st7fmc2s7t6 STMicroelectronics, st7fmc2s7t6 Datasheet - Page 141
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st7fmc2s7t6
Manufacturer Part Number
st7fmc2s7t6
Description
8-bit Mcu With Nested Interrupts, Flash, 10-bit Adc, Brushless Motor Control, Five Timers, Spi, Linsci
Manufacturer
STMicroelectronics
Datasheet
1.ST7FMC2S7T6.pdf
(308 pages)
- Current page: 141 of 308
- Download datasheet (5Mb)
MOTOR CONTROLLER (Cont’d)
Figure 74. Example of Command Sequence for 6-step Mode (typical 3-phase PM BLDC Motor
Control)
Superimposed voltage
(BEMF induced by rotor)
- approx. HV/2 (PWM on)
- approx. 0V (PWM off)
Note: Control & sampling PWM influence is not represented on these simplified chronograms.
Switch
Node
Step
A
B
C
0
1
2
3
4
5
HV
HV/2
0
HV
HV/2
0
HV
HV/2
0
Demagnetization
1
1
HV
HV/2
0V
2
Wait for BEMF = 0
3
D
2
2
4
C
2
Commutation delay
5
Z
2
6
3
1
2
3
4
T0
T1
A
PWM off pulses
I
4
D
5
I
5
Z
5
5
I
1
C
T2
T3
4
B
ST7MC1/ST7MC2
HV
I
I
6
2
t
6
T4
I
T5
3
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C
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