Open Switch Fault Diagnosis in Three Phase Inverter Using Diagnostic Variable Method

Abstract

The reliability of power electronics system such as three phase inverter is important in various applications.

Lissajous Curve of an Auxiliary Winding Voltage Park Components for Diagnosing Multiple Open Switches Faults in Three Phase Inverter

“…Induction motor mathematical model with smoothed air gap and concentrated windings is based onThe matrix general electrical equations (1). This three phase model has been chosen due to the easy integration of asymmetrical faults.…”

“…Therefore, fault detection and diagnosis are needed. Most of these inverters use insulated gate bipolar transistors (IGBT), as the power device, because of their higher voltage and current ratings in addition to their ability to handle short-circuit currents for periods exceeding 10µs [1]. Their failures are due to electrical excess and thermal stress that are experienced in many applications.…”

Improvised direct torque control of a permanent magnet synchronous motor

“…The characteristic improvement is tested by changing the shape of the magnet and rotor. As PMSM is suitable for continuous duty operation, fault-tolerant inverter topologies and fault detection approaches were recommended to have a reliable system [3]- [6]. For PMSM operating at high temperatures and high loads, the effect of ripple on the motor and supply component is significant.…”

“…PMSM was modeled on the d-q axis by using a simple equation depicted in (1) up to (6). In the equation, the variables v stand for voltage, i stands for current, P stands for pole, ωr stands for rotor speed, ωs stands for electrical speed, mf stands for magnet flux, TL stands for load torque, J stands for inertial constant, B stands for friction constant, whereas Ψ stands for flux for each axis.…”

Lissajous Curve of an Auxiliary Winding Voltage Park Components for Diagnosing Induction Motor Inverter Defects

“…Therefore, fault detection and diagnosis are needed. It is estimated that among all types of faults in variable-speed ac drives in industry, about 38% of the faults are due to failures of power devices [1]. Most of these inverters use insulated gate bipolar transistors (IGBT) as the power device because of their higher voltage and current ratings and ability to handle short-circuit currents for periods exceeding 10µs.…”