SOROTEC UPS

1.Based on the rated current of the final electric load (motor), it is better that the rated current of the  harmonic filter  is more than 1.1 times of that of the load current. 2.Look at the rated working current and actual working current of the load, and do not exceed the rated working current of the harmonic filter. 3.Look at the load rate. If the load rate is too low, it will affect the effect of harmonic filter. Please check load rate data when selecting the type. 4.Check the rated working voltage and power frequency of the load equipment to see if it meets the power requirements of the harmonic filter. 5.Attention should be paid to the installation environment of harmonic filters, which meets the requirements of the environment for the use of harmonic filters. 6.It is better to provide the power factor of the load so that suitable capacitors can be installed to achieve the best power factor. SOROTEC Three-phase Balance  Active Harmonic Filter (AHF) Meet...

We know that the input voltage range of 12V power supply server motherboard is usually 5% positive and negative difference. If we adopt the structure of 12V bus + 12V battery BBU, it is difficult to achieve this voltage allowable range. Especially at high currents that may be as high as 23,000 amperes, the voltage drop at impedance of 1 milliohm is as high as 2 or 3 volts, and the voltage drop of copper exhaust is much higher than the voltage range of 5% or about 0.6 V. If the voltage drop is controlled by current sharing among multiple power outlets and buses, in addition to the cost and space mentioned above, additional DC/DC voltage stabilization circuit is needed to ensure the voltage reduction caused by BBU discharge. The total cost of this DC/DC voltage regulator circuit will be very high, which will also lead to the overall uneconomical system. In 48V bus structure, the main board usually has a wide range of input voltage of 36V-58V, bus voltage drop is no longer a problem, and...

Where low-voltage transformers are installed and large-scale electrical equipment should be equipped with reactive power compensation devices, especially those with low power factor must be installed in industrial, mining, enterprises and residential areas. Large asynchronous motor, transformer, welding machine, punch, lathe group, air compressor, press, crane, smelting, steel rolling, aluminium rolling, large switch, electric irrigation equipment, electric locomotive and so on are particularly needed. Apart from incandescent lamp lighting in residential areas, air conditioning, refrigerators and other reactive power consumption objects can not be ignored. In rural areas, the power consumption is relatively poor, the power supply is insufficient in most areas, the voltage fluctuation is very large, and the power factor is especially low. The installation of  static var generator  is an effective measure to improve the power supply situation and improve the utilization rate of...

In  solar inverters , there are parasitic inductances which are harmful to power switching devices. They are stray inductances. Stray inductance will increase with the increase of current, the size of connecting wire and the distance. In the process of IGBT switching off, voltage spikes will occur due to the sharp decrease of current. There are several risks: First, IGBT will be overvoltage. In the case of high current, it is necessary to use IGBT with higher voltage level, but the device with higher voltage level will lose more and cost more. Secondly, voltage spike will also bring additional switching loss, which will reduce system efficiency and increase cost. Reasonable design of interconnected conductors of  inverters  to reduce the inductance and its influence is very important to improve the reliability and operation performance of inverters. Inverters generally adopt the following three methods to reduce stray inductance: 1.Using stacked bus The positiv...