此源码是一个电控调音，变速变调的磁带机方案，MCU接口芯片采用PT2259，CD6651-this source is an electric control tuning, variable speed drives long-term downturns in the program, MCU interface chip used PT2259, CD6651

使用V/F原理的交流电机控制和简单的PWM算法 交流电机在连接到电源时只能以其额定速度运转，所以要改变转速必须改变电源频率。本篇应用文档展示了这些技术如何在AT90PWM3上简单的被实现，也说明了AVR RISC微处理器在电源控制方面的应用。-Induction motors can only run at their rated speed when they are connected to the main power supply. This is the reason why va

The rapid adoption of automation techniques in dustry has increased the requirement for better process control. This has resulted in many new applications for AC variable speed drives (VSDs) to control the speed and torque of driven machinery.

Direct torque control is one method used in variable frequency drives to control the torque (and thus finally the speed) of three-phase AC electric motors. This involves a calculation of the motor s magnetic flux and torque based on the measured