical energy, which is returned to the power line.

Regenerative braking is based on the reversibility of electrical machines. During regenerative braking a traction motor operates as a generator and creates the necessary drag torque on the shaft, which provides for the braking of the drive system. Electrical energy is produced by a motor-generator either from the potential energy of the electric transportation system as it moves down a grade at a constant speed or from the kinetic energy produced as the drive system is decelerated. Regenerative braking represents a considerable saving in electrical energy. It is most effective on larger modes of transportation, for example, on electric locomotives that operate on main lines, on suburban electric trains, and on modern trolleybuses.

A regenerative braking system must meet a number of special requirements because only generators with dropping external characteristics can be used. Therefore, traction motors with series excitation are switched over to separate excitation for regenerative braking.


References in periodicals archive ?
Hence regenerative brake cooperates with friction brake to satisfy the total braking demand.
Benefiting from the relatively individual structure of four wheel cylinders, EESP can realize various brake functions of hydraulic brake, cooperative regenerative brake and ABS/ESP function.
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The Regenerative Cooperative Brake System calculates braking force generated by brake pedal operation and controls the regenerative brake force to convert kinetic energy into electric energy, optimizing energy regeneration.
Only a small proportion of the road fleet has regenerative brakes, which drive a generator that converts the kinetic energy into electricity for use during subsequent acceleration.
But with the new regenerative brakes on electric and hybrid cars, it may no longer be such a stupid maneuver.
The vehicle features a range of fuel-saving technologies, including stop/start functionality that shuts down the engine at stop signs and traffic lights, regenerative brakes and an electric motor.
Regenerative brakes are used to reclaim energy that normally dissipates as does heat in a conventional break.
Toyota ended days of speculation on Tuesday when it recalled more than 400,000 hybrid models, including the latest version of its iconic Prius, to rectify a problem with the regenerative brakes that help charge the cars' electric batteries.
The model features regenerative brakes and standard hydraulic brakes.

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