PowerSpout
TRG installation 2018
Last revised July 2018
© 2018 EcoInnovation Ltd (NZ)
Page 25
Magnetic field strength can be adjusted using packing washers (See section 2.3.4 or 2.3.5)
to reduce the open circuit voltage if necessary to prevent damage to connected equipment.
These washers are also used to optimise the operating rpm in the case of direct battery-
charging systems TRG28 and 56.
The rotor is chosen to match the stator's pole pattern, and also the desired power output.
Turbines with the HP option have a more expensive rotor than standard turbines.
The extractor knob
The extractor knob is a separate part that must be popped into the
hole in the magnetic rotor (by pressing hard) prior to assembly. Its
function is to make it easy to slide the rotor on and off the shaft
despite the strong magnetic forces that pull it toward the stator.
Check for and remove any particles or debris adhering to the magnets
before assembly. The rotor can now be fitted.
Fitting the rotor (always with extractor knob fitted)
Grease the mating splines. Place the rotor on the "dry end" of the shaft over the stator. Take
care, as it will be pulled on forcefully. Rotate it gently (whilst holding the runner below at the
wet end) until the spline engages and it locks on.
Rotate the knob clockwise to install the rotor. Keep going until it stops. Finger tight is fine.
To remove the rotor simply reverse this process, turning the knob to the left, or (instead) hold
the knob tight and spin the rotor to the right to pull it free of the stator.
Spin the assembled magnet rotor to check that it moves freely. It is normal for it to make a
soft whine and slow down in a couple of seconds to a halt.
Rotor types
We use two types of stators in PowerSpout turbines (42 pole and 36 pole).
We use two types of rotor for each stator type.
Type 2 and 2+ are compatible with 42 pole stators.
Types 3 and 4 are compatible with 36 pole stators.
Stator type
Rotor type for 0.75W/rpm
Rotor type for 1.0W/rpm (HP)
42 fingers on stator
Type 2 (default)
Type 2+
36 fingers on stator
Type 3
Type 4 (default)
For more information about Smart Drive stators and rotors see the
SD applications manual
