Combination structure of pointer ammeter
The pointer ammeter is an ammeter that works on the principle of magnetoelectricity, drives the pointer to move, and relies on the position of the pointer on the panel to display the degree.
composition structure
The measuring mechanism of the magnetoelectric system electrical instrument is composed of a fixed magnetic circuit system and a movable part. The magnetic system of the meter consists of permanent magnets
1 pole palm fixed on the poles of the magnet
2 and the cylindrical iron core between the two pole palms
3. The cylindrical iron core is fixed on the instrument bracket, which is used to reduce the magnetic resistance and generate a uniform radiating magnetic field in the air gap between the pole palm and the iron core. A movable coil in this magnetic field
4 When deflecting around the axis of rotation, the magnetic fields on the two effective sides are always equal in magnitude, and the directions are perpendicular to the sides of the coil. The movable coil is wound on an aluminum frame. The rotating shaft is divided into front and rear parts, one end of each half shaft is fixed on the moving coil aluminum frame, and the other end is supported in the bearing through the shaft tip. There is also a pointer on the front half shaft, which is used to indicate the size of the measured electricity when the movable part is deflected.
