It had a card reader and a card-punch, air compressor and a typewriter. So you had to be an extremely gifted person to be able to maintain this machine, because you had to be a mechanic, an engineer, a logician, an early programmer. The most important invention of the 20th century?
The three phases of anasynchronous motorare the stator, the rotor and the field. The stator is the stationary part of the motor in which the windings are housed. The rotor is the rotating part of the motor that contains the magnets. The field is the magnetic field generated by the stator...
NOTE:The voltage sensing starting relay is position sensitive. The “pick-up” and “drop out” voltages must match the requirements of the compressor manufacturer. Using any old starting relay could easily damage the compressor motor windings. Some aftermarket starting relays are current sensing. On...
Single phase induction motors achieve their rotation courtesy of the constantly reversingmagnetic fieldcreated in the motor'sstatorwindings by the alternating current (AC)power supply. Apermanent magnetrotorlocated inside the stator is forced to “follow” the north/south orientation of the alternating ...
Most electric motors are cooled with fans connected to the motor drive shaft. One disadvantage of variable-frequency drive systems is the loss of fan cooling when running at lower speeds. This type of system can also cause additional heating of motor windings. Installation of motor temperature sen...
and has been widely used. Its main disadvantage is the difficulty of speed regulation. The rotor of the wound three-phase asynchronous motor is also provided with three-phase windings like the stator and is connected with an external varistor through slip rings and brushes. Adjusting the varistor...
Refrigerators run compressor 120v and have step down transformer for smaller more sensitive electronic. So I think THD is important but not a major deal for typical consumer. Not all electronics are same but I have not seen a computer’s motherboard run in 120v. Or a ac thermostat run ...