Atmel 8-bit AVR Microcontrollers AVR430: MC300 Uživatelská příručka

AVR1607: Brushless DC Motor (BLDC) Control in Sensor mode using ATxmega128A1 and ATAVRMC323 Features • BLDC Motor Basics • Hardware Implementa

10 AVR1607 8311A-AVR-07/10 Table 1-4. ATAVRMC303 jumper settings Jumper Position Comment J15 Open Shunt_neg (Jumpers to be removed to enable JTAG P

AVR1607 118311A-AVR-07/10 4.6.2 Ground and Power Wirings One design its own board has to take care of the ground wiring and power wiring. The power

12 AVR1607 8311A-AVR-07/10 Figure 9. Main flow chart The tasks are scheduled thanks to the g_tick produced each 1.024ms with Timer1.

AVR1607 138311A-AVR-07/10 5.2 INIT : Initialisation functions The initialization functions are following 5.2.1 clock_init() • Oscillator : 32MHz RC

14 AVR1607 8311A-AVR-07/10 duty_cycle = mc_control_current(mc_get_potentiometer_value()) 5.4 Commutation The phase commutation has to be achieved ac

AVR1607 158311A-AVR-07/10 • and secondly, a switch of the power bridge according to next expected position and the direction of the rotation. AWE

16 AVR1607 8311A-AVR-07/10 Table 1-5. List of commands Command Action ru Run motorst Stop Motorhelp Gives helpfw Set direction to Forwardbw Set dir

AVR1607 178311A-AVR-07/10 7 USB communication Communication can be achieved from PC to USB connector of MC303 board. The AVR1014, MC303 Hardware U

8311A-AVR-07/10 Disclaimer Headquarters International Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131 USA Tel: 1(408) 441-0311 Fax: 1(

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Atmel: ATAVRMC323

2 AVR1607 8311A-AVR-07/10 2 Brushless DC motor Theory of Operation 2.1 Simplified Model of a BLDC Motor A simplified model of a three phases BLDC mot

AVR1607 38311A-AVR-07/10 Figure 2. Model of a BLDC Motor with current flows versus rotor positions Figure 3. Commutation sequence Notes : - Open p

4 AVR1607 8311A-AVR-07/10 2.4 Hall sensors For the estimation of the rotor position, the motor is equipped with three hall sensors. These hall senso

AVR1607 58311A-AVR-07/10 Reading hall sensors values (HS_xxx variable) indicates which new scheme should be switched.(see following table) Table 1-

6 AVR1607 8311A-AVR-07/10 motor. Then Phase U is unpowered and Phase W is connected to the positive DC bus, resulting in a new stator flux vector ‘St

AVR1607 78311A-AVR-07/10 o 8x4 differential inputs with selectable 1/2/4/8/16/32/64x gain • Four Analog Comparators with Window compare function,

8 AVR1607 8311A-AVR-07/10 4.1 Hardware implementation The block diagram of the sensor closed loop is following : Figure 8. System block diagram The

AVR1607 98311A-AVR-07/10 PA3 98 V_conditioned = V / 6 (Not used) PA4 99 W_conditioned = W / 6 (Not used) PA5 100 Vn_conditioned Neutral vol