Economic Efficiency Measure of Induction Motors for Industrial Applications

Abstract

<p>This paper, introduced an expression of Economic Efficiency Measure (EEM) to permit quick evaluation for replacement of faulty induction motor with alternative (new or refurbished motor) for lowest life-cycle cost based on efficiency and rated-load conditions. This approach, simplifies the process for evaluating the energy efficiency to mere proportionate factor called as EEM. During the operating phase, the motor losses correspond to extra energy consumption, based on various parameters like motor operating conditions, operating hours, operating costs, fault factor, depreciation factor and fixed costs. The approach is effective in addressing the global issue on replacement of the faulty motor that needs a comprehensive analysis and mathematical expression. Compared to other alternatives the EEM provides a simple but effective and reliable means to asses, the feasibility of replacing or refurbishing the faulty motor. A detail analysis here would establish how much the present approach is effective in determining the replacement for a faulty induction motor either by a new one or refurbished one of corresponding rating.<strong></strong></p>

The Industrial IoT Control Design of Three Phase Induction Motor using Conventional V/F Method

“…The synchronous speed equation of an electrical AC machine is shown in Equation ( 1) [19]. The percentage of the difference between synchronous speed and rotor speed is slip, shown in Equation (2). The electromagnetic torque in IM is inversely proportional to the speed.…”

“…The IM control research using conventional and vector control methods has been overgrown. This IM is better than other electric motors (direct-current motor, permanent magnet synchronous motor, and switch reluctant motor) regarding control method, reliability, technology readiness level, and price [1] - [2]. Recently, the IM has been widely applied in transportation as the main propulsion engine [3].…”

Replacing Induction Motors without Defined Efficiency Class by IE Class: Example of Energy, Economic, and Environmental Evaluation in 1.5 kW—IE3 Motors

“…A sensitivity study of the most influential variables was conducted to obtain information before the replacement decision [30,31]. In all the cases, the variables to lyze the sensitivity are the running hours, considered in the range between 1000 and h/year, as well as the energy difference for different values between 2 and 12 percen In all cases, the reference operating point was set to annual operating hours at h/year and a 0.08 pu difference in performance between motors (reference value = 1)…”

Power Supply for Excitation Mechanism of Motor in Electrical Appliance

“…The ferrite plate is utilized to enhance the attractive field and enhance the excitation proficiency. The metal plate protects the high recurrence attractive field of the excitation system and the low recurrence turning attractive field of the stator [8]. A.…”