Operation and Maintenance Manual, TECS 18.

Abstract

The Welco Industries Total Environmental Control system (TECS 18) operates from multiple frequency power sources to provide solid-state proportional temperature control of both air conditioning and heating. Three independently controlled pulse-width modulated variable frequency inverters provide variable speed control of a compressor, condenser fan and evaporator fan motors. Zero-crossing heat controls provide 5.6Kw proportional heat and 3.8 Kw ON-OFF heat in the two HEAT modes. The electronic controls are located within the four basic modules. The Evaporator Drawer contains the system control logic in addition to the inverter drive circuitry for the evaporator fan. The Power Deck contains the main system power supplies and the Comp/Cond Drawer contains the inverter drive circuitry for both the compressor motor and the condenser fan.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1978
Accession Number
ADA087300

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Compressors
  • Control Knobs
  • Control Panels
  • Control Systems
  • Detectors
  • Electronics
  • Frequency
  • Frequency Converters
  • High Voltage
  • Inverters
  • Junction Boxes
  • Power Converters
  • Power Electronics
  • Power Supplies
  • Silicon Controlled Rectifiers
  • Sine Waves
  • Waveforms

Fields of Study

  • Engineering

Readers

  • Electrical Engineering

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems