AxN Configurable Motion Control Platform
29
Internal Brake Resistor Activation
External Brake Resistor
The External Brake Resistor must be sized properly in order to dissipate the required power to
decelerate the load in desired time. There are three important factors:
Resistance, Maximum
Absorb Energy
and
Maximum Power.
Resistance
The selection of the external brake resistor resistance must be proper. If the resistance is smaller
than Minimum Resistance, the IGBT might be damaged by the overload brake current. And if the
resistance is bigger than Maximum Resistance, the brake procedure might be abort because of the
high DC-Bus Voltage (over 900V).Refer to following table to check the Minimum and Maximum
Resistance of external brake resistor:
Minimum Resistance (Ω)
Maximum Resistance (Ω)
AxN 09.20.4
19
30
Maximum Absorb Energy and Maximum Power
Maximum Absorb Energy and Maximum Power are two important factors to evaluate the energy
absorption ability of the brake resistor. The values of these two factors may differ from one
application to another, but the basic idea is always the same, to dissipate the required power to
decelerate the load in desired time.
NOTE: Brake resistor wires’ insulation grade must be higher than 1000Vac and 3000Vdc.
Installation
Connect the brake resistor’s wires to the Terminals,
DC+/B+
and
B-
. For AxN 09.20.4 drive, the
nominal torque to tight these terminals is 0.5 ~ 0.6 N
∙
m.
Содержание AxN
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