UPS systems are generally used for large-scale centralized inverter

UPS systems are generally used for large-scale centralized inverter PV power plant (> 10kW), the number of parallel PV strings are connected
To the same central inverter DC input Outdoor cabinet of the general three-phase IGBT power module, use less power field effect transistor, using DSP switch controller to improve the quality of the output power, making it very close to sinusoidal current. The maximum power of the system is characterized by high and low cost. But the influence of PV string matching and partial shading, resulting in efficiency and power capacity of the entire PV system. At the same time the entire photovoltaic computer ups power supply generation system reliability by poor working conditions of a photovoltaic cell groups affected. The latest research is the use of space vector modulation control, as well as the development of new inverter topology of connections to achieve high efficiency under partial load conditions. On SolarMax (Shohreh Mike) central inverter, you can attach an interface box PV array, photovoltaic panels on each string string monitoring, such as a string which is not working properly, the system will put the information passed to the remote controller, and can be stopped by a bunch of these remote control, so as not to because of the failure of a string of PV strings and impact of the work and reduce the energy output of the entire PV system

UPS inverter power stage one pair amplifier transistor is damaged

UPS inverter power stage one pair amplifier transistor is damaged, replace the same type of transistor after running for some time because they burn too much current, caused by excessive current reasons:
- Overcurrent failure. When the inverter output overcurrent, the overcurrent protection circuit does not work;
- Pulse Width Modulation (PWM) component failure, the two complementary output waveform asymmetry, a long lead-time, on-time and short the other, so that the work of unbalanced arms, even the arms are turned on simultaneously, resulting in two tube is damaged;
- Solar panel inverter difference between the larger tube parameters, then even if the input waveform symmetry, the output will be asymmetrical, the waveform is output transformer, causing magnetic bias, ie the flux imbalance, leading to the accumulation of down transformer saturation current surge, burn computer ups power supply tube, and a burn, the other also will burn.
4, after UPS boot, no display on the panel, UPS does not work.
Failure Analysis: From Symptom judgment, the failure in the mains input, battery and mains detection portion and the battery voltage detection circuit:
- Check the mains input fuse is burned;
- If the mains input fuse is good, check the battery insurance burned, because some UPS when the battery voltage is less than the self-test, all of the output of the UPS and the display will be closed;
- If the battery insurance intact, check the mains detection circuit is working properly, if the mains detection circuit is not working properly and the UPS does not have no electricity start function, UPS also will shut down all output and display.
- If the city detection circuit is working properly, then check the battery voltage detection circuit is normal.

 

and the computer ups power supply factor is not only the current phase

1) and the computer ups power supply factor is not only the current phase b (fundamental) and the voltage between the relevant and related to the current pulse width, even if the current (fundamental) and the voltage phase  difference between the b = 0, i.e., the current (base when the center line coincides with the wave), and the voltage based on the calculated F (a) still is not 1, and the pulse width becomes narrower as the current increases.
2) Due to the forefront of the current pulse is relatively steep, so the harmonic frequency of the current offer relatively high and rich, space launch capability to offer relatively strong.
If the UPS input circuit is a diode rectifier or a thyristor rectifier, the power factor thereof is not caused by a phase difference, but by strong interference caused by a current pulse. These high-order harmonic currents all the way to form a series mode interference Shao fleeing through electrical equipment, another way out in the form of electromagnetic radiation, the formation of RF interference nearby devices, especially so that the radio communication can not be normal.

AC-to-DC power practical

AC to DC power supply: high quality imported IGBT is used as the main power devices, AC to DC power to Nanocrystalline (telecom ups )-based soft magnetic alloy transformer core, the main control system uses a multi-loop control technology, structure acidification on the measures taken by the anti-salt spray. Power reasonable structure, computer UPS power supply AC-to-DC power supply and strong reliability. The power of its small size, light weight, high efficiency, high reliability superiority of SCR power supply replacement products. AC to DC power applied to the experiment, oxidation, electrolysis,telecom ups zinc, nickel, tin, chrome, optoelectronics, smelting, into a variety of precision surface computer UPS, corrosion and other disposal sites. In anodizing, computer UPS power vacuum coating, electrolysis, electrophoresis, telecom ups water treatment, electronics aging,telecom ups  electric heating, electrochemical and other aspects have also been users alike. telecom upsSolar-powered UPS AC to DC power supply, electroplating,telecom ups  UPS solar-powered electrolysis industry sectors, telecom ups as many customers preferred source products. Computer AC to DC power supply UPS lower porosity, the rate of formation of nuclei is greater than the growth rate,telecom ups to promote nucleation refinement.AC to DC power supply to improve adhesion,telecom ups the computer UPS AC power to a DC power breakdown in the passivation film, a strong bond between the beneficial and the substrate layer.telecom ups Improve the coverage and dispersibility, high AC to DC power supply negative cathode passivation potential so that ordinary plating deposition site can mitigate the protruding telecom upsparts form part due to the deposition of complex ions bring excessive consumption "burningtelecom ups dendritic" deposition defects, to obtain a given thickness of the coating properties can be reduced to the original,telecom ups  AC-to-DC power saving raw materials.telecom ups Solar-powered UPS and UPS power supply computer coatings reduce stress, telecom ups improve lattice defects,telecom ups  impurities, voids, build-up, etc.,(telecom ups ) easy to get crack-free coating, reducing additives. telecom upsAC to DC power supply is conducive to the stability of the alloy coating composition obtained. Solar-powered UPS UPS and computer power to improve dissolution of the anode, the anode without activator. AC to DC power telecom ups supply of the coating improved telecom ups mechanical properties, such as increasing the density and reducing the volume resistivity of the surface resistance,telecom ups improved toughness, wear resistance, corrosion resistance and hardness of the coating can be controlled.

UPS power is the role of the computer?

Computer UPS power: when the normal electricity, telecommunications company's computer after UPS power mains rectifier power to the load from the inverter; mains power is not normal, the storage of electrical power to the load via the inverter, no conversion time of it. telecom ups input and output links are controlled independently of each other,telecom ups so the ability to adapt to the mains input is very strong, especially reflected in the ability to adapt to changes in frequency.telecom ups telecom ups line UPS power output is high-quality sine wave AC power supply,telecom ups  frequency and voltage stability,telecom ups  the precision is very high.telecom ups Moreover, the telecommunications company computer computer UPS power supply due to the on-line UPS power supply input filter,telecom ups a telecommunications company computer UPS power supply AC mains input filter becomes rectified DC,telecom ups  and then by the inverter output sine wave inverter output filter through the power of the highest quality, computer UPS power protection performance so that the output of the best of the ability to suppress noise and surge mains strongest.telecom ups telecom ups line interactive UPS power the inverter is connected in parallel between the mains and the load,telecom ups since the role of back-up power,telecom ups  while the inverter as a charger to charge the battery through the inverter reversible operation mode,telecom ups telecom ups interactions with electricity, telecom ups computer UPS power supply and therefore action is called interactive such UPS, normal in the city, the load from the power supply through the city improved, while the inverter as a charger to charge the battery, the computer plays a UPS inverter power converter;telecom ups when the electricity is not normal, telecom ups the load is completely powered by the inverter, inverter plays the role of a computer UPS power converter.