AC Fan Motor

AC fan motor guides covering shaded-pole, PSC and three-phase induction motors, run capacitors, insulation class and replacement practice.

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By longwell / August 20, 2026 / Engineering Case Studies

Repositioning the Motor on a 230V AC Cooling Unit

We turned the AC motor on a 30mm cross flow blower to clear a tight ch...

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By longwell / August 19, 2026 / Engineering Case Studies

Factory Cooling Requirements: 10,000 m3/h 24 Inch Industrial Drum Fan

Learn the engineering behind a 24 inch industrial drum fan. See how pu...

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By longwell / August 18, 2026 / Engineering Case Studies

Harsh Climate Condenser Cooling with an 800mm AC Axial Fan

Learn how we built an 800mm AC axial fan to push 27,089 m3/h at 185 Pa...

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longwell-wi-7073135475-project
By longwell / August 13, 2026 / Engineering Case Studies

Engineering 3 Sizes of Industrial Floor Fans

We designed three new industrial floor fans. Read how we balanced size...

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AC vs EC fan variants of a cross-flow platform built for one order
By longwell / August 10, 2026 / Engineering Case Studies

We Proposed All-EC. The Customer Was Right to Refuse.

Consolidating on one motor platform would have simplified our producti...

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Axial blower stator with a copper motor winding, specified explicitly
By longwell / August 10, 2026 / Engineering Case Studies

Why the Customer Wrote “100% Pure Copper” on the Order

Nobody specifies what they trust to be there. When a procurement team ...

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Obsolete fan replacement matched to a legacy centrifuge condenser unit
By longwell / August 6, 2026 / Engineering Case Studies

The Original Maker Is Gone. The Fan Still Has to Fit.

A seven-watt fan holds a production line hostage: the old part is fadi...

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Matched 185mm axial fans in a push-pull fan configuration
By longwell / August 4, 2026 / Engineering Case Studies

One Fan Pushes, the Other Pulls

The customer ordered the same fan twice — once sucking, once blowing. ...

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Two 250mm centrifugal fans built for different fan static pressure duties
By longwell / August 3, 2026 / Engineering Case Studies

750 Pascals and 220 Pascals Are Different Fans

Same diameter, same voltage, same enclosure. The two fans share everyt...

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Heat exchanger axial fans built as a pilot production run of fifty
By longwell / July 31, 2026 / Engineering Case Studies

Fifty Units First: What a Pilot Batch Is Actually For

The drawings were approved and the samples passed. The customer still ...

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