Abstract
The utilization rate of permanent magnet synchronous motors (PMSM) is increasing in the industry today. Due to this fact, the high efficiency ratio of PMSMs has reached IE5 premium class efficiency. Therefore, the efficiency coefficient of the PMSM varies from 92% to 97%. As a result, this type of motor is replacing traditional asynchronous motor by falling into efficiency classes of IE1, IE2, IE3, and IE4, which range from 75% to 92% in the industry. Thus, the object of the research was to develop a method to determine the efficiency of permanent magnet synchronous motor applications in order to identify and verify the variating parameters. In this study, an innovative and safe method of PMSM testing when the nominal parameters of the motor are unknown was presented through research. Also, the comparison of PMSM oscillograms with different types of load types and phase shift oscillograms, generated using operation amplifier, were analyzed and is scrutinized. During the design process, the PMSM was projected for the IE5 premium efficiency class. However, after production, the PMSM sometimes does not match the nameplate parameters, which are declared by the factory. As a result, during the testing procedures, the PMSM nameplate parameters did not match the projected parameters. Facing the problem of the projected and tested efficiency mismatch, the PMSM highest efficiency determination experiments were performed in a laboratory in order to prove the highest efficiency of the PMSM. The results showed different PMSM input parameters. Furthermore, the experimental results of the PMSM testing were confirmed with electrical machines theory, and simulation results were performed with electrical circuits. The theory of PMSM operating in different values of input voltage is represented in graphical abstract.
Highlights
Today, as a result of industrial progress, energy consumption is being optimized
Experiment, a 302-V electromotive force was measured, which is equal to permanent magnet synchronous motor (PMSM) nominal voltage
During the efficiency determination experiment of permanent magnet synchronous motor (PMSM), the highest efficiency of 98.7% was reached with 302-V nominal voltage
Summary
As a result of industrial progress, energy consumption is being optimized. Electrical motors are the most common electricity consumption assets in the industry, with about 66% of electricity consumed by electrical motors. The adaptation of higher efficiency motors is one of the most important issues in the industry today. The comparison of different types of motors by efficiency rating was described by the authors of Reference [1]. In more and more applications, PMSMs are appearing due to their higher efficiency class. The typical induction motors are being replaced with PMSMs. The vision of future trends has been more deeply discussed by the authors of Reference [2]. The sustainability of permanent magnets in electrical motors was reviewed by the authors of Reference [3]
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