Induction Motor Drive System Performance Under a DC -Link Capacitor Short Circuit

Abstract

Induction motors are extensively deployed in industrial power systems due to their high durability, operational dependability, and consistent performance under diverse load and environmental conditions. A substantial number of these motors are interfaced with inverter-based drives functioning at standard line frequencies. By modulating drive parameters, the motor's operation can be tailored to meet specific design requirements. Consequently, the reliability of motor control systems utilizing variable speed drives play a critical role in maintaining process stability and efficiency in industrial automation systems. These electrical motors are intricate and susceptible to faults. Enhancing the operational reliability of motor control systems, it is imperative for researchers to comprehend how faults influence the entire drive system. This research focuses on the analysis of short-circuit failure modes occurring within the DC-link capacitor of an inverter-fed induction motor system. The study examines fault scenarios involving short circuits in the DC-link capacitor within an inverter-driven induction motor system. The effects of these faults are evaluated through simulation, with particular emphasis on their impact on the operational characteristics of the rectifier, inverter, and motor. Transient responses including current waveforms, electromagnetic torque, and rotor speed are analyzed to assess the system's dynamic behavior under fault conditions. An experimental case will be cited.