ATA6834-DK Atmel, ATA6834-DK Datasheet - Page 5

• Manufacturer Part Number: ATA6834-DK
• Description: BOARD BLDC MOTOR CTRL ATA6833/34
• Manufacturer: Atmel
• Type: MOSFET & Power Driverr

Specifications of ATA6834-DK

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATA6833 / ATA6834, ATmega32M1
• Primary Attributes: 3-Ph BLDC, IC with FET Driver, LIN Transceiver, Volt Regulator, Watchdog
• Secondary Attributes: LCD with Touch Screen on MCU Controller Board
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 3-3.
9143C–AUTO–03/10
011
001
C
C
Commutation Steps for CW Operation
Step 1
Step 4
010
101
A
A
Reading the hall sensors values indicates the commutation to be performed. For multiple pole
motors, electrical rotation corresponds to mechanical rotation with the pair pole number factor.
Table 3-1.
Commutations are updated at each step to create a rotating magnetic field as shown in
3-3.
This method takes full advantage of the ATA6833/ATA6834 in combination with the
ATmega32M1 as commutations can be transmitted at each step, while PWM allow magnetic
field magnitude tuning independently to act on motor torque and speed.
BLDC Motor Control Kit with ATA6833/ATA6834
Hall Sensors
Value (CBA)
B
B
110
100
101
001
011
010
110
100
Switches Commutation for CW and CCW Rotation
C
C
Switches Commutation for CW
Coils
A - C
B - C
C - A
C - B
A - B
B - A
Step 5
Step 2
A
A
Rotation
B
B
Switches
H1 - L2
H1 - L3
H2 - L3
H2 - L1
H3 - L1
H3 - L2
C
C
Switches commutation for CCW
Coils
B - A
C - A
C - B
A - B
A - C
B - C
Step 3
Step 6
A
A
rotation
B
B
Switches
H2 - L1
H3 - L1
H3 - L2
H1 - L2
H1 - L3
H2 - L3
Figure
5