Embedded brushless synchronous excitation synchronous generator
By integrating the main generator and excitation generator in the synchronous generator, the rotary diode bridge rectifier and DC-DC converter are used to achieve electrical coupling and excitation, which solves the problems of slow adjustment speed, large maintenance workload and low operating efficiency of the traditional excitation system, and achieves efficient and stable synchronous generator performance.
Patent Information
- Application Number
- CN202421409060.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The excitation system of traditional synchronous generators has problems such as slow regulation speed, large maintenance workload, and low operating efficiency, which is difficult to meet the high requirements of modern power systems for generator performance.
Design an embedded brushless synchronous generator with synchronous excitation. By integrating the main generator and excitation generator in the same frame, the rotary diode bridge rectifier and DC-DC converter are used to achieve electrical coupling and excitation, simplifying the structure, reducing costs and improving efficiency.
It realizes a synchronous generator with a simple structure, small size, low cost, high efficiency and easy to control. It can achieve stable voltage regulation through the excitation winding current control of the excitation synchronous generator. The system has good dynamic response capabilities and high overall efficiency.
Smart Images
Figure CN222839550U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical engineering and rotating motors, and in particular designs a novel built-in brushless synchronous excitation synchronous generator. Background Art
[0002] Synchronous generators are key equipment in power systems, and their excitation systems have an important impact on the operating efficiency and stability of the generators. Traditional excitation systems have problems such as slow adjustment speed, heavy maintenance workload, and low operating efficiency, which makes it difficult to meet the high requirements of modern power systems for generator performance. Therefore, developing an efficient and stable synchronous generator excitation system is of great significance to improving the overall performance of the power system. Summary of the invention
[0003] The utility model aims to provide an embedded brushless synchronous excitation synchronous generator, which reduces the overall size and cost by integrating the main generator and the excitation generator in the same frame, and is expected to improve the efficiency of the entire system.
[0004] To achieve the above objectives, this application provides the following technical solutions:
[0005] A built-in brushless synchronous excitation synchronous generator comprises a main synchronous generator and an excitation synchronous generator, wherein the main synchronous generator and the excitation synchronous generator share a set of frames, wherein the armature winding of the main synchronous generator is arranged on the stator, the excitation winding of the main synchronous generator is arranged on the rotor, the armature winding of the excitation synchronous generator is arranged on the rotor, the excitation winding of the excitation synchronous generator is fixed on the stator, an electrical coupling is established between the main synchronous generator and the excitation synchronous generator via a rotating diode bridge rectifier, a DC-DC converter is connected to the excitation winding of the excitation synchronous generator, and the DC-DC converter rectifies the induced voltage of the excitation winding of the excitation synchronous generator to form the current of the main synchronous generator; the armature winding of the excitation synchronous generator converts the generated alternating current into direct current via the rotating diode bridge rectifier to provide excitation for the main synchronous generator, and the armature winding of the main synchronous generator is connected to a load.
[0006] The armature winding of the excitation synchronous generator is designed as a three-phase structure.
[0007] The number of poles of the main synchronous generator winding is 4, and the number of poles of the excitation synchronous generator winding is 6.
[0008] The number of rotor slots of the synchronous generator and the number of poles of the armature winding of the main synchronous generator satisfy the following relationship: (1)
[0009] Among them, N r is the number of rotor slots, PMM , P EM are the pole numbers of the armature windings of the main synchronous generator and the excitation synchronous generator, respectively, and q EM 、m EM are the number of slots per pole and the number of phases of the armature winding of the excitation synchronous generator respectively, and n is an arbitrary integer.
[0010] The main synchronous generator, the excitation synchronous generator and the rotating diode bridge rectifier are connected to a control system.
[0011] Compared with the prior art, the utility model has the following beneficial effects: simple structure, small size, low cost, high efficiency and easy control; while maintaining high efficiency, it can achieve stable voltage regulation through current control of the excitation winding of the excitation synchronous generator; the system has good dynamic response capability and high overall efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a structural diagram of the synchronous generator of the present utility model.
[0013] Figure 2 This is the winding layout diagram of the main synchronous generator and the excitation synchronous generator of the utility model, where a is the armature winding of the main synchronous generator, b is the excitation winding of the main synchronous generator, c is the armature winding of the excitation synchronous generator, and d is the excitation winding of the excitation synchronous generator. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] See also Figure 1 and Figure 2 , the utility model provides a technical solution:
[0016] like Figure 1The embedded brushless synchronous excitation synchronous generator shown includes a main synchronous generator 2 and an excitation synchronous generator 1. The main synchronous generator 2 and the excitation synchronous generator 1 share a set of frames. The armature winding 10 of the main synchronous generator 2 is arranged on the stator, the excitation winding 9 of the main synchronous generator 2 is arranged on the rotor 4, the armature winding 7 of the excitation synchronous generator 1 is arranged on the rotor, and the excitation winding 8 of the excitation synchronous generator 1 is fixed on the stator. The main synchronous generator 2 and the excitation synchronous generator 1 are electrically coupled through a rotating diode bridge rectifier 3. The excitation winding 8 of the excitation synchronous generator 1 is connected to a DC-DC converter 5. The DC-DC converter 5 rectifies the induced voltage of the excitation winding 8 of the excitation synchronous generator 1 to form the current of the main synchronous generator 2; the armature winding 10 of the excitation synchronous generator 1 converts the generated alternating current into direct current through the rotating diode bridge rectifier 3 to provide excitation for the main synchronous generator 2, and the armature winding of the main synchronous generator 2 is connected to a load 6.
[0017] An embedded brushless synchronous excitation synchronous generator of the present application also includes a control system, which maintains stable operation and efficient excitation of the main synchronous generator by detecting and adjusting the excitation currents If(EM) and If(MM), and the related induced electromotive forces Ef(EM) and Ef(MM) according to a preset control strategy.
[0018] Preferably, the number of poles of the main synchronous generator winding is 4, and the number of poles of the excitation synchronous generator winding is 6.
[0019] Preferably, in order to make the number of slots of the main synchronous generator excitation winding and the excitation synchronous generator excitation winding both integers, the following relationship needs to be satisfied: (1)
[0020] Among them, N r is the number of rotor slots, P MM , P EM are the pole numbers of MM and EM armatures, q EM 、m EM are the number of slots per pole and the number of phases of the EM armature respectively, and n is an arbitrary integer.
[0021] Preferably, the excitation electromotive force is generated by an excitation generator and supplied to the main synchronous generator after rectification, and the dynamic response and steady-state performance of the power generation system are ensured by adjusting the excitation current in real time.
[0022] Figure 2The detailed winding layout of the main synchronous generator and the excitation synchronous generator of the utility model is shown. The utility model has the following advantages: simple structure, small size, low cost, high efficiency and easy control; while maintaining high efficiency, it can achieve stable voltage regulation through EM side field current control; the system has good dynamic response capability and high overall efficiency.
[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An embedded brushless synchronous excitation synchronous generator, characterized in that: The invention comprises a main synchronous generator and an excitation synchronous generator, wherein the main synchronous generator and the excitation synchronous generator share a set of frames, the armature winding of the main synchronous generator is arranged on the stator, the excitation winding of the main synchronous generator is arranged on the rotor, the armature winding of the excitation synchronous generator is arranged on the rotor, the excitation winding of the excitation synchronous generator is fixed on the stator, an electrical coupling is established between the main synchronous generator and the excitation synchronous generator through a rotating diode bridge rectifier, the excitation winding of the excitation synchronous generator is connected to a DC-DC converter, the DC-DC converter rectifies the induced voltage of the excitation winding of the excitation synchronous generator to form the current of the main synchronous generator; the armature winding of the excitation synchronous generator converts the generated alternating current into direct current through the rotating diode bridge rectifier to provide excitation for the main synchronous generator, and the armature winding of the main synchronous generator is connected to a load.
2. The embedded brushless synchronous excitation synchronous generator according to claim 1, characterized in that: The armature winding of the excitation synchronous generator is designed as a three-phase structure.
3. The embedded brushless synchronous excitation synchronous generator according to claim 1, characterized in that: The number of poles of the main synchronous generator winding is 4, and the number of poles of the excitation synchronous generator winding is 6.
4. The embedded brushless synchronous excitation synchronous generator according to claim 1, characterized in that: The number of rotor slots of the synchronous generator and the number of poles of the armature winding of the main synchronous generator satisfy the following relationship: （1） Among them, N r is the number of rotor slots, P MM , P EM are the pole numbers of the armature windings of the main synchronous generator and the excitation synchronous generator, respectively, and q EM 、m EM are the number of slots per pole and the number of phases of the armature winding of the excitation synchronous generator respectively, and n is an arbitrary integer.
5. The embedded brushless synchronous excitation synchronous generator according to claim 1, characterized in that: The main synchronous generator, the excitation synchronous generator and the rotating diode bridge rectifier are connected to a control system.