參數(shù)資料
型號(hào)： L8150
廠商： 意法半導(dǎo)體
英文描述： Brushless motor predriver
中文描述： 無(wú)刷電機(jī)預(yù)驅(qū)動(dòng)
文件頁(yè)數(shù)： 19/37頁(yè)
文件大?。?/td> 573K
代理商： L8150
L8150
Operating description
19/37
In case of
reverse
rotation
(CCW)
, Smooth Drive applies the voltage profiles represented in
the following pictures (
Figure 8
).
Figure 8.
Smooth Drive Pattern (Reverse)
In case sinusoidal mode cannot be applied, a rectangular pattern will be applied, that is
driving one phase fixed to GND, one phase in tri-state while the other is switching from low
to high with a duty cycle depending on the ADC conversion , max. duty cycle about 95%,
according to the following diagram:
Figure 9.
Rectangular drive pattern (forward)
The diagram (
Figure 9
) is showing the applied driving pattern in case of applied torque in
forward
(continuous blue line) direction, while in case of
reverse
(continuous red line)
direction, the applied pattern can be found in the following picture (
Figure 10
); in both
pictures the meaning of the pattern line is the following: when the line is low, the
correspondent winding is driven continuously low; when the line is high, the winding is
driven with a duty cycle defined from the ADC conversion at a frequency 512 times slower
than the clock. On the other hand, when the line is at middle height the correspondent
phase will be left tri-stated.
HallU
OutU
OutV
OutW
Phase shift
HallU
HallV
HallW
OutU
OutV
OutW
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