基于DSP2812的全数字交流伺服系统硬件设计

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In
thdustry, Servo system is most frequently and widely used. Moving parts for high perfonnance speed control. Trajectory control of machine tools are completed rely on a variety of servo system. In the field of numerical control technology, Servo perfonnance of
calculations, modem servo controllers are take a full digital hardware structure. The advantages are fast
response, good continuity and can perfonn complex calculations [1] [4] [5].
Human Interface CPLD
Application of computer.In recent decades, With new technological revolution, microelectronics and
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particularly the rapid progress of computer technology. The Servo technology has a rapid development. Its application
Hardware Design of Digital AC Servo System Based on DSP2812
Wen-lei YANG
Ting-biao JANG
School of Computer and Control Guilin University of Electronic Technology, Guilin 541004, China e-mail:yangwenlei521@
Key words: The motor of three-phase permanent magnet
II. HARDWARE STRUCTURE AC servo system consists of two parts of AC servo motor and servo controller. The perfonnance of controller is good or bad directly affects the servo motor running. This design uses TMS320F2812DSP chips and pennanent magnet synchronous servo motor. Figure 1 shows the control chart of motor that the central controller is TMS320F2812DSP. It consists of TMS320F2812DSP controller, IPM power drives and high-speed CPLD EPM3128ATC auxiliary controller chip of man-machine interface. System can be run online in real time DSP emulator which enhance the flexibility of the system.
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module FSAMIOSH60A.. The power module features are follows:
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Maximum current Voltage
600 V;
978-1-4244-6837-9/10/$26.00 ©2010 IEEE
337
III. POWER DRIVER CIRCUIT The control drive circuit main complete the power amplifier of PWM signal and drive the power inverter. This design uses SPWM technology and the power inverter SVPWM technology which can achieve the process of inverter. In order to drive the three-phase inverter bridge circuit, PWM signal generated by the DSP can power amplifier through the power-driven module. When choosing IPM, we need to consider the motor overload requirements and the module features. This design uses Mitsubishi's three-phase bridge inverter
Abstract-Modern servo technology is applied in a variety of technical fields. This paper gives the hardware design of fully digital AC servo system based on DSP. Including hardware circuit design of digital signal processing unit, Drive circuit, Main circuit, Expansion circuit, Current Loop, P osition loop and Speed loop. Digital signal processor using 150M high-speed chip of TI's TMS320F2812 DSP. We can using Mitsubishi's FSAMlOSH60A Model DC-AC inverter bridge to achieve inverter on main circuit power, using resistors computing devices to detect has the advantages of current and using optical encoders to detect P osition and velocity. This circuit fast response, strong stability of the system and has the higher safety factor.
the system is one of the factors to detennine the accuracy and production efficiency of CNC machine tool. AC servo system is composed of AC servo motor and servo controller. The perfonnance of the controller directly affects motor running, which largely detennines the perfonnance of the entire control system. For the lack of traditional analog control capability to complex
synchronous;TMS320F2812DSP; Digital AC Servo System
I.
INTRODUCTION
Servo technology is a branch of the automatic control system. It is developed by automatic control theory, Microelectronics Technology, Power Electronics, and
low power consumption; protection, overheat
over-current
protection; j) Bridge arm of the tube interlock
winding[I][3]. Shown in the left portion of Figure 3. The role of filter capacitor C4 which add in the DC bus is: As the rectifier voltage is a pulsating DC voltage, which must be filtered. It can be achieved through the filter capacitor. In addition there are the filter capacitor
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Figurc 3.
Power main circuit
We can make the 220v power that we have obtained