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MaxWell Medium-voltage Variable Frequency Drive, 3.3~10kV

MaxWell Medium-voltage Variable Frequency Drive, 3.3~10kV

XICHI’s MAXWELL H series Variable Frequency Drives are versatile devices used to optimize motor performance, enhance energy efficiency, and provide fine-tuned control in a wide range of applications.


Input voltage ranges: 3.3kV ~ 11kV

Power range: 185kW ~ 10000kW.


Applied for a wide range of industrial applications:

For general loads, such as pumps, fans, compressors, conveyor belts;

For special loads, such as compactors, crushers, extruders, mixers, mills, kilns, etc.

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    product details
    Features
    Basic Parameters

    Model Specifications

    • Features

    • 1. Input current harmonics
      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.

      2. Input power factor
      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.

      3. Output voltage waveform
      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.

      4. Overall efficiency
      Efficiency up to 97%, better electromagnetic design for phase shifting transformers to reduce losses, and IGBT uses international first-tier brand.

      5. Grid adaptability
      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.

      6. Lightning protection
      The mains input, output, control power input and communication signals are protected against lightning.

      7. Modular design
      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.

      8. All-in-one design
      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.

      9. Low voltage soft-start function
      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.

      10. Control power
      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.

      11. Multiple motor control options
      Depending on the motor applications, VF control, vector control and direct torque control (DTC) are available to suit various motor loads.

      12. Fault protection
      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.

      13. Rich user interfaces
      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.

      14. Power module design
      Independent duct design, adaptable to various industrial applications. Interference-free fibre optic control signals. Module control adopts DSP digital control.

      15. Master control system
      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.

      16. Interference-free switching technology
      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.

      17. Easy maintenance
      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.

      18. Highly adaptable to the environment
      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

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