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This paper proposes a new energy loss observer for batteries that has a good accuracy and low complexity. This observer can provide a support for battery management systems (BMS) in terms of predicting battery energy loss and/or battery internal temperature for given load profiles, and this enhances BMS capabilities for predictive and corrective actions. The typical observer requires an accurate battery...
The PWM current derivative technique for sensorless control of AC machines requires current derivative measurements under certain PWM vectors. This is often not possible under narrow PWM vectors due to high frequency (HF) oscillations which affect the current and current derivative responses. In previous work, researchers extended the time that PWM vectors were applied to the machine for to a threshold...
This paper presents the design and operation of a portable Current Injection Unit (CIU) to be used in conjunction with the Active Impedance Estimation (AIE) technique for fault location in DC electrical distribution systems. The AIE technique injects a current transient into the system and monitors the resultant voltage transient. By combining these measurements in the frequency domain, the real and...
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