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

Claim 0:
1. A method for monitoring an online state of a bonding wire of an insulated gate bipolar translator (IGBT) module, comprising the following steps:
step 1: constructing a full bridge inverter circuit and a VCE online measuring circuit and connecting two input ends of the VCE online measuring circuit to a collecting electrode and an emitting electrode of an IGBT power module of the full bridge inverter circuit to realize a connection of the full bridge inverter circuit and the CF online measuring circuit;
step 2: establishing a three-dimensional data model of a healthy IGBT;
step 3: establishing a three-dimensional data model of an IGBT with a broken bonding wire;
step 4: optimizing a least squares support vector machine by adopting a genetic algorithm; and
step 5: estimating states of the three-dimensional data models obtained in the step 2 and the step 3 by utilizing the least squares support vector machine optimized.