H - Electricity – 02 – P
Patent
H - Electricity
02
P
322/25
H02P 9/14 (2006.01) H02J 7/16 (2006.01) H02J 7/24 (2006.01) H02P 9/08 (2006.01)
Patent
CA 1183206
ABSTRACT OF THE DISCLOSURE A charging system for amplifying AC output voltages induced in a stator winding of an alternator by residual magnetism in the alternator rotor and energizing a field winding of the alternator at low alternator rotational speeds to self-energize the charging system by means of the residual magnetism, the charging system comprising: an alternator having a stator winding wound on a core, the alternator further having a field winding wound on a core and in operative proximity to the stator winding to provide an electromagnetic field for the stator winding; an electronic voltage regulator having at least one input terminal coupled to the stator winding of the alternator, the electronic voltage regulator comprising an operational amplifier having one of its input terminals coupled to the input terminal of the electronic voltage regulator, the operational amplifier providing an amplified output AC signal at its output terminal, a peak detector coupled to the output terminal of the operational amplifier to peak detect the magnitude of the amplified AC output signal, and a circuit coupled to the peak detector and responsive to the output of the peak detector to develop the output signal of the electronic voltage regulator, whereby the electronic voltage regulator is responsive to small AC output voltages induced into the stator winding by residual magnetism during low alternator speeds, such as during start up to develop an output signal at an output of the electronic voltage regulator of sufficient magnitude to fully excite the alternator field winding even when small AC output voltages are of lower magnitude than that required to forward a silicon semiconductor junction; and a coupler to couple the output signal of the electronic voltage regulator to the field winding of the alternator.
395607
Nordbrock Raymond E.
Sievers Kirk A.
Gowling Lafleur Henderson Llp
Motorola Inc.
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