济南永测生产的拉力试验机所使用的马达AC伺服控制马达，它的寿命在正常使用情况下是可以使用15年。

Constant, grand production of motor AC servo motor used by tensile testing machine, its life is under normal use can use 15 years.

AC伺服控制马达的优点是：低噪音、低振动、外观精致、安装容易、品质保证，通过ISO9001的标准要求。

The advantage of AC servo motor is: low noise, low vibration, delicate appearance, easy installation, quality assurance, ISO9001 standard requirements.

AC伺服控制马达的原理是检测出随着旋转而时刻变化的旋转位置，向线圈各相通入与磁极对应的电流。

The principle of AC servo motor is detected with the rotation of the rotation and time change position, all interlinked and the pole corresponding to the coil current.

由于磁极随旋转改变，流入的电流也发生变化，因此从结果上来看流入各相的电流为交流性的电流，大概就是这个原因而称其为AC伺服电机。

Because of the magnetic pole change with rotation, the inflow of current also produces change, therefore on the results of it into every phase current of AC current, probably it is for this reason and called it a AC servo motor.

但是向该电机直接施加交流电压并不能使其旋转。DC伺服电机为保持持续旋转需要切换电流方向的电刷，而AC伺服电机则不需要。

But applying voltage to the motor directly does not make it rotate. The DC servo motor to keep the continuous rotation need to switch the current direction of the brush, and AC servo motor is not required.