AC Three Phase 660V 1140V 3300V Converter Frequency Inverter Medium
Voltage Inverter For Motor
Medium Voltage Inverter description
The all-compatible drives are designed to provide customers across
industries and applications with unprecedented levels of
compatibility and flexibility. They are customized to meet the
precise needs of industries such as oil and gas, mining, metals,
chemicals, cement, power plants, material handling, pulp and paper,
sawmills, marine, water and wastewater, food and beverage and
automotive.
They control a wide range of applications such as cranes,
extruders, winches, winders, conveyors, mixers, compressors,
centrifuges, test bences, elevators, extruders, pumps and fans.
Medium Voltage VFD Feature
1.Substantial reduction of harmonic current on power source side.
2.Total inverter efficiency as high as approximate 97%.
3.Start/stop operation, parameter setting, fault display and data
monitoring are performed on the touch panel with simple loader
functions.
4.Fault diagnoses are easily performed.
5.Dry-type input transformer is adopted.
6.Higher equipment reliability is achieved by reducing the number
of inverter cells by using a single-phase,3-level inverter,etc..
7.Wide range of voltage fluctuation tolerance.
8.Over load tolerance capability(G type model: 150% rated current
for 60s, 180% rated current for 2s,P type Model: 120% rated current
for 60s, 150% rated current for 3s.)
9.Vector control with a speed sensor is available (as an option)
for equipment having high speed and torque accuracy requirements.
(option).
10.Simple, built-in auto-tuning functions facilitate testing and
adjustment.
The main advantages of the three-level inverter:
1) Simple structure and small size.
2) Compared with the two levels, the device can achieve 2 times the
voltage output with the same voltage level.
3) Reduce the common mode voltage of the motor
4) Reduce common mode interference to the power grid.
5) It is convenient to realize the two-way flow of energy and the
four-quadrant operation of the motor.
6) The output du/dt is reduced by half compared to the two levels.
7) Compared with the two levels, the number of phase voltage output
levels increases and the output harmonics decrease.
Technical specification
Items | Specification |
Control mode | Control mode | V/F control | Sensorless Vector control 1 | Sensorless Vector control 2 | Close loop vector control |
Starting torque | 1Hz 150% | 0.5Hz 150% | 0.25Hz 150% | 180% under 0Hz |
Speed adjust range | ** | 1:50 | 1:200 | 1:500 |
speed stabilizing
precision | ±0.1% | ±0.3% | ±0.05% | ±0.02% |
Torque precision | NO | NO | Yes | Yes |
Motor type | General induction motor,permanent magnet synchronous motor (PMSM) |
Function
design | Output volage | 3 electric level with low harmonic |
Highest frequency | General vector control :400Hz V/f control:4000Hz |
frequency resolution | Digital setting: 0.01Hz analog setting: maximum×0.025% |
carrier frequency | 0.5K～16KHz, the carrier frequency can be adjust by temperature
automatically |
Frequency reference setting method | Digital of Control panel, analog AI1, AI2, potentionmeter of
control panel, UP/DN control, communication, PLC pulse frequency |
Accel./decel. characteristic | Linear curve and S curve accel. /decel. 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 | Built in braking unit up to 15kw, optional is 18.5kw to 75kw,
external built in for above 93kw. |
Jog function | Job frequency range: 0.0 to 50.0Hz, the accel. and decel. time of
Jog |
Configuration PID | 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 inverters use one DC bus for energy balance. |
Auto voltage regulation (AVR) | Enable to keep output voltage constant when grid fluctuation |
Over load tolerance capability | G type model: 150% rated current for 60s, 180% rated current for
2s,
P type Model: 120% rated current for 60s, 150% rated current for
3s. |
stall control when over current, over voltage | Carry out limiting automation for running current, voltage to
prevent over current, over voltage frequently |
Fast current limit function | minimize the IGBT module broken to protect the inverter, maximum
reduce the over current fault. |
Torque limit and torque control | "Excavator" characteristics , torque limit automatically during
motor running. Torque control is available in close loop vector
control mode. |
Items | Specification |
features | friendly interface | Display Hello when power on. |
Multiple function key MK.F button | It can set for Forward Jog, reverse Jog, forward/reverse switch |
Timing control function | A total running time and total running time calculating |
Motor over heat protection | Accepting motor temperature sensor signal input via AI1 terminals. |
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 | Short circuit detect after power on, input/output phase missing,
over voltage, over current, under voltage, over heat, over load
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℃ |
Application:
Construction Materials
1.Kiln head cooling fans.
2.Kiln tail heating fans.
3.Grinders.
4.Cement rotary kilns.
Petrochemical Mining
1.Catalytic cracking unit.
2.Hydrogenation compressor.
3.Oil and gas transmission device.
4.Blowers/pumps/pelletizer.
