A brushless variable speed constant frequency two-stage doubly-fed generator
A double-fed generator, variable-speed constant-frequency technology, applied in electrical components, electromechanical devices, etc., can solve the problems of short life and poor reliability, and achieve the effects of long life, high reliability and simple control
Inactive Publication Date: 2016-05-11
王自强 +2
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to overcome the above-mentioned problems of poor reliability and short service life caused by the rotor collector ring and brushes of the existing doubly-fed generator, the present invention designs a brushless variable-speed constant-frequency two-stage doubly-fed generator
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] The present invention will be further described in conjunction with the accompanying drawings.
[0032] exist figure 1 Among them, the generator adopts a horizontal casing 5, and the AC excitation stage stator 4 and the main power generation stage stator 7 are fixed in series in the horizontal casing 5, and the magnetic fields generated by the two-stage stator currents are in the respective stator cores and the stator and rotor gas. A closed loop is formed in the gap without passing through the horizontal casing 5, so the magnetic circuits of the two-stage generators are isolated from each other and the circuits are separated. The AC excitation stage rotor 3 and the main generator stage rotor 6 are connected in series on the rotor shaft 10 and rotate at the same speed. The AC excitation stage stator 4 and the AC excitation stage rotor 3 constitute the AC excitation stage, which is placed on the left side of the rotor shaft 10 axially. on the right side. The front end...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a brushless variable-speed constant-frequency two-stage double-fed generator which is a novel brushless generator capable of realizing variable-speed constant-frequency electricity generation. The brushless variable-speed constant-frequency two-stage double-fed generator is provided with a front-stage (alternating current excitation stage) stator and rotor system and a rear-stage (primary electricity generation stage) stator and rotor system, wherein a front-stage stator is connected with a power grid by virtue of a reversible converter, a rear-stage stator is directly connected with the power grid, rotors of two stages are coaxial, and three phases of windings are directly connected. When a prime mover drags the rotors to rotate, the front-stage stator performs excitation, the rotors generate electricity, and the generated electricity energy is directly used as the excitation electrical energy of the rear-stage rotor, so that the rear-stage stator generates electricity. According to the double-fed theory, when the rotation speed of the generator changes, the output current frequency of the generator is kept constant by virtue of keeping the excitation frequency of the front-stage stator constant, so that the generator can realize variable-speed constant-frequency electricity generation on the premise of not using a collector ring brush.
Description
technical field [0001] The invention is a brushless alternator suitable for variable-speed and constant-frequency occasions. The generator avoids collector rings and brushes, and is suitable for the fields of aviation power generation, aerospace power generation, wind power generation, hydropower generation and the like. Background technique [0002] Variable-speed constant-frequency generators are more common in wind power generation, and double-fed variable-speed constant-frequency wind turbines are currently the mainstream models of wind turbines at home and abroad. The doubly-fed generator has two windings, the stator and the rotor. The stator winding is used for power generation and is directly connected to the power grid. The rotor winding is AC excited by the reversible converter connected to the power grid. Doubly-fed generators generally operate asynchronously, and the rotating magnetic field generated by the stator and rotor currents in the asynchronous generator i...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02K16/00
Inventor 王自强何梦宇江亮亮鞠来财徐优
Owner 王自强