A20B-2101-0390 带噪声滤波器的电源板 印刷电路板

A20B-2101-0390 带噪声滤波器的电源板 印刷电路板

交流伺服电动机在结构上类似于单相异步电动机，它的定子铁芯中安放着空间相差90°电角度的两相绕组。一相称为励磁绕组，一相称为控制绕组。电动机工作时，励磁绕组接单相交流电压，控制绕组接控制信号电压，要求两相电压同频率。

交流伺服电动机的转子有两种结构形式。一种是笼型转子，与普通三相异步电动机笼型转子相似，只不过在外形上更细长，从而减小了转子的转动惯量，降低了电动机的机电时间常数。笼型转子交流伺服电动机体积较大，气隙小，所需的励磁电流小，功率因数较高，电动机的机械强度大，但快速响应性能稍差，低速运行也不够平稳。

另一种是非磁性空心杯形转子，其转子做成了杯形结构，为了减小气隙，在杯形转子内还有一个内定子，内定子上不设绕组，只起导磁作用，转子用铝或铝合金制成，杯壁厚0.2~0.8mm，转动惯量小且具有较大的电阻。空心杯型转子交流伺服电动机具有响应快、运行平稳的优点,但结构复杂,气隙大载电流大,功率因数较低。

A20B-2101-0390 带噪声滤波器的电源板 印刷电路板

The AC servo motor is similar in structure to a single-phase asynchronous motor, and its stator core is placed with a two-phase winding with a space difference of 90° electrical Angle. One is the field winding and the other is the control winding. When the motor is working, the excitation winding is connected to the single-phase AC voltage, and the control winding is connected to the control signal voltage, and the two phase voltages are required to be of the same frequency.

The rotor of AC servo motor has two structural forms. One is the cage rotor, which is similar to the cage rotor of the ordinary three-phase asynchronous motor, but it is more slender in shape, which reduces the moment of inertia of the rotor and reduces the electromechanical time constant of the motor. The cage-rotor AC servo motor is large, the air gap is small, the required excitation current is small, the power factor is high, the mechanical strength of the motor is large, but the fast response performance is slightly poor, and the low speed operation is not smooth enough.

The other is a non-magnetic hollow cup-shaped rotor, the rotor is made of a cup-shaped structure, in order to reduce the air gap, there is an internal stator in the cup-shaped rotor, the internal stator is not set on the winding, only plays a magnetic role, the rotor is made of aluminum or aluminum alloy, the cup wall thickness of 0.2~0.8mm, the moment of inertia is small and has a large resistance. Hollow cup rotor AC servo motor has the advantages of fast response and smooth operation, but it has complex structure, large air gap and large load current, and low power factor.