1.Low Power DC Motors
    The lower power motors aren’t really useful for things commonly associated with motors. Lifting and transportation applications require more power & torque for them to work. However, what they lack in power they make up in precision. Low power DC motors are particularly useful as speed changes from 0 to 1 are almost instantaneous. Therefore, they can be used successfully in digital systems.

     A low speed, low power brushless DC motor can be found in most turntable devices, particularly precision turntable devices. Devices with such motors are things like personal computers (usually, with 3 motors in it, one for the hard drive, and one for the processor cooler), CD & DVD players.

2.Medium Power DC Motors
     Medium power DC Motors have a use too in systems. Generally they are connected to the mains, and use a rectifier to convert the AC current into a DC current to be used for the task in hand. As a result of this, they also need to be stepped down (voltage reduced) so that the current doesn’t overpower the circuit and burn out the motor. This limits their usage to larger systems that require room for both a stepper and a rectifier. But they still serve a purpose, particularly in systems where size nor speed is an issue, just reliability. One such place is in pinsetters in a bowling alley, for example.

3.High Power DC Motors
      Argueably the most common and useful motors are High Power DC Motors. These motors are generally used in open systems, and generally used in systems were torque and power, as well as drive are paramount. Examples of such systems include electric wheelchairs, electric scooters, Segways, hybrid cars, as well as in elevators.

      Of course, with power comes great power usage, and whilst the most energy efficient form of motor, they can require a lot of energy to run. Part of the creative process of using them is to be efficient (drive systems in hybrid cars use the petrol motor’s momentum to recharge a battery, which will be then used to power the DC motor), but generally the battery will need to be recharged or replaced at regular intervals. Even so, it’s usually infrequently the battery needs replacing. Furthermore, any systems attached to the mains don’t suffer from this problem.

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     Solenoids are a specially engineered electromagnet in which a coil of wire is wrapped around a specially shaped core made of steel or iron, it is an integral component in all sizes of motors.

     Solenoids work like this: when electrical current goes through the loop of wire, a magnetic field accumulates around it. A iron or steel path for this force to flow into significantly increases the strength of the magnetic field. Because magnetic energy attempts to take a specific path, flowing from the center of a coil, out one end, down the sides and then reversing that path. If a iron or steel core, called a solenoid, is shaped to fit this path, it will then direct the flow of magnetism through it.

     When a gap is left in the core design, the magnetic flux will flow around the path until it is stopped by the resulting breach. The armature of a solenoid will fill the gap; thus, when the current flows through the coil, it will attract this moveable plunger into the gap, which then completes the electrical circuit. This plunger can subsequently be attached to various mechanical parts, which, in turn, will cause them to move in a particular, defined direction. Depending on which end of the armature is connected to the solenoid, a pushing or pulling motion results. Very often, springs are used to keep the plunger position set to open.

     Electromagnetic motors are based on the basic principle that all current-carrying wire within a magnetic field contains a amount of mechanical force. The larger the motor and the greater the electromagnetic field, the more power is produced. A string of solenoid switches and check valves can be used to harness this power in a specific manner, depending on the force and direction required. The muscle behind any motor is governed by various factors including the number of turns in the coil, the quantity of current flowing through it, the distance end to end of the coil and the magnetic purity of the iron or steel used in the moveable parts.

     In closing, by applying the basics of electromagnetic knowledge and by modifying the parts to withstand the relevant pressure, all motors, regardless of their size operate on this same scientific standard.

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    Electric motor repairs usually need to be done by qualified repairmen or companies that specialize in electric motor repair. If you have an electric motor that is especially large and heavy, you will need to verify with the repair shop that they have the necessary equipment, like cranes, to be able to move your motor.

    When your pool pump motor runs dry and burns up you know you can call your pool technician and he will repair the problem for you or if you need an electric motor repaired on any of your woodworking machines, you generally call in a repairman who works on small machines. When larger more powerful motors develop problems and need parts and repair work it often entails a larger scaled motor repair division found in companies that special in industrial and commercial machine motors.

    These companies tend to have repairmen and technicians who are skilled in working on both A/C motors and D/C motors as well as motors that have a higher horse power. They will also have all the necessary tools and equipment needed to repair your motor back to a pristine state. Many of the large scale electric motor repair shops will have the ability to put a high build epoxy varnish treatment on repaired items as well as to do a Core Loss test, and equipment that can do vibrations testing on the electric motors and parts repaired.

     At times your motor will have become so damaged, often because of too much heat that damages the insulation or because the winding has been cut, that it will need to be rewound. Almost all electric motor repair shops have the equipment required to test for this and can offer you motor rewinding services. Most shops should be experienced enough to be able to rewind all types and sizes of motors, such as for both A/C and D/C motors. With any electric motor repair work done, make sure to check is the shop is a certified warranty repair facility for your type engine manufacturer. If your machine is still under warranty, it is going to be very important that you use a shop that can do certified repair work on your engine.

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       DC motors are usually available in two general types. Alike that, AC motors also come in two different types. They can be two phase or three phase AC motors. Although on technical front, the differences in DC and AC motors are sometimes marginal, but some of these differences make one types better than the other for a certain use. In general, the DC electric motors work for conditions controlling the speed is essential. It is due to the factor that DC motors have a steady and constant current. DC motors are also the first and earliest motors used. But these good factors are also accompanied with some limitations; for instance, the DC electric motors are incapable of producing power over long period of time. Most of the electric companies are aware of the limitation of the DC motor and have found that the power was lost as the electric current was transmitted. One of the variant, the Brush DC motors, use certain rings that conduct the current and form the magnetic drive that runs the rotor. On the other hand, the brush-less DC electric motors bring forth a switch to generate the magnetic drive that powers the rotor. Direct current motors commonly used in most of the electric appliances in your home.

       Now coming back to the AC motors we find that these kinds of motors are commonly used on the basis of their type. For instance, the single phase AC motors are used for general purpose. This type of motors will work efficiently in different conditions. AC motors are effective for systems that are hard to start because they need a lot of power for this purpose. The three phase AC motors, also called polyphase, are commonly found in industrial sector. The AC motors have a high starting power built to transmit lower levels of overall power. As it alternated the power, so it gets its name AC. The amount of power specified by an AC motor is determined by the amount of power needed to operate the system.

       Generally, the DC and AC electric motors are easily come across everywhere from the home to the car to industrial uses. The introduction of DC motors is still considered no less than a revolution and when AC motors were available in the market the way motors were looked at changed because of their amazing starting power potential. DC motors and AC motors are different in many ways, but they still both are used to power the world of electric appliances.

The world of electric motors is quite fascinating. For many making and collecting various types of electric motors is a hobby and for others making the best electric motors to power various devices is a profession. Whatever the approach is, but electric motors offer innumerable possibilities for improvisation. Working with electric motors and understanding them is a rewarding and learning experience. Let us find out more about electric motors in general. Usually, electric motors can be classified into two main types. They are direct current or DC and alternating current or AC motors. DC or AC is very common terms and they refer to how the electrical current is transferred through and from the motor. Both types of motors have different utilities and uses.

       DC motors are usually available in two general types. Alike that, AC motors also come in two different types. They can be two phase or three phase AC motors. Although on technical front, the differences in DC and AC motors are sometimes marginal, but some of these differences make one types better than the other for a certain use. In general, the DC electric motors work for conditions controlling the speed is essential. It is due to the factor that DC motors have a steady and constant current. DC motors are also the first and earliest motors used. But these good factors are also accompanied with some limitations; for instance, the DC electric motors are incapable of producing power over long period of time. Most of the electric companies are aware of the limitation of the DC motor and have found that the power was lost as the electric current was transmitted. One of the variant, the Brush DC motors, use certain rings that conduct the current and form the magnetic drive that runs the rotor. On the other hand, the brush-less DC electric motors bring forth a switch to generate the magnetic drive that powers the rotor. Direct current motors commonly used in most of the electric appliances in your home.

       Now coming back to the AC motors we find that these kinds of motors are commonly used on the basis of their type. For instance, the single phase AC motors are used for general purpose. This type of motors will work efficiently in different conditions. AC motors are effective for systems that are hard to start because they need a lot of power for this purpose. The three phase AC motors, also called polyphase, are commonly found in industrial sector. The AC motors have a high starting power built to transmit lower levels of overall power. As it alternated the power, so it gets its name AC. The amount of power specified by an AC motor is determined by the amount of power needed to operate the system.

       Generally, the DC and AC electric motors are easily come across everywhere from the home to the car to industrial uses. The introduction of DC motors is still considered no less than a revolution and when AC motors were available in the market the way motors were looked at changed because of their amazing starting power potential. DC motors and AC motors are different in many ways, but they still both are used to power the world of electric appliances.

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