Every time electric current flows through a conductor, it generates a magnetic field which causes deflection when placed next to an electrical wire. A compass placed near such wire will deflect when exposed to this magnetic field. Magnetic fields can be visualized as an array of lines extending from each point in space with strength proportional to their direction of field at each spot.

Parts of an Electric Motor

An electric motor converts electrical energy to mechanical energy through producing a rotating force, using electromagnetism (the magnetic force created when running electricity through wires). Like poles attract and opposite poles repel.

Each electric current loop experiences a magnetic B-field around it that exerts a force proportional to its cross product between m and H; this force can be expressed as "mB cos th". A solenoid with current running through it acts like a magnet, and its B-field can be measured using a magnetic field meter. You can use this tool to simulate magnetic fields created by different configurations of solenoids by changing the number of loops within them and watching how their B-field strength changes accordingly.

What is a Magnetic Field?

Electric current flowing through wires creates magnetic fields. Their strength and direction can be determined using Maxwell's Equations (see below).

Magnetic field intensity, B, is measured in units known as Webers. One Weber equals one square meter's worth of magnetic fields generated by one magnet.

Refrigerator magnets feature very small magnets whose magnetic fields can be described using a simple mnemonic known as the right-hand grip rule. According to this mnemonic, magnetic fields can be determined by gripping your right thumb around the wire with fingers pointed in the direction of current flow; magnetic field lines emerge from its north pole and fan out before returning back towards its south pole.

How to Buy an Electrical Motor

Electric motors convert electrical current to mechanical power using electromagnetism principles. A magnetic field exerts deflecting force against an ongoing current-carrying loop of wire that keeps an electric motor turning continuously. To better grasp this principle, construct a simple electromagnet. First, remove insulation from one end of the copper coil wire attached to a paper clip so that its bare side is visible; then position this paper clip against a disk magnet.

As soon as electricity begins flowing through a paper clip, its magnetism collides with that produced by its copper coil, leading it to alternate between being attracted to and repelled by both magnetic fields. As this occurs, you will observe that its loop of wire oscillates between being attracted by one field and another until eventually giving way altogether.

Electric Motors for Sale

Electric motors use electromagnetic forces to convert electrical energy into mechanical power by interrelating magnetic fields with current in a coil, producing torque which causes its shaft to spin. They may be powered using either direct current from batteries or by AC current from power grids and electrical generators.

AC motors are an increasingly popular choice in office machines, fans, heater blowers and refrigeration equipment. Like their DC counterparts, AC motors utilize coils energized with alternating current to generate an outer stator with magnetic coils which create a rotating magnetic field, and an inner rotor equipped with conductors which carry current directly into its inner rotor to spin its shaft and generate torque.

To turn the rotor, one electromagnet at a time must be powered on, while brushes and commutators reverse current flow each time the shaft makes half turns.

Used Electric Motors

Most electric motors use magnetic fields and current to interact with one another and exert force that causes rotor rotation, producing mechanical energy which can then be transformed into useful work such as spinning fans or power tools.

An effective way to demonstrate how an electric motor operates is to place two bar magnets close together with a short length of conducting loop, then when electricity flows through it one magnet will attract towards its north pole and one towards its south.

An induction motor is the most prevalent industrial electric motor. It consists of two primary parts - a stator and a rotor. The latter is powered by an AC magnetic field generated from its stator via coils which generate spin.

Surplus Motors

Electric motors convert electrical energy to mechanical energy through opposing magnetic fields. Their rotor consists of coil wire windings wound around a soft iron ferromagnetic core that, when charged with current, form magnetic poles and produce rotational torque. buy electric motor from surplusrecord industrial electrical motors are the best buy of electric motor used electric motor for sale at surplusrecord. surplus motors are the best Motors An H-field from one magnet pushes and pulls on opposite poles of another magnet with equal strength and magnitude, creating a vector cross product between their H-fields that can be calculated using the right-hand rule.

Ideal magnetic permeability materials have dipoles with identical magnetic fields (B-field), making up the basis of an electric motor.

Industrial Electric Motors

Industrial electric motors employ magnetic fields to create mechanical power. Most industrial motors use three-phase AC induction technology. When current flows through stator windings it creates a rotating magnetic field which then induces current in the rotor for torque generation.

The rotor is composed of wire coils wrapped around a laminated soft iron core with weak magnetic attraction, so when current flows through these windings they experience magnetic force from their core, which acts to turn the shaft and provide mechanical power. Salient-pole motors use projections called poles on both rotor and stator ferromagnetic cores to face each other, wrapped with wire wrapped under their pole face that turns north or south when current passes through them. A non-salient-pole motor has a cylindrical-shaped core with evenly spaced slots on its pole face for wiring placement.