Dynamic braking

About: Dynamic braking is a research topic. Over the lifetime, 3472 publications have been published within this topic receiving 34897 citations. The topic is also known as: Rheostatic brake.

Regenerative brake system reset feature and adaptive calibration for hybrid and electric vehicles

Abstract: In a vehicle equipped for regenerative and non-regenerative braking, regenerative braking only is applied to predetermined wheels in response to braking demand when the driver attempts to slow the vehicle at a first rate (

Brake controlling apparatus for electric vehicle

Abstract: A brake controlling apparatus for electric vehicles provided with a transmission between an electric motor and wheels. Regenerative brake control furnishes a regenerative braking force to the vehicle. A transmission control switches a stage of gear of the transmission the basis of driver operation. A friction brake control furnishes a friction braking force to the vehicle by controlling a friction brake. During gear shifting control, the regenerative brake control sets a regenerative torque essentially to zero, and the friction brake control supplements the regenerative braking force that was furnished to the vehicle prior to gear shifting control with the friction braking force. Therefore, there is no drop in deceleration during gear shifting control, even if the driver downshifts during regenerative braking. Smooth gear shifting is then possible.

Realization of Anti-Lock Braking Strategy for Electric Scooters

Abstract: This research studies a novel method of realizing a nonmechanical antilock braking system (ABS) controller for electric scooters (ESs) based on regenerative, kinetic, and short-circuit braking mechanisms. In which, a boundary layer speed control is proposed for a guarantee of the optimal slip ratio between tires and road surface. The antilock braking controller, combined with this controller, drives a low-side driving circuit to induce either an open-circuit or a short-circuit loop on the motor stator's coil to a load; it thus produces braking actions analogous to those in the conventional ABS control. The proposed ABS controller is practically realized. Improvement of the braking performance for the ABS action is further addressed via real-world experiments.

Integrated control of braking energy regeneration and pneumatic anti-lock braking

Abstract: This paper mainly focuses on integrated control of the brake system of a hybrid electric vehicle, i.e. the integration of friction braking and regenerative braking during anti-lock braking control and series brake blending during normal deceleration. Based on a series regenerative braking system, the structure of an integrated brake system is proposed. The models of each part of a hybrid electric bus are built in MATLABAE Simulink, taking authorized articles as references. A test bench with the original pneumatic brake system of a bus is also built to carry out hardware-in-the-loop (HIL) tests of the integrated brake system and to study the characteristics of the system better. The integrated control strategy is proposed on the basis of a pneumatic anti-lock braking strategy. Simulation results show that the participation of regenerative braking in the anti-lock braking control can be beneficial to both the ride comfort and the braking performance of the vehicle. HIL test results validate the resul...

Electric vehicle with battery regeneration dependant on battery charge state

Abstract: An electric vehicle is controlled to conform its operation to that of a conventional internal-combustion-engine powered vehicle. In some embodiments, the charging of the batteries by the auxiliary source of electricity and from dynamic braking is ramped in magnitude when the batteries lie in a state of charge between partial charge and full charge, with the magnitude of the charging being related to the relative state of charge of the battery. The deficiency between traction motor demand and the energy available from the auxiliary electrical source is provided from the batteries in an amount which depends upon the state of the batteries, so that the full amount of the deficiency is provided when the batteries are near full charge, and little or no energy is provided by the batteries when they are near a discharged condition. At charge states of the batteries between near-full-charge and near-full-discharge, the batteries supply an amount of energy which depends monotonically upon the charge state. Charging of the batteries from the auxiliary source is reduced during dynamic braking when the batteries are near full charge. Control of the amount of energy returned during dynamic braking may be performed by control of the transducing efficiency of the traction motor operated as a generator.