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)： 28/37頁(yè)
文件大?。?/td> 573K
代理商： L8150
Precharge and hall effects filtering time description
L8150
28/37
for the successive TelMAX/6 and the behaviour is the one described in the startup sequence
with motor stopped.
6.2
Startup sequence with SD signal
●
Let's consider a startup sequence forced by SD, supposing the motor stopped:
Figure 18.
Startup sequence forced by SD, supposing the motor stopped
When the SD signal has a falling edge (corresponding to a VREG signal that's crossing the
lower voltage protection), the logic can produce a ZC signal, depending on FS signal
behaviour induced by Vsp voltage value. In any case, even if no ZC signal is produced, if the
motor is stopped and no Hall effect commutation is detected, the counter reaches its
saturation time TelMAX/6 and the system evolves like in the situation described in previous
startup sequence with motor stopped.
Let's consider a startup sequence forced by SD, supposing the motor rotating quickly in
the direction imposed by the FR signal:
●
Figure 19.
Startup sequence forced by SD, supposing the motor rotating quickly in
the direction imposed by the FR signal
SD
PRECHARGE
ZC
HALL BUS
FILTER
TIME
PHASES
PHASES EXCITED
400 us
400 us
400 us
T
zc/576
T
zc
Tel
U
TelMax/6
MOTOR ACCELERATING
400 us
400 us
SD
ZC
HALL BUS
FILTER TIME
PHASES
PHASES EXCITED
T
zc/576
Tel
400 us
T
zc/576
T
zc/576
T
zc/576
T
zc
400 us
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