Synchronous generator

FIELD: electricity.

SUBSTANCE: synchronous generator contains rotor with excitation winding, stator with primary winding which is connected to load by its phase leads and to voltage divisor via first three-phase bridge rectifier. Voltage divisor is connected to input of discrete control circuit. Additional stator winding is connected to molecular power storage unit via second three-phase bridge rectifier. Power storage unit is connected with input of three-phase voltage inverter. Inverter output is connected to load and to primary winding. Rotor excitation winding is connected to dc power supply via regulating element, for instance, transistor. Additional and primary windings of stator have mutual offset of 90 electrical degrees. Phase voltages of these windings are equal. Storage unit for corresponding voltage and power is used as molecular power storage unit. Three-phase voltage inverter can include PDM (pulse-duration modulation) or PDC (pulse-duration control) of frequency and voltage stabilisation.

EFFECT: widening of source functionality due to connection of kinetic load with comparable power.

2 cl, 1 dwg

 

The invention relates to electrical engineering and can be used for the design of synchronous machines of small and average capacity, mainly generators for stand-alone power plants.

Known synchronous generator (A.S. USSR №868937, NC 19/34, 1981), which contains the basic and additional three-phase stator windings. The rotor is placed primary and secondary winding. The main three-phase stator winding through the first three-phase bridge rectifier one phase pins connected to the secondary winding excitation. Two-phase output windings of the load is connected through rectifier feedback and a voltage divider connected to the input of a regulating element with discrete control circuitry, and power output of the latter is connected between one output filter capacitor and the first output of the primary winding. The second conclusion of this winding is connected to another output filter capacitor, and an additional three-phase stator winding is connected to the input of the second three-phase bridge rectifier, the output of which is connected to the specified filter capacitor.

The disadvantage of this synchronous generator is the fact that an additional stator winding feeding the primary winding has a small number of turns, therefore, some m is Shui EMF, insufficient for reliable self-excitation of the generator. On the other hand, in the initial moment of time the braking element (transistor) is closed, its resistance is high, and that prevents excitation.

The closest technical solution is a synchronous generator (Patent RU 2107378 NC 19/30, NR 9/30. Publ. 20.03.98, bull. No. 8), containing primary and secondary windings of the stator are displaced one relative to the other 90 El. degrees, the excitation winding, the first and second three-phase bridge rectifiers, discrete control scheme with the regulatory element, the voltage divider.

The disadvantage of this synchronous generator is the difficulty of manufacturing the rotor and additional devices for reliable excitation.

The technical solution of the task is the extension of functionality by connecting the motor load commensurate with the power generator.

The task is achieved by the synchronous generator, containing primary and secondary windings of the stator are displaced one relative to the other 90 El. degrees, the excitation winding, the first and second three-phase bridge rectifiers, discrete control circuit with a regulating element, a voltage divider, contains molecular energy storage device and the three-phase voltage inverter, with the main stator winding phase pins connected to the load and through the first three-phase bridge rectifier to the voltage divider, which is connected to the input of a discrete control circuit with a regulating element, additional stator winding its phase conclusions through the second three-phase bridge rectifier is connected with the molecular energy storage, and the last to the input three-phase voltage inverter, the output of which is connected to the load and phase conclusions the primary winding, the excitation winding of the rotor through a regulatory element of a discrete control circuit connected to the constant current source and voltage source inverter contains its internal structure, such as PWM, or SHEAR stabilization of voltage and frequency.

The novelty of the claimed technical solution due to design features due to the fact that synchronous generator contains molecular energy storage device and the three-phase voltage inverter, with the main stator winding phase pins connected to the load and through the first three-phase bridge rectifier to the voltage divider, which is connected to the input of a discrete control circuit with a regulating element, additional stator winding its phase conclusions through the second three-phase bridge rectifier is connected with the molecular energy storage, and the last to the input three-phase voltage inverter, the output of which is connected to the load and phase pins osnovnoskolci, the excitation winding of the rotor through a regulatory element of a discrete control circuit connected to the constant current source and voltage source inverter contains its internal structure, such as PWM or SHEAR stabilization of voltage and frequency.

According to scientific-technical and patent literature authors unknown to the claimed combination of features, aimed at the achievement of the task, and this decision does not follow clearly from the prior art, which allows to make a conclusion about compliance solutions to the invention level.

The proposed solution is industrially applicable because it is healthy and encouraged its use in industry.

The invention is illustrated in the drawing, which shows a schematic diagram of the synchronous generator.

The synchronous generator has a rotor with a field winding 1, a stator 2 with the main winding 3, which phase pins connected to the load 4 (a, b, C) and through the first three-phase bridge rectifier 5 to the voltage divider 6, which is connected to the input of a discrete control circuit 7, the additional winding 8 of the stator 2 of its phase conclusions through the second three-phase bridge rectifier 9 is connected with the molecular energy storage device 10, and the last to the input three-phase voltage inverter 11, the output to the th is connected to the load 4 and phase conclusions the primary winding 3, the excitation winding of the rotor 1 through a regulatory element (e.g. a transistor) is connected to the constant current source "plus" "minus".

The additional winding 8 and the primary winding 3 of the stator 2 are displaced one relative to the other 90 El. degrees. Phase voltage of these windings are equal. As the molecular energy accumulator 10 use hard drives to the appropriate voltage and energy.

Three-phase voltage inverter 11 includes its internal structure, such as PWM or SHEAR stabilization of voltage and frequency.

Synchronous generator operates as follows. At a certain rotation frequency of the rotor 1 due to residual magnetic flux and the flux from the field winding of the rotor 1 EMF induced in the phase windings 3, 8 of the stator 2.

Output voltage a, b, C through the first three-phase bridge rectifier 5, the voltage divider 6 is fed to the input of a discrete control circuit 7.

Regulatory element (e.g. a transistor) 12 is proportional to the feedback signal from the voltage divider 6 changes the control current in the winding of the rotor 1, thereby stabilizing the output voltage of the windings 3, 8 of the stator 2.

Simultaneously, the additional voltage winding 8 is rectified second three-phase bridge rectifier 9 and energizes the molecular energy storage device 10. This voltage is constantly what about the current supplied to the three-phase voltage source inverter and is converted in a main frequency of the synchronous generator. The internal structure of the inverter stabilizes the output voltage and frequency.

Thus, three-phase frequency inverter 11 and the primary winding 3 of the stator are parallel to the load 4.

When connecting the load 4 to the terminals a, b, C are two channels of voltage and frequency.

The first channel. When connecting a load across the terminals a, b, C voltage decreases. Reduced feedback and the voltage divider 6.

Regulatory element (e.g. a transistor) 12 increases the control current in the excitation winding of the rotor 1 increases the magnetic flux and the voltage at the output of the primary winding 3 increases.

The second channel stabilization. When the voltage at the terminals a, b, C (especially when you start asynchronous motors or loads commensurate with the power of the generator) the internal structure of the inverter 11, such as PWM or SHIRE, automatically stabilizes voltage, but due to molecular energy accumulator 10 is reduced failure frequency of rotation of a drive motor, thereby stabilished and frequency of the synchronous generator.

The advantage of the proposed solution is that due to molecular energy storage and phase of the frequency inverter is voltage and frequency generator, which can supply the load with the measurable capacity of the generator.

The bias windings 90 El. degrees reduces their influence on each other in transient conditions

1. Synchronous generator containing primary and secondary windings of the stator are displaced relative to one another by 90 El. degrees, the excitation winding, the first and second three-phase bridge rectifiers, discrete control circuit with a regulating element, a voltage divider, characterized in that it contains molecular energy storage device and the three-phase voltage inverter, with the main stator winding phase pins connected to the load and through the first three-phase bridge rectifier to the voltage divider, which is connected to the input of a discrete control circuit with a regulating element, additional stator winding its phase conclusions through the second three-phase bridge rectifier is connected with the molecular energy storage, and the last to the input three-phase voltage inverter, the output of which is connected to the load and phase conclusions the primary winding stator excitation winding of the rotor through a regulatory element of a discrete control circuit connected to the constant current source.

2. Synchronous generator according to claim 1, characterized in that the three-phase voltage inverter contains its internal structure, for example, PWM or SHEAR stabilization of voltage and frequency.



 

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