Derating Of Dc Braking - Hitachi L300P Series Instruction Manual

3–18
"A" Group: Standard Functions
Func.
Name
Code
A051 DC braking enable
A052 DC braking frequency
setting
A053 DC braking wait time
A054 DC braking force during
deceleration
A055 DC braking time for
deceleration
A056 DC braking / edge or
level detection for [DB]
input
A057 DC braking force for
starting
A058 DC braking time for
starting
A059 DC braking carrier
frequency setting
Maximum
braking ratio (%)
"A" Function
Description
Two options; select codes:
00 Disable
01 Enable
The frequency at which DC
braking activates during
decel.
Range is 0.00 to 60.00 Hz
The delay after reaching the
DC braking frequency, or
[DB] signal, before DC
braking begins.
Range is 0.0 to 5.0 seconds
Variable DC braking force.
Range is from 0% to 70%
Sets the duration for DC
braking during decel. Range
is 0.0 to 60.0 seconds
Two options; select codes:
00 Edge detection
01 Level detection
Variable DC braking force.
Range is 0 to 70%
Sets the duration for DC
braking before accel.
Range is 0.0 to 60.0 seconds
Range is 0.5 to 12 kHZ for
models up to –750xxx,
range is 0.5 to 8kHz for
900xxx – 1320xxx models
Derating of DC Braking – The inverter uses an internal carrier frequency (set by A059) to
generate a DC braking voltage (do not confuse with main inverter output carrier frequency set
by B083). The maximum DC braking force available to the inverter is more limited with higher
DC braking carrier frequency settings for A059 according to the graphs below.
Models 11 – 75kW
70
(58)
60
50
40
30
20
10
3
DC braking carrier frequency
Defaults
Run
Mode
Edit
–FE2 –FU2
Lo Hi
(EU) (US)
✘ ✔
00 00
✘ ✔
0.50 0.50
✘ ✔
0.0 0.0
✘ ✔
0. 0.
✘ ✔
0.0 0.0
✘ ✔
01 01
✘ ✔
0. 0.
✘ ✔
0.0 0.0
✘ ✘
3.0 3.0
Maximum
braking ratio (%)
(46)
(34)
(22)
(10)
5 7 9 11 12 kHz
SRW Display
Units
–FR
(JP)
00 — >A051 DCB
Mode
0.50 Hz >A052 DCB
F 00.50Hz
0.0 sec. >A053 DCB
WAIT
0. % >A054 DCB
STP-V
0.0 sec. >A055 DCB
STP-T
01 — >A056 DCB
KIND
0. % >A057 DCB
STA-V
0.0 sec. >A058 DCB
STA-T
3.0 kHz
>A059 DCB
CARRIER 05.0kHz
Models 90 – 132kW
70
60
(50)
50
40
30
(25)
20
(10)
10
3 5 7 8
DC braking carrier frequency
OFF
0.0s
000%
00.0s
LEVEL
000%
00.0s
kHz