In textile mill, electricity consumption is in increasing trend, due to modernised machines and continuous usage of the equipments in inefficient operating parameters. The energy cost is around 15 % to 20 % over the production cost and it stands next to raw material cost. Hence now a day's area of focus is towards energy consumption at load end and by optimizing the efficiency of the motor. In this paper, influence of motors and process of optimisation in textile mill on energy conservation is discussed with practical data.
In modern industry, majority of the mechanical elements are driven by either induction motors or special motors like servo motors, synchronous motors, BLDC motors. In order to drive the motors and to vary the speed of the motors, electronics drives are required. Since the drives are powered with three phase AC, if the power grid has power quality issue, which directly reflects on to the power electronics drives. As per Indian grid standards, power quality is defined as harmonics, surge, sag, swell, which was formulated in the year of 2003 and further revision was done in 2010. But in the recent day’s majority of the industries are constructed in same place (special economic zone), unpredicted industrial loads are increased and inserted in to existing running load, so eventually the power quality definition also changes and even sometimes connections are made as temporary for certain loads. Although these motors typically tolerate variations in utilization voltage, power quality professionals continue to spend a great deal of time answering questions about proper utilization voltage for a given motor. The voltage quality factors that create the most serious problems and confusion in the field include nominal utilization voltage that does not match the motor nameplate, proper voltage sag ride-through protection for the motor control circuitry, and phase-to-phase voltage imbalance. In review article, modern industry premises failure of components list and condition of power quality will be surveyed in various segments. Various failure of inverter drives namely, switching failure, commutation failure, common mode voltage problem, bearing current issues, harmonics etc., are discussed in details from various research article and presented in this review.
In recent days testing of a product with the EMI standard using test set up is a mandatory as most of the product has the electronic circuitries which possess the high-speed signals. This paper discusses about the conducted emission and the implementation of filters for mitigating the conducted electromagnetic emissions. A DC-DC Buck converter which can be used in vehicle electronics was simulated using the software tool with and without filter and the results were analyzed for mitigating the conducted electromagnetic emission.
The increasing amounts of three-phase squirrel-cage induction motors over the years are fed by variable-speed drives. In such a machine high frequency generation is caused by the high carrier frequencies of the pulse-width modulation, the associated short rise times of the IGBT output, and the reflected waves from the motor terminals. EMI is also produced by the harmonics which are generated by the carrier frequencies. This EMI/RFI is also referred to as electrical noise. This paper is focused on the influence of the electrical noise emitted by variable-speed drives on field components in Textile machines and CNC Lathe machines. Components failed during a year have been collected and possible solutions have been proposed.
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