Xijiao 21 autumn "motor and drive" online homework answer sheet (I) [standard answer]

Xi'an Jiaotong 《 Motor and drive 》FAQ（ One ）
The first chapter is introduction
One 、 Briefly describe the basic points of the magnetic circuit
magnetic circuit : It is a closed loop through which magnetic lines of force pass .
Magnetomotive force ： The sum of the currents linked to the magnetic circuit .
Magnetic flux ： The number of magnetic lines of force passing through the magnetic circuit section .
Main magnetic circuit ： An important magnetic circuit composed of ferromagnetic materials with high magnetic conductivity .
Magnetic leakage circuit ： A magnetic circuit that is closed along the nonferromagnetic material next to the main magnetic circuit .
Main flux ： Magnetic flux passing through the main magnetic circuit . It is an important medium for motor or transformer to stop energy conversion .
Magnetic flux leakage ： Magnetic flux through magnetic leakage circuit . Do not participate in energy conversion .
Two 、 Describe the basic laws of magnetic circuit
Kirchhoff's law ： The sum of the magnetic voltage drop in each section of the magnetic circuit is equal to the total magnetomotive force .
The magnetic circuit may be analyzed in sections , The magnetomotive force consumed on each road section is called the magnetic voltage drop .
Ohm's law ： The magnetic depressurization on each segment is equal to the magnetoresistance times the magnetic flux . Aopeng Xijiao