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    參數(shù)資料
    型號: SD-14553FS-372Z
    廠商: DATA DEVICE CORP
    元件分類: 位置變換器
    英文描述: SYNCHRO OR RESOLVER TO DIGITAL CONVERTER, CDMA34
    封裝: CERAMIC, FP-34
    文件頁數(shù): 9/12頁
    文件大?。?/td> 115K
    代理商: SD-14553FS-372Z
    6
    Data Device Corporation
    www.ddc-web.com
    SD-14550 Series
    Rev. H
    shown in FIGURE 4, output data is valid 150 nanoseconds max-
    imum after the application of a low-going enable pulse. The tri-
    state data bus returns to the high impedance state 100 nanosec-
    onds maximum after the rising edge of the enable signal.
    DYNAMIC PERFORMANCE
    A type II servo loop (Kv =
    ∞) and very high acceleration con-
    stants give the SD-14550 superior dynamic performance.
    TRANSFER FUNCTION AND BODE PLOT
    The dynamic performance of the converter can be determined
    from its functional block diagram (FIGURE 1), its transfer func-
    tion block diagram (FIGURE 5), and its bode plots (open and
    closed loop - FIGURE 6). Values for the transfer function block
    can be obtained from TABLE 3.
    The open loop transfer function is as follows:
    where A is the gain coefficient
    and B is the frequency of lead compensation
    2
    S
    A
    +1
    (
    )
    B
    2
    S
    +1
    (
    )
    10B
    Open Loop Transfer Function =
    -12
    db/oct
    GAIN = 4
    BA
    2A
    -6 db/oct
    10B
    ω (rad/sec)
    2A
    2 2 A
    ω (rad/sec)
    f
    = BW =
    3db
    2 A (Hz)
    π
    CLOSED LOOP
    OPEN LOOP
    - GAIN = 0.4
    (B=A/2)
    (CRITICALLY DAMPED)
    FIGURE 6. BODE PLOTS
    ERROR PROCESSOR
    RESOLVER
    INPUT
    (
    θ)
    VELOCITY
    OUT
    DIGITAL
    POSITION
    OUT (
    φ)
    VCO
    CT
    S
    A
    + 1
    1
    B
    S
    + 1
    10B
    H = 1
    +
    -
    e
    A2
    S
    2
    S
    A
    +1
    (
    )
    B
    2
    S
    +1
    (
    )
    10B
    Open Loop Transfer Function =
    WHERE:
    2
    A = A A
    1
    2
    FIGURE 5. TRANSFER FUNCTION BLOCK DIAGRAM
    TABLE 3. DYNAMIC CHARACTERISTICS
    DEVICE TYPE
    60 Hz
    “S” OPTION
    Input Frequency
    Bandwidth (Closed Loop)
    Ka
    A1
    A2
    A
    B
    Hz
    1/s2
    1/s
    47 - 5K
    15
    830
    0.17
    5K
    29
    14.5
    1K - 5K
    150
    110K
    2.47
    44.4K
    333
    166
    RESOLUTION
    BITS
    16
    14
    12
    10
    16
    14
    12
    10
    Tracking Rate (rps)
    typical
    minimum
    Acceleration ( 1 LSB lag)
    Settling Time (179° step max)
    rps
    deg/s2
    msec
    0.5
    0.4
    11.3
    2500
    2
    1.6
    45
    1100
    8
    6.4
    180
    500
    32
    25.6
    720
    400
    2.5
    2
    610
    232
    10
    8
    2440
    150
    40
    32
    9760
    78
    160
    128
    39K
    51
    400 Hz
    360 - 5K
    56
    53K
    0.41
    41K
    130
    81
    16
    14
    12
    10
    2.5
    2
    93
    360
    10
    8
    372
    180
    40
    32
    1490
    100
    160
    128
    5950
    90
    TABLE 4. ACCURACY/RESOLUTION
    VERSION
    RESOLUTION VS ACCURACY
    (In LSB’s - See Note 2)
    10 BIT
    12 BIT
    14 BIT
    16 BIT
    SD-1455X-XX
    ACCURACY
    (minutes)
    See Note 1
    4 +1 LSB
    2 +1 LSB
    2
    4
    3
    13
    7
    SD-1455X-XS
    (“S” option)
    * 1.3 minute (4 LSB) accuracy available for “S” option only.
    Inclusive of 1 bit of jitter.
    Note 1: Accuracy Base measured in 16 bit mode.
    Note 2: Accuracy in Resolution rounded up to next LSB:
    LSB in 16 Bit mode = 0.3 minutes
    LSB in 14 Bit mode = 1.3 minutes
    LSB in 12 bit mode = 5.3 minutes
    LSB in 10 Bit mode = 21.1 minutes
    4 +1 LSB
    2 +1 LSB
    1 +1 LSB
    2
    4
    3
    2
    13
    7
    4*
    ACCURACY AND RESOLUTION
    TABLE 4 lists the total accuracy including quantitation for the var-
    ious resolutions and accuracy grades.
    UNITS
    PARAMETER
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