Invention Grant
- Patent Title: DC inverter having reduced switching loss for paralleled phase leg switches
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Application No.: US15873198Application Date: 2018-01-17
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Publication No.: US10439485B2Publication Date: 2019-10-08
- Inventor: Zhuxian Xu , Chingchi Chen
- Applicant: FORD GLOBAL TECHNOLOGIES, LLC
- Applicant Address: US MI Dearborn
- Assignee: FORD GLOBAL TECHNOLOGIES, LLC
- Current Assignee: FORD GLOBAL TECHNOLOGIES, LLC
- Current Assignee Address: US MI Dearborn
- Agency: MacMillan, Sobanski & Todd, LLC
- Agent David B. Kelley
- Main IPC: H02M1/088
- IPC: H02M1/088 ; B60L50/51 ; H03K17/00 ; H02M7/5387 ; H02M1/00

Abstract:
An electrified vehicle propulsion system uses current feedback to modify gate drive signals to suppress voltage spikes and increase switching efficiency. A DC link having a link capacitor and a link inductance is connected to first and second converters. A first converter bridge has a first phase leg with first upper and lower switching devices, each switching device having a respective gate loop. A second converter bridge has a second phase leg with second upper and lower switching devices, each switching device having a respective gate loop. A plurality of gate drivers provide gate drive signals to respective gate loops for turning the respective switching devices on and off. A plurality of gate coils are provided, wherein each gate coil is connected in series between a respective gate driver and a respective gate loop. Each gate coil is respectively inductively coupled to the link inductance.
Public/Granted literature
- US20190222108A1 DC INVERTER HAVING REDUCED SWITCHING LOSS FOR PARALLELED PHASE LEG SWITCHES Public/Granted day:2019-07-18
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