Stator Tester (surge / hipot)

Selection criteria

Surge voltage, waveform-comparison algorithm, test cycle time.

Supply chain

Shenzhen has several makers of stator and armature testers (impulse, hipot, resistance, rotation direction) that grew up serving the Pearl River Delta appliance-motor industry. Check the waveform-comparison algorithm and how easily limits are set from a golden sample.

Buyer FAQ

What does a stator tester check?

Typically winding resistance and balance, insulation resistance, hipot (winding to core), surge / impulse (turn-to-turn insulation), inductance and winding direction, all in one connection and a few seconds per stator.

Why is the surge test so important?

A turn-to-turn short barely changes resistance and passes hipot, but it will burn out in service. The surge test applies a fast high-voltage pulse and compares the ringing waveform with a known-good stator, catching weak or shorted turns.

How do I set the surge limits?

Learn the waveform from several good stators, then set area-difference and error-area limits (often a few percent). Validate by testing stators with deliberately damaged turns, and re-learn after any change in wire or winding.

Where it is used