Low Frequency Solar Energy Inverter

FT series low frequency solar energy inverter

   Since the measuring device of the multimeter is a DC microammeter head, when measuring the AC voltage, a rectifier element must be introduced to form an AC voltmeter of the rectifier system. The AC voltage block of the multimeter is the AC voltmeter with sufficient current.

   The rectifier circuit of the multimeter can use half-wave rectification and full-wave rectification. The average current after rectification can be applied to measure the DC voltage to measure the AC voltage.

   People are always used to measuring AC voltage in effective value, so the system on the dial of the multimeter is also expressed in effective value. The ratio of the effective current I of the sinusoidal alternating current to the average current I is called the form factor and expressed in Kf.

   For full-wave rectification Kf=1.11, for half-wave rectification Kf=2.22.

   In fact, the AC voltage measurement circuit of the multimeter mostly adopts the half-wave current reporting method.

Measuring principle of AC voltage

   However, the voltage values on the two scale lines are far from each other, so the two scale lines - k must be marked with the voltage value. The other is that when measuring AC and DC voltages, each set of multiplier resistors is used, so that the same scale line can be used for the AC and DC voltage scales.

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