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The Combined Inverter/Motor: Its Time Has Come, Says Aeg

01 April 2004





The first fully integrated inverter/motor combinations began to emerge
around five or six years ago, but in AEG Lafert's view, the market is
only now prepared to embrace the technology. A recent OEM enquiry to the
company could achieve sales volumes of 800 units per year for this single
order if it is successfully concluded, and AEG predicts the total market
for combined motor/inverters could reach as much as 50,000 units per year
within the next three years.

In response to this perceived market upturn, AEG Lafert has launched its
Concert-Drive combined motor/inverter package, which presently covers the
power range 0.75-2.2kW (single-phase). Unlike many competing products,
however, this is not a product you choose from a catalogue or pick from a
distributor's shelf. Every Concert-Drive is a bespoke drive/motor product
that provides only the functionality required by the customer, and
nothing more. AEG believes the approach cuts costs for the OEM and
narrows the gap on price between the alternative separate drive and motor
arrangement.

The drive side is supplied by Danfoss, a company that pioneered the
combined inverter/motor concept. The motor is, of course, an AEG product
and interestingly it is a high efficiency permanent magnet rotor design
that is appreciably smaller than an equivalent ac induction motor.
Indeed, the 2.2kW unit is contained within an IEC 80 frame size. Other
features include a multi-voltage input capability (100-240V), IP55
protection and motor speeds of up to 12,000rpm.

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