YASKAWA CDBR Manuál s instrukcemi Strana 4

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CDBR-B Installation Instructions - March 2013
4
CDBR-B Installation Instructions
Preface
A Dynamic Braking Unit and Resistor are used to dissipate regenerative energy from the motor.
Whenever an excited motor is operated in the negative slip region or is subjected to an overhauling
load, the motor will behave as an induction generator. In this mode, energy will actually flow from the
motor back into the drive.
This will cause the DC bus voltage to rise. When the DC bus voltage reaches a certain level, the
Dynamic Braking Unit will activate. The Dynamic Braking Unit will shunt the regenerative energy
away from the DC bus capacitors and will dissipate it as heat in the DB resistors. Since the
regenerative energy is dissipated in the resistors, the overvoltage (OV) trip is prevented; thus the
motor remains excited and continues to produce braking torque.
The following Electromotive Systems products can be used with these units:
IMPULSE•G
IMPULSE•G+
IMPULSE•VG+
IMPULSE•G+ Series 2
IMPULSE•VG+ Series 2
IMPULSE•G+ Series 3
IMPULSE•VG+ Series 3
IMPULSE•G+ Series 4
IMPULSE•VG+ Series 4
MagnePulse Digital Magnet Control (DMC)
Receiving
All equipment is tested against defect at the factory. After unpacking, verify that there is no damage
evident. Report any damage or shortage to the commercial carrier who transported the equipment.
Contact your Electromotive Systems sales representative for assistance.
Storage
If the Dynamic Braking unit is not installed immediately, it must be stored under the following
conditions:
Ambient temperature: -10 to +40°C
Protected from rain and moisture
Free from corrosive gases or liquids
Free from dust or metal particles
Clean and dry
Free from excessive vibration
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