The invention provides an inverter system with enhanced common source inductance generated at a gate driver. A multiphase inverter for an electric vehicle drive has a plurality of drivers to provide drive signals to respective gate loops of upper and lower transistors in the phase legs. A transformer has a secondary winding in a first gate loop of a first transistor in one phase leg and a primarywinding connecting a Kelvin-emitter of the first transistor to a Kelvin-emitter of a second transistor in the other phase leg. Switching transients of transistors are shortened because when gate signal is toggled to change a conduction state of a transistor in a first phase leg, a rate of current change in the first leg is sensed in a transformer primary winding connected across a stray inductanceof the first leg. A voltage proportional to the sensed rate is added to the gate signal via a transformer secondary winding, thereby increasing a common source inductance of the transistor.
本公开提供了“具有在栅极驱动器处生成的增强共源极电感的逆变器系统”。一种用于电动车辆驱动器的多相逆变器具有多个驱动器,以将驱动信号提供给相桥中的上部晶体管和下部晶体管的相应栅极回路。变压器在一个相桥中的第一晶体管的第一栅极回路中具有次级绕组,并且具有将所述第一晶体管的开尔文发射极连接到另一个相桥中的第二晶体管的开尔文发射极的初级绕组。晶体管的开关瞬变被缩短,因为当切换栅极信号以改变第一相桥中的晶体管的导电状态时,在跨所述第一桥的杂散电感连接的变压器初级绕组中感测到所述第一桥中的电流变化的速率。经由变压器次级绕组向所述栅极信号添加与感测到的速率成比例的电压,从而增加所述晶体管的共源极电感。
Inverter system with enhanced common source inductance generated at gate driver
具有在栅极驱动器处生成的增强共源极电感的逆变器系统
2020-06-05
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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 |
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