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MaxWell Medium-Voltage Variable Frequency Drive 3.3~10kV | China Suppliers & Factory for Industrial Applications
Features
Multi-pulse rectification using transformer phase shift technology, 30 pulses for 6kv systems and 48 pulses for 10kv systems.
Meets IEEE519-2014 standard.
Input filterless.
The input transformer phase shift technology combined with cascade modules provide the reactive power required by the motor with an input power factor of up to 0.96. After the motor has passed through the high voltage inverter, no reactive power compensation equipment is required.
Module-cascaded technology, H-bridge inverter, module output superimposed to form multilevel, output perfect sine wave to ensure the motor work in better condition. It is adaptable to new and old motor.
Efficiency up to 97%, better electromagnetic design for phase shifting transformers to reduce losses, and IGBT uses international first-tier brand.
Output voltage fluctuation range -15%-+15%, frequency fluctuation -10%-+10%. Within the fluctuation range it ensures the output rated voltage by output injection harmonic control. It can work with the minimum voltage -45%. When the grid momentarily loses power, the high voltage frequency converter will enter the momentary power loss non-stop function to maintain the motor working, and if the grid is recovered before the system energy storage is depleted, the system will continue to work.
The mains input, output, control power input and communication signals are protected against lightning.
The control system, electrical system, power module, fan system and detecting unit adopt modular design, being highly reliable, easy to maintain and easy to operation.
10KV 1-2MW, one design for the structure size in the power section, 10KV 1-2.25MW, 10KV 200KW-1 MW and 6KV 185KW-0.8MW. Small in size and space saving.
The phase shifting transformer is switched to the grid on the high voltage side after the transformer has output a normal voltage by means of a low voltage soft start. The soft start ensures that the phase shifting transformer is switched to the grid without inrush current.
The power supply of the control system adopts a modular design and a dual redundant power supply, with one from low voltage and one from high voltage. The core memory chip inside the control system is powered by a super capacitor to ensure the operation of data storage when the system is powered down.
Depending on the motor applications, VF control, vector control and direct torque control (DTC) are available to suit various motor loads.
Motor overcurrent protection, output overload protection, input overvoltage and overcurrent protection, phase shifting transformer overheat protection, communication fault protection, power unit fault, output short circuit protection, IGBT overcurrent protection, operation gate open protection, etc.
It has interfaces for RS485, analogue input, analogue output, digital input, digital output, encoder input, power control, power output, high voltage circuit breaker control and detection, emergency stop, etc. to meet a wide range of applications.
Independent duct design, adaptable to various industrial applications. Interference-free fibre optic control signals. Module control adopts DSP digital control.
DSP+FPGA architecture is used to complete motor algorithms, logic control, fault handling, SVPWM regulation, communication, signal processing and other functions to perform motor control accurately, quickly and reliably.
High-voltage frequency converter can achieve synchronous motor or asynchronous motor soft start, with motor starting from 0HZ and gradually running to the grid frequency of 50HZ. Then the motor switches from the frequency conversion state to the industrial frequency grid, with the switching process smooth and there is no impact current on the motor so as to ensure the safe operation of the motor.
With a modular design, each part is a separate module, and it only needs to handle the corresponding module during maintenance, allowing the ventilation dust screen to be replaced or cleaned under normal operation.
Protection class IP30; pollution class II. It meets start-up at -15℃ and can work at a maximum temperature of 55℃; Storage and transport temperature -40℃ to +70℃; The complete machine passes the Class III road transport test; Power module, control system, detection unit, electrical system and other modules pass the 0.6m drop test and vibration test.
Basic Parameters
| Power Input | |
| Input voltage |
Voltage class 6KV or 10KV, output rated power is output when voltage fluctuation range is within -10%~+10%. Output power is derated within -45%~-10%. |
| Input frequency | 50Hz, frequency fluctuation range -10%~+10% |
| Input current harmonic | THDI≤4%, meeting international standard IEEE 519-2014 and national standard GB/T 14549-93 power quality standard |
| Input power factor | Up to 0.96 |
| Power output | |
| Output voltage range | 0~6KV or 0~10KV |
| Output frequency | 0-120Hz |
| System efficiency | Up to 97% |
| Output overload | Work for a long time with the load less than 105%, and inverse time protection enables within 110% ~ 160%. |
| Output current harmonic | THDI≤4%, meeting international standard IEEE 519-2014 and national standard GB/T 14549-93 power quality standard |
| Control Mode | |
| Control mode | V/F, VC control without speed sensor, VC control with speed sensor |
| Acceleration/deceleration time | 0.1-3600S |
| Frequency resolution | Digital setting 0.01Hz, analogue setting 0.1 x set maximum frequency |
| Frequency accuracy | Digital setting ±0.01% max. frequency, analogue setting ±0.2% x set max. frequency |
| Speed resolution | Digital setting 0.01Hz, analogue setting 0.1 x set maximum frequency |
| Speed accuracy | ±0.5% |
| Speed fluctuation | ±0.3% |
| Starting torque | Larger than120% |
| Excitation braking | Braking time 0-600S, starting frequency 0-50Hz, braking current 0-100% of rated current |
| DC braking | Braking time 1-600S, starting frequency 0-30Hz, braking current 0-150% of rated current |
| Automatic voltage regulation | When the input voltage varies within -10% to +10%, the output voltage can be kept constant automatically and the rated output voltage fluctuates by no more than ±3%. |
| Machine parameters | |
| Cooling method | Air cooling |
| Protection class | IP30 |
| Insulation class for phase shifting transformers | Class H (180℃) |
| Local operation mode | Touch screen |
| Auxiliary power supply | ≥20 kVA |
| Environmental adaptability | |
| Ambient operating temperature |
0~+40℃ It can start directly at -15°C, and capacity derates for use at 40°C to 55° |
| Ambient storage temperature | -40℃~+70℃ |
| Ambient transport temperature | -40℃~+70℃ |
| Relative humidity | 5%-95%RH no condensation |
| Altitude | less than 2000m |
| Installation site | Indoor |
| Contamination level | Contamination level 3 and occasional conductive contaminants are allowed |
| User interface | |
| Analogue input | 3 |
| Analogue output | 2 |
| Communication interface | 2 |
| High voltage circuit breaker control | 1 |
| Code plate interface | 1 |
| Relay type dry contact output | 6 |
| Transistorised dry contact output | 4 |
| Multi-functional terminal input | 8 |
| Power supply interface | 380V AC |
Model Specifications
| MaxWell 6kV series | ||||
|---|---|---|---|---|
| Models | Motor Power (kW) | Rated output current (A) | Weight (kg) | Dimensions (mm) |
| MaxWell-H0185-06 | 185 | 23 | 2030 | 1850*1770*2350 |
| MaxWell-H0200-06 | 200 | 25 | 2049 | |
| MaxWell-H0220-06 | 220 | 27 | 2073 | |
| MaxWell-H0250-06 | 250 | 31 | 2109 | |
| MaxWell-H0280-06 | 280 | 34 | 2145 | |
| MaxWell-H0315-06 | 315 | 38 | 2187 | |
| MaxWell-H0355-06 | 355 | 43 | 2236 | |
| MaxWell-H0400-06 | 400 | 48 | 2363 | |
| MaxWell-H0450-06 | 450 | 54 | 2385 | |
| MaxWell-H0500-06 | 500 | 60 | 2410 | |
| MaxWell-H0560-06 | 560 | 67 | 2479 | |
| MaxWell-H0630-06 | 630 | 75 | 2609 | |
| MaxWell-H0710-06 | 710 | 85 | 2664 | |
| MaxWell-H0800-06 | 800 | 94 | 2773 | |
| MaxWell-H0900-06 | 900 | 106 | 2894 | |
| MaxWell-H1000-06 | 1000 | 117 | 3060 | |
| MaxWell-H1120-06 | 1120 | 131 | 3268 | |
| MaxWell-H1250-06 | 1250 | 144 | 3502 | |
| MaxWell-H1400-06 | 1400 | 161 | 3577 | |
| MaxWell 10kV series | ||||
|---|---|---|---|---|
| Models | Motor Power (kW) | Rated output current (A) | Weight (kg) | Dimensions (mm) |
| MaxWell-H0220-10 | 220 | 17 | 2163 | 1850*1770*2350 |
| MaxWell-H0250-10 | 250 | 19 | 2202 | |
| MaxWell-H0280-10 | 280 | 21 | 2241 | |
| MaxWell-H0315-10 | 315 | 24 | 2286 | |
| MaxWell-H0355-10 | 355 | 26 | 2338 | |
| MaxWell-H0400-10 | 400 | 29 | 2475 | |
| MaxWell-H0450-10 | 450 | 33 | 2505 | |
| MaxWell-H0500-10 | 500 | 36 | 2526 | |
| MaxWell-H0560-10 | 560 | 40 | 2600 | |
| MaxWell-H0630-10 | 630 | 45 | 2740 | |
| MaxWell-H0710-10 | 710 | 51 | 2799 | |
| MaxWell-H0800-10 | 800 | 56 | 2916 | |
| MaxWell-H0900-10 | 900 | 63 | 3046 | |
| MaxWell-H1000-10 | 1000 | 70 | 3225 | |
| MaxWell-H1120-10 | 1120 | 79 | 3848 | |
| MaxWell-H1250-10 | 1250 | 87 | 4100 | 2625*1895*2470 |
| MaxWell-H1400-10 | 1400 | 97 | 4180 | |
| MaxWell-H1600-10 | 1600 | 110 | 4610 | |
| MaxWell-H1800-10 | 1800 | 124 | 4990 | |
| MaxWell-H2000-10 | 2000 | 138 | 5180 | |
| MaxWell-H2250-10 | 2250 | 154 | 5573 | |
Frequently Asked Questions
What standards do the input current harmonics of the MaxWell series meet?
The input current harmonics achieve a THDI of 4% or less, which fully meets the international standard IEEE 519-2014 and the national standard GB/T 14549-93. It operates efficiently without needing an input filter.
Does the system require external reactive power compensation equipment?
No, it does not. The combination of input transformer phase shift technology and cascade modules provides the necessary reactive power for the motor, achieving an input power factor of up to 0.96. This eliminates the need for extra reactive power compensation devices.
How does the system handle temporary grid power losses?
The inverter features a non-stop function for momentary power loss. When the grid temporarily loses power, the system keeps the motor running using stored energy. If grid power is restored before the energy storage is depleted, the system will continue regular operation smoothly.
What motor control options are available in the MaxWell series?
To adapt to various motor loads and industrial applications, the system supports multiple control modes including V/F (Variable Frequency) control, Vector Control (VC) without speed sensors, and Vector Control (VC) with speed sensors.
Is the MaxWell series suitable for harsh environmental conditions?
Yes, the system is designed for high adaptability. It features an IP30 protection class, supports startup at temperatures as low as -15℃, and can operate in temperatures up to 55℃ (with capacity derating above 40℃). Additionally, the system components have successfully passed 0.6m drop and vibration testing.