E 2.5.3.3 Napędy z edukacyjnym przetwornikiem częstotliwości

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Opis

The power electronics part of this lab practical uses training panels. The electrical machine employed is an industrial machine on a base, whereby the characteristics of the machine can be determined using the Machine test system 0.3. Power is supplied to the machine under test via an educationally designed frequency converter, which obtains its power from the normal mains (mains voltage, 230 V).

Objectives

  • Protective measures and electrical safety
  • Set-up of power generating systems according to circuit diagrams
  • Putting electrical drives into operation
  • Recording of load characteristics with various operating parameters
  • Achieving skills in measuring electrical machines
  • Automatic speed control for an asynchronous (induction) machine

Power electronics has developed from the technology of static converters to become one of the most important and all-encompassing areas of electrical engineering. The job of power electronics is to switch, control and convert electrical energy using power semiconductors with the best possible efficiency. One key application is drive technology. With the help of modern power electronics, it is possible to construct variable speed drives in DC and three-phase circuits for 4-quadrant operation. In this equipment set, a universal converter is used for open- and closed-loop control of speed for a squirrel cage motor.

Students work in the power engineering lab with mains voltage. Experiments procedures are contained in a printed manual.

The experiments are designed for intermediate and advanced levels.

Topics

  • Rotating field and space vectors
  • Modulation types: square, trapezoidal, sinusoidal, pulse width modulation (PWM)
  • Voltage vector control VVC
  • Magnetisation with a linear V/f characteristic
  • Boosting of magnetisation by means of the start voltage
  • Optimisation of load characteristics by means of IxR compensation
  • Slip compensation
  • Operation of the motor in a star configuration
  • Computer-assisted measurement and evaluation using CBM 10 software
  • Recording a load characteristic
  • Comparison of multiple load characteristics
  • Brake choppers
  • Variable-speed drives

Similar to illustration

Components of equipment sets

735 297   Universal converter 3 x 230 V 1
735 296 Converter input/output 1
731 09   * Tacho generator 0.3 1
732 104   Squirrel cage motor 230/400/0.3 1
734 02   * Reference variable generator 1
734 19   * Gain and offset adjust 1
734 064N   * PID digital controller Net 1
725 007 * Software: Leylab.control Lite 1
The PID digital controller Net (734 064N) can be incorporated into a network. The basic software LEYLAB.control Lite or the full version LEYLAB.control 725006 is needed to operate the equipment. An optional non-networkable version is also available:
734 064   * PID digital controller 1
735 291   Control unit PWM 1
501 02   BNC cable, 1 m 2
531 282   Multimeter Metrahit Pro 1
575 231   Probe 100 MHz, 1:1 / 10:1 2
575 230   Digital storage oscilloscope 722 1
735 261   Isolation amplifier, four channel 1
731 989USB   Machine test system 0.3 1
728 421   CBM10 MOMO/FCCP 1
524 004   Adapter, USB port/serial port 1
729 769   RS-232 cable, 9-pole 1
726 09   Panel frame T130, two-level 1
726 86   DC-Power Supply ± 15 V/3 A 1
726 71 Single-phase supply unit 1
731 06   Coupling 0.3 1
731 07   Shaft end guard 0.3 1
731 081   Coupling guard 0.3 transparent 1
500 59   Safety bridging plugs, black, set of 10 1
500 851   Safety connecting leads, 32 A, set of 32 1
500 852   Safety connecting leads, 32 A, yellow/green, set of 10 1
565 441   LIT: Power Electronics and Drive Technology, T 12.4.4 (in German) 1
565 442   * LIT: Power Electronics and Drive Technology, T 12.4.4 (In English) 1
additionally required: PC with Windows XP/Vista/7/8

Articles marked with * are not essential, we do however recommend them to carry out the experiment.

 

Marka

Leybold

Firma produkuje zestawy edukacyjne do kształcenia akademickiego oraz szkolenia zawodowego z zakresu fizyki, chemii, biologii oraz elektroniki, elektrotechniki, automatyki, telekomunikacji, maszyn elektrycznych, odnawialnych źródeł energii i fotoniki, jest częścią grupy LD Didactic.

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