One common method is to use a miniature synchronous motor which turns at a constant speed related to the power frequency; a gear-train is used to propel the paper.
32.
Switched-mode power supply units ( PSUs ) in domestic products such as personal computers often have universal inputs, meaning that they can accept power from power frequencies and voltages.
33.
The size of the flux arrangement, and thus the size of the iron plates required, was a function of vehicle speed, power frequency and the size of the magnets.
34.
Power frequency flicker can also sometimes be emitted from the very ends of the tubes, if each tube electrode produces a slightly different light output pattern on each half-cycle.
35.
Many good power frequency, either 50 or 60 Hz, serves as the reference, although commercial power frequency sometimes changes slightly ( a few tenths of a percent ) with varying load.
36.
With that plant off line, officials said, power frequency dropped below 60 cycles per second, shutting down power systems on Puget Sound and elsewhere to protect power plants, motors and appliances.
37.
Many good power frequency, either 50 or 60 Hz, serves as the reference, although commercial power frequency sometimes changes slightly ( a few tenths of a percent ) with varying load.
38.
The magnetic fields were so strong that they caused the plates to vibrate at 50 Hz ( he standard European power frequency ) which caused a loud humming sound that riders found distracting.
39.
To be completed by winter 2018, the 49 megawatt ( MW ) lithium-ion system will respond to fluctuations in electrical demand in less than a second, to maintain electric power frequency and stability.
40.
Large motors operating on commercial power frequency include a " squirrel cage " induction winding which provides sufficient torque for acceleration and which also serves to damp oscillations in motor speed in operation.
