A06B-6141-H006 #H580  交流伺服电机  以机械特性和调节特性为表征

A06B-6141-H006 #H580 交流伺服电机是一种将电能转换为机械能的电动设备。它由一个产生磁场的电磁铁绕组或分布的定子绕组和一个旋转电枢或转子组成。这种电机利用通电线圈在磁场中受力转动的现象来工作。交流伺服电机通常分为交流异步伺服电机和交流同步伺服电机。

A06B-6141-H006 #H580交流伺服电机的构造主要包括定子和转子两部分。定子的结构与旋转变压器的定子基本相同，在定子铁心中安放着空间互成90度电角度的两相绕组。其中一组为激磁绕组，另一组为控制绕组。交流伺服电机使用时，激磁绕组两端施加恒定的激磁电压Uf，控制绕组两端施加控制电压Uk。当定子绕组加上电压后，伺服电机很快就会转动起来。

A06B-6141-H006 #H580 交流伺服电机的工作特性是以机械特性和调节特性为表征。机械特性指的是在控制电压一定时，负载增加，转速下降；调节特性则是在负载一定时，控制电压越高，转速也越高。此外，交流伺服电机具有运行稳定、可控性好、响应快速、灵敏度高以及机械特性和调节特性的非线性度指标严格等特点。

A06B-6141-H006 #H580 伺服电机是自动控制装置中被用作执行元件的微特电机。其功能是将电信号转换成转轴的角位移或角速度，广泛应用于各种自动化设备和系统中。

交流异步伺服电机和交流同步伺服电机是两种不同类型的交流伺服电机。

交流异步伺服电机也称为感应伺服电机，其工作原理基于感应电动机的原理。转子由感应线圈和铁心材料构成，转动后，定子产生旋转磁场，磁场切割转子的感应线圈，转子线圈产生感应电流，进而转子产生感应磁场，感应磁场追随定子旋转磁场的变化，但转子的磁场变化永远小于定子磁场的变化。在交流异步电机的关键参数转差率表示转子与定子的速度差的比率。异步伺服电机负载时的转速与所接电网的频率之比不是恒定关系，有较高的运行效率和较好的工作特性，从空载到满载范围内接近恒速运行，能满足大多数工农业生产机械的传动要求。

交流同步伺服电机也称为永磁同步型交流伺服电动机。它的转子由永磁材料制成，转动后，随着定子旋转磁场的变化，转子也做相应频率的速度变化，而且转子速度等于定子速度，所以称“同步”。同步伺服电机需要外部的控制系统来保持转子速度与电磁场速度的同步。同步伺服电机的功率因数可以调节，最高转动速度低，且随着功率增大而快速降低，因而适合做低速平稳运行的应用。在不要求调速的场合，应用同步电动机可以提高运行效率。高性能的伺服系统大多采用永磁同步型交流伺服电动机。

A06B-6141-H006 #H580  交流伺服电机  以机械特性和调节特性为表征

A06B-6141-H006 #H580 AC servo motor is an electric device that converts electrical energy into mechanical energy. It consists of an electromagnet winding or distributed stator winding that generates a magnetic field and a rotating armature or rotor. This kind of motor works by using the phenomenon that an energized coil is forced to rotate in a magnetic field. Ac servo motors are usually divided into AC asynchronous servo motors and AC synchronous servo motors.

The structure of A06B-6141-H006 #H580 AC servo motor mainly includes two parts: stator and rotor. The structure of the stator is basically the same as that of the rotating transformer. In the stator core, there are two phase windings with a space of 90 degrees electrical Angle to each other. One group is the field winding and the other group is the control winding. When the AC servo motor is used, a constant excitation voltage Uf is applied to both ends of the excitation winding, and a control voltage Uk is applied to both ends of the control winding. When a voltage is applied to the stator winding, the servo motor will quickly turn.

The operating characteristics of A06B-6141-H006 #H580 AC servo motor are characterized by mechanical and regulatory characteristics. Mechanical characteristics refer to the increase of load and decrease of speed when the control voltage is fixed; The adjustment characteristic is that when the load is fixed, the higher the control voltage is, the higher the speed is. In addition, the AC servo motor has the characteristics of stable operation, good controllability, fast response, high sensitivity and strict nonlinearity index of mechanical characteristics and adjustment characteristics.

A06B-6141-H006 #H580 servo motor is a micro motor used as an executive element in automatic control devices. Its function is to convert the electrical signal into the angular displacement or angular speed of the rotating shaft, which is widely used in various automation equipment and systems.

Ac asynchronous servo motor and AC synchronous servo motor are two different types of AC servo motors.

Ac asynchronous servo motor is also known as induction servo motor, its working principle is based on the principle of induction motor. The rotor is composed of an induction coil and an iron core material. After rotation, the stator generates a rotating magnetic field, and the magnetic field cuts the induction coil of the rotor. The rotor coil generates an induced current, and then the rotor generates an induced magnetic field. The slip rate, a key parameter in AC asynchronous motors, represents the ratio of the speed difference between the rotor and the stator. The ratio between the speed of the asynchronous servo motor load and the frequency of the connected power grid is not a constant relationship, has higher operating efficiency and better working characteristics, and can run close to constant speed from no-load to full load range, which can meet the transmission requirements of most industrial and agricultural production machinery.

Ac synchronous servo motor is also known as permanent magnet synchronous AC servo motor. Its rotor is made of permanent magnet material, after rotation, with the stator rotating magnetic field changes, the rotor also changes the speed of the corresponding frequency, and the rotor speed is equal to the stator speed, so it is called "synchronous". Synchronous servo motors require an external control system to keep the rotor speed in sync with the electromagnetic field speed. The power factor of synchronous servo motor can be adjusted, the maximum rotation speed is low, and it decreases rapidly with the increase of power, so it is suitable for the application of low speed and smooth operation. When speed regulation is not required, the application of synchronous motor can improve the operation efficiency. The high performance servo system mostly uses permanent magnet synchronous AC servo motor.