Salient pole parallel type generator

Abstract

According to the salient pole parallel type generator, pole shoes of every two salient poles of the generator are combined together to form a parallel salient pole pair, so that the pair of salient poles is like an iron core loop of a transformer, and coils of the pair of salient poles are like transformer coils of which main coils and secondary coils are completely equal and are connected. Therefore, when the pair of salient pole coils simultaneously induce magnetic flux to generate power, the magnetic flux of induced current passes through the magnetic loop without generating secondary resistance.

Description

Technical Field

[0001] The invention relates to a salient pole parallel generator, belonging to the technical field of power generation which can greatly reduce resistance, consumption and improve efficiency in new energy power generation technology. Background Art

[0002] At present, in almost all types of generators, the magnetic flux generated by the induced current must pass through the "air gap" between the stator and the rotor, and then either enter the iron core and return to the other pole, or pass through a long air magnetic circuit and then enter the iron core and return to the other pole to complete the magnetic circuit cycle. As a result, a large resistance is generated at the air gap due to the encounter between the original magnetic flux and the magnetic flux of the induced current, making it difficult to significantly improve efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the magnetic flux generated by the induced current in the existing generator must pass through the air gap between the stator and the rotor, and then some enter the other iron core from the air gap and return to the other pole to complete the magnetic circuit cycle, and some enter the iron core from the air gap through a longer air magnetic circuit to complete the magnetic circuit cycle. They will all generate great resistance at the air gap, making it difficult to significantly improve efficiency.

[0004] The technical solution provided by the present invention is: every two salient poles are regarded as a salient pole pair, the pole shoes of the two salient poles are combined together to form a magnetic circuit, and the pair of salient poles are regarded as one salient pole, but the two coils with the same number of turns and the same winding direction in the salient pole pair constitute a constant voltage transformer in which the primary and secondary coils are connected, so that the magnetic flux generated by the induced current of the coil can pass through the magnetic circuit of the salient pole pair and no longer pass through the air gap, that is, no resistance is generated, thereby greatly improving the efficiency of the generator.

[0005] For example, Figure 1 , the two salient poles 2 in each salient pole pair 1 share the same long pole shoe 3, which are connected in parallel to form a closed iron core magnetic circuit; the two coils 5 in each salient pole pair 1 have the same number of turns and the same winding direction, forming a transformer with primary and secondary coils connected and no voltage change; when the rotor magnet 6 rotates, that is, when the magnetic flux in the salient pole pair changes, the two coils in each salient pole pair simultaneously generate induced current; since the magnetic flux or magnetic field intensity of the magnet is almost constant along the circumferential direction, and the speed is uniform motion, the magnetic flux in each salient pole pair changes linearly, that is, the induced electromotive force and induced current are similar to square waves, that is, there is only a square wave with instantaneous disturbance at the moment of switching the magnetic pole direction; then the square wave current can only generate square wave magnetic flux, and in each half cycle, the two coils in each salient pole pair cannot be affected by the induced current of the other party. This principle is the same as the principle that the magnetic flux of the induced current of the two salient pole coils in the double salient pole generator flows through each other without affecting each other (the only difference is whether there is an air gap).

[0006] The output voltage of this example is single-phase square wave AC, but the application range of square wave is too narrow. The voltage output line can be connected to the rectifier and filter elements to use DC, or the DC can be inverted into sinusoidal AC for use as AC power.

[0007] The coil winding method is relatively simple. You can wind each coil separately on the skeleton, and then put it on the staggered salient poles, and then connect the coils or coil pairs end to end, leaving the output line. You can also make a salient pole model first, put the entire skeleton into the salient pole model, wind the coils in turn, and then take out the model and put it into the iron core salient poles in turn; then press it into the pole shoes in an staggered manner, and then fix it (weld or glue).

[0008] Compared with the same type of generator with the same number of salient poles (instead of the number of salient pole pairs) without using salient pole pairs, with the same number of rotor poles and salient poles, the same capacity and the same speed (for example, a generator with 12 salient pole pairs and 12 rotor magnets compared with a generator with 24 salient poles and 24 rotor magnets), the wire diameter of the coil is almost unchanged (the precise wire diameter needs to be designed according to the precise power generation capacity), but the width of the salient pole is increased by about 1 / 3. At the same time, the influence of the increased magnetic resistance caused by the thickening of the pole shoes and the increase in the length of the salient poles (generally the length of the salient poles will be slightly longer) and the staggered superposition connection and splicing of the iron core should be considered. Either slightly increase the magnet strength or slightly reduce the design capacity of the generator, and the actual test results shall prevail. The design of the remaining technical solutions is consistent with the existing technology.

[0009] If you want to directly generate sinusoidal alternating current, whether single-phase or three-phase, in each salient pole pair, the induced current of the two coils will cause each other to produce a larger induced current, and the magnetic flux that causes the other party to produce induced current will also occupy the magnetic circuit, so you need to design a larger wire diameter and a wider salient pole, making the stator core larger in size.

[0010] The coil winding method of three-phase sinusoidal AC can only use the salient pole winding method and cannot use the slot winding method. Figure 2 The stator core has 12 salient pole pairs, and 4-pole rotor poles are usually used. The skeletons on the 4 salient pole pairs can be wound as one phase (4 pairs of coils are connected into one phase, and they have the same phase).

[0011] Although the huge size of the core of this three-phase sinusoidal AC power will occupy more core material and require a larger rotor magnet strength or a larger excitation current, the inventor still reserves the protection scope of the claims.

[0012] The salient pole pairs of the generator are placed on the stator in this example, but may also be placed on the rotor in some cases. Beneficial Effects

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. The stator volume does not increase much (the salient pole width and the pole shoe thickness only increase slightly), but the efficiency is greatly improved, which is equivalent to exchanging a lot of benefits for less sacrifice, which is very worthwhile. 2. The present invention organically combines the principle of magnetic flux generation of electricity of the generator with the principle of mutual inductance (or mutual induction) of the coil of the transformer, which greatly reduces the energy input in the power generation process. 3. The magnetic flux of the induced current does not go through the air gap. For permanent magnet generators, the reverse impact on the permanent magnet is eliminated, and the life of the permanent magnet is extended; for excitation generators, the reverse effect on the excitation coil is eliminated, and the loss of the excitation current is greatly reduced. 4. The magnetic flux of the induced current does not go through the air gap, that is, no resistance is generated (this resistance in traditional generators increases vibration), so the rotation and operation are stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a salient pole parallel stator core with a skeleton coil. 1 is a salient pole pair, 2 is a salient pole, 3 is a pole shoe, 4 is a skeleton, 5 is a coil, 6 is a rotor magnet, 7 is a rotor yoke, 8 is a shaft, 9 is a voltage output line, and 10 is an air gap.

[0015] Figure 2 Schematic diagram of the overall shape of the stator core without the skeleton coil.

[0016] Figure 3 Schematic diagram of a single-layer silicon steel sheet that has been trimmed, cut or punched, but the pole shoes and part of the salient poles have not been trimmed off. 1 is the first trimming line, and 2 is the second trimming line.

[0017] Figure 4 The silicon steel sheet is cut according to the first cutting line.

[0018] Figure 5 The silicon steel sheets are cut according to the second cutting line. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The stator core is composed of staggered laminations and coil windings pre-wound on a frame. For the frame coil pair, it is sufficient to ensure that the two coils in the coil pair have the same winding direction and the same number of turns, and the relationship between the coil pairs depends on the type of generator, which will not be described in detail. Therefore, this embodiment mainly focuses on the production of the laminated core.

[0021] The stator core is Figure 3 The silicon steel sheets shown are stacked Figure 2 shape, but the skeleton coil needs to be put into the salient pole, so the salient pole needs to be cut off, but the magnetic resistance cannot change too much. Figure 3 The silicon steel sheets are cut into the following shapes according to the first cutting line: Figure 4 shape, and cut it into the following shape according to the second cutting line: Figure 5 shape.

[0022] Then Figure 4 The shape of the ring yoke plus salient pole and Figure 5 The shaped annular magnetic yoke and salient poles are stacked alternately to the designed height, and all the wound skeleton coils are inserted into the salient poles. Figure 4 Shaped pole shoes plus salient poles and Figure 5 The pole shoes of different shapes are inserted alternately, and the insertion position is adjusted with a cylindrical mold of the outer diameter of the air gap, and then fixed.

[0023] If the fixing treatment is by welding, some of the welds can be at the outer end of the second cutting line, and the other welds can be located at the appropriate position. If the fixing treatment is by epoxy resin, it needs to be applied in advance when stacking and inserting.

[0024] The two salient poles in each of the above salient pole pairs are parallel to each other, and are parallel to the line connecting the center point of the salient pole pair and the center of the circular magnetic yoke.

[0025] The present invention mainly introduces a generator with a linear magnetic field and outputs a square wave voltage, but the invention reserves the right to adopt a sinusoidal magnetic field or output a sinusoidal wave voltage.

[0026] The parts not involved in the present invention are all related to the prior art or are implemented by using the prior art.

Claims

1. A salient pole parallel generator, characterized in that: The structure of the generator stator core is to merge the pole shoes of every two salient poles together to form a parallel salient pole pair structure; the two coils of this salient pole pair are respectively wound on two frames, and the frames are inserted into the salient poles, and their number of turns and winding direction are the same; this structure is also applicable to the salient pole pair structure in which the generating coil is located on the rotor.

2. According to the salient pole parallel generator described in claim 1, the two salient poles on each salient pole pair are parallel to each other and are parallel to the line connecting the center point of the salient pole pair and the center of the stator core annular yoke.

3. The salient pole parallel generator according to claim 1, characterized in that: The generating coil is wound on a coil frame, which is sleeved on the salient pole. The two coils on the same salient pole pair have the same winding direction and number of turns. One end of the coil frame is tightly attached to the inner side of the stator's circular magnetic yoke, and a small margin is left between the other end and the pole shoe.

4. The salient pole parallel generator according to claim 1, characterized in that: On the circular magnetic yoke, the two salient poles and their pole shoes on each salient pole pair are not a seamless one-piece structure, but are cut and then spliced. The cutting positions are respectively located at the first cutting line and the second cutting line. They are spliced ​​along the first cutting line and the second cutting line. They are spliced ​​with the silicon steel sheets cut along the second cutting line, and then stacked on top of each other to form an iron core.

5. The salient pole parallel generator according to claim 1, characterized in that: For single-phase square wave alternating current, the number of poles (number) of the rotor magnet is equal to the number of salient pole pairs, both are even numbers, and the polarities are staggered.

6. The salient pole parallel generator according to claim 1, characterized in that: The iron core structure of sinusoidal alternating current is relatively large.

7. The salient pole parallel generator according to claim 1, characterized in that: For the structure that uses welding to fix the iron core, a part of the welds are located at the outer end of the second cutting line, and the remaining welds are located at appropriate positions by themselves; for the structure that uses epoxy resin gluing to fix the iron core, there is an appropriate amount of resin between the laminated silicon steel sheets, so that the layers are closely connected.

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