Digital AC - AC frequency conversion drive controller.pdfVIP

Digital AC - AC frequency conversion drive controller 1. The composition of the digital controller For vector control AC - AC variable frequency drive with digital controller functions are: Logic control, speed setting, vector control, the current regulation, alarm processing and test adjustment, etc. This is a free hardware configuration, software freedom to design a digital controller for rapid adjustment and control, mainly used for AC-DC converter drives, reactive power compensation, HVDC and energy management and other fields. The main hardware modules: processor module, communication with the memory module, I/O interface module, the communication interface module, a program storage module, the external device (programming, operating disk, printer, EPROM writer). The main software modules are: program design software, system software, debugging and maintenance software. System software includes the operating system and standard function block library. Function block library consists of more than 250 kinds of function blocks to realize algebra, logic operations, converter control, process adjustment, input and output functions. Hardware components: power supply, 16bit general purpose processor board, 16bit vector control processor board, converter processor board, mixed interface board, analog quantity output plate; Actual value processing board, the reference time generator board, signal integrated panels, the amount of transformation process plate. Software organizations see below: LOGIC: Logic control, operation, chain and protection NREG: Speed control, output component given value of the stator current torque MELD: Alarm processing, integration of fault signals for display and processing TVR: Vector control, the following section details IRA, IRB, IRC: Current regulation, given the three-phase inverter thyristor trigger pulse 2. Digital Vector Control The controller uses the vector control method of open-loop flux and