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DRV10974 Datasheet(PDF) 17 Page - Texas Instruments

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No. de pieza DRV10974
Descripción Electrónicos  12-V, Three-Phase, Sensorless BLDC Motor Driver
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

DRV10974 Datasheet(HTML) 17 Page - Texas Instruments

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Time
Speed
Open Loop Acceleration
Align Time
Closed Loop
Speed = Accel1 x t + 0.5 x Accel2 x t
2
17
DRV10974
www.ti.com
SLVSDN2 – JANUARY 2018
Product Folder Links: DRV10974
Submit Documentation Feedback
Copyright © 2018, Texas Instruments Incorporated
Device Functional Modes (continued)
Table 2. Acceleration Profile Settings
RMP SELECTION
RRMP [kΩ]
Accel2 [Hz/s2]
Accel1 [Hz/s]
CLOSED-LOOP
ACCELERATION [s]
CLOSED-LOOP
DECELERATION [s]
0
7.32
0.22
4.6
2.7
44
1
10.7
1.65
9.2
2.7
22
2
14.3
1.65
15
1
22
3
17.8
3.3
25
1
11
4
22.1
7
25
0.2
44
5
28
7
35
0.2
22
6
34
14
50
0.2
22
7
41.2
27
75
0.2
11
8
49.9
27
75
5.4
11
9
59
14
50
8
22
10
71.5
7
35
11
22
11
86.6
7
25
22
44
12
105
3.3
25
5.4
11
13
124
1.65
15
8
22
14
150
1.65
9.2
11
22
15
182
0.22
4.6
22
44
Figure 15. Startup Profile
7.4.3 Start-Up Current Sensing
The start-up peak current is controlled by the current-sense limit resistor, R(CS). The start current is set by
selecting the R(CS) resistor based on Table 3. The current should be selected to allow the motor to accelerate
reliably to the handoff threshold. Heavier loads may require a higher current setting, but the rate of acceleration
is limited by the programmed resistor, R(RMP).


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