CN110601619B - Mixed excitation flywheel pulse synchronous generator system - Google Patents

Mixed excitation flywheel pulse synchronous generator system Download PDF

Info

Publication number
CN110601619B
CN110601619B CN201910894408.0A CN201910894408A CN110601619B CN 110601619 B CN110601619 B CN 110601619B CN 201910894408 A CN201910894408 A CN 201910894408A CN 110601619 B CN110601619 B CN 110601619B
Authority
CN
China
Prior art keywords
excitation
generator
input
synchronous generator
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910894408.0A
Other languages
Chinese (zh)
Other versions
CN110601619A (en
Inventor
寇宝泉
张浩泉
赵元胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin Institute of Technology
Original Assignee
Harbin Institute of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harbin Institute of Technology filed Critical Harbin Institute of Technology
Priority to CN201910894408.0A priority Critical patent/CN110601619B/en
Publication of CN110601619A publication Critical patent/CN110601619A/en
Application granted granted Critical
Publication of CN110601619B publication Critical patent/CN110601619B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/04—Windings on magnets for additional excitation ; Windings and magnets for additional excitation
    • H02K21/042—Windings on magnets for additional excitation ; Windings and magnets for additional excitation with permanent magnets and field winding both rotating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/02—Additional mass for increasing inertia, e.g. flywheels
    • H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/20—Structural association with auxiliary dynamo-electric machines, e.g. with electric starter motors or exciters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2103/00—Controlling arrangements characterised by the type of generator
    • H02P2103/20—Controlling arrangements characterised by the type of generator of the synchronous type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)

Abstract

A hybrid excitation flywheel pulse synchronous generator system belongs to the technical field of motors and power electronics. The problems that an existing flywheel pulse generator set is long in shaft system of the whole generator set and low in power density and reliability of the system are solved. The invention mainly comprises an input inverter, an input motor, an excitation inverter, an excitation generator, an excitation rectifier, a mixed excitation multiphase synchronous generator and an output rectifier. The invention can be used as a large-capacity pulse power supply and is applied to the fields of nuclear fusion test technology, plasma, electromagnetic emission technology and the like.

Description

Mixed excitation flywheel pulse synchronous generator system
Technical Field
The invention belongs to the technical field of motors and power electronics.
Background
The flywheel pulse generator is a flywheel energy storage device which utilizes the large inertia storage energy of a shafting and realizes electromechanical energy conversion by a coaxial motor/generator. Flywheel energy storage devices currently in use or under development are of two types: the first is that the power grades of energy storage and energy release are equivalent, the motor and the power generation function can be alternately realized by one motor, and the magnetic suspension flywheel energy storage system with medium and small capacity is of the type, has the characteristics of compact structure, high efficiency and the like, and is generally used as a flywheel battery; the second is that the energy storage power is smaller than the energy release power by more than one order of magnitude, two motors respectively realize the functions of electric drive and power generation, and a large-capacity alternating current pulse generator set is of the type, stores energy for a long time with small power, releases energy for a short time with large power, is generally used as a large-capacity pulse power supply, and can be applied to the fields of controlled nuclear fusion tests, nuclear explosion simulation, high-current particle beam accelerators, high-power pulse lasers, high-power microwaves, plasmas, electromagnetic emission technologies and the like.
The structure of a typical flywheel pulse generator system is shown in fig. 1. The basic working principle of the system is as follows: when the system is charged, an external power grid supplies energy to the system, a power converter formed by power electronic devices controls and drives a motor to drive a flywheel to rotate at a high speed, the flywheel can run at a constant high speed, the required energy is stored in a kinetic energy mode, and conversion from electric energy to mechanical energy and energy storage are completed. When the pulse load needs to supply power, the flywheel rotating at a high speed is used as a prime mover to drive the motor to generate power and operate, and the voltage and the current suitable for the pulse load are output through the power electronic converter to finish the energy conversion process.
The traditional pulse generator set usually adopts a structural form of 'motor-flywheel-generator'. The driving motor usually adopts a three-phase induction motor, while the pulse engine usually adopts a multiphase non-salient pole synchronous generator, the motor and the generator rotate coaxially, and an inertia flywheel is arranged on a rotating shaft of the generator. The flywheel and the generator are connected by a rigid coupling, the motor and the flywheel are connected flexibly, and the unit is provided with a plurality of bearings for supporting the rotor.
However, the flywheel pulse generator set has the following disadvantages: the whole unit has long shafting, low rotating speed, low power density, low energy density and large volume weight; the rotor of the pulse generator is provided with an excitation winding, and a multi-stage rotating rectifier is adopted for excitation, so that the system is low in reliability and high in cost, and is not suitable for being used in a mobile platform. Therefore, the above problems need to be solved.
Disclosure of Invention
The invention provides a mixed excitation flywheel pulse synchronous generator system, which aims to solve the problems of long shafting of the whole generator set and low power density and reliability of the system in the existing flywheel pulse generator set.
The first structure is as follows:
the hybrid excitation flywheel pulse synchronous generator system comprises an input inverter, an input motor/generator, an excitation inverter, an excitation generator, an excitation rectifier, a hybrid excitation multiphase synchronous generator, an output rectifier and an input rectifier;
the input motor/generator is realized by adopting a permanent magnet synchronous motor, and a set of output power windings are wound on a stator of the input motor/generator;
a set of output power windings are arranged on a stator of the hybrid excitation multiphase synchronous generator;
the input end of the input inverter is connected with a power grid, the alternating current output end of the input inverter is connected with the power input end of the input motor/generator, the outgoing line of the output power winding of the input motor/generator is connected with the input end of the input rectifier, and the output end of the input rectifier is connected with the input end of the excitation inverter;
the output end of the excitation inverter is connected with a stator winding outgoing line of the excitation generator, a rotor winding outgoing line of the excitation generator is connected with an alternating current input end of an excitation rectifier, a direct current output end of the excitation rectifier is connected with a rotor excitation winding input end of the hybrid excitation multiphase synchronous generator, an output power winding output end of the hybrid excitation multiphase synchronous generator is connected with an alternating current input end of an output rectifier, and direct current output by the output rectifier is used for supplying power to a pulse load;
the rotor of the input motor/generator is coaxially connected with the rotor of the excitation generator and the rotor of the mixed excitation multiphase synchronous generator in sequence.
The second structure is as follows:
the mixed excitation flywheel pulse synchronous generator system comprises an input inverter, an input motor, an excitation inverter, an excitation generator, an excitation rectifier, a mixed excitation multiphase synchronous generator, an output rectifier and an inertia flywheel;
a set of output power windings are arranged on a stator of the hybrid excitation multiphase synchronous generator;
the input end of the input inverter is connected with a power grid, and the output end of the input inverter is connected with an outgoing line of an output power winding of the input motor;
the input end of the excitation inverter is connected with a power grid, the output end of the excitation inverter is connected with a stator winding outgoing line of the excitation generator, a rotor winding outgoing line of the excitation generator is connected with an alternating current input end of an excitation rectifier, a direct current output end of the excitation rectifier is connected with a rotor excitation winding input end of the hybrid excitation multiphase synchronous generator, an output power winding output end of the hybrid excitation multiphase synchronous generator is connected with an alternating current input end of an output rectifier, and direct current output by the output rectifier is used for supplying power to a pulse load;
the rotor of the input motor is coaxially connected with the rotor of the excitation generator and the rotor of the mixed excitation multiphase synchronous generator in sequence.
A third structure:
the hybrid excitation flywheel pulse synchronous generator system comprises an input inverter, an input motor/generator, an input rectifier, an excitation inverter, an excitation generator, a hybrid excitation multiphase synchronous generator, an excitation rectifier and an output rectifier;
a set of output power windings are wound on a stator of the hybrid excitation multiphase synchronous generator;
the input motor/generator is realized by adopting a permanent magnet synchronous motor or an induction motor, and two sets of windings, namely an input power winding and an output power winding, are arranged on a stator of the input motor/generator;
the input end of the input inverter is connected with a power grid, the output end of the input inverter is connected with an outgoing line of an input power winding of the input motor/generator, an outgoing line of an output power winding of the input motor/generator is connected with the alternating current input end of the input rectifier, and the direct current output end of the input rectifier is connected with the input end of the excitation inverter;
the output end of the excitation inverter is connected with a stator winding outgoing line of the excitation generator, a rotor winding outgoing line of the excitation generator is connected with an alternating current input end of an excitation rectifier, a direct current output end of the excitation rectifier is connected with a rotor excitation winding input end of the hybrid excitation multiphase synchronous generator, an output power winding output end of the hybrid excitation multiphase synchronous generator is connected with an alternating current input end of an output rectifier, and direct current output by the output rectifier is used for supplying power to a pulse load;
the rotor of the input motor/generator is coaxially connected with the rotor of the excitation generator and the rotor of the hybrid excitation multiphase synchronous generator in turn.
A fourth configuration:
the mixed excitation flywheel pulse synchronous generator system comprises an input inverter, an excitation generator, an excitation rectifier, an output rectifier, a mixed excitation multiphase synchronous generator and an inertia flywheel;
the stator of the mixed excitation multiphase synchronous generator is provided with two sets of windings, namely an input power winding and an output power winding;
the input end of the input inverter is connected with a power grid, and the output end of the input inverter is connected with an outgoing line of an input power winding of the hybrid excitation multiphase synchronous generator;
the input end of the excitation inverter is connected with a power grid, the output end of the excitation inverter is connected with a stator winding outgoing line of the excitation generator, a rotor winding outgoing line of the excitation generator is connected with the alternating current input end of the excitation rectifier, and the direct current output end of the excitation rectifier is connected with the rotor excitation winding input end of the mixed excitation multiphase synchronous generator;
an outgoing line of an output power winding of the hybrid excitation multiphase synchronous generator is connected with an alternating current input end of an output rectifier, and direct current output by the output rectifier is used for supplying power to a pulse load;
the rotor of the excitation generator is coaxially connected with the rotor of the hybrid excitation multiphase synchronous generator.
Preferably, in the generator system of one of the four generator systems, a first preferred structure of the rotor of the hybrid excitation multiphase synchronous generator is: the rotor of the hybrid excitation multiphase synchronous generator comprises a rotor core, an excitation winding and an excitation permanent magnet;
the rotor core comprises main pole teeth and a yoke core, and the main pole teeth are uniformly arranged on the outer surface of the yoke core along the circumferential direction;
each main pole tooth is wound with an excitation coil, and all the excitation coils are connected in series to form an excitation winding;
along the circumferential direction, an excitation permanent magnet is embedded between two adjacent main pole teeth, and the excitation permanent magnet is magnetized tangentially; and along the circumferential direction, the magnetizing directions of two adjacent excitation permanent magnets are opposite.
In a first preferred structure of the rotor of the hybrid excitation multiphase synchronous generator, further, the excitation permanent magnet has a strip-shaped structure.
Preferably, in the generator system of one of the four generator systems, a second preferred structure of the rotor of the hybrid excitation multiphase synchronous generator is: the rotor of the hybrid excitation multiphase synchronous generator comprises a rotor core, an excitation winding and an excitation permanent magnet;
the rotor core comprises main pole teeth and a yoke core, and the main pole teeth are uniformly arranged on the outer surface of the yoke core along the circumferential direction;
n axial holes are formed in the pole shoe of each main pole tooth along the axial direction, the n axial holes in each main pole tooth are sequentially arranged along the circumferential direction, and n is a positive integer;
the magnetic bridges are arranged between every two adjacent axial holes, the circumferential width of each magnetic bridge is larger than or equal to 1mm, an excitation permanent magnet is embedded in each axial hole, the excitation permanent magnets are magnetized in the radial direction or in parallel, the magnetizing directions of the excitation permanent magnets on each main pole tooth are the same, and the magnetizing directions of the excitation permanent magnets on the adjacent main pole teeth are opposite.
In a second preferred structure of the rotor of the hybrid excitation multiphase synchronous generator, further, the radial section of the axial hole is trapezoidal, fan-shaped or rectangular.
The mixed excitation flywheel pulse synchronous generator system of one of the four generator system structures further comprises an inertia flywheel, a rotor of the mixed excitation multiphase synchronous generator is coaxially connected with the inertia flywheel, and the mixed excitation multiphase synchronous generator is positioned between the rotor of the excitation generator and the inertia flywheel.
The invention has the beneficial effects that the invention relates to a mixed excitation flywheel pulse synchronous generator system, the generator adopts an electromagnetic structure that DC current controls an air gap magnetic field and mixed excitation of electric excitation and a permanent magnet, and an additional air gap is not arranged in an electric excitation magnetic flux path, so that the excitation power is small and the system efficiency is high; the air gap magnetic field is simple to adjust and large in adjusting range, so that the system can output wider voltage adjusting capability or wide-range variable-speed constant-voltage output capability, and the overload capability of the system is strong; and the rotor does not have brush, slip ring, make rotor simple structure, intensity high, the reliability is strong, is fit for high-speed operation, and power density is high, energy storage density is high, and the motor is small under same power, energy storage index.
When the rotor inertia of all the motors in the hybrid excitation flywheel pulse synchronous generator system is large enough, an inertia flywheel can be omitted, a unit shafting is further shortened, and the power density and the energy density of the motor system are further improved. The flywheel and the rotor can be combined into a whole, and the integration of electric drive and power generation can be realized.
The hybrid excitation flywheel pulse synchronous generator system has the characteristics of small excitation power, high efficiency, small voltage regulation rate, strong overload capacity, high reliability and the like as a flywheel energy storage system, can be used as a high-capacity pulse power supply, and has good application prospects in the fields of nuclear fusion test technology, plasma, electromagnetic emission technology and the like.
Drawings
FIG. 1 is a schematic diagram of a flywheel pulse generator system in the prior art;
FIG. 2 is an electrical schematic diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 1;
FIG. 3 is a mechanical transmission relationship diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 1;
FIG. 4 is a schematic diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 2;
FIG. 4a is an electrical schematic diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 2;
FIG. 4b is a mechanical transmission relationship diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 2;
FIG. 5 is a schematic diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 3;
FIG. 5a is an electrical schematic diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 3;
FIG. 5b is a mechanical transmission relationship diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 3;
FIG. 6 is a schematic diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 4;
FIG. 6a is an electrical schematic diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 4;
FIG. 6b is a mechanical transmission relationship diagram of a hybrid excitation flywheel pulse synchronous generator system according to embodiment 4;
FIG. 7 is a first structural diagram of a rotor of a hybrid excitation multiphase synchronous generator;
fig. 8 is a second structure diagram of the rotor of the hybrid excitation multiphase synchronous generator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Example 1:
referring to fig. 2 to explain the present embodiment 1, the hybrid excitation flywheel pulse synchronous generator system described in the present embodiment 1 includes an input inverter 1, an input motor/generator 2, an excitation inverter 3, an excitation generator 4, an excitation rectifier 5, a hybrid excitation multiphase synchronous generator 6, an output rectifier 7, and an input rectifier 8;
the input motor/generator 2 is realized by adopting a permanent magnet synchronous motor, and a set of output power windings are wound on a stator of the input motor/generator;
a set of output power windings are arranged on a stator of the mixed excitation multiphase synchronous generator 6;
the input end of the input inverter 1 is connected with a power grid, the alternating current output end of the input inverter 1 is connected with the power input end of the input motor/generator 2, the outgoing line of the output power winding of the input motor/generator 2 is connected with the input end of the input rectifier 8, and the output end of the input rectifier 8 is connected with the input end of the excitation inverter 3;
the output end of the excitation inverter 3 is connected with a stator winding outgoing line of an excitation generator 4, a rotor winding outgoing line of the excitation generator 4 is connected with an alternating current input end of an excitation rectifier 5, a direct current output end of the excitation rectifier 5 is connected with a rotor excitation winding input end of a mixed excitation multiphase synchronous generator 6, an output power winding output end of the mixed excitation multiphase synchronous generator 6 is connected with an alternating current input end of an output rectifier 7, and direct current output by the output rectifier 7 is used for supplying power to a pulse load;
the rotor of the input motor/generator 2 is coaxially connected with the rotor of the excitation generator 4 and the rotor of the hybrid excitation multiphase synchronous generator 6 in turn. In this embodiment 1, the power grid may be an ac power grid or a dc power grid, when the power grid is an ac power grid, the input inverter 1 is an inverter with a rectification function, and after rectifying and inverting the received ac power, the inverter with the rectification function supplies power to the input motor/generator 2 through the electric energy output from the ac output terminal thereof; when the power grid is a direct current power grid, the input inverter 1 directly converts the received direct current into alternating current, and the electric energy output by the alternating current output end of the input inverter 1 is used for supplying power to the input motor/generator 2.
The working principle is as follows: the hybrid excitation flywheel pulse synchronous generator system is used as a flywheel energy storage system, the power supply end of an input motor/generator 2 is connected with a power grid, firstly, in the electric stage, the input motor/generator 2 is used as a motor, and an excitation generator 4 and a hybrid excitation multiphase synchronous generator 6 which are coaxially connected with the input motor/generator are accelerated. When the system rotating speed reaches the rated rotating speed, the input motor/generator 2 cuts off the electrical connection relation with the power grid, the input motor/generator 2 is used as a generator, the system enters a power generation stage, at the moment, the excitation generator 4 works as an exciter, the current of a rotor winding of the exciter passes through an excitation rectifier 5 and then is led into a rotor excitation winding of the hybrid excitation multiphase synchronous generator 6, the hybrid excitation multiphase synchronous generator 6 is excited, induced electromotive force is generated in an output power winding on a stator of the hybrid excitation multiphase synchronous generator 6, and the current can be provided for a load after being connected with the rectifier.
In the prior art, a multi-stage excitation generator is generally adopted to perform excitation power supply on a hybrid excitation multi-phase synchronous generator 6, and most of the multi-stage excitation multi-phase synchronous generator adopts 3 stages, but in the embodiment 1, as the permanent magnet of the hybrid excitation multi-phase synchronous generator 6 can provide part of excitation, which is equivalent to the function of an excitation generator, an excitation generator is also arranged in the synchronous generator system to perform excitation power supply on the hybrid excitation multi-phase synchronous generator 6, so that compared with the 3-stage excitation power supply in the prior art, the embodiment 1 can omit an excitation generator, the invention reduces the number of the excitation generators, and the length of a unit shafting is shortened from multi-stage to single-stage. Thereby improving power density and energy density.
The mixed excitation multiphase synchronous generator 6 adopts the electromagnetic structure that the direct current controls the air gap magnetic field and the mixed excitation of the electric excitation and the permanent magnet, and the electric excitation magnetic flux path has no additional air gap, so that the excitation power is small and the system efficiency is high; the invention has simple air gap magnetic field regulation and large regulation range, and enables the system to output wider voltage regulation capability or wide-range variable speed constant voltage output capability.
Example 2:
referring to fig. 4a to explain the present embodiment 2, the hybrid excitation flywheel pulse synchronous generator system described in the present embodiment 2 includes an input inverter 1, an input motor 2, an excitation inverter 3, an excitation generator 4, an excitation rectifier 5, a hybrid excitation multiphase synchronous generator 6, an output rectifier 7 and an inertia flywheel;
a set of output power windings are arranged on a stator of the mixed excitation multiphase synchronous generator 6;
the input end of the input inverter 1 is connected with a power grid, and the output end of the input inverter 1 is connected with an outgoing line of an output power winding of the input motor 2;
the input end of an excitation inverter 3 is connected with a power grid, the output end of the excitation inverter 3 is connected with a stator winding outgoing line of an excitation generator 4, a rotor winding outgoing line of the excitation generator 4 is connected with an alternating current input end of an excitation rectifier 5, a direct current output end of the excitation rectifier 5 is connected with a rotor excitation winding input end of a hybrid excitation multiphase synchronous generator 6, an output power winding output end of the hybrid excitation multiphase synchronous generator 6 is connected with an alternating current input end of an output rectifier 7, and direct current output by the output rectifier 7 is used for supplying power to a pulse load;
the rotor of the input motor 2 is coaxially connected to the rotor of the excitation generator 4 and the rotor of the hybrid excitation multiphase synchronous generator 6 in turn.
The working principle is as follows: the hybrid excitation flywheel pulse synchronous generator system is used as a flywheel energy storage system, the input end of an excitation generator 4 is connected with a power grid, the power grid provides excitation electric energy for the excitation generator 4 to enable the excitation generator 4 to generate an excitation magnetic field, on the other hand, the power grid also provides starting electric energy for the operation of an input motor 2, in the specific working process of the system, the power supply end of the input motor/generator 2 is connected into the power grid, firstly, in the electric stage, the input motor/generator 2 is used as a motor to enable the excitation generator 4 and the hybrid excitation multiphase synchronous generator 6 which are coaxially connected with the input motor/generator to accelerate. When the system speed reaches the rated speed, the input motor/generator 2 cuts off the electrical connection relation with the power grid, the system enters the power generation stage, at this time, the exciter generator 4 works as an exciter, three-phase current is introduced into the exciter stator winding, the exciter generator 4 rotating at high speed cuts the air gap magnetic field, induced electromotive force is generated in the exciter rotor winding, induced current is further generated, the exciting current is directly introduced into the mixed excitation multiphase synchronous generator rotor exciting winding through the exciting rectifier 5, the excitation of the mixed excitation multiphase synchronous generator 6 is realized, the induced electromotive force is generated in the output power winding on the mixed excitation multiphase synchronous generator 6 stator, and current can be provided for a load after the rectifier is connected.
In the prior art, a 3-stage excitation generator is usually adopted to perform excitation power supply on a hybrid excitation multiphase synchronous generator 6, but in the embodiment 2, because the hybrid excitation multiphase synchronous generator 6 generates power in a hybrid excitation mode, because a permanent magnet of the hybrid excitation multiphase synchronous generator 6 can provide part of excitation, the hybrid excitation multiphase synchronous generator plays a role of an excitation generator, and the excitation power is reduced, but an excitation generator is also arranged in the synchronous generator system to perform excitation power supply on the hybrid excitation multiphase synchronous generator 6, so that compared with the 3-stage excitation power supply in the prior art, the embodiment 1 can omit an excitation generator, the invention reduces the number of the excitation generators, and shortens the shafting length of a unit from multiple stages to single stage. Thereby improving power density and energy density.
The mixed excitation multiphase synchronous generator 6 adopts the electromagnetic structure that the direct current controls the air gap magnetic field and the mixed excitation of the electric excitation and the permanent magnet, and the electric excitation magnetic flux path has no additional air gap, so that the excitation power is small and the system efficiency is high; the invention has simple air gap magnetic field regulation and large regulation range, and enables the system to output wider voltage regulation capability or wide-range variable speed constant voltage output capability.
Example 3:
referring to fig. 5a to explain the present embodiment 3, the hybrid excitation flywheel pulse synchronous generator system described in the present embodiment 3 includes an input inverter 1, an input motor/generator 2, an input rectifier 3, an excitation inverter 4, an excitation generator 5, a hybrid excitation multiphase synchronous generator 6, an excitation rectifier 7 and an output rectifier 8;
a set of output power windings are wound on a stator of the hybrid excitation multiphase synchronous generator 6;
the input motor/generator 2 is realized by adopting a permanent magnet synchronous motor, and the stator of the input motor/generator is provided with two sets of windings which are an input power winding and an output power winding respectively;
the input end of the input inverter 1 is connected with a power grid, the output end of the input inverter 1 is connected with an outgoing line of an input power winding of the input motor/generator 2, an outgoing line of an output power winding of the input motor/generator 2 is connected with an alternating current input end of an input rectifier 3, and a direct current output end of the input rectifier 3 is connected with an input end of an excitation inverter 4;
the output end of the excitation inverter 4 is connected with a stator winding outgoing line of the excitation generator 5, a rotor winding outgoing line of the excitation generator 5 is connected with an alternating current input end of an excitation rectifier 7, a direct current output end of the excitation rectifier 7 is connected with a rotor excitation winding input end of the hybrid excitation multiphase synchronous generator 6, an output power winding output end of the hybrid excitation multiphase synchronous generator 6 is connected with an alternating current input end of an output rectifier 8, and direct current output by the output rectifier 8 is used for supplying power to a pulse load;
the rotor of the input motor/generator 2 is coaxially connected in turn with the rotor of the excitation generator 5 and the rotor of the hybrid excitation multiphase synchronous generator 6.
The working principle is as follows: the hybrid excitation flywheel pulse synchronous generator system is used as a flywheel energy storage system, the power supply end of an input motor/generator 2 is connected to a power grid to provide starting electric energy for the operation of the input motor/generator 2, and firstly, in the electric stage, the input motor/generator 2 is used as a motor to accelerate an excitation generator 5 and a hybrid excitation multiphase synchronous generator 6 which are coaxially connected with the input motor/generator. When the system rotating speed reaches the rated rotating speed, the input motor/generator 2 cuts off the electrical connection relation with the power grid, the input motor/generator 2 is used as a generator, the input motor/generator 2 is used as a motor to provide electric energy for the excitation generator 5, the system enters a power generation stage, at the moment, the excitation generator 5 works as an exciter, the rotor winding current of the exciter passes through the excitation rectifier 4 and then is led into the rotor excitation winding of the hybrid excitation multiphase synchronous generator 6, the excitation of the hybrid excitation multiphase synchronous generator 6 is realized, induced electromotive force is generated in an output power winding on the stator of the hybrid excitation multiphase synchronous generator 6, and the current can be provided for a load after the rectifier is connected.
In the embodiment 3, as in the embodiments 1 and 2, the multi-stage excitation is changed into the single-stage excitation, the whole system has a simple structure, and the length of the shafting of the unit is shortened, so that the power density and the energy density are improved.
The mixed excitation multiphase synchronous generator 6 adopts the electromagnetic structure that the direct current controls the air gap magnetic field and the mixed excitation of the electric excitation and the permanent magnet, and the electric excitation magnetic flux path has no additional air gap, so that the excitation power is small and the system efficiency is high; the invention has simple air gap magnetic field regulation and large regulation range, and enables the system to output wider voltage regulation capability or wide-range variable speed constant voltage output capability.
Example 4:
referring to fig. 6a to explain the present embodiment 4, the hybrid excitation flywheel pulse synchronous generator system described in the present embodiment 4 includes an input inverter 1, an excitation inverter 2, an excitation generator 3, an excitation rectifier 4, an output rectifier 5, a hybrid excitation multiphase synchronous generator 6, and an inertia flywheel;
the stator of the mixed excitation multiphase synchronous generator 6 is provided with two sets of windings, namely an input power winding and an output power winding;
the input end of the input inverter 1 is connected with a power grid, and the output end of the input inverter 1 is connected with an outgoing line of an input power winding of the hybrid excitation multiphase synchronous generator 6;
the input end of the excitation inverter 2 is connected with a power grid, the output end of the excitation inverter 2 is connected with a stator winding outgoing line of the excitation generator 3, a rotor winding outgoing line of the excitation generator 3 is connected with an alternating current input end of an excitation rectifier 4, and a direct current output end of the excitation rectifier 4 is connected with a rotor excitation winding input end of a hybrid excitation multiphase synchronous generator 6;
an outgoing line of an output power winding of the hybrid excitation multiphase synchronous generator 6 is connected with an alternating current input end of the output rectifier 5, and direct current output by the output rectifier 5 is used for supplying power to a pulse load;
the rotor of the excitation generator 3 is coaxially connected with the rotor of the hybrid excitation multiphase synchronous generator 6.
The working principle is as follows: the hybrid excitation flywheel pulse synchronous generator system is used as a flywheel energy storage system, the power supply ends of a hybrid excitation multiphase synchronous generator 6 and an excitation generator 3 are both connected to a power grid, and firstly, in the electric stage, the input inverter 1 is connected with an input power winding of the hybrid excitation multiphase synchronous generator 6, so that the excitation generator 3 coaxially connected with the hybrid excitation multiphase synchronous generator 6 is accelerated. When the system rotating speed reaches the rated rotating speed, the mixed excitation multiphase synchronous generator 6 cuts off the electrical connection relation with the power grid, the mixed excitation multiphase synchronous generator 6 is used as a generator, the system enters a power generation stage, at the moment, the excitation generator 3 works as an exciter, the current of a rotor winding of the exciter passes through the excitation rectifier 4 and then is led into the rotor excitation winding of the mixed excitation multiphase synchronous generator 6, the mixed excitation multiphase synchronous generator 6 is excited, induced electromotive force is generated in an output power winding on a stator of the mixed excitation multiphase synchronous generator 6, and the current can be provided for a load after the current is connected with the rectifier.
In this embodiment 4, two sets of windings are provided on the stator of the hybrid excitation multiphase synchronous generator 6, and the input motor is eliminated, so that one motor is omitted, and the whole shafting of the generator set is shortened.
The mixed excitation multiphase synchronous generator 6 adopts the electromagnetic structure that the direct current controls the air gap magnetic field and the mixed excitation of the electric excitation and the permanent magnet, and the electric excitation magnetic flux path has no additional air gap, so that the excitation power is small and the system efficiency is high; the invention has simple air gap magnetic field regulation and large regulation range, and enables the system to output wider voltage regulation capability or wide-range variable speed constant voltage output capability.
The invention also provides two specific structures of the rotor of the hybrid excitation multiphase synchronous generator 6: wherein,
a first structure of a rotor of a hybrid excitation multiphase synchronous generator 6 applicable to any one of embodiments 1 to 4 will be further described with reference to fig. 7, in the present preferred embodiment,
the rotor of the hybrid excitation multiphase synchronous generator 6 comprises a rotor iron core 6-1, an excitation winding 6-2 and an excitation permanent magnet 6-3;
the rotor core 6-1 comprises main pole teeth 6-1-1 and a yoke core 6-1-2, and the main pole teeth are uniformly arranged on the outer surface of the yoke core 6-1-2 along the circumferential direction;
each main pole tooth 6-1-1 is wound with an excitation coil, and all the excitation coils are connected in series to form an excitation winding 6-2;
along the circumferential direction, an excitation permanent magnet 6-3 is embedded between two adjacent main pole teeth 6-1-1, and the excitation permanent magnet 6-3 is magnetized tangentially; and along the circumferential direction, the magnetizing directions of two adjacent excitation permanent magnets 6-3 are opposite.
Further, the excitation permanent magnet 6-3 is preferably implemented in such a manner that the excitation permanent magnet 6-3 has a long strip-shaped structure.
In the preferred embodiment, the rotor has no electric brush and slip ring, has simple structure, high strength and high reliability, is suitable for high-speed operation and is convenient to maintain; an additional air gap is not arranged in an electric excitation magnetic flux path, the excitation power is small, and the system efficiency is high; the air gap magnetic field is simple to adjust, large in adjusting range, small in excitation power and wide in voltage adjusting capacity or wide-range variable-speed constant-voltage output capacity.
A second structure of a rotor of a hybrid excitation multiphase synchronous generator 6 applicable to any one of embodiments 1 to 4 will be further described with reference to fig. 8, in the present preferred embodiment,
the rotor of the hybrid excitation multiphase synchronous generator 6 comprises a rotor iron core 6-1, an excitation winding 6-2 and an excitation permanent magnet 6-3;
the rotor core 6-1 comprises main pole teeth 6-1-1 and a yoke core 6-1-2, and the main pole teeth 6-1-1 are uniformly arranged on the outer surface of the yoke core 6-1-2 along the circumferential direction;
n axial holes are formed in the pole shoe of each main pole tooth 6-1-1 along the axial direction, the n axial holes in each main pole tooth 6-1-1 are sequentially arranged along the circumferential direction, and n is a positive integer;
a magnetic bridge is arranged between every two adjacent axial holes, the circumferential width of each magnetic bridge is larger than or equal to 1mm, an excitation permanent magnet 6-3 is embedded in each axial hole, the excitation permanent magnets 6-3 are magnetized in a radial direction or in a parallel direction, the magnetizing directions of the excitation permanent magnets 6-3 on each main pole tooth 6-1-1 are the same, and the magnetizing directions of the excitation permanent magnets 6-3 on the adjacent main pole teeth 6-1-1 are opposite.
Further, the excitation permanent magnet 6-3 is preferably implemented such that the radial section of the axial hole is trapezoidal, fan-shaped, or rectangular.
In the preferred embodiment, the rotor has no electric brush and slip ring, has simple structure, high strength and high reliability, is suitable for high-speed operation and is convenient to maintain; an additional air gap is not arranged in an electric excitation magnetic flux path, the excitation power is small, and the system efficiency is high; the air gap magnetic field is simple to adjust, large in adjusting range, small in excitation power and wide in voltage adjusting capacity or wide-range variable-speed constant-voltage output capacity.
Referring to fig. 3, fig. 4b, fig. 5b, and fig. 6b, a preferred embodiment of the hybrid excitation flywheel pulse synchronous generator system according to one of embodiments 1 to 4 is described, in which the hybrid excitation flywheel pulse synchronous generator system may further include an inertia flywheel, a rotor of the hybrid excitation multiphase synchronous generator 6 is coaxially connected to the inertia flywheel, and the hybrid excitation multiphase synchronous generator 6 is located between the rotor of the excitation generator and the inertia flywheel.
In the preferred embodiment, the inertia flywheel can be omitted when the rotor inertia of all the motors in the hybrid excitation flywheel pulse synchronous generator system is sufficiently large. Therefore, the flywheel and the rotor are combined into a whole, the shaft system of the unit is further shortened, and the power density and the energy density of the motor system are high.
The inertial flywheel of the present invention is only required to be coaxially connected with the whole unit transmission system, but as in the above preferred embodiment, it is most preferred that the hybrid excitation multiphase synchronous generator 6 is located between the excitation generator rotor and the inertial flywheel.
The energy required by the system in the discharge stage is as follows:
W1＝Pt，
wherein, W1The energy required by the system in the power generation stage is P, the system discharge power is P, and t is the system power generation time.
The rotor releases energy W in the power generation stage of the system2Comprises the following steps:
Figure GDA0002988496870000121
wherein J is the rotational inertia of the motor rotor, omegamaxCorresponding angular velocity, omega, at the maximum rotation speed in the power generation stage of the systemminAnd the corresponding angular speed is the minimum rotating speed in the power generation stage of the system.
System rotor moment of inertia JrComprises the following steps:
Figure GDA0002988496870000122
in the formula mrTo the motor rotor mass, D2Is the outer diameter of the rotor.
The flywheel in the system is used for providing energy for the power generation stage of the system by utilizing the kinetic energy stored by the large-inertia rotating flywheel. Since the rotor itself has a moment of inertia, when W2＞W1In the system, the rotational inertia of the motor rotor meets the requirement of the system in the power generation stage, and the flywheel and the rotor can be integrally designed, so that an additional flywheel does not need to be designed.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims (9)

1. The hybrid excitation flywheel pulse synchronous generator system is characterized by comprising an input inverter (1), an input motor/generator (2), an excitation inverter (3), an excitation generator (4), an excitation rectifier (5), a hybrid excitation multiphase synchronous generator (6), an output rectifier (7) and an input rectifier (8);
the input motor/generator (2) is realized by adopting a permanent magnet synchronous motor, and a set of output power windings are wound on a stator of the input motor/generator;
a set of output power windings are arranged on a stator of the hybrid excitation multiphase synchronous generator (6);
the input end of the input inverter (1) is connected with a power grid, the alternating current output end of the input inverter (1) is connected with the power input end of the input motor/generator (2), the outgoing line of the output power winding of the input motor/generator (2) is connected with the input end of the input rectifier (8), and the output end of the input rectifier (8) is connected with the input end of the excitation inverter (3);
the output end of the excitation inverter (3) is connected with a stator winding outgoing line of the excitation generator (4), a rotor winding outgoing line of the excitation generator (4) is connected with an alternating current input end of an excitation rectifier (5), a direct current output end of the excitation rectifier (5) is connected with a rotor excitation winding input end of a mixed excitation multiphase synchronous generator (6), an output power winding output end of the mixed excitation multiphase synchronous generator (6) is connected with an alternating current input end of an output rectifier (7), and direct current output by the output rectifier (7) is used for supplying power to a pulse load;
the rotor of the input motor/generator (2) is coaxially connected with the rotor of the excitation generator (4) and the rotor of the mixed excitation multiphase synchronous generator (6) in sequence;
when the flywheel pulse synchronous generator system is used as a flywheel energy storage system, a power supply end of an input motor/generator (2) is connected to a power grid, firstly, in an electric stage, the input motor/generator (2) is used as a motor, and an excitation generator (4) and a mixed excitation multiphase synchronous generator (6) which are coaxially connected with the input motor/generator are accelerated; when the system rotating speed reaches the rated rotating speed, the input motor/generator (2) cuts off the electrical connection relation with the power grid, the input motor/generator (2) is used as a generator, the system enters a power generation stage, at the moment, the excitation generator (4) works as an exciter, the current of a rotor winding of the exciter passes through an excitation rectifier (5) and then is introduced into a rotor excitation winding of a mixed excitation multiphase synchronous generator (6), the mixed excitation multiphase synchronous generator (6) is excited, induced electromotive force is generated in an output power winding on a stator of the mixed excitation multiphase synchronous generator (6), and the current is provided for a load after being connected with an output rectifier (7).
2. The hybrid excitation flywheel pulse synchronous generator system is characterized by comprising an input inverter (1), an input motor (2), an excitation inverter (3), an excitation generator (4), an excitation rectifier (5), a hybrid excitation multiphase synchronous generator (6), an output rectifier (7) and an inertia flywheel;
a set of output power windings are arranged on a stator of the hybrid excitation multiphase synchronous generator (6);
the input end of the input inverter (1) is connected to a power grid, and the output end of the input inverter (1) is connected with an outgoing line of an output power winding of the input motor (2);
the input end of an excitation inverter (3) is connected with a power grid, the output end of the excitation inverter (3) is connected with a stator winding outgoing line of an excitation generator (4), a rotor winding outgoing line of the excitation generator (4) is connected with an alternating current input end of an excitation rectifier (5), a direct current output end of the excitation rectifier (5) is connected with a rotor excitation winding input end of a mixed excitation multiphase synchronous generator (6), an output power winding output end of the mixed excitation multiphase synchronous generator (6) is connected with an alternating current input end of an output rectifier (7), and direct current output by the output rectifier (7) is used for supplying power to a pulse load;
the rotor of the input motor (2) is sequentially coaxially connected with the rotor of the excitation generator (4) and the rotor of the hybrid excitation multiphase synchronous generator (6);
the flywheel pulse synchronous generator system is used as a flywheel energy storage system, when the flywheel pulse synchronous generator system is applied, the input end of an excitation generator (4) is connected with a power grid, the power grid provides excitation electric energy for the excitation generator (4) to enable the excitation generator (4) to generate an excitation magnetic field, on the other hand, the power grid also provides starting electric energy for the operation of an input motor (2), in the specific working process of the system, the power supply end of the input motor/generator (2) is connected with the power grid, firstly, in the electric stage, the input motor/generator (2) is used as a motor to enable the excitation generator (4) and a mixed excitation multiphase synchronous generator (6) which are coaxially connected with the input motor/; when the rotating speed of the system reaches the rated rotating speed, the input motor/generator (2) cuts off the electrical connection relation with the power grid, the system enters a power generation stage, at the moment, the exciter generator (4) works as an exciter, three-phase current is introduced into a stator winding of the exciter, the exciter generator (4) rotating at high speed cuts an air gap magnetic field, induced electromotive force is generated in a rotor winding of the exciter, induction current is further generated, the excitation current is directly introduced into a rotor excitation winding of the hybrid excitation multiphase synchronous generator through an excitation rectifier (5), excitation of the hybrid excitation multiphase synchronous generator (6) is realized, the induced electromotive force is generated in an output power winding on a stator of the hybrid excitation multiphase synchronous generator (6), and current is provided for a load after the output rectifier (7) is connected.
3. The hybrid excitation flywheel pulse synchronous generator system is characterized by comprising an input inverter (1), an input motor/generator (2), an input rectifier (3), an excitation inverter (4), an excitation generator (5), a hybrid excitation multiphase synchronous generator (6), an excitation rectifier (7) and an output rectifier (8);
a set of output power windings are wound on a stator of the hybrid excitation multiphase synchronous generator (6);
the input motor/generator (2) is realized by adopting a permanent magnet synchronous motor or an induction motor, and two sets of windings, namely an input power winding and an output power winding, are arranged on a stator of the input motor/generator (2);
the input end of the input inverter (1) is connected with a power grid, the output end of the input inverter (1) is connected with an outgoing line of an input power winding of the input motor/generator (2), an outgoing line of an output power winding of the input motor/generator (2) is connected with an alternating current input end of the input rectifier (3), and a direct current output end of the input rectifier (3) is connected with the input end of the excitation inverter (4);
the output end of the excitation inverter (4) is connected with a stator winding outgoing line of the excitation generator (5), a rotor winding outgoing line of the excitation generator (5) is connected with an alternating current input end of an excitation rectifier (7), a direct current output end of the excitation rectifier (7) is connected with a rotor excitation winding input end of the hybrid excitation multiphase synchronous generator (6), an output power winding output end of the hybrid excitation multiphase synchronous generator (6) is connected with an alternating current input end of an output rectifier (8), and direct current output by the output rectifier (8) is used for supplying power to a pulse load;
the rotor of the input motor/generator (2) is coaxially connected with the rotor of the excitation generator (5) and the rotor of the mixed excitation multiphase synchronous generator (6) in sequence;
when the flywheel pulse synchronous generator system is used as a flywheel energy storage system, a power supply end of an input motor/generator (2) is connected to a power grid to provide starting electric energy for the operation of the input motor/generator (2), firstly, in an electric stage, the input motor/generator (2) is used as a motor to accelerate an excitation generator (5) and a mixed excitation multiphase synchronous generator (6) which are coaxially connected with the input motor/generator; when the system rotating speed reaches the rated rotating speed, the input motor/generator (2) cuts off the electrical connection relation with the power grid, the input motor/generator (2) is used as a generator, the input motor/generator (2) is used as a motor to provide electric energy for the excitation generator (5), the system enters a power generation stage, at the moment, the excitation generator (5) works as an exciter, the rotor winding electricity of the exciter flows through the excitation rectifier (4) and then is led into the rotor excitation winding of the hybrid excitation multiphase synchronous generator (6), the excitation of the hybrid excitation multiphase synchronous generator (6) is realized, induced electromotive force is generated in an output power winding on the stator of the hybrid excitation multiphase synchronous generator (6), and the output rectifier (8) is connected to provide current for a load.
4. The hybrid excitation flywheel pulse synchronous generator system is characterized by comprising an input inverter (1), an excitation inverter (2), an excitation generator (3), an excitation rectifier (4), an output rectifier (5), a hybrid excitation multiphase synchronous generator (6) and an inertia flywheel;
the stator of the mixed excitation multiphase synchronous generator (6) is provided with two sets of windings, namely an input power winding and an output power winding;
the input end of the input inverter (1) is connected to a power grid, and the output end of the input inverter (1) is connected with an outgoing line of an input power winding of the hybrid excitation multiphase synchronous generator (6);
the input end of the excitation inverter (2) is connected with a power grid, the output end of the excitation inverter (2) is connected with a stator winding outgoing line of the excitation generator (3), a rotor winding outgoing line of the excitation generator (3) is connected with the alternating current input end of the excitation rectifier (4), and the direct current output end of the excitation rectifier (4) is connected with the rotor excitation winding input end of the hybrid excitation multiphase synchronous generator (6);
an outgoing line of an output power winding of the hybrid excitation multiphase synchronous generator (6) is connected with an alternating current input end of an output rectifier (5), and direct current output by the output rectifier (5) is used for supplying power to a pulse load;
the rotor of the excitation generator (3) is coaxially connected with the rotor of the hybrid excitation multiphase synchronous generator (6);
when the pulse synchronous generator system is used as a flywheel energy storage system, the power supply ends of a mixed excitation multiphase synchronous generator (6) and an excitation generator (3) are both connected to a power grid, firstly, in the electric stage, the input inverter (1) is connected with an input power winding of the mixed excitation multiphase synchronous generator (6), so that the excitation generator (3) coaxially connected with the mixed excitation multiphase synchronous generator (6) is accelerated; when the system rotating speed reaches the rated rotating speed, the mixed excitation multiphase synchronous generator (6) is cut off from the electric connection relation with a power grid, the mixed excitation multiphase synchronous generator (6) is used as a generator, the system enters a power generation stage, at the moment, the excitation generator (3) works as an exciter, the current of a rotor winding of the exciter flows through an excitation rectifier (4) and then is led into a rotor excitation winding of the mixed excitation multiphase synchronous generator (6), the mixed excitation multiphase synchronous generator (6) is excited, induced electromotive force is generated in an output power winding on a stator of the mixed excitation multiphase synchronous generator (6), and the current is provided for a load after the output rectifier (5) is connected.
5. The hybrid excitation flywheel pulse synchronous generator system according to one of claims 1 to 4, wherein the rotor of the hybrid excitation multiphase synchronous generator (6) comprises a rotor core (6-1), an excitation winding (6-2), and an excitation permanent magnet (6-3);
the rotor core (6-1) comprises main pole teeth (6-1-1) and a yoke core (6-1-2), and the main pole teeth are uniformly arranged on the outer surface of the yoke core (6-1-2) along the circumferential direction;
an excitation coil is wound on each main pole tooth (6-1-1), and all the excitation coils are connected in series to form an excitation winding (6-2);
along the circumferential direction, an excitation permanent magnet (6-3) is embedded between two adjacent main pole teeth (6-1-1), and the excitation permanent magnet (6-3) is magnetized tangentially; and along the circumferential direction, the magnetizing directions of two adjacent excitation permanent magnets (6-3) are opposite.
6. The hybrid excitation flywheel pulse synchronous generator system as claimed in claim 5, characterized in that the excitation permanent magnets (6-3) are of elongated configuration.
7. The hybrid excitation flywheel pulse synchronous generator system according to one of claims 1 to 4, wherein the rotor of the hybrid excitation multiphase synchronous generator (6) comprises a rotor core (6-1), an excitation winding (6-2), and an excitation permanent magnet (6-3);
the rotor core (6-1) comprises main pole teeth (6-1-1) and a yoke core (6-1-2), and the main pole teeth (6-1-1) are uniformly arranged on the outer surface of the yoke core (6-1-2) along the circumferential direction;
n axial holes are formed in the pole shoe of each main pole tooth (6-1-1) along the axial direction, the n axial holes in each main pole tooth (6-1-1) are sequentially arranged along the circumferential direction, and n is a positive integer;
a magnetic bridge is arranged between every two adjacent axial holes, the circumferential width of each magnetic bridge is larger than or equal to 1mm, an excitation permanent magnet (6-3) is embedded in each axial hole, the excitation permanent magnets (6-3) are magnetized in a radial direction or in a parallel direction, the magnetization directions of the excitation permanent magnets (6-3) on each main pole tooth (6-1-1) are the same, and the magnetization directions of the excitation permanent magnets (6-3) on the adjacent main pole teeth (6-1-1) are opposite.
8. The hybrid excitation flywheel pulse synchronous generator system of claim 7 wherein the radial cross-section of the axial bore is trapezoidal, scalloped or rectangular.
9. The hybrid excitation flywheel pulse synchronous generator system according to one of claims 1 to 4, further comprising an inertia flywheel, wherein the rotor of the hybrid excitation multiphase synchronous generator (6) is coaxially connected with the inertia flywheel, and the hybrid excitation multiphase synchronous generator (6) is located between the rotor of the excitation generator and the inertia flywheel.
CN201910894408.0A 2019-09-20 2019-09-20 Mixed excitation flywheel pulse synchronous generator system Active CN110601619B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910894408.0A CN110601619B (en) 2019-09-20 2019-09-20 Mixed excitation flywheel pulse synchronous generator system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910894408.0A CN110601619B (en) 2019-09-20 2019-09-20 Mixed excitation flywheel pulse synchronous generator system

Publications (2)

Publication Number Publication Date
CN110601619A CN110601619A (en) 2019-12-20
CN110601619B true CN110601619B (en) 2021-07-06

Family

ID=68861876

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910894408.0A Active CN110601619B (en) 2019-09-20 2019-09-20 Mixed excitation flywheel pulse synchronous generator system

Country Status (1)

Country Link
CN (1) CN110601619B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112532128B (en) * 2020-11-13 2024-08-09 北京曙光航空电气有限责任公司 Aviation high-power composite brushless starting power generation system and control method thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101383548B (en) * 2008-10-13 2010-04-14 哈尔滨工业大学 Multi lateral compensation type high power density electromechanical energy convertor
JP4362545B1 (en) * 2009-03-10 2009-11-11 修 村山 A power generation device for preventing global warming that supplies only the amount of power required for the demand that is generated.
CN102386829B (en) * 2011-08-24 2013-07-24 南京航空航天大学 Starting power generation system for electric automobile
CN104702186B (en) * 2014-11-27 2017-10-31 南京航空航天大学 A kind of composite excitation frequency-changing AC starting-generating system and its control method
CN204425153U (en) * 2015-03-30 2015-06-24 哈尔滨理工大学 A kind of novel alternative expression mixed excitation synchronous generator rotor
CN104728265B (en) * 2015-04-01 2017-03-08 河南理工大学 The guiding control method of composite excitation guidance system
CN105634228B (en) * 2016-01-21 2017-11-14 南京航空航天大学 Five phase dual stator-winding induction generators and its parameter optimization method
CN109713957B (en) * 2018-11-21 2021-04-23 南京航空航天大学 Double-channel alternating current-direct current hybrid power supply starting power generation system

Also Published As

Publication number Publication date
CN110601619A (en) 2019-12-20

Similar Documents

Publication Publication Date Title
CN111900848B (en) Three-winding axial magnetic field multiphase flywheel pulse generator system
Nagorny et al. Design aspects of a high speed permanent magnet synchronous motor/generator for flywheel applications
JP5060546B2 (en) Permanent magnet generator and wind power generator using it
CN110601482B (en) Axial magnetic field flywheel pulse synchronous generator system
CN110460218B (en) Flywheel pulse generator system controlled by stator magnetic circuit
Fei et al. Design and analysis of high-speed coreless axial flux permanent magnet generator with circular magnets and coils
CN110545021B (en) Mixed excitation multi-phase reluctance motor and power generation system
CN110492665B (en) Flywheel pulse synchronous generator system with embedded permanent magnet rotor
CN110635595B (en) Outer rotor flywheel pulse synchronous generator system
CN110504789B (en) Modular flywheel pulse generator system
Jang et al. Comparison of three types of PM brushless machines for an electro-mechanical battery
CN105186749B (en) A kind of ring-shaped yoke portion double winding composite excitation permanent magnet motor
CN111953161B (en) Double-winding axial magnetic field multiphase flywheel pulse generator system
CN110601619B (en) Mixed excitation flywheel pulse synchronous generator system
CN110504810B (en) Parallel magnetic circuit hybrid excitation reluctance motor system
Dobzhanskyi et al. Comparison analysis of PM transverse flux outer rotor machines with and without magnetic shunts
Nukki et al. Exterior-rotor permanent magnet synchronous machine with toroidal windings for unmanned aerial vehicles
CN111224477A (en) Parallel structure brushless mixed excitation synchronous generator based on harmonic winding excitation
CN108418375B (en) Multi-section spoke staggered rotor permanent magnet synchronous motor for electric automobile and method thereof
Sezenoğlu et al. Design of axial flux permanent magnet generator for generator driven electromagnetic launcher
CN110545026A (en) stator excitation flywheel pulse induction generator system
Fei et al. Design and performance analysis of a high-speed air-cored axial-flux permanent-magnet generator with circular magnets and coils
CN111082625A (en) Alternating magnetic pole brushless hybrid excitation synchronous motor
CN117239969B (en) Outer rotor variable magnetic flux alternating pole permanent magnet synchronous motor
CN113489275B (en) Stator partition type alternating current excitation type hybrid excitation brushless motor based on mixed pole rotor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant