參數(shù)資料
型號(hào): AS5140H-ASST
廠商: ams
文件頁數(shù): 19/38頁
文件大小: 1279K
描述: IC ENCODER ROTARY 10BIT 16-SSOP
標(biāo)準(zhǔn)包裝: 2,000
傳感范圍: 45mT ~ 75mT
類型: 線性,旋轉(zhuǎn)編碼器 - 可編程
電源電壓: 3 V ~ 3.6 V,4.5 V ~ 5.5 V
電流 - 電源: 21mA
電流 - 輸出(最大): 4mA
輸出類型: 數(shù)字式,PWM,10 位串行
特點(diǎn): 可編程
工作溫度: -40°C ~ 150°C
封裝/外殼: *
供應(yīng)商設(shè)備封裝: *
包裝: *
www.austriamicrosystems.com/AS5140H
Revision 1.4
18 - 37
AS5140H
Data Sheet - Detailed Description
7.5 Brushless DC Motor Commutation Mode
Brushless DC motors require angular information for stator commutation. The AS5140H provides U-V-W commutation signals for one and two
pole pair motors. In addition to the three-phase output signals, the step (LSB) output at pin 12 allows high accuracy speed measurement. Two
resolutions (9 or 10 bit) can be selected by programming Div0 according to Table 20.
Mode 3.0 (3.1) is used for brush-less DC motors with one-pole pair rotors. The three phases (U, V, W) are 120 degrees apart, each phase is 180
degrees on and 180 degrees off.
Mode 3.2 (3.3) is used for motors with two pole pairs requiring a higher pulse count to ensure a proper current commutation. In this case the
pulse width is 256 positions, equal to 90 degrees. The precise physical angle at which the U, V and W signals change state (Angle in Figure 12
and Figure 13) is calculated by multiplying each transition position by the angular value of 1 count:
Angle [deg] = Position x (360 degree / 1024)
(EQ 4)
Figure 12. U, V and V-Signals for BLDC Motor Commutation (Div1=0, Div0=0)
Figure 13. U, V and W-Signals for 2Pole BLDC Motor Commutation (Div1=1, Div0=0)
Width : 512 Steps
Width : 512 Steps
CW Direction
W
V
U
0
171
341
512
683
853
0
0.0
60.12
119.88
180.0
240.12
299.88
360.0
Position:
Angle:
Commutation - Mode 3.0
(One-pole-pair)
Width : 256 Steps
Width : 256 Steps
CW Direction
W
V
U
0
171
341
512
683
853
0
0.0
60.12
119.88
180.0
240.12
299.88
360.0
Position:
Angle:
Commutation - Mode 3.2
(Two-pole-pairs)
939
768
597
427
256
85
90.0
150.12
209.88
270.00
330.12
29.88
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