AN1905 ST Microelectronics, Inc., AN1905 Datasheet - Page 60

• Manufacturer Part Number: AN1905
• Description: St7mc Three-phase BLDC Motor Control Software Library
• Manufacturer: ST Microelectronics, Inc.

ST7MC THREE-PHASE BLDC MOTOR CONTROL SOFTWARE LIBRARY
Figure 42. Command sequence for 6-step mode
Figure 43. Voltage on phase B
60/77
direction
number
Current
Step
High
Low
.
Demagnetization
A to B
Σ
1
T0
T3
Σ
HV
HV/2
1
0V
Wait for BEMF = 0
A to C
T0
T5
Σ
2
D
Σ
2
2
B to C
C
T2
T5
Σ
2
Commutation delay
3
Step
Z
B to A
2
T2
T1
Σ
4
Σ
3
C to A
T4
T1
Σ
5
C to B
T4
T3
Σ
Σ
6
4
T0
T1
PWM off pulses
A
D
5
Σ
I
Z
5
4
5
C
4
I
5
I
1
T2
T3
B
Σ
t
6
HV
I
I
6
2
I
T4
T5
3
C