Development Of Host Computer Software For The Electrical Dynamometer System

In recent years,the electric vehicle industry has been developing rapidly.As the motor is the core part of the electric vehicle,its performance test and research on control algorithm is more and more important.Therefore,we build a test bench for AC dynamometer system,and this test bench includes an AC dynamometer,a variable frequency drive,a torque sensor,a motor tested,and a power analyzer.We choose the ACS800 series of ABB for the drive,and the PA6000 series of Guangzhou ZHIYUAN Electronics for the power analyzer.In motor tests,there are high voltage and high speed.So,it is very dangerous.And it is very complicated to operate the machine manually.So,it is of great significance to develop a host computer software for the electrical dynamometer system suitable for laboratory use.The topic is proposed against this background.In this paper,we choose PC as the upper computer.The PC needs to communicate with the drive and the power analyzer simultaneously.We use CANopen protocol to communicate with the drive.The RCAN-01 CANopen Adapter module is installed on the drive,and the PCI5010-P CANopen master station board is installed in the PCI slot of the PC.We use the PC as the master station and the drive as the slave station,so the PC can communicate with the drive.Before communication,it is very important to set the parameters correctly for the drive and the RCAN-01 adapter.We use Ethernet interface to communicate with the power analyzer and connect the PC and the power analyzer with a network cable of RJ45 jacks.The Standard Commands for Programmable Instruments(SCPI)is used.The software development environment is Microsoft Visual Studio 2008 MFC.On the communication with the drive and the power analyzer,we used the DLLs provided by the manufacturer,which greatly reduced our work.The software has the function of controlling the dynamometer,monitoring the torque,speed,bus voltage and bus current of the motor tested,failure warning and data storage etc.In data display,the CWGraph control of NI controls is used.It can display data of 9 channels simultaneously,and we can adjust the color,sensitivity and offset of the curves.In data storage,using the ODBC technology,we can access the Microsoft Access database.The interface of the software is friendly and the operation is simple.The software well meets the requirements of the application of the laboratory.