VI Lubuska Konferencja Naukowo-Techniczna - i
... ensure energy saving and reliable work of both the cage induction motor (IM) and the AC drives as a whole [1, 2]. Unfortunately, in the scientific and technical publications the problems of the detailed transient analysis of the IM start-up are not enough worked out, that makes difficult the develop ...
... ensure energy saving and reliable work of both the cage induction motor (IM) and the AC drives as a whole [1, 2]. Unfortunately, in the scientific and technical publications the problems of the detailed transient analysis of the IM start-up are not enough worked out, that makes difficult the develop ...
QUALITROL-IRIS POWER IS THE WORLD’S LARGEST PROVIDER OF MONITORING
... each rotor slot. Any change in the ampere-turns within a coil due to shorted turns produces a change in the leakage flux. To measure the leakage flux, a flux probe sensor is permanently installed on the stator. During machine operation, the flux from each passing slot will induce a voltage in the fl ...
... each rotor slot. Any change in the ampere-turns within a coil due to shorted turns produces a change in the leakage flux. To measure the leakage flux, a flux probe sensor is permanently installed on the stator. During machine operation, the flux from each passing slot will induce a voltage in the fl ...
What Do All Those Things on an AC Motor Nameplate Mean?
... Shaft horsepower is a measure of the motor's mechanical output rating, its ability to deliver the torque required for the load at rated speed. It is usually given as "HP" on the nameplate. In general: HP = (Torque) x (speed)/5,250 where: Torque is in lb-ft Speed is in rpm Full-load speed The speed a ...
... Shaft horsepower is a measure of the motor's mechanical output rating, its ability to deliver the torque required for the load at rated speed. It is usually given as "HP" on the nameplate. In general: HP = (Torque) x (speed)/5,250 where: Torque is in lb-ft Speed is in rpm Full-load speed The speed a ...
i. introduction
... absence of dc link capacitor which also tends to reduce the cost of the equipment. There are two approaches which are used widely in controlling methods. The first one is based on transfer function analysis and has been proposed in [1]. The second one is based on space-vector modulation (SVM) techni ...
... absence of dc link capacitor which also tends to reduce the cost of the equipment. There are two approaches which are used widely in controlling methods. The first one is based on transfer function analysis and has been proposed in [1]. The second one is based on space-vector modulation (SVM) techni ...
analytical prediction of noise of magnetic origin produced by
... Magnetostrictive noise of electrical machines with number of poles 2p > 4 can be neglected due to low frequency 2f and high order r = 2p of radial forces. However, radial forces due to the magnetostriction effect can reach about 50% of radial forces produced by the air gap magnetic field. In inverte ...
... Magnetostrictive noise of electrical machines with number of poles 2p > 4 can be neglected due to low frequency 2f and high order r = 2p of radial forces. However, radial forces due to the magnetostriction effect can reach about 50% of radial forces produced by the air gap magnetic field. In inverte ...
ME 401 (Summer 2012)
... however, rely on combustion of some form of hydrocarbon. These methods are well understood and widely adopted throughout industrial and amateur communities. It is curious, however, that the principle of electromagnetic induction is used in industrial practices, but rarely in amateur applications. El ...
... however, rely on combustion of some form of hydrocarbon. These methods are well understood and widely adopted throughout industrial and amateur communities. It is curious, however, that the principle of electromagnetic induction is used in industrial practices, but rarely in amateur applications. El ...
DIAGNOSTIC NEWS What Can Go Wrong with Turbo Generator Rotor Windings
... ris has extended its line of cost-effective, continuous, automated PD data collection instruments to include all types of rotating machines. The Trac line that originated with MotorTrac™ now includes HydroTrac™, BusTrac™ and TurboTrac™ instruments for monitoring hydrogenerators, motors, and turbine ...
... ris has extended its line of cost-effective, continuous, automated PD data collection instruments to include all types of rotating machines. The Trac line that originated with MotorTrac™ now includes HydroTrac™, BusTrac™ and TurboTrac™ instruments for monitoring hydrogenerators, motors, and turbine ...
4. numerical results - Scientific Bulletin of Electrical Engineering
... 2.1 Electric motors. Star – delta starting All indirect starting methods are used to reduce the starting current. In the case of a star – delta starting the network voltage is applied directly to the star connected to a three phase winding coil.[4] When the motor reaches a rotation speed of 90 % of ...
... 2.1 Electric motors. Star – delta starting All indirect starting methods are used to reduce the starting current. In the case of a star – delta starting the network voltage is applied directly to the star connected to a three phase winding coil.[4] When the motor reaches a rotation speed of 90 % of ...
Electric Current
... users to abnormal conditions, such as very lightly loaded motors (which might mean, for example, that a pump is running dry). More sophisticated techniques use information available in the motor current frequency spectrum to help evaluate the health of the motor and the device it drives. For those o ...
... users to abnormal conditions, such as very lightly loaded motors (which might mean, for example, that a pump is running dry). More sophisticated techniques use information available in the motor current frequency spectrum to help evaluate the health of the motor and the device it drives. For those o ...
Induction motor
An induction or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore does not require mechanical commutation, separate-excitation or self-excitation for all or part of the energy transferred from stator to rotor, as in universal, DC and large synchronous motors. An induction motor's rotor can be either wound type or squirrel-cage type.Three-phase squirrel-cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFDs) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive (VFD) applications. Variable voltage and variable frequency drives are also used in variable-speed service.