Insulated gate bipolar translator (IGBT) driving cable broken-line detection circuit

• Main Authors: ZENG JIANYOU, XIA QUANBO, ZHANG FENGZHUN
• Format: Patent
• Language: Chinese; English
• Published: 02.11.2011
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The utility model relates to an insulated gate bipolar translator (IGBT) driving cable broken-line detection circuit, which comprises a pulse-width modulation (PWM) signal output circuit, a driving isolation circuit, a driving separation circuit, a level conversion circuit, an optical coupling isolation circuit and a signal sending circuit, wherein the PWM signal output circuit sends out PWM driving signals, the driving isolation circuit drives an IGBT according to the PWM driving signals, the driving separation circuit respectively detects broken-line signals of each IGBT driving cable, the level conversion circuit converts the broken-line signals into constant level signals, the optical coupling isolation circuit converts the constant level signals into feedback signals, the signal sending circuit sends out the feedback signals, the PWM signal output circuit is connected with the driving isolation circuit, the driving isolation circuit is connected with the driving separation circuit, the driving separation