Sigma II User’s Manual
Chapter 5: Parameter Settings and Functions
5-127
5.8.7
DB Unit
Large capacity amplifiers (22-55kW) do not have internal DB resistors. An external
DB unit is needed if dynamic braking function is required for the application.
Externally attach a DB unit to the amplifier.
This DB unit is used for dissipating motor EMF energy.
The DB unit does not need to be installed if the dynamic brake function is not
required.
Specifications
Use one of the following DB units according to the Amplifier model.
SDGH-
2BDE
3ZDE
3GDE
4EDE
5EDE
Regenerative DB Unit JUSP-
DB03
DB04
DB05
DB06
DB contactor and surge
absorbtion unit
Built into Amplifier
Built into DB unit
Resistance
0.8
Ω
Resistance Capacity
180W
300W
Allowable Load Moment of
Inertia
5 times the load moment of inertia at motor shaft.
Allowable Duty
Less than 1 time/H at maximum speed DB operation.
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