Universal Motor Drive with PIC16 Microcontrollers

Application note presents the design of an open-loop speed control TRIAC-driven universal motor driver board using a variety of core independent peripherals on an 8-bit microcontroller. The complete source code and reference design material are included. The universal motor used in this application note runs from 120V-240V AC power and is driven from a TRIAC. A bench test for running a 220V universal motor has been done. The circuit is powered off the line from an non-isolated AC supply, therefore, safety precautions should be taken when working with this type of system. An isolated on-board UART connection is available for debugging on a live circuit. The low-cost design and its type of motor are suitable for high-torque motor applications commonly used in blenders, food processors, drills and other home appliances