Topic
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.
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24 Apr 1987
TL;DR: In this article, a dynamic braking circuit for a universal motor is described, where a switching mechanism is used to reverse the orientation of the series field winding with respect to the rotor when power is removed.
Abstract: A dynamic braking circuit for a universal motor is disclosed. A switching mechanism is used to reverse the orientation of the series field winding with respect to the rotor when power is removed. Because the rotor acts as a generator when power is removed, it will generate current to the field winding. Because the orientation of the field winding has been reversed, the field winding will thus try to make the motor run in the opposite direction, thereby exerting a braking force on the motor. The amount of the braking force is limited by using a portion of a second winding to oppose the reversed action of the first winding.
12 citations
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18 Nov 2008TL;DR: In this paper, the brake system with regenerative braking function is described, and a special brake pedal is applied in this brake system, and the backstepping-based controller design technique is introduced with the estimated parameters.
Abstract: Regenerative braking is an important function for a hybrid electric bus with many stop-to-go drive conditions. Yet an accurate nonlinear model for the composite brake system in HEV and a nonlinear model-based control design for a series-parallel hybrid electric bus have not been fully studied. This paper describes the brake system with regenerative braking function, and a special brake pedal is applied in this brake system. A hybrid electric bus is inherently a nonlinear system with many uncertainties. Parameter estimation design is used to improve the effect introduced by the parametric uncertainties. The backstepping-based controller design technique is introduced with the estimated parameters, and the error dynamics is separated from the parameter adaptation. Experimental data are used for the demonstration simulation. The simulated output shows a good tracking performance of the practical braking vehicle speed, and the bus can stop at a bus station by regenerative braking. The effectiveness of the proposed controller design is illustrated with the adaptive system parameters.
12 citations
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20 Sep 1990TL;DR: In this article, a method for traction control of a vehicle, including detecting a slipping tendency of a drive wheel in a driven state, and controlling the braking force of the drive wheel brake device in an increasing and decreasing manner in accordance with the degree of the detected slipping tendency, is presented.
Abstract: A method for traction control of a vehicle, includes detecting a slipping tendency of a drive wheel in a driven state, and controlling the braking force of a drive wheel brake device in an increasing and decreasing manner in accordance with the degree of the detected slipping tendency, wherein a rapid increase mode of rapidly increasing the braking force of the drive wheel brake device and a slow increase mode of slowly increasing the braking force can be switched from one to the other, so that at an initial stage in increasing the braking force of the drive wheel brake device on the basis of the decision that the drive wheel is in an excessive slipping tendency, the braking force is increased in the rapid increase mode.
12 citations
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16 Sep 1998TL;DR: In this paper, the system has a controller (46) for controlling the overall braking torque, which consists of at least the frictional or regenerative braking torque; the controller operates when the total torque reaches an upper road surface frictional coefficient limit so as to null the regeneration braking torque and reduce the braking torque.
Abstract: The system has a controller (46) for controlling the overall braking torque, which consists of at least the frictional or regenerative braking torque. The controller operates when the total torque reaches an upper road surface frictional coefficient limit so as to null the regenerative braking torque and reduce the frictional braking torque.
12 citations