App Notes and Source Code for Brushless DC Motor Control



App Notes and Source Code for Brushless DC Motor Control

|The app notes on this page are written for brushless motors that are commutated with ‘six-step’ control. This control technique is|

|also called ‘120 degree conduction’ or ‘trapezoidal control’. |

| |

|If you are interested in brushless motors that are driven with sinusoidal currents, please see these links: |

| |

|Permanent Magnet Synchronous Motor Overview |

| |

|Recommended App Notes for Permanent Magnet Synchronous Motors |

| |

|Getting Started |

| | |

|AN885 |Brushless DC Motor Fundamentals |

| |If you are not familiar with how a brushless DC motor works, this is a good place to start. |

| | |

|AN857 |Brushless DC Motor Control Made Easy   |

| |This application note provides a good overview of brushless DC motor characteristics and presents |

| |software solutions for the PIC16Fxxx family of devices. |

| | |

| | |

|Low Cost BLDC Control Solutions |

| | |

|AN1175 |Sensorless Brushless DC Motor Control with PIC16 |

| |This application note presents a software solution that can be implemented using a low-cost 8-bit |

| |microcontroller. The software provides sensorless motor commutation and open-loop speed control. |

| | |

|AN899 |Brushless DC Motor Control Using PIC18FXX31 |

| |This application note provides a basic solution for driving a BLDC motor with 3 hall sensors. |

| | |

|AN970 |Using the PIC18F2431 for Sensorless BLDC Motor Control |

| |This application note describes a sensorless BLDC application using the BEMF detection method. |

| | |

| | |

|Advanced BLDC Control Solutions |

| | |

|AN957 |Sensored BLDC Motor Control Using dsPIC30F2010 |

| |This application note describes a BLDC application using hall effect sensors for motor position feedback.|

| |The application source code is written in C and optimized for the dsPIC30F2010 and other 28-pin dsPIC |

| |variants. |

| | |

|AN901 |Using the dsPIC30F for Sensorless BLDC Control |

| |This application note describes a sensorless BLDC control application using the BEMF detection method. |

| |The dsPIC ADC is used to detect the BEMF voltage. The source code has parameters to adjust the open loop|

| |startup sequence and also the closed loop operation of the motor. A GUI is available in the MPLAB IDE to|

| |help set the parameters. See GS005 for more information about the GUI. |

| |The AN901 application is written in C language for a dsPIC30F6010 or a dsPIC30F6010A device. |

| | |

| |Sensorless BLDC Code for 28-Pin dsPIC30F Devices |

| |For a version of this same application that is optimized for the 28-pin dsPIC30F2010 device, see AN992. |

| |This code would also work well with other 28-pin and 40-pin dsPIC30F motor control device variants. |

| | |

|AN1160 |Sensorless BLDC Control with Back-EMF Filtering Using a Majority Function |

| |This application note describes a sensorless BLDC motor control algorithm, implemented using the dsPIC® |

| |Digital Signal Controller (DSC). The algorithm works by the use of a majority function for digitally |

| |filtering the back-Electromotive Force (BEMF). Each phase of the motor is filtered to determine when to |

| |commutate the motor drive voltages. This control technique excludes the need for discrete, low-pass |

| |filtering hardware and off-chip comparators. |

| | |

|AN1106 |Power Factor Correction in Power Conversion Applications Using the dsPIC® DSC |

| |Active power factor correction is often used in electronic motor control applications to improve |

| |conversion efficiency. This application note describes a software solution that is designed to operate |

| |on Microchip’s motor control development system (P/N DM300021). |

| | |

|The app notes on this | |

|page are written for | |

|brushless motors that are| |

|commutated with | |

|‘six-step’ control. This| |

|control technique is also| |

|called ‘120 degree | |

|conduction’ or | |

|‘trapezoidal control’. | |

| | |

|If you are interested in | |

|brushless motors that are| |

|driven with sinusoidal | |

|currents, please see | |

|these links: | |

| | |

|Permanent Magnet | |

|Synchronous Motor | |

|Overview | |

| | |

|Recommended App Notes for| |

|Permanent Magnet | |

|Synchronous Motors | |

| | |

| | |

| | |

| |

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