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Archive for November, 2011

Knowing the Types of Electric Motors

November 27th, 2011

The motor is a device that converts electrical energy into mechanical power. The working principle of the electric motor is using Lorentz force, i.e. force that makes an electrically charged wire moving when brought near a homogeneous magnetic field.

On a rotating electric motor part called the rotor and the stationary part called the stator, the rotor part is there is a coil which resulted in the rotor rotates.

Electric motors are grouped into several types depending on how the rotary motors are:

DC Motor
Stepper Motor
Servo Motor

DC Motors

DC motor is a motor that rotates at an angle of 360 degree continuously alias. Dc motor (as the name suggests) is controlled using a DC voltage. The greater the DC voltage DC motor connected to the faster rotation of the motor anyway, but remember not too much exceeding maximum voltage DC motor, if it happens then the spool on a DC motor rotor will drop out due to fire.

DC motors are usually found in children’s toys, tape recorders and photocopies machines (large DC motors)

Stepper Motor

Stepper motor is a motor direction of rotation per step or “step by step”. To control it takes more than 2 pins. Unlike the DC motor, stepper motor is on the rotor, consisting of a solid magnet while in the stator there are several coils.

Servo Motors

Servo motor is DC motors which were given feedback circuit (servo) so that the servo motor rotation can be controlled. To control this servo motor using pulse width modulation or PWM. Here’s a comparison between PWM and swivel angle servo, servo motors usually have a 3 pin i.e. data for PWM.

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Posted in Electric, Motors

Classification and the Speed of Induction Motors

November 18th, 2011

Induction motor can be classified into two main groups:

Single-phase induction motors. This motor has only one stator winding, operates with single-phase power supply, has a squirrel cage rotor, and the need to turn a t-style bike. So far this bike is the most common types of motors used in household appliances, such as wind fans, washing machines and clothes dryers, and to use up to 3 to 4 hp.
Three-phase induction motors. Rotating magnetic field generated by a balanced three-phase supply. These motors have high power capabilities, can have a squirrel cage rotor or coil (although 90% had a squirrel cage rotor), and ignition of its own. It is estimated that about 70% of motors in industrial use of this type, for example, pumps, compressors, conveyor belts, power lines, and grinder. Available in sizes 1 / 3 to hundreds of horsepower.

Induction motor speed

Induction motor works as follows. Electricity is supplied to the stator, which generates a magnetic field. This magnetic field moves around the rotor at synchronous speed. Rotor current produces a second magnetic field, which seeks to counter the stator magnetic field, which causes the rotor to rotate.

However, in practice the motor never runs at synchronous speed but on the “base rate” is lower. The difference between these two speeds is the “slip / slide”, which increases with increasing load. Slip only occurs on induction motors. To avoid slip rings can be mounted a slide / slip ring, and the motor is called “motor ring shear / slip ring motor”.

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Posted in Motors

Tags: Motors

Adapter / Power Supply

November 10th, 2011

Adapter / power supply is a DC voltage source used to provide the voltage or power to various electronic circuits that require a DC voltage to operate. Basic circuit of the power supply is none other than a rectifier which is a circuit that converts the signal back and forth (AC) becomes Direct Current (DC). The resources obtained from the battery, solar cell, generator AC / DC.

Various resources will be discussed, one type of power supply that goes through a process of changing from an AC voltage (alternating) to DC (Direct Current).

Conversion process starts from Rectification by diodes, wrinkle-smoothing voltage (Voltage Ripple Filter) using the setting (regulation) by the regulator circuit.

Settings include the conversion of voltage or current levels. On the technical regulations on the manufacture of power supply, we know the techniques of linear power regulation and switching regulation technique.