AC300 Series Frequency Inverter
  • AC300 Series Frequency Inverter

AC300 Series Frequency Inverter

High-performance vector general platform & brand-new motor control algorithm
Integrated PMSM & AM drive & comprehensive open-loop and closed-loop
Book design saves installation space
Up-down straight air-duct design & DC fan cooling

AC300 Series High Performance Inverter Overview

VEICHI AC300 series inverter is the product developed on the platform of VEICHI latest high-performance vector technology. It not only adopts the internationally leading filed-orientation vector control technology, which is compatible with AM and PMSM control, but also makes the most reasonable layout of components under the premise of high-performance and high-reliability, so as to achieve the book narrow-body design. Besides, to strengthen the usability and industrial specialization, it is equipped with rich extension interfaces and new extension accessories, realizing the features of high performance, high reliability, high power density and high usability.

AC300 VFD features

  1. High-performance vector universal platform, brand new motor control algorithm.
  2. Synchronous and asynchronous drives are integrated, open loop and closed loop are comprehensive.
  3. Software and hardware modular design requirements, strong expansion capabilities.
  4. Rich interface accessories, covering various applications.
  5. Book design, save installation space.
  6. Optimize the convenient keyboard design, support the new external keyboard.
  7. The upper and lower straight ventilation ducts are designed to dissipate heat by DC fans.
  8. PCB spraying three-proof paint to ensure product stability and reliability.

New appearance, design, and aesthetics are integrated

  1. Book-style narrow body structure design reduces the volume by 60%.
  2. Up and down straight-through heat dissipation, multiple inverters can be installed side by side, greatly reducing the volume of the electrical cabinet.
  3. New keyboard design, simple appearance, support dual keyboard display.

Make it simple, save more than time

  1. European-style terminal, simple wiring, improve efficiency.
  2. Domestic general parameter arrangement, optimized operation buttons, easy to use.
  3. Dedicated upper debugging software VCACSoft Ver1.5 reduces debugging time and difficulty.

Ingenious control algorithm

  1. Drive a variety of loads: support synchronous, asynchronous, electric spindle, AC servo, and other motors.
  2. Control mode: One machine covers V/F mode, frequency separation, open/closed-loop vector, free selection of speed and torque.
  3. Motor self-learning: self-learning algorithm, accurate and consistent movement, and static.
  4. High-speed field weakening control: high bandwidth current vector, 12 times the field weakening high precision output.

Hardcore style, reliable protection

  1. Software suppression function: over-current, over-voltage fast response, stable suppression.
  2. High starting torque: large low-frequency torque, ultra-low speed, and stable load operation without alarm.
  3. Short-circuit detection to the ground: Realize protection from the inverter to the motor.

Exquisite structure, handy in harsh environments

  1. New structural design: separate design of device and air duct, closed design on both sides of the machine, improve the machine's environmental resistance.
  2. Wide-tooth high-wind heat dissipation: wide-tooth surface high-efficiency heat dissipation, high-volume, and high-speed cooling fan to ensure no derating at high temperatures in the full power section.
  3. Long-life design: Strict selection of high-quality parts, scientific layout, effectively avoid the occurrence of excessive-high temperature and extend the product life cycle.

Everything is available, with rich expansion capabilities

  1. SPI expansion port, automatic identification of expansion card, high-speed channel optimization efficiency.
  2. Abundant extensions: support multiple types of sub-expansion cards, diverse functions, suitable for multiple occasions.

Do more with less, and new debugging tools came into being

  1. Host computer debugging: VCACSoft Ver1.5 is easy to operate, configure parameters, and provide customers with flexibility.
  2. Firmware upgrade: the built-in software can be directly upgraded and replaced online, reducing maintenance and replacement costs.
  3. Traditional serial port: commonly used RS485 interface or field bus for data exchange.

Industrial Applications for AC300 Series Frequency Inverter

Application: Mining, CNC, Hoisting, chemical engineering, ceramics, petroleum and petrochemical, municipal engineering, printing and packaging, wire and cable and other industries and equipments.

Related Applications of AC300 Frequency Drive

Application of AC300 in Synchronous Drive Control System
Application of AC300 in Synchronous Transmission Control System
Application of AC300 frequency converter in water supply industry
Application of AC300 General Frequency Inverter on Power-Discharging Rack
AC300 series inverter used on stereo garage


Projects Specifications
Power range Single phase 220V 50/60Hz 0.75kW - 220kW
Three phase 220V 50/60Hz; 0.75kW - 220kW
Three phase 380V 50/60Hz 0.75kW - 710kW
Input Voltage,frequency 3-phase 380V, 50/60Hz
Allowed fluctuation range Voltage unbalance ratio:<3%; Frequency fluctuation: ±5%;Distortion rate: conform to IEC 61800-2
Switching impulse current Less than rated current
Power factor ≥0.94 (DC reactor)
Frequency inverter efficiency ≥96%
Output Output voltage Output under rated conditions: 3-phases, 0~input voltage value, deviation is less than 5%
Output frequency range G mode: 0~600Hz
Output frequency accuracy ±0.5% of the maximum frequency
Overload capacity G model: 150% rated current for 1min; 180% rated current for 10s; 200% rated current for 0.5s
The main control performance Motor control mode V/F control without PG, vector control without PG, V/F control with PG, vector control with PG
Modulation method Optimized space vector PWM modulation
Carrier frequency
Speed control range Vector control without PG, rated load 1:100; Vector control with PG, rated load 1:1000
Speed accuracy in steady Vector control without PG: ≤ 2% rated synchronous speed; Vector control with PG: ≤ 0.05% rated synchronous speed
Starting torque Vector control without PG: 150% rated torque at 0.5Hz; Vector control with PG: 200% rated torque at 0Hz
Torque response Vector control without PG: <20ms; Vector control with PG: <10ms
Frequency accuracy Digital setting: maximum frequency × ± 0.01%; Analog setting: maximum frequency × ± 0.2%
Frequency resolution Digital setting: 0.01Hz; analog setting: maximum frequency × 0.05%
Basic functions DC braking capability Starting frequency: 0.00~50.00Hz; Braking time: 0.0~60.0s; Braking current: 0.0~150.0% of rated current
Torque boost Automatic torque boost: 0.0%~100.0%; Manual torque boost: 0.0%~30.0%
V/F curve Four methods: linear torque characteristic curve, self-setting V/F curve, drop-torque characteristic curve (1.1~2.0th power), squared V/F curve
Acceleration and deceleration curves Two methods: linear acceleration/deceleration and S-curve acceleration/deceleration
Four sets of acceleration and deceleration time, time unit-0.01s, longest time-650.00s
Rated output voltage Using the power supply voltage compensation function, the rated voltage of the motor is 100%, which can be set in the range of 50 to 100% (the output cannot exceed the input voltage)
Automatic voltage adjustment When the voltage fluctuates, the output voltage is automatically maintained
Automatic energy-saving operation Automatically optimize output voltage according to load in V/F control mode to achieve energy-saving operation
Automatic current limiting Automatically limit current during operation to prevent frequent overcurrent fault tripping
Instant power-off processing Uninterrupted operation through bus voltage control when instantaneous power-down,
Standard function PID control, speed tracking and restart after power-down, jump frequency, frequency upper and lower limit control, program operation, multi-step speed, RS485, analog output, frequency pulse output
Frequency setting channel Keypad digital setting, analog voltage/current terminal AI1, analog voltage/current terminal AI2, communication given and multi-channel terminals selection, main and auxiliary channel combination, expansion card, can be switched by various ways
Feedback input channel Voltage / current terminal AI1, voltage / current terminal AI12, communication given, low-speed pulse input PUL, expansion card
Run command channel Operation panel given, external terminal given, communication given, expansion card given
Input command signal Start, stop, forward/reverse, jog, multi-speed, free stop, reset, acceleration/deceleration time selection, frequency setting channel selection, external fault alarm
External output signal 1 relay output, 1 collector output, and 1 AO output can be selected as 0~10V or 4~20mA or frequency pulse output
Protection functions Over-voltage, under-voltage, current limit, over-current, overload, electronic thermal relay, over-heat, over-voltage stall, data protection, fast-speed protection, input and output loss phase protection
LED display Single-line 5-bit digital display Monitors 1 frequency inverter status value
Dual-line 5-bit digital display Monitors 2 frequency inverter status value
Copy of parameters Can upload and download the function code information of the frequency inverter to achieve fast copy of parameters
Condition monitoring All parameters of monitoring parameter group such as output frequency, given frequency, output current, input voltage, output voltage, motor speed, PID feedback, PID given quantity, module temperature, etc.
Faults alarm Over-voltage, under-voltage, over-current, short circuit, loss phase, overload, over-heat, over-voltage stall, current limit, data-damaged protection, current operation fault, historical faults
Surroundings Installation location The altitude should be less than 1000 meters and the rated power is reduced to use when the altitude is above 1000 meters, and the depreciation is 1% for every 100 meters increment. No condensation, icing, rain, snow, haze, etc., solar radiation is below 700W/m2, air pressure is 70~106kPa
Temperature, humidity -10~+50°C, the rated power is reduced to use when the temperature is above 40°C, maximum temperature is 60°C (no-load operation)
5%~95%RH (non-condensing)
Vibration 9~200Hz, 5.9m/s2(0.6g)
Storage temperature -30~+60℃
Installation mode Wall-mounted type, cabinet type
Protection class IP20
Cooling method Forced air cooling


Leave a message
Leave a message