Motor Parameter Identification And Real-time Data Collection System

Due to the rapid development of rare-earth permanent magnetic materials, permanent magnet synchronous motor (PMSM) have rapid diffusion and application. Compared with the DC motor, permanent magnet synchronous motor without mechanical commutator and brushes, high reliability, no spark; compared with the induction motor, its rotor without excitation, high efficiency, low-speed performance, simple control, small size, light weight, moment of inertia is small, control performance is good, so is widely used in the context of small and medium-power high-performance motion control field, the electrical parameters of the motor control is critical, so this paper design the motor parameters identification and real-time data acquisition system。First, this paper describes the motor parameters identification research background, and then introduced a mathematical model of electrical and structural features. Also introduced a number of motor parameters identification methods are now commonly used, mainly frequency response method, Kalman filtering, model reference adaptive method, least-squares method and polishing set method. And based on the mathematical model of motor we summarize the motor stator resistance, d-axis inductance and q-axis inductance measurement method used in this article.Based on the above method of measuring inductive argument, we designed the motor parameter identification and real-time data acquisition system hardware system. The main control system STM32F103 microcontroller chip. STM32 family of 32-bit Flash microcontroller from ARM's groundbreaking Cortex-M3 core, which is designed to meet the set of high-performance, low power, real-time applications, competitive pricing in one of the embedded area requirements. Use it to design this system can not only shorten the development cycle, but also can reduce development costs, reduce the volume of products.STM32F103VB series of microcontrollers ARM32-bit Cortex-M3 CPU.72MHz, 90DMips. From 32K bytes to 128K bytes of Flash program memory, 6K bytes to 20K bytes of SRAM. With Flash, USB, CAN, 7 timers, 2 ADC, 9 communications interfaces, rich enhancements to I / O ports and connected to two APB bus peripherals. Including two 12-bit was ADC, 3 general-purpose 16-bit timers and a PWM timer, including standard and advanced communication interfaces: two I2C and SPI, 3 Ge USART, a USB and a CAN. Low-power, supply voltage of 2.0V to 3.6V, 3 power-saving modes, and with automatic wake-up feature. Nested interrupt controller, super multi-vector interrupt handling, 43 maskable interrupt channels, a very short interrupt response latency, only six CPU cycles, and with the rear link function.On the software side we use the IAR Systems, IAR Embedded Workbench for ARM v4.41A to development, IAR EWARM is the best compiler SCM Series is the leading electronic programming simulation tools, a set of embedded development environment, including editing, compiling , connection, debugging software. The structural design of the software module uses the hardware configuration and software flow control the phase separation model, can improve the reused of code, saving software development time. The hardware configuration module mainly to initialize the MCU function , there are GPIO port, ADC, timers, I2C, USART, USB, module configuration. Software flow control is through the software control for each parameter measured, computing, storage, and communications. Upper machine part is use the VC + + software to achieve, notably to complete the parameter display and process through the host computer to control the whole system.Finally, the paper summarizes the work we do in the paper , made the system deficiencies and further work to improve the system.