{"paper":{"title":"Motional-Current-Sensing Method and Simplified Closed-Loop Control Strategy for Piezoelectric-Resonator-based DC-DC Converters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"A ring-dot shaped piezoelectric transformer senses motional current to enable simplified closed-loop control and ZVS in PR-based DC-DC converters.","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Linbo Shao, Liyan Zhu, Zhiyang Cao","submitted_at":"2026-05-14T18:00:09Z","abstract_excerpt":"Piezoelectric resonators (PRs) have been seen as a competitive alternative to magnetic components. In PR-based converters, the motional current (in the LC series branch of the equivalent circuit) is vital for control proposes but cannot be measured directly. The difficulties to detect the zero-crossing points or to measure the amplitude of the motional current has been one of the most dominating obstacles that complicates the control strategies and limits the frequency range of the PR-based converters. This work discusses a ring-dot shaped piezoelectric transformer (PT) based motional current "},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"It is physically proven that the proposed method is robust with various non-ideal factors of the piezoceramic and circuit implementation, and experiments verify that the approach realizes ZVS for all transitions within a switching cycle with reduced hardware and software resources.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The ring-dot shaped piezoelectric transformer can be added without disturbing the main resonator's motional current or introducing new losses or delays that would invalidate the sensing signal; this premise enters in the description of the sensing method and its claimed robustness to non-ideals.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Ring-dot PT sensing of motional current supports simplified ZVS control in piezoelectric-resonator DC-DC converters with low hardware overhead.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A ring-dot shaped piezoelectric transformer senses motional current to enable simplified closed-loop control and ZVS in PR-based DC-DC converters.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"b251f557b2160af527781967a25ae99d3564d836e6951cce2cf198bae8f812ae"},"source":{"id":"2605.15279","kind":"arxiv","version":1},"verdict":{"id":"ac34cd70-ea62-462c-aa72-b1ec863793cf","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T16:03:56.985528Z","strongest_claim":"It is physically proven that the proposed method is robust with various non-ideal factors of the piezoceramic and circuit implementation, and experiments verify that the approach realizes ZVS for all transitions within a switching cycle with reduced hardware and software resources.","one_line_summary":"Ring-dot PT sensing of motional current supports simplified ZVS control in piezoelectric-resonator DC-DC converters with low hardware overhead.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The ring-dot shaped piezoelectric transformer can be added without disturbing the main resonator's motional current or introducing new losses or delays that would invalidate the sensing signal; this premise enters in the description of the sensing method and its claimed robustness to non-ideals.","pith_extraction_headline":"A ring-dot shaped piezoelectric transformer senses motional current to enable simplified closed-loop control and ZVS in PR-based DC-DC converters."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.15279/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T16:31:18.380543Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T16:16:18.160044Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T14:41:54.252498Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T13:33:22.798531Z","status":"skipped","version":"1.0.0","findings_count":0}],"snapshot_sha256":"5764a3726d171e711b47700f0ba151a3821945aad4ad63483e597750e8343b16"},"references":{"count":38,"sample":[{"doi":"","year":2023,"title":"Opportunities, Progress, and Challenges in Piezoelectric-Based Power Electronics,","work_id":"ebf410c9-7c34-4093-97cd-a6fbfecaff06","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2021,"title":"Enumeration and Analysis of DC–DC Converter Implementations Based on Piezoelectric Resonators,","work_id":"53569dc9-c9a5-42c1-a454-1208ab9043d3","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2023,"title":"A Piezoelectric-Resonator-Based DC–DC Converter Demonstrating 1 kW/cm Resonator Power Density,","work_id":"f85a6403-c189-4c44-8898-827d3039824f","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2023,"title":"A Series/Parallel Magnetic-Less Step- Down Converter based on Piezoelectric Resonators,","work_id":"b9335ceb-2091-4094-af78-daf8414b71f0","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2021,"title":"Fixed-Frequency Control of Piezoelectric Resonator DC-DC Converters for Spurious Mode Avoidance,","work_id":"1178422f-9757-496c-88cb-4662e5285249","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":38,"snapshot_sha256":"c7860b5db94701f5cfd559a9ea327e7af1778f25f290eae7090a3fa2f067046a","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"e696784e17ae44df4909800b1adf95db4bbf3e8c447ac69b75721c0f2e390066"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}