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参数资料
| 型号： | ADW71205WSTZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 19/20页 |
| 文件大小： | 0K |
| 描述： | IC RDC 12BIT W/REF OSC 44LQFP |
| 标准包装： | 1,500 |
| 位数： | 12 |
| 数据接口： | 串行，并联 |
| 转换器数目： | 3 |
| 功率耗散（最大）： | 50mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LQFP |
| 供应商设备封装： | 44-LQFP（10x10） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个差分，单极 |
AD2S1205
Rev. A | Page 8 of 20
RESOLVER FORMAT SIGNALS
06
33
9-
0
03
Vr = Vp × Sin(ωt)
Vb = Vs × Sin(ωt) × Sin(θ)
(A) CLASSICAL RESOLVER
S1
S3
Va = Vs × Sin(ωt) × Cos(θ)
S2
S4
R1
R2
θ
Vr = Vp × Sin(ωt)
Vb = Vs × Sin(ωt) × Sin(θ)
(B) VARIABLE RELUCTANCE RESOLVER
S1
S3
Va = Vs × Sin(ωt) × Cos(θ)
S2
S4
R1
R2
θ
Figure 3. Classical Resolver vs. Variable Reluctance Resolver
A classical resolver is a rotating transformer that typically has a
primary winding on the rotor and two secondary windings on
the stator. A variable reluctance resolver, on the other hand, has the
primary and secondary windings on the stator and no windings
on the rotor, as shown in Figure 3; however, the saliency in this
rotor design provides the sinusoidal variation in the secondary
coupling with the angular position. For both designs, the resolver
output voltages (S3 S1, S2 S4) are as follows:
Sinθ
t
Sin
E
S1
S3
0
×
ω
=
)
(
(1)
Cosθ
t
Sin
E
S4
S2
0
×
ω
=
)
(
where:
θ is the shaft angle.
Sin(ωt) is the rotor excitation frequency.
E0 is the rotor excitation amplitude.
The stator windings are displaced mechanically by 90° (see
Figure 3). The primary winding is excited with an ac reference.
The amplitude of subsequent coupling onto the secondary
windings is a function of the position of the rotor (shaft)
relative to the stator. The resolver therefore produces two
output voltages (S3 S1, S2 S4), modulated by the sine and
cosine of the shaft angle. Resolver format signals refer to the
signals derived from the output of a resolver, as shown in
Equation 1. Figure 4 illustrates the output format.
0
633
9-
0
04
0°
S2 – S4
(COSINE)
S3 – S1
(SINE)
R2 – R4
(REFERENCE)
90°
180°
θ
270°
360°
Figure 4. Electrical Resolver Representation
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| ADW71205YSTZ | 功能描述:IC ADC RDC 12BIT W/OSC 44-LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
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