O A
... currents higher than normal circulates through the motor some damage will occur if these currents are not interrupted on time (Mason, 1967; Stevenson, 1982; Hodgkiss, 1981). High power induction motors are the most import equipment in the industry, because they are the primemovers of mechanical load ...
... currents higher than normal circulates through the motor some damage will occur if these currents are not interrupted on time (Mason, 1967; Stevenson, 1982; Hodgkiss, 1981). High power induction motors are the most import equipment in the industry, because they are the primemovers of mechanical load ...
how maglev trains operate
... (N) and South Pole (S). Principle of magnetism simply states that like poles repel and opposite poles attract as shown in Figure 1. Maglev uses the same principle to lift the train above the guideway. However, the magnetic field in this case is not entirely coming from permanent magnets, but it is c ...
... (N) and South Pole (S). Principle of magnetism simply states that like poles repel and opposite poles attract as shown in Figure 1. Maglev uses the same principle to lift the train above the guideway. However, the magnetic field in this case is not entirely coming from permanent magnets, but it is c ...
here - Stepper Motor Controllers
... preferable variable output from 10 to 40VDC,maximum output current 1Ampere or more. A bipolar stepper motor with rated current less than 1Ampere and rated voltage less than 20V. The nominal drive current is 415mA, with a simple modification on the value of the current sensing resistors you can adapt ...
... preferable variable output from 10 to 40VDC,maximum output current 1Ampere or more. A bipolar stepper motor with rated current less than 1Ampere and rated voltage less than 20V. The nominal drive current is 415mA, with a simple modification on the value of the current sensing resistors you can adapt ...
... The rotor windings of a conventional fixed- speed wound rotor induction machine are normally shorted by the slip rings so that there is no power output from the rotor of the induction machine. The rotor power under both generator and motor modes are rotor copper loss. For a DFIG, however, the rotor ...
Calculation of Distributed Magnetic Flux Density under the Stator
... Abstract This paper proposed an analytical model for the distributed magnetic field analysis of interior permanent magnet-type blush-less direct current motors under the stator-turn fault condition using the winding function theory. Stator-turn faults cause significant changes in electric and magnet ...
... Abstract This paper proposed an analytical model for the distributed magnetic field analysis of interior permanent magnet-type blush-less direct current motors under the stator-turn fault condition using the winding function theory. Stator-turn faults cause significant changes in electric and magnet ...
60ml “TL-CL
... the A.C. voltages which the rotating permanent-magnet tions. If required, the second RC networks 17, 18, 19 rotor of the motor produces in the phase windings 1, 2, 3. could be replaced by mechanical rotation-inhibiting The values of the two RC networks can be brought into means which co-operate with ...
... the A.C. voltages which the rotating permanent-magnet tions. If required, the second RC networks 17, 18, 19 rotor of the motor produces in the phase windings 1, 2, 3. could be replaced by mechanical rotation-inhibiting The values of the two RC networks can be brought into means which co-operate with ...
SR55 Soft Starters User Manual (SR55_UMW 1ed,RevA)
... B.1.7 – Motors Installed with Integral Brakes��������������������������������������������������������������������������������������� B–3 B.1.8 – Older Motors ������������������������������������������������������������������������������������������������������������������������������ B–3 B.1.9 – W ...
... B.1.7 – Motors Installed with Integral Brakes��������������������������������������������������������������������������������������� B–3 B.1.8 – Older Motors ������������������������������������������������������������������������������������������������������������������������������ B–3 B.1.9 – W ...
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.