AO26255260
... (the rotor speed, ωr) is considered as the reference model. The model that has the quantity to be estimated involved is considered as the adaptive model (or adjustable model). The output of the adaptive model is compared with that of the reference model, and the difference is used to drive a suitabl ...
... (the rotor speed, ωr) is considered as the reference model. The model that has the quantity to be estimated involved is considered as the adaptive model (or adjustable model). The output of the adaptive model is compared with that of the reference model, and the difference is used to drive a suitabl ...
PNIMNiPE_nr63 - Instytut Maszyn, Napędów i Pomiarów
... is very difficult with complicated structures and shapes of modeled devices. Therefore three–dimensional analysis is used usually to model only a piece of symmetrical machines. In no symmetrical machines more practical are 2D models [1]. Examples of such no symmetrical machines are two speed synchro ...
... is very difficult with complicated structures and shapes of modeled devices. Therefore three–dimensional analysis is used usually to model only a piece of symmetrical machines. In no symmetrical machines more practical are 2D models [1]. Examples of such no symmetrical machines are two speed synchro ...
21-5M How are Electricity
... 5. DESCRIBE: What determines the direction of electric current in a wire when a magnet is moved around the wire? ...
... 5. DESCRIBE: What determines the direction of electric current in a wire when a magnet is moved around the wire? ...
Science 9 Unit 4: Electricity Name
... Faraday constructed the first motor. By coiling (copper) wire around a (iron) metal core a strong electromagnet can be made. When attached to an electrical source it will produce a strong magnetic field. To keep this electromagnet spinning in a magnetic field, the direction that the current is trave ...
... Faraday constructed the first motor. By coiling (copper) wire around a (iron) metal core a strong electromagnet can be made. When attached to an electrical source it will produce a strong magnetic field. To keep this electromagnet spinning in a magnetic field, the direction that the current is trave ...
OLPD Testing of 10 kV Motors and Generators Following
... A gas processing facility based in the North Africa requested on-line partial discharge (OLPD) testing of the two (2) 10 kV Gas Turbine Generators and four (4) process critical 10 kV Motors that had reached 4 years of service. The testing was requested as a result of a recent HV stator insulation fa ...
... A gas processing facility based in the North Africa requested on-line partial discharge (OLPD) testing of the two (2) 10 kV Gas Turbine Generators and four (4) process critical 10 kV Motors that had reached 4 years of service. The testing was requested as a result of a recent HV stator insulation fa ...
V/F control
... Induction motors with squirrel cage rotors are the workhorse of industry because of their low cost and rugged construction. When Squirrel cage induction machine is operated directly from the line voltages(60 Hz/50 Hz essentially constant voltage) an Induction motor is operated at constant speed. How ...
... Induction motors with squirrel cage rotors are the workhorse of industry because of their low cost and rugged construction. When Squirrel cage induction machine is operated directly from the line voltages(60 Hz/50 Hz essentially constant voltage) an Induction motor is operated at constant speed. How ...
OPTIMAL EFFICIENCY BASED PREDICTIVE CONTROL OF
... used with a field oriented control scheme, the induction machine is the most widely used electrical machines. The usually used direct field oriented control methods keeps rotor flux at constant rated value and ignores the machine losses. Consequently, the efficiency of the motor is poor especially w ...
... used with a field oriented control scheme, the induction machine is the most widely used electrical machines. The usually used direct field oriented control methods keeps rotor flux at constant rated value and ignores the machine losses. Consequently, the efficiency of the motor is poor especially w ...
2. measurement of the windings resistance for universal motors
... Motors that can be used with a single-phase AC source as well as a DC source of supply voltages are called universal motors. Universal motors differ in design from the induction motors. They have a series wound rotor circuitry similar to that of DC motors. The rotor of a universal series motor is ma ...
... Motors that can be used with a single-phase AC source as well as a DC source of supply voltages are called universal motors. Universal motors differ in design from the induction motors. They have a series wound rotor circuitry similar to that of DC motors. The rotor of a universal series motor is ma ...
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.