Генератор постоянного тока

Описание и отзывы

Трекер стоимости

Характеристики

 

 

 

one. use

The machine for middle school and primary school physical natural common sense teaching demonstration AC and DC generators with the basic structure and working principle.

two. structure

This generates a magnetic field generator is a permanent magnet rotating armature.

Magnetic ferrite material accompanied by two one pair of boots produced material.

Armature core made of an iron-based powder metallurgy, on which hundreds of turns around the high-intensity enameled copper wire, both ends of the coil are connected to two copper rings, copper rings are manifold and commutation of the Union use devices. Its shape is flattened one end, the other half of the projection head, the two complement each other brass ring convex portion into two half-rings for the commutator with the rings at both ends for the slip ring with.

Armature and copper rings mounted on a rotary shaft and the shaft insulation. One end of the shaft is provided with a pulley bearing is fixed to the pole pieces of a metal frame.

With a pair of brushes made of tin bronze piece on the bearing frame, you can move back and forth in the brush slider, when a pair of brushes pressing on two half rings, used to output DC, when a pair of brushes When the pressure in the two rings were used to output AC.

Armature generator consists of a large hand wheel brings with skin transmission, cranks large wheels can be removed.

The entire device is mounted on the base board, the board has two terminals and a lamp holder base together with a light bulb.

three. skills requirement

When the rotor speed of 1600 rev / min, the output terminal voltage of the machine: the no-load voltage is not less than 8V; string into 4.8V, 0.3A small bulbs, the load pressure of not less than 5V.

four. usage

As required output is also AC DC, the brushes are placed at both ends or in the middle with the ring. As do power supply when the foreign board from the base on the access terminal.

When using a hand press in the wood base, shake uniform handedly turn the big wheel, you can have the power output, shaking speed is not too fast, so the output voltage is too high, the lamp burned.

The connector demo galvanometer, voltmeter should be installed, do not separate series current meter, if necessary, a sliding rheostat in series as load.

Fives. maintenance

1. The majority of equipment failure and break loose wiring, (due to moisture and corrosion). So it can avometer to check whether the line is disconnected from the power generation if not shaken.

2. The armature and pole piece gap is very small, if the bearing is loose, it is easy to get stuck armature. The reason this time to check and adjust the position of the pole pieces and the bearing, the armature in the pole piece can be flexible rotation, usually pay attention to proper bearing lubrication.

3. The belt should pay attention to prevent oil and high temperature should be removed from the pulley belt after use to prevent the belt slipping too loose.

4. Brush the terminal and the bracket to be insulated, if short-circuited because the screws are loose, should be adjusted.