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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

                                                                                                                TM TM
 34  1-540-633-3545  www                                                                                              169
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