Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied
Patent
1989-01-25
1991-05-07
Hickey, R. J.
Electricity: single generator systems
Automatic control of generator or driving means
Voltage of generator or circuit supplied
322 25, 322 73, H02J 714, H02P 930
Patent
active
050139967
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on a voltage regulator of the generic type of the main claim. From DE-PS 27 38 897, a voltage regulator for a generator is known, having a differential amplifier for comparing the generator voltage with a reference voltage and a subsequent series circuit consisting of at least the elements of smoothing capacitor, threshold stage, controllable semiconductor switch and generator exciter winding.
It has been found that the statics of the two-position controller according to the specified prior art, which operates purely proportionally, become more and more unsatisfactory as the rated current of the generators increases, especially since the system must be forced to operate at a higher frequency than its natural frequency in order to prevent the so-called lamp flickering.
It is therefore the object of the invention to create a voltage regulator which operates satisfactorily in all operating ranges and for almost any rated current and, in addition, can also be easily integrated with a view to large-scale production.
ADVANTAGES OF THE INVENTION
The voltage regulator according to the invention is found to be optimum with respect to its regulating characteristic even at high rated currents.
Other advantages of the invention are obtained from the description following of an illustrative embodiment in conjunction with the subclaims.
DRAWING
FIG. 1 shows a rough block diagram of an illustrative embodiment of the voltage regulator according to the invention,
FIG. 2 shows an example of a detail of the part according to the invention, and
FIG. 3 shows a signal diagram so that the subject matter of FIG. 2 can be more easily understood.
DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENT
The illustrative embodiment relates to a voltage regulator according to DE-PS 27 38 897, supplemented by the parts according to the invention. In FIG. 1, the input terminals of the voltage regulator, which carry the technical designations D+and D-, are designated by 10 and 11. Both terminals 10 and 11 are connected to lines 12 and 13 between which a voltage divider consisting of two resistors 14 and 15 is located. The tap of the voltage divider is conducted to the negative input of an operational amplifier 16 to the positive input of which a reference voltage source 17 is connected which, in turn, is again connected to the line 13. On the output side, the operational amplifier 16 is followed by a circuit block 18 which can comprise, for example, the threshold switch known from DE-PS pb 27 38 897 and the other elements of switching stage and amplifier. A subsequent switching transistor 20 is connected in series with an exciter winding 21 of a generator between the two lines 12 and 13. A freewheeling diode 22 is also located in parallel with the exciter winding 21.
25 designates an integrator which receives the switching signal to be integrated via its input 26 either from an output 28 of the circuit block 18 or from the junction of exciter winding 21 and switching transistor 20. The integrator 25 is followed by a function generator 29. The latter has either a voltage output 30 having a small internal resistance or a current output 31 having a very high internal resistance. The current output 31 must be connected to the negative input of the operational amplifier 16 or else the voltage output 30 in series with the reference source 17 at 32.
The operation of the basic system of the voltage regulator according to FIG. 1 is known, for example, from DE-PS 27 38 897 as already explained. The input signal between the two terminals 10 and 11 is referred to a reference value from the reference voltage source 17 by means of the operational amplifier 16 and, depending on the output signal of the latter, the circuit block 18 generates a clocked drive signal for the switching transistor 20 which, in turn, determines the current flow/current flow interval ratio. of the exciter winding 21 of the generator. The duty ratio of the exciter current is thus selected depending on the input signal between terminals 10 and 11 and
REFERENCES:
patent: 3868558 (1975-02-01), Winkley et al.
patent: 4233556 (1978-05-01), Nagel et al.
patent: 4555657 (1985-11-01), Kato et al.
patent: 4716355 (1987-12-01), Morishita et al.
Conzelmann Gerhard
Kohl Walter
Nagel Karl
Hickey R. J.
Robert & Bosch GmbH
Striker Michael J.
LandOfFree
Voltage regulator for a generator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Voltage regulator for a generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage regulator for a generator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-941766