參數(shù)資料
型號(hào)： AMIS-30624PGA
英文描述： I2C Microstepping Motordriver
中文描述： 的I2C微步Motordriver
文件頁(yè)數(shù)： 37/56頁(yè)
文件大小： 1256K
代理商： AMIS-30624PGA
AMIS-30624 I
2
C Microstepping Motordriver
Data Sheet
15.4 Motion Detection
Motion detection is based on the back emf generated internally in the running motor. When the motor is blocked, for example when it
hits the end-position, the velocity and as a result also the generated back emf, is disturbed. The AMIS-30624 senses the back emf,
calculates a moving average and compares the value with two independent threshold levels: Absolute threshold (
AbsThr[3:0]
) and
Delta threshold (
DelThr[3:0]
). Instructions for the correct use of these two levels in combination with three additional parameters
(MinSamples, FS2StallEn and DC100SDis) are outside the scope of this datasheet. Detailed information is available in a dedicated
white paper “Robust Motion Control with AMIS-3062x Stepper Motor Drivers”, available on
http://www.amis.com/
.
If the motor is accelerated by a pulling or propelling force and the resulting back emf increases above the Delta threshold (+
THR),
then
<DelStallHi>
is set. When the motor is slowing down and the resulting back emf decreases below the Delta threshold
(-
THR), then
<DelStallLo>
is set. When the motor is blocked and the velocity is zero after the acceleration phase, the back emf is
low or zero. When this value is below the Absolute threshold,
<AbsStall>
is set. The <
Stall>
flag is the OR function of
<DelStallLo> OR <DelStallHi> OR <AbsStall>.
AbsStall
t
Velocity
V
max
V
min
t
Motor speed
Vbemf
V
ABSTH
t
Back emf
Vbemf
DeltaStallHi
t
V
bemf
V
bemf
+
THR
-
THR
t
DeltaStallLo
t
Figure 22:Triggering of the Stall Flags in Function of Measured Back emf and the Set Threshold Levels
Table 24: Truth Table
Condition
Vbemf < Average - DelThr
Vbemf > Average + DelThr
Vbemf < AbsThr
The motion will only be detected when the motor is running at the maximum velocity, not during acceleration or deceleration.
If during positioning a mechanical obstacle is detected (stall), an (internal) hardstop is generated. The motor will stop immediately and
as a consequence the <StepLoss> and <Stall> flags are set. The position in the internal counter will be copied to the ActPos register.
All flags can be read out with the
GetFullStatus1
.
If Stall appears during DualPosition then the first phase is cancelled (via internal Hardstop) and after timeout (26.6ms) the second
phase at V
min
starts.
Important Remark:
Using
GetFullStatus1
will read
AND
clear the following flags: <
Steploss>
, <
Stall>
,
<AbsStall>
,
<DelStallLo>
, and
<DelStallHi>
.
New positioning is possible and the ActPos register will be further updated
.
Motion detection is disabled when the RAM registers AbsThr[3:0] and DelThr[3:0] are empty or zero. Both levels can be programmed
using the I
C command
SetStallParam
in the registers AbsThr[3:0] and DelThr[3:0]. Also in the OTP register
AbsThr[3:0]
and
DelThr[3:0]
can be set using the I
C command
SetOTPParam
. These values are copied in the RAM registers during power on reset.
<DelStallLo>
1
0
0
<DelStallHi>
0
1
0
<AbsStall>
0
0
1
<Stall>
1
1
1
37
AMI Semiconductor
– Apr. 2007, Rev 3.1, M-20664-003
www.amis.com
相關(guān)PDF資料
PDF描述
AMIS-30624PNA I2C Microstepping Motordriver
AMIS-3062X Bus Microstepping Motordriver Family
AMIS-30663 High Speed CAN Transceiver
AMIS30663NGA High Speed CAN Transceiver
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AMIS-30624PNA 制造商:AMI 制造商全稱:AMI 功能描述:I2C Microstepping Motordriver
AMIS-3062X 制造商:AMI 制造商全稱:AMI 功能描述:Bus Microstepping Motordriver Family
AMIS3062XAGEVK 功能描述:電源管理IC開發(fā)工具 AMIS-3062x Automotive Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
AMIS3062XGEVK 功能描述:電源管理IC開發(fā)工具 AMIS30624 eval kit mother board RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
AMIS-30660 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Speed CAN Transceiver
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