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Kinetic energy recovery system design and control of the braking vehicle system

Alamili, Adnan 2019. Kinetic energy recovery system design and control of the braking vehicle system. PhD Thesis, Cardiff University.
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Abstract

This PhD thesis presents a simulation of the dynamic energy recovery with an experimental-based model of the braking process. Accordingly, it describes the steps taken to develop a small-scale representation of the designed testing equipment, which was built within the laboratory boundaries to simulate the natural system. Moreover, it demonstrates the experimental probing and mathematical modelling of the system from an electronic perspective as well as in the mechanical perception as ready-made (black box) models. Meanwhile, the designed system shows an accurate representation in simulation, which was verified experimentally. In this study, energy recovery with two distinct storage units, especially, ultra-capacitors (UCs) and battery energy storage systems (ESS) was considered as an alternative energy source with propulsion strategies to assess their effect on storing and generating electricity from the braking process. A simulation was determined to signal the system behaviour for different operating scenarios. Consequently, the voltage generated by a permanent magnet brushless direct current (PMBLDC) motor of the test network, when used as a generator in the braking operation, was used to study the impact of the uncontrolled charging loads (batteries and UCs) on the system performance in the braking process. Furthermore, this research has proposed a new paradigm and regenerative braking (RB) algorithm. Taking the necessary information about the system from the flow rate correlated with two connected reservoirs to represent the charge flow rate in the RB mechanism. The dual tank's design was developed and used to describe the UCs’ and the generator as a storage model. The variable generated voltage during the landing and braking process determines an important term, which is the generator capacity concerning the UCs’ capacity. While modelling and analysis were primarily based on experimental results, many cases were examined to manage the best representation of the design. The outcomes were identified and discussed for both energy recovery II and downtime, which satisfy the design requirements and provide an accurate result regarding system performance.

Item Type: Thesis (PhD)
Date Type: Completion
Status: Unpublished
Schools: Engineering
Uncontrolled Keywords: Regenerative braking (RB); Experimental-based model; Energy storage unit; Ultracapacitors (UCs); Battery energy storage unit; Ready-made (black box) models; Correlated tanks.
Date of First Compliant Deposit: 10 December 2020
Last Modified: 10 Dec 2020 09:58
URI: http://orca-mwe.cf.ac.uk/id/eprint/136916

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