4-2 Function Mode 4 Functions „ DC Injection Braking Carrier Frequency You can set a DC injection braking carrier frequency in A059. Note that setting a 5 kHz or higher frequency automatically reduces the braking power. Refer to the following figure (DC injection braking power limit). 10 9 8 7 6 5 4 Max. braking power 3 2 1 (10) 3 5 7 9 11 13 15 DC Injection Braking Power Limit DC injection braking carrier frequency „ External DC Injection Braking •Allocate 07 (DB) to any of multi-function inputs C001 to C008. •DC injection braking can be applied by turning on/off the DB terminal, regardless of DC injection braking selection A051.
•Set a braking power level in DC injection braking power A054. •If DC injection braking delay time A053 is set, the Inverter output is shut off during the set time period and the motor goes into free-run status. After the set time elapses, DC injection braking starts. •Set DC injection braking time A055 via the Digital Operator or the DB terminal while taking into account motor heat generation. 4-25 Parameter No. Function name Data Default setting Unit A053 DC injection braking delay time 0.0 to 5.0 0.0 s A054 DC injection braking power 0. to 100. 50 % A055 DC injection braking time 0.0 to 60.0 0.5 s A056 DC injection braking method selection 00: Edge operation 01:
Level operation 01 A057 Startup DC injection braking power 0. to 100. 0. % A058 Startup DC injection braking time 0.0 to 60.0 0.0 s A059 DC injection braking carrier frequency 0.5 to 15.0 5.0 Hz Related functions C001 to C008