These currents are furnished by an alternator which transmits sine currents over the line and operates a motor at the distant end of the line, both machines running in synchronism.
In creating powerful electric waves for communication over long distances it is necessary to employ an alternating current transformer (see Transformers) supplied with alternating currents from a low frequency alternator D driven by an engine to charge the condenser (fig.
The impedance of the primary or alternator circuit is so adjusted that when both the chokers are in circuit the current flowing is not sufficient to charge the condensers; but when one choker is short-circuited the impedance is reduced so that the condenser is charged, but the alternating arc is not formed.
Up to that time an induction coil known as a ro-inch coil had sufficed for spark production, but it was evident that much more power would be required to send electric waves across the Atlantic. Transformers were therefore employed taking alternating electric current from an alternator driven by an oil or steam engine, and these high tension transformers were used to charge condensers and set up powerful oscillations in a multiple antenna.
Employed for the production of the continuous trains of waves a high frequency alternator of his own invention (see The Electrician, 1907, 5 8, pp. 6 75, 701).
In the point-by-point method the shaft of an alternator, or an alternating current motor driven in step with it, is furnished with an insulating disk having a metallic slip inserted in its edge.
This contact may be made to close the circuit of a suitable voltmeter, or to charge a condenser in connexion with it, and the reading of the voltmeter will therefore not be the average or effective voltage of the alternator, but the instantaneous value of the electromotive force corresponding to that instant during the phase, determined by the position of the rotating contact slip with reference to the poles of the alternator.
In another form devised by Callendar," a revolving contact disk is placed on the shaft of an alternator, or of a synchronous motor driven by the alternating current under test.
In this case the large vibrating mirror must be oscillated by a current from an alternator, on the shaft of which is a disk of nonconducting material with brass slips let into it and so arranged with contact brushes that in each period of the alternator a contact is made, charging say a condenser and discharging it through the oscillograph.
An engine driven 85 amp alternator ensures that the batteries are always well charged up.
Engine All the boats come with a 4 cylinder Isuzu 55 engine with PRM hydraulic gearbox and twin alternators.
Environmentally compatible The repair of used alternators and starters.
High performance alternator charging system with electronic voltage control.
In 1991, we began producing alternators at our Cardiff plant in South Wales.
Retest with multi meter Meter reads 15- 20 volts alternator is charging too much, regulator is not working properly & needs replacement.
Standard V shape pulley with boss to fit alternator or Dynalite.
Take the car to your mechanic to have the alternator checked for proper operation.
The engine alternator is 50 amps and we have an Ampair 100 wind generator with optional water turbine.
The lightweight alternator supplying the power required by the motorcycle has an output of 720W at 60 amps.
The smaller gensets use a simple shaft mounted fan to keep the windings cool, much like a car alternator does.
To improve charging system performance under these conditions, a new, higher output alternator is now available.
Why did they need an up-rated alternator, I asked?
Alternator belt is properly adjusted to ensure the batteries get well charged.
Alternator controller for front bow thruster battery can also be seen.
Alternator conversion has sadly not progressed yet.
Alternator driven by the engine.
Alternator pulley seizing on vehicles in the UK.
Alternator rotor in the coils to generate AC ( then converted to DC for the car systems ).
Alternator warning lights would be replaced by a single " general car default " warning light.