A remote and sensorless stator winding thermal protection scheme for line-connected AC machines

2003 ◽  
Author(s):  
Sang Bin Lee ◽  
T.G. Habetler
Keyword(s):  
Thermal Protection ◽  
Stator Winding ◽  
Ac Machines ◽  
Protection Scheme

A New Global Transposition Method of Stator Winding and Its Loss Calculation in AC Machines

2020 ◽  
Vol 35 (1) ◽  
pp. 149-156
Author(s):  
Dongmei Wang ◽  
Yanping Liang ◽  
Lianlian Gao ◽  
Xu Bian ◽  
Chenguang Wang
Keyword(s):  
Stator Winding ◽  
Ac Machines ◽  
Loss Calculation

Wavelet-based ground fault protection scheme for generator stator winding

2002 ◽  
Vol 62 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Tai Nengling ◽  
Hou Zhijian ◽  
Yin Xianggen ◽  
Li Xiaohua ◽  
Chen Deshu
Keyword(s):  
Stator Winding ◽  
Protection Scheme ◽  
Ground Fault ◽  
Fault Protection ◽  
Ground Fault Protection ◽  
Generator Stator

High-Frequency Carrier-Signal Voltage Selection for Stator Winding Fault Diagnosis in Inverter-Fed AC Machines

2008 ◽  
Vol 55 (12) ◽  
pp. 4181-4190 ◽  
Author(s):  
Fernando Briz ◽  
Michael W. Degner ◽  
Pablo Garcia ◽  
Alberto B. Diez
Keyword(s):  
Fault Diagnosis ◽  
High Frequency ◽  
Stator Winding ◽  
Ac Machines ◽  
Selection For

Semi-Open Thermal Protection Scheme of Electronics in Nuclear Rescue Robot

2016 ◽  
Vol 853 ◽  
pp. 405-409
Author(s):  
Ke Sun ◽  
Yan Long Han ◽  
Wei Ling Luan
Keyword(s):  
Ambient Temperature ◽  
Thermal Protection ◽  
Working Hours ◽  
Thermal Control ◽  
Air Cooling ◽  
Rescue Robot ◽  
Protection Scheme ◽  
Control Scheme ◽  
Thermal Management Of Electronics ◽  
Forced Air

Thermal management of electronics is quite important for safe operation of nuclear rescue robot. However, the ambient temperature of the nuclear robot in the site of nuclear accident will suffer an alternation between ordinary and elevated temperature. Traditional phase change material (PCM) based closed scheme for thermal protection is not suitable due to the capacity limitation of PCM. Open scheme with forced air cooling or water cooling is not acceptable either, because it cannot operate in high temperature. Therefore, a semi-open thermal control scheme is proposed by using silica aerogel for heat insulation, PCM for heat absorption, and Nickel-titanium alloy spring as temperature switch. An investigation on different ambient temperature, laying angle, melting point of PCM and heat power is conducted. The results showed that, compared with the PCM-based closed scheme, our design can provide 19.23% prolonged safe working hours, which can improve the reliability of electronic devices.

A Remote and Sensorless Stator Winding Temperature Estimation Method for Thermal Protection for Induction Motor

2014 ◽  
Vol 3 (3) ◽  
pp. 53-72 ◽  
Author(s):  
T. A. Enany ◽  
W. I. Wahba ◽  
M. A. Moustafa Hassan
Keyword(s):  
Thermal Behavior ◽  
Induction Motor ◽  
Induction Motors ◽  
Thermal Protection ◽  
Electrical Machine ◽  
Stator Winding ◽  
Temperature Estimation ◽  
Matlab Simulink ◽  
Soft Starter ◽  
Drive Signals

Three-phase induction motors are the “workhorses” of industry; they are the most widely used electrical machine; because of its simple structure and high reliability. This paper proposes a new technique to model the stator winding of the induction motor in Matlab Simulink® software. This simulation of the induction motor would have the thermal behavior of its stator winding; to study the induction motor temperature estimation using motor parameter-based method. The modified model is used to validate a remote and Sensorless stator winding temperature estimation technique; therefore a thermal protection is obtained for soft-starter-connected to induction motors. The soft-starter is used to inject a DC signal in the induction motor terminal voltage and current. The stator winding resistance/temperature is estimated from DC signal injection by changing the gate drive signals of the Thyristor in the soft starter. The level of the injected DC signal is adjusted by the value of the delay angle. The accuracy of stator winding temperature estimation increased with the increase of DC signal level; however the pulsation of the output torque increased also. The thermal behavior is simulated utilizing a thermal resistor block from the Matlab Simscape™ software. It is used to replace the fixed resistor value of the induction motor model in the Matlab Simulink. The thermal monitoring scheme has been validated from the simulation results of a 7.5 kW induction motor under various loading conditions.

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