Buyer's Guide to Selecting the Right Motor

Buyer's Guide to Selecting the Right Motor

Motors can be found practically everywhere. This guide will help you learn the basics of electric motors, available types and how to choose the correct motor. The basic questions to answer while deciding which motor is most appropriate for an application are which type should I choose and which specifications matter.
How do motors work?
Electric motors work by converting electrical energy to mechanical energy in order to create motion. Force is generated within the motor through the interaction between a magnetic field and winding alternating (AC) or direct (DC) current. As the strength of a current increases so does the strength of the magnetic field. Keep Ohm's law (V = I*R) in mind; voltage must increase in order to maintain the same current as resistance increases.

Electric Motors have an array of applications. Conventional industrial uses include blowers, machine and power tools, fans and pumps. Hobbyists generally use motors in smaller applications requiring movement such as robotics or modules with wheels.
Types of motors:
There are many types of DC motors, but the most common are brushed or brushless. There are also vibrating motors, stepper motors, and servo motors.

DC brush motors are one of the most simple and are found in many appliances, toys, and automobiles. They use contact brushes that connect with a commutator to alter current direction. They are inexpensive to produce and simple to control and have excellent torque at low speeds (measured in revolutions per minute or RPM). A few downsides are that they require constant maintenance to replace worn out brushes, have limited in speed due to brush heating, and can generate electromagnetic noise from brush arcing.

http://electrical-engineering-portal.com/5-steps-to-choose-best-motor-for-your-application

Micro and nano-motors for biomedical applications

Prótesis sobre implantes sin neAbstract

Micro- and nano-motors are a class of miniaturized man-made machines that are able to convert chemical or external energy into mechanical motion. The past decade has witnessed significant progress in the design and fabrication of micro- and nano-motors as a future intelligent and comprehensive biomedical platform. In this review we will critically assess the challenges and limitations of micro- and nano-motors, their mechanism of propulsion and applications in the biomedical field. Important insights into the future development and direction of nano-motors for improved biocompatibility and design will be discussed.
cesidad de medidas



This article is part of the themed collections: Emerging Investigators and 2014 Journal of Materials Chemistry B Hot Articles