pressure regulator
A voltage regulator is a device that stabilizes the output voltage. The voltage regulator is composed of voltage regulating circuit, control circuit, servo motor, etc. When the input voltage or load changes, the control circuit samples, compares, amplifies, and then drives the servo motor to rotate, changing the position of the voltage regulator carbon brush. By automatically adjusting the coil turn ratio, the output voltage is stable. Technical parameters of voltage regulator: A. The voltage regulator has an input voltage adaptation range. The IEC standard is that the input voltage changes within ± 20 of the rated value. If it exceeds the range, it will automatically give an audible and visual alarm, and the output voltage cannot be stabilized within the required range B. The output voltage regulation rate is the effect of output change caused by the change of input voltage. 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. C. Load adjustment rate: it 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 AC voltage regulator. D. The relative harmonic content of output voltage (also called output voltage distortion), usually expressed in THD, 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) Measure the output voltage distortion when the input voltage is the lowest, rated and highest value, whichever is the largest. The smaller the value, the better E. Efficiency: is the ratio (percentage) of the output active power P0 and the input active power Pi. F. The load power factor regulator capacity is expressed in VA or KVA values. It is that there are inductive and capacitive loads in the load in addition to pure resistive loads, that is, there is reactive power in the load in addition to active power. This pointer reflects the capability of AC regulated power supply with inductive and capacitive loads. Generally, the load power factor cos φ of AC stabilized voltage power supply is 0.8. When the product is 1KW, the maximum output active power (i.e. the capacity of resistive load) is 800W. If the product is expressed as 1KW (cos φ is still 0.8), the output active power is 1KW, and the output power 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. G. The parameters of 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 regulated power supply, three-phase output voltage imbalance, etc. The definition and test method of these indicators can refer to relevant standards. Scope of application of the voltage stabilizer: The voltage stabilizer can be widely used in: industrial and mining enterprises, oil fields, railways, construction sites, schools, hospitals, posts and telecommunications, hotels, scientific research and other departments of electronic computers, precision machine tools, computer tomography (CT), precision instruments, test devices, elevator lighting, imported equipment, production lines and other places that need stable voltage of power supply. It is also suitable for users at the end of low-voltage distribution network with too low or too high power supply voltage and large fluctuation range, as well as electrical equipment with large load variation, especially suitable for all stabilized voltage electric fields with high requirements for grid waveform. The high-power compensated power regulator can be connected to thermal, hydraulic and small generators.