{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9793352","patent":{"patent_number":"US-9793352","title":"IGBT assembly having saturable inductor for soft landing a diode recovery current","assignee":null,"inventors":[],"filing_date":"2011-06-02T00:00:00.000Z","publication_date":"2017-10-17T00:00:00.000Z","cpc_codes":["H01L","H01L","H02M","H02M","H01L","H01L","H01L","H01L","H01L"],"num_claims":26,"abstract":"A combination switch includes an Insulated Gate Bipolar Transistor (IGBT), an anti-parallel diode, and a saturable inductor. The diode and inductor are coupled in series between a collector and an emitter of the IGBT. The inductor is fashioned so that it will come out of saturation when a forward bias current flow through the diode falls below a saturation current level. When the diode current falls (for example, due to another combination switch of a phase leg turning on), the diode current initially falls at a high rate until the inductor current drops to the saturation current level. Thereafter, the diode current falls at a lower rate. The lower rate allows the diode current to have a soft landing to zero current, thereby eliminating or reducing voltage and/or current spikes that would otherwise occur. Multiple methods of implementing and manufacturing the saturable inductor are disclosed."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"IGBT assembly having saturable inductor for soft landing a diode recovery current","description":"A combination switch includes an Insulated Gate Bipolar Transistor (IGBT), an anti-parallel diode, and a saturable inductor. The diode and inductor are coupled in series between a collector and an emi","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9793352","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9793352","citation_suggestion":"Patentable. \"IGBT assembly having saturable inductor for soft landing a diode recovery current\" (US-9793352). https://patentable.app/patents/US-9793352","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9793352","json":"https://patentable.app/api/llm-context/US-9793352","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:46:01.804Z"}