JP2005184983A - Unit article for suppressing surge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surge-suppressing unit article which superior in economy, operability, productivity, and practicality, by its ability to reduce radiation noise due to surges, not to speak of the ability to suppress the life time deterioration of a system due to unwanted surges. <P>SOLUTION: For this surge-suppressing unit article, in a transmission path for drive where surge or ringing occurs due to the mismatching between the impedance of the transmission path for drive and the impedance of a high-impedance load unit, etc., a surge-suppressing unit body is connected, in parallel with the side of the high-impedance load unit so as to put its terminal at high impedance. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention suppresses surges (unnecessary high voltage waveforms due to mismatched reflections) caused by impedance mismatch, not only improves transmission quality degradation, but also reduces the life due to insulation degradation of cables, connected devices, etc. and generates noise due to surges. The present invention relates to a surge suppression unit product that is excellent in economy, operability, productivity, and practicality.

  Conventionally, the occurrence of surge can be suppressed by matching the characteristic impedance of the cable with the impedance of the output system and the load. However, the load impedance varies widely depending on the equipment and system used, and the same impedance. Even if you intend to match, surge and ringing (vibration phenomenon caused by stray capacitance and residual inductance or reflection at the time of operation or restoration in the switching circuit) occur due to impedance deviation and frequency dependence of matching parts or cables, and signal quality is reduced. This is a cause of significant deterioration. In such a situation, not only the transmission system but also the drive system has a similar problem as the speed increases. In particular, when the load is a motor, the impedance becomes large (500Ω or more) far from the normal transmission system, so that it is extremely difficult to produce a matched cable. At present, there is a method of inserting a filter 14 'using C and L as shown in FIG. In this case, a high voltage and high current for driving the motor are passed through the filter 14 '. Since each component constituting the filter 14 'requires high power components, the mounting space is large and expensive.

  Next, it seems that the surge level was suppressed by slowing the rise time of the output circuit, or a reflection type surge suppression cable having a combined structure in which the main line and the auxiliary line were separated or integrated as previously applied. In addition, measures are taken such that the length of the applicable cable is used within a range where the influence of the surge level is small. Measures such as slowing the rise of the transmission waveform or limiting the cable length used have the disadvantage of not meeting market needs. (For example, refer to Patent Document 1).

Japanese Patent Application No. 2003-272727

  The problem to be solved is that the present invention not only suppresses the deterioration of system life due to unnecessary surges, but also reduces radiation noise due to surges, and is excellent in economic efficiency, operability, productivity and practicality. It is intended to provide surge suppression unit products.

  As shown in FIG. 1, the surge suppression unit product of the present invention is connected to the high-impedance load unit side as shown in FIG. In addition, the surge suppression unit is connected in parallel with a surge suppression unit body, and the termination is set to high impedance (for example, open system).

Unlike current systems that allow drive signals to pass through, only surges can be filtered. Retrofitting is possible for existing equipment.
2. There is no voltage decay of the drive signal.
3. EMI countermeasures by surge suppression are possible.
4). It does not require high-voltage and high-current parts, so it is low-cost and space-saving.
5). Since waveform distortion is small, high-speed deployment is possible.
It has an excellent effect.

  Hereinafter, embodiments of the surge suppression unit product 2 of the present invention will be described in detail with reference to the accompanying drawings.

  First, as shown in FIG. 1 (a), the surge suppression unit product 2 according to the first embodiment of the present invention has an impedance of a drive transmission line and an impedance of a high impedance load unit {driver (motor) in the drawing}. This is a surge suppression unit product in which a surge suppression unit product is connected in parallel to the high impedance load unit side in a drive transmission line in which a surge is generated due to mismatch, and the termination is made high impedance. Here, as one of the methods for obtaining a high impedance, for example, an open system can be used. As shown in the figure, since the motor drive current hardly flows in the surge suppression unit product of the present invention, a low power structure is sufficient.

  The structure of the surge suppression unit product 2A of the second embodiment of the present invention is shown in FIG. In the surge suppression unit product of the first embodiment, the surge suppression body 1A shown in FIG. 1 (b), which is composed of one or a plurality of insulation core wires coated with an insulator on a conductor, has a predetermined length in the unit product. Or a surge suppression unit product 2A in which a predetermined length is provided in the unit product and a shield is provided in the unit product. Here, the connection terminal 12 for connecting to the product which suppresses a surge is provided in the surge suppression unit product 2A. The surge suppressor 1A is a typical single-layer type and three-layer type in which the insulator is not shielded. As a typical example of the surge suppression unit product, a urethane wire of a magnet wire is used, but it is not limited to this.

  The structure of the surge suppression unit product 2B of the third embodiment of the present invention is shown in FIG. In the surge suppression unit product of the first embodiment, one or a plurality of insulation core wires made of a high dielectric constant insulator and / or a high dielectric loss insulator are provided on the conductor, and a shield is further provided thereon. 1 is a surge suppression unit product in which a surge suppressor 1B shown in FIG. 1 (c) having a sheath applied thereon is wound into a unit product for a predetermined length or provided in a unit product. Similarly, the connection terminal 12 is provided in the surge suppression unit product 2B. The case of a typical single layer type and a three layer type is illustrated. Here, as a representative example of a material having an insulating material having a high dielectric constant and a high dielectric loss, there is vinylidene fluoride or the like. As the sheath, a typical PVC was used.

  The structure of the surge suppression unit product 2B of the fourth embodiment of the present invention is a modification of the three-layer type of the third embodiment, and includes a plurality of one insulation core wire of the third embodiment shown in FIG. The surge suppressor 1C is provided with a predetermined length in the unit product or provided with a predetermined length in the unit product. Surge suppression unit product. Here, as another modification of the fourth embodiment, the outer shield 7B may be omitted.

  The structure of the surge suppression unit product 2B of the fifth embodiment of the present invention is omitted in the drawing, but in the second, third, and fourth embodiments, the conductor itself promotes high-frequency noise degradation, increases resistance, and inductance. This is a surge suppression unit product covered with a conductive material or plating to increase the resistance. Here, examples of the conductive material and the plating material include materials having a larger conductor resistance than copper and a large complex permeability, such as typical NI plating.

  The structure of the surge suppression unit product 2B of the sixth embodiment of the present invention is omitted in the drawing, but the surge suppression body comprising any combination of the second, third, fourth, and fifth embodiments has a predetermined length. Or a surge suppression unit product provided with a predetermined length in the unit product.

  The surge suppression unit product of the seventh embodiment is also omitted in the drawings, but in each of the first to sixth, the predetermined length of the surge suppression unit product is within 10 times the length of the drive cable in accordance with the suppression effect. This is a surge suppression unit product. Here, the predetermined length of 1 to 4 times the length of the drive cable in accordance with the suppression effect showed particularly preferable results.

  Since it is the above structure, since this invention can suppress a noise, without flowing a drive current, compared with the conventional product for 690V 30A, it became possible to reduce a volume to about 1/3 or less.

  Next, Table 1 below shows the results of a surge waveform comparison between the surge suppression unit product of the present invention and a conventional cable in a cable 10 m.

  From this, the conventional cable has a large reflection influence due to the load, whereas the surge suppression unit product of the present invention has a large surge suppression effect due to the effect of the surge suppression unit product. Table 2 below shows the results of comparison of the occurrence of surge due to the connection of a high load unit (for example, a motor) when using a conventional cable and a longer 40 m as an effect of using the surge suppression unit product of the present invention.

  From this, it can be seen that the cable 40m shows good results as in the case of the cable 10m.

  In the embodiment of the present invention, the description has been made taking the 1 and 3 insulated core wires as representative examples, but the number of the insulated core wires is not limited thereto. In addition, typical PVC was used as the sheath material, typical braided shield was used as the shield, and typical vinylidene fluoride was used as the insulating material having both high dielectric constant and high dielectric loss. It is not limited to. Furthermore, in the case of signal conductor plating, Ni is taken as an applicable material, but the present invention is not limited to this. Moreover, about the surge suppression unit goods of this invention, as shown in FIG.1 (b), what changed some like a TP (twisted pair) line | wire may be used. Although the cable is used here, the same effect can be obtained with other transmission media such as an FPC or a strip line of a laminated tape wire. Further, it goes without saying that various types of modifications such as making and joining several types of surge suppressors of the present invention and combining them with parts are included. In addition, the application range of this component is not limited to motors as typical examples of high impedance loads, but it can also be applied to surges and high-speed transmission lines during lighting and power supply switching, and has a wide application range.

(A) is explanatory drawing of the connection structure of the surge suppression unit goods 1 by 1st Example of this invention. (B) is an explanatory view of a surge suppressor 1A using a TP wire according to the second embodiment of the present invention and other modifications. (C) is explanatory drawing of the surge suppression body 1B by the 3rd, 4th Example of this invention. (D) It is explanatory drawing of the surge suppression unit goods 2A by 2nd Example of this invention. (E) It is explanatory drawing of the surge suppression unit goods 2B by the 3rd, 4th Example of this invention. (A) is explanatory drawing which inserted conventional filter 14 '. (B) is an explanatory view showing a state in which surge or ringing occurs due to impedance mismatch between the impedance Z1 ′ of the conventional motor drive transmission line and the high load impedance (high impedance) Z2 ′ of the motor or the like. .

Explanation of symbols

1A, 1B, 1C Surge suppressor of the present invention 2A, 2B Surge suppression unit product 3A Insulation core 4A, 4B Conductor 5B High dielectric constant insulator and / or high dielectric loss insulator 6A Insulator 7B Shield 8A, 8B Sheath 9 Drive transmission line 10 Drive circuit 11 High impedance load unit (application example motor)
12 connection terminal 13 outer case Z impedance 9 'drive transmission line 10' drive circuit 11 'high impedance load unit (application example motor)
14 'Conventional filter Z1', Z2 'Impedance

Claims (7)

  In the drive transmission path where a surge occurs due to the impedance mismatch between the drive transmission line impedance and the high impedance load unit, the surge suppression unit body is connected in parallel to the high impedance load unit side, and the termination is made high impedance. Features surge suppression unit product.   The surge suppression unit product according to claim 1 is configured such that a surge suppressor composed of one or more insulated core wires coated with an insulator on a conductor is wound in a predetermined length in the unit product or a predetermined length in the unit product. A surge suppression unit product provided with a shield in the unit product.  The surge suppression unit product according to claim 1 is provided with one or a plurality of insulation core wires composed of a high dielectric constant insulator and / or a high dielectric loss insulator on a conductor, and further a shield is provided thereon, A surge suppression unit product comprising a surge suppressor with a sheath wound on the unit product for a predetermined length or a predetermined length in the unit product.   In Claim 3, the surge suppressor having a plurality of the insulation core wires of Claim 3 and further shielded thereon and sheathed thereon is wound into the unit product for a predetermined length. Or a surge suppression unit product characterized by providing a predetermined length in the unit product.  5. A surge suppression unit product according to claim 2, wherein the conductor itself is coated with a conductive material or plating in order to promote high-frequency noise deterioration and increase resistance and inductance. .   A surge suppression unit product comprising a surge suppressor comprising a combination of any one of claims 2, 3, 4, and 5 having a predetermined length or a predetermined length in a unit product.  The surge suppression unit product according to any one of claims 1 to 6, wherein the predetermined length of the surge suppression unit product is set to a length within 10 times of the drive cable in accordance with the suppression effect.

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