Adapter / Power Supply

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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.

Definition and Main Components of Synchronous motors

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Synchronous motor is an AC motor, working on speed fixed frequency of the system. These motors require Direct Current (DC) for excitation and have a low starting torque, and therefore synchronous motor suitable for use beginning with low load, such as air compressors, frequency changes and the motor generator.

Synchronous motor is able to correct the power factor of the system, so often used in systems that use a lot of electricity.

The main components of a synchronous motor are:

Rotor. The main difference between synchronous motors with induction motor is that the rotor synchronous machine running at the same speed as the rotating magnetic field. This is possible because the magnetic field of the rotor is no longer induced.

The rotor having permanent magnets or DC-excited, which forced to lock in a certain position when confronted with another magnetic field.

Stator. Stator produces a rotating magnetic field, which is proportional to the frequency supplied.

AC Generator Excitation

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Excitation system conventionally from an alternating current generator consisting of a direct current source connected to the AC generator field via slip-rings and brushes. DC source is usually obtained from a direct current generator driven by the motor or drive the same first mover generator back and forth at first. After the arrival of solids, some of the different excitation systems have been developed and used.

In similar systems, it is used by the generator with a capacity greater power is the power rectifier incorporated into solids separate from the three-phase winding that is located above the generator stator grooves. The only function of this coil is to provide excitation power for the generator.

Output that have rectified from the exciting AC, given directly to the relationship that was isolated along the shaft to a rotating field synchronous generators. The field of the exciting ac is stationary and powered from a separate DC source. Means, that the voltage generated by the synchronous generator can be controlled by changing the exciting AC field strength.