Novel mechanical ammeter

Abstract

The invention discloses a novel mechanical ammeter. The novel mechanical ammeter includes a bottom housing; wiring terminal holes are formed in the bottom housing; a supporting seat is arranged in thebottom housing; a first mutual inductor is arranged on an upper part of the supporting seat; a second mutual inductor and a third mutual inductor are arranged on a lower part of the supporting seat in parallel; a rotation shaft is rotatably connected to the supporting seat; an upper aluminum round plate and a lower aluminum round plate are arranged on the rotation shaft; the upper aluminum roundplate is arranged on the first mutual inductor; the lower aluminum round plate is arranged on the second mutual inductor and the third mutual inductor; a brake permanent magnet fixedly connected to the supporting seat is arranged on the upper aluminum round plate; a threaded column is arranged on an upper end of the rotation shaft; a mechanical counter is arranged on the upper part of the supporting seat; the mechanical counter includes a counting rack, a counting plate, a counting gear, a first transmission gear, a second transmission gear, and a third transmission gear; and the third transmission gear is drivingly connected to the threaded column. The mechanical meter is small in metering errors, is easy to read, is perfect in function, and is high in practicability.

Description

technical field [0001] The invention relates to a mechanical counter device, in particular to a novel mechanical electric meter. Background technique [0002] Most of the existing electricity meters are digital display meters, but mechanical meters are also used in some regions or countries. Mechanical meters still have their unique advantages in high temperature and high humidity areas. In a specific area, it has many advantages such as high accuracy, good stability, and long life. [0003] The usual way to read the electricity of a three-phase four-wire mutual inductance watt-hour meter is to multiply the counter reading by the ratio of mutual inductance. Because the main structure of a mechanical watch is composed of a voltage coil and a current coil (that is, a transformer), a rotating shaft, a brake magnet, a gear, a counter, and the like. The working principle of the mechanical watt-hour meter is: when the meter is connected to the circuit under test, an alternating ...

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Problems solved by technology

[0004] In the above process, due to the conversion of electric energy to the rotation of the counter, the counting error is caused by factors such as friction torque. At the same time, the traditional way of reading the electric quantity is to multiply the electric quantity displayed by the counter by the ratio of the mutual inductance, which leads to a large measurement deviation of the mutual inductance electric meter. not effectively

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