电机学电机学电机学 (29).ppt
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1、Electrical MachineryArmature Reaction of Synchronous GeneratorArmature reaction when=0Armature reaction:influence of armature reaction Fa on exciting MMF Ff when the synchronous generator takes symmetrical loads.Nature of armature reaction:direct-axis demagnetizing armature reaction,direct-axis magn
2、etization-strengthening armature reaction and quadrature-axis armature reaction.Nature of armature reaction depends on internal power-factor angle,that is,the included angle between no-load EMF E0 and stator current I;Armature MMF Fa lags exciting MMF Ff by the constant spacial included angle,that i
3、s,the electrical angle 90+.6.2.1 Concept of armature reaction of synchronous generator6.2.2 Armature reaction when=0Armature reaction when=0Quadrature-axis armature reactionElectromagnetic torque of braking nature is generated on rotorEffect:the transformation between mechanical energy and electricity energy is realized,and capacitive reactive power is also output.d axisq axis6.2.2 Armature reaction when=0THANKS FOR WATCHING!
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