參數(shù)資料
型號: ST72141K2B3/XXX
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
封裝: 0.400 INCH, PLASTIC, SDIP-32
文件頁數(shù): 71/133頁
文件大小: 2615K
代理商: ST72141K2B3/XXX
Obsolete
Product(s)
- Obsolete
Product(s)
ST72141K2
42/133
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
Σ1
Σ2
Σ3
Σ4
Σ5
Σ6
Σ1
Σ2
Σ3
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
Σ2
Σ3
Σ4
Σ5
Commutation delay
Wait for BEMF = 0
HV
HV/2
0V
t
Note: Control & sampling PWM influence is not represented on these simplified chronograms.
Switch
Σ1
Σ6
PWM off pulses
(BEMF induced by rotor)
Superimposed voltage
- approx. HV/2 (PWM on)
- approx. 0V (PWM off)
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