Moons' MBDV Series - Brake Action Sequence; REG- Regenerative Energy Absorption Resistor Wiring Method

35
Rev. 2.0
07/27/2023
MBDV Hardware Manual
4.6.3 Brake action sequence
Since the brake has an action delay when releasing and braking, in order to avoid damage to the
brake, it is necessary to pay attention to the action sequence during use.
Release Delay Time
P5-24
Brake Delay Time
P5-25
Actual Movement
OFF
Motion Command
OFF
ON
Brake Release Signal
OFF
ON
Brake Signal
OFF
ON
Motor Enable
OFF
ON
S_ON Signal
OFF
ON
ON
Release delay and braking delay time can be set using Luna software.
4.7 REG- Regenerative energy absorption resistor wiring method
When the torque output of the motor is in the opposite direction of motion, the motor is being back
driven. When the motor is in this state, the motor behaves as a generator and the mechanical
energy of the motor is converted into voltage which is fed back to the driver and power supply.
This results in increased bus voltage for the servo drive and is known as regenerative energy. This
phenomenon is common during the deceleration of high speed applications.
This excessive bus voltage can damage the servo drive as well as the power supply unit of the
system. For this reason, it is common to use a regenerative energy absorption resistor that will
consume any excessive voltage and prevent overvoltage situations.
The MBDV servo family does not have built-in regenerative energy absorption resistors, known as
regen resistors, but allows for external ones to be used. The following shows the recommended
resistor specications for the MBDV family of drives:
Driver
Minimum resistance value of
external absorption resistor
(Ohm)
MBDV-520AC 10
MBDV-2X-520AC 10