HiddenPower Electric conversion kit for Brompton bicycles

Two kits were boughtfor our brompton bicycles. Already on the second engine i ran into trouble and had to contact the dealer at

hjyim@hiddenpower.eu

They could inform that from my discription there semed to be afaulty controller as well, so they offered to supply two new sets for me, and shipping the first ones back

I have found little stuff online about the HiddenPower engine for the European Standard:
EN 15194.
Link discussing the European standard vs other

The Conversion kit comes with a PAS contoller, pedelec. The set will originally be connected correct, but it may be switched to throttle control in the throttle itself:
Connection chart for HiddenPower throttle

The engine itself is compact, simple and practically without maintenance components. There are bearings in the roller and there are a transmission belt in the unit. Because of a faulty assembled engine I got the chance to look inside it.

There is a magnetic kernel inside an electric coil. The magnetic kernel is the moving part in the engine. It is supported by a ring, semingly made of brass. The transmissionbelt is hidden inside the black transmissionarm, not visible in the pix supplied. I bought two exemplaries and one of them was possible to pull appart like shown. On contact with hjyim@hiddenpower.eu I was offered a new engine instad of trying to glue it together.

The Engine hub, even now when it is loose is held together by strong magnetic power. The black unit on the picture is what actually is the engine. The rest is just a decoration cover and a tension ring to keep the unit in contact with the wheel. A lid covers the electric chords from the engine and secure it from sliding sideways.

The fastening brackets is what makes it adaptable to almost any bicycle. It will differ according to model and brand.

The controller chords and the engine chords are unmarked, but the logic seems to be to connect the two middle chords and try to find the correct direction of rotation by changing between the other two chords.