JP2010056117A - Electromagnetic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic device having a similar size by employing a transformer having specifications similar to those of an edgewise coil although using magnet wires. <P>SOLUTION: A secondary coil L2 for high voltage generation is constituted by winding a side surface of a ferrite core 11 with a magnet wire 12, constituted by connecting parallel-connected magnet wires 121 to 123 in parallel, in a longitudinal state while folding it back in a plurality of layers. Bobbins 15 and 16 are arranged which perform insulation between a high voltage and a low voltage before and after the secondary coil L2 is folded back. The secondary coil L2 which is thus constituted is stored in a housing 17, and a filler 18 is charged and hardened. A groove 171 is formed in an outer periphery of the housing 17 at a position opposite the ferrite core 11, and a primary coil L1 is formed in the groove 171. Insulation of the secondary coil L2 is secured while the magnet wires 12 are used to actualize the electromagnetic device which has a high voltage and a large current while the coil length of the secondary coil L2 is suppressed short. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electromagnetic device that is used in a lamp lighting device for lighting a high-pressure discharge lamp and generates a high-voltage pulse voltage.

A conventional electromagnetic device does not use a bobbin that acts as an insulating member on the side surface of a rod-shaped ferrite core, but winds a secondary coil for high voltage in which a flat wire is edgewise wound in one layer, and on the upper layer A primary coil is wound. The secondary coil improves the insulation function by securing the insulation distance between the low voltage side and the high voltage side by separating the distance between the start and end of winding. (For example, Patent Document 1)
JP 2006-108721 A

  The technique of Patent Document 1 described above increases the insulation function by securing the insulation distance between the low voltage side and the high voltage side by winding the secondary coil in one layer and separating the distance between the beginning and end of winding. However, the edgewise coil using a rectangular wire capable of handling a high voltage and a large current has a problem that its cost is high due to its structure. Further, in order to configure the same standard as a flat wire using a general magnet wire, there is a problem that the wire to be wound becomes thick, the coil length of the secondary coil becomes long, and the coil size becomes large.

  An object of the present invention is to provide an electromagnetic device of the same size with a transformer having the same specifications as an edgewise coil while using a magnet wire.

  In order to solve the above-described problems, an electromagnetic device of the present invention includes a magnetic body, a secondary coil for generating a high voltage, in which a magnet wire having a circular cross section is wound over a plurality of layers on a side surface of the magnetic body, and An insulator that provides insulation between the high voltage and the low voltage before and after folding of the secondary coil itself, and a primary coil wound at a position facing a side surface of the magnetic body, and the magnet wire includes the magnetic wire A plurality of parallel connections are made on the side surface of the body.

  In addition, the electromagnetic device includes a magnetic body, a secondary coil for generating a high voltage in which a magnet wire is folded back and forth symmetrically on a side surface of the magnetic body, and a high voltage before and after the secondary coil is folded back. And a primary coil wound at a position facing the side surface of the magnetic body, and a plurality of the magnet wires are connected in parallel to the side surface of the magnetic body. It is characterized by being.

  According to the present invention, it is possible to realize an electromagnetic device for generating a high voltage pulse voltage such as a lamp lighting device for lighting a small high pressure discharge lamp that can flow a large current using a magnet wire having a circular cross section.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  1 to 8 all illustrate an embodiment of the electromagnetic device according to the present invention. FIG. 1 is a cross-sectional view, FIG. 2 is a cross-sectional view of the main part of FIG. 1, and FIG. 4 is a perspective view of the main part of FIG. 3, FIG. 5 is a perspective view of the main part of FIG. 1, FIG. 6 is a sectional view of FIG. 5, FIG. 7 is a perspective view of the main part of FIG. It is a circuit diagram.

First, in FIG. 1, 11 is a ferrite core which is a cylindrical magnetic body having a specific resistance of, for example, 10 ³ Ω / m or more. A magnetic coil 12 such as enameled copper wire, polyurethane copper wire, or polyesterimide copper wire is used for the ferrite core 11, and the secondary coil L2 is formed by winding three layers and winding, for example, 45 turns. In this case, the coil length wound around the ferrite core 11 is almost the same as the length wound around 15 turns.

  As shown in FIG. 2, the magnet wire 12 is wound with three magnet wires 121 to 123 arranged side by side, and the magnet wires 121 to 123 arranged side by side are inclined. The magnet wires 121 to 123 are used as one magnet wire by connecting both ends.

  One end of such a magnet wire 12 is embedded in a support ring 13 serving as an insulating positioning means in which an engagement hole 131 is engaged from one end of the ferrite core 11 as shown in FIG. Bonded to the conductive terminal 14. As shown in FIG. 4, the support ring 13 is formed with an inclined portion 132 that is inclined outward from the engagement hole 131, and serves as a guide for winding the magnet wire 12 in an inclined state.

  The first layer L <b> 2 a of the secondary coil L <b> 2 winds 15 turns densely in a direction away from the support ring 13 on the ferrite core 11 in a state along the inclination of the inclined portion 132 of the support ring 13.

  After the winding of the first layer L2a, the communication hole 151 of the insulating bobbin 15 shown in FIGS. 5 and 6 is inserted so as to be laminated. For example, three hooks 152 to 154 are integrally formed at one end of the bobbin 15, and a hook 156 having an inclined portion 155 on the hook 154 side is integrally formed at the other end. The bobbin 15 is inserted into the inclined portion 132 of the support ring 13 by the flange 152. The magnet wire 12 connected to the magnet wire 12 of the first layer L2a is led out from the notch 157 formed in the inclined portion 155 of the bobbin 15 to the outside of the bobbin 15, and is applied to the inclined portion 155 in a state along the inclination. The bobbin 15 is tightly wound directly for 15 turns in the heel 154 direction.

  Further, the second layer L2b is inserted from the opening 162 of the insulating bobbin 16 having the bottom 161 also shown in FIG. A flange 163 is formed on the outer periphery of the bobbin 16 near the opening 162, and an inclined portion 164 that is inclined in the direction opposite to the bottom 161 is integrally formed on the flange 163.

  The magnet wire 12 connected to the magnet wire 12 forming the second layer L2b is led to the outside of the bobbin 16 through the notch 165 formed in the bobbin 16, and is applied to the inclined portion 164, and is on the bobbin 16 along the inclination. The third layer L2c is formed by densely winding 15 turns in a direction away from the ridge 163.

  The magnet wire 12 at the winding end portion of the third layer L2c can be connected to the outside via a terminal (not shown) in a state where the three magnet wires 121 to 123 are electrically connected. The terminal connected at the end of winding is at a higher voltage than the terminal 14 on the low voltage side at the beginning of winding, but the position is far away and a sufficient insulation distance can be secured.

  The heights of the flanges 152 to 154 of the bobbin 15 and the flange 163 of the bobbin 16 are set so as to be slightly higher than the third layer L2c in a state where the third layer L2c is wound. In addition, valleys 1523 and 1534 formed between the ridges 152 and 153 and between the ridges 153 and 154 respectively have a depth similar to the height of the ridges 152 to 154.

  The outside of the secondary coil L2 formed in this manner is covered with a resin casing 17, for example. The casing 17 is filled with an insulating filler 18 to improve the insulating property of the secondary coil L2 configured in the casing 17.

  The primary coil L1 is wound several turns at a position facing the ferrite core 11 with the housing 17 therebetween. The primary coil L1 is directly wound around the groove 171 formed on the outer periphery of the housing 17, and after winding, the primary coil L1 is reliably supported by the housing 17 by filling the groove 171 with a curable resin. I try to do it.

  The flanges 152 to 154 of the bobbin 15 are formed for the purpose of ensuring a creepage distance between the winding start portion of the secondary coil L2 and the intermediate portion where the second layer L2b is folded back to the third layer L2c.

  The secondary coil L2 and the primary coil L1 are electromagnetically coupled through the ferrite core 11, whereby the transformer T of the circuit shown in FIG.

  With the configuration described above, the cross-sectional area of the secondary coil L2 including the magnet wires 121 to 123 is almost the same as the state in which the rectangular wire is edgewise wound, and the magnet wire having a circular cross section is used for high voltage and large current. It is possible to form a corresponding short and long coil. Also, by separating the distance between the low voltage side at the beginning of winding and the high voltage side at the end of winding, the insulation distance between the low voltage side and the high voltage side can be secured, improving the insulation function, while keeping the coil length of the secondary coil short, high voltage, A large current electromagnetic device can be realized. This is because the bobbin 15 and the bobbin 16 which are insulators are combined in a portion where the voltage difference between the windings is large to ensure insulation.

  Note that the casing 17 is for ensuring insulation between the secondary coil L2 and the primary coil L1, and therefore, the same function can be achieved even when the insulating tape is simply wound.

  In this embodiment, by using a plurality of inexpensive magnet wires connected in parallel, it is possible to ensure a cross-sectional area substantially the same as a state in which a rectangular wire is wound edgewise. In addition, the secondary coil of a plurality of magnet wires connected in parallel is folded and wound, and a cylindrical insulator is disposed at a location where the distance between the low voltage part and the high voltage part before and after the folding is close, thereby insulating the secondary coil. It is possible to realize a high voltage, large current electromagnetic device in which the coil length of the secondary coil is kept short while ensuring the above.

  Furthermore, the winding thickness of the secondary coil can be suppressed by winding the plurality of magnet wires connected in parallel in a state of being inclined with respect to the ferrite core, which contributes to miniaturization of the electromagnetic device.

  FIG. 9 is a circuit diagram for explaining an example in which one embodiment of the electromagnetic device of the present invention is applied to a lighting device for a high-pressure discharge lamp.

  In FIG. 9, the power source Vin generates a DC voltage. The power source Vin generates constant power. The power source Vin is constituted by, for example, an output smoothing capacitor of a constant power control chopper circuit.

  The positive output terminal of the power source Vin is connected to the drains of the MOS transistors Q1 and Q3 via the power source line. The negative output terminal of the power source Vin is connected to the sources of the MOS transistors Q2 and Q4 via a reference potential line. The source of the transistor Q1 and the drain of the transistor Q2 are connected to each other. Further, the source of the transistor Q3 and the drain of the transistor Q4 are connected to each other.

  These transistors Q1 to Q4 constitute a bridge type DC / AC inverter that converts a DC voltage from the power source Vin into an AC voltage.

  The first connection point P1 between the source of the transistor Q1 and the drain of the transistor Q2 is connected to the source of the transistor Q3 and the transistor Q4 via a first circuit portion including one end of the primary coil L1, the first stage booster circuit 91, and the capacitor C1. Is connected to the second connection point P2 with the drain of the first. The other end of the primary coil L1 is connected to the first stage booster circuit 91. In addition, a second circuit unit including the secondary coil L2 and the lamp LP is connected between the first connection point P1 and the second connection point P2. A high pressure discharge lamp is used as the lamp LP.

  Here, the transformer T in FIG. 9 corresponds to the electromagnetic device described with reference to FIGS. 1 to 8 including the primary coil L1, the secondary coil L2, and the ferrite core 11.

  A coil La of the first stage booster circuit 91 is connected between one end of the primary coil L1 and the capacitor C1. The other end of the primary coil L1 is connected in series with the discharge gap G and the capacitor C2, and is connected to one end of the transformer Lb and the other end of the primary coil L1. The other end of the transformer Lb is connected to a connection point between the discharge gap G and the capacitor C2 via a diode D1 having the polarity shown. The coils La and Lb constitute a transformer.

  The capacitor C1 is provided for vibration waveform formation and current limitation. Moreover, the transformer T comprised by the primary coil L1 and the secondary coil L2 makes the primary coil L1 the primary side, and makes the secondary coil L2 the secondary side. The number of turns of the secondary coil L2 is set to n times (n is a positive number) the number of turns of the primary coil L1. As the turn ratio n, for example, a value of several times to several hundred times is set.

  At the time of starting the lamp, a power source Vin for supplying a positive output to the power supply line and a negative output to the reference potential line is supplied to the transistors Q1 to Q4 constituting the DC / AC inverter. At the start of lighting of the lamp LP, the first high frequency is set as the drive frequency of the transistors Q1 to Q4. This first high-frequency control signal is supplied to the transistors Q1 to Q4 to turn them on / off.

  The bridge circuit simultaneously controls on / off of the transistors Q1, Q4 and simultaneously controls on / off of the transistors Q2, Q3. In order to prevent a short circuit, the transistors Q1 to Q4 are all turned off for a short time.

  When the transistors Q1 and Q4 are on, a current flows from the positive output terminal of the power source Vin to the negative output terminal via the transistor Q1, the primary coil L1, the coil La, the capacitor C1, and the transistor Q4. On the contrary, when the transistors Q2 and Q3 are on, a current flows from the positive output terminal of the power source Vin to the negative output terminal via the transistor Q3, the capacitor C1, the coil La, the primary coil L1, and the transistor Q2.

  When the transistors Q1 and Q4 are on, the capacitor C1 is charged via the primary coil L1 and the coil La, and the terminal voltage of the capacitor C1 rises to the voltage Vin of the power source Vin. Next, due to the counter electromotive force generated in the primary coil L1 and the coil La, the voltage VL1 + VLa generated in the primary coil L1 and the coil La is added to the terminal voltage of the capacitor C1 and rises to Vin + VL1 + VLa. Next, free vibration occurs between the primary coil L1, the coil La, and the capacitor C1, and the terminal voltage of the capacitor C1 converges to a predetermined value while changing the polarity. Even when the transistors Q2 and Q3 are on, the same operation as when the transistors Q1 and Q4 are on is performed.

  Thereby, the voltage according to the turns ratio can be generated in the coil Lb by the voltage generated in the coil La.

  The voltage of the coil Lb is rectified by the diode D1, and charges are accumulated in the capacitor C2. The capacitor C2 is repeatedly charged every time the polarity inversion operation of the bridge circuit is performed in which the transistors Q1 and Q4 and the transistors Q2 and Q3 are turned on and off to switch the conduction path of the bridge circuit. As a result, the terminal voltage of the capacitor C2 gradually increases. When the terminal voltage of the capacitor C2 rises to the gap voltage Vg of the discharge gap G, a discharge occurs in the discharge gap G, a current flows through the loop of the capacitor C2, the discharge gap G, and the primary coil L1, and the secondary coil L2 is caused by electromagnetic induction. A sufficiently large lamp starting voltage is generated. A voltage generated in the secondary coil L2 is applied to the lamp LP.

  Further, since a voltage is also generated in the primary coil L1 every time the polarity inversion operation of the bridge circuit is performed, a voltage corresponding to the turn ratio of the primary coil L1 and the secondary coil L2 is generated in the secondary coil L2, and is generated at both ends of the lamp LP. Applied.

  Thus, by driving on / off of the transistors Q1 and Q4 and the transistors Q2 and Q3 at the first high frequency, the first-stage booster circuit 91 performs a boost operation, and the terminal voltage of the capacitor C2 increases. This boosting operation is performed in synchronization with the polarity inversion operation of the bridge circuit. As an example, the capacitor C2 reaches the discharge gap voltage Vg and is discharged by several to tens of thousands of operations.

  As the discharge gap G is discharged, the capacitor C2 voltage is applied to the primary coil L1, a high voltage is generated in the secondary coil L2 by the electromagnetic induction action of the transformer T, and a high voltage is applied to the lamp LP.

  Further, the voltage applied to the primary coil L1 for each polarity reversal operation of the bridge circuit at a time different from such a high voltage generation operation depends on the turn ratio between the primary coil L1 and the secondary coil L2. It is electromagnetically induced in the secondary coil L2. As a result, a relatively low high voltage is generated across the lamp LP.

  That is, for each polarity reversal operation of the bridge circuit, a relatively low high voltage is generated in the secondary coil L2 and can be applied to the lamp LP, and in synchronization with the polarity reversal operation of several to tens of thousands of times, A high voltage is generated in the secondary coil L2 and can be applied to the lamp LP. When the lamp LP is lit by the low voltage generated in the secondary coil L2, thereafter, the current flowing through the first circuit section becomes sufficiently small, and the secondary coil L2 has a relatively large voltage enough to light the lamp LP. Will not occur.

  Further, even when the lamp LP is not lit at a relatively low high voltage generated in the secondary coil L2, a high voltage is generated in the secondary coil L2 by repeating the polarity reversal operation. Lights up. When the lamp LP is turned on, a relatively large voltage is not generated in the secondary coil L2 so that the lamp LP is turned on thereafter.

  As described above, at the time of start-up, the boosting operation is generated in the transformer T at the same time as the boosting operation is generated in the capacitor C2 by the free vibration operation of the primary coil L1 and the coil La and the capacitor C1 during the polarity inversion operation of the bridge circuit. . During this free vibration, a voltage applied to the coil La is induced in the coil Lb by a boosting action according to the turns ratio of the coils La and Lb. The voltage is rectified by the diode D1 and charged in the capacitor C2. As described above, the free vibrations of the primary coil L1, the coil La, and the capacitor C1 converge until the next polarity inversion, and the current becomes substantially zero.

  The starting voltage to the lamp LP is of two types: a relatively low high voltage that can be generated every time the polarity inversion operation of the bridge circuit is performed, and a high voltage that can be generated each time the discharge gap is discharged. Thus, it is possible to start at a low voltage under conditions where the lamp start is likely to occur such as when the lamp temperature is low, and start at a high voltage under conditions where the lamp start is difficult to occur such as when the lamp temperature is high.

  As the primary coil L1 and the secondary coil L2 constituting the transformer T that generates a high voltage of such a lighting circuit, a high voltage with a short coil length and a large voltage that are almost the same as the state in which a rectangular wire is wound edgewise while using a magnet wire are used. Using an electromagnetic device that can handle current contributes to space saving and low cost circuit configuration.

  10 to 12 are diagrams for explaining another embodiment of the electromagnetic device according to the present invention. FIG. 10 is a sectional view, FIG. 11A is a perspective view of the main part of FIG. 10, and FIG. 11 (a) is a side view, and FIG. 12 is a circuit diagram of FIG. In this embodiment, two secondary coils are formed in one primary coil. The same functional parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In FIG. 10, a support ring 13A is attached to the intermediate portion of the ferrite core 11, and first and second secondary coils L21 and L22 are formed on both sides of the support ring 13A. The first and second secondary coils L21 and L22 are the same as those in FIG. 1 except that the ferrite core 11 and the support ring 13A of the secondary coil L2 are used in common. As shown in FIGS. 11A and 11B, the support ring 13A has inclined portions 132 formed on both sides.

  In other words, the first secondary coil L21 starts winding the magnet coil 12A from the terminal 141 and directly winds it around the ferrite core 11 for 15 turns to form the first layer L2a. The bobbin 15 shown in FIG. 5 is fitted onto the first layer L2a, folded back through the notch 157, and wound on the surface of the bobbin 15 for 15 turns to form the second layer L2b. The bobbin 16 shown in FIG. 7 is fitted to the second layer L2b, folded back through the notch 165, and closely wound 15 turns on the outer peripheral surface of the bobbin 16 in the direction away from the flange 154 of the bobbin 15, and the third layer L2c To do.

  Similarly, the second secondary coil L22 starts winding the magnet coil 12B from the terminal 142 and directly winds it around the ferrite core 11 for 15 turns to form the first layer L2a. The bobbin 15 shown in FIG. 5 is fitted onto the first layer L2a, folded back through the notch 157, and wound on the surface of the bobbin 15 for 15 turns to form the second layer L2b. The bobbin 16 shown in FIG. 7 is fitted to the second layer L2b, folded back through the notch 165, and closely wound 15 turns on the outer peripheral surface of the bobbin 16 in the direction away from the flange 154 of the bobbin 15, and the third layer L2c To do.

  The primary coil L1 is wound directly around the groove 171 formed on the outer periphery of the housing 17 facing the vicinity of the ferrite core 11 where the support ring 13A is attached. After winding, the groove 171 is filled with a curable resin so that the primary coil L1 is reliably supported by the housing 17.

  As described above, the first and second secondary coils L21 and L22 and the primary coil L1 are electromagnetically coupled through the ferrite core 11, thereby realizing the transformer T of the equivalent circuit shown in FIG. .

  The support ring 13A is used for both the first and second secondary coils L21 and L22, but may be a separate member.

  In this embodiment, even in the electromagnetic device that forms the first and second secondary coils with a common ferrite core, a rectangular wire is edgewise wound by using a plurality of inexpensive magnet wires connected in parallel. It is possible to ensure a cross-sectional area almost the same as that in the above state. In addition, the secondary coil of a plurality of magnet wires connected in parallel is folded and wound, and a cylindrical insulator is disposed at a location where the distance between the low voltage part and the high voltage part before and after the folding is close, thereby insulating the secondary coil. It is possible to realize a high voltage, large current electromagnetic device in which the coil length of the secondary coil is kept short while ensuring the above.

  Furthermore, the winding thickness of the secondary coil can be suppressed by winding the plurality of magnet wires connected in parallel in a state of being inclined with respect to the ferrite core, which contributes to miniaturization of the electromagnetic device.

  In this embodiment, by using a plurality of inexpensive magnet wires connected in parallel, it is possible to ensure a cross-sectional area substantially the same as a state in which a rectangular wire is wound edgewise. In addition, the secondary coil of a plurality of magnet wires connected in parallel is folded and wound, and a cylindrical insulator is disposed at a location where the distance between the low voltage part and the high voltage part before and after the folding is close, thereby insulating the secondary coil. It is possible to realize a high voltage, large current electromagnetic device in which the coil length of the secondary coil is kept short while ensuring the above.

  Furthermore, the winding thickness of the secondary coil can be suppressed by winding the plurality of magnet wires connected in parallel in a state of being inclined with respect to the ferrite core, which contributes to miniaturization of the electromagnetic device.

  FIG. 13 is a circuit diagram corresponding to FIG. 9 for explaining an example in which the electromagnetic device of the present invention described in FIGS. 10 to 12 is applied to a lighting device for a high pressure discharge lamp. This circuit diagram is different only in that a second secondary coil L22 having the primary coil L1 and the ferrite core 11 in common is formed between the lamp LP and the second connection point P2. Different points will be described.

  The number of turns of the first and second secondary coils L21 and L22 of the transformer T used in this application example is the same. The coil end on the high voltage side of the first secondary coil L21 is connected to one end of the lamp LP, and the coil end on the high voltage side of the second secondary coil L22 is connected to the other end of the lamp LP.

  In this configuration, the voltage generated at the coil end of the first secondary coil L21 and the coil end of the second secondary coil L22 of the transformer T and applied to both ends of the lamp LP has positive and negative polarities. Have. The voltage applied to the lamp LP is a value obtained by adding (subtracting) the voltages generated in the first secondary coil L21 and the second secondary coil L22, respectively. For this reason, if it is applied to the same lamp LP as the voltage generated by the number of turns of the first secondary coil L21 of the above-described embodiment, the number of turns of the first secondary coil L21 is set in this embodiment. The second secondary coil L22 having the same number of turns as the half may be used.

  By using the electromagnetic device of the present invention as the primary coil L1 and the first and second secondary coils L21 and L22 constituting the transformer T that generates a high voltage of such a lighting circuit, space saving and cost reduction are achieved. It can contribute to improvement.

  The present invention is not limited to the above-described embodiment. For example, a plurality of magnet wires may have a single structure by sharing their respective coatings.

Sectional drawing for demonstrating one Embodiment regarding the electromagnetic device of this invention. Sectional drawing of the principal part of FIG. The perspective view of the principal part of FIG. 3 is a perspective view of the main part. The perspective view of the principal part of FIG. Sectional drawing of FIG. The perspective view of the principal part of FIG. The equivalent circuit diagram of FIG. The circuit diagram for demonstrating the example which applied the electromagnetic device demonstrated in FIGS. 1-8 to the lighting device of the high pressure discharge lamp. Sectional drawing for demonstrating other embodiment regarding the electromagnetic device of this invention. (A) is a perspective view of the principal part of FIG. 10, (b) is a side view of (a). FIG. 11 is an equivalent circuit diagram of FIG. 10. The circuit diagram for demonstrating the example which applied the electromagnetic device demonstrated in FIGS. 10-12 to the lighting device of the high pressure discharge lamp.

Explanation of symbols

11 Ferrite core 12, 121-123, 12A, 12B Magnet wire 13, 13A Support ring 132, 155, 164 Inclined part 14, 141, 142 Terminal 15, 16 Bobbin 152-154 鍔 157, 165 Notch 1412 Valley 17 Case Body 171 Groove 18
L1 Primary coil L2 Secondary coil L21 First secondary coil L22 Second secondary coil L2a First layer L2b Second layer L2c Third layer

Claims (7)

Magnetic material,
On the side surface of the magnetic body, a secondary coil for generating a high voltage in which a magnet wire having a circular cross section is folded over a plurality of layers, and
An insulator for insulation between the high voltage and the low voltage before and after folding of the secondary coil itself;
A primary coil wound at a position facing the side surface of the magnetic body,
The electromagnetic apparatus according to claim 1, wherein a plurality of the magnet wires are connected in parallel to the side surface of the magnetic body. Magnetic material,
On the side surface of the magnetic body, a secondary coil for generating a high voltage in which magnet wires are folded back and forth symmetrically in multiple layers,
An insulator for insulation between the high voltage and the low voltage before and after folding of the secondary coil itself;
A primary coil wound at a position facing the side surface of the magnetic body,
The electromagnetic apparatus according to claim 1, wherein a plurality of the magnet wires are connected in parallel to the side surface of the magnetic body.   The electromagnetic device according to claim 1, wherein a plurality of the magnet wires are arranged in parallel at an angle with respect to the side surface of the magnetic body.   The electromagnetic device according to claim 1, wherein a winding start and a winding end of the secondary coil are separated from each other.   The electromagnetic device according to any one of claims 1 to 4, wherein an insulator is interposed between a high pressure and a low pressure before and after the plurality of layers of the magnet wires are folded back.   The insulator between the first layer and the second layer of the plurality of layers of the magnet wire is provided with a hook in which a hook having a height higher than the height of the primary coil is integrally formed on the winding start side of the primary coil. The electromagnetic device according to claim 1, wherein the electromagnetic device is a bobbin.   The electromagnetic device according to claim 1, wherein the primary coil and the secondary coil are arranged in a positional relationship that does not overlap the magnetic body.

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