HCU37003703E Grounding circuit signal frame

HCU37003703E Surge voltage energy and 1/2LpI is proportional to, so reduce Lp is the main, can choose multi-layer positive and negative cross-over, wide bias-shaped iterative bus, including IGBT interconnections, and large capacitor connections, such as high-power inverters, such as busbar, are used in the above method, such as Rockwell A-B inverter is such a method to reduce the inductance of the power circuit. The inductance of the power circuit is reduced in this way.

HCU37003703E gate G drive or control signals and the main current share a current path, it will lead to a ground loop, which may appear to be the ground potential, but the actual potential value of a few volts, so that the original bias cut-off device, it may occur conduction, and cause false operation. Therefore, in high-power IGBT applications, or di/dt is very high, it is difficult to occur the occurrence of the above phenomenon, so the device does not have to use the capacity of the following three circuits

HCU37003703E is the power loss of IGBT during the turn-on or turn-off transition process. When the PWM signal frequency > 5KHZ switching losses will be very significant, so in the use of inverters, must be the correct choice of the size of the carrier frequency value, is an important issue. Specifically how to choose the value, please refer to the seventh issue of 2001 “inverter world” journal. This article is written by Zhang Xuanzheng, the title “inverter carrier frequency value of the correct choice of the basis” article.