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RU Series AFE Unit &Regeneration Unit

JiaWei Yang

08/2014

Contents

Part of the product

Product Specifications

Product Introduction

2

1

3

4

Applications of product

Regeneration Unit , or The Energy Feedback Unit , the full name for “special energy feedback unit of frequency converter ”, is a kind of special inverter braking unit, is mainly used for large inertia frequency speed regulation system, help renewable electricity back to the grid produced in the process of the motor reducing the speed,help system achieve rapid braking .

What is Regeneration Unit ？

1. Product Introduction-Basic Concept

2.Tandem energy feedback refers to feedback device and VVVF used in tandem, usually say "active front end rectifier and inverter"AFE（ Active Front End ）

1.Parallel energy feedback refers to feedback device and VVVF used in parallel.

Classification:1. Product Introduction-Basic Concept

1. Product Introduction- Our product

RU Series AFE Unit & Regeneration Unit arise at the historic mo-ment. RU600 was developed and launched in 2013, high-performance, active energy feedback unit 。

It can be used in conjunction with the inverter,can replace the traditional braking resistors, reducing heat generation.The effect of energy-saving is obvious. While minimizing the input side harmonics, Reduce the pollution to the grid in the use process of inverter. With a converter to achieve four-quadrant operation.

1. Product Introduction- Our product

Energy flow diagram

Motor driven

Braking

VVVF

Energy consumption braking mode

Power supply Motor

Energy resistance

VVVF

Energy feedback mode

Power supply

Motor

Regene-ration unit

VVVF

AFE Mode

AFE MotorPower supply

RU600

RU630

Galvanized chassis effective safety ground

Wall-mounted installation program supports and floor

Independent duct design

Efficient design parameters

Pluggable terminal block design. Simplify loading and unloading.

Design of new featur-es and ease of keyb-oard

IPD complete development process

Optimized thermal design model

Power chip thermal assessment program

A common platform of design and manufacture to ensure the quality .

A

Structure Design

C

Guaranteed by design

B

Easy to use

1. Product Introduction- Our product

Contents

Part of the product

Product Specifications

Product Introduction

2

1

3

4

Applications of product

2.Part of the product- The whole system diagram

DC-Bus

Drive and protection circuits

Functional circuits and optical isolation

2.Part of the product -RU600 Wiring Diagram

RES

ET

STOP

RUN

通讯端口

接地PE

A -

A+

多功能输入端子

MC

S/L2

T/L3

R/L1

RU600

多功能开路集电极输出0V~24V/0mA~200mA

RC

RB

X1

X2

Y1

X5

X4

X6

X3 继电器输出触点RA

接地

MCCB

三相电源

AC250V 10mA以上 3A以下

DC30V 10mA以上 1A以下

GND

GND

－

+

PE

变频器

MThe three phase grid

Communication port

ground

ground

Multi-function terminalsInputOthers:

Standard RS485communication terminals ,Modbus protocol support

External expansion card ,Multi-machine communicationinterconnection

Contents

Part of the product

Product specifications

Product introduction

2

1

3

4

Applications of product

3. Applications of product - Typical applications

Elevator light load upward, overload downward ,motor in the state of renewable energy, installation RU600 / RU630 can make Energy back to the grid, to save energy.

3. Applications of product - Typical applications

Energy feedback unit for applications requiring quick stop occasions, such as rolling mills, large planer, machine tools, presses, etc.

3.Applications of product - Other applications

3.Applications of product – applications in spot

R&D Laboratories and production plants in A4

3. Applications of product - Operating Mode

Wiring a

• Automatic switching of the rectifier / feedback operation mode based on the bus voltage change,

• the current flow in both directions, the bus voltage is held constant,

• the power factor is close to 1. • And can be limited to a single direction

rectifier mode, provided for electrical constraints for irreversible system, such as diesel generators.

CH1： Inverter input current waveform when RU600 is not used CH3： AFE input current waveform

3. Applications of product - Operating Mode

Wiring b ：

• When braking the motor, when the bus voltage exceeds the set voltage, the capacitor energy back to the grid. Improve the use of energy-efficient to achieve energy saving， Compared with braking resistor .

CH1： DC-bus voltage. CH3： feedback current

RU630-11kW

3. Applications of product - Operating Mode

RU60

0

Mode Wiring Current control

1 Four quadrant

rectifier

Wiring a Controllable bidirectional flow

2 Single rectifier mode Wiring a Controlled rectifier

3 Single feedback

mode

Wiring b Network side flow

RU63

0

Mode Wiring Current control

1 Single feedback

mode

Wiring b Network side flow

Well,let’s watch a video.

Contents

Part of the product

Specifications and attention

Product Introduction

2

1

3

4

Applications of product

4.Specifications and attention-Naming Rules

Rated input voltage TypePower（ k

W ） Rated output current（ A）

Three-phase AC-380V

RU600-030-3 30 60

4.Specifications and attention- Shape and Size

Product model

Shape Size/mm Installation size/mm Remarks

W H D W1 H1 D1

RU600-030-3 316 595 249 240 573 8RU630-011-3 270 480 150 150 482 9

W =316W1=240

H =595H1=573

D1=249

4-M6×124-M8×14RU600 RU630

4.Specifications and attention- Selection guide

• When using the four-quadrant mode rectifier mode, in accordance with the following selection table :

Inverter power(kW)

7.5 9 11 15 22 30

RU power(kW) 11 30

•Dedicated to energy feedback mode (instead of braking resistor), you can press the selection table:

Inverter power(kW)

≤15 18.5 22 30 37 45

RU power(kW) 11 30

Other products are in development.

• Low harmonic value ： Advanced PWM technology, harmonic value of the current less than 5%.• Power Factor: Real-time monitoring of the grid, to ensure that the power factor> 0.95(usually 0.98).• Group control features: supports two sets of parallel, system expansion, networking group control• Dynamic performance: solve fast transient braking problems, improve system braking performance• Personalized solution:Solve lift type equipment overload problem• Automatic current limiting: Automatically switched according to the external environment and usage• Perfect solution in parallel circulation:reduce energy consumption, improve performance• Perfect voltage loop control strategy:to ensure the DC-bus voltage of frequency converter accurate

and stable

4.Specifications and attention-Technical Feature

4.Specifications and attention-Attention

• Check program ：• First power off • Then check carefully• First outside and then inside

• First control and then power part

The red dashed box forRU600

Three-phasegrid

Inductance IGBTModel

FrequencyConvert

Soft-Drive

Fuse

Switching Power

• Run time, to ensure• Running lights are lit • The control logic is normal • Operating current and the detected current is consistent

• Input and Output terminals are normal

capacitor  

4.Specifications and attention-Attention

Tip1. It is different with the inverter, RU600 require real-time monitoring of the grid voltage.If it shows “LP”,after power on ,firstly check the grid voltage detection line wiring is properly connected to the grid.

Tip2. When using an external inductor,grid detection wire needs to be connected to the grid side.

Tip3. Energy feedback unit and inverter applications in parallel mode, need to use Commonmode Choke in series with the bus, or will cause circulation, affecting the normal use.

Tip4. Power normal, keyboard display properly on RU600, but the bus voltage and bus voltage of the inverter are inconsistent, to confirm the internal fuse is damaged or not.

Tip5. It is different from the inverter, losing uncontrolled rectifier bridge , increasing the grid voltage detection circuit, so we can handle the rest of the abnormal as the inverter.

In my experiment, encountered some problems, and share 5 tips with you:

Figures

Thanks！