access icon openaccess Multi-frequency averaging (MFA) model of a generic electric vehicle powertrain suitable under variable frequency of averaging developed for remote operability

Geographically distributed hardware-in-the-loop (HIL) testing has the potential to allow hybrid vehicle powertrain components (battery, motor drive, and engine) to be developed at geographically remote locations but tested concurrently and coupled. Inter-location internet communication links can allow non-ideal behaviour observed in a physical component in one location (e.g. an electrical drive) to be imposed on another physical component elsewhere (e.g. an ICE), and vice-versa. A key challenge is how to represent the behaviour of a remote, physical component under testing in a local HIL environment. Internet communications are too slow and unreliable to transmit waveforms in real-time and so one solution is to use a local ‘slave’ model whose behaviour and parameters are tuned based on observations at the remote location. This study proposes a multi-frequency averaging (MFA) slave model of an electric motor drive system for use in this application; it addresses a weakness in previously published work by extending the MFA model to variable frequency operation. The model was benchmarked against experimental operation (and its equivalent simulation model) in open-loop and closed-loop space vector pulse-width modulation control strategy, fixed and variable frequency operation. Results show significant reconciliation of model and experiment.

Inspec keywords: motor drives; hybrid electric vehicles; engines; closed loop systems; power transmission (mechanical); electric drives; PWM invertors

Other keywords: generic electric vehicle powertrain; electric motor drive system; multifrequency averaging slave model; geographically distributed hardware-in-the-loop testing; MFA model; multifrequency averaging model; geographically remote locations; remote component; variable frequency operation; equivalent simulation model; closed-loop space vector pulse-width modulation control strategy; hybrid vehicle powertrain components; local HIL environment; electrical drive; inter-location internet communication links; Internet communications

Subjects: Transportation industry; Drives; Transportation; DC-AC power convertors (invertors); Engines; Mechanical drives and transmissions

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