+ Motor Control and Drive Design Solutions BLDC Fan Motor Control Need a highly integrated fan controller with a customizable speed/temperature profile? Take a look at Microchip’s PIC12HV and PIC16HV devices. These devices have a built-in 5V regulator and on-chip comparator to save system cost. The rotor position is determined by a hall-effect sensor connected to the on-chip comparator. The Enhanced Capture Compare PWM (ECCP) Module uses this feedback information to drive the motor by steering the PWM signal to the appropriate motor phase. Temperature sensor inputs can be used to create a unique fan speed profile and the application can provide digital status information to a host device. If space or time-to-market is a concern for your next project, Microchip’s 3-phase full-wave sensorless drivers for brushless DC (BLDC) motors are the answer. The devices feature 180° sinusoidal drive, high torque output and silent drive. With the adaptive features, parameters and wide range of power supplies, they work standalone or with Microchip’s broad range of microcontrollers. FG 12V DC PIC12HV615 Hall Sensor PROG VBIAS OUT1 OUT2 PWM DIR VDD OUT3 GND C1 C2 ECCP N S A B MTD6505 VDD Temperature PWM Command I2C™ Commutation & Speed 5V Reg Comp Brushless DC Motor Control BLDC Motor Control Looking for high reliability, high efficiency, and high power-to-size ratio motor? The obvious solution is a Brushless DC (BLDC) motor. It shares many of the same torque and speed characteristics with the brushed DC motor, but without the brushes. Technically it is a Permanent Magnet Synchronous Motor (PMSM), but its name comes from the simple method of commutation and in some cases the stator windings are constructed to match the non-sinusoidal commutation. The simpler commutation methods allows the use of a wide range of Microchip products, from 8-bit PIC16 MCUs to MTD650X dedicated BLDC driver chips to dsPIC® digital signal controllers. The device best suited to your application depends on what you are trying to achieve: performance, cost, efficiency, time to market, etc. Microchip has a wide range of application notes and development tools that allow you to get started with your application quickly. PIC® Microcontroller or Digital Signal Controller Gate Drivers Inverter VBUS Motor Mechanical Feedback – Op Amp – + VREF Comparator BLDC Application Notes and Tuning Guides Algorithm PIC16 Family PIC18 Family dsPIC® DSC Family Sensored AN857 AN885 AN899 AN957 Sensored Sinusoidal – – AN1017 Sensorless BEMF AN1175 AN1305 AN970 AN901 AN992 Algorithm App Note Sensorless Filtered BEMF with Majority Detect AN1160 Sensorless Dual-Shunt FOC with SMO Estimator and Field Weakening AN1078 Sensorless Dual-Shunt FOC with SMO and PFC AN1208 Sensorless Dual-Shunt FOC with PLL Estimator and Field Weakening AN1292 Sensorless Sing-Shunt FOC with SMO Estimator and Field Weakening AN1299 Tuning Guide: Sensorless BLDC Control with Back-EMF Filetering Using a Majority Function AN1160 BLDC Training Class Title Language Recording Date Duration Sensorless BLDC Motor Control Using a Majority Function English 04/29/2008 19 min.
EETE FEB 2014
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