參數(shù)資料
型號: DRM026
英文描述: 3-Phase BLDC Motor Control with Sensorless BACK-EMF ADC Zero Crossing Detection Using 56F805
中文描述: 三相無刷直流電動機(jī)控制傳感器反電動勢過零檢測ADC的使用56F805
文件頁數(shù): 39/66頁
文件大?。?/td> 1157K
代理商: DRM026
Software Design
Data Flow
DRM020 — Rev 0
Designer Reference Manual
MOTOROLA
Software Design
39
The process can be described by following points:
Phase A
1.
Wave pointer for phase A is updated by the Table Increment
2.
Based on the wave pointer of the phase the required wave
quadrant is selected
3.
The quadrant pointer is calculated from the wave pointer with
respect to the related quadrant
4.
Table value determined by quadrant pointer is fetched from the
wave table
5.
The table value is added to (or substracted from) the 50% modulus
with respect to the related quadrant
6.
The result is loaded to the PVAL1 register; PVAL2 register is
loaded automatically because of complementary PWM mode
selected during the PWM module initialisation
Phase B
1.
The phase B wave pointer is calculated as phase A wave pointer
+ 1/3 of wave period (1/3 of
0xffff
equals to
0x5555
)
2.
See corresponding points 2.-5. of the Phase A calculation
3.
The result is loaded to the PVAL3 register; PVAL4 register is
loaded automatically because of complementary PWM mode
Phase C
1.
The phase C wave pointer is calculated as phase A wave pointer
+ 2/3 of wave period (2/3 of
0xffff
equals to
0xaaaa
)
2.
See corresponding points 2.-5. of the Phase A calculation
3.
The result is loaded to the PVAL5 register; PVAL6 register is
loaded automatically because of complementary PWM mode
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
相關(guān)PDF資料
PDF描述
DRM027 3-Phase Sensorless BLDC Motor Control with Back-EMF Zero Crossing Detection Using 56F805
DRM028 Sensorless BLDC Motor Control Using the MC68HC908MR32
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