WO2005112243A1 - スイッチング電源装置 - Google Patents
スイッチング電源装置 Download PDFInfo
- Publication number
- WO2005112243A1 WO2005112243A1 PCT/JP2005/008872 JP2005008872W WO2005112243A1 WO 2005112243 A1 WO2005112243 A1 WO 2005112243A1 JP 2005008872 W JP2005008872 W JP 2005008872W WO 2005112243 A1 WO2005112243 A1 WO 2005112243A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power supply
- inductor
- transformer
- switching
- voltage
- Prior art date
Links
Classifications
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/40—Means for preventing magnetic saturation
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
- H02M3/3385—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current
- H02M3/3387—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current in a push-pull configuration
- H02M3/3388—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current in a push-pull configuration of the parallel type
Definitions
- the present invention relates to a power supply that requires a small amount of switching noise, and particularly to a power supply device that is optimal for audio equipment and lighting equipment. Also, if the switching noise is reduced, the leakage current can be reduced by making the Y capacitor smaller, which is preferable for medical equipment.
- PS power supply SMZ power supply
- partial resonance power supply partial resonance power supply
- quasi-resonance power supply and resonance type Loyer's converter method are often used for inverter type lighting equipment.
- the voltage waveform applied to the transformer has a trapezoidal shape.
- the oblique portion of the trapezoid is the time during which voltage resonance occurs.
- voltage resonance that causes the voltage waveform to have a sine wave shape is more preferable and still not sufficient for audio applications.
- these have the advantage that they can easily be used in the 230 VAC area due to the half-bridge configuration, driving the high-side switch is troublesome. For this reason, it is not preferable for consumer equipment from the viewpoint of cost.
- the quasi-resonant converter performs soft switching at turn-on, but hard switching at turn-off, so the noise reduction effect itself is not sufficient.
- Resonant Loyal converters are convenient for lighting equipment that does not output DC, as switching noise is reduced.
- self-excited oscillation by a bipolar transistor is mainly used. In this case, it is difficult to increase the frequency at present due to the storage time of the element. If the frequency cannot be increased, it is not enough for audio for the reasons described below.
- the MOSFET can operate at high speed, but when self-excited oscillation is used, the gate is driven with a waveform close to a sine wave, so the simultaneous off period is easily formed and the loss increases. Furthermore, when self-oscillation is performed by the MOSFET, the two switches may be turned on at the same time at the start, and the switching element itself may be destroyed.
- Bipolar transistors and MOSFETs are both! High in self-excited oscillation even if they are out of alignment, and it is difficult to optimize the timing at the frequency.
- an inrush current to the output smoothing capacitor occurs when the power is turned on, and at this time, the primary-side inductor easily saturates. I do.
- the first requirement for audio applications is to extremely reduce switching noise.
- a switching frequency in the range of 88 kHz or more and 150 kHz or less is preferable even if it appears.
- the main cause of common mode noise is the capacitance between the primary and secondary of the transformer.Therefore, reducing the capacitance and reducing the voltage waveform to a waveform with fewer harmonics, that is, a sine wave A method in which the cycle resonates with the voltage is more preferable.
- the second request is a response. If lkH enters a class B audio amplifier, load fluctuations will occur 1000 times per second. An example of poor response is ringing at load fluctuations that repeat between 0% and 100%, and ringing around 2kHz, which is easy to hear. When ringing occurs, the power supply terminal of the amplifier is shaken, which is adversely affected through the amplifier's SVRR (Supply Voltage Rejection Rerio) and has a unique sound. In fact, driving a car audio power IC with a notebook PC switching power supply that does not even take into account the response often leads to "ringing!
- SVRR Serialply Voltage Rejection Rerio
- electrolytic capacitors for high-quality sound have been released by electrolytic capacitor manufacturers, but these are different from switching applications, but the resistance at the switching frequency is not necessarily reduced. ,. For this reason, even if you try to select an audio capacitor with your favorite sound quality, a general switching power supply has good high-frequency characteristics, which limits it.
- the present invention focuses on the merit of a resonance-type loyal converter that has low switching noise and does not require a high-side driver, and relates to an improvement for audio equipment based on this.
- Figure 1 shows the basic circuit of the resonant Loyal converter.
- the switching power supply for audio use a frequency of around 90 kHz or higher, which has little noise and does not affect hearing even if it is generated.
- the target was set to 88 kHz or more because it is more than twice the sampling frequency of CD. Also, since the EMI noise standard regulates over 150 kHz, the switching frequency should be in the range of 88 kHz to 150 kHz after all.
- the first invention of the present application provides a DC power supply, a first inductor having one end connected to the DC power supply, the other end of the first inductor, and a transformer having a center tap on a primary winding.
- the center tap is connected, both ends of the primary winding of the transformer are connected to a first switching element and a second switching element, each of which alternately switches, and the secondary winding of the transformer is rectified.
- a second inductor is inserted between the rectifier circuit and the smoothing means, and the first inductor and the second inductor are formed of the same magnetic circuit. It is characterized by coupling in the direction that cancels the DC magnetic flux.
- An electrolytic capacitor manufacturer has released an electrolytic capacitor for high sound quality. However, these have different switching applications and do not mean that the resistance at the switching frequency is reduced. However, in this method, the output current has continuity and the switching frequency is close to DC. It is possible to freely select a capacitor for power supply without the restriction that the high frequency characteristics are good.
- the second invention of the present application relates to a DC power supply, a first inductor having one end connected to the DC power supply, the other end of the first inductor, and a transformer having a center tap on a primary winding.
- the center tap is connected, and both ends of the primary winding of the transformer are connected to a first switching element and a second switching element, each of which alternately switches, and the secondary winding of the transformer is connected to an alternating current.
- a rectifier and a second inductor are provided between a secondary winding of the transformer and the AC load, and a rectified one-way current flows through the second inductor.
- the first inductor and the second inductor are coupled in the same magnetic circuit in such a direction as to cancel the DC magnetic flux.
- the third invention of the present application is to reduce the DC magnetic flux by making the ratio of the number of primary windings and the number of secondary windings of the transformer equal to the ratio of the number of windings of the first inductor to the number of windings of the second inductor. It is characterized by strict cancellation.
- the fourth invention of the present application is directed to a DC power supply, an inductor having one end connected to the DC power supply, the other end of the inductor, and the center tap of a transformer having a center tap in a primary winding.
- both ends of the primary winding of the transformer are connected to a first switching element and a second switching element, each of which is alternately switched.
- the second switching element and the second switching element are simultaneously turned off, the inductor and the further winding and the diode are provided so that the voltage at the other end of the inductor does not excessively increase, and the energy accumulated in the inductor is reduced. It is characterized by limiting the voltage rise at the other end of the inductor by connecting it regeneratively to the power supply.
- the device was devised so that even if the OCP worked, the switching element would not be damaged by overvoltage.
- the fifth invention of the present application provides a DC power supply, an inductor having one end connected to the DC power supply, The other end of the inductor is connected to the center tap of a transformer having a center tap in the primary winding, and both ends of the primary winding of the transformer are switched in a first manner.
- the secondary winding of the transformer is connected to a switching element and a second switching element, and a secondary winding of the transformer is smoothed by a smoothing means via a rectifier circuit, or a synchronization signal input terminal in a power supply directly supplied to an AC load.
- the center tap voltage of the transformer or a tertiary winding is installed on the transformer, and By injecting into the terminal for inputting the synchronization signal of the control IC or the terminal for determining the oscillation frequency, using one of the voltages obtained by regulating the next winding, By determining the temperate timing of cycle, characterized in that to substantially self-excited oscillation operation.
- the present invention uses a separately-excited IC and drives at the optimal timing and operates at 88 kHz or higher. The aim was to achieve high efficiency at 150kHz.
- a switching element is driven using a general-purpose IC in this manner, the switching element is started with hysteresis characteristics, so there is no instability at the time of starting. Easy OCP.
- the sixth invention of the present application is characterized in that the power supply device of the fifth invention of the present application performs waveform shaping by using a comparator on whether the center tap voltage force of the transformer is the rectified voltage of the tertiary winding. I do.
- the comparator of the power supply device uses a PNP or a PchFET to rectify the center tap voltage of the transformer or the voltage obtained by rectifying the tertiary winding and the voltage of the tertiary winding. The comparison is made between a rectified and smoothed voltage or a reference voltage.
- a PNP or PchFET as a comparator in this way, a high-speed comparator can be configured inexpensively, easily, and stably.
- the power supply device of the fifth invention to the seventh invention of the present application differentiates the output signal of the comparator and injects it into a terminal for inputting a synchronization signal or a terminal for determining an oscillation frequency. It is characterized by that.
- the pin for inputting the synchronizing signal of the general-purpose IC or the pin for determining the oscillation frequency goes low when entering the next cycle, otherwise accurate operation cannot be expected. Therefore, the differentiation function was used to easily set the low level before the next cycle.
- the ninth invention of the present application is the power supply device of the fifth to eighth inventions, wherein a diode and a resistor are connected in parallel between the control IC and the switching element for driving time adjustment, or a transistor and a resistor are connected. It is characterized by using a parallel connection of the above and inserting it in a direction to increase the on-time.
- the duty ratio For optimal operation of the resonant Loyal converter, the duty ratio must be adjusted to 50%. However, since a general-purpose IC suitable for the present invention has a maximum duty ratio of 49%, the on-time must be slightly increased.
- a tenth invention of the present application is characterized in that the operating frequency of the power supply device of the first to ninth inventions of the present application is set to be 88 kHz or more and 150 kHz or less.
- An eleventh invention of the present application is an audio device using the power supply device of the first invention to the tenth invention of the present application.
- AC power supply 100 is rectified by rectifiers 101 to 104 and smoothed by smoothing capacitor 105 to become a DC power supply.
- This DC power is supplied to the center tap at the intersection of the primary windings 108a and 108b of the transformer 108 via the winding 106a of the coupling inductor 106.
- Both ends of the primary windings 108a and 108b are connected to the resonance capacitor 130 and also connected to the two switching elements 109a and 109b.
- This resonance capacitor can be only on the primary side or only on the secondary side.
- the voltage waveform becomes a very clear half wave of a sine wave.
- 109c is for overcurrent detection Resistance.
- the current flowing through the secondary windings 108c and 108d of the transformer is rectified by the rectifiers 11 la and 11 lb, smoothed by the smoothing capacitor 112 via the winding 106c of the coupling inductor 106, and output.
- the windings 108a, 108b, 108c, and 108d of the transformer 108 and the windings 106a and 106c of the coupling inductor 106 all have the same number of turns and that they operate ideally, the point X can be easily calculated.
- the voltage waveforms at point Y completely match, and the primary and secondary become symmetrical.
- the inductance of the coupling inductor 106 When the inductance of the coupling inductor 106 is increased, the current flowing therethrough approaches a constant current, so that the current flowing through the switching elements 109a and 109b becomes close to a square wave, thereby suppressing an increase in the effective current and reducing loss. . If the inductance of the coupling inductor 106 is small, a current of twice the switching frequency is superimposed on the current flowing through the switching elements 109a and 109b, so that the effective current increases and the loss increases.
- the resistors 114a to 114c and the transistor 114d are a start-up circuit.
- the currents of the windings 108e and 108f (tertiary winding) of the transformer 108 become diodes 131 and 132. It is supplied to the capacitor 113 via 133, and when the normal voltage is reached, the starting current is drastically reduced.
- the resistor 134 is for adjusting the voltage waveform at the point Z described later.
- the potential (point X) at the intersection of the primary windings 108a and 108b of the transformer 108 is divided by the resistors 117 and 118 using a comparator composed of the transistor 119 and the resistor 120 as a load resistor.
- the voltage obtained by rectifying and smoothing the voltage of the tertiary winding that is, the VCC voltage of the control IC 125, is divided by the resistors 140 and 141 and passed through the transistor 142, and differentiated by the capacitor 121. This is injected into the synchronization input of the control IC125.
- point X and point Z have the same waveform, so point Z can be used instead.
- the reason for the differentiation is that the synchronization signal must be at a low level before the next ON signal. By switching to the next cycle with the synchronization signal, the ZVS operation can be performed more accurately than self-excited oscillation even though the control IC for separate excitation is used.
- the resistor and capacitor 110a inserted into the gates of the switching elements 109a and 109b are used to reduce the on-time of the capacitor 110a.
- the SG3525A of the control IC125 has a maximum duty ratio of 49%, and a narrow simultaneous OFF period occurs, so this correction is used. Even a circuit in which a diode is replaced with a transistor works well. The direction of the diode is opposite to that of a general circuit inserted to reduce noise.
- the capacitor 135 is a device for making the resonance state symmetric even in such a case. By making the resonance symmetrical, the voltage rise at light load is reduced, the regulation is improved and the sound quality is improved.
- FIG. 3 shows an example of a circuit for supplying a load that is not converted to direct current, such as lighting equipment, based on FIG. 2, and mainly shows a change on the secondary side.
- the voltage generated in the winding 108c of the transformer 108 is bridge-rectified by the diode 11 la and 11 Id, and the current flowing through the winding 106c of the coupling inductor 106 is configured to flow in the same direction. This cancels out the magnetic flux generated in.
- the emitter of the transistor 119 is connected to Vref of 5 V to simplify the circuit.
- FIG. 1 is a basic circuit diagram of a conventional resonant Loyal converter.
- FIG. 2 is a circuit diagram showing a power supply device according to a first embodiment of the present invention.
- FIG. 3 is a circuit diagram showing a power supply device according to a second embodiment of the present invention. Explanation of reference numerals
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/558,799 US7272019B2 (en) | 2004-05-17 | 2005-05-16 | Switching power supply apparatus |
EP05739283A EP1748541A1 (en) | 2004-05-17 | 2005-05-16 | Switching power supply device |
JP2006513580A JP4769714B2 (ja) | 2004-05-17 | 2005-05-16 | スイッチング電源装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004146552 | 2004-05-17 | ||
JP2004-146552 | 2004-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005112243A1 true WO2005112243A1 (ja) | 2005-11-24 |
Family
ID=35394477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/008872 WO2005112243A1 (ja) | 2004-05-17 | 2005-05-16 | スイッチング電源装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7272019B2 (ja) |
EP (1) | EP1748541A1 (ja) |
JP (1) | JP4769714B2 (ja) |
WO (1) | WO2005112243A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI837663B (zh) | 2022-05-16 | 2024-04-01 | 宏碁股份有限公司 | 抑制磁飽和之電源供應器 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI384740B (zh) * | 2009-06-05 | 2013-02-01 | Chimei Innolux Corp | 可擴充交換式電源電路 |
JP5693048B2 (ja) * | 2010-05-31 | 2015-04-01 | キヤノン株式会社 | 電流共振電源 |
JP5504129B2 (ja) * | 2010-10-18 | 2014-05-28 | 東芝テック株式会社 | 電力変換装置 |
CN102299616B (zh) * | 2011-08-23 | 2013-09-25 | 广州金升阳科技有限公司 | 一种自激推挽式变换器 |
CN102291001B (zh) * | 2011-08-26 | 2014-01-01 | 广州金升阳科技有限公司 | 一种自激推挽式变换器 |
JP5873293B2 (ja) * | 2011-10-31 | 2016-03-01 | キヤノン株式会社 | 電源装置および画像形成装置 |
CN103187889B (zh) * | 2011-12-29 | 2015-08-05 | 中国科学院声学研究所 | 一种便携式高压直流稳压电源 |
WO2014058966A1 (en) * | 2012-10-09 | 2014-04-17 | Murata Manufacturing Co., Ltd. | Lossless over-current detection circuit for royer oscillators and push-pull converters |
CN104578793A (zh) * | 2013-10-21 | 2015-04-29 | 徐州市科诺医学仪器设备有限公司 | 一种直流驱动器 |
WO2015120232A1 (en) * | 2014-02-07 | 2015-08-13 | Murata Manufacturing Co., Ltd. | Voltage converter including voltage doubler and voltage regulator in a royer oscillator |
CN208589912U (zh) * | 2014-10-24 | 2019-03-08 | 株式会社村田制作所 | 饱和自振荡推挽式隔离dc-dc转换器 |
CN106329928B (zh) * | 2015-06-26 | 2018-11-02 | 光宝科技股份有限公司 | 谐振转换器 |
CN110601545A (zh) * | 2019-09-26 | 2019-12-20 | 胡江 | 一种基于Royer的双向或多向DC-DC转换电路 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55142054U (ja) * | 1979-03-29 | 1980-10-11 | ||
JPH0614251A (ja) * | 1992-05-19 | 1994-01-21 | Matsushita Electric Ind Co Ltd | スイッチング電源回路 |
JPH06284719A (ja) * | 1993-03-31 | 1994-10-07 | Toshiba Lighting & Technol Corp | 高周波スイッチング電圧変換回路 |
JP2000166235A (ja) * | 1998-11-26 | 2000-06-16 | Sony Corp | スイッチング電源回路 |
JP2003309981A (ja) * | 2002-02-14 | 2003-10-31 | Kazuo Kono | 自励発振回路 |
JP2003533163A (ja) * | 2000-05-05 | 2003-11-05 | チューク、スロボダン | スイッチングdc−dc変換器 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6118673A (en) * | 1998-06-01 | 2000-09-12 | Virginia Power Technologies, Inc. | Single-stage AC/DC converters with saturable conductor PFC |
US6115271A (en) * | 1999-10-04 | 2000-09-05 | Mo; Chan Ho Simon | Switching power converters with improved lossless snubber networks |
US6169668B1 (en) * | 1999-10-27 | 2001-01-02 | Space Systems/Loral, Inc. | Zero voltage switching isolated boost converters |
-
2005
- 2005-05-16 WO PCT/JP2005/008872 patent/WO2005112243A1/ja not_active Application Discontinuation
- 2005-05-16 JP JP2006513580A patent/JP4769714B2/ja not_active Expired - Fee Related
- 2005-05-16 EP EP05739283A patent/EP1748541A1/en not_active Withdrawn
- 2005-05-16 US US10/558,799 patent/US7272019B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55142054U (ja) * | 1979-03-29 | 1980-10-11 | ||
JPH0614251A (ja) * | 1992-05-19 | 1994-01-21 | Matsushita Electric Ind Co Ltd | スイッチング電源回路 |
JPH06284719A (ja) * | 1993-03-31 | 1994-10-07 | Toshiba Lighting & Technol Corp | 高周波スイッチング電圧変換回路 |
JP2000166235A (ja) * | 1998-11-26 | 2000-06-16 | Sony Corp | スイッチング電源回路 |
JP2003533163A (ja) * | 2000-05-05 | 2003-11-05 | チューク、スロボダン | スイッチングdc−dc変換器 |
JP2003309981A (ja) * | 2002-02-14 | 2003-10-31 | Kazuo Kono | 自励発振回路 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI837663B (zh) | 2022-05-16 | 2024-04-01 | 宏碁股份有限公司 | 抑制磁飽和之電源供應器 |
Also Published As
Publication number | Publication date |
---|---|
EP1748541A1 (en) | 2007-01-31 |
JP4769714B2 (ja) | 2011-09-07 |
US20060250822A1 (en) | 2006-11-09 |
JPWO2005112243A1 (ja) | 2008-03-27 |
US7272019B2 (en) | 2007-09-18 |
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