DE966588C - Power generation plant for ships, especially for direct current - Google Patents

Description

ISSUED AUGUST 22, 1957

L19585 XI165t ¹

The invention relates to a power generation system for ships, in particular for direct current, with a prime mover and at least two power generators driven by this.

The Leonard method is mainly used for electrical DC screw drives. The ship's electrical system, which requires constant voltage, is made up of one or more fed by separate generators. Driving power generators and on-board power generators become firmly coupled to one another or connected via belt drives and shared by the Drive machine, for example a diesel engine, driven. This gives you an economical working main unit, which at the same time the power requirement when the ship is in motion for screw and electrical system covers.

The diesel engine is generally designed in its performance so that with normal driving with Nominal drive and on-board power of the diesel engine fully loaded with optimal efficiency is working. In contrast to the diesel engine, the power generators are then able, for example, for increased journey or for increased electrical system requirements, longer periods greater than the nominal value Deliver services. Furthermore, the on-board network requirement of a ship is naturally not constant, but rather can fluctuate within wide limits under certain circumstances. The size of this load fluctuation depends on the type and task

709 641/13

Claims (5)

of the ship, of its auxiliary machines and facilities, etc. In order to achieve a more even load on a marine propulsion engine that has both a compounded main generator with separately excited auxiliary windings as well as a bypass excited Drives auxiliary generator, it is known at the same time automatically 'when the Auxiliary generator reduces the shunt excitation of the ίο main engine by a certain fixed amount to decrease .. However, this previously known device does not prevent load fluctuations that occur after switching on of the auxiliary generator by changing the load on each of the two specified Generators occur and also does not act as overload protection of the prime mover in a extraordinary load on the auxiliary generator, as the shunt field of the main generator through Load changes on the auxiliary generator remain unaffected. In contrast, there is the invention, which also relates to a power generation plant for Ships, especially for direct current, with a propulsion engine and at least two of these powered generators that operate on separate networks, e.g. B. on the electrical system and that Driving network work, from an additional, from the load current of the one working on the network Generator traversed the excitation winding, which the power of the working on the other network The generator is influenced in such a way that the sum of the generator powers equals the nominal power of the prime mover not or not significantly 'exceeds. As a result, the requirements, on the one hand, an overload of the drive machine when there is an increased on-board network requirement to avoid, on the other hand, however, any residual power of the prime mover for the To exploit ship propulsion, as it is extremely, for example, for the return journey of fishing vessels important is met in a very simple way. In the drawing is an exemplary embodiment for such a system is shown schematically. The drive machine designated by 10 drives the drive generator 11 and the on-board network ' working power generator 12. The power generator 11 feeds the screw drive motor 13 and has in addition to the self-excitation winding 14, the main current winding 15 and for the Faihrstufenregeluing separately excited field 16 controlled by the speed controller (not shown) additional sturgeon resistance 17 caused by the load current of the power generator 12 is traversed with its self-excited winding 18. The field the winding 17 influences the performance of the traction generator 11 such that when fully excited Winding 16, d. H. when the drive lever is in the "full speed" position, the drive machine 10 is always at its Nominal power is fully loaded. Since the maneuvering of the jack drive is carried out by regulating or reversing the traction current generator field must be carried out simultaneously with the reversing of the traction generator field when reversing the screw Direction of the control field 17 can be changed. This can be done in two ways by one with the changeover contact that is coupled to the drive lever (not shown). This condition applies but only if the additional control winding 17 is placed in the traction generator 11. When influenced of the excitation field of the traction motor 13, a switchover is not necessary. Maneuvering "full back" is usually done 'For example, for the issue, only for a relatively short period of time or in the Danger trap. For this it is advisable that the maneuver be carried out in a short time with extreme machine power bed optimal reversal effect is carried out on the screw. Because this state However, if it only lasts for a short time, this maneuver can result in increased driving performance and overloading of the Drive machine 10 take place. In the present invention, this influencing of the driving control can be carried out in a simple manner take place in that when driving ahead in the traction generator 11 ais counter compound winding working additional excitation winding 17 is not switched when reversing to back, but now acts as a compound winding and thus additionally excites the traction generator 11, so that an increased reverse power is available is provided.· The drawing shows only one system with one of the drive machines 10 and two Generators 11 and 12 existing aggregate shown. The system can also consist of several together on one or more screw '' motors working units with one or more power generators working on the on-board network exist. Likewise, the power generator 12 feeding the vehicle electrical system, which is used in the present Example is designed so that it supplies a constant voltage, even a generator with a other characteristics. Furthermore, the system can also be designed so that the additional excitation winding influenced by the generator 12 acts on the excitation of the screw motor. HQ PATENT CLAIMS: i. Power generation system for ships, in particular for direct current, with a prime mover and at least two power generators driven by this, which are connected to separate networks, e.g. B. on the electrical system and the vehicle network, work, characterized in that an additional, from the load current of the power generator (12) operating on the network (12) through the excitation winding (17) provided iao LSt ₁ which depends on the load current, the performance of the other network working power generator (11) changed so that the sum of the power generator power does not exceed the nominal power of the drive machine (10) or does not significantly exceed. 2. Plant according to claim i, "characterized in that .that the additional excitation winding (17) the power generator working on the traction network ^ 11) is assigned and from the load current of the power generator working on the on-board network (12) is traversed. 3. Plant according to claim 1, characterized in that the additional excitation winding the traction motor (13) is assigned and from the load current of the working on the electrical system Generating electricity is flowed through. 4. Installation according to claim 2, characterized in that when reversing the traction generator field at the same time the additional excitation winding, z. B. by means of a drive switch actuated changeover contact is reversed. 5. System according to claim 2, characterized in that that when reversing the Fafarstromzaugerfeldes the additional excitation winding as a compound winding the company electricity generator additionally excited, so that an increased reverse power is available. Considered publications:
German Patent Nos. 482699, 604219; German patent application P 1994 VIIId / 21 d ² ; USA. Pat. No. 2,150,112. 1 sheet of drawings © 509 697/175 3.56 (709 641/15 8.57)