Comparison of stepping electronic meters and traditional electric meters
With the progress of domestic rural power grid construction and reconstruction projects, every household needs to install watt-hour meters. The current electronic watt-hour meter is a relatively novel electrical energy metering device. Its advantages are accurate timing, long service life, and low power consumption. Wide range of applications. This kind of watt-hour meter is mainly composed of plastic cover, magnet, motor, rotating shaft, gear, character wheel housing and other components. Its main disadvantage is that the components are separated and installed, gears and motor parts are inserted into the plastic housing, and the motor torque cannot be measured separately. , The installation process also has large tolerances, and the motor shaft is directly inserted into the hole of the plastic cover plate, causing the motor shaft and the plastic plate to rub directly, thus increasing the motor damping torque and reducing the service life of the watt-hour meter. In addition, the motor housing It is fixed and installed with a plastic cover. It is difficult to prevent the interference of the magnetic field, and it is also difficult to prevent the phenomenon of electricity. Especially the motor spindle is inserted into the plastic shell to mesh with the gear, and the motor spindle is used to fix the gear, so that the gear and the motor cannot be compared. Good coordination, so in the process of use, the meter often jams, making users feel dissatisfied.
The latest electronic watt-hour meter using a stepped electronic counter can overcome the above-mentioned shortcomings.
Metal brackets are used to fix the shielding cover and the stepping motor to prevent electromagnetic interference. The shafts of the gears are all installed in the copper sleeve to reduce noise and ensure gear meshing accuracy.
Compared with the prior art, the stepping electronic counter for electronic energy meters has the following advantages
1. The gear is fixed on the shell by a metal bracket, and the two ends of the rotating shaft are respectively sleeved in the copper sleeve of the bracket and the plastic shell. The noise is low during rotation and the damping torque is also reduced to a minimum.
2. The metal bracket is used to avoid the gear matching accuracy caused by the shrinkage of the plastic bracket, and the service life is improved.
3. Equipped with a shielding cover, so that the external magnetic field will not interfere with the watt-hour meter, so that the motor can work normally, and it also prevents electricity theft.