JPH0419961Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a generator having a DC output, in particular, an armature winding for forming the DC output so that the electromagnetic force acting on the rotor at the time of the DC output is equalized. This invention relates to a generator designed to provide

(Background of the invention and problems) Conventionally, in generators that have the function of rectifying the generated AC voltage and converting it to DC and outputting DC voltage, a center tap is provided, and a center tap is provided on each side of each armature winding piece. Many are center-tap type, with a rectifying element installed at the top. In many cases, the armature winding pieces are arranged symmetrically with respect to a line passing through the center line of the stator, and each armature winding piece is wound left and right with respect to the center line. Because this type of winding is used, when load current is flowing through one armature winding piece, the flow of load current is blocked by the rectifying element in the other armature winding piece, and the load current is reduced. It has become so that it does not flow. Therefore, the electromagnetic force (including armature reaction) acting on the rotor is unevenly generated every half cycle. Therefore, an unbalanced force due to magnetic imbalance acts on the rotor, causing magnetic vibration noise and rotor center runout.

A more detailed explanation is as follows. That is, Figures 3A and 3B are explanatory diagrams of a conventional engine-driven generator, Figure 4 is an equivalent circuit diagram of Figure 3A, and Figure 5 is an illustration of a conventional engine-driven generator.
The figure shows a conventional winding diagram, and FIG. 6 shows an explanatory diagram of current flowing through a conventional armature winding piece.

In FIG. 3, a rotor 2 rotates inside a stator 1, creating a rotating magnetic field. Thick line Z
indicates an axis of symmetry, and armature winding piece A and armature winding piece B are inserted symmetrically into slots 5 provided in stator 1, as shown in the winding diagram shown in FIG. As clearly shown in FIG. 3B, the armature winding piece A and the armature winding piece B are present in the armature winding 6 on the stator 1 shown. Further, when the rotor 2 does not constitute a permanent magnet field as shown in FIG. 3A, a rotor winding 7 is wound around the rotor 2 as shown in FIG. 3B. In addition, in FIG. 3B, 8 represents the generator rotating shaft, and 9 represents the engine side frame. In the illustrated configuration, the rotor 2 is cantilevered by the bearing 10 provided in the engine side frame 9. It is in a state of support. One end of the armature winding piece A and the armature winding piece B are connected and taken out as a center tap terminal C, and are connected to the other terminals X and Y of the armature winding piece A and armature winding piece B, respectively. is connected to diodes 3 and 4. The cathodes of these diodes 3 and 4 are connected to each other and serve as a positive terminal U for direct current output. It goes without saying that the center tap terminal C serves as a negative terminal V for direct current output.

FIG. 4 is an equivalent circuit of FIG. 3A, and the symbols in the figure correspond to those in FIG. 3A. and the fifth
The figure is a conventional winding diagram, and shows a specific example of winding when the stator 1 is provided with 36 slots 5. As is clear from FIG. 5, armature winding pieces A are inserted into slots numbered 1 to 18,
Armature winding pieces B are inserted into slots numbered 19 to 36. For single-phase generators, for economic reasons, slots numbered 7 to 12 and numbered 25 to 30 are generally not winded.
The winding method is as follows. i.e. number 1
The conductor inserted into the slot No. 18 is inserted into the slot No. 18 located 180 degrees apart in electrical angle,
It is inserted again into the original slot number 1. After inserting the predetermined number of conductors into the slots corresponding to numbers 1 and 18, insert the number 2 from the number 1 slot.
The winding position is moved to the slot numbered 2 and 17, and the winding is performed between slots corresponding to numbers 2 and 17, and a predetermined number of conductors are inserted into each slot. Similarly, slots corresponding to numbers 3 and 16, slots corresponding to numbers 4 and 15, slots corresponding to numbers 5 and 14, slots corresponding to numbers 6 and 1, etc.
3 and the corresponding slots, respectively, and a predetermined number of conductors are inserted into each slot. In this manner, the windings of the armature winding piece A are wound. The armature winding piece B is also wound in the same manner as the armature winding piece A described above. The terminal end of the winding inserted into slot No. 13 of armature winding piece A is connected to the starting end of the winding inserted into slot No. 36 of armature winding piece B, and a center tap terminal C is connected. The starting and ending ends of armature winding pieces A and B inserted into slots numbered 1 and 24 become terminals X and Y, respectively. Diodes 3 and 4 are connected to these terminals X and Y, respectively. the diode 3,
The cathode sides of 4 are connected to each other to form a positive terminal U for direct current output. The center tap terminal C becomes a negative terminal V for direct current output.

Now, the conductor piece of armature winding piece A inserted into each slot numbered 1 to 6 is A ₁ , and the conductor piece A ₂ of armature winding piece A inserted into each slot numbered 13 to 18 , B ₁ is the conductor piece of armature winding piece B inserted into each slot numbered 19 to 24, and B ₂ is a conductor piece of armature winding piece B inserted into each slot numbered 31 to 36. shall be.
Conductor piece A ₁ wound around the chain winding of armature winding piece A and its corresponding conductor piece A ₂ are each inserted into corresponding slots within 180 degrees in electrical angle. Conductor piece B ₁ wound in a chain winding and its corresponding conductor piece B ₂
As explained in the winding method, the wires are inserted into corresponding slots within 180 degrees in electrical angle.

In FIGS. 3 to 5, when the rotor 2 rotates, the armature winding pieces A and B wound around the stator 1 are in a form that cuts the rotating magnetic field, and each armature winding piece A , B, an equal induced electromotive force is generated. When a load is connected to the DC output terminals U, V, the diodes 3, 4 cause the load current to alternately flow through the armature winding pieces A or B every half cycle. For example, when the flow of the load current is blocked by the diode 3, no electromagnetic force is generated by the armature winding piece A, but an electromagnetic force is generated by the armature winding piece B through which the load current flows.

Assuming that an induced electromotive force is generated in the direction of the arrow shown in FIG. 5, currents as shown in FIG. 6 flow through the armature winding pieces A and B. That is, the conductor pieces A ₁ inserted into each slot numbered 1 to 6.
A load current flows through the diode 3 to the conductor pieces A ₂ inserted into the slots numbered 13 to 18, but the load current flows through the conductor pieces B ₁ inserted into the slots numbered 19 to 24 and the conductor pieces A 2 inserted into the slots numbered 13 to 18. Although a voltage is induced in the conductor pieces _B2 inserted into the respective slots of 36 in the direction of the arrow shown in FIG. 5, the diode 4 blocks the flow of load current. Conversely, when the induced electromotive force is generated in the direction opposite to the arrow shown in Figure 5, the conductor
Load current flows through B ₁ and B ₂ via diode 4, but the flow of load current is blocked by diode 3 between conductor pieces A ₁ and A ₂ . Since conventional armature windings are wound on the left and right sides of the axis of symmetry Z, electromagnetic force is generated unevenly, and an unbalanced force due to magnetic imbalance acts on the rotor 2, especially in the third
A generator with a cantilever support configuration as shown in Figure B,
For example, in a motor generator driven by an engine, vibrations caused by the engine's torque pulsations compound with this magnetic imbalance, putting an excessive load on the rotor's bearings, and increasing the rotor's center runout. Problems sometimes occurred.

(Purpose and structure of the invention) The purpose of the invention is to solve the above-mentioned problems.The invention uses an armature winding that allows the electromagnetic force generated during DC output to act evenly, thereby preventing the occurrence of magnetic imbalance. The purpose is to provide a generator that prevents Therefore, in the generator of the present invention, a center tap is formed, and a rectifying element is provided on each side of each armature winding piece to form a DC output part. The two conductor pieces of the individual loops constituting the plurality of loops with respect to the one armature winding piece configured are located in the armature slot at a position belonging to the first group and at a position belonging to the second group. The slot is inserted into the slot to form the loop, and the positions belonging to the first group are given in the range from the slot position corresponding to the angle 0° to the slot position corresponding to the angle θ°, and the position belonging to the first group is given in the range from the slot position corresponding to the angle θ° The position belonging to the second group is given in the range from the slot position corresponding to an angle of 180° to the slot position corresponding to an angle of 180° + θ°, and further, the other one is constituted by a plurality of loops. With respect to the armature winding pieces, two conductor pieces of individual loops constituting the plurality of loops are inserted into the armature slots in positions belonging to the third group and in positions belonging to the fourth group. to form the loop, the positions belonging to the third group are given in the range from the slot position corresponding to the angle 180° - θ° to the slot position corresponding to the angle 180°, and the position belonging to the third group The positions belonging to group 4 are given in the range from the slot position corresponding to the angle 360° - θ° to the slot position corresponding to the angle 360°, and the electromagnetic force generated by each armature winding piece is is characterized in that it acts evenly on the rotating shaft of the generator rotor. This will be explained below with reference to the drawings.

(Example of the invention) Fig. 1 shows an example winding diagram of the armature winding of a generator according to the invention, and Fig. 2 shows an explanatory diagram of the current flowing through the armature winding pieces of the invention. .

The armature winding according to the present invention is wound as follows. In other words, the conductor inserted into the slot numbered 1 in Figure 1 is inserted into the corresponding slot numbered 24, which is located 180 degrees or more away in electrical angle, and then the conductor is inserted into the original slot numbered 1 again. be done. In this way, winding is carried out between the slots corresponding to numbers 1 and 24, and after inserting a predetermined number of conductors into each slot, the winding is moved from slot number 24 to slot number 2, and Winding is performed between the corresponding slots 23 until a predetermined number of conductors are inserted into each slot. Similarly numbers 3 and 2 below.
Winding is performed between the slots corresponding to numbers 2, 4 and 21, the slots 5 and 22, and the slots 6 and 19, and each slot has a predetermined number of wires. The number of conductors is inserted.

Each corresponding conductor piece of the chain winding of the armature winding piece A wound in this manner is a winding inserted into the slots at positions facing each other 180 degrees in electrical angle.

Similarly, the armature winding piece B is also wound as described above, and therefore each corresponding conductor piece of the chain winding of the armature winding piece B is located at a position opposite to each other with an electrical angle of 180°. The windings are each inserted into a slot.

On the other hand, the terminal end of the armature winding piece A inserted into the slot No. 13 and the starting end of the armature winding piece B inserted into the slot No. 36 are connected to form the center tap C terminal. The starting and ending ends of the armature winding pieces A and B inserted into the respective slots 1 and 18 become terminals X and Y. Diodes 3 and 4 are connected to these terminals X and Y, respectively.
The cathodes of the diodes 3 and 4 are connected to each other to form a positive terminal U for direct current output. Said center
The tap terminal C becomes a negative terminal V for direct current output.

Now, the conductor pieces of the armature winding piece A inserted into each slot numbered 1 to 6 (referred to as the first group of slot positions, ranging from angle 0° to angle θ°) are A ₁ , Each of the slots numbered 19 to 24 (referred to as the second group slot position)
The conductor piece of the armature winding piece A inserted in the range of 180° + θ°) is A ₂ , numbered 13 to 1.
8 slots (referred to as 3rd group slot positions)
_B1 ,
Armature winding pieces B inserted into each slot numbered 31 to 36 (referred to as the fourth group of slot positions, located in the range from angle 360°-θ° to angle 360°)
Let the conductor piece B be ₁ .

Furthermore, when it is assumed that the induced electromotive force is generated in the direction of the arrow shown in Figure 1, armature winding pieces A and B
A current as shown in FIG. 2 flows through. That is, the conductor pieces inserted into each slot numbered 1 to 6.
A load current flows through the diode 3 to A ₁ and the conductor pieces A ₂ inserted into the slots numbered 19 to 24, while the conductor pieces B ₁ inserted into the slots numbered 13 to 18, A diode 4 prevents the flow of load current to the conductor pieces _B2 inserted into each of the slots numbered 31 to 36.

When a load current flows through the conductor pieces A ₁ and A ₂ through the diode 3, an electromagnetic force is generated. However, in the armature winding shown in Figure 1, the conductor pieces A ₁ and A ₂ are wound opposite each other at symmetrical positions 180° apart, as explained above, so that the load current flows. The above-mentioned electromagnetic force generated acts evenly, the magnetic unbalance is eliminated, and no unbalanced force is applied to the rotor 2.

Conversely, when a voltage is generated _{in the} direction opposite to the arrow shown in _{FIG .}
In this case, the diode 3 blocks the flow of load current. Electromagnetic force is generated when a load current flows through conductor pieces B ₁ and B ₂ , but for the same reason as explained above, the electromagnetic force acts equally, so the magnetic imbalance is eliminated and the rotor 2 is Unbalanced force is no longer applied.

Note that the same effect as in FIG. 1 can be obtained even if the armature winding pieces A and B shown in FIG. 1 are wound at positions 180 degrees out of phase with each other and connected in series.

Although the above description has been made for a rotating field type in which the armature winding pieces are fixed and the magnetic field rotates, it goes without saying that this also applies to an armature rotating type in which the armature side is rotated.

(Effect of the invention) As explained above, according to the invention, the center
Since each armature winding piece with taps is wound in opposite positions that are 180 degrees electrically symmetrical, the magnetic imbalance that acts on the rotor during DC output is eliminated, and magnetic vibration and rotor damage are eliminated. A generator in which core runout does not occur is realized.

[Brief explanation of the drawing]

Fig. 1 is a winding diagram of an example of the armature winding of a generator according to the present invention, Fig. 2 is an explanatory diagram of current flowing through the armature winding pieces of the present invention, and Fig. 3 is a diagram showing a conventional DC output. 4 is the circuit diagram of FIG. 1, FIG. 5 is a winding diagram of the conventional armature winding, and FIG. 6 is an explanatory diagram of the current flowing through the conventional armature winding pieces. It shows. In the figure, 1 is a stator, 2 is a rotor, 3 and 4 are diodes, 5 is a slot, A and B are armature winding pieces, and A ₁ , A ₂ , B ₁ and B ₂ are conductor pieces.

Claims (1)

[Claims for Utility Model Registration] A center tap is formed at the connecting portion of each armature winding piece connected in series, and a rectifying element is provided on each side of each armature winding piece to provide DC output. in the generator, in which, with respect to said one armature winding piece constituted by a plurality of loops, two conductor pieces of individual loops constituting said plurality of loops are arranged in the first armature slot. The slot is inserted into a position belonging to the first group and a position belonging to the second group to form the loop, and the position belonging to the first group is at an angle θ from the slot position corresponding to the angle 0°. The position belonging to the second group is given in the range from the slot position corresponding to an angle of 180° to the slot position corresponding to an angle of 180° + θ°. Further, with respect to the other armature winding piece constituted by a plurality of loops, two conductor pieces of individual loops constituting the plurality of loops are arranged in a third group of slots of the armature. and a position belonging to the fourth group to form the loop, and the position belonging to the third group is at an angle of 180° from the position of the slot corresponding to the angle of 180° - θ°. The position belonging to the fourth group is given in the range from the slot position corresponding to the angle 360° - θ° to the slot position corresponding to the angle 360°. , A generator characterized in that the electromagnetic force generated by each armature winding piece acts equally on the rotating shaft of the generator rotor.