公开(公告)号：US11955882B2

公开(公告)日：2024-04-09

申请号：US17774636

申请日：2020-11-06

申请人： AROS ELECTRONICS AB

发明人： Henrik Gullvén ,  Rolf Andersson ,  Thorbjörn Simonsson

IPC分类号： H02M1/32 ,  B60L3/00 ,  B60L15/00 ,  B60L50/60

CPC分类号： H02M1/322 ,  B60L3/003 ,  B60L15/007 ,  B60L50/60 ,  B60L2210/10 ,  B60L2240/529

摘要： An active discharge circuit for electric vehicle inverter, the active discharge circuit intended to be connected in parallel with a DC link capacitor connected between positive and negative lines of a DC power link, wherein the circuit comprises a dissipative current source, a switch connected in series with the current source between the DC lines, and a controller connected to the switch and arranged to apply an activation signal in dependence of a control signal, the activation signal placing the switch in a conducting state, wherein the current source is configured to draw a discharge current and dissipate any energy stored in the DC link capacitor when the switch is in the conducting state. As long as the switch is closed by the activation signal, the current source will draw a constant current and dissipate power, and the voltage across the DC link capacitor will decrease linearly.