User Manual
EM100 Mini Inverter
119
Appendix B: Accessories
1. Selecting Braking Resistor
When inverter is in the process of operation, if motor speed decreases too fast or motor
load vibrates too fast, the electric potential energy of motor will charge the internal
capacitor of inverter through inverter, so that inverter would be damaged due to the voltage
increase of IGBT. The inverter will control such situation internally based on real load
condition. An external resistor is needed for energy release when brake performance could
not meet the working requirements. External braking resistor is in dynamic braking mode,
and the function is to absorb the energy. Therefore, its power rating and resistance shall be
selected appropriately. See the table below for selecting the braking resistor for EM100
with appropriate power rating and resistance.
Inverter Model
No.
Motor Power
(kW)
Resistor
Resistance()
Resistor power
(W)
Cable Size
(mm
2
)
EM100-0R4-1B
0.4 ≧360 ≧100 1
EM100-0R7-1B 0.75
≧180 ≧200 1.5
EM100-1R5-1B 1.5
≧180 ≧200 1.5
EM100-2R2-1B 2.2
≧90 ≧400 2.5
EM100-0R7-1B 0.75
≧360 ≧200 1
EM100-1R5-1B 1.5
≧180 ≧400 1.5
EM100-2R2-1B 2.2
≧180 ≧400 1.5
EM100-4R0-3B 4.0
90 800 2.5
EM100-5R5-3B 5.5
60 1000 4
EM100-7R5-3B 7.5
60 1000 4
EM100-011-3B 11
30 2000 6
EM100-015-3B 15
30 2000 6
Remarks:
Cables listed in above table refer to the lead cable of single resistor. The DC bus should
be uprated if the resistors are in parallel connection. Cable should withstand voltage
above AC300V when connecting to 1-phase inverter, or aboveAC450V when
connecting to 3-phase inverter, and temperature resistance of cable: 105℃. Because
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