Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied
Reexamination Certificate
1999-03-18
2001-04-17
Ponomarenko, Nicholas (Department: 2834)
Electricity: single generator systems
Automatic control of generator or driving means
Voltage of generator or circuit supplied
C322S019000, C322S029000
Reexamination Certificate
active
06218814
ABSTRACT:
SUMMARY
The device for voltage regulation according to the invention, for an externally excited generator driven by an internal combustion engine has the advantage that the number of voltage incursions that occur after powerful electric consumers are turned on is reduced markedly compared with known systems. This advantage is attained in that the load response travel function, which is activated while driving, is blocked under certain conditions. These conditions pertain to detecting an rpm reduction; when the rpm is falling, the load response travel function is blocked, and as a result a rapid rise in the exciting current is obtained, which leads to a power output on the part of the generator that prevents a voltage incursion. At a constant rpm or at increasing rpm, the load response travel function conversely remains activated, and it prevents the braking moment of the generator to the engine from rising when powerful consumers are turned on.
Further advantages of the invention will become apparent from the provisions recited in the dependent claims. It is especially advantageous that to determine the rpm, the phase signal of the generator is evaluated. To that end, it is not absolutely necessary to evaluate the engine crankshaft rpm, but it may nevertheless be advantageous under certain circumstances to evaluate the crankshaft rpm, or to take it jointly into account.
It is also advantages that the evaluation means that enable the deactivation of the load response travel function upon an rpm reduction can be realized as a very simple circuit, with only a few electronic components. A feature that can be achieved with the aid of special logic makes it possible to integrate the entire function in a microprocessor. With the features proposed, it is assured in each case that voltage incursions when loads are turned on will occur only if they are technologically absolutely indispensable, or absolutely unavoidable.
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Kohl Walter
Mittag Rainer
Nasswetter Guenter
Suelzle Helmut
Ponomarenko Nicholas
Robert & Bosch GmbH
Striker Michael J.
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