Motor current digital control circuit and method based on bridge circuit

The invention discloses a motor current digital control circuit and method based on a bridge circuit. The structure of a digital control circuit composed of an ADC sampling chip, a DSP control chip, a digital PID chip, a timer and a digital comparator and the structure of a bridge topology circuit composed of an MOS transistor Q1, an MOS transistor Q2, a diode D1 and a diode D2 are simpler. And through a digital control method, high control precision and good dynamic response performance can be realized, so that the phenomena of magnetic saturation of the magnetic induction coil and violent oscillation of the current are effectively avoided, and the current control of the motor is quickly and accurately realized. 一种基于桥式电路的电机电流数字控制电路及方法，由ADC采样芯片、DSP控制芯片、数字PID芯片、定时器和数字比较器构成的数字控制电路，以及由MOS管Q1、MOS管Q2、二极管D1和二极管D2构成的桥式拓扑电路的结构更为精简；且通过数字控制的方法，能够做到控制精度高、动态响应性能好，从而有效避免磁感应线圈出现磁饱和，以及电流剧烈震荡现象的发生，进而快速精确地实现对电机电流控制。