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.

PMSM-driven satellite reaction wheel system with adjustable DC-link voltage

Abstract: This paper presents a digital signal processor-based permanent magnet synchronous motor (PMSM)-driven satellite reaction wheel with DC-link voltage adjustable according to speed and photovoltaic voltage. After the PMSM-driven reaction wheel is established, an improved current-controlled pulse-width modulation scheme is designed to yield precise sinusoidal winding current command tracking, and a simple, robust, model-following control scheme is designed to yield good dynamic speed response. To provide an adjustable and well-regulated DC-link voltage, DC/DC boost and DC/DC buck-boost front-end converters are established and compared. The stable chopping-controlled dynamic braking mechanism is also established.

Control apparatus and method for regenerative braking of eco-friendly vehicle

Abstract: A variable control apparatus and method of the amount of regenerative braking of a vehicle using a paddle shift are provided. The method includes sensing, by a controller, positive (+) and negative (−) shifting in a manual mode based on a signal from a shift-operating unit during regenerative braking with a drive (D) gear engaged while the vehicle travels. A regenerative braking torque map that corresponds to a selected gear is selected based on the signal from the shift-operating unit. In addition, regenerative braking of a driving motor is adjusted based on the torque value calculated from the selected regenerative braking torque map.

Power delivery co-ordination to meet driver’s demand in a mild hybrid vehicle with automated manual transmission

Abstract: In this paper a power delivery control strategy for a passenger mild hybrid vehicle is developed and described with simulation results The vehicle is equipped with integrated starter alternator (ISA) and automated manual transmission (AMT) The transmission and engine control units, and ISA torque control for boosting and regenerative braking are optimized according to the requirements of the power delivery from the vehicle power sources to the driven wheels, and the requirements of driverpsilas demand as well A gear-shifting strategy for AMT is developed to extract the AMT up-shift and down-shift maps These maps are utilized for proper gear-shifting and emulating the shifting strategy of a professional driver An ISA power management strategy is also proposed and described which considers the driverpsilas wheel torque demand as well as the state of charge (SOC) of the battery In the case of braking, the ISA produces braking force in parallel with the mechanical brake system A braking control unit is also presented that computes the mechanical and electrical braking forces required to meet driverpsilas braking force command The electrical braking captures the vehicle kinetic energy as much as possible without reducing the stability The feasibility of operation of the vehicle controller has been demonstrated by simulating the vehicle with a driver model

Regenerative braking state notification device

Abstract: PROBLEM TO BE SOLVED: To provide a regenerative braking state notification device which facilitates decision of whether the braking operation conducted by a driver improves energy efficiency. SOLUTION: An actual regenerative braking power display section 200 displaying actually generated regenerative braking power, a maximum regenerative braking power display line 202 displaying the maximum value of the regenerative braking power, and an over-braking power display section 204 displaying a difference between the ideal regenerative braking power to be fixed on the basis of a braking operation quantity and the actual regenerative braking power, are displayed in the same bar graph (a regenerative indicator). With the displaying of the over-braking power display section 204, a driver can recognize a sudden braking operation performed to the extent to increase the ratio of the friction braking power relative to the regenerative braking power, not fully covered with the regenerative braking force. Furthermore, the drive can recognize to what extent the braking operation is performed in haste, according to the magnitude of the braking power displayed on the over-braking power display section 204. COPYRIGHT: (C)2009,JPO&INPIT