伺服电机应用原理

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伺服电机应用原理 [复制链接]

Servomotors are available as AC or DC motors. Early servomotors were generally DC motors because
the only type of control for large currents was through SCRs for many years. As transistors became
capable of controlling larger currents and switching the large currents at higher frequencies, the AC
servomotor became used more often. Early servomotors were specifically designed for servo
amplifiers. Today a class of motors is designed for applica-tions that may use a servo amplifier or a
variable-frequency controller, which means that a motor may be used in a servo system in one
application, and used in a variable-frequency drive in another application. Some companies also call
any closed-loop system that does not use a stepper motor a servo system, so it is possible for a simple
AC induction motor that is connected to a velocity controller to be called a servomotor.