The function of the braking unit is to divert into a braking resistor

The function of the braking unit is to divert into a braking resistor

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Product Introduction

The function of the braking unit is to divert into a braking resistor the regenerative energy produced in the process of decelerating the motor, converting that energy into heat. Regenerative energy flows from the motor into the inverter DC Bus, manifested as increased bus voltage. The advantage gained using the braking unit is improved braking performance and shorter deceleration time of the load.

The braking unit in the DBU series is applied to consume in the braking resistor the regenerative energy produced in the deceleration process of the motor in the form of heat energy .In this way ,the braking performance of the frequency inverter is improved and the braking time of the frequency inverter  is reduced.

Features

  1. Safety: The tripping function of the equipment against IGBT short circuit and breakdown can effectively avoid the hidden danger of fire caused by the breakdown of IGBT and the overload operation of the resistor in a long time.
  2. Wide Compatibility :The special design of this braking unit allows for the usage of common resistance rather than the non-inductive resistance .It can be adjusted to adapt to 600V-760V DC chopper wave voltage . Further more, this device is used in various type of medium and low voltage frequency inverter (Specially designed product reaches up to 1200V)
  3. Economy: This facility is characterized by high performance cost ratio . With relatively economical price .its quality is same as that of similar imported products. It is therefore considered as the most economical and practical component product for the braking unit of the inverter .
  4. Adaptable to connection in parallel: It adopts a book-shape design can be installed in a parallel connection with zero clearance .It is recommended that up to 3 units can be connected in parallel .

Outline& Mounting Dimension(Unit:mm)

The function of the braking unit is to divert into a braking resistor the regenerative energy produced in the process of decelerating the motor, converting that energy into heat. Regenerative energy flows from the motor into the inverter DC Bus, manifested as increased bus voltage. The advantage gained using the braking unit is improved braking performance and shorter deceleration time of the load.
The braking unit in the DBU series is applied to consume in the braking resistor the regenerative energy produced in the deceleration process of the motor in the form of heat energy .In this way ,the braking performance of the frequency inverter is improved and the braking time of the frequency inverter  is reduced .

 

Type Mounting Hole Size (mm) Terminal Screw Size Wire Size (mm2)
2015/2030/4015/4030/4045 6 M4 4-6
4220 8 M8 16-36

 

Model Dimensional Drawing Rated braking current Max.Braking Current Chopper Voltage Mounting Hole Size Terminal Weight（kg） Cable(mm)
DBU-2015 A 15A 50A DC380V±5V 6 M4 2.3 4-6
DBU-2022 25A 75A DC380V±5V 6 M4 2.3 4-6
DBU-2030 30A 90A DC380V±5V 6 M4 2.3 6-8
DBU-4030 15A 50A DC630/DC660/DC690V/DC730V±10V 6 M4 2.3 4-6
DBU-4045 25A 75A DC630/DC660/DC690V/DC730V±10V 6 M4 2.3 4-6
DBU-4110 B 60A 200A DC630/DC660/DC690V/DC730V±10V 8 M8 13.2 16-36
DBU-4220 85A 300A DC630/DC660/DC690V/DC730V±10V 8 M8 13.2 16-36
DBU-4300 120A 500A DC630/DC660/DC690V/DC730V±10V 8 M8 13.2 25-50
DBU-6220 85A 300A DC630/DC660/DC690V/DC730V±10V 8 M8 13.2 16-36

Recommended brake assembly matching specification

Inverter Braking Unit Braking resistor
Voltage(V) Motor(KW) Model Qty(PCS) Recommend resistor value Resistor specification Qty(PCS)
220V 0.75KW Built-in 80W200Ω 80W200Ω 1
1.5KW Built-in 200W100Ω 200W100Ω 1
2.2KW Built-in 300W70Ω 300W70Ω 1
3.7KW Built-in 400W40Ω 400W40Ω 1
380V 0.75KW Built-in 80W750Ω 80W750Ω 1
1.5KW Built-in 200W400Ω 200W400Ω 1
2.2KW Built-in 300W250Ω 300W250Ω 1
3.7KW Built-in 400W150Ω 400W150Ω 1
5.5KW Built-in 600W100Ω 600W100Ω 1
7.5KW Built-in 800W75Ω 800W75Ω 1
11KW Built-in 1000W50Ω 1000W50Ω 1
15KW Built-in 1500W40Ω 1500W40Ω 1
18.5KW Built-in 1 2500W35Ω 2500W35Ω 1
22KW Built-in 1 3000W27.2Ω 1500W54Ω 1
30KW 4030 1 5000W19.2Ω 2500W40Ω 2
37KW 4045 1 6000W16Ω 2000W50Ω 3
45KW 4045 2 9600W13.6Ω 2500W54Ω 4
55KW 4030 2 12000W10Ω 2000W60Ω 6
75KW 4045 2 16000W7.5Ω 2500W60Ω 8
Braking Resistor Box Quantity(PCS)
90KW 4030 3 9600W20Ω 3
100KW 4220 1 9600W20Ω 3
132-160KW 4220 1 40KW3.4Ω 1
185-220KW 4220 1 60KW3.2Ω 1
250-315KW 4220 2 40KW4.5Ω 2
315-600KW 4220 3 60KW3Ω 3

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