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(dòng)機(jī)控制傳感器反電動(dòng)勢過零檢測ADC的使用56F805
文件頁數(shù): 46/66頁
文件大小: 1157K
代理商: DRM026
Software Design
Designer Reference Manual
DRM020 — Rev 0
46
Software Design
MOTOROLA
4.4.4 PI_CONST Timeout Routine
This routine is accessed from the main software timer in PI_CONST
rate. The rate defines the time constant of the PI controller. The following
sequence is performed (see
Figure 4-6
):
During deceleration, the DC-Bus voltage is checked and in case
of deceleration over-voltage, the deceleration is interrupted until
the capacitor is discharged,
When no deceleration over-voltage is measured, the
acceleration/deceleration speed profile is calculated,
Actual motor speed is calculated,
PI speed controller is performed and the corrected motor
frequency calculated,
The corresponding voltage amplitude is calculated according to
the Volt-per-Hertz ramp. Thus both parameters for PWM
generation are available (
Table_inc, Amplitude
).
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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DRM027 3-Phase Sensorless BLDC Motor Control with Back-EMF Zero Crossing Detection Using 56F805
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