基于FPGA及DDS技术的USM测试电源的设计  

Design of USM Test Power Supply Based on FPGA and DDS Technologies

作　　者：孙振华[1] 

机构地区：[1]西安航空技术高等专科学校,陕西西安710077

出　　处：《现代电子技术》2010年第14期199-201,共3页Modern Electronics Technique

摘　　要：超声波电机的运转需要一个两相相差90°(或可调)的高频交流信号源。本方案采用DDS技术的设计思路,用VHDL硬件描述语言对FPGA器件编程产生了两相四路高频信号。该信号经过驱动隔离电路施加于H桥逆变器中,在电感的平滑作用下,生成了满足USM测试要求的可调频、调相、调幅的两相高频交流信号源,成功地对USM45电机进行了驱动测试。该电路可用于研究超声波电机的运行状态的研究及获取其最佳工作点参数。The operation of ultrasonic motors requires a high-frequency AC signal source with 90° （or adjustable） phase difference between two phases. The scheme adopts DDS technology, VHDL hardware description language and programming FPGA to produce a two-phase and four-way high-frequency signal which is imposed on the H bridge inverter through the drive and isolation circuit to generate the two-phase high frequency AC signal source signal which can meet USM＇s test requirements of frequency modulation, phase modulation, amplitude modulation under the smoothing effect of inductor. The driving testing of USM-USM45 was carried out successfully. This circuit can be used to study the USM＇s running status and obtain its opti mum operating point parameters. Four-way high frequency signals plus can be easily applied to stepper motors and DC motor drive by imposing L298N-type drive chips. It can be applied to the frequency modulation and speed control of stepper motors by FM, and speed control of DC motors by PWM.

关 键 词：超声波电机 现场可编程门阵列 VHDL语言 直接数字频率合成 

分 类 号：TP98[自动化与计算机技术] TM359.9[电气工程—电机]