KR101748023B1 - Constant voltage source - Google Patents

Constant voltage source Download PDF

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Publication number
KR101748023B1
KR101748023B1 KR1020150056533A KR20150056533A KR101748023B1 KR 101748023 B1 KR101748023 B1 KR 101748023B1 KR 1020150056533 A KR1020150056533 A KR 1020150056533A KR 20150056533 A KR20150056533 A KR 20150056533A KR 101748023 B1 KR101748023 B1 KR 101748023B1
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KR
South Korea
Prior art keywords
constant voltage
unit
power supply
current
voltage output
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KR1020150056533A
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Korean (ko)
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KR20160126142A (en
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최재혁
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엘에스산전 주식회사
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Priority to KR1020150056533A priority Critical patent/KR101748023B1/en
Publication of KR20160126142A publication Critical patent/KR20160126142A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/209—Heat transfer by conduction from internal heat source to heat radiating structure

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant voltage power supply device and an electronic contact device having the constant voltage power supply device, and more particularly, to a constant voltage power supply device with enhanced resistance against noise such as excessive surge, .
A constant voltage power supply apparatus according to an embodiment of the present invention includes a constant voltage supply unit for supplying a constant voltage signal, a first current limiting unit for limiting a current to an input power source applied to the constant voltage supply unit, A second current limiter for limiting the current to the input power source applied to the constant voltage output unit, and a second current limiter for smoothing the constant voltage power output from the constant voltage output unit, The constant voltage output unit may include a plurality of transistors connected in series.

Description

[0001] CONSTANT VOLTAGE SOURCE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant voltage power supply device and an electronic contact device having the constant voltage power supply device, and more particularly, to a constant voltage power supply device with enhanced resistance to noise such as excessive surge introduced from a power supply side, .

The constant voltage power supply is a power supply device for supplying a stable voltage regardless of an input power source, and is applied to various fields ranging from a power supply of a semiconductor manufacturing facility to a power supply of a cellular phone.

However, in the case of a constant voltage power supply apparatus having a configuration for generating and providing a real-time constant voltage signal by receiving power from the outside, when excessive noise such as surge is included in the input power supply, , And various problems such as malfunction of the equipment due to malfunction of the equipment or damage of the parts are caused.

For example, in the case of an electronic contact device, which is one of the devices constituting the factory automation system, if excessive surge or other noise is applied to the constant voltage power source constituting the power source of the electronic contact device, it affects other devices connected thereto, And may cause serious consequences such as generation of electric power or burnout of the electric motor connected to the output terminal.

Therefore, a new structure of a constant voltage power supply device with enhanced resistance to noise such as excessive surge included in the input power source is proposed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a constant voltage power supply apparatus having enhanced resistance to noise such as excessive surges introduced from a power supply side and an electronic contact apparatus having the constant voltage power supply apparatus.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a power supply apparatus including: a constant voltage supply unit for supplying a constant voltage signal; a first current limit unit for limiting a current to an input power source applied to the constant voltage supply unit; A second current limiter for limiting the current to the input power source applied to the constant voltage output unit, and a smoothing unit for smoothing the constant voltage power output from the constant voltage output unit The constant voltage output unit includes a plurality of transistors connected in series.

Here, the present invention may further include a heat dispersing unit connected in parallel with the constant voltage output unit to disperse heat generated from the constant voltage output unit, wherein the heat dispersing unit includes a plurality of resistance devices connected in parallel Lt; / RTI >

Further, the present invention may further include a noise removing unit for removing impulse noise of the input power source. In this case, the noise removing unit may be configured by a zener diode.

According to another aspect of the present invention, there is provided an electronic contact apparatus including a power source section, a contact section, and a driving section for opening and closing the contact section, wherein the power source section includes: a rectifying circuit section for receiving a DC power source to generate a DC power source; And a constant voltage power supply unit for generating a constant voltage signal by receiving the direct current power supplied from the constant voltage power supply unit, wherein the constant voltage power supply unit includes: a constant voltage supply unit for supplying a constant voltage signal from the input power supply; A second current limiting unit for limiting the current to the input power source applied to the constant voltage output unit, and a second current limiting unit for limiting the current to the constant voltage output unit, Smoothing the constant voltage power output from the constant voltage output unit Wherein the constant voltage output portion is constituted by a series connection of two or more transistors.

Here, the constant voltage power supply unit included in the electronic contact apparatus of the present invention may further include a heat dispersing unit connected in parallel with the constant voltage output unit to disperse heat generated from the constant voltage output unit, Or more of the resistance elements connected in parallel.

In addition, the constant voltage power supply unit may further include a noise removing unit for removing impulse noise of the input power source. In this case, the noise removing unit may be configured by a zener diode .

According to the present invention as described above, it is possible to provide a constant voltage power supply device having improved immunity against noise such as excessive surge included in the input power supply.

In addition, by configuring the constant voltage output portion by series connection of a plurality of transistors, normal voltage drive of the constant voltage power supply device can be performed even if some of the transistors are burned out, and serious problems such as stopping of the equipment due to power supply cutoff can be prevented And the like.

Fig. 1 is an explanatory view showing a configuration of a normal constant-voltage power supply device.
2 is an explanatory view showing a configuration of a constant voltage power supply device according to an embodiment of the present invention.
3 is an explanatory view showing a configuration of a constant voltage output unit of a constant voltage power supply device according to another embodiment of the present invention.
4 is an explanatory view showing a schematic configuration of an electromagnetic contact apparatus having a constant voltage power supply apparatus according to an embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

Fig. 1 is an explanatory view showing a configuration of a normal constant-voltage power supply device.

1, a conventional constant voltage power supply apparatus includes a constant voltage supply unit 110 for supplying a constant voltage signal from an input power supply VDD, a first power supply unit 110 for limiting a current to an input power supplied to the constant voltage supply unit 110, A constant voltage output unit 120 for outputting a constant voltage power using the constant voltage signal supplied from the current limiting unit 115 and the constant voltage supply unit 110, a current limiting unit for limiting the current to the input power supplied to the constant voltage output unit 120 And a smoothing unit 150 for smoothing the constant voltage power output from the second current limiting unit 130 and the constant voltage output unit 120. [

The constant voltage supply unit 110 may include a Zener diode ZD1 or the like and supplies a constant voltage signal having a constant voltage regardless of the input power supply voltage VDD.

The constant voltage output unit 120 may be constituted by a transistor Q1 or the like as shown in the figure. The constant voltage output unit 120 uses a constant voltage signal supplied from the constant voltage supply unit 110 as an input signal of the base, And outputs the result.

In this case, a first current limiting unit 115 for limiting the current of the input power supply VDD is applied to the constant voltage output unit 120 at the front end of the constant voltage supply unit 110, And a second current limiting unit 130 for limiting the current of the power supply.

The constant voltage signal output from the constant voltage output unit 120 is supplied to the load side connected to the output terminal through the smoothing of the smoothing unit 150 (VCC).

The heat dissipating unit 140 for dispersing the heat applied to the constant voltage output unit 120 and the noise removing unit 160 for removing the impulsive noise included in the input power source VDD may be additionally provided As shown in FIG.

However, in the case of such a conventional constant-voltage power supply, if the constant-voltage output unit 120 is burned out due to noise such as excessive surge included in the input power supply VDD, the normal function of the constant-voltage power supply unit is not possible The noise is transmitted to the output side (VCC) as well as a malfunction or malfunction of various load facilities connected to the output terminal can occur.

2 is an explanatory view showing a configuration of a constant voltage power supply device according to an embodiment of the present invention.

2, the constant voltage power supply according to an exemplary embodiment of the present invention includes a constant voltage supply unit 210, a first current limit unit 215, a constant voltage output unit 220, and a second current limit unit 230 235, a heat dispersing unit 240, a smoothing unit 250, a noise removing unit 260, and the like.

The constant voltage supply unit 210 may be a zener diode ZD1 or the like to perform a function of generating a constant voltage power. The Zener diode is a device having a characteristic that a current flows when a breakdown voltage higher than a certain value is applied in the reverse direction. In the case of FIG. 2, the base of the transistors Q1 and Q2 constituting the constant voltage output units 220 and 225 As a source voltage source for the < / RTI >

The first current limiting unit 215 limits the current applied to the zener diode ZD1 constituting the constant voltage supply unit 210 from the input power supply VDD and is connected to at least one of the resistance elements R1 and R2 Lt; / RTI > When the number of the resistance elements constituting the first current limiting section 215 is two or more, the configuration of the first current limiting section 215 may be possible through their series connection as shown in the figure.

The constant voltage output units 220 and 225 may be composed of a plurality of transistors Q1 and Q2 connected in series. The constant voltage signal output from the constant voltage supply unit 210 is used as an input signal of the base, And outputs power. In this process, due to the voltage drop between the base and the emitter, the output of a constant level of the constant voltage signal with respect to the constant voltage signal provided by the constant voltage supply unit 210 can be stably performed.

In this case, the constant voltage output units 220 and 225 are formed by series connection of a plurality of transistors Q1 and Q2, so that when excessive surge or the like is input from the input power supply VDD side, So that the transistors each have a load of 1 / N. In other words, in the case of a constant-voltage output unit constituted by a single transistor in the past, when the transistor is damaged by a surge or the like, not only the function of the entire constant-voltage power supply unit is seriously damaged, but also the load unit connected to the output terminal of the constant- There is a disadvantage in that the influence is exerted.

However, in the case of the constant-voltage power supply apparatus according to the embodiment of the present invention as shown in FIG. 2, even when an excessive surge is drawn from the input power supply side, surges are distributed to the plurality of transistors Q1 and Q2. It is possible to provide various advantages such as being able to perform normal operation of the entire constant voltage power supply unit if only at least one transistor among the plurality of transistors Q1 and Q2 can be normally operated as well as being N times safer than the constant voltage power supply unit have.

As a result, it is possible to provide a constant voltage power supply device with improved resistance against noise such as excessive surge, and it is possible to protect and securely operate the load equipment connected to the constant voltage power supply device through the constant voltage power supply device.

The second current limiting units 230 and 235 function to limit the current input to the collector ends of the transistors constituting the constant voltage output units 220 and 225 and may be constituted by a resistance element or the like. The second current limiting units 230 and 235 are not necessarily provided at the collector input terminals of the transistors constituting the constant voltage output units 220 and 225. The configuration of the second current limiting units 230 and 235 It is needless to say that appropriate adjustment to the resistance value of each resistance element may be necessary so that the total resistance value between them can be maintained at a certain level.

The heat dissipation unit 240 may be composed of a plurality of resistance elements R5 and R6 connected in parallel.

The heat dissipation unit 240 may be connected to the collector side input terminal of the first transistor Q1 and the emitter side output terminal of the last transistor Q2 of the constant voltage output units 220 and 225, Q1, and Q2), thereby enabling stable operation of the device.

The constant voltage power output through the constant voltage output units 220 and 225 is smoothed through the smoothing unit 250. The smoothing unit 250 may be constituted by a capacitor C1 having an appropriate capacitance and may be formed by bypassing and removing an AC component included in a direct current component output through the constant voltage output units 220 and 225 As shown in FIG. This allows the constant voltage power supply to supply a more stable constant voltage power supply.

The noise eliminator 260 functions to protect load devices connected to the output terminal VCC by absorbing and removing excess surge input from the input power supply VDD. As shown in the figure, the noise remover 260 may include a zener diode ZD2 or the like.

The constant voltage output units 220 and 225 are constituted by a plurality of (N) transistors connected in series, so that the surge voltage on the side of the input power supply VDD It can be confirmed that each transistor element can be dispersed in a 1 / N ratio. Thus, it is possible to provide a more stable and safe constant voltage power supply device.

3 is an explanatory view showing a configuration of a constant voltage output unit of a constant voltage power supply device according to another embodiment of the present invention.

Referring to FIG. 3, it can be seen that the constant voltage output units 310, 320, and 330 of the constant voltage power supply according to another embodiment of the present invention include three transistors Q1, Q2, and Q3. That is, although the constant voltage power supply device including the two transistors Q1 and Q2 has been described with reference to FIG. 2, the present invention is limited to the configuration in which the constant voltage output portion is formed by the two transistors Q1 and Q2 Fig. 3 is shown to illustrate that additional, three, or more transistors are possible.

3, current limiters 315, 325, and 335 may be provided at the collector-side inputs of the respective transistors. The current limiters 315, 325, R2, R3, and so on.

The current limiting units 315, 325, and 335 are not necessarily provided at the collector input terminals of the transistors constituting the constant voltage output units 310, 320, and 330. The current limiting units 315, The resistance value of each resistance element may need to be adjusted appropriately so that the total resistance value between them can be maintained at a certain level.

A parallel connection resistive element R4 (R4) is connected between the collector side input terminal of the first transistor Q1 constituting the constant voltage output sections 310, 320 and 330 and the emitter side output terminal of the last transistor Q3, , R5), and the like are the same as in the embodiment of Fig.

4 is an explanatory view showing a schematic configuration of an electromagnetic contact apparatus having a constant voltage power supply apparatus according to an embodiment of the present invention.

Referring to FIG. 4, an electronic contact apparatus having a constant voltage power source apparatus according to an embodiment of the present invention includes a rectifier circuit unit 410, a constant voltage power source unit 420, a discharge circuit unit 430, an electromagnet coil 440, (450), a pulse width modulator (460), and the like.

The rectifying circuit portion 410 performs a function of rectifying the input power to convert it into DC power.

The constant voltage power supply unit 420 may be configured by a constant voltage power supply unit having a constant voltage output unit as described with reference to FIGS. 2 and 3. The constant voltage power supply unit 420 receives the constant voltage power supply signal And provides the function of generating and supplying.

The discharge circuit unit 430 and the electromagnet coil 440 are connected in parallel to each other, and one terminal connected in parallel is connected to the output terminal of the constant voltage power supply unit 420.

The pulse width modulator 460 generates a pulse signal having a predetermined width as a switching signal. A grounding resistor R1 is connected to the gate of the transistor FET1 for detecting the current flowing through the output terminal of the pulse width modulating unit 460 and the electromagnet coil 440 to the switching unit 450, The electromagnet coil 440 and the other terminal of the discharge circuit part 430 are connected to the drain.

In the electronic contact apparatus having such a configuration, when power is supplied, the pulse width modulating unit 460 generates a pulse signal having a predetermined pulse width, and the generated pulse signal is supplied to a transistor (not shown) provided in the switching unit 450 FET1. Then, the transistor FET1 repeats the conduction state and the cutoff state in accordance with the pulse signal output from the pulse width modulation section 460. [ That is, when the transistor FET1 is in the conduction state, the output power of the constant voltage power source unit 420 flows to the ground through the electromagnet coil 440 and the transistor FET1, and when the transistor FET1 is in the off state, The electric power stored in the electromagnet coil 440 flows through the discharging circuit unit 430. [0053]

Therefore, the electromagnet coil 440 is kept in the energized state, whereby the electromagnetic switch of the electronic contact apparatus can maintain the closed state to be able to supply electric power to the load.

The constant voltage power supply unit 420 included in the electronic contact apparatus according to the embodiment of the present invention includes a constant voltage output unit formed by connecting a plurality of transistors in series, Can be provided. In other words, when a power source applied from the outside includes noise such as a surge, it is dispersively applied to a plurality of (N) transistors, so that a failure of the constant voltage power source part 420 due to burnout or the like of the transistor, It is possible to prevent the occurrence of malfunctions and malfunctions of the components connected to the rear end of the vehicle.

The detailed configuration of the constant voltage power supply unit 420 and the constant voltage output unit included therein will be described with reference to FIGS. 2 and 3 described above.

The present invention is not limited to the above-described embodiments, and various changes, substitutions, and alterations can be made hereto without departing from the scope of the present invention. But the present invention is not limited thereto.

110, 210: constant voltage supply unit 115, 215: first current limiting unit
120, 220, 225: constant voltage output unit 130, 230, 235:
140, 240: heat dispersing portion 150, 250:
160, 260: Noise removing unit 410: Rectifying circuit part
420: constant voltage power supply unit 430:
440: Electromagnet coil 450: Switching part
460: Pulse width modulation section

Claims (4)

A constant voltage supply unit for supplying a constant voltage signal;
A first current limiting unit for limiting a current to an input power source applied to the constant voltage supply unit;
A constant voltage output unit for outputting a constant voltage power using a constant voltage signal supplied from the constant voltage supply unit;
A second current limiting unit for limiting a current to the input power source applied to the constant voltage output unit; And
And a smoothing unit for smoothing the constant voltage power output from the constant voltage output unit,
Wherein the constant voltage output unit includes a plurality of transistors connected in series,
Wherein the first current limiting unit includes a plurality of resistors connected in series between the input power supply and the constant voltage supply unit,
The constant voltage signal is supplied to the base of any one of the plurality of transistors,
And a signal obtained by voltage-dividing the difference between the input power supply and the constant voltage signal by the plurality of resistors is supplied to the other remaining base of the plurality of transistors. The method according to claim 1,
And a heat dissipation unit connected in parallel with the constant voltage output unit to dissipate heat generated from the constant voltage output unit,
Wherein the heat dispersing unit is constituted by connecting a plurality of resistance elements in parallel. 3. The method of claim 2,
Wherein the heat dissipation unit is connected between the collector side input terminal of the first transistor and the emitter side output terminal of the last transistor among the plurality of serially connected transistors.
The method according to claim 1,
Further comprising a noise eliminator for removing impulse noise of the input power supply,
Wherein the noise removing unit is constituted by a zener diode.
KR1020150056533A 2015-04-22 2015-04-22 Constant voltage source KR101748023B1 (en)

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KR101748023B1 true KR101748023B1 (en) 2017-06-16

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007257104A (en) * 2006-03-22 2007-10-04 Fuji Electric Device Technology Co Ltd Series regulator
JP2014206803A (en) * 2013-04-11 2014-10-30 ソニー株式会社 Power supply circuit, power supply system, and electric storage device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007257104A (en) * 2006-03-22 2007-10-04 Fuji Electric Device Technology Co Ltd Series regulator
JP2014206803A (en) * 2013-04-11 2014-10-30 ソニー株式会社 Power supply circuit, power supply system, and electric storage device

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