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OpenSourceEBike / Bafang_M500_M600

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Stator and Rotor weight and details #32

Open PrivatePuffin opened 3 years ago

PrivatePuffin commented 3 years ago

A slight update: I figured out how Bafang complied to the EU nominal power regulations. The m500 DOES have a different stator (and also maybe rotor).

However, i got no specifics, can anyone comment with the weight of their stator and/or rotor?

PrivatePuffin commented 3 years ago

@Tomblarom @CiDi-IT and @casainho ?

casainho commented 3 years ago

Nice to know. I am more interested on the M800. I am still waiting for availability for me being able to buy repair parts at a fair price and not such high prices as currently. Also Bafang motors are very expensive.

CiDi-IT commented 3 years ago

This was already known. Look at the dimensions and weight of the two motors: Weight: M600 3.7kg / M500 3.3kg Stator Height: M600 72.4mm / M500 63.4

PrivatePuffin commented 3 years ago

@CiDi-IT I don't see those stator sizes in that drawing tbh?

That being said: What was not known, is if that was in fact the part that caused the nominal rating. I've since then got confirmation that indeed the motor unit is thermal limited using stator (and possibly rotor) sizing.

This is super important, because it means it's safe to use different controllers and controller firmwares without requiring formal EU recertification.

M800

@casainho Why not the m510? Slightly more power and at least guaranteed to be the same mounting as the m500?

Still, that leaves:

  1. Stator Weight
  2. Stator Specifications
  3. Rotor Weight
  4. Rotor Specifications
  5. Rotor Axle specifications
CiDi-IT commented 3 years ago

@CiDi-IT Non vedo quelle dimensioni dello statore in quel disegno tbh?

Detto questo: ciò che non si sapeva, è se quella fosse effettivamente la parte che ha causato il rating nominale. Da allora ho avuto conferma che effettivamente l'unità motore è limitata termicamente utilizzando il dimensionamento dello statore (e possibilmente del rotore).

Questo è molto importante, perché significa che è sicuro utilizzare controller e firmware di controller diversi senza richiedere una ricertificazione UE formale.

M800

@casainho Perché non l'm510? Leggermente più potente e almeno garantito per essere lo stesso montaggio dell'm500?

Tuttavia, ciò lascia:

  1. Peso dello statore
  2. Specifiche dello statore
  3. Peso del rotore
  4. Specifiche del rotore
  5. Specifiche dell'asse del rotore

Here you can see it M500_M600-Dimensions

PrivatePuffin commented 3 years ago

Wow I totally looked over that detail, thanks @CiDi-IT

Thats also good news for law enforcement btw: If it has the m500 case, it cannot reasonably fit the larger stator.