MKD 系列 MKD112B-058-KG0-BN 力士乐伺服电机

　　对于在雷达上经常使用的直流伺服系统的驱动电动机功率放大部分，当天线重量轻，转速慢，驱动功率较小时，一般为几十瓦，可以直接用直流电源控制电动机。当驱动功率要求在近千瓦或千瓦以上时，选择驱动方案，也即放大直流电动机的电枢电流，就是设计伺服系统的重要部分。大功率直流电源目前采用较多的有:晶体管功放、晶闸管功放和电机放大机等等。对于千瓦级的晶体管功放使用的较少。可控硅技术在上世纪60～70年代初得到快速的发展和广泛的应用，但因当时的各方面原因，如可靠性等，不少产品放弃了可控硅控制。目前的集成驱动模块一般都为晶体管或晶闸管制造。电机放大机是传统的直流伺服电机的功放装置，因其控制简单，结实耐用，目前的新型号的雷达产品上仍有采用。下面主要以放大电机为例，和交流伺服电机比较其优缺点。

　　放大电机常称为扩大机，一般是用交流异步感应电动机拖动串联的两级直流发电机组，以此来实现直流控制。两组控制绕组，每组的输入阻抗为几千欧，若串接使用输入阻抗约10千欧，伺服电机一般为互补平衡对称输入，当系统输入不为零时打破其平衡，使放大电机有输出信号。当输入电流为十几到几十毫安时其输出可达100v以上的直流电压和几安到几十安的电流，直接接到直流伺服电机的电枢绕组上。其主要缺点是体积重量大，非线性度，尤其在零点附近不是很好，这对于要求高的系统需要仔细处理。

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　　主营：世界品牌的PLC 、DCS 系统备件 模块

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　　②Schneider(施耐德电气)系列产品》

　　③General electric(通用电气)系列产品》

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　　⑤SIEMENS(西门子系列产品)》

　　⑥销售ABB Robots. FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、Panasonic Robots、MOTOMAN Robots。

　　⑦estinghouse(西屋)： OVATION系统、WDPF系统、MAX1000系统备件。

　　⑧Invensys Foxboro(福克斯波罗)：I/A Series系统，FBM(现场输入/输出模块)顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数据通信及处理等。Invensys Triconex: 冗余容错控制系统、基于三重模件冗余(TMR)结构的现代化的容错控制器。

　　⑨Siemens(西门子)：Siemens MOORE， Siemens Simatic C1，Siemens数控系统等。

　　⑩Bosch Rexroth(博世力士乐)：Indramat，I/O模块,PLC控制器,驱动模块等。

　　◆Motorola(摩托)：MVME 162、MVME 167、MVME1772、MVME177等系列。

　　PLC模块，可编程控制器，CPU模块，IO模块，DO模块，AI模块，DI模块，网通信模块，

　　以太网模块，运动控制模块，模拟量输入模块，模拟量输出模块，数字输入模块，数字输出

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　　For the power amplification part of the driving motor of the DC servo system often used in radar, when the antenna is light, the speed is slow, and the driving power is small, usually tens of watts, the DC power supply can be directly used to control the motor. When the driving power is required to be nearly kW or more, choosing the driving scheme, that is, amplifying the armature current of DC motor, is an important part of designing servo system. At present, many high-power DC power supplies are used: transistor power amplifier, thyristor power amplifier, motor amplifier and so on. For kilowatt class transistors, power amplifiers are rarely used. Thyristor technology has been rapidly developed and widely used from the 1960s to the early 1970s. However, due to various reasons at that time, such as reliability, many products gave up thyristor control. At present, integrated drive modules are generally made of transistors or thyristors. Motor amplifier is the power amplifier of traditional DC servo motor. Because of its simple control and durability, it is still used in new radar products. The following mainly takes the amplification motor as an example to compare its advantages and disadvantages with the AC servo motor.

　　The amplifying motor is often called the expander. Generally, the AC asynchronous induction motor is used to drive the two-stage DC generator set in series to realize DC control. For two groups of control windings, the input impedance of each group is thousands of Ω. If the input impedance is about 10kΩ in series connection, the servo motor is generally complementary, balanced and symmetrical input. When the system input is not zero, its balance is broken, so that the amplified motor has output signal. When the input current is more than ten to tens of milliamps, its output can reach DC voltage of more than 100V and current of several to tens of AMPS, which are directly connected to the armature winding of DC servo motor. Its main disadvantages are large volume, weight and nonlinearity, especially near the zero point, which needs to be handled carefully for the system with high requirements.