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Online sensorless induction motor temperature monitoring
(Institute of Electrical and Electronics Engineers, 2010-06)
A sensorless internal temperature monitoring method for induction motors is proposed in this paper. This method can be embedded in standard motor drives, and is based on the stator windings resistance variation with ...
Acionamento e proteção de motor de indução trifásico via microcontrolador com leitura de tensão por meio de dispositivo optoacoplador
(Universidade Tecnológica Federal do ParanáCornelio ProcopioBrasilEngenharia ElétricaUTFPR, 2016-06-08)
The three-phase induction motors are widely used in the industry, this fact makes possible to claim that improvements in the protection system, and the increasing of the drive system reliability of these engines are highly ...
Detecting broken rotor bars with zero-setting protection
(Institute of Electrical and Electronics Engineers, 2014-03)
Broken rotor bars in induction motors can be dependably detected by analyzing the current signatures under sufficient motor load conditions. Detection becomes less dependable under light motor load conditions. There are ...
Proteção de motores elétricos de grande porte
(Universidade Estadual Paulista (Unesp), 2013-12-02)
Large electric motors require greater care when driving, especially during continuous operation since they are part of day-to-day manufacturing sector, acting essentially to ensure that no damage occurs to the production ...
Derating of induction motors due to power quality issues considering the motor efficiency class
(Institute of Electrical and Electronics Engineers, 2020-03)
Heating and losses of induction motor (IM) grow with the supply voltage unbalance and harmonic distortion. To avoid thermal overload, the IEEE 141-1993, the IEEE 3004.8, NEMA MG1-2014, and the IEC 60034-26 standards establish ...
Proteção de motores elétricos de grande porte
(Universidade Estadual Paulista (UNESP), 2015)
Proteção de motores elétricos de grande porte
(Universidade Estadual Paulista (Unesp), 2015)
Proposta de um método para bloqueio do esquema regional de alívio de carga frente a inércia rotativa de desligamento dos motores de indução
(Universidade Federal de Santa MariaBrasilEngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia ElétricaCentro de Tecnologia, 2021-02-26)
The Under Frequency Load Shedding (UFLS) is an important systemic protection method used to prevent the electrical system from collapsing when the available generation is less than the load demanded. Traditionally, UFLS ...
Voltage unbalance and harmonic distortion effects on induction motor power, torque and vibrations
(Elsevier Science Sa, 2016-11)
Voltage unbalance and harmonic voltage distortion affect the power, torque and vibrations on induction motors (IM). In this paper, we compute the frequency of the oscillations of the power, torque and vibrations due to ...