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.
SAFE ACTIVE DISCHARGE CIRCUIT FOR INVERTER IN VEHICLE
2022-12-08
Patent
Elektronische Ressource
Englisch
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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