PM3700-80

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Common Mode Chokes are a type of power supply filter used to reduce electromagnetic interference and provide a measure of safety for both the user and the power source. The PM3700-80 is a common type of Common Mode Choke designed to improve the performance of devices connected to a variety of electrical power sources. The PM3700-80 is a highly efficient device that provides effective control of signal quality over a wide range of frequencies and power levels.

The PM3700-80 Common Mode Choke works by minimizing the propagation of common mode noise emissions, as well as differential mode noise emissions. The device reduces electromagnetic induction, which is generated when signals are transferred between two or more powered devices. The PM3700-80 utilizes an inductor to attenuate the signals. This inductor is surrounded by a magnetic shield, increasing the effectiveness of the device.

The typical applications for the PM3700-80 include controlling power spikes, avoiding the transfer of ground loops and interference from other devices being used in close proximity to the protected device. The choke can also be used in systems where the power source is subject to external device electrical noise.

The working principle of the PM3700-80 is based on Faraday’s law of induction. When an electric field is generated by an alternating current passing through a conductor, it creates a magnetic field. When two conductors are close together, and one has a changing current, the changing electric field induces an emf in the second conductor. The resulting current creates a signal which can interfere with an electronic device. This is called electromagnetic induction.

The PM3700-80 includes two coils that are connected in series and wrapped around a ferromagnetic core to create an inductor. As a current passes through the coils, a magnetic field is formed and the ferromagnetic core reinforces it. This increases the inductance. The Faraday shield and the ferromagnetic core act as a filter, allowing only the desired frequencies to pass through and blocking all the unwanted frequencies.

The PM3700-80 is an excellent choice for reducing common mode noise in power supply applications. The device can be used in a vast array of electrical circuits and is designed to provide effective signal control and increased safety. The PM3700-80 works by using inductance and a Faraday shield to attenuate the frequency of the unwanted signals, resulting in cleaner power and improved signal quality.

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