Patent ID: 11874341
Assignee: HEFEI UNIVERSITY OF TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 1:
2. The method for monitoring the online state of the bonding wire of the IGBT module according to claim 1, wherein a specific method for constructing the full bridge inverter circuit in the step 1 comprises:
constructing a Sinusoidal Pulse Width Modulation (SPWM) control circuit first, setting a dead time of the SPWM control circuit, and then constructing a gate level driving circuit, wherein the gate level driving circuit is modulated by the SPWM control circuit, an input end of the gate level driving circuit is connected with an output end of the SPWM control circuit, and an output end of the gate level driving circuit is connected with a gate electrode of the IGBT power module; the full bridge inverter circuit comprises four bridge arms, and each of the bridge arms is composed of one SPWM control circuit, one gate level driving circuit, one IGBT power module and one diode; one end of a load of the full bridge inverter circuit is connected between the IGBT power modules of two adjacent bridge arms and another end of the load is connected between the IGBT power modules of another two adjacent bridge arms;
and then constructing the VCE online measuring circuit, and finally connecting two input ends of the VCE online measuring circuit to the collecting electrode and the emitting electrode of the IGBT power module of one of the bridge arms of the full bridge inverter circuit.