Control Techniques Unidrive User Manual

Unidrive SP Low Voltage DC Installation Guide 33
Issue Number: 1 www.controltechniques.com
Safety Information Introduction Product information System design
Component data
Index
5.3 Brake resistor
As the DC bus voltage varies the motor power available varies in proportion to the
voltage but the power that may be dissipated in a brake resistor varies with the square
of the voltage. To enable the maximum brake power to match that from the motor in Low
Voltage DC mode, the brake resistor value must be reduced in proportion to the voltage,
therefore a resistor is required in parallel with the normal operation brake resistor.
Please refer to the Unidrive SP User Guide for normal operation brake resistor values.
The table below shows the R_LVDC value resistor that is to be fitted in parallel with the
normal operation brake resistor.
Table 5-4 Brake resistor values (R_LVDC) Unidrive SP 1 to 6
Pr 6.46 48V
60V 72V 84V 96V
Drive
(Ω)
Peak
power
(kW)
Average
power
over 60s
(kW)
(Ω)
Peak
power
(kW)
Average
power
over 60s
(kW)
(Ω)
Peak
power
(kW)
Average
power
over 60s
(kW)
(Ω)
Peak
power
(kW)
Average
power
over 60s
(kW)
(Ω)
Peak
power
(kW)
Average
power
over 60s
(kW)
SP1201
to 1203
7.4 0.55 0.49 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
SP1204 4.9 0.83 0.72 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
SP2201
to 2203
3.0 1.35 1.35 3.8 1.66 1.66 4.8 1.90 1.90 N/A N/A N/A N/A N/A N/A
SP3201
to 3202
1.1 3.68 3.14 1.5 4.21 3.92 1.8 5.06 4.71 N/A N/A N/A N/A N/A N/A
SP4201
to 4203
0.75 5.62 5.38 1.0 6.32 6.32 1.2 7.58 7.58 N/A N/A N/A N/A N/A N/A
SP1401
to 1404
6.9 0.59 0.36 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
SP1405
to 1406
4.5 0.90 0.65 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
SP2401
to 2404
1.7 2.38 1.83 2.2 2.87 2.29 2.7 3.37 2.75 N/A N/A N/A N/A N/A N/A
SP3401
to 3403
1.4 2.89 2.69 1.8 3.51 3.36 2.2 4.14 4.04 N/A N/A N/A N/A N/A N/A
SP4401
to 4402
1.0 4.40 4.40 1.2 5.27 5.27 1.5 6.07 6.07 1.7 7.29 7.29 2.0 8.09 8.09
SP4403 0.7 5.86 5.50 0.9 7.02 6.88 1.1 8.27 8.26 1.3 9.53 9.53 1.5 10.79 10.79
SP5401 0.45 8.99 6.73 0.6 10.53 8.41 0.7 13.0 10.09 0.9 13.76 11.77 1.0 16.18 13.45
SP5402 0.45 8.99 8.99 0.6 10.53 10.53 0.7 13.0 13.0 0.7 13.76 13.76 0.8 20.22 18.35
SP6401
to 6402
0.35 11.9 11.90 0.5 12.64 12.64 0.6 15.17 15.17 0.7 17.70 17.70 0.7 23.11 23.11
SP3501
to 3507
1.4 3.00 1.54 1.8 3.51 1.92 2.1 4.33 2.31 N/A N/A N/A N/A N/A N/A
SP4601
to 4606
0.9 4.49 3.83 1.2 5.27 4.79 1.4 6.50 5.75 1.7 7.29 6.71 1.9 8.52 7.67
SP5601
to 5602
0.7 5.95 5.95 0.9 7.02 7.02 1.1 8.27 8.27 1.3 9.53 9.53 1.5 10.79 10.79
SP6601
to 6602
To be confirmed

Control Techniques Unidrive Specifications

General

Brand	Control Techniques
Model	Unidrive
Category	Power Supply
Language	English