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Frequency Converter SD2M Turbo

Standard converters in the higher power classes typically use the well-known technology of two-level pulse width modulation (PWM) with max. 8 kHz switching frequency. In most high-speed applications, this requires additional components such as LC filters or chokes to minimize the additional losses in the engine.

Highlights

  • Three-Level Technology

    Function:
    The output stages of SD2M Turbo are based on a three-level technology and provide rotating field frequencies up to 2,000 Hz with switching frequencies of 16 kHz.

    Advantage:
    Reduced motor losses combined with minimum efforts for motor filters and motor chokes as well as low interfering radiation and insulation stress.

    Benefit:
    Low system costs over the whole product life cycle.

  • Efficiency

    Function:
    The devices reach efficiencies of up to 98 %.

    Advantage:
    The high efficiency of the devices ensures optimal system efficiencies and reduces cooling requirements.

    Benefit:
    Maximum system output and lower environmental footprint due to lower energy consumption.

  • DC Supply

    Function:
    Active emergency braking and maintenance of voltage supply in case of power supply failure.

    Advantage:
    No separate voltage supply for the magnetic bearings needed.

    Benefit:
    Protection of the magnetic bearings in case of power failure as well as cost savings.

Technology/
System-Property
SD2M
Three-level PWM
Standard converter
Two-level PWM with motor choke
Standard converter
Two-level PWM with LC filter
Low weight X X
Small installation space X X
No risk of resonance effects X
Total costs X X

 

Motor Currents by Comparison

Good to Know

  • Currently available power classes from 100 to 500 kVA, with up to 800 Arms rated current
  • Liquid cooling as standard (water-based), air cooling on request
  • NRTL/CSA certified.
  • Reducing the switching PWM amplitude by 50 % leads to very low insulation stress of the motor - even when using long motor cables  (see diagram below)
  • Optional DC voltage supply for active magnetic bearings via internally fused terminals (intermediate DC circuit)
  • Designed for 100 % load 24/7
  • All power components are designed for 10 years continuous operation at nominal load
  • Designed for worldwide 3-phase supply networks - also IT grids without grounding
  • Efficient software drivemaster2 for parameterization and diagnosis
  • Customized solutions can be realized
  • 3C3 protective coating of the PCBs for operational reliability in aggressive environments

The Interfaces of Frequency Converter SD2M for Turbo Applications

  1. USB connection, parameterization, diagnosis and operation
  2. RS232 / RS485 / CAN interface / Modbus
  3. 2 analog reference value interfaces: +/-10 V,  2 analog outputs: 0 to 10 V
  4. Universal Motor Encoder Interface: Hall sensor, linear Hall sensor, magnetoresistive sensor, NAMUR sensor (pulse generator), Sin/Cos encoder
  5. 9 digital inputs and 5 digital outputs
  6. Liquid cooling
  7. Safety integrated "STO": Restart lock to meet category 4/PL e according to EN ISO 13849-1:2015 and EN 61508:2010 SIL3
  8. Motor connection
  9. 2 TTL encoder inputs and outputs
  10. Power supply

Drive Functions and Safety Functions

SVC
V/f PWM
Servo
LI
STO

Software for Initial Operation and Parameterization: drivemaster2

Parameterization

  • Tree-type structure
  • Block diagrams
  • Graphics
  • Interactive help messages
  • Comments
  • „Parameter-Wizard“

Operation

  • Without higher-ranking control
  • Visualized reference and actual values
  • Error and status messages

Diagnosis

  • 4-channel oscilloscope
  • Zoom functions
  • Trigger functions
  • Long-term recording function
  • Measurements can be saved
  • Diagnosis of the inputs and outputs
  • Bus monitor

Technical Specifications SD2M Turbo
with 3-phase AC Mains Voltage without Break Chopper

Device type Rated power1 Rated current Max. output voltage1 HxWxD (mm) Weight Cooling
Compact devices - 3 x 200...480 VAC mains voltage
0369171AF0200 100 kVA 165 Arms 3 x 410 VAC 685 x 388 x 188 30 kg Water 2) 4)
0369173AF0200 150 kVA 255 Arms 3 x 410 VAC 771 x 439 x 207 43 kg Water 2) 4)
0369173BF0200 190 kVA 310 Arms 3 x 410 VAC 771 x 439 x 207 43 kg Water 2) 4)
0369175AF0100 300 kVA 480 Arms 3 x 410 VAC 1317 x 326 x 498 94 kg Water 2) 3)
0369175BF0100 396 kVA 630 Arms 3 x 410 VAC 1296 x 424 x 359 94 kg Water 2) 3)
0369276BF0200 500 kVA 800 Arms 3 x 410 VAC 1478 x 353 x 596 136 kg Water 2) 3)


1) Rated power and max. output voltage for mains voltage/supply voltage (in italic)
2) Aluminum cooling pipes
3) Copper cooling pipes
4) Air-cooled versions and versions with other cooling pipe materials on request

Applications

  • In the field of turbomachines, the system's efficiency can be continuously improved by increasing the system speed or omitting the gear. 

     

  • Due to their design, a large number of technologies in the field of waste energy usage or mechanical energy storage require high-speed motors and generators

     

  • Rotary atomization processes, e.g. applied for the production of milk powder or flue gas treatment, require high circumferential speeds. Therefore, it is necessary to use matching high-speed motors instead of low-speed standard motors.

     

  • Refrigeration units with turbo or centrifugal compressors with higher power ranges operate with high speeds. Frequency converters by SIEB & MEYER easily provide the required speeds and their control method ensures an exceptionally low rotor heating.

     

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