Talking about AC Servo and Its Application
AC servo drives and frequency converters can be said to be a pair of brothers, are the driver of the AC motor, according to the order of availability, the frequency converter should be called his brother, AC servo is called his brother. The inverter drives the inverter motor and also drives the ordinary AC motor. The main function is to adjust the motor speed. AC servo drives drive AC servo motors, whose main features are precise and quick positioning tracking, and precise position control. Servo driver birth background Servo from the English word Servo, used to accurately follow or reproduce a certain process feedback control system called the servo system, also known as servo system. The servo system was originally used in ship's autopilot, artillery control, and command instruments. Later, it was gradually extended to many fields, especially automatic lathes, antenna position control, guided missiles, and spacecraft. The basic working principle of AC servo drive: The development trend of the servo system The application of digital AC servo system is more and more widely used, and users have higher and higher requirements for servo drive technology. In general, the development trend of the servo system can be summarized as the following aspects: 1. Integration At present, the output devices of servo control systems are increasingly adopting new power semiconductor devices with high switching frequencies. These devices provide input isolation, energy consumption braking, over-temperature, over-voltage, and over-current protection. Fault diagnosis and other functions are all integrated into one small module. With the same control unit, as long as the system parameters are set by software, the performance can be changed. It is possible to use sensors configured by the motor to form a semi-closed-loop adjustment system, and external external sensors such as position, speed, and torque sensors to form a high-precision system. Full closed-loop regulation system. The high degree of integration significantly reduces the size of the entire control system. 2. Intelligent Currently, most of the internal servo control cores use new high-speed microprocessors and dedicated digital signal processors (DSPs) to implement fully digital servo systems. Digitization of the servo system is a prerequisite for its realization of intelligence. The intelligence of the servo system is shown in the following aspects: All the operating parameters of the system can be set by the software through the way of human-machine dialogue; secondly, they all have fault self-diagnosis and analysis functions; and parameters self-tuning functions. As we all know, the parameter setting of the closed-loop regulation system is an important part of guaranteeing the system performance index, and it also needs more time and effort. The servo unit with self-tuning function can automatically set the parameters of the system through several trial runs and automatically realize its optimization. 3. The networking of networked servo systems is an inevitable trend in the development of integrated automation technology. It is a product of the combination of control technology, computer technology, and communication technology. Fieldbus is a kind of application to the production site, between field devices, on-site equipment, and Two-way, serial, and multi-node digital communication technologies are implemented between control devices. Fieldbus is now widely used in servo systems, servo systems and other peripheral devices such as human-machine interface HMI, programmable controller PLC and other information exchange transmission. Fieldbus has the following types of FF; ProfiBus, WorldFIP, ControlNet/DeviveNet, and CAN. These communication protocols all provide the possibility of multi-axis real-time synchronous control, and are also integrated by some high-end servo drivers, so that the servo system is distributed, open, interconnected, and highly reliable. 3. Simplification The "simplification" mentioned here is not simply but streamlined. It is based on the user's situation, and the user's use of the servo function is given and enhanced to make it specific and refined, and some functions that are not used are given a streamlining. Reduce the cost of the servo system, create more benefits for customers, and reduce the waste of resources to help the environment by streamlining some of the components. The term "easy" as used here means that the software programming and operation of the servo system is based on the user's perspective and is designed to be simple and easy, so that the user can set it simply by simply setting it. 9V Power Adapter,Dc 9V Power Adapter,Adapter Dc 9V,9V 8A Adapter ShenZhen Yinghuiyuan Electronics Co.,Ltd , https://www.yhypoweradapter.com
In the 1960s, servo control technology began to be used in DC speed control, through a number of discrete semiconductor components and its circuit board for closed-loop control of torque, speed, etc., by adjusting a number of adjustable resistance, capacitance, and inductance components To achieve the matching of parameters, the adjustment is more complex and the dynamic response is not ideal. In the 1980s, with the development of integrated circuits, power electronics and AC variable speed drive technologies, and the use of frequency conversion technology, the permanent magnet AC servo drive technology has made outstanding development, since Rexroth GmbH of Germany MANNESMANN. The Indramat Division officially launched the MAC permanent magnet AC servo motor and drive system at the Hannover Trade Fair in 1978, which signifies that this new generation of AC servo technology has entered the practical stage. Subsequently, well-known electrical companies in various countries have launched their own AC servo motor and servo drive products.
AC servo learns and applies the technology of frequency conversion. Based on the servo control of the DC motor, the frequency conversion PWM method is used to simulate the control method of the DC motor. In other words, the AC servo motor must have the frequency conversion. Like the inverter, the AC power is rectified into DC power, and then the inverter can be controlled by the various types of transistors (IGBT, IGCT, etc.) that can control the gate. Cosmic pulsating electricity.
The servo driver has developed frequency conversion technology. The current loop, speed loop, and position loop (without the loop in the inverter) of the servo drive perform more precise control techniques and algorithm operations than the conventional inverter. The main point is that accurate position control can be performed. .
The control part of the AC servo now uses a digital signal processor (DSP) as the control core. Its advantage is that it can implement more complex control algorithms to complete the closed-loop control of the servo system, including closed-loop control such as torque, speed, and position.
Wherever the position, speed and torque control requirements are relatively high, AC servo drive can be used. Such as machine tools, printing equipment, packaging equipment, textile equipment, laser processing equipment, robotics, electronics, pharmaceuticals, financial equipment, automated production lines. Because servo is used in positioning and speed control applications, servo is also called motion control.
1. Metallurgy, iron and steel—continuous casting and drawing production lines, copper rod up-lead continuous casting machines, jet marking equipment, tandem cold rolling mills, fixed-length shearing, automatic feeding, converter tilting, etc.
2. Power, cable-turbine governors, wind turbine pitch systems, wire drawing machines, stranding machines, high-speed weaving machines, coiling machines, jet marking equipment, etc.
3, petroleum, chemical - extrusion machine, film belt, large air compressor, pumping unit, etc.
4, chemical fiber and textile - spinning machine, spinning machine, loom, carding machine, cross-edge machine, etc.
5. Automobile manufacturing - engine parts production line, engine assembly production line, vehicle assembly line, body welding line, testing equipment, etc.
6, machine tool manufacturing - lathes, gantry, milling machines, grinding machines, machining centers, gear machines, etc.
7, casting manufacturing - robot, converter tilt, mold processing center, etc.
8, rubber and plastic manufacturing industry - plastic calendar machine, plastic film bag sealing machine, injection molding machine, extruder, molding machine, plastic composite machine, wire drawing machine, etc.
9, electronic manufacturing - printed circuit board (PCB) equipment, semiconductor device equipment (lithography, wafer processing machines, etc.), liquid crystal display (LCD) equipment, machine assembly and surface mount (SMT) equipment, laser Equipment (cutters, engraving machines, etc.), general-purpose numerical control equipment, robots, etc.
10, paper industry - paper conveying equipment, special paper making machinery, etc.
11, food manufacturing - raw material processing equipment, filling machinery, sealing machines, other food packaging and printing equipment, etc.
12. Pharmaceutical industry—raw material processing machinery, preparation machinery, decoction machinery, printing and packaging machinery, etc.
13, traffic - subway screen doors, electric locomotives, ship navigation, etc.
14, logistics, loading and unloading, handling - automatic warehouses, vans, three-dimensional garages, transmission belts, robots, lifting equipment and handling equipment, etc.
15. Buildings - elevators, conveyor belts, automatic revolving doors, automatic windows, etc.
16, medical - CT, X-ray machine, MRI, etc.
17, test equipment - automotive test equipment, torque test equipment, etc.