Saturday, November 29, 2014

Brushless DC Motor Control Circuit Schematic using Microchip PIC16F877

Eltronicschool. - Here is the circuit schematic of Brushless DC Motor Control Circuit Schematic using Microchip PIC16F877 from Microchip. This application note discusses the steps of developing several controllers for brushless motors. We cover sensored, sensorless, open loop, and closed loop design. There is even a controller with independent voltage and speed controls so you can discover your motor’s characteristics empirically. 

Figure 1. Brushless DC Motor Driver

Figure 1. Microchip PIC16F877 Schematic

The code in this application note was developed with the Microchip PIC16F877 PICmicro® Microcontroller, in conjuction with the In-Circuit Debugger (ICD). This combination was chosen because the ICD is inexpensive, and code can be debugged in the prototype hardware without need for an extra programmer or emulator. As the design develops, we program the target device and exercise the code directly from the MPLAB® environment. 

The final code can then be ported to one of the smaller, less expensive, PICmicro microcontrollers. The porting takes minimal effort because the instruction set is identical for all PICmicro 14-bit core devices. It should also be noted that the code was bench tested and optimized for a Pittman N2311A011 brushless DC motor. Other motors were also tested to assure that the code was generally useful.

For more information please download the paper of Brushless DC Motor Control Made Easy here.

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