Views:12 Author:Site Editor Publish Time: 2017-01-10 Origin:Site
A typical switched capacitive converter consists of four large MOS switches whose switching sequence is typical for switching, doubling or halving the input supply voltage. Energy transmission and storage provided by the external capacitor, the company example With China's isolation transformer products in the market environment, production and operation, product import and export, industry investment environment and sustainable development on the basis of China's development trend on the industry to do A qualitative and quantitative analysis of the combination of prediction. The main products are: SBW high-power compensation type power regulator, SBW-F split power regulator, power regulator, power regulator, SVC high-precision automatic AC voltage regulator, precision purification regulator, microcomputer non-contact regulator, SG \ SBK isolation transformer, OSG \ QZB autotransformer, ZSG \ ZDG rectifier transformer, SSG servo transformer, DN resistance welding Water-cooled transformers, reactors, contact-type autotransformer, column-type high-power electric voltage regulator and other sets of electrical equipment. Product design novel, small size, handsome in appearance, with low loss, low noise, impact resistance and other advantages. For industrial and mining enterprises, textile machinery, printing and packaging, petrochemical, schools, shopping malls, elevators, post and telecommunications, medical machinery and other needs of the normal voltage guarantee occasions.
In the first part of the switching cycle, the input voltage acts on a capacitor (C1). In the second part of the switching cycle, the charge is transferred from C1 to the second capacitor C2. The most traditional switched capacitive converter is constructed as an inverse inverter, where C2 has a grounded positive terminal and its negative terminal transmits a negative output voltage. After several cycles, the voltage through C2 will be applied to the input voltage. Assuming there is no load on C2, there is no loss on the switch and there is no continuous resistance in the capacitor, the output voltage will be exactly the negative of the input voltage. In reality, the efficiency of the charge transfer (and the resulting output voltage accuracy) depends on the switching frequency, the resistance of the switch, the value of the capacitor, and the continuous resistance. A similar topology of the voltage doubler uses the same switch and capacitor bank, but changes the ground connection and the input voltage. Other more complex variants of products use additional switches and capacitors to achieve other conversion ratios of the input voltage to the output voltage, and in some cases, use a special switching sequence to produce a fractional relationship (eg 3/2). In all the simplest forms, the switched capacitor converter does not have a regulated function. Some of the new National switched switched capacitive converters have an automatically adjustable gain level to produce regulated output; other switched capacitive converters use a built-in low dropout linear regulator to produce an unregulated output.
A. The regulator has an input voltage adaptation range. IEC standard for the input voltage within ± 20 of the rated value. Out of range that is automatic sound and light alarm and can not make the output voltage stabilized within the required range.
B. The output voltage regulation rate is the effect of the change of the input voltage caused by the change of the input voltage. When the load is rated, the input voltage is adjusted from the rated value to the upper limit and the lower limit value by the source voltage range. The maximum change in output voltage (±). The smaller the value, the better the performance of AC voltage regulator is an important indicator.
C. Load regulation: the effect of changes in output caused by changes in load. Change the load current to measure the amount of change in output voltage (±). The smaller the value the better, but also an important measure of AC regulator performance indicators.
D. The output voltage relative to the harmonic content (also known as the output voltage distortion), usually expressed by THD, is the harmonic content of the total RMS and fundamental RMS ratio, when the load rating, input voltage distortion to meet the benchmark (Generally less than 3), the output voltage is the lowest value, the rated value and the maximum value of the measured output voltage distortion, whichever is the largest. This value is as small as possible.
E. Efficiency: The ratio of the output active power P0 to the input active power Pi (percentage)
F. Load power factor
The regulator capacity is expressed in terms of voltammetry (VA) or KVA (KVA), which is the load in addition to the pure resistive load, there are inductive and capacitive loads, that is, the load in addition to active power, there are no Power power. This indicator reflects the ability of AC regulated power supplies to be inductive and capacitive loads.
General AC power supply, the load power factor cosφ is 0.8, when the product is 1KW, the output of active power (that is, with resistive load capacity) up to 800W. If the product is expressed in 1KW (cosφ is still 0.8), Output active power 1KW, then the output power S = 1000 / 0.8 = 1250VA. When the load power factor is small, it indicates that the power supply is capable of adapting to the reactive load.
G. AC regulator parameters are 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 hope that the bigger the better, the largest 1) ﹑ source current relative harmonic content ﹑ audio noise, etc., three-phase AC power supply, there are three-phase output voltage imbalance, etc., the definition of these indicators and test methods can refer to the relevant standards.
Voltage regulator can be widely used in: industrial and mining enterprises, oil fields, railways, construction sites, schools, hospitals, post and telecommunications, hotels, research and other departments of electronic computers, precision machine tools, computer tomography (CT), precision instruments, Elevator lighting, imported equipment and production lines and other places need to stabilize the power supply. But also adapted to the power supply voltage is too low or too high, large fluctuations in the end of the low-voltage distribution network users and load changes in large electrical equipment, especially for all high demand for power grid voltage regulator. High power compensated power regulator can be connected to fire, hydraulic, small generators.
Regulator is a can automatically adjust the output voltage of the power supply circuit or power supply equipment, its role is to fluctuate and reach the electrical equipment requirements of the power supply voltage stabilized in its set value range, so that a variety of circuits or electrical The device can operate normally at rated operating voltage.
The initial power regulator is based on the relay's jitter stabilized voltage. When the grid voltage fluctuations, the power regulator automatically corrects the circuit to start, so that the internal relay action. Forcing the output voltage to remain near the set value, this circuit has the advantage of simple circuit, the disadvantage is the regulator accuracy is not high and each relay jitter shift, will make the power supply instantaneous interrupt and spark interference.
This computer equipment to read and write work a lot of interference, likely to cause the computer error signal, serious damage to the hard disk.
High-quality small voltage regulator, mostly using the motor to drag the carbon brush method to stabilize the voltage, this regulator on the electrical equipment generated by the interference is relatively small precision is relatively high.