JPS61110411A - Transformer - Google Patents

Abstract

PURPOSE:To remove ringing effectively so as to attain an excellent waveform transmission characteristic by a method wherein conductors of some or all conductor wires constituting a primary coil are made to contact directly with electroconductive members provided on the outer periphery of the conductors or on a member whereon winding is made, in a transformer constructed by winding the coil on said member. CONSTITUTION:A primary coil 3 is wound on a member 2 on which winding is made, by using a conductor wire 7 which is formed by providing an electroconductive member 6 directly on the outer periphery of a conductor 5. According to this construction, no insulating layer exists between the conductor 5 and the electroconductive member 6, but a line capacity (distributed capacity) 8, and an equivalent resistance 9 and an inductance component 10 of the electroconductive member 6, exist between the adjacent conductors 5. As the result, the voltage of the primary coil 3 is damped effectively even in the minute sections of the coil 3 by the equivalent resistance 9 existing between the conductors 5, and thus ringing is removed from a waveform responsive to a frequency characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to high frequency transformers such as switching transformers and pulse transformers, which are used in various electrical devices.

<Prior art> In general, in high-frequency transformers such as switching transformers and pulse transformers, the winding widths of the -order and secondary fills are set to be approximately the same in order to obtain a transformer with good waveform transmission characteristics. It is known to reduce the leakage flux and to reduce the interlayer capacitance by winding the secondary film and the secondary film with a certain distance between them.

In conventional high-frequency transformers, the -order film and secondary coil are connected to a core IIJ made of a conductor, as shown in Figure 6.
It was constructed by winding a 1 m62 conductor whose outer periphery was coated with an insulating film 61.

<The neck point to be solved by the invention> However, in such a configuration, as shown in FIG. 7, there is a line capacitance 11cs and an inductance component Ls inherent to the conductor ts52 configuration between the conductor cores 1850. There is no means for damping (braking) the voltage of the conductor 62, and the example of the circuit used in FIG. According to 68 internal resistance, 2. shows load resistance),
As is clear from the frequency characteristics shown in Figure 9, there are resonance points at a, b, c, and d in the frequency characteristics, and among these resonance points, the resonance state at b is
As is clear from the response waveform for the frequency characteristics shown in the figure, ringing (R) occurs, and as a result, there is a problem in that good waveform transmission characteristics cannot be obtained.

On the other hand, as shown by the broken line in the example of the circuit used in FIG. 8, an external correction capacitor @Cc is attached to the secondary filter 57 side.

It has been considered to remove ringing by connecting a correction resistor hole, etc., but even in this case, as shown in Figure 11, ringing (FL) remains in the response waveform to the frequency characteristics, and it is still a good result. It was not possible to obtain waveform transmission characteristics.

As shown in Fig. 9, when there are multiple resonance points in the frequency characteristics, the capacitance component is used to strengthen the high frequency region in order to eliminate ringing, which may significantly sacrifice the frequency characteristics. Or, it is necessary to consider implementing complex corrections.

Means for Solving the Problems> The present invention has been made to solve the above problems.
- In a transformer in which a secondary film and a secondary fill are wound around a wound part, the conductor of some or all of the conductors constituting the fill is connected to the conductor provided on the outer periphery of the conductor or on the wound part. It is made by directly contacting the 11Ea material.

<Example> Hereinafter, an example of the transformer of the present invention will be described in detail with reference to the drawings. In FIG. 1, 1 is a core for a transformer, and the core 1 has a wound wire 8 made of a coil bobbin! A portion of the coil 3 and the secondary fill 4 are wound in a laminated manner around the wound portion 2 (core 1) via S2. As shown in FIG. 2, the primary coil 3 wound around the wire-wound part 2 is made by directly attaching a conductive member 6 containing carbon, which has a higher resistance value than the conductor 5, to the outer periphery of a conductor 5 made of copper wire or the like. It is constituted by a λ conductor 7 which is provided (contacted).

In a transformer having such a configuration, a conductive member 6 is provided directly on the outer periphery of the conductor 5 for wave winding and 11w62! 17 to partially wind the coil 3, there is no insulating layer between the conductor 5 and the conductive WS material 6, and the line capacitance ( distributed capacitance) 8 and conductive member 6
The equivalent resistance 9 and inductance component 10 of the conductor 5 are present, and as a result, the voltage of the coil 3 is partially damped to a minute section of the coil 3 by the equivalent resistance 9 of the conductor 5. An example of the circuit used as shown in Fig. 4 (in the figure, 1 is the core, 6 is a partial coil, 4 is a secondary coil, 11 is a
is the internal resistance of the signal source 12, and 16 is the load resistance), as shown in FIG. 5, ringing does not occur in the response waveform to the frequency characteristics.

In one embodiment of the transformer of the present invention, a case has been described in which the -order coil is constructed using a conducting wire in which a conductive member is brought into direct contact with the outer periphery of the conductor. Of course, only the coil, or both the secondary film and the secondary film may be constructed using a conductive wire in which a conductive member is brought into direct contact with the outer periphery of the conductor. Also,
In the embodiments of the present invention, the conducting wire constituting the fill has been described in which the conductive member is brought into direct contact with the outer periphery of the conductor. Even if a conductive member is provided on the surface so as to contact the conductor 11s material of the coil, or the entire coil is further separately connected to the conductor W1. In this case, an insulating layer may be provided between the conductor of the conductor and the conductive member, between the conductive member on the outer periphery of the conductor and the conductive member on the wave winding part I, or between the conductive member on the outer periphery of the coil. It does not exist at all and produces the same effect as in the example. Furthermore, in one embodiment of the present invention, a coil is wound around the wave winding part using a conductor wire with a conductive member directly provided on the outer periphery of the conductor. A coil may be wound using a provided normal conducting wire, and a conductive member may be provided on the surface of the wound portion so as to be in contact with the coil. In this case, the wave winding of the conducting wire i1!
The insulating coating is removed from the part that contacts the conductive member provided on the part, and the conductor is brought into direct contact with the conductive member of the wound part.

Furthermore, a bare wire such as a tin-plated wire may be used as the conductor of the coil, and this is effective if applied when the coil winding distribution is sparse with respect to the wave-wound ts portion. In one embodiment of the present invention, a fill bobbin is used as the counter winding, wave winding, and winding. It is also possible to configure
It can also be applied to air-core coils that do not use a core.
The configuration of the transformer can be changed and modified as necessary, such as being applicable to products that consist of only a part of the coil, such as a KFIL.
It is something that can be transformed.

<Effects of the Invention> As described above, according to the transformer of the present invention, in the transformer in which at least a portion of the coil is wound around the wound portion, the conductor of some or all of the conductive wires constituting the coil , the outer circumference or wave winding of the conductor I! It is brought into direct contact with a conductive member provided in the section, and produces the following effects. In other words, the voltage is damped by the resistance component of the coil itself (equivalent resistance existing between the conductors).
Capacitance components do not play a role in damping, ringing can be effectively removed even in minute sections of the coil without sacrificing frequency characteristics, and good waveform transmission characteristics can be obtained.

In addition, ringing can be removed more reliably than when external correction means (capacitance, resistance, etc.) are attached to remove ringing, and in addition to improving waveform transmission characteristics, the number of parts and costs can be reduced. As described above, according to the present invention, ringing can be removed with a simple configuration without impairing frequency characteristics, and the present invention will become increasingly effective in the future, especially as a high frequency transformer.

[Brief explanation of the drawing]

FIG. 1 shows the IJlI of the transformer in one embodiment of the present invention.
Figure 1 is also a schematic configuration diagram of the fill.
Figure 3 is a schematic equivalent circuit diagram between conductors constituting the fill, Figure 4 is a schematic circuit diagram of an example circuit using a transformer, Figure 5 is a response waveform diagram for frequency characteristics, and Figure 6 is a diagram of response waveforms to frequency characteristics.
The figure is a schematic diagram of a coil used in a conventional transformer.
Figure 7 is a schematic equivalent circuit diagram between conductors that make up the coil, Figure 8 is a schematic circuit diagram of an example of a circuit using a transformer, Figure 9 is a frequency characteristic waveform diagram, and Figure 10 is a diagram of frequency characteristics. Response Waveform Diagram, FIG. 11C is a response waveform diagram for frequency characteristics in a state where a correction means is also externally attached. 2... Winding part, 3... -order coil, 5... conductor, 6... conductive member, 7... conducting wire,

Claims (1)

[Claims] In a transformer in which at least a primary coil is wound around a wound portion, a conductor of some or all of the conductive wires constituting the coil is provided on the outer periphery of the conductor or on the wound portion. A transformer characterized by being in direct contact with.