The electronic energy meter is an instrument used to measure electric energy. Everyone has at least one electric meter in the house. But many people only know that the watt-hour meter is an instrument used to measure electricity, and they don’t know how to look at the watt-hour meter. They have only a very vague understanding of the calculation of the watt-hour meter.
When the meter is connected to the circuit under test, alternating current flows through the current coil and the voltage coil. Alternating magnetic flux passes through the aluminum disk, generating eddy currents in the aluminum disk. The vortex is in turn subjected to the force in the magnetic field, causing the aluminum disk to rotate with torque. The greater the power consumed by the load, the greater the current passing through the current coil, the greater the eddy current induced in the aluminum pan, and the greater the torque on the aluminum pan. In other words, the torque is proportional to the power consumed by the load. The greater the power and the greater the torque, the faster the aluminum plate will spin. When the aluminum disk rotates, it is affected by the braking torque generated by the permanent magnet, which is opposite to the main torque. The braking torque is proportional to the rotation speed of the aluminum disc. The faster the aluminum disc rotates, the greater the braking torque. When the active torque and braking torque reach a temporary balance, the aluminum disc will rotate at a uniform speed. The electrical energy consumed by the load is proportional to the number of revolutions of the aluminum plate. When the aluminum plate rotates, it drives a counter to indicate the power consumed. This is a simple process for the work of the Electromechanical KWh Meter.