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Servo Drive Accessories

            Motor Chokes

            Shielded motor cables
            For reasons of electromagnetic compatibility, the motor must be supplied with power via a shielded cable. The structure of a cable with 100% shielding
            and the capacity equivalent circuit diagram (to earth) are shown below.                                                                                                                                                                SER

                                                   U                                         M                                                                                                                                                     V
                                                  Drive  V                                   3~                                                                                                                                        C
                                                   W                                                                                                                                                                                               DRIVE A
                                                      Motor choke
                                            Core   PE
                                  Isolation                      Capacity Phase-to-Shield
                            Fill material  Core Isolation     and Phase-to-PE of the motor cable                                                                                        D                                     E                    CCESSORIES
                                                                                                                                                                                        A                                     B
            Why use motor chokes?
             •  To compensate high capacitive charge/discharge currents typical of shielded motor cables approximately 25 m and longer.
             •  To reduce current alternation noise in the motor.
             •  To reduce current ripple in the motor.                                                                                 Rated Data                                    Sym        DIM       3YLN-06     3YLN-14     3YLN-24
                                                                                                                                       Rated current                                 I0rms        A          6           14         24
            The digital drives high switching frequencies and steep switching edges give rise to the transfer of capacitive currents to the shield by the three phases   Rated voltage  Unom      V                     480
            (U, V, W). These currents flow from the shield to earth. Depending on the cable length and cable capacity (determined by design), this can lead to the
            generation of shield currents with peak values of up to 20 A.                                                              Rated frequency                               fnom        Hz                    0 to 150
            These shield currents place a load on the drives and motor. On large systems, this can lead to shifts in potential which can damage other components.  Max. frequency    fmax        kHz                     8
            This effect is evident on systems with multiple drives operating in parallel on the same mains filter.                     Inductivity                                    L          µH          900        900         450

            The motor chokes slow down the rate of rise of the motor current (reduce edge steepness), thereby reducing the             Power loss                                     P          W           12         19.4        23.2
            current transferred to the shield.                                                                                         Protection class                               -           -                     IP00

                                                                                                                                       Temperature class                              -           -                      F
            Why is the cross-section of the motor cable important?
                                                                                                                                       Operation class                                -           -                      S1
            Motor cables longer than 50 m with a small cross-section (e.g. 4 x 1.0 mm ) and therefore a higher equivalent resistance
            are able to reduce the oscillation tendency of the LCR oscillating circuit (drive/choke/cable/motor). This cross-section can  Weight                                      G          kg          4.5         10         10
            also be advantageous for cable lengths shorter than 50 m if the cable capacity and motor inductance are very high. However,  Cable diameter (Shield clamp)                -          mm                    4 to 13.5
            the current loading of the cable must always be within the limits specified by industry standards.
                                                                                                                                       Wiring cross section max. (Terminals)          -          mm 2        10          16         16
                          Drive*                      Motor choke        Description                                                   Width                                          A          mm          155        190         190
                          AKD-x003 to AKD-x006        3YLN-06            Motor cable ≥ 25m
                                                                                                                                       Depth                                          B          mm          90         125         125
                          AKD-x012                    3YLN-14            Motor cable ≥ 25m
                          AKD-x024                    3YLN�24            Motor cable ≥ 25m                                             Height                                         C          mm          195        230         230
                          *= x means variants -B, -P, -T or -                                                                          Mounting hole distance                         D          mm          130        170         170

                          Part Number      Nominal Current  Approvals    Description                                                   Mounting hole distance                         E          mm         56.5         78         78
                          DE-107929        6 A             CE, UL        Motor choke 3YLN-06                                           Mounting screws                                F           -         4xM6        4xM6       4xM6
                          DE-107931        14 A            CE, UL        Motor choke 3YLN-14
                          DE-201447        24 A            CE, UL        Motor choke 3YLN-24

     34 168                                                                                            1-540-633-3545                                                                                          TM    35
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