SOROTEC UPS

Physical environment is usually neglected when  UPS  is selected by industrial enterprises. Due to the influence of production and manufacturing site factors, there are many problems in industrial application environment, such as high temperature, humidity, large amount of dust and serious air pollution. In special industrial occasions, the air in the environment may also contain corrosive gases, or the body inclines in the case of vibration, which may easily lead to short-circuit of UPS internal components and power supply failure. Therefore, UPS need to have a strong environmental adaptability, to respond to the test of harsh environment with comprehensive performance. From the point of view of electrical environment, the precise production equipment of the production line always has very stringent requirements for power supply. Power grid pollution in industrial application site is very serious, and it often faces special power supply and special industry standards. As t...

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...

Usually the harmonic current is proportional to the working current of the harmonic source equipment. Dynamic  harmonic filter , which measures load harmonic current by controller, controls bi-directional thyristor zero-crossing trigger, realizes dynamic harmonic filtering and reactive power compensation for non-linear load, and has no impact, inrush and transition during switching process. 1.Automatically tracking the harmonic of compensating change has high controllability and fast responsiveness. Compensation performance is not affected by the frequency fluctuation of power grid, and filtering characteristics are not affected by system impedance, which can eliminate the risk of resonance with system impedance. 2.It can not only control harmonics, but also compensate reactive power, restrain flicker and improve power factor. It can independently compensate for a single harmonic source or centrally compensate for multiple harmonic sources. The specified sub-harmonics are el...

The common structure of on grid  solar power generation system  includes centralized, series, multi-series and AC modules. In centralized, series and multi-series systems, there are series and parallel solar cell modules, so the maximum power point tracking of the system is aimed at the whole series-parallel solar cell array, which can not take into account each solar cell array in the system. The utilization of single solar cell array is low, the system has poor ability to resist local shadows, and the system expansion flexibility is not enough. The  solar on grid micro-inverters  are connected with a single solar cell module, which can directly convert the DC output of the solar cell module into AC and transmit it to the grid. They have the following advantages: 1.It ensures that each solar cell module runs at the maximum power point, and has a strong ability to resist local shadows. 2.By integrating micro-inverters with solar cell modules, can realize modular...