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ME-20

DM-ME-20

Applicable motor: 180、2247

Magnet poles: 5PPR

Magnet size: Φ 9.75X Φ 2X2mm
 

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  • 产品描述
  • 产品参数
    • Commodity name: ME-20
    • Commodity ID: 1016357486640062464
    • Application Area: Security

    DM-ME-20

    Applicable motor: 180、2247

    Magnet poles: 5PPR

    Magnet size: Φ 9.75X Φ 2X2mm
     

    Key words:
    • DM-ME-20
  • Product Dimensions(unit:mm):

    pic

    Electrical Characteristics:

    Characteristics

    Symbol 

    Test Conditions Values  Unit 
    Min.  Typ.  Max.  V
    Supply Voltage  VS   3.0 - 18 V
    Output Voltage VQ -0.7 - 18 V
    Temperature Tj   -40 - 150
    Output Current IQ   0 - 20 mA
    Supply Current IS Vs = 3.0 V ... 18V 2 4 6 mA
    Reverse Current ISR Vs = -18V 0 0.2 1 mA
    Output Saturation Voltage VQSAT IQ = 20 mA - 0.3 0.6 V
    Output Leakage Current IQLEAK For VQ = 18V - 0.05 10 µA
    Output Fall Time tf

    RL = 1.2 kΩ

    CL = 50 pF

    - 0.02 1 µS
    Output Rise Time tr - 0.4 1 µS

    Waveform:

     

    Using the Encoder:

     

    A two-channel Hall effect encoder is used to sense the rotation of a magnetic disk on a rear protrusion of the motor shaft. The encoder board senses the rotation of the magnetic disc and provides a resolution of 20 counts per revolution of the motor shaft when counting both edges of both channels. To compute the counts per revolution of the gearbox output shaft, multiply the gear ratio by 20.

     

    The hall sensors are powered through the VCC and GND pins. VCC can be 3.0 V to 18 V, and the quadrature outputs A and B are digital signals that are either driven low (0 V) by the sensors or pulled to VCC through 10 kΩ pull-up resistors,depending on the applied magnetic field.The A and B outputs are square waves approximately 90° out of phase. The sensors' comparators have built-in hysteresis, which prevents spurious signals in cases where the motor stops near a transition point.The frequency of the transitions tells you the speed of the motor, and the order of the transitions tells you the direction.

     

    By counting both the rising and falling edges of both the A and B outputs, it is possible to get 20 counts per revolution of the motor shaft. If using just a single edge of one channel (A or B)results in 5 counts per revolution of the motor shaft.

     

     

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