Explain the technical parameters of the voltage regulator in detail

1、 Input range: the voltage regulator has an input voltage adaptation range, and the IEC standard is± 10% range. The input range of our product standards is± 15%, special can be customized in advance, if it is beyond the range, it will automatically sound and light alarm.

2、 Output voltage regulation rate: it is the effect of output change caused by input voltage change. When the load is rated, the input voltage is raised from rated value to upper limit and lower limit according to the source voltage range, and the maximum change of output voltage (±%) is measured. The smaller the value, the better. It is an important indicator to measure the performance of AC voltage regulator.

3、 Load adjustment rate: refers to the effect of output change caused by load change. Change the load current and measure the change of output voltage (±%). The smaller the value, the better. It is also an important indicator to measure the performance of the AC regulator.

4、 Relative harmonic content of output voltage: (also called output voltage distortion) is usually expressed in THD, which is the ratio of the total effective value of harmonic content to the fundamental effective value. When the load is rated and the input voltage distortion meets the reference conditions (generally less than 3%), the output voltage distortion is measured when the input voltage is the lowest, rated and highest value, whichever is the largest. The smaller the value, the better.

5、 Efficiency: the ratio (percentage) of the output active power P0 and the input active power Pi.

6、 Load power factor: the voltage regulator capacity is expressed in volt ampere (VA) or kilovolt ampere (KVA) values. In addition to pure resistive load, there are inductive and capacitive loads in the load, that is, in addition to active power, there is reactive power in the load. This reflects the ability of AC regulated power supply with inductive and capacitive loads. General AC regulated power supply, load power factor cosφ Is 0.8, when the product is 1KVA, the output active power: (i.e. the capacity of resistive load) is 800W at most. If the product is represented by 1KW (cosφ is still 0.8), the output active power is 1KW, and the output power is S=1000/0.8=1250VA. A small value of load power factor indicates that the power supply equipment has a strong ability to adapt to reactive load.

7、 Other parameters of the AC voltage regulator include output power, input frequency, source frequency effect, random deviation (time drift), no-load input power, source power factor (this value is different from the load power factor, the larger the better, and the maximum is 1), relative harmonic content of source current, audio noise, three-phase AC voltage stabilized power supply, and three-phase output voltage imbalance. The definition and test methods of these indicators can refer to relevant standards.