Frequently Asked Questions

How Motors Work

History of Motors

Types of Motors

Frequently asked Questions


This website was developed by Geno Jezek, owner of the online magnet store, Custom-Magnets has been supplying magnetic material and custom fridge magnets since 1999.
We are the #1 trusted magnet site!

Some of our most popular products:
Personalized Magnets
Magnetic Material
Magnetic Tape
Magnetic Sheeting w/ White Vinyl
Magnetic Sheeting w/ Adhesive
Magnetic Signs
Ink Jet Magnets
Neodymium Magnets



Frequently asked Questions

Q: Who is Nikola Telsa?
A:   Nikola Telsa was a world-acclaimed physicist, mechanical engineer and an avid scientist from Serbia. His theoretical work bases the fundamental of modern alternating current electric power (AC) systems, including the polyphase power distribution system and AC motor.

Q: What are the main parts of the simple motor?
A:   Any simple electric motor consists of 6 main components,

  • DC power supply
  • Armature or rotor
  • Commutator
  • Brushes
  • Axle
  • A field magnet

Q: What is a single-phase AC synchronous motor?
A: The single-phase AC synchronous motor rotors work without require any induced current. This ensures that the rotors do not slip backward against the mains frequency and rotate in synchrony with the mains frequency. Because of generation of highly accurate and measurable speed, these motors are used in tape drives, power mechanical clocks, strip-chart recorders, audio turntables etc.

Q: What are the advantages of a DC motor
A: In DC motors, controlling speeds is much easier, as higher the armature voltage, quicker will be the rotation. DC motors have a simple design and are easy to control torque owing to the proportionality of the output torque to current. Limited current will result in limited torque, which makes it easy to control speed. DC motors are usually used in textiles manufacturing.

Q: What are the advantages of a universal motor?
A: One of the major advantage is that AC supplies can be used on motors with typical DC motors features, particularly with high starting torque and very compact design, incase high speeds are being used.

Q: What are the main historical events in development of motor?

  • 1821: Micheal Faraday demonstrated a motor powered by electricity
  • 1837: First Patent by America for electric motor
  • 1888: Nikola Tesla patented the induction motor
  • Recent: 1990s: Hybrid vehicles tested for running with an internal combustion engine and an electric motor charged by the previous engine to retain pick power usage.

Q: What is an EMD motor?
A: EMD are low voltage Permanent Magnet DC motors that are used for small electric vehicles. EMD work as a group/family rather than as individual motors.

Q: Who is Joseph Henry?
A: : An American scientist named Joseph Henry built an improved version based upon Michael Faraday’s rudimentary electric motor. He constructed a device whose rotating part was a electromagnet moving up and down on a horizontal axis. Pairs of wires projecting from its ends made alternate connections with the two electrochemical cells. This resulted in reversed polarity. This was the first systematic motor that resulted in 75 cycles per minute.


© 2006-2015 Geno Jezek - All Rights Reserved. This site is copyrighted and cannot be reproduced in any form without written consent.

Website powered by