CHIFON ELECTRIC CO.,LIMITED
BEST SERVICE, WE DRIVE!
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Product Specification
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 Selection
One of the easiest issues to address is where and how you are storing the VFD. Make sure that it is cool, clean, and dry. Common issues we see are that the warehouse where a spare VFD is stored has excessive moisture, dust, or even animal problems. The number of issues we have seen when mice or other animals decide to make nests in VFDs is higher than most people realize, and dust and water always present a problem.
Another issue to monitor is temperature. Most inverters are rated to run at temperature similar to 0-40°C. VFDs can be stored at slightly more extreme temperatures than they can be run at, but make sure to consult the manual for your VFDs to find what conditions are recommended.
Electrolytic capacitors are used in almost all low voltage drives, and some medium voltage as well. These capacitors are filled with an electrolytic gel which give them their name. As these capacitors sit without being used, the gel starts to dry up and cause issues. Some medium voltage VFDs use dry film capacitors which do not encounter these problems, so a crucial aspect of servicing your drives is to identify what type of components are inside.
One of the best things you can do for your VFD is to energize it yearly. When you perform the annual preventative maintenance on your other drives, find a way to energize the stored VFD. If electrolytic capacitors sit for more than a year without being energized, you need to make sure to reform the capacitors before putting it in to service, which takes valuable time at what could be a moment when your process is down. Most electrolytic capacitors only have a 5-7 year shelf life, so if you go too long without energizing or reforming capacitors, you may find it is too late to save the VFD without performing actual repairs.
One issue with just reforming capacitors on VFDs is that you can only reform the DC bus capacitors, and capacitors that are on the printed circuit boards are not reformed. That is why the best recommendation is to actually go a step past energizing stored VFDs every year and to actually rotate out equipment at every annual preventative maintenance service to keep all VFDs in their best-running shape.
Although the issues listed above address the biggest issues that come from storing VFDs long term, it is best to have an experienced technician look over VFDs and make sure they don’t see any other obvious problems. It is possible to find instances where parts are taken off of a stored VFD to fix one in service. You might also find damage from other activities in the warehouse, such as equipment getting bumped by forklifts or other equipment. Getting someone who is experienced with VFDs and can identify issues like these will go a long way toward keeping your VFDs ready to go when you need them.
Whether you’re looking at getting a VFD for service, sourcing a spare VFD, or want to explore service on your stored equipment, we can help you make sure your site stays up and running.