Veichi Universal Variable Frequency Drive VFD AC Voltage Converter

• Application: High-performance Transducer, Three Phase Transducer, General Transducer
• Output Type: Triple
• Principle of Work: Vector Control Transducer
• Switch Mode: PWM Control
• Main Circuit Type: Voltage
• Voltage of Power Supply: Low Voltage Variable-Frequency Drive
• Model NO.: VEICHI AC70
• Link of Transformation: AC-DC-AC Variable-Frequency Drive
• Nature of DC Power: Voltage Variable-Frequency Drive
• Function: Simple Type, Textile Special, Constant Torque Universal Type
• Brand: Veichi
• Transport Package: Carton Box/Wood
• Trademark: VEICHI
• Origin: Suzhou, China
• Production Capacity: 600, 000 PCS/Year

Product Description

>>>  AC70 Series Frequency Inverter Overview

The AC70 series general-purpose inverter adopts an open-loop vector algorithm and modular design to realize high-performance and high-precision motor drive control. The product also has an independent air duct, which can effectively prevent dust from entering the circuit board. At the same time, the thickened three anti-paint protection makes it more environmentally adaptable.

>>> AC70 universal inverter

1. High-performance open-loop vector control algorithm.
2. Flux algorithm, modular design.
3. Good grid adaptability and wide grid voltage range.
4. Abundant software functions to meet various needs.
5. High reliability and high environmental adaptability.
6. Easy to install, easy to debug, and easy to maintain.
7. Anti-dust, independent air duct design.
8. PCB board thickened with three anti-paint treatment.

>>>  Various ways to meet different needs

1. V/F control: It is used for all variable speed controls that do not require fast response and high-precision speed control, and where multiple motors are connected with one inverter.
2. No PG vector control: used for all variable speed control, especially when high-precision speed control is required, the torque response is fast and the motor can also obtain a larger torque when running at low speed.

>>>  Reliable strength, provide control strategy

1. It has two self-learning methods of static/rotating to obtain accurate electrical parameters of the motor.
2. Under light load, one inverter can start with multiple motors to track and start, optimize the tracking function of software and hardware, and the accuracy of speed tracking is higher.
3. Effectively reduce the noise of the motor and suppress the interference of the inverter to external equipment.
4. There is no need to add peripheral braking resistors and other accessories to achieve a rapid braking effect, which can effectively suppress the rise of bus voltage during deceleration and avoid frequent overvoltage faults.

>>> Rich functions, covering industry applications

1. The new generation of energy-saving operation can realize the operation of the induction motor, and calculate the output voltage according to the load to achieve the purpose of energy-saving. It is mostly used on the occasion of energy-saving transformation.
2. The standard swing frequency is suitable for occasions where the swing frequency control is required for textiles and chemical fibers. The swing frequency amplitude, speed, and frequency can be set freely.
3. A variety of PID control, divided into ordinary PID and pressure closed-loop dedicated PID, wider application scope, and stronger industry pertinence.

>>> High quality, use a variety of harsh environments

1. To cope with sudden changes in load, the automatic current-limiting technology makes the frequency automatically adjusted to prevent the frequency converter from reporting faults frequently and affecting production efficiency.
2. Wide power grid voltage working range, professional "momentary stop, and non-stop" algorithm, to accurately compensate for the momentary power failure of the power grid.
3. Thickened PCB three-proof paint treatment: anti-moisture, anti-salt spray, anti-mold, and extend the life of the board.

>>> Stable communication, adapt to various common protocols

1. Standard RS485 communication, support MODBUS-RTU, support PROFIBUS-DP communication protocol.
2. It is convenient to realize the connection between the upper computer and the PLC and realize remote monitoring.

>>> Compact structure, reasonable layout, fast heat dissipation

1. The whole series of independent air duct design, the electronic components of 22KW, and below models are completely sealed and not windproof, effectively preventing pollutants from entering the electronic component area, improving the protective effect of the inverter, and adapting to various on-site environments.
2. The whole series adopts DC fans with long service life and easy replacement. It can be installed through penetration, more adaptable.
3. The cabinet machine adopts the upper and lower structure design, and the standard distribution reactor is installed in the base so that the heat dissipation effect is better, the service life of the whole machine is improved, and it is more reasonable and beautiful without limitation.

>>> Industrial Applications for AC70 Series Frequency Inverter

Applications:Fans and pumps, air compressors, wire drawing machines, injection molding machines, ball mills, machine tools, industrial washing machines, lifting industries, and other industries and equipment.

>>> Specifications

Technical  Specification	Items	Description
Power range	Single-phase 220V, Three-phase 220V	0.4kW~220kW
	Three-phase 380V	0.75kW~710kW
	Three-phase 660V	7.5kW~710kW
	Three-phase 1140V	37kW~710kW
Power Input	Voltage, frequency	single phase 220V, 3 phase, 220V, 380V, 660V and 1140V
	Allowable fluctions	Voltage: ±15%; frequency±5% Distortion of voltage to confirm to IEC61800-2
	Closing striking current	Less than rated current
	Power Factor	=0.94( integrated DC reactor)
	Efficiency	=96%
Power Output	Output Voltage	3 Phase, 0~Input voltage, tolerance less than 5% in standard rating condition
	Frequency control range	G type: 0 to 400Hz, P type: 0-400Hz, Z type: 0-400Hz, L type: 0-400Hz, H type: 0-3000Hz.
	Output frequency accuracy	±5% of maximum frequency
	Overload tolerance	Z type: 150% rated current for 60 sec, 180% rated current for 30 sec, 250% rated current for instantaneous G, H, L type model: 150% of rated output current for 60 sec,180% of rated current for 10s, 2 00% of rated current for instantaneous P type: 120% rated current 60 sec, 150% rated current for instantaneous
Key Control Performance	Motor control mode	Open loop sensorless vector control without PG, V/F control
	Control system	Optimized Space Vector PWM Modulation
	Carrier frequency	0.6~ 15kHz, Randomly-modulated carrier
	Speed control range	OLV without PG with rated load: 1:100,
	Stable speed control accuracy	OLV without PG: less than 1% rated synchronous speed
	Torque response	OLV without PG control mode: =20ms
	Frequency accuracy	Digital inputs: maximum × ±0.01% Analog inputs: maximum × ± 0.2%
	Frequency setting resolution	Digital inputs: 0.01 Hz Analog inputs: 0.5% of maximum output frequency
Standard Function	DC Baking	Starting Frequency: 0.00 to 50.00Hz, Braking Time: 0.0 to 60.0s Braking current: 0.0 to 150% rated current
	Torque boost	Auto torque boost:0.0% to 100% Manual torque boost: 0.0% to 25%
	V/F curve	5 kinds curve programmable setting:1 user setting, 1 of linear characteristic torque curve setting. 3 kinds derating torque setting( 1.5 power, 1.7 power, 2.0 Power curve )
	ACC/DEC curve	Two kinds curve: line Accel/Decel, S curve Accel/Decel. 4 Aceel/Decel time unit is 0.1s, maximum time 6500.0s
	Rated output voltage	Power voltage compensation is available, setting range from 50 to 100%( rated voltage), the output voltage can not over than input
	AVR(auto voltage regulation)	Automatic voltage regulation for keeping output voltage stable when fluctuation of grid
	Auto energy saving running	Optimized the output voltage according the load to achieve energy saving
	Auto current limit	Auto current limit during running mode to avoid trip occurs frequently
	Momentary Power Loss with no stop running function	To achieve continuous running with regenerative enery and DC bus voltage regulation when momentary power loss
	Standard function	PID control, Carrier frequency adjustable, current limiter, Speed Search, Momentary Power Loss restart,8 Step Speed (max), 3-wire Sequence, Slip Compensation, Frequency Jump, Upper/lower Limits for Frequency Reference, DC Injection Braking at Start and Stop, Energy Saving Control, Modbus Comm RS485, Fault Restart, job function, Cooling Fan on/off Switch, timing stop, high pulse output, programmable auto running, swing frequency, counter, frequency arriving detect and frequency lever detect.
	Frequency Setting Methods	Keypad digital setting, potentiometer of keypad, analog voltage terminal VS1, analog voltage terminal VS2, analog current terminal AS, RS485 communication and multiple terminal, main and auxiliary composition setting.
	Feedback Input Channel	Voltage terminal VS1, VS2, current terminal AS, communication , and pulse input PUL
	Running command channel	Keypad given, external terminal given, communication given
	Input command signal	Start, Stop, FEW/Reverse, Job, Multiple speed, free stop, Reset, Accel/Decel time, Frequency set point channel, External fault
	Output signal	2 Photo coupler relays: 2 (24 V, up to 50 mA) 1 Contact relays: 1 (250 Vac/up to 1 A, 30 Vdc/up to 1 A) 0-10V output, 4 to 20mA output Frequency pulse output
Protection function		Overvoltage, under voltage, current limit, over current, overload, electric thermal relay, overheat, Stall prevention, parameter lock
Keypad Display	LED Display	One line digit-segments LED display to monitor 1 running status; Double line digit-segment display to monitor 1 running status.
	Parameters copy	Upload and download parameter code to achieve easy copy
	Monitor Function	Output frequency, Frequency set point, Out current, Output voltage, motor speed, PID feedback value, PID given setting, IGBT module temperature, I/O terminal status.
	Alarms	Overvoltage, under voltage, over current, short circuit, phase loss, over load, over heat, stall prevention, current limit, parameter lock damage, running status at present alarm, past trip alarm
Environment	Installation site	Indoor, Altitude should less than 1000m, Free corrosive gases and direct sunlight
	Running Temperature, humidity	-10~+40°C ( wall mounting), 20% to 95% RH (No condensation)
	Vibration	Less than 0.5g when frequency less than 20Hz
	Storage Temperature	-25-+65°C
	Installation mode	Wall-mounted mode, floor stand cabinet install
	Protection Degree	IP20
	Cooling Method

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