A voltage stablizer is a device that stabilizes the output voltage. Voltage regulator consists of voltage regulating circuit, control circuit, and servo motor. When the input voltage or load changes, the control circuit for sampling, comparison, amplification, and then drive the servo motor rotation, so that the position of the carbon brush regulator changes, by automatically adjusting the coil turns ratio, so as to maintain the stability of the output voltage.
A typical switching capacitive converter consists of four large MOS switches that are switched in a typical switching sequence, doubling or halving the input supply voltage. The transfer and storage of energy are provided by external capacitors. With the problems in market environment, production and operation, import and export of products, investment environment and sustainable development of isolating transformer products in China, the company has made qualitative and quantitative analysis and prediction of the industry development trend on this basis. Engaged in transformer, voltage regulator, voltage regulator and other low-voltage supporting products production, research and development, sales, "adhere to enterprise innovation, The main products are :SBW high power compensation voltage regulator, SBW-F power regulator, SVC high precision automatic AC voltage regulator, precision purification voltage regulator, microcomputer contact-free voltage regulator, SG\SBK isolation transformer, OSG\QZB autotransformer, ZSG\ZDG rectifier transformer, SSG servo transformer, DN resistance welding Complete sets of electrical equipment such as water-cooled transformer, reactor, contact type auto-coupling voltage regulator, column type high-power electric voltage regulator, etc. Product design novel, small size, beautiful appearance, with low loss, low noise, impact resistance and other advantages. It is widely used in industrial and mining enterprises, textile machinery, printing and packaging, petrochemical industry, schools, shopping malls, elevators, posts and telecommunications, medical machinery and other occasions requiring normal voltage guarantee.
In the first part of the switching cycle, the input voltage is applied to a capacitor (C1). In the second part of the switching cycle, charge is transferred from C1 to a second capacitor, C2. The most conventional construction of a switched capacitive converter is a reverse converter in which C2 has a grounded positive terminal whose negative terminal transmits negative output voltage. After several cycles, the voltage across C2 will be applied to the input voltage. Assuming no load on C2, no loss on the switch, and no continuous resistance in the capacitor, the output voltage will be exactly the negative of the input voltage. In reality, the efficiency of charge transfer (and hence the accuracy of the output voltage) depends on the switching frequency, the resistance of the switch, the value of the capacitor, and the continuous resistance. A similar topological voltage doubler uses the same switches and capacitor banks, but changes the ground connection and input voltage. Other, more sophisticated variants use additional switches and capacitors to achieve other conversion ratios of input voltage to output voltage and, in some cases, use specialized switching sequences to generate fractional relationships (e.g., 3/2). In its simplest form, switched capacitive converters do not have a voltage regulator. Some of the new National semiconductor switched capacitive converters have gain levels that are automatically adjusted to produce a regulated output; Other switched capacitive converters use a built-in low voltage drop linear regulator to produce an unregulated output.
Technical parameters
A. The voltage regulator has an input voltage range. The IEC standard is that the input voltage varies within ±20 of the rated value. Beyond the range of automatic sound and light alarm and can not make the output voltage stable in the required range.
B. Output voltage adjustment rate refers to the effect of output changes caused by input voltage changes. When the load is rated, the input voltage is raised from the rated value to the 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, is an important index to measure the performance of ac voltage regulator.
C. Load adjustment rate: it is the effect of the change of output caused by the change of load. Change the load current and measure the output voltage change (±). The smaller the value, the better, is also an important indicator to measure the performance of ac voltage regulator.
D. relative harmonic content of output voltage (also called the output voltage distortion degree), usually expressed in THD, is the total RMS of harmonic content and the ratio of the fundamental wave RMS, when load rating, input voltage distortion (generally should be less than 3) while the benchmark condition, when the input voltage is low, the ratings and high measurement output voltage distortion degree, take its largest. The smaller the value, the better.
E. Efficiency: is the ratio (percent) of output active power P0 to input active power Pi,
F. Load power factor
Voltage regulator capacity is expressed by volt-ampere (VA) or kilovolt-ampere (KVA) value, is the load in addition to pure resistive load, and inductive and capacitive load, that is, in addition to active power in the load, and reactive power. This pointer reflects the ability of an AC regulated power supply to carry inductive and capacitive loads.
General AC stabilized power supply, the load power factor COS φ is 0.8, when the product is 1KW, the output active power (that is, the capacity of resistive load) is up to 800W. If the product is expressed with 1KW (cosφ is still 0.8), the active power can be output 1KW, then the output power S=1000/0.8=1250VA. When the value of load power factor is small, it indicates that the power supply equipment has a strong ability to adapt to electrically resistant load.
G. ac voltage stabilizer parameters and output power, input frequency, source frequency effect, random bias drift (time), the no-load input power, the source power factor (this value and the load power factor is different, hope that the bigger the better, up to 1), audio source current relative harmonic content, noise, etc, three-phase ac regulated power supply, and degree of unbalanced three-phase output voltage, The definition and test method of these Pointers can refer to relevant standards.
Voltage regulator can be widely used in: industrial and mining enterprises, oil fields, railways, construction sites, schools, hospitals, post and telecommunications, hotel, scientific research departments such as computer, precision machine tools, computer tomography (CT) of photography, precision instruments, test equipment, elevators, lighting, imported equipment and production lines and other places of need stable power supply voltage. It is also suitable for the users at the end of the low-voltage distribution network with too low or too high power supply voltage and large fluctuation range and the power equipment with large load variation, especially suitable for all the stable voltage power supply places with high requirements on the grid waveform. High power compensation type power regulator can receive fire power, water power, small generator.
Voltage regulator is a kind of power supply circuit or power supply equipment that can automatically adjust the output voltage. Its role is to stabilize the power supply voltage that fluctuates greatly and cannot meet the requirements of electrical equipment in its set value range, so that all kinds of circuits or electrical equipment can work normally under the rated working voltage.
The first electric voltage regulators relied on the beating of relays to stabilize the voltage. When the grid voltage fluctuates, the automatic correction circuit of the power regulator starts to make the internal relay act. Force the output voltage to keep near the set value, this circuit has the advantage of simple circuit, but the disadvantage is that the accuracy of voltage regulation is not high, and every time the relay jumps and changes the gear, the power supply will have an instantaneous interruption and produce spark interference.
This to the computer equipment read and write work interference is very big, easy to cause the computer error signal, serious will also make hard disk damage.
High quality small voltage regulator, most of the use of motor drag carbon brush method to stabilize the voltage, the voltage regulator on electrical equipment interference is very small and relatively high accuracy.
