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ST72141K2 数据表(PDF) 42 Page - STMicroelectronics

部件名 ST72141K2
功能描述  8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
PDF  132 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST72141K2 数据表(HTML) 42 Page - STMicroelectronics

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ST72141K
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MOTOR CONTROLLER (Cont’d)
Figure 27. Example of Command Sequence for 6-step Mode (typical 3-phase PMDC Motor Control)
0
1
2
3
4
5
A
B
C
Node
Step
Σ
1
Σ
2
Σ
3
Σ
4
Σ
5
Σ
6
Σ
1
Σ
2
Σ
3
C
A
B
HV
T4
T1
T0
T3
T2
T5
I4
I1
I3
I6
I2
I5
HV
HV/2
0
HV
HV/2
0
HV
HV/2
0
Demagnetization
D2
Z2
C2
C4
D5 Z5
Σ
2
Σ
3
Σ
4
Σ
5
Commutation delay
Wait for BEMF = 0
HV
HV/2
0V
t
Note: Control & sampling PWM influence is not represented on these simplified chronograms.
Switch
Σ
1
Σ
6
PWM off pulses
(BEMF induced by rotor)
Superimposed voltage
- approx. HV/2 (PWM on)
- approx. 0V (PWM off)



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