In this paper a new technique for broken rotor bars diagnosis in induction machine at low load and non stationary state is proposed. The technique is used in order to remedy the problem from using the classical signal-processing technique FFT by analysis of stator current envelope. The proposed method is based from using discrete wavelet transform (DWT) and Hilbert transform. The Hilbert transf...

Since most of our industries use induction motors, it is essential to develop condition monitoring systems. Nowadays, have power quality issues such as sag, swell, harmonics, and transients. Thus, a system should the ability detect various faults, even in presence issues. Most fault diagnosis methods proposed earlier misidentified faults caused fail because misclassification due quality. The me...

The fault diagnosis of electrical machines during startup transients has received increasing attention regarding the possibility detecting faults early. Induction motors are no exception, and motor current signature analysis become one most popular techniques for determining condition various components. However, in case inverter powered systems, a is difficult to determine from stator because ...

<span>The main aim of this work is to analyze the input current waveform for a single-phase induction capacitor-run motor (SIMCR) detect faults. Internal and external faults were applied SIMCR was measured. An armature (broken rotor bar) bearing SIMCR. A microcontroller used record signal MATLAB software it with different types fault varying load operations. Various values running capacit...

The numerous qualities of squirrel cage induction machines enhance their use in industry. However, various faults can occur, such as stator short-circuits and rotor failures. In this paper, we use a technique based on the spectral analysis of stator current in order to detect the fault in the machine: broken rotor bars. Thus, the number effect of the breaks has been highlighted. The effect is h...

Abstract: Induction motors are the dominant components in industrial processes involving electromechanical energy conversion. Safety, reliability and efficiency are major concerns in modern induction motor applications. Since detecting faults on time could avoid costly unscheduled shutdowns, in recent years there has been an increased interest in induction motor fault detection and diagnosis. I...

The requisite of direct-on-line (DOL) starting for various applications in underground mines subjects the rotor bars heavy-duty squirrel cage induction motors (SCIMs) to severe stresses, resulting sustained fault bars, unlike where mostly reduced voltage is preferred. Furthermore, SCIMs working are also affected by unforeseen frequency fluctuations. Hence, paper proposes a discrete wavelet tran...

This year marks the 40th anniversary of the first state (Massachusetts) to implement a no-fault law. Between 1971 and 1975, the District of Columbia and 15 states followed suit. During the 1970s, the U.S. Congress also considered, but failed to adopt, a national no-fault law. Since 1975, however, no state has adopted a no-fault law, due in substantial part to the opposition of the trial bar and...