Abstract
A practical method for operating an inverter-fed induction motor
drive at the point of maximum efficiency while maintaining any particular
torque-speed load point is presented. The design and operation of
an economical, microprocessor-based adaptive controller used to modify
a commercially available six-step inverter for minimum loss operation
of an induction motor are described. Experimental results are presented
in graphical form, giving comparison of overall drive system efficiencies
between loss minimization control and constant volts/hertz control
operation for a standard-efficiency induction motor with a 10 hp
rating. The greatest potential for energy savings is found to exist
for the case of loads with nonlinear torque-speed characteristics,
such as a fan or pump load
- adaptive
- applications,
- characteristics,
- computerised
- computing10
- constant
- control,
- controller,
- drive,
- drives,
- efficiency,
- electric
- energy
- engineering
- hp,
- induction
- inverters,
- load
- loss
- losses,
- machine
- maximum
- microcomputer
- microprocessor-based
- minimization
- motor
- motors,
- nonlinear
- point
- power
- saving,
- torque-speed
- volts/hertz
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