ACH200 Medium Voltage AC Drive Inverter Overview
ACH200 series products are the third generation of high-performance high-voltage vector-type AC drive made by VEICHI Electric on years of technical accumulation and in-depth market research and demand analysis, which adopts mature power unit series technology, DSP+FPGA dual core control, vector control algorithm, to deliver high control accuracy, fast dynamic response, large low frequency output torque etc. It is widely used in fans, pumps, compressors, belt machines, ball millscrushers and other load occasions, providing the drive core for energy saving and emission reduction to meet the diversified needs of industrial enterprises.
High-performance control platform
DSP+FPGA dual-chip control structure, control algorithms implemented by DSP, and external signals such as IO, bus and encoder processed by FPGA in parallel. High-speed and high-precision loop control ensures the excellent dynamic response capability and control accuracy.
Start with high torque and low frequency
Open-loop vector control: 0.5Hz 150% starting torque.
Closed-loop vector control: 0Hz 200% starting torque.
200% rated torque output at 0Hz for IPM motors under open-loop control by highfrequency signal injection.
Excellent low frequency control performance
Dead-time compensation technology
Current waveform is nearly sine wave at low frequency.
Low-frequency oscillation suppression algorithm
Motor resonance will not be caused at low frequency.
Stall protection for full frequency
Track rotational speed accurately regardless of the motor speed states. (forward, reverse, still).
The whole process from starting to targeted state can be completed in shorter than 200ms with fast response.
Remanent voltage is larger at shundown of large inertia equipment, so its remanent and phase can be estimated after restart, and then enter rotary preexcitation and acceleration.
Master-slave control technology
CAN or fiber optic communication are adopted to ensure real-time communication and output consistency among multiple machines regardless of mechanical load and fluid load.
Perfect harmonic-free design
Multi-phase shift rectification technology on the input side
Grid-side THD value smaller than 2%.
Multi-level technology on the output side
Motor-side THD value smaller than 2%.
Multiple unit bypass methods
Parallel symmetric bypass.
Neutral offset bypass.
Standard with IGBT electronic bypass and optional with relay mechanical bypass.
Multiple extension modes supported
Functional extensions according to actual requirements including IO extension, bus extension, encoder extension, etc,.
Cabinet Structure ACH200 Series Medium Voltage AC Drive Inverter
Applications Inverter：
Metallurgy
Sintering main exhaust fans,converter dedusting fans, blast furnace blowers, sulphur dioxide blowers, circulating coolers, combustion fans, slag flushing pumps, phosphorus removal pumps, etc,.
Electricity
Water feeding pumps, condensate pumps, water circulating pumps, air feeders, induced draft fans, primary fans, secondary fans etc,.
Mines
Main fans, gas extraction pumps, compressors, belt machines, ball mills, crushers, etc,.
Oil and Gas
Oil transporting pumps, water injection pumps, compressors, other fans and pumps, etc,.
Chemistry
Oil transporting pumps, water injection pumps, compressors, booster pumps, etc,.
Building Materials
High-temperature fans at kiln end, exhaust fans at kiln head, coal mill fans, cement mill circulating fans, dust exhaust fans, ball mills, crushers, etc,.
Municipal administration
Aeration blowers, water supply pumps, water feeding pumps, induced draft fans, air feeders, etc,.
Others
Wind tunnel test fans, shore power supplies, internal mixers etc,.
Advanced interfere-free switching technology
Phase-locked technology enables motor to start and run without interfere between power frequency and variable frequency, so it’s suitable for switching between multi-gear water pumps. The impact current of the switching process does not exceed 1.5 times of the rated motor current.
Ride-through design between low and high voltage
High adaptability to power grid fluctuations
85%-110% full-load output.
65%-85% derated output.
110%-120% derated output.
Motor nonstop during instantaneous power cut for long running
Multiple and comprehensive protections
Multiple and comprehensive protections
Remote diagnosis is supported. After being authorized by clients, Veichi staff can check fault records, system parameters and running data to locate faults quickly, improving processes and efficiency on the remote server on the client’s side via VPN.
