【摘要】 针对基于CPU的脉宽调制控制的不足,给出一个基于FPGA的脉宽调制直流电机控制方案,提出FPGA电机控制电路和数字比较器的VHDL设计方法。计算机仿真和控制结果表明,该电路能有效地产生PWM控制信号控制电机的转速,且控制精度由FPGA中的数字比较器决定。更多还原

【Abstract】 To solve the shortages of pulse-width modulation(PWM) control by CPU,a control method of DC motor by PWM based on field programmable gate array(FPGA)is presented.The DC motor control circuit by FPGA and the design method of digital comparator with VHDL are introduced.The result of computer simulation and control experiment shows that the circuit can output PWM signals effectively to control rotation speed of DC motor.The control precision mainly depends on the digital comparator in FPGA.更多还原