CN1497621A - Transformer, power supply switching device and manufacturing method of transformer - Google Patents
Transformer, power supply switching device and manufacturing method of transformer Download PDFInfo
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- CN1497621A CN1497621A CNA2003101005907A CN200310100590A CN1497621A CN 1497621 A CN1497621 A CN 1497621A CN A2003101005907 A CNA2003101005907 A CN A2003101005907A CN 200310100590 A CN200310100590 A CN 200310100590A CN 1497621 A CN1497621 A CN 1497621A
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Abstract
To suppress a howling of a transformer which is used for a switching power unit while securing reliability. A cylindrical cutoff member 50 is inserted into an axial hole 24 of a bobbin 20 around which a winding wire 10 is wound. A middle foot 34 of a ferrite core 30 and a middle foot 44 of a ferrite core 40 are inserted into the cylindrical cutoff member 50. A gap G between the middle foot 34 and the middle foot 44 is filled with adhesives 60. The cutoff member 50 cuts off the periphery of the gap G and the bobbin 20, and the adhesives 60 stuck out of the gap G are not stuck on the bobbin 20. Howling is suppressed by the adhesives 60, and the cutoff member 50 prevents a stress caused by heating from being loaded to the ferrite core 30 and the ferrite core 40.
Description
Technical field
The present invention relates to the manufacture method of converter, Switching power device and converter.
Background technology
Figure 10 is the cutaway view of one of the converter (hereinafter referred to as transformer) of expression prior art example.
In the prior art, usually, be assembled into the switching transformer of Switching power device, its switching frequency designs to such an extent that be higher than sense of hearing frequency band., when awaiting orders, become in the occasion etc. of underloading,, can suppress to consume electric power by reducing the switching frequency of Switching power device.Drive switching transformer if the switching frequency of Switching power device is reduced, then becoming the transformer that original high-frequency drive is used comes work with for example low frequency of audible frequencies degree, can hear buzz sometimes.
So treat the buzz that can hear that takes place from switching transformer as the noise in the various e-machines.
Switching transformer as shown in Figure 10, the bobbin 4 of being reeled by one group of FERRITE CORE 1,2 and coil 5 constitutes.Mesopodium 1a, the 2a of each FERRITE CORE 1,2 are across gap 3 in opposite directions.
Noise is in opposite directions the mesopodium 1a of FERRITE CORE 1 in the axis hole 4a of bobbin 4 mainly, and 3 places, gap between the mesopodium 2a of FERRITE CORE 2 take place.Gap 3 is provided with in order suitably to adjust closed flux in coil 5.
As a countermeasure that is used for suppressing noise, handlebar FERRITE CORE 1,2 and the bobbin 4 that is wound with coil 5 are immersed in the coating, make it be impregnated with coating, with the method in paint fill gap 3.In addition, another countermeasure as suppressing noise has coating adhesive 6 on SMIS pin 1a, the 2a of FERRITE CORE 1,2, makes the bonding in opposite directions method of mesopodium 1a, 2a.
, in the occasion of flooding coating in order to prevent noise, the insufficient immersion of coating sometimes, it is incomplete that effect becomes.
On the other hand, in the mesopodium 1a that makes FERRITE CORE 1,2, method that 2a is bonded to each other, exist following problem.
If make the mesopodium 2a of the mesopodium 1a of FERRITE CORE 1 and FERRITE CORE 2 close in the axis hole 4a of bobbin 4, then bonding agent 6 is extruded, and the bonding agent of extruding 6 flows into the gap of bobbins 4 and FERRITE CORE 1,2.Thus, when bonding agent 6 solidified, FERRITE CORE 1,2 and bobbin 4 were integrated.
If FERRITE CORE 1,2 and bobbin 4 are integrated like this, then when heating,, be added on the FERRITE CORE 1,2 owing to its poor stress because FERRITE CORE 1,2 is different with the thermal coefficient of expansion of bobbin 4.If for example bobbin 4 is shown in the arrow A of Figure 10, with respect to the axial expansion of bobbin 4, FERRITE CORE 1,2 is little to the axial expansion of bobbin 4, then tensile force in the effect of bearing surface side respectively on mesopodium 1a, the 2a of FERRITE CORE 1,2.F crackle occurs on FERRITE CORE 1 or 2 because of this power, and then damaged sometimes.
Summary of the invention
The object of the present invention is to provide a kind of converter of not only having guaranteed reliability but also can having suppressed the generation of noise, the manufacture method of Switching power device and converter.
To achieve these goals, the converter according to the 1st viewpoint of the present invention is characterized in that, has: have at the bobbin (20) that axially forms the body (21) of axis hole (24); Be wound on the coil (10) on the body (21) of above-mentioned bobbin (20); The 1st magnetic core (30) that the core pin (34) of the axis hole (24) that inserts above-mentioned bobbin (20) is arranged; The 2nd magnetic core (40) with core pin (34) opposing part (44) in opposite directions of the 1st magnetic core (30) that inserts above-mentioned axis hole (24) is arranged; Be filled in the leading section of above-mentioned core pin (34) and the filler (60) of the joint portion between the above-mentioned opposing part (44); Cut off above-mentioned filler of filling (60) to the path of above-mentioned bobbin (20) be clipped in shut-off member (50) between above-mentioned joint portion and the above-mentioned bobbin (20).
By adopting this formation, even then because when driving with low frequency, the joint portion between the leading section of the leading section of the core pin of the 1st magnetic core and the opposing part of the 2nd magnetic core is filled agent and fills, so can suppress the generation of the buzz that can hear.In addition,,,, also can prevent the 1st magnetic core or the 2nd magnetic core breakage, crack even temperature rises so can prevent the integrated of bobbin and the 1st magnetic core and the 2nd magnetic core because the partition part cuts off the path between filler and the bobbin.
Moreover, between the leading section of the core pin (34) of above-mentioned opposing part (44) and above-mentioned the 1st magnetic core (30), both fixed gaps (G) being set, above-mentioned filler (60) also can be filled above-mentioned gap (G).
In addition, above-mentioned filler also can be a bonding agent (60).
In addition, the above-mentioned opposing part (44) that also can make above-mentioned the 2nd magnetic core (40) is convex, in its axis hole (24) in above-mentioned bobbin (20) in opposite directions in the leading section of above-mentioned core pin (34).
In addition, also can make above-mentioned shut-off member (50) become tubular, insert in the axis hole (24) of above-mentioned bobbin (20).
In addition, also can make above-mentioned shut-off member (50) become film like, cover the joint portion between the opposing part (44) of the leading section of the core pin (34) be filled in above-mentioned the 1st magnetic core (30) and above-mentioned the 2nd magnetic core (40) above-mentioned filler (60) around.
To achieve these goals, the Switching power device according to the 2nd viewpoint of the present invention is characterized in that, has: carry out switching device (83) between on-state, the off-state based on control signal; Converter described in the technical scheme 1 (70), wherein, when above-mentioned switching device (83) on-state, the flow through primary winding (10a) of the switch current that is derived from power supply and the above-mentioned body (21) that induction coil (10b) is wound on above-mentioned bobbin (20), flow to the primary winding (10a) of above-mentioned converter (70) and, apply electrical power to the efferent (85,86) of load by switch current from the stored energy of above-mentioned induction coil (10b) input; Generate the connection of setting above-mentioned switching device (83), the control part of the above-mentioned control signal in the moment of disconnection (100).
To achieve these goals, manufacture method according to the converter of 3 viewpoints of the present invention, it is characterized in that, comprise following processing: the body (21) that forms axis hole (24) in the axial direction is wound with in this axis hole (24) of bobbin (20) of coil (10), the processing of inserting the shut-off member (50) of tubular; At the leading section of this core pin (34) of the 1st magnetic core (30) of the core pin (34) that protrusion is arranged or have and a certain side of this opposing part of the 2nd magnetic core (40) of the opposing part of usefulness (44) or the processing that two sides go up coating fillers (60) in opposite directions of the leading section of above-mentioned core pin (34); Cut off the path between above-mentioned filler (60) and the above-mentioned bobbin (20) so that stop above-mentioned filler (60) adhering to shut-off member (50) to above-mentioned bobbin (20), the above-mentioned core pin (34) of above-mentioned the 1st magnetic core (30) is inserted among the above-mentioned shut-off member (50) of above-mentioned axis hole (24), the leading section that makes this core pin (34) is in opposite directions in the processing of the opposing part (44) of above-mentioned the 2nd magnetic core (40).
Moreover above-mentioned filler is bonding agent (60), also can be further the leading section that makes above-mentioned core pin (34) and this opposing part (44) in opposite directions after, implement the processing that above-mentioned bonding agent (60) is solidified.
Description of drawings
Fig. 1 is the pie graph of the transformer of expression embodiments of the invention.
Fig. 2 is the cutaway view of one of bobbin in the presentation graphs 1 example.
Fig. 3 is the front view of the FERRITE CORE in the presentation graphs 1.
Fig. 4 is the figure of the relation of expression FERRITE CORE and shut-off member.
Fig. 5 is the Switching power manipulated or operated apparatus of expression with transformer.
Fig. 6 be the expression FERRITE CORE variation (one of) figure.
Fig. 7 is the figure of the variation (two) of expression FERRITE CORE.
Fig. 8 is the figure of the variation (three) of expression FERRITE CORE.
Fig. 9 is the figure of the variation (four) of expression FERRITE CORE.
Figure 10 is the cutaway view of the transformer of expression prior art.
Embodiment
According to the present invention, can guarantee that the reliability of converter can suppress the generation of noise again.
Fig. 1 is the pie graph of the converter (hereinafter referred to as transformer) of expression embodiments of the invention.Fig. 2 is the cutaway view of one of bobbin 20 in the presentation graphs 1 example.Fig. 3 is the front view of the FERRITE CORE 30 in the presentation graphs 1.
Transformer shown in Fig. 1 has coil 10, bobbin 20, FERRITE CORE 30, FERRITE CORE 40 and shut-off member 50.This transformer group is for example packed into, and the Switching power device uses.FERRITE CORE 30 is bonding by bonding agent 60 with FERRITE CORE 40.
Bobbin 20 is formed by phenolic resins etc., is made of body 21, the flange part 22 and the flange part 23 that are disposed at the two ends of body 21.The external diameter of flange part 22 and flange part 23 is greater than the external diameter of body 21.On the periphery of body 21, do not reeling necessary group numerical example as three groups of coils 10 from the external diameter of flange part 22,23 with leaning out.
The group number of coil 10 is for example three groups.The body 21 of bobbin 20 axially on, form the axis hole 24 that connects flange part 22,23, body 21 becomes tubular.In the outside of flange part 23, be provided with a plurality of pins 25.Pin 25 keeps and being connected of the coil 10 that is wound on body 21 via not shown conductive member.
FERRITE CORE 30 usefulness ferrites form, and as shown in Figure 3, have support 31, the outer foot 32 of the flat column that protrudes from support 31, the outer foot 33 of the flat column that protrudes from support 31, and the columned SMIS pin 34 that protrudes from support 31.SMIS pin 34 is configured between outer foot 32 and the outer foot 33. Outer foot 32,33 and SMIS pin 34 in the same direction, FERRITE CORE 30 becomes " E " word shape.The equal in length of the length of outer foot 32 and outer foot 33, the length of SMIS pin 34 is than outer foot 32,33 weak points.
FERRITE CORE 40 is formations same with FERRITE CORE 30, form with ferrite, have support 41, the outer foot 42 of the flat column that protrudes from support 41, the outer foot 43 of the flat column that protrudes from support 41, and the columned SMIS pin 44 that protrudes from support 41.
Shut-off member 50 is that the path that cuts off between bonding agent 60 and the bobbin 20 is used, with for example plastics formation of tubular.The thickness of shut-off member 50 is arbitrarily, also can be made of polyester film of for example tubular etc.
Shut-off member 50 is assembled into the axis hole 24 of bobbin 20.The SMIS pin 34 of FERRITE CORE 30 and the SMIS pin 44 of FERRITE CORE 40 are inserted in inside at the tubular of shut-off member 50, and these fore-end across clearance G in opposite directions.The outer foot 32,33 of FERRITE CORE 30 and the outer foot of FERRITE CORE 40 42,43 be butt respectively.Filling bonding agent 60 in the clearance G between the SMIS pin 43 of the SMIS pin 34 of in opposite directions FERRITE CORE 30 and FERRITE CORE 40.Bonding agent 60 is made of for example epoxy resin.Even bonding agent 60 is extruded from clearance G, also be attached to shut-off member 50 and be cut off.
Next, the manufacture method of the transformer of Fig. 1 is described with Fig. 1 and Fig. 4.
Prepare bobbin 20 and shut-off member 50 that coil 10 is reeled, shut-off member 50 is inserted and is accommodated in the axis hole 24 of bobbin 20.
After shut-off member 50 is accommodated in bobbin 20, bonding agent 60 is coated fully the front end of the SMIS pin 44 of the SMIS pin 34 of FERRITE CORE 30 or FERRITE CORE 40.In addition, also coating adhesive 60 in the outer foot 42,43 of the outer foot 32,33 of FERRITE CORE 30 or FERRITE CORE 40.
Then, the SMIS pin 34 of FERRITE CORE 30 and the SMIS pin 44 of FERRITE CORE 40 are inserted the axis hole 24 of the bobbin 20 of taking in shut-off member 50 from the both sides of axis hole 24, as shown in Figure 4, make the fore-end and in opposite directions the fore-end butt of outer foot 42,43 of FERRITE CORE 40 with it of the outer foot 32,33 of FERRITE CORE 30.By making outer foot 32,33 and 42,43 butts, than producing clearance G between short SMIS pin 34 of these outer foots 32,33,42,43 and the SMIS pin 44.Clearance G becomes the state that is filled with bonding agent 60.
The bonding agent of extruding from clearance G 60 cuts off the adhering to of bobbin 20 by shut-off member 50, thereby is not attached to bobbin 20.Under this state, bonding agent 60 is solidified.Before and after bonding agent 60 solidifies, FERRITE CORE 30 is fixed in the flange part 22 of bobbin 20.Here, flange part 22 can still use adhesive securement with FERRITE CORE 30, also can fix with screw etc.
The transformer of Fig. 1 is assembled into the Switching power device shown in for example following Fig. 5.
Fig. 5 is the Switching power manipulated or operated apparatus of expression with transformer.
This Switching power device is a power factor correction circuit, and the transformer shown in Fig. 1 uses as switching transformer 70.The Switching power device of Fig. 5 is except having switching transformer 70, also have the full-wave rectifying circuit 82 that is connected to AC power 81, N channel-style MOS transistor (hereinafter referred to as NMOS) 83 as switching device, resistor 84, diode 85, capacitor 86, voltage grading resistor 87,88, voltage grading resistor 89,90, resistor 91, and control circuit 100.
Switching transformer 70 is coil 10a and as the secondary coil 10b and the tertiary coil 10c of induction coil once, and each coil 10a～10c is via FERRITE CORE 30, FERRITE CORE 40 electromagnetic combination.That is, the flux of coil 10a～10c is closed mutually via FERRITE CORE 30 and FERRITE CORE 40.
An end that on the positive pole of full-wave rectifying circuit 82, is connecting the primary winding 10a of switching transformer 70.The drain electrode that is connecting NMOS 83 on the other end of primary winding 10a is connecting an end of resistor 84 on the electrode of the source of NMOS 83.The other end of resistor 84 is connected to the negative pole of full-wave rectifying circuit 82, the minus earth of full-wave rectifying circuit 82.
On the end of the secondary coil 10b of switching transformer 70, connecting the anode of diode 85.The negative electrode of diode 85 is connected to a side's of lead-out terminal OUT1 and capacitor 86 electrode.Capacitor 86 the opposing party's electrode is connected to the other end of lead-out terminal OUT2 and secondary coil 10b.
Voltage grading resistor 87,88 is connected in series between the positive pole and negative pole of full-wave rectifying circuit 82.Voltage grading resistor 89,90 is connected in series between lead-out terminal OUT1 and the OUT2.
The end ground connection of the tertiary coil 10c of switching transformer 70, the other end of tertiary coil 10c is connected to an end of resistor 91.
Voltage grading resistor 87,88 generates the voltage signal of the voltage that expression imported from full-wave rectifying circuit 82, and the tie point of voltage grading resistor 87,88 is connected to control circuit 100.Voltage grading resistor 89,90 generates the voltage signal of expression output voltage, and the tie point of voltage grading resistor 89,90 is connected to control circuit 100.
Resistor 84 generates the flow through voltage signal of switch current of primary winding 10a and NMOS 83 of expression, and the source electrode of NMOS 83 and the tie point of resistor 84 are connected to control circuit 100.
Resistor 91 generates the voltage signal of the exergonic situation of recurrence among the tertiary coil 10c that represents switching transformer 70, and the other end of resistor 91 is connected to control circuit 100.
Control circuit 100 is based on each given voltage signal, generates the circuit of the control signal of the switching of controlling NMOS 83, and the lead-out terminal of control circuit 100 is connected to the gate electrode of NMOS 83.
Next, the action of the Switching power device of key diagram 5 and switching transformer 87.
Thereby the alternating voltage that full-wave rectifying circuit 82 rectification AC powers 81 take place is transformed into pulsating voltage with it.Pulsating voltage loads on primary winding 10a, NMOS 83 and the resistor 84 of transformer 70.NMOS 83 is in the conducting when control circuit 100 gives gate electrode of the control signal of high level (hereinafter referred to as " H ").The NMOS 83 of conducting flows through switch current in primary winding 10a and resistor 84.By flow through switch current in primary winding 10a, energy is stored.Switch current increases in time.The voltage signal that resistor 84 generates corresponding to switch current gives control circuit 100.In control circuit 100, when the voltage signal that is given from resistor 84 reaches fiducial value, make control signal carry out the transition to low level (hereinafter referred to as " L ").Whereby, NMOS 83 disconnects.
If NMOS 83 disconnects, then according to the recurrence energy that is taken place, capacitor 86 is recharged electric current by diode 85.Voltage grading resistor 89,90 gives control circuit 100 voltage signal of expression output voltage.
Resistor 84 is giving control circuit 100 corresponding to the voltage signal that returns energy.Control circuit 100 is based on detecting the exergonic situation of the recurrence that takes place the tertiary coil 10c from resistor 91 given voltage signals, and the control signal that gives NMOS 83 carries out the transition to " H " once more.Whereby, NMOS 83 connects.As mentioned above, NMOS 83 switching repeatedly, charging voltage is charged to capacitor.This charging voltage becomes output voltage.
When here, the voltage signal of the increase and decrease of the timing that disconnects of NMOS 83 switch current that to be expression generated by resistor 84 becomes fiducial value.Control circuit 100 makes this fiducial value and is directly proportional from 87,88 voltage signals that give control circuit 100 of voltage grading resistor.That is, fiducial value is directly proportional with the input voltage of being imported from full-wave rectifying circuit 82.Thus, NMOS83 disconnects during the voltage that voltage signal becomes with input voltage is directly proportional of current value of expression switch current.Whereby, adjust the timing that NMOS 83 disconnects, the switch current that flows through primary winding 10a is controlled.
In addition, control circuit 100 settings become constant so that make from voltage grading resistor 89,90 voltage signals that given to the proportionality coefficient of the input voltage of fiducial value.And then control circuit 100 is in order to realize low power consumption, has the function that fiducial value is changed in the low occasion of input voltage or the light occasion of load.In this occasion, control circuit 100 lengthening switch currents flow through primary winding 10a during, reduce the store energy amount of primary winding 10a.That is, reduce the switching frequency of NMOS83, for example make NMOS 83 switchings with the frequency that can hear.
Even the switching frequency of NMOS 83 becomes the frequency that can hear, in the FERRITE CORE 30 and FERRITE CORE 40 in switching transformer 70, clearance G between the SMIS pin 34,44 is also filled by bonding agent 60, because the fore-end of the fore-end of the SMIS pin 34 of FERRITE CORE 30 and the SMIS pin 44 of FERRITE CORE 40 is by bonding, so being suppressed of the buzz that can hear of low frequency.
On the other hand, because of from the heat of outside or be driven the self-heating that causes, the temperature of switching transformer 70 rises.Same in the occasion that temperature has risen, extrude from clearance G even filling the bonding agent 60 of the clearance G between the SMIS pin 44 of the SMIS pin 34 of FERRITE CORE 30 and FERRITE CORE 40, and be attached to shut-off member 50, also be not attached to bobbin 20.Therefore, because bonding agent 60 does not make FERRITE CORE 30 integrated with FERRITE CORE 40 and bobbin 20, so even bobbin 20 expands, for example on the SMIS pin 34 of FERRITE CORE 30 not along the directive effect tensile force of clearance G, also can prevent FERRITE CORE 30 damaged or its on crackle appears.
As mentioned above, in the transformer of present embodiment, even the frequency drives hearing also can suppress the generation as the buzz that can hear of noise, even and bonding agent 60 extrudes from clearance G, the adhering to of 60 pairs of bobbins 20 of bonding agent of extruding also be cut off member 50 and cut off.Thereby bobbin 20 and FERRITE CORE 30,40 can prevent the breakage of the FERRITE CORE 30 that heat causes etc. not by integrated.
Moreover the present invention is not limited to the foregoing description, and all distortion are possible.As its variation, as described below.
(1) FERRITE CORE 30 and FERRITE CORE 40 are respectively " E " font, and SMIS pin 34 and SMIS pin 44 are cylindric.Though the combination of this FERRITE CORE 30 and FERRITE CORE 40 is called EER formula magnetic core, FERRITE CORE 30 and FERRITE CORE 40 are not limited to this shape.The variation of FERRITE CORE 30 and FERRITE CORE 40 is described here.
Fig. 6 be the expression FERRITE CORE variation (one of) figure.Fig. 7 is the figure of the variation (two) of expression FERRITE CORE.Fig. 8 is the figure of the variation (three) of expression FERRITE CORE.Fig. 9 is the figure of the variation (four) of expression FERRITE CORE.
Also can replace FERRITE CORE 30 and FERRITE CORE 40 with the FERRITE CORE shown in two Fig. 6 101.The SMIS pin 101a of FERRITE CORE 101 is not cylindric, but flat column, other parts and FERRITE CORE 30 or FERRITE CORE 40 are same.Two FERRITE CORE 101 are called EE formula magnetic core.
Also can replace FERRITE CORE 30 and FERRITE CORE 40 with FERRITE CORE 102 shown in Fig. 7 and FERRITE CORE 103.Though FERRITE CORE 102 is similarly " E " font with FERRITE CORE 30 or FERRITE CORE 101, FERRITE CORE 103 becomes ' I ' font.The middle body of FERRITE CORE 103 becomes in opposite directions in the opposing part of the SMIS pin 102a of FERRITE CORE 10.These FERRITE CORE are called EI formula magnetic core for 102,103 1 groups.
Also can replace FERRITE CORE 30 and FERRITE CORE 40 with the FERRITE CORE 104 of two Fig. 8.The external diameter of the SMIS pin 104a of FERRITE CORE 104 is called PQ formula magnetic core greater than the width of the support 104b it near.
Also can replace FERRITE CORE 30 and FERRITE CORE 40 with the FERRITE CORE 105 of two Fig. 9.The external diameter of the outer 105a of foot of FERRITE CORE 105 and its support 105b of supporting are greater than columned SMIS pin 105c.This FERRITE CORE is called RM formula magnetic core.
(2) though be provided with clearance G at 34,44 on the SMIS pin of FERRITE CORE 30 and FERRITE CORE 40 in the above-described embodiments, the transformer of G very close to each other when the present invention can apply to assemble can obtain the effect same with the foregoing description.
(3) though in the above-described embodiments, the example that transformer uses as the switching transformer 70 of power factor correction circuit is shown,,, also receives same effect in the occasion that drives with low frequency even in the occasion that is assembled into other Switching power devices.
(4) as the filler of filling clearance G, be not limited to the bonding agent 60 of epoxy resin, also can use other bonding agents.In addition, noggin piece can not be a bonding agent also.Even be not bonding agent, it is contemplated that by with the adhering to of bobbin 20, make the occasion of applied stress on the FERRITE CORE 30,40, because shut-off member 50 hinders fillers to the adhering to of bobbin 20, so receive the effect same with the foregoing description.And then, if make filler,, also can predict to not influence of goods, so the operation raising even then owing to unnecessary filler in the operation is attached in the table of shut-off member 50 with the bonding member of difficulties such as teflon.
Claims (9)
1. a converter is characterized in that, has:
Have at the bobbin (20) that axially forms the body (21) of axis hole (24);
Be wound on the coil (10) on the body (21) of above-mentioned bobbin (20);
The 1st magnetic core (30) that the core pin (34) of the axis hole (24) that inserts above-mentioned bobbin (20) is arranged;
Have in opposite directions in the 2nd magnetic core (40) of the opposing part (44) of the core pin (34) of the 1st magnetic core (30) that inserts above-mentioned axis hole (24);
Be filled in the leading section of above-mentioned core pin (34) and the filler (60) of the joint portion between the above-mentioned opposing part (44);
Cut off above-mentioned filler of filling (60) to the path of above-mentioned bobbin (20) be clipped in shut-off member (50) between above-mentioned joint portion and the above-mentioned bobbin (20).
2. the converter described in claim 1 is characterized in that, between the leading section of the core pin (34) of above-mentioned opposing part (44) and above-mentioned the 1st magnetic core (30) both fixed gaps (G) is set,
Above-mentioned filler (60) is filled above-mentioned gap (G).
3. the converter described in claim 1 is characterized in that, above-mentioned filler is bonding agent (60).
4. the converter described in claim 1 is characterized in that, the above-mentioned opposing part (44) of above-mentioned the 2nd magnetic core (40) is a convex, in its axis hole (24) in above-mentioned bobbin (20) in opposite directions in the leading section of above-mentioned core pin (34).
5. the converter described in claim 1 is characterized in that, above-mentioned shut-off member (50) becomes tubular, inserts in the axis hole (24) of above-mentioned bobbin (20).
6. the converter described in claim 1, it is characterized in that, above-mentioned shut-off member (50) becomes film like, cover the joint portion between the opposing part (44) of the leading section of the core pin (34) be filled in above-mentioned the 1st magnetic core (30) and above-mentioned the 2nd magnetic core (40) above-mentioned filler (60) around.
7. a Switching power device is characterized in that, has:
Carry out switching device (83) between on-state, the off-state based on control signal;
Converter described in the claim 1 (70), wherein, the primary winding (10a) of the switch current that is derived from power supply of when above-mentioned switching device (83) on-state, flowing through and the above-mentioned body (21) that induction coil (10b) is wound on above-mentioned bobbin (20);
Flow to the primary winding (10a) of above-mentioned converter (70) and import stored energy by switch current, and apply electrical power to the efferent (85,86) of load from above-mentioned induction coil (10b);
Generate the above-mentioned switching device of setting (83) and connect the control part of the above-mentioned control signal in the moment of disconnection (100).
8. the manufacture method of a converter is characterized in that, comprises following processing:
Form in the axial direction in this axis hole (24) of the bobbin (20) that is wound with coil (10) on the body (21) of axis hole (24), insert the processing of the shut-off member (50) of tubular;
At the leading section of this core pin (34) of the 1st magnetic core (30) of the core pin (34) that protrusion is arranged, perhaps have and a certain side of this opposing part of the 2nd magnetic core (40) of the opposing part of usefulness (44) or the processing that two sides go up coating fillers (60) in opposite directions of the leading section of above-mentioned core pin (34);
Cut off the path between above-mentioned filler (60) and the above-mentioned bobbin (20) so that stop above-mentioned filler (60) adhering to shut-off member (50) to above-mentioned bobbin (20), the above-mentioned core pin (34) of above-mentioned the 1st magnetic core (30) insert is inserted among the above-mentioned shut-off member (50) of above-mentioned axis hole (24), the leading section that makes this core pin (34) is in opposite directions in the processing of the opposing part (44) of above-mentioned the 2nd magnetic core (40).
9. the manufacture method of the converter described in claim 8 is characterized in that,
Above-mentioned filler is bonding agent (60),
The leading section that makes above-mentioned core pin (34) and this opposing part (44) in opposite directions after, further implement the processing that above-mentioned bonding agent (60) is solidified.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002305004A JP2004140261A (en) | 2002-10-18 | 2002-10-18 | Transformer, switching power unit and manufacturing method of transformer |
| JP305004/2002 | 2002-10-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1497621A true CN1497621A (en) | 2004-05-19 |
| CN1300811C CN1300811C (en) | 2007-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101005907A Expired - Fee Related CN1300811C (en) | 2002-10-18 | 2003-10-20 | Transformer, power supply switching device and manufacturing method of transformer |
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| Country | Link |
|---|---|
| JP (1) | JP2004140261A (en) |
| CN (1) | CN1300811C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034592A (en) * | 2009-09-30 | 2011-04-27 | 雅达电子国际有限公司 | Low cost charger transformer |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008007021A1 (en) * | 2008-01-31 | 2009-08-06 | Osram Gesellschaft mit beschränkter Haftung | A throttle and method of manufacturing a reactor core unit for a throttle |
| JP2010165857A (en) * | 2009-01-15 | 2010-07-29 | Canon Inc | Transformer, switching power supply device, and dc-dc converter device |
| JP5462216B2 (en) * | 2011-05-13 | 2014-04-02 | 新東ホールディングス株式会社 | Power converter |
| JP2013004887A (en) * | 2011-06-21 | 2013-01-07 | Minebea Co Ltd | Coil component |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2509694Y (en) * | 2001-04-27 | 2002-09-04 | 台达电子工业股份有限公司 | Thin transformer |
-
2002
- 2002-10-18 JP JP2002305004A patent/JP2004140261A/en active Pending
-
2003
- 2003-10-20 CN CNB2003101005907A patent/CN1300811C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034592A (en) * | 2009-09-30 | 2011-04-27 | 雅达电子国际有限公司 | Low cost charger transformer |
| CN102034592B (en) * | 2009-09-30 | 2016-06-15 | 雅达电子国际有限公司 | low cost charger transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004140261A (en) | 2004-05-13 |
| CN1300811C (en) | 2007-02-14 |
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