Voltage
Default Value
110V
390
200V
390
400V
780
575V
930
690V
1120
Braking IGBT Lower Threshold
(06.073) defines the lowest level of
D.c. Link Voltage
(05.005) where the braking IGBT will become active and
Braking IGBT Upper Threshold
(06.074) defines
the level of
D.c. Link Voltage
(05.005) where the braking IGBT will be on continuously. When the braking IGBT is turned on it will remain on for at least 1ms. The braking IGBT on-time is defined
by the thresholds and the d.c. link voltage as given in the table below where L =
Braking IGBT Lower Threshold
(06.073) and U =
Braking IGBT Upper Threshold
(06.074).
D.c. link voltage level
On-time
D.c. Link Voltage
(05.005) < L
0%
L ≤
D.c. Link Voltage
(05.005) ≤ U
[(
D.c. Link Voltage
(05.005) - L) / (U - L)] x 100%
D.c. Link Voltage
(05.005) ≥ U
100%
As the
D.c. Link Voltage
(05.005) rises above the lower threshold the braking IGBT is active with an on/off ratio of 1/100. As the voltage rises further, the on/off ratio increases until at the upper
threshold the braking IGBT is on continuously. The upper and lower voltage threshold can be set up so that braking resistors in drives with parallel connected d.c. links will share the braking
load.
If
Braking IGBT Lower Threshold
(06.073) ≥
Braking IGBT Upper Threshold
(06.074) then the braking IGBT is off when
D.c. Link Voltage
(05.005)
Braking IGBT Upper Threshold
(06.074) and
on if
D.c. Link Voltage
(05.005) ≥
Braking IGBT Upper Threshold
(06.074). This method of control is the same as that used in Commander SK and the default values for the braking thresholds
are equal to the braking thresholds in Commander SK.
Unless sharing between braking resistors is required the braking thresholds do not normally need to be adjusted. Care should be taken when reducing the thresholds because if either threshold
is below the maximum value of the peak rectified supply voltage the braking resistor could take power from the supply.
The list below gives conditions that will disable the braking IGBT:
1.
Braking IGBT Upper Threshold
(06.074) = 0, or
Low Voltage Braking IGBT Threshold Select
(06.076) = 1 and
Low Voltage Braking IGBT Threshold
(06.075) = 0.
2. The drive is in the under-voltage state.
3. A priority 1, 2 or 3 trip is active.
4. There is a fault in the control system power supply.
5. The hardware or software over-temperature systems indicate that the braking resistor is too hot.
6. A braking IGBT over-current trip is active
OI Brake
.
Parameter
06.074
Braking IGBT Upper Threshold
Short description
Defines the level of the d.c. bus voltage where the braking IGBT will be on continuously
Mode
Open
‑
loop
Minimum
−VM_DC_VOLTAGE_SET
Maximum
VM_DC_VOLTAGE_SET
Default
See exceptions below
Units
V
Type
16 Bit User Save
Update Rate
Background
Display Format
Standard
Decimal Places
0
Coding
RW, VM, RA
Voltage
Default Value
110V
390
200V
390
400V
780
575V
930
690V
1120
See
Braking IGBT Lower Threshold
(06.073).
Parameter
06.075
Low Voltage Braking IGBT Threshold
Short description
Defines the threshold used for low voltage braking
Mode
Open
‑
loop
Minimum
−VM_DC_VOLTAGE_SET
Maximum
VM_DC_VOLTAGE_SET
Default
0
Units
V
Type
16 Bit User Save
Update Rate
Background
Display Format
Standard
Decimal Places
0
Coding
RW, VM, RA
If
Low Voltage Braking IGBT Threshold Select
(06.076) = 0 the normal thresholds are used. If
Low Voltage Braking IGBT Threshold Select
(06.076) = 1 then
Low Voltage Braking IGBT Threshold
(06.075) is used for both upper and lower thresholds. This allows a different braking threshold to be set for low voltage operation.
Parameter
06.076
Low Voltage Braking IGBT Threshold Select
Short description
Set to 1 enable low voltage IGBT braking
Mode
Open
‑
loop
Minimum
0
Maximum
1
Default
0
Units
Type
1 Bit Volatile
Update Rate
Background
Display Format
Standard
Decimal Places
0
Coding
RW
See
Low Voltage Braking IGBT Threshold
(06.075)
Parameter
06.077
Low DC Link Operation
Short description
Set to 1 to allow a 400V drive to be ran from a 240V supply
Mode
Open
‑
loop
Minimum
0
Maximum
1
Default
0
Units
Type
1 Bit User Save
Update Rate
Background read
Display Format
Standard
Decimal Places
0
Coding
RW
On the 400V product setting this bit will enable the drive to run from a 240VAC input. Low DC Link Operation is enabled when
Low DC Link Operation
(06.077) is set to one. See figure below.
Unidrive M200 Parameter Reference Guide
Issue: 01.05.00.10
97
Содержание unidrive m200
Страница 1: ...Parameter Reference Guide Unidrive M200 Open loop Mode Issue 01 05 00 10 ...
Страница 29: ...Menu 2 Frequency Ramps Mode Open loop Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 29 ...
Страница 30: ...30 Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 ...
Страница 83: ...Enable logic Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 83 ...
Страница 100: ...Menu 7 Analog I O Mode Open loop 100 Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 ...
Страница 113: ...Menu 8 Digital I O Mode Open loop Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 113 ...
Страница 125: ...Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 125 ...
Страница 144: ...Menu 10 Status and Trips Mode Open loop 144 Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 ...
Страница 145: ...Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 145 ...
Страница 204: ...204 Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 ...