Product Description
BMW S1000RR/M1000RR/K67 2020 Onwards Race Generator
This is the complete race generator kit including the lightweight flywheel, stator, mounting plate, cup, fasteners, connectors and specific regulator / rectifier. With all the parts mounted in a new genuine casing.
Significantly lighter than standard, offering higher output than 'race kit' versions, providing increased throttle response, less gyroscopic forces and more bhp everywhere. It is designed to fit high performance injection engines, and as a replacement for standard alternator systems.
A three-phase, nine-pole, six-magnet design with a double lap-wound stator and permanent magnet rotor was selected. Operating generator speed range of 4,000 to 17,000 rpm.
Typical gains on a standard bike are around 5-6bhp.
More info' here:
Rotor Design. We used a high-coercivity magnet with an intrinsic coercivity of at least 1.1 Ma/m at 160ºC, to minimize temperature increases and resultant eddy current losses, six magnets were used in the rotor’s interior configuration.
Rotor diameter was reduced further to 45mm, by employing the rotor’s shaft as part of the rotor flux circuits. A high tensile steel band encloses the rotor, preventing magnet burst at the centrifugal forces produced at the rotor’s 18,000 rpm redline. The rotor’s tapered mounting assists heat conduction and close tolerances help with utilising flux conduction from the shaft hence reducing losses.
The final generator design (although being continuously improved) is cooled by engine oil, with stator cooling passages around the circumference of the hard anodised cup. The windings and core worked out at 80mm in diameter, and the rotor 19mm long, significantly exceeding our initial design.
Please note BDK race generator kits are for racing purposes only and not designed for high draw systems with lights etc. (road machines). The kits are designed with performance riding in mind and will not charge below approx. 4500RPM, this is the trade-off you get for more power elsewhere.
