What kind of instrument is composed of a rotating coil and a rotating shaft hairspring mechanical wi

It is composed of a rotating coil and a rotating shaft hairspring mechanical withering mechanism: a magnetoelectric instrument.

Introduction: The structure of a magnetoelectric meter is as follows: there is a permanent magnet inside, and a coil is framed by two hairsprings.

Working principle: When a small current is introduced into the coil, the current is affected by the force of the magnetic field, and the hairspring is also a spring, when the coil is deflected, the hairspring will produce a torque in the opposite direction, and finally the coil will stop in a position. It can be proved that the angle of rotation of the coil is directly proportional to the current in the coil.

Uses: Widely used to measure all kinds of weak DC currents. It can be extended to measure DC voltage, (AC voltage measurement after rectifier device), etc.

The voltmeter is a magnetoelectric instrument, when there is a current passing through the meter, its pointer will be deflected, indicating that it must be affected by the force, and it is affected by the current to produce this force, we will think that the energized conductor will be affected by the force in the magnetic field, so there must be a magnet in these meters.

The electromagnetic instrument is composed of a fixed coil, a rotating iron core and a rotating shaft, a hairspring, a pointer, and a mechanical zeroing mechanism.

A coil usually refers to a coiled wire winding, and the most common coils should be used in the following ways: motors, inductors, transformers, and loop antennas. The coil in a circuit refers to an inductor.

The guide wires are wound one by one, and the wires are insulated from each other, while the insulating tube can be hollow, or it can contain an iron core or a magnetic powder core, referred to as an inductor.

Inductance can be divided into fixed inductance and variable inductance, fixed inductance coil.

Abbreviated as inductor or coil. Expressed by L, the units are Henry (H), Milli Henry (MH), Micro Henry (UH), 1H 10 3MH 10 6UH.

A single-layer coil is made of insulated wires that are wound around a paper tube or bakelite skeleton one by one. Such as transistor radio, medium wave antenna coils.

A single-layer winding is a winding in which only one effective side of the coil is embedded in each stator slot, so its total number of coils is only half of the total number of slots of the motor. The advantage of the single-layer winding is that the number of winding coils and spine brothers is small, and the process is relatively simple; There is no interlayer insulation, so the utilization rate of the groove is improved; The single-layer structure does not suffer from phase-to-phase breakdown failures.

It is not very complete, the fixed iron core should be a fixed bracket, mechanical zero point, range adjustment mechanism, permanent magnet is an important part, without which the moving coil coil can not rotate.

The structure of a magnetoelectric meter is as follows: there is a permanent magnet inside, and a coil that is held together by two hairsprings. How it works:

When a small current is introduced into the coil, the current is deflected by the force of the magnetic field, and the hairspring is also a spring, when the coil is deflected, the hairspring will produce a torque in the opposite direction, and finally the coil will stop in one position. It can be proved that the angle of rotation of the coil is directly proportional to the current in the coil. Usage:

It is widely used to measure a wide range of weak DC currents.