'Put what you have learned' [car cooling fan] basic working principle!
'Put what you have learned' [car cooling fan] basic working principle!
u003cbru003e The basic working principle of automobile cooling fan is to use DC motor and AC motor type motors in different ways. Using a computer as a DC fan motor, the power supply voltage is +12 V, and the speed ranges from 1000 to 10000 rpm.
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u003cbru003e Rotating machinery that converts DC electrical energy into mechanical energy. It consists of a three-part stator, rotor and commutator,
u003cbru003eThere are more than two rotor coils, and the magnets wound by wires are called windings. When the current passes through the windings, the magnetic field generates the force generated by the magnetic field and the stator magnetic field. Since the stator is fixed, the force of the rotation of the rotor.
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u003cbru003e The DC motor of the commutator is a special device in which there are multiple commutator segments, and every two adjacent commutator segments are insulating intermediate pieces. The commutator fixes the surface of the spring-loaded brush, and the rotatable armature winding is connected to an external circuit. When the rotor rotates a certain angle, the commutator, connected with the power supply voltage to another winding, the winding generates a magnetic field. As you can see, due to the presence of the commutator, the armature coil through the electromagnetic torque remains unchanged. Under the action of the electromagnetic torque of the armature, the bearing between the bearing housing of the liquid rotor is rotated and the dynamic cooperation structure is used. . The fan blades are fixed to the rotor so that when the rotor rotates, the fan will rotate with the rotor. Ordinary fans generally use ball bearings, high duan fans run to improve the stability of the system and increase the service life, usually more advanced liquid bearings.
u003cbru003e The schematic diagram of a car cooling fan is a brushless DC motor to achieve commutation. Because of the friction brush, the brush can even shorten the service life of the motor. At the same time, the brushes processed at high speed will generate sparks, and also interfere with the electronic circuits around. For this reason, people invented a brushless DC motor, usually called a brushless motor (brushless motor).
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u003cbru003eRecommendation: AC fan 220v-230v http:///products-detail.asp?cpidu003d74
