Methods to Identify Intermittent Electrical and Mechanical Faults in Permanent Magnet AC Drives Based on Wavelet Analysis

Zanardelli, W.G.; Strangas, Elias G.

doi:10.1109/vppc.2005.1554549

“…2c). The currents in remaining healthy phases can be calculated from (13). The phase currents and static torque of the machine under this condition is presented in Fig 7(a) and 7(b) respectively.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The Pulsating torque T f obtained both from equation (8) and FEA presented in Fig 8a are in good agreement with each other. The information of the pulsating torque T f can be used in (9) and (13) to obtain the current in the remaining healthy phases required to produce the desired output torque. The current waveforms of the healthy phases are presented in Fig 8 (b).…”

Section: Simulation Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Disturbance Free Operation of Permanent Magnet Motor Drives Under Short Circuit Faults Using Center-Split Winding

Dwari

¹

,

Parsa

²

2007

2007 IEEE Industry Applications Annual Meeting

0

View full text Add to dashboard Cite

This paper studies permanent magnet (PM) motor drives with centre-split stator windings and auxiliary switches. By proper control algorithm, the proposed configuration guarantees continuous operation under various short-circuit conditions. Each of the stator phases is split at the center into two windings having equal number of turns and a common magnetic axis. Auxiliary switches are used to break the fault current path or to isolate the faulty winding. Under short-circuit fault condition; the current in the healthy half of the phase winding is controlled to cancel the rotor magnetic flux linkage of the shorted turns in the faulty half of the winding belonging to the same phase. This diminishes the detrimental fault currents in the shorted turns and allows the drive to continue operation under faulty condition. The currents in the healthy phases are controlled properly to generate the desired output torque. In this work, an optimal fault-tolerant control method is presented for controlling the healthy phase currents of a general n phase machine. Simulation results of a five phase PM machine are presented for verification of the proposed strategy.

show abstract

“…The Pulsating torque T f obtained both from equation (8) and FEA presented in Fig 8a are in good agreement with each other. The information of the pulsating torque T f can be used in (9) and (13) to obtain the current in the remaining healthy phases required to produce the desired output torque. The current waveforms of the healthy phases are presented in Fig 8 (b).…”

Section: Simulation Resultsmentioning

confidence: 99%

Disturbance Free Operation of Permanent Magnet Motor Drives Under Short Circuit Faults Using Center-Split Winding

Dwari¹,

Parsa²

2007

2007 IEEE Industry Applications Annual Meeting

1

0

View full text Add to dashboard Cite

This paper studies permanent magnet (PM) motor drives with centre-split stator windings and auxiliary switches. By proper control algorithm, the proposed configuration guarantees continuous operation under various short-circuit conditions. Each of the stator phases is split at the center into two windings having equal number of turns and a common magnetic axis. Auxiliary switches are used to break the fault current path or to isolate the faulty winding. Under short-circuit fault condition; the current in the healthy half of the phase winding is controlled to cancel the rotor magnetic flux linkage of the shorted turns in the faulty half of the winding belonging to the same phase. This diminishes the detrimental fault currents in the shorted turns and allows the drive to continue operation under faulty condition. The currents in the healthy phases are controlled properly to generate the desired output torque. In this work, an optimal fault-tolerant control method is presented for controlling the healthy phase currents of a general n phase machine. Simulation results of a five phase PM machine are presented for verification of the proposed strategy.

show abstract

“…There exists, in frequency domain, many health monitoring and failure diagnosis methods for PWM drive systems. Except permanent fault with significant amplitude change which can be identified by some classical diagnosis methods (Richardeau et al, 2002), frequency domain methods based on time-frequency transform and wavelet packet transform were developed to handle incipient degradation in PWM non stationary process (Yen and Lin, 2000;Zanardelli and Strangas, 2005). To enhance effectiveness of those approaches, some predictive maintenance research specialists associated statistical classification and learning methods, but questions remain pertaining to their real-time implementation capability (Qiu et al, 2006;Awadallah and Morcos, 2006).…”

Section: Introductionmentioning

confidence: 99%

Real‐time degradation monitoring and failure prediction of pulse energy conversion systems

Kolokolov¹,

Monovskaya

²

,

Adjallah

³

2007

Journal of Quality in Maintenance Engineering

1

0

View full text Add to dashboard Cite

Purpose-The paper presents a new approach for safe operation, and maintenance cost reduction, regarding electrical and electromechanical systems of power production, power conversion and power transmission, primarily in industrial units. Design/methodology/approach-The paper adapts a theoretical approach to real-time monitoring of pulse energy conversion systems (PECSs), and prediction of abnormal dynamics incipient and developing failure. The approach utilizes the preliminary bifurcation analysis results and the geometrical interpretation of the fractal regularities in PECS dynamics, to reveal degradation development. Findings-It turns out that this new approach enables to fill the joint requirements of real-time failure prediction of the high frequency power control devices, and of the relating failure symptoms to cause parameters. Discussions are led on the fundamental outcomes of numerical and experimental investigations of a DC-DC buck voltage converter with pulse-width-modulation (PWM) control. Originality/value-About «failure prediction», we propose to pay attention, not to identification of the dynamics evolution specific reason, but real-time monitoring of this reason consequenceincipient abnormal dynamics in the electrical and electromechanical systems-, that can lead to failure. The advantage of this approach consists in the possibility of taking into account PECS operating conditions of models ambiguity of both disturbing parameter changes and PECS behavior. Practical implication-The real-time monitoring of incipient abnormal dynamics in key nonlinear devices of electrical and electromechanical systems constitutes a mean to predict and prevent failures. It provides invaluable information for deciding and planning predictive maintenance actions, from the insurance of optimal operating conditions until abnormal operating prevention, either by means of modification of controlled parameters and control laws, or in the worst case, by change of the power components' structure.

show abstract

Methods to Identify Intermittent Electrical and Mechanical Faults in Permanent Magnet AC Drives Based on Wavelet Analysis

Cited by 7 publications

References 18 publications

Disturbance Free Operation of Permanent Magnet Motor Drives Under Short Circuit Faults Using Center-Split Winding

Disturbance Free Operation of Permanent Magnet Motor Drives Under Short Circuit Faults Using Center-Split Winding

Disturbance Free Operation of Permanent Magnet Motor Drives Under Short Circuit Faults Using Center-Split Winding

Real‐time degradation monitoring and failure prediction of pulse energy conversion systems

Contact Info

Product

Resources

About