Soft Switching in Switched Inertance Hydraulic Circuits

Alexander C. Yudell, James D Van De Ven

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Switched inertance hydraulic systems (SIHS) use inductive, capacitive, and switching elements to boost or "buck" (reduce) a pressure from a source to a load in an ideally lossless manner. Real SIHS circuits suffer a variety of energy losses, with throttling of flow during transitions of the high-speed valve resulting in as much as 44% of overall losses. These throttling energy losses can be mitigated by applying the analog of zero-voltage-switching, a soft switching strategy, adopted from power electronics. In the soft switching circuit, the flow that would otherwise be throttled across the transitioning valve is stored in a capacitive element and bypassed through check valves in parallel with the switching valves. To evaluate the effectiveness of soft switching in a boost converter SIHS, a lumped parameter model was constructed. Simulation demonstrates that soft switching improves the efficiency of the modeled circuit by 42% at peak load power and extends the power delivery capabilities by 77%.

Original languageEnglish (US)
Article number121007
JournalJournal of Dynamic Systems, Measurement and Control, Transactions of the ASME
Volume139
Issue number12
DOIs
StatePublished - Dec 1 2017

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hydraulics
hydraulic equipment
Hydraulics
Networks (circuits)
throttling
Energy dissipation
switching circuits
Transition flow
Switching circuits
Zero voltage switching
acceleration (physics)
Power electronics
energy dissipation
transition flow
converters
delivery
high speed
analogs
electric potential
electronics

Cite this

Soft Switching in Switched Inertance Hydraulic Circuits. / Yudell, Alexander C.; Van De Ven, James D.

In: Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME, Vol. 139, No. 12, 121007, 01.12.2017.

Research output: Contribution to journalArticle

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