Appendix 6 Dynamic Braking Option - YASKAWA V7 Technical Manual

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
CIMR-
V7* MV
20P1 A001
20P2 A002
20P4 A003
20P7 A005
21P5 A008
22P2 A011
23P7 A017
25P5 A025
27P5 A033
40P2 B001
40P4 B002
40P7 B003
41P5 B005
42P2 –
43P7 B009
45P5 B015
47P5 —
(1) Applicable to the V74X model only
Table A6-1. Drive DB Components
Size
Braking Resistor - 3% Duty
HP
Part No.
1/8 50185531
1/4 50185531
1/2 50185430
3/4&1 50185430
2 50185431
3 50185432
5 50185433
7.5 N/A
10 N/A
1/2 50185530
3/4 50185530
1&2 50185530
3 50185531
3 50185531
5 50185531
7.5&10 N/A
(1) N/A
15
DB Components
Braking Resistor - 10% Duty
Qty. Reqd. Part No.
1 —
1 —
1 05P00041-0825
1 05P00041-0825
1 05P00041-0827
1 05P00041-0827
1 05P00041-0828
— 05P00041-0829
— 05P00041-0830
1 05P00041-0835
1 05P00041-0835
1 05P00041-0835
1 05P00041-0837
1 05P00041-0837
2 05P00041-0838
— 05P00041-0840
— 05P00041-0841
A6-1
Minimum
Connect
Resistance (SL)
Qty Reqd.
— 300
— 300
1 200
1 120
1 60
1 60
1 32
1
1
1 750
1 750
1 510
1 240
1 240
1 100
1
1