Contacting the ball slightly below dead center helps generate a backspin of about 2, 000 rpm _ about the same speed as a standard asynchronous motor _ as the ball takes off.
22.
He made a number of inventions, e . g . asynchronous motors, electric pillows and ceramic heating parts; his research contributions led to his name being associated with the Scherbius principle for asynchronous motors.
23.
He made a number of inventions, e . g . asynchronous motors, electric pillows and ceramic heating parts; his research contributions led to his name being associated with the Scherbius principle for asynchronous motors.
24.
They feature a new powertrain with asynchronous motors of the same type as that of the motor TGV POS, and they are equipped with ERTMS . Train 701 was delivered in late 2006 and joined with the carriages of Duplex-R�seau unit 619 for pre-production tests.
25.
Following a visit of North Korean leader Kim Jong-il on 5 January 2002, the plant began work on a new range of electric locomotives, which ultimately led to their latest product, the SOngun Red Flag-class electric freight locomotive with asynchronous motors with a maximum speed of.
26.
Most European units were sold employing asynchronous motors, which added slip to the synchronous speed ( 1500 RPM at 50 Hz ) to achieve the required 24 frames ( 1440 RPM ) and 30 frames ( 1800 rpm ), without gearing requirements in the original construction.
27.
The 12X design maintained the basic configuration of the Class 120 : two bogies with two axles each, each axle powered by three-phase asynchronous motors, forced-air cooling of motors with cooling exhausts on the inclined roof edges, airtight machine room with closed walls and a central alley.
28.
Newer locomotives are always built with asynchronous motor control systems that have no problem with a range of input frequencies including DC . However the Deutsche Bahn train operator does still use older models from the standard electric locomotive series-even though some are now as much as 50 years old.
29.
The converter equipment and traction transformers have to accommodate different input frequencies and voltage ( ranging from as high as 50 Hz down to 16.7 Hz and rated up to 25 kV ) while being suitable for multiple AC asynchronous motor and DC converters and motors with varying harmonics mitigation filtering requirements.
30.
The induction motor ( or asynchronous motor ) always relies on a small difference in speed between the stator rotating magnetic field and the rotor shaft speed called slip to brushless wound-rotor doubly fed synchronous motor system has an independently excited rotor winding that does not rely on the principles of slip-induction of current.
