參數(shù)資料
型號(hào)： E-L8150TR
廠商： STMICROELECTRONICS
元件分類： 運(yùn)動(dòng)控制電子
英文描述： BRUSHLESS DC MOTOR CONTROLLER, PDSO28
封裝： LEAD FREE, SOP-28
文件頁(yè)數(shù)： 15/37頁(yè)
文件大?。?/td> 753K
代理商： E-L8150TR
Obsolete
Product(s)
- Obsolete
Product(s)
Operating description
L8150
Figure 12.
Filter Block Diagram
The filter working principle is explained in the previous diagram (Figure 12): the main
component of the filter circuit is a 12-bit counter that is reset (to the value 0) whenever the
PosFil signal is equal to the Pos one. When the two signals are different (meaning that a
transition is happening), the counter will start counting as long as one of the following
conditions will occur:
●
Pos signal is again equal to former PosFil: in this case a noise is generating some Hall
comparator commutation,
●
the counter has reached or overcome the value set by Filter Length signal: in this case
the internal Hall signals will be latched into the PosFil register; immediately after this
event, PosFil will become equal to Pos and the counter will be reset.
At the same time (at the end of the filtering time), a flip-flop detecting the direction is
updated with the right direction information according to the former Hall decoding PosFil and
the new one Pos, immediately before latching it into the register.
12-bit Filter Length is set to two values according to different possibilities:
●
maximum filtering time, corresponding to 4096 clock periods (
≈420us in the typical
case, same used for pre-charge function) when an hall effect commutation is detected
just after a startup signal edge (SD or FS) and before TMAX/6 is elapsed. This filtering
time is also used when the motor accelerate starting from a stopped condition (no hall
effect commutation is detected from FS or SD edge to TMAX/6)
●
the filter length is a fraction of the elapsed time between two Zero Crossing signal (ZC).
During normal working (in case motor period is shorter than TMAX) it is equivalent to
0.625 electrical degrees.
A ZC signal is produced every time one of these situations happens:
●
a falling edge of the FS signal is detected
●
a rising edge of the HallU signal is detected
●
any hall effect commutations when the high impedance condition is forced by the IC
and the motor is in free-run condition
>=
=
12 BIT
COUNTER
POS FIL
REGISTER
ck
Pos
PosFil
Latch
Enable
Filter
Length
Reset
3
12
DELAY
1 Tclk
>=
=
12 BIT
COUNTER
POS FIL
REGISTER
ck
Pos
PosFil
Latch
Enable
Filter
Length
Reset
3
12
DELAY
1 Tclk
相關(guān)PDF資料
PDF描述
E-L9935013TR STEPPER MOTOR CONTROLLER, 2.5 A, PDSO20
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