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FREQUENCY CONVERTER SD4S

The product version SD4S - S for Stand-alone - is the first device of the new product series SD4x. The SD4S devices are designed for stationary use in control cabinets of machine tools, turbo compressors and turbo blowers.

FUNCTION • ADVANTAGE • BENEFIT

PWM FREQUENCIES UP TO 32 kHz

  • Function:  The SD4S provides PWM frequencies up to 32 kHz and commutation frequencies up to 64 kHz.
     
  • Advantage:  Higher rotating field frequencies up to 6,000 Hz and lower harmonic frequency components.
     
  • Benefit:  Realization of higher pole motor designs and lower motor losses.

MOTOR ANALYZER

  • Function:  Simulation of the operating points and FFT analysis with THDi and THDu calculation.
     
  • Advantage:  Analysis of system performance already at the start of development.
     
  • Benefit:  Reduction of development time, costs and risk as well as optimization of the overall system.

GALVANICALLY ISOLATED THERMAL CONTACT INPUT

  • Function:  The input for the thermal contact is galvanically isolated from the logic and main voltage.
     
  • Advantage:  Safe operation even in case of an insulation problem of the thermal contact in the motor.
     
  • Benefit:  Protection of the inverter in the event of a fault and higher system availability.

BETTER PERFORMANCE AND NEW CONTROL FUNCTIONS

The first available unit type is designed for small high-speed spindles or motors in the power range from a few hundred watts to 1 kW. Application areas are e.g. dental milling machines or machines for super finishing as those required in watchmaking. Since small spindles do not come with a sufficient insulation resistance in the motors, SD4S now features a galvanic isolation of the thermal contact.

An absolute novelty is the design width of 40 mm only. Particularly in applications with many axes and a low performance, the demand for highly compact drive systems is great. Thus, the construction volume has been further reduced. The parameterization is realized via a default Ethernet interface that replaces the USB interface, which in industrial environments is prone to failure.

Moreover, SD4S comes with programmable digital measuring system interfaces such as Biss-C, EnDat2.2 and TTL. Via a Webserver, technicians can display device information without the need of additional parameterization software. Thanks to the real-time clock, a time synchronization of an incident is possible: Users can figure out whether a failure has been caused for example by a thunderstorm.

The optimized performance, higher speeds as well as the lower motor heating without sine-wave filter are substantial advantages of SD4S.

SD4S - ALWAYS THE PERFECT DRIVE FUNCTION FOR YOUR APPLICATION

 

PSM: (Permanently excited synchronous motor), IPM (Interior Synchronous Permanent Magnet Motor), ASYN: (Asynchronous motor) SVC: (Sensorless vector control), Servo: (Servo mode with encoder feedback), V/f-PWM: (Sensorless V/f characteristic control based on pulse width modulation), HS-Block: (Block control with Hall elements)

TECHNICAL DETAILS

THE INTERFACES OF FREQUENCY CONVERTER SD4S

  1. Supply voltage / external ballast resistor
  2. 24 VDC logic power supply
  3. Safety integrated „STO“:  Restart lock to meet category 4/PL e according to EN ISO 13849 1:2015 and EN 61508:2010 SIL3
  4. RS232/485, CAN interface
  5. Ethernet 100 MBit, parameterization, diagnosis and operation
  6. Digital inputs and outputs
  7. Digital motor encoder interface (BiSS C, EnDat 2.2, TTL)
  8. Optional: EtherCAT, Profinet, Powerlink
  9. Galvanically isolated thermal contact
  10. Motor connection
  11. Analog motor encoder interface (Resolver, SinCos 1 Vss)

DRIVE FUNCTIONS AND SAFETY FUNCTIONS

SVC
V/f PWM
HS-Block
Servo
LI
STO

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