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发电机的输出电压取决于:
1) 转子磁场与定子线圈的相对运动速度
2) 磁场强度
3) 定子上线圈匝数
Generator output voltage depends on the following:
· Speed of relative motion between magnetic field and stator conductors
· Strength of magnetic field
· Number of series turns in the stator windings
The strength of the magnetic field is proportional to the current flowing through the field coils.
The speed of relative motion between the magnetic field and the stator windings depends on the rotational speed of the rotor (engine rpm).
Voltage can be adjusted by arranging the stator windings in coils and varying the number of turns, or times the windings are wound around the stator. More voltage can be induced by increasing the number of turns and less voltage is induced by using fewer turns.
基本原理
Internal Excitation (IE)
Permanent Magnet (PM)
防护等级Ingress Protection (IP)
This is protection both for persons in contact with moving parts and for the protection of machines against the harmful effects due to the collection of water and dust.
An IP designation is typically two digits, where the first digit is the level of protection from solid objects and the second digit is the level of protection from water.
IP23. The first digit, 2, indicates the machine is protected against solid objects
greater than 12 mm. The second digit, 3, indicates protection from spraying water.