Magnetic amplifier, low definition is made iron core with nonlinear characteristics of ferromagnetic materials, and make its magnetization for dc and ac current power transformation of electrical appliances.
Magnetic amplifier is mainly used for electrical automatic control system, such as motor speed regulation, regulating low core of magnetic amplifier can make precise control of switch power supply, and to improve its stability.
Can use permalloy magnetic amplifier core, ferrite or amorphous and nanocrystalline (
Also known as superfine crystal)
Low core advantages of amorphous and nanocrystalline soft magnetic material
s because of the high permeability, high temperature stability, high rectangle ratio and the ideal is applied to magnetic amplifier, the output can provide unparalleled accuracy, and can achieve higher work efficiency, and popularity.
Amorphous and nanocrystalline core in addition to the above characteristics also have the following advantages: 1)
Saturated permeability is low;
Low coercive force;
Small recovery current;
Low working characteristic current amplification coefficient = magnetic amplifier output/input current;
Power amplification coefficient = load power output/input control power.
Simple magnetic amplifier output current has nothing to do with the polarity of the input current.
Input control current is zero, the output current is not equal to zero, and lo a no-load current.
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