Phase AxN series, Installation Manual

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2.3 Brake Resistor
Dynamic braking (DB) helps bring the motor to a smooth and rapid stop when working with high
inertia loads. As the drive lowers the frequency of a motor with high inertia connected,
regeneration occurs. This can cause an overvoltage situation when the regenerative energy flows
back into the DC bus capacitors. A brake resistor prevents these overvoltage faults.
AxN Series Drive has an internal brake resistor inside the drive. And it can also connect an external
brake resistor (Recommended).
WARNING: Do not operate AxN Drive without any brake resistor. Failure to comply may result in
damage to braking circuit or drive.
2.3.1 Internal Brake Resistor
Every AxN Series Drive has an internal brake resistor. Regard to its properties, using internal brake
resistor in real applications is
NOT recommended. Refer to the following table for more details:
AxN Size5 Resistance (Ω) Power (W)
AxN 90.150.4 3.5 150
AxN 110.200.4 3 150
2.3.2 Internal Brake Resistor Installation
Step 1: Fabricate Shortcut Wire
In order to activate the internal brake resistor, a shortcut wire is needed to shortcut terminal Brk+
and DC+. Select a 25mm
2
wire which is longer than 110mm, clamp two RNYB 22-8 ring terminals
on both sides. The recommended strip length is 14mm. Refer to following figure and table for more
detail.
Ring Terminal d2 (mm) W (mm) F (mm) E (mm) D (mm) d1 (mm)
RNYB 22-8 8.4 16.5 13.5 24 13 7.7
Step 2: Find out the Internal Brake Resistor Terminals
DC+ and Brk+, these are the two terminals called Internal Brake Resistor Terminals. AxN Size5
Drive’s Internal Brake Resistor Terminals are in the Power Supply Input Port (P1) which is on the
top of the drive. Refer to the following figure for exact locations and terminal Assignment.