Omron M1 Series User Manual

5-12
Regenerative Braking Function
5-12-1
Regenerative Braking Function
• During motor deceleration and elevator descent, regenerative energy sometimes is returned to the
inverter and an overvoltage is detected due to an excessive regenerative amount.
• The regenerative braking function uses the built-in or an external regenerative braking resistor to de-
crease the internal Main Circuit DC Voltage of the inverter by converting the regenerated energy
from the motor into heat via external braking resistors.
• The 3G3M1 Series has a built-in regenerative braking circuit and a regenerative braking function op-
erates at all times regardless of whether the inverter is running or has stopped.
5-12-2
Braking Resistor Electronic Thermal Function
• Either use a braking resistor with thermal contact or use the braking resistor electronic thermal func-
tion for overheat protection of the external braking resistor.
• Use the braking resistor electronic thermal function by setting the discharge capacity, allowable
average loss and resistance value to each of F50, F51 and F52. These values are determined by
inverter model and type of braking resistor.
• To use the regenerative braking function, set Anti-regenerative Control Function Selection (H69) to
“0: Disable.”
Parameter No. Function name Data Default data Unit
F50
Electronic Thermal for Braking
Resistor Discharging Capacity
1 to 9000
32767: Cancel
32767 kWs
F51
Electronic Thermal for Braking
Resistor Allowable A
verage
Loss
0.001 to 99.99 0.001 kW
F52
Braking resistor electronic
thermal braking resistance
0.01 to 999 0.01
Ω
W161
Braking resistor thermal cal-
culated value
0.0 to 100.0 0.0 %
Related function Anti-regenerative Control Function Selection (H69)
• Set the Electronic Thermal for Braking Resistor Discharging Capacity (F50) and Electronic Thermal
for Braking Resistor Allowable Average Loss (F51) by the following formula depending on how the
braking load is applied.

When braking load during deceleration decreases with time
How to apply a braking load Allowable average loss
Thermal braking resistance
value
Braking
l
oa
d (kW)
Tim
e
Electronic Thermal for Braking
Resistor Discharging Capacity
(F50) =
Braking time (s) × Motor capacity (kW)
2
Electronic Thermal for Braking
Resistor Allowable Average
Loss (F51) =
× Motor capacity (kW)
2
%ED(%)
100
5 Basic Settings
5-75
M1 Series Standard Type User's Manual (I669)
5-12 Regenerative Braking Function
5
5-12-1 Regenerative Braking Function

Omron M1 Series Specifications

General

Brand	Omron
Model	M1 Series
Category	Inverter
Language	English