YASKAWA V7

A6-1
Appendix 6. DYNAMIC BRAKING OPTION
GENERAL. Dynamic braking (DB) enables the motor to be brought to a smooth and rapid stop.
This is achieved by dissipating the regenerative energy of the AC motor across the resistive compo-
nents of the Dynamic Braking option. For further details on dynamic braking, see the option instruc-
tion sheet shipped with the dynamic braking components.
The Drive has an integral braking transistor. However, to make use of the Dynamic Braking function
requires addition of either a Braking Resistor (for 3% duty cycle) or Braking Resistor Unit (for 10%
duty cycle). See table below. In either case, interface to external control circuitry is necessary to
ensure that dynamic brake resistor overheating is communicated to the drive as a fault condition.
Model Size
DB Components
Minimum
CIMR- Braking Resistor - 3% Duty Braking Resistor - 10% Duty Connect
V7* MV
HP
Part No. Qty. Reqd. Part No. Qty Reqd.
Resistance (SL)
20P1 A001 1/8 50185531 1 — — 300
20P2 A002 1/4 50185531 1 — — 300
20P4 A003 1/2 50185430 1 05P00041-0825 1 200
20P7 A005 3/4&1 50185430 1 05P00041-0825 1 120
21P5 A008 2 50185431 1 05P00041-0827 1 60
22P2 A011 3 50185432 1 05P00041-0827 1 60
23P7 A017 5 50185433 1 05P00041-0828 1 32
25P5 A025 7.5 N/A — 05P00041-0829 1
27P5 A033 10 N/A — 05P00041-0830 1
40P2 B001 1/2 50185530 1 05P00041-0835 1 750
40P4 B002 3/4 50185530 1 05P00041-0835 1 750
40P7 B003 1&2 50185530 1 05P00041-0835 1 510
41P5 B005 3 50185531 1 05P00041-0837 1 240
42P2 – 3 50185531 1 05P00041-0837 1 240
43P7 B009 5 50185531 2 05P00041-0838 1 100
45P5 B015 7.5&10 N/A — 05P00041-0840 1
47P5 —
15
(1)
N/A — 05P00041-0841 1
Table A6-1. Drive DB Components
(1)
Applicable to the V74X model only