CHIFON ELECTRIC CO.,LIMITED
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What is VFD?
A Variable Frequency Drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor. Other names for a VFD are variable speed drive, adjustable speed drive, adjustable frequency drive, AC drive, microdrive, and inverter.
Frequency (or hertz) is directly related to the motor’s speed (RPMs). In other words, the faster the frequency, the faster the RPMs go. If an application does not require an electric motor to run at full speed, the VFD can be used to ramp down the frequency and voltage to meet the requirements of the electric motor’s load. As the application’s motor speed requirements change, the VFD can simply turn up or down the motor speed to meet the speed requirement.
Technical characteristics
| Items | Specification | |||
| Control mode | Control mode | V/F control | Sensorless in open loop | Closed loop vector control |
| Starting torque | 0.5Hz 150% | 0.5Hz 180% | 0.00Hz 180% | |
| Speed adjust range | 0: 50 | 1:100 | 1:1000 | |
| Speed stabilizing precision | ±1% | ±0.1% | ±0.02% | |
| Torque precision | NO | NO | ±5% | |
| Motor type | General induction motor permanent magnet synchronous motor (PMSM ) | |||
| Function design | Highest frequency | General vector control:320Hz V/f control: 3200Hz | ||
| frequency resolution | Digital setting: 0.01Hz Analog setting:maximum×0.025% | |||
| Carrier frequency | 0.5K～16KHz, the carrier frequency can be adjusted by temperature automatically | |||
| Frequency reference setting method | Digital of Control panel, analog AI1, AI2, potentiometer of the control panel, UP/DN control, communication, PLC pulse frequency | |||
| Acceleration./deceleration characteristic | Linear curve and S curve accel. /decal. mode, range of time: 0.0 to 65000S. | |||
| V/F curve | 3 mode: linear, multiple points, N Power | |||
| V/F separation | 2 times separation: totally separation, half separation | |||
| DC braking | DC braking frequency: 0.0 to 300Hz, DC braking current: 0.0% to 100% | |||
| Braking unit | Standard built-in for up to 4T22G (22kw), optional built it for 4T30G～4T110G (30kw to 110kw), external built for above 4T160kw . | |||
| Jog function | Job frequency range: 0.0 to 50.0Hz, the acceleration and deceleration time of Jog | |||
| Configured PID function | Easy to perform pressure, flow, temperature close loop control. | |||
| PLC multiple speed | To achieve 16 segment speed running through built in PLC or terminal control | |||
| Common Dc bus | Multiple drives use one DC bus for energy balance. | |||
| Auto voltage regulation (AVR) | Enable to keep output voltage constant when grid fluctuation | |||
| Overload tolerance capability | G type model: 150% rated current for 60s, 180% rated current for 3s, P type Model: 120% rated current for 60s, 150% rated current for 3s. | |||
| Stall protection control when over-current, over-voltage | Carry out limiting automation for running current, voltage to prevent over current, over voltage frequently | |||
| Rapid current limit function | Minimize the IGBT module broken to protect the AC Drive, maximum reduce the overcurrent fault. | |||
| Torque limit and torque control | "Excavator" characteristics, torque limit automatically during motor running. Torque control is available in close loop vector control mode.
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| Features | Multiple function key JOG button | It can be set for forwarding Jog, reverse Jog, forward/reverse switch | ||
| Timing control function | A total running time and total running time calculating | |||
| 2 group motor parameters | To achieve two motor switchovers freely, the control mode is selectable | |||
| Motor overheat protection | Accepting motor temperature sensor signal input via AI1 terminals. | |||
| Multiple kinds encoder * | Compatible collector PG, differential PG, and rotary transformer Encoder( resolver). | |||
| Command source | Control panel, control terminals, series communication, switch freely. | |||
| Frequency source | Digital setting, analog current/voltage, pulse setting, serial communication, main and auxiliary combination. | |||
| Protection function | The short circuit detects when power is on, input/output phase loss, over-voltage, over-current, under-voltage, overheat, overload protection. | |||
| Environment | Application site | Indoor, free of exposure to sunlight, no dusty, no corrosive, no inflammable gas, no oil and water vapor, and water dipping | ||
| Altitude | Lower 1000m | |||
| Environment temperature | -10℃～+40℃, power derated for 40～50℃, rated current derated 1% for 1℃ increasing. | |||
| humidity | Less than 95%, no water condense. | |||
| storage | -40～+70℃ | |||
Product advantages
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