The power filter is a filter circuit composed of capacitors, inductors and resistors, also known as "power EMI filter", or "EMI power filter", a passive two -way network, one end is the power supply, the other end is a loadEssenceThe principle of a power filter is that the more impedance adaptation networks: the power supply filter input, output side and power supply and load side impedance adaptation, the more effective it is.
Power filter manufacturer
Jinan Botuo Electronic Technology Co., Ltd. is a company specializing in the production of EMI power filters and some EMC products.Jinan Botuo Electronic Technology Co., Ltd. integrates design, research and development, production, and sales, and is committed to providing customers with better and more professional products.Jinan Botuo Electronic Technology Co., Ltd. is one of the largest manufacturers in China. It has advanced production equipment and professional scientific research talents.The products of Jinan Botuo Electronic Technology Co., Ltd. are widely used in the fields of frequency conversion equipment, switching equipment, military equipment, etc.Beijing Zhongyuhao Electric Co., Ltd. is a company that integrates design, research and development, production, and sales.Beijing Zhongyuhao Electric Co., Ltd. is the leader in the industry and is also known as "senior well -known enterprises". The company has many years of production experience and leading scientific production technology.At present, its products have been widely used in military, medical, aviation, industry and other fields.
Power filter selection
First, the power supply type: For example, whether it is a single phase or a three -phase, the three phases are distinguished from the three -phase and three lines and the three -phase and four lines.Second, the rated voltage of the power supply: Common ones are 220V, 380V/400V/440V, 690V, etc.Third, the rated current.The rated current of the EMC filter must be greater than the rated current of the load.This is because the EMC filter has the characteristics of inductance and inductance.The fourth is to see if there is a dedicated type.For example, the inverter, the inverter has a special filter of the inverter, and the servo has a special servo filter.Generally speaking, a dedicated filter is specially designed for specific load characteristics in ordinary EMC filters. Therefore, EMC is better.In special circumstances, it is another matter.
Power filter function
The role of the power cord filter is to prevent the electromagnetic interference generated by the device itself from entering the power line, while preventing interference on the power line from entering the device.The power cord filter is a low -pass filter that allows DC or 50Hz working current to pass without allowing electromagnetic interference currents with high frequency to pass.The power cord filter is two -way, which can prevent the interference on the grid from entering the device to adversely affect the device, so that the device meets the requirements of conduction sensitivity; it can also prevent electromagnetic interference in the device.The power cord is passed to the grid to meet the requirements of the device to meet the requirements of the transmission.Equipment that can produce strong interference and sensitive devices to the outside world must use power cord filters.Device that can produce strong interference is: equipment containing pulse circuit (microprocessor), equipment using switching power supply, device using thyristor, variable frequency speed regulating equipment, and equipment containing motors.Sensitive circuits such as equipment, small signal analog circuits using microprocessors, etc.

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