LabInverter

ENASYS - LabInverter

Purpose of use / Applications

The ENASYS LabInverter is an IGBT based three-phase PWM Voltage Source Inverter for induction machines. Design and function of the inverter are based on five years experience of teaching the course: „Microprocessor control of a PWM Voltage Source Inverter“ at Berlin University of Technology. The inverter was developed to teach and excercise practical aspects of power electronics and drives. It consists of a DC-Supply (or rectifier), DC-link, inverter, chopper, measurement interface and control unit. The control unit uses two XE167 Infineon microcontrolers, which belong to the latest generation of microcontrollers for automotive and industrial applications. Extended safety features and low operating voltages (VDC-link≤42V) are the reason therefore, that the inverter is optimally suited for classroom environments.

Features

  • Three-phase IGBT IPM 1200 V, 100 A
  • 42 V to 700 V DC
  • 3000 µF DC-link
  • Potential-free measurement of current and voltage
  • Signal processing for oscilloscope
  • Dual controller control unit
  • OCDS Debugging interface
  • PC control via USB
ENASYS - LabInverter

Block diagram

ENASYS - LabInverter - Block diagram

Educational content

  • Programming of microcontrollers for industrial/traction applications
  • Fundamentals of embedded systems programming
  • Latest XC2200/XE167 real time signal controller technology
    for industrial, traction and automotive applications
  • Components, function and realization of main power part components
    (e.g. IGBTs, gate units, dc voltage link, induction machine)
  • Components, function and realization of advanced control platforms
    e.g. current sensors, voltage sensors, measurement interfaces,
    auxiliary power supplies, etc. )
  • Implementation of protection schemes
  • Speed/position measurement using quadrature encoders
  • Implementation and test of
    • different PWM schemes (e.g. sine-triangle; space vector)
    • full bridge modulation schemes (e.g. unipolar, bipolar, phase shifted)
    • control schemes (e.g. V-f control, Vector control, DTC, Sliding Mode Control, etc.)
    • drive operating modes (e.g. acceleration, steady state operation, braking, operation at zero speed, etc.)
Components Specifications
Control Unit Two Infineon XC2200/XE167 Controllers [66MHz] ~ Fast 16 MBit SRAM [Acess time 10 ns] ~ Incremental encoder interface ~ USB and RS 232 Interface ~ OCDS Debugging Interface ~ Analogue overload protection ~ Interface for Extensions (I2C, SPI, LVDS, analogue) ~ 24 V Single Supply ~ LCD-Display ~ Pre-installed example programm with Sinus-Triangle-Comparison, start up, speed measurement, temperature regulation, measurement value recording, USB-Communication, etc.
IGBT Inverter Input voltage 42 V DC to 700 V DC ~ 1200 V, 100 A IGBT 3-Phase-2-Level voltage source inverter (VSI) ~ DC-link 3000 µF / 700 V ~ Fast IGBT-Gate-Unit (td <200 ns) with overcurrent, overvoltage and overtemperature protection ~ Protection against damages through wrong programming (e.g. bridge short circuit) ~ Failure response ~ 24 V Single Supply ~ integrated Chopper with adjustable hysteresis control ~ Temperature regulated air cooling
Options LabMaster for PC: graphic user interface ~ Scope-likely visualisation of measurement values and control parameters e.g. current, voltage, integral-ratio, etc.) ~ Set of analogue and digital desired value ands control parameters (e.g. frequency , power, ON/OFF, ramp steepness etc.); Example programmes: e.g. space-vector-modulation, U-f-cotrol, etc.; NI LabView: Interface VIs for the control of the LabInverter; 400 V Option: allows IGBT-Inverter to operate at the 3-phase 400 V mains ~ diode-inverter ~ pre-load circuit ~ main switch; Measurement interface: potential-free measurement of voltage and current ~ Signal processing and filtering ~ Output of phase current and phase voltages via BNC bush for oscilloscopes; 42 V AC motor: particulary for 42 V intermediate circuite voltage ~ 370 W nominal power; 42 V / 470 W Netzteil: switching power supply for 42 V intermediate circuite voltage

*optional See datasheet