Analysis of Starting Process for Medium-Sized Induction Motors With High-Voltage

2012 ◽  
pp. 51-57
Author(s):  
Yunyan Xia ◽  
Dawei Meng ◽  
Yongming Xu ◽  
Yufeng Lu
Keyword(s):  
High Voltage ◽  
Induction Motors ◽  
Starting Process

Magnetic Noise in Induction Motors

2008 ◽  
Author(s):  
Radu S. Curiac ◽  
Sumit Singhal
Keyword(s):  
Induction Motor ◽  
High Voltage ◽  
Induction Motors ◽  
Mechanical Design ◽  
Magnetic Noise ◽  
Noise Generation ◽  
Design Phase ◽  
Coil Design ◽  
Noise Data ◽  
And Control

Noise in large high voltage induction motors (500Hp–18000Hp) may be airborne or magnetic in nature. Usually, large high voltage induction motors are custom built and tailored to meet customer’s demand. Since every motor is unique in its design, it is imperative to predict accurately the magnetic noise generation during design phase, this way avoiding expensive rework cost and not loosing the customer confidence. Stator – rotor mechanical design, along with careful electrical coil design, can significantly cut down magnetic noise in an induction motor. This paper discusses the various causes and control of magnetic noise in large induction motors. Theoretical noise predictions in large induction motors, along with measured experimental noise data, are presented.

Analytical determination of the parameters of high-voltage induction motors with squirrel-cage rotors after repair

2011 ◽  
Vol 82 (11) ◽  
pp. 575-577
Author(s):  
V. P. Kazantsev ◽  
A. M. Kostygov ◽  
M. I. Kuznetsov ◽  
A. Yu. Moskokov
Keyword(s):  
High Voltage ◽  
Induction Motors ◽  
Analytical Determination ◽  
Squirrel Cage

Nonintrusive efficiency estimation for large power and high voltage induction motors

2017 ◽  
Author(s):  
Haisen Zhao ◽  
Pengyu Li ◽  
Geng Chen ◽  
Yilong Wang ◽  
Yang Zhan ◽  
...  
Keyword(s):  
High Voltage ◽  
Induction Motors ◽  
Large Power ◽  
Efficiency Estimation

Assessment of remaining insulation life of high voltage induction motors

2003 ◽  
Author(s):  
K. Kimura ◽  
T. Iwabuchi ◽  
K. Morooka ◽  
Y. Ishikawa
Keyword(s):  
High Voltage ◽  
Induction Motors

Calculation for the Heating and Safe Operation Time of YKK Series High-voltage Motors in Starting Process

2013 ◽  
Vol 7 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Yunyan Xia ◽  
Dawei Meng ◽  
Yongming Xu
Keyword(s):  
High Voltage ◽  
Dynamic Characteristics ◽  
Operation Time ◽  
Static Characteristic ◽  
Heating And Cooling ◽  
Motor Cooling ◽  
Starting Process ◽  
Starting Characteristics ◽  
Characteristic Dynamic ◽  
Important Significance

In order to analyze the heating and cooling conditions of high voltage motors of YKK series in starting process, the starting characteristics and ventilation systems are calculated. The starting characteristics calculation method is improved and compared with the static characteristic, dynamic characteristics come to more consistent with the actual situation. The calculation result of heating is more accurate according to the calculation of dynamic characteristics. A windresistance network model is built combined with the motor cooling structure to calculate the distribution of air flow in the motor. The locked-rotor safety running time in starting process is calculated based on the accurate calculation of heating and cooling condition. The result is more close to the experiment and it has an important significance to the design and improvement of YKK series high voltage motor.

A Case Study on Windage Noise Diagnosis and Reduction in 10,000 HP High Speed Induction Motor

2009 ◽  
Author(s):  
Sumit Singhal ◽  
Alexander Nijhuis ◽  
Christian Bauer
Keyword(s):  
Induction Motor ◽  
High Voltage ◽  
High Speed ◽  
Induction Motors ◽  
Power Level ◽  
Sound Intensity ◽  
Magnetic Noise ◽  
Frame Design ◽  
Factory Testing

Noise in large high voltage induction motors (500Hp and above) may be windage or magnetic in nature. Usually large high voltage induction motors induction motors are custom built and tailored to meet customers demand. In large high speed induction motors sometimes it is difficult to isolate windage noise from magnetic noise as the generated frequencies are similar in magnitude; hence reducing noise after motor is manufactured becomes extremely challenging. This paper will present the noise troubleshooting case study of 10,000Hp induction motor that shows overall noise of 100 dB during the factory testing. A variety of tests (e.g unloaded, variable speed, coupled loaded test and also test motor driven as load) were performed to isolate magnetic noise from air borne noise. Noise FFT data was collected to identify peak noise generating frequencies. Sound intensity and sound pressure data were also collected to calculate overall sound power level. After identifying the cause of noise, motor frame design was modified which results in overall noise level of 85 dB.

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