Solar Inverter Low Frequency Inverter

FT series :solar inverter low frequency inverter

      Before Ohm, although there was no concept of resistance, the electrical conductivity (conductivity) of metals had been studied. In July 1825, Ohm also studied the relative electrical conductivity of metals using the apparatus used in the above-mentioned preliminary experiments. He made various metals into wires of the same diameter and measured the relative conductivity of gold, silver, zinc, brass, iron and other metals. Although the experiment was crude and had quite a few errors, Ohm thought that the fact that the current was constant throughout the wire showed that the current intensity could be an important fundamental quantity of the circuit, and he decided to make it a major factor in the next experiment. Observations to study.

      In previous experiments, Ohm used a voltaic stack, which had an unstable electromotive force that gave him a headache. Later, it was suggested that the bismuth-copper thermocouple was used as the power supply to ensure the stability of the electromotive force of the power supply.

      In 1826, Ohm derived his law using an experimental setup. There is a current torque balance on the wooden stand, DD' is the glass cover of the torque balance, CC' is the dial, s is the magnifying glass for observation, m and m' are mercury cups, abb'a' is the bismuth frame, bismuth, One leg of the copper frame is in contact with each other, thus forming a thermocouple. A and B are two tin containers used to generate a temperature difference. During the experiment, the conductor to be studied is inserted into two cups containing mercury, m and m', and m and m' become the two poles of the thermoelectric battery.

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