JPS5947722A - Leakage transformer - Google Patents

Abstract

PURPOSE:To equalize magnetic flux passing windings and reduce fluctuation of voltage between sections by providing a magnetic flux leakage part in such a manner that the magnetic flux leakage path core is protruded toward the yoke core from leg core. CONSTITUTION:A path core 11 is added in place of existing cap, this path core 11 is engagingly inserted between a leg cores 5a and 5b, width of gaps 2, 4 and number of turns of primary an secondary windings are adjusted and the primary (excitation) inductance is equalized to the leakage inductance, namely to a coupling constant. When such path core is added, leakage magnetic flux almost passes this path core and accordingly fluctuation of voltage between sections can be reduced. For example, when windings Pdc and Pce are compared, an inductance value becomes about -6.5% and fluctuation can be reduced remarkably.

Description

[Detailed description of the invention] Honkomei, I, Lexi 1-in winder J 7. 4 of the mill baluns between each unit of lI N (< L/
/, - Concerning Reno Noge 1 ~ Nonce (Jru. 1 Conventionally, leakage!・Lance C I don't know if it has the configuration shown in Figure 1. (No. 2 Leakage 1-'')
For example, the ballast installed in the discharge lamp lighting device or the tit i' bal/7[-lance()(-1゛1
A high-frequency voltage is applied to the secondary winding, and this high-frequency voltage causes the secondary winding to generate an electric current.
1 F lft illusion is used. In Figure 1, at a3, i a, 31, and 11+ are in the form of -1 a, and are arranged in C facing each other with an interval of 1 N between ate1 of ini 1ir), and -( , 3./I is formed 1, sl, 1.-1-1 al a +f; J,
11) Middle blade 5B.

5 II! J This line 7-ji 1- constitutes the leg of the lance, - each primary W line 6 N]h+I, l'
)ei, Pdc.

1ace) J: and the secondary winding 7 are connected to the t-ction. ] A 1a, lb upper side Oa, 8 b, side side 9a.

9bJ3 and below] υ10a, 10b 1. t: leg ml
It constitutes a yoke for forming the main magnetic path.

By the way, this J: hum-//-jito-nonce di
37125 in the magnetic flux (Jl [shape] ala, lb)
a, 513 3 Tl 8a, E'+ b J
l and lower side 10 LI Ol+ f, key 17 tup 2, 3.
Since the leakage occurs in a relatively wide area centered around 4, the winding position - 4 I T straw [? The number of magnetic flux passing through the winding is different depending on the winding, so the number of turns is the same (t) winding f)
3 jl/、chowa J section (koyo-) C electric Jil
There was an inconvenience that there was wide variation.

The objective of the present invention is to solve the problem J in the conventional form of -LjIF
Considering t+j, a path-11 for magnetic flux leakage is established from leakage 1 to the lance.
(Based on idea 14, the purpose is to equalize the magnetic flux passing through W Ai!i! and to reduce the variation in electric j1 between one wire and one wire.)

The present invention has a leg portion with a magnetic flux leakage portion in the middle: ]j7, etc.
The primary winding and the secondary winding are wound in sections on both sides of this magnetic flux leakage part, and the 9th part of the primary winding and the secondary winding is connected to both ends of the leg core. The magnetic flux leakage section is a magnetic flux leakage path A from the leg section 17 to the MO1 direction G. It is characterized by being provided in a protruding manner.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows the configuration of a leakage transformer according to one embodiment of the present invention. J. The leakage 1->ance in Figure 2 is
Figure 1 Glue λ・j to the cage 1 to the lance, and set the gear V knob 3.
Instead, add 1 pass core 1111 and insert this pass core 11 between legs 1A 5aJ-5 and 5b. , 13 and the number of turns of the secondary winding to equalize the primary (excitation) inductance and leakage inductance and the coupling constant.

By adding this J, U(, Nibus 1) 7, most of the leakage m flux passes through this path: ] 77, so the variation of the electric current F' between each (7 counsions) becomes small. ,
Traditional! Comparing the winding PDC and PCE in Ume,
The h of the pce was 20% higher due to the leakage inductance, and the voltage was 12% lower and unbalanced.
In the present invention, J, Rudo, inductance 1lrj F approximately -6
, 5%/f, the variation can be significantly reduced.

FIG. 3 shows an example of a circuit for a lightning lamp lighting device to which the present invention is applied.

In the figure, a power source 30 includes an AC power source 31, and a rectifier circuit, such as a high frequency rectifier circuit 32, is connected to the AC power source 31. , and the other circuits are supplied with non-smooth direct current (rectified output) from this rectifier circuit 32. This rectified output terminal 1.11
A single line circuit of 11 inductor 33 and a, r solate tie 34 is connected between them, and a constant current inductor 3 is connected between them.
Via 5, a high frequency generator, for example a high frequency inverter 40, is connected at 1.7. 4113, Barista 3 (3,
-1 inch 37 and balance 1 to lance 38 constitute a noise prevention circuit.

This inverter 7IO uses a push cobble type inverter, which includes a pair of transistors 41, 4.2, bias resistors 43.4/4. Resonant 21 capacitor 4!5 and output 1 to lance/16 are connected to Natsu-C. And so, this output Lance/16 and L T * Invention Noriichi! )-citrans is used.

The inverter 40 connects the rectified output positive side terminal a to the midpoint of the primary winding 461 of the output I-lance 46 (7)
Write down 4 C names! J and b 1. Connect the base of C transistor 41 through 1/13 to Tbinose 1, and connect it to J:
The @f! Output output 0 side terminal 1 - transistor 41.
42 are connected to each other, and this transistor 41. /12] 1 noctor is connected to both ends of the primary winding 461 of the output i to the lance 46, and resonance occurs between the primary windings 4010 and 461.
and further connect the output 1 to the tertiary winding 1 of the lance 46.
) 46:3 is connected to the bases of the transistors 41 and 42.

1j, the primary volume 1 of the output 1 Herance 46! il
Between the midpoint C of 461 and both ends, there are intermediate taps (1
, e on the moon)C. Ignore these taps,
A high frequency rectifier circuit such as a diode lIB, I9h is connected to c through a current limiting lance 47, and this rectifier circuit is roughly connected to the capacitor 33 and gate 1.
A feedback circuit is formed by connecting 1 and connecting points of the Δ-domain 34.

t1: Output 1 - Secondary winding 46 of lance 46
2 and connect the discharge lamp 50 as a load. Note that this secondary winding 462 has a 1, -th tap that supplies current to the filament 1 to the electrodes of the electric lamp 50.

g).

Next, let's look at the effect of 9, which is structured as follows.

Now, when the AC power supply 31 is turned on, a high wave rectifier output is generated from the gold wave rectifier circuit 32, and this is converted to C through the inductor 35.
It is fed to the inverter 40. As a result, the rectified output of the inverter 40r is passed through the bias resistor /13.44 to the C transistor 4'142 in the form of a base current. 1b) and transistor 41. /'12
One of them turns on first due to a fragile ambiance, but
Now, current flows through the primary winding 461 of the only output transformer 4 [3] through the synsister 41 first. Therefore, in this state (-r inductance distribution of the primary wire 461 (h
An oscillating voltage is generated due to the rotation of the motor, and this generates an electromotive force in the tertiary line 463, which turns on the 1-transistor 42.
．． 42 will be turned on to AC. in this case,
Redyed A-do/I8. to the induced output of the primary winding 461 of the output 1 lance 46. A rectified output is generated through the rectifier circuit consisting of /I9, and this output is applied to the capacitor 33 as a feedback output. As a result, the condenser 33 is charged in a predetermined direction.

However, this T1 power supply 33 is discharged when the rectification output of the rectifier circuit 32 becomes equal to or less than a predetermined voltage of 2'r every half 4J cycle, that is, in this embodiment, the Uml power supply 33 is discharged. (gives electric power to the inverter 40.

As a result, the secondary winding 462 side of the output transformer 4 (3) of the -r/verter 40 (62 is
A frequency output will be generated, and this δ'111:'
, l t17/output by -6, the discharge lamp 37 is emitted with good luminous efficiency.

According to the present invention, the bus core is taken in A of the J, 7, and lance above, and the section winding is There is a small variation in the voltage of each section.
3. It is possible to improve the positive and negative balance of (Masono's induced output Shimotsuki).

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be appropriately modified and put into practice without changing the gist. For example, 137i
In this embodiment, two E-shaped cores (1a, 1t) and an I-shaped bus core 11 inserted between the cores (1) are used. For example, as shown in FIG. 4, two 1-shaped cores 21a are shown in parentheses.

211) and a cross shape 1122 with a path 1711 protruding from the medium heat part of the leg core 5 of type 1 to form a shape 11 that is almost the same as that of I-31 in the embodiment shown in FIG. 2. 1 nom is better. In this case, gap 2 for coupling constant adjustment
, 4 can be installed at any desired location on the yoke core, such as at the junction between the cross-shaped core and the (''-shaped core), at a portion other than the same portion of the winding of the leg core, and at any desired location on the yoke core. In this embodiment, the U-shaped core on one side and the path core on the same side can also be omitted.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the winding of a conventional leakage transformer cut at the upper surface of the core, Fig. 2 is a diagram of the winding of a leakage transformer according to an embodiment of the present invention, cut at the soil surface of the core. FIG. 4 is a circuit diagram of a discharge lamp lighting device to which the leakage lance of the present invention is applied. FIG. 4 is a diagram in which the winding of a leakage transformer according to another embodiment of the present invention is cut across the top surface of the core. 1 (1a, 1b)... [shaped core, 5 (5a, 5b)... leg core, 11... Pasco 1a, 6... primary winding, 7... secondary winding line, 8a,
8b, 9a, '9b, IQa, 10b・Tl-ri] Core 46... Output Lance, 60... Discharge lamp. Patent applicant: Toshiba Electric Materials Co., Ltd. Agent: Attorney Tatsuo Ito Patent attorney: Tetsuya Ito

Claims (1)

[Claims] There is a magnetic flux leakage part in the middle, and a leg part with a magnetic flux leakage part on the right.
The next winding J3J and the secondary winding are connected to both ends of the leg part 217 through the outside of the primary winding and the secondary winding. lft-Ruru Rikuji 1
~ The magnetic flux leakage part in the lance is characterized by being made to protrude in the direction ( ) from the leg part of the bus core for intraoperative leakage.