General Variable Frequency Drive

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Brief Introduction
The general variable frequency drive (VFD) is the electrical control equipment utilizing the frequency conversion technology and microelectronic technology to control the AC motor via changing the frequency of working power of motor. It is basically composed of rectifier (AC to DC), smoothing unit, inverter (DC to AC), brake unit, driving unit, detecting unit, microprocessing unit, etc.

The equipment adjusts the voltage and frequency of the output power via the breaking of internal IGBT (insulated gate bipolar transistor), and provides the required power supply voltage accoridng to the actual need of motor, thus reaching the purpose of energy saving and speed adjusting. In addition, the general VFD has many protection functions such as overcurrent protection, overvoltage protection, overload protection, etc. With the continuous improvement of industrial automation, it has a very wide range of application.

Functions and Features
1. The product adopts the SVC current vector control mode, and is optional with V/F control mode.
2. It is configured flexibly with multi-node setting for V/F curve.
3. The equipment is also avilable with motor parameters static self-turning function.
4. It is outfitted with the multifunctional programmable input port, allowing for programming relay output.
5. The general variable frequency drive is built with PID regulator internally which is conveniently for customers to carry out simple closed loop control involving flow, pressure, etc.
6. The overcurrent and overvoltage monitoring protection can protect the product and the equipment of customers to the fullest extent.
7. The product takes advantages of the unique adaptive control technology and pulse width modulation technology to obtain the optimum control performance.
8. Designed with compact structure and small volume, it has dependable peformance.
9. The product adapts to the large range wide power grid change design, especially the special occasions with low voltage.

Application
The general variable frequency drive is alrgely applied into the fields concerning machinery, textile, printing and dyeing, packaging, printing, ceramics, pharmacy, food, production line, etc.

Specification

Item		Standard specification
Input	Input voltage	Single phase 220V, three-phase 380V, 50Hz/60Hz
Input	Allowable variable value	Voltage: -20% ~ 20％ Voltage unbalance rate: <3%
Output	Rated voltage	0 ~ 220V/0 ~ 380V
Output	Frequency range	0Hz ~ 400Hz
Motor	Applicable motor power	0.4kW ~ 630kW (0.5HP ~ 840HP)
Control function	Modulation mode	Optimizing space voltage vector PWM
	Control mode	Sensorless vector control
	Frequency accuracy	Digital setting: Maximum frequency × ±0. 01 Analog setting: Maximum frequency × ±0.2%
	Frequency resolution	Digital setting: 0.01Hz Analog setting: Maximum frequency × 0.1%
	Torque boost	Automatic torque boost, manual torque boost 1%~30.0% (V/F Mode)
	V/F curve	Linear V/F curve, square V/F curve, User defined V/F curve
	Built-in PID	It facilitates forming closed loop control system, and is suitable for pressure and flow control.
	Multi-speed operation	Achieving multi-speed operation via built-in PLC or control terminal
Sensorless vector control	Torque characteristic	Outputting 150% rated torque at 1Hz, rotating speed stabilization accuracy of 0.1%
Sensorless vector control	Motor parameter automatic reading	Indentifying motor parameters automatically in the case of the motor stopping running completely to get optimum control effect
Running function	Running command channel	Presetting via operating panel, presetting via control terminal, presetting via serial port (The three ways can be switched.)
	Frequency setting channel	Presetting via keyboard potentiometer, presetting via ▲ and ▼ keys on the keyboard, presetting via functional code digits, presetting via serial port. Presetting via terminal UP/DOWN, presetting via analog signal, presetting via combination
	Switch input channel	Forward and reverse rotating command, 6-way programmable switching value input to set at most 30 kinds of functions
	Analog input channel	2-way analog signal input optional with 0 to 20mA and 0 to 10V
	Analog output channel	Analog signal output optional with 0 to 10V and 0 to 20mA
	Switching value output channel	3-way programmable open collector output, 1-way relay output signal
Operating panel	LED digital display	Displaying preset frequency, output voltage, output current, etc.
Protection function		Overcurrent protection, overvoltage protection, undervoltage protection, overheating protection, overload protection, etc.

Related Names
Frequency Converter Supplier | Frequency Motor Control | Industrial Control Device

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