Corrections to “Principle of Optimal Voltage Regulation and Energy-Saving for Induction Motor With Unknown Constant-Torque Working Condition”

Zhong, B.; Ma, Lili; Hao, Dong

doi:10.1109/access.2021.3094637

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…Based on the analysis of the rotor loss, a method to reduce rotor loss without changing the stator structure and winding current was proposed. In order to achieve the optimal voltage regulation and energy saving of an AC induction motor under constant torque and variable load conditions, Bin Zhong et al [7] derived the formula of the total electrical loss and optimal voltage regulation of the motor. Dajun Tao et al [8] took a bipolar 120 k W highspeed permanent magnet synchronous motor as their research object, established a joint calculation model of a two-dimensional transient electromagnetic field and variable load circuit, and analyzed the changes of the iron core loss in different parts of the motor under multi-load conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on No-Load Loss Characteristics of an Alternating Current Excitation Motor

Xu,

Ruan,

Wang

et al. 2023

Electronics

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An AC excitation power supply will produce a series of harmonic currents in motors compared to the conventional power supply, increase the time harmonic component, and then generate a harmonic magnetic field; harmonics will cause motor vibrations and noise in the motor and will produce a corresponding additional loss, increasing the motor temperature rise; these key technical problems need to be solved in domestic pumped storage AC excitation motor engineering applications. Herein, the no-load loss characteristic test of a 3 MW alternating current excited motor was mainly carried out using a test prototype of the 3 MW alternating current excitation motor. Further, with the aid of the finite element method, the numerical study of the no-load loss characteristics of a 3 MW alternating current excited motor was performed. The relationship between the key factors such as the no-load characteristics, no-load loss characteristics, and constant loss and voltage per unit value is analyzed, and the variation law of the no-load core loss of motors under different loads is explored. The results demonstrate that, under no-load conditions, when the applied voltage was less than the rated voltage, the voltage was proportional to the current. When the applied voltage was more significant than the rated voltage, the current increased as the voltage increased, but the relationship between the two was no longer proportional. The constant loss of the motor maintained a linear relationship with the square of the unit value of the voltage scale. When the square of the unit value of the voltage scale was zero, the loss was equivalent to the wind friction loss under no load. The core loss increased with the increase in load, and the greater the load, the faster the increase rate of the motor iron loss. The comparison deviation between the test and simulation results was less than 10%. The simulation and experimental results verified the effectiveness of finite element modeling and the finite element calculation method.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on No-Load Loss Characteristics of an Alternating Current Excitation Motor

Xu,

Ruan,

Wang

et al. 2023

Electronics

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Energy-Saving Load Control of Induction Electric Motors for Drives of Working Machines to Reduce Thermal Wear

Al-Quraan

Вовк²,

Halko³

et al. 2022

Inventions

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The influence of reduced voltage on the service life of an induction motor is considered in this article. An algorithm for calculating the rate of thermal wear of induction motor insulation under reduced supply voltage depending on the load and the mechanical characteristics of the working machine has been developed. It determines the change in the rate of thermal wear under alternating external effects on the motor (supply voltage and load) and allows forecasting its service life under these conditions. The dependency graphs of the rate of insulation thermal wear on the motor load for various levels of supply voltage and various mechanical characteristics of working machines are provided in the work. It was determined that the rate of thermal wear of the induction motor insulation increases significantly when the voltage is reduced compared to its nominal value with nominal load on the motor. The authors propose to consider this fact for resource-saving control of the motor. The paper presents the results of experimental verification of the obtained rule for “Asynchronous Interelectro” (AI) series electric motors that confirm its accuracy. Based on the obtained correlation, the rule of voltage regulation in energy-saving operation mode has been derived. The proposed rule takes into account the thermal impact on the electric motor running in energy-saving mode and enables saving its resource, which, in turn, results in extending its service life. The research does not consider additional effects on the electric motor except the thermal one.

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Corrections to “Principle of Optimal Voltage Regulation and Energy-Saving for Induction Motor With Unknown Constant-Torque Working Condition”

Cited by 2 publications

References 2 publications

Experimental Study on No-Load Loss Characteristics of an Alternating Current Excitation Motor

Experimental Study on No-Load Loss Characteristics of an Alternating Current Excitation Motor

Energy-Saving Load Control of Induction Electric Motors for Drives of Working Machines to Reduce Thermal Wear

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