AU400 Boost inverters 220V input 380V output

AU400 Boost inverters 220V input 380V output

Product Item:
220V input 380V output 
Powerful current vector control performance        
Perfect protection measures 
Rich functions and stable performance
RS485 serial communication interface
supporting MODBUS international standard communication protocol
  • Product Detail
  • FAQs


AU400 series:(220V input--380V output, 1.5KW-75KW )
AU400 series 220V to 380V frequency converters are specially developed by us for occasions where three-phase power is lacking. With multiple protection methods and excellent driving performance, they can solve the difficulty of users lacking 380V power. The wiring connecting is simple and easy to understand, and the operation is convenient and practical.

Technical Specification

---Universal frequency converter, covering more than 90% applications
---Perfect software and hardware protection function. The
 output frequency can reach to 500Hz, solved the traditional gear limit problem.
---Powerful current vector control performance, low noise,excellent energy-saving effect
---Speed tracking, Instantaneous stop, 0.1S acceleration
 and deceleration, 22G and below are with built-in brake unit
---47 kinds of fault detection protection are set to
 effectively ensure the stable and reliable operation of the system.
---Extensive expansion card options
---Powerful and supports multiple field buses
---Support asynchronous motor control
--- Support user programmable control card (PLC card),and the programming method is fully compatible with
 H1U series PLC

Applications: numerical control machine, Forging Machine,


Input  Voltage
220V 1ph ±15%
Output Voltage
380V 3ph  ±15%
Applicable Power Available
Control Mode
V/F control;SVC/FVC
Overload Capacity
G mode:150% 60s;180% 3s; P mode: 120% 60s; 150%3s
Braking Unit

1.5~22kw: standard built in. 

30~37kw: Optional for built in. 

>37kw, external built in. 



Technical Index



Input voltage

3AC 380~460V±15%

Input frequency



Output voltage

0rated input voltage

Output frequency

V/f control: 0~500Hz

Vector control: 0~2000Hz

Control Features

Control mode

V/f control

Sensorless vector control (SVC)

Close-loop vector control (FVC)

Operation command mode

Keypad control

Terminal control

Serial communication control (Modbus)

Frequency setting mode

Digital setting, analog setting, pulse frequency setting, serial communication setting, multi-step speed setting & simple PLC, PID setting, etc. These frequency settings can be combined & switched in various modes.

Overload capacity

G model: 150%/60s, 180%/3s

P model: 120%/60s, 150%/3s

Starting torque

0.25Hz/150% (SVC); 0.5Hz/150% (V/f), 0Hz/180% (FVC)

Speed control precision

±0.5% (SVC)

Carrier frequency

0.5~16.0kHz, automatically adjusted according to temperature and load characteristics

Frequency accuracy

Digital setting: 0.01Hz

Analog setting: maximum frequency ×0.025%

Torque boost

Automatically torque boost; manually torque boost: 0.1%~30.0%

V/f curve

Three types: linear, multiple point and square type (1.2 power, 1.4 power, 1.6 power, 1.8 power, square)

Acceleration/deceleration mode

Straight line/S curve; four kinds of acceleration/deceleration time, range: 0.1s~6500.0s

Braking unit

1.5~22kW: standard build-in.

30~37kW optional for build-in

>37kW, external braking unit..

DC braking

DC braking when starting and stopping

DC braking frequency: 0.0Hz~maximum frequency, braking time: 0.0s~25.0s

Jog operation

Jog operation frequency: 0.0Hz~maximum frequency

Jog acceleration/deceleration time: 0.1s~6500.0s

Simple PLC & multi-step speed operation

It can realize a maximum of 16 multi-step speeds running via the built-in PLC or control terminal.

Built-in PID

Built-in PID control to easily realize the close loop control of the process parameters (such as pressure, temperature, flow, etc.)

Automatic voltage regulation

Keep output voltage constant automatically when input voltage fluctuating

Control Function

Torque limit

“Rooter” characteristics, limit the torque automatically and prevent frequent over-current tripping during the running process

Wobble frequency control

Multiple triangular-wave frequency control, special for textile


counting control

Timing/length/counting control function

Over-voltage & over-current stall control

Limit current & voltage automatically during the running process, prevent frequent over-current & over-voltage tripping

Fault protection function

Comprehensive protections include over-current, over-voltage, under-voltage, overheating, default phase, overload, shortcut, etc., can record the detailed running status during failure & has fault automatic reset function

Input/output terminals

Input terminals

Programmable digital inputs: DI1~DI6, DI5 can be used as high speed pulse input terminal.

Programmable analog inputs: AI1(0~10V), AI2(compile with both 010V & 420mA).

Output terminals

Programmable digital outputs: 1 relay outputs (another 1 can be extended) 2 open-collector outputs, FM can be set as high speed pulse output terminal.

Programmable analog outputs: AO1, AO2: compile with both

010V & 420mA.

Communication terminals

Standard RS485 communication interface, support MODBUS-RTU communication protocol

Human machine interface

LED display

Display frequency setting, output frequency, output voltage, output

current, etc. Two lines display

Multi-function key

MF.K key, can be used as multi-function key


Ambient temperature

-1040 (>40℃, output derated), without direct sunshine.


90%RH or less (non-condensing)


≤1000M: output rated power, 1000M: output derated

Storage temperature


Q: When will you arrange production?
A: We typically initiate production immediately upon receipt of your payment, provided the item is in stock. Otherwise, please consult with us to confirm the lead time.

Q: What is your accepted payment type?
A: We accept wire transfers, Paypal, Western Union, and Alibaba Trade Assurance. However, and Western Union, along with Alibaba Trade Assurance,  

Q: Which logistic forwarders do you usually work with?
A: We collaborate with reputable logistics providers such as EMS, TNT, UPS, FedEx, and others. You also have the option to designate your own forwarder for shipment.

Q: What voltage range can you support?

· Single 220V input, three-phase 220V output.

· Three-phase 220V input, three-phase 220V output.

· Three-phase 380V input, three-phase 380V output.

· Single-phase 380V input, three-phase 380V output.

· Single 220V input, three-phase 380V output.

· 220V/380V/480V/690V/1140V.

Q: How do you ensure product quality?
A: Our production strictly adheres to the ISO9001 quality control system. Following four rounds of quality inspection and high-temperature testing, we affix the "QA" pass label.

Q: Do you accept OEM business?
A: Yes, we gladly accept OEM and ODM projects with your authorization.

Q: Can I place a sample order?
A: Certainly, we encourage sample orders for quality testing. Mixed samples are also acceptable.

Q: What is the lead time?
A: Sample orders require 3-5 days, while mass production typically takes 1-2 weeks.

Q: Do you offer a guarantee for your products?
A: Yes, we provide an 18-month warranty.

Q: What is your return policy?
A: We accept returns within 30 days of delivery for items that are damaged or defective. Please contact our customer service team to initiate the return process.

Q: How can I track my order?
A: Once your order is shipped, you will receive a tracking number via email. You can use this number to track your shipment through the respective logistics provider's website.

Q: Are your products compliant with international standards?
A: Yes, our products are manufactured to meet or exceed international quality and safety standards. We ensure compliance with relevant regulations and certifications.

Q: Can I customize the specifications of a product?
A: Yes, we offer customization options for certain products. Please reach out to our sales team to discuss your specific requirements and receive a quote.

Q: What do I do if I encounter technical issues with a product?
A: In case of technical issues, please contact our technical support team. They will provide assistance, troubleshooting guidance, or arrange for necessary repairs or replacements.

Q: Is international shipping available?
A: Yes, we offer international shipping. Shipping costs and delivery times vary based on the destination. Please contact us for specific information regarding international shipments.



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