Invention Grant
- Patent Title: IGBT assembly having saturable inductor for soft landing a diode recovery current
-
Application No.: US13134297Application Date: 2011-06-02
-
Publication No.: US09793352B1Publication Date: 2017-10-17
- Inventor: Kyoung Wook Seok , Joseph James Roosma
- Applicant: Kyoung Wook Seok , Joseph James Roosma
- Applicant Address: US CA Milpitas
- Assignee: IXYS Corporation
- Current Assignee: IXYS Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Imperium Patent Works
- Agent T. Lester Wallace; Amir V. Adibi
- Main IPC: H01L29/66
- IPC: H01L29/66 ; H01L29/10

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.
Information query
IPC分类: