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41 results on '"Mirafzal, B."'

27. A Time-Coordination Approach for Regenerative Energy Saving in Multiaxis Motor-Drive Systems.

Author

Kaviani, A. K., Hadley, B., and Mirafzal, B.

Subjects
ENERGY conservation, ENERGY management, MATHEMATICAL analysis, ACCELERATION (Mechanics), MOTOR drives (Electric motors), ENERGY dissipation
Abstract

An analytical approach for the management of regenerative energies in multiaxis servo-motor-drives, which can operate in parallel packaging/assembly/manufacturing lines, is presented in this paper. This energy management is achieved through a proper time-coordination between the speed commands of multiaxis drives. Moreover, the proposed approach significantly limits the peak value of the ac input current in these systems. It is mathematically proved that a time-delay can significantly increase the amount of utilized regenerative energy, and consequently decreases the amount of dissipated energy. In this paper, a set of closed-form formulas is developed for different acceleration-deceleration time ratios, where motor losses are neglected. The findings of this investigation were experimentally verified using a two-axis permanent-magnet motor-drive system, and the results are presented in this paper. The experimental results are in remarkable agreement with the developed closed-form formulas. [ABSTRACT FROM AUTHOR]

Published
2012
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41. Guest Editorial: Resilient and Compact Powertrains for On-the-Move Electrical Energy Technologies

Author

Patrick Wheeler, Giovanni Serra, Behrooz Mirafzal, Serra G., Wheeler P., and Mirafzal B.

Subjects
Engineering, Control and Systems Engineering, business.industry, Powertrain, Electric potential energy, Power system reliability, Aerospace electronics, Vehicle dynamics, Computational modeling, Electrical and Electronic Engineering, business, Automotive engineering
Abstract

The articles in this special section focus on resilient and compact power trains for on-the-move electrical energy techniques. On-the-move electrical energy technologies typically operate off the grid with no or minimal interaction with the utility network. These systems should therefore be light and compact to minimize power consumption and increase the operational time in transportation applications. They often have resilient structures because of rapidly changing environmental conditions, and the fact total failure in some systems might be catastrophic. To reduce the cost and enhance the performance of electrical energy technologies for transportation electrification, such as more electric aircraft, electric vehicles, drones, and robots, the industry is moving toward applications with more power electronics. High power density and resilient converters are critical enablers for the transportation industry to unlock significant improvements in system weight, energy consumption, total life-cycle costs, maintainability, and overall system reliability.

Published
2021

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