參數(shù)資料
型號(hào)： 33991
廠商： Motorola, Inc.
英文描述： Gauge Driver Integrated Circuit
中文描述： 儀表驅(qū)動(dòng)集成電路
文件頁(yè)數(shù)： 23/36頁(yè)
文件大?。?/td> 660K
代理商： 33991
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
33991
23
and solving for
v
in terms of
u
,
s
and
t
gives:
The correct value of
t
to use in this equation is the quantized
value obtained above.
From these equations, a set of recursive equations can be
generated to give the allowed time step between motor indexes
when the motor is accelerating from a stop to its maximum
velocity.
Starting from a position
p
of 0, and a velocity
v
of 0, these
equations define the time interval between steps at each
position. To drive the motor at maximum performance, index
commands are given to the motor at these intervals. A table is
generated giving the time step
t
at an index position
n
.
,
where
indicates
rounding up.
Note:
p
n
= n
This means: on the
n
th step, the motor has indexed by
n
positions, and has been accelerating steadily at the maximum
allowed rate. This is critical because, it also indicates the
minimum distance the motor must travel while decelerating to a
stop. In other words, the
stopping distance
is also equal to the
current value of
n
.
The algorithm to drive the motor is similar to:
While the motor is stopped, wait until a command is
received.
Send index pulses to the motor at an ever-increasing rate,
according to the time steps in the table above until:
The maximum velocity is reached, at this point the
time intervals stop decreasing
or,
The distance remaining to travel is less than the
current index in the table. At this point, the stopping
distance is equal to the remaining distance,
ensuring it will stop at the required position, the
motor must begin decelerating.
An example of the table for a particular motor is provided in
Table 14. This motor’s maximum speed is 4800 microsteps/s
(at 12 microsteps/degree), and its maximum acceleration is
54000 microsteps/s2. The table is quantized to a 1 MHz clock.
u
t
v
=
2
0
0
0
0
=
=
v
p
+
+
=
a
a
v
v
t
n
n
n
2
2
1
1
1
2
=
n
n
n
v
t
v
n
p
n
=
Table 14. Velocity Ramp
Velocity
Position
Time Between
Steps (
μ
s)
Velocity
(
μ
Steps/s)
Velocity
Position
Time Between
Steps (
μ
s)
Velocity
(
μ
Steps/s)
Velocity
Position
Time Between
Steps (
μ
s)
Velocity
(
μ
Steps/s)
0
0
0.00
72
363
2771.81
144
255
3931.78
1
16383
122.08
73
360
2791.22
145
255
3945.49
2
6086
350.58
74
358
2810.50
146
254
3959.15
3
2521
480.52
75
355
2829.65
147
253
3972.77
4
1935
582.15
76
353
2848.67
148
252
3986.34
5
1631
668.51
77
351
2867.56
149
251
3999.86
6
1437
744.92
78
348
2886.33
150
250
4013.34
7
1299
814.19
79
346
2904.98
151
249
4026.77
8
1195
878.01
80
344
2923.51
152
249
4040.16
9
1112
937.50
81
342
2941.92
153
248
4053.51
10
1045
993.43
82
340
2960.22
154
247
4066.81
11
988
1046.38
83
338
2978.41
155
246
4080.06
12
940
1096.77
84
336
2996.48
156
245
4093.28
13
898
1144.95
85
334
3014.45
157
245
4106.45
14
861
1191.18
86
332
3032.31
158
244
4119.58
F
Freescale Semiconductor, Inc.
Go to: www.freescale.com
n
.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
33-991 制造商:Ideal Industries Inc 功能描述:LTKII,350MHZ,CAT6 W/CAT6 ADPT
3399-1 制造商:3M 功能描述:3399-1
33992 制造商:Ideal Industries Inc 功能描述:LTKII500MHZ,CAT6A W/CAT6A ADPT
33992510000001 功能描述:電纜組件 CABLE KIT RoHS:否 制造商:Molex 產(chǎn)品:Power Assemblies 類型:Cable Assembly 連接器端口 A:No Connector 連接器端口 A 管腳計(jì)數(shù):4 連接器端口 B:No Connector 連接器端口 B 管腳計(jì)數(shù): 型式:Male 線規(guī) - 美國(guó)線規(guī)（AWG）:20, 28 長(zhǎng)度:0.305 m 顏色:Black, Red
33993 制造商:Ideal Industries Inc 功能描述:LTKII1000MHZ,CAT7A W/CAT6AADPT
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