Is there a voltage regulator for BMW are airhead?
Power Rating: 14.3 Volts; can be adjusted to higher voltage, simply turn the small screw on the regulator in a clockwise direction to obtain HIGHER voltage, to decrease, turn counter-clockwise. Can also be adjusted lower but should not go below 13.7 Volts as this may not be sufficient to overcome the internal resistance of the battery.
How does a battery regulator work on a motorcycle?
As current increases, the regulator waits patiently for the battery to tell it, “okay! enough is enough!”. Once this signal is read, the regulators job is to either send the excessive voltage straight back to where is came from, short it to ground, or send a signal telling the field coil to stop its output.
How does the regulator work in an alternator?
• The regulator is the brain of the charging system. • It monitors both battery and stator voltages and depending on the measured voltages, the regulator will adjust the amount of rotor field current to control alternator output. • Regulators can be mounted both internal or external. Current technology uses an internal regulator.
When did BMW change from mechanical to electronic ignition?
The first part of this article covers the basics for this 12 volt mechanical VR unit, as used on BMW Airhead motorcycles before BMW changed to electronic ignition in 1981, after which the VR’s were electronic, and are covered by other articles by me in this website. This article applies onlyto the mechanicalvoltage regulators.
Where is the regulator located on a motorcycle?
The regulator is usually located under the vehicle chassis at the front of the engine, and another function is to convert AC voltage (alternating current) to DC (direct current). If this function is not fulfilled, faults may occur in the regulator itself or in the other related components.
Is the alternator on BMW R90S the same as BMW authorities?
The Authorities model has the same 238 watt rating as the R90S; but, is designed to produce usable output at a slightly lower rpm than all the others, except the very last Airheads. Almost all alternator parts are physicallyinterchangeable (the 105/107 mm stators being the exception).
What happens when the regulator of a motorcycle fails?
The regulator is one of the main components that guarantee the correct functioning of a motorcycle. When this component fails, multiple situations can occur where the vehicle may stop working properly and other engine components may be affected.
How many phase stators are in a BMW airhead alternator?
Three phase stator windings (most any alternator, generally) are actually three separate windings, so there are six wires. These can be connected in a delta format, or a Y (wye) format. Only in the Y (wye) format can a center-tap be available; which offers additional output, so all the Airhead Bosch stators are so connected.