CN114793028A - Secondary winding in form of fundamental wave and third harmonic wave - Google Patents
Secondary winding in form of fundamental wave and third harmonic wave Download PDFInfo
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- CN114793028A CN114793028A CN202110114621.2A CN202110114621A CN114793028A CN 114793028 A CN114793028 A CN 114793028A CN 202110114621 A CN202110114621 A CN 202110114621A CN 114793028 A CN114793028 A CN 114793028A
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- phase
- winding
- secondary winding
- generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- 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
- H02P9/36—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using armature-reaction-excited machines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention belongs to the technical field of generators, and relates to a three-phase secondary winding in a fundamental wave plus third harmonic wave form, which is characterized in that the secondary winding is a three-phase winding and is arranged in a stator core of a generator together with a main winding, the three-phase secondary winding is connected in a triangular manner and is provided with openings at two ends, zero sequence current is generated at the two opening ends, the zero sequence current and fundamental wave current generated by a phase winding are supplied to a voltage regulator together, and the zero sequence current and the fundamental wave current are supplied to a generator rotor as an excitation source after being rectified by the voltage regulator. After the auxiliary winding in the form is applied, the output voltage of the generator is stable, the inductive load capacity of the generator for starting motors such as a water pump, a fan, a compressor and the like is greatly improved, and the load in the form of 1:1 starting can be realized.
Description
Technical Field
The invention belongs to the technical field of generators, and relates to a fundamental wave and third harmonic wave form three-phase secondary winding.
Background
The excitation mode of the conventional generator is mostly self-excitation and fundamental wave secondary winding excitation, as shown in fig. 1 and 2.
In the mode of fig. 1, the excitation source is taken from the output terminal U, V, W and then provided to the voltage regulator; in the mode of fig. 2, a set of fundamental secondary windings arranged in the generator core provide the excitation source to the voltage regulator, however, both excitation modes have significant disadvantages: when the load is inductive load of motors such as a water pump, a fan, a compressor and the like, the transient performance of the generator is poor, and the configuration capacity of the generator needs to be increased when the load is started, and the configuration capacity is generally (2.5-3): 1.
Disclosure of Invention
Aiming at the problems, the invention provides a fundamental wave and third harmonic wave form three-phase secondary winding excitation mode which has stable steady output voltage and good transient performance and can start the motor loads such as a water pump, a fan, a compressor and the like in a ratio of 1: 1.
The technical scheme of the invention is as follows:
a three-phase secondary winding in the form of fundamental wave and third harmonic wave is characterized in that: the secondary winding is a three-phase winding and is arranged in a stator iron core of the generator together with the main winding, the secondary winding is provided with two openings, the two openings generate zero sequence current, the zero sequence current and fundamental current generated by the phase winding are supplied to the voltage regulator together, and the zero sequence current and the fundamental current are supplied to a rotor of the generator as an excitation source after being rectified by the voltage regulator.
Furthermore, the secondary winding is a three-phase winding, each phase has an electrical angle difference of 120 degrees, and the secondary winding and the main winding are arranged in a core slot of the stator of the generator together.
Further, the secondary winding is a distributed winding.
Furthermore, the secondary winding is connected in a triangular mode and is provided with two open ends.
The three-phase windings are distributed windings which are completely and symmetrically distributed, the three phases mutually differ by 120 degrees of electrical angle, each phase is provided with 2 coil groups, each coil group is connected in a triangular mode, and two ends of each coil group are provided with openings. The invention has the technical effects that: the generator has stable output voltage, good transient performance and strong starting performance, and can start the loads of motors such as a water pump, a fan, a compressor and the like in a ratio of 1: 1.
Drawings
Fig. 1 is an electrical schematic diagram of the conventional self-excited excitation.
Fig. 2 is an electrical schematic diagram of conventional fundamental secondary winding excitation.
Fig. 3 is a schematic diagram of the electrical principle of the present invention.
Fig. 4 is a schematic diagram of the distribution of windings in the stator core.
Detailed Description
The invention is further illustrated by the following specific figures and examples.
Example 1 the invention is described in detail using a 48 slot, 4 pole generator as an exampleTo illustrate, as shown in fig. 4, a three-phase main winding and a three-phase fundamental wave + third harmonic wave auxiliary winding proposed by the present invention are embedded in a stator core slot, the auxiliary winding and the main winding are independent from each other, 6 coils are arranged in each phase and divided into 2 groups, each group is formed by connecting 3 concentric coils in series, a first group of a phase is formed by connecting three concentric coils 1-8, 2-7, 3-6 in series, a second group is formed by connecting three concentric coils 25-32, 26-31, 27-30 in series, the two groups are connected in series, lead-out wires are led out from a 6 th slot and a 27 th slot, which are respectively marked as H 1 、H 2 (ii) a The first group of the phase B is formed by connecting three concentric coils 9-16, 10-15 and 11-14 in series, the second group is formed by connecting three concentric coils 33-40, 34-39 and 35-38 in series, the two groups are connected in series, and outgoing lines are led out from the 14 th groove and the 35 th groove and are respectively marked as H 1 、H 4 (ii) a The first group of the phase C is formed by connecting three concentric coils 17-24, 18-23 and 19-22 in series, the second group is formed by connecting three concentric coils 41-48, 42-47 and 43-46 in series, the two groups are connected in series, and outgoing lines are led out from the 22 nd groove and the 43 th groove and are respectively marked as H 3 、H 4 ；H 1 、H 2 、H 3 、H 4 The three-phase windings A, B, C are symmetrically arranged and have an electric angle of 120 deg. difference.
The three-phase winding is distributed winding, and is completely symmetrically distributed, the three phases mutually differ by 120 degrees of electric angle, each phase is provided with 2 coil groups, and the three-phase winding is connected in a triangular manner and is provided with openings at two ends. The invention has the technical effects that: the generator has stable output voltage, good transient performance and strong starting performance, and can start the loads of motors such as a water pump, a fan, a compressor and the like in a ratio of 1: 1.
The present invention and its embodiments have been described above, and the description is not intended to limit, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A three-phase secondary winding in the form of fundamental waves and third harmonic waves is characterized in that: the secondary winding is a three-phase winding and is arranged in a stator iron core of the generator together with the main winding, the secondary winding is provided with two openings at two ends, the two openings generate zero sequence current, the zero sequence current and fundamental wave current generated by the phase winding are supplied to the voltage regulator together, and the zero sequence current and the fundamental wave current are supplied to a generator rotor as an excitation source after being rectified by the voltage regulator.
2. A three-phase secondary winding of fundamental + third harmonic form as claimed in claim 1, wherein: the secondary winding is a three-phase winding, 2 coil groups are arranged on each phase, the phase difference between each phase is 120 degrees, and the secondary winding and the main winding are arranged in a stator core slot of the generator together.
3. A three-phase secondary winding of fundamental + third harmonic form as claimed in claim 1, wherein: the secondary winding is a distributed winding.
4. A three-phase secondary winding of fundamental + third harmonic form as claimed in claim 1, wherein: the secondary winding is connected in a triangular mode and is provided with openings at two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110114621.2A CN114793028A (en) | 2021-01-26 | 2021-01-26 | Secondary winding in form of fundamental wave and third harmonic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110114621.2A CN114793028A (en) | 2021-01-26 | 2021-01-26 | Secondary winding in form of fundamental wave and third harmonic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114793028A true CN114793028A (en) | 2022-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110114621.2A Pending CN114793028A (en) | 2021-01-26 | 2021-01-26 | Secondary winding in form of fundamental wave and third harmonic wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114793028A (en) |
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2021
- 2021-01-26 CN CN202110114621.2A patent/CN114793028A/en active Pending
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