EP3075066A2 - Alimentation à découpage et procédé de réglage d'une tension de sortie d'une alimentation à découpage - Google Patents

Alimentation à découpage et procédé de réglage d'une tension de sortie d'une alimentation à découpage

Info

Publication number
EP3075066A2
EP3075066A2 EP14799162.4A EP14799162A EP3075066A2 EP 3075066 A2 EP3075066 A2 EP 3075066A2 EP 14799162 A EP14799162 A EP 14799162A EP 3075066 A2 EP3075066 A2 EP 3075066A2
Authority
EP
European Patent Office
Prior art keywords
power supply
temperature
switching power
output voltage
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14799162.4A
Other languages
German (de)
English (en)
Inventor
Klaus Schürmann
Michael Buschkamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weidmueller Interface GmbH and Co KG
Original Assignee
Weidmueller Interface GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weidmueller Interface GmbH and Co KG filed Critical Weidmueller Interface GmbH and Co KG
Publication of EP3075066A2 publication Critical patent/EP3075066A2/fr
Withdrawn legal-status Critical Current

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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
    • H02M7/219—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration
    • 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
    • H02M3/156—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 with automatic control of output voltage or current, e.g. switching regulators
    • 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
    • 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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures

Definitions

  • the invention relates to a switching power supply for converting an input voltage into an output voltage, the at least one of a
  • Pulse width modulation circuit clocked controlled switching stage wherein a control circuit is provided which acts on the pulse width modulation circuit for changing the height of the output voltage.
  • the invention further relates to a method for regulating an output voltage of a
  • a switching power supply usually an input AC voltage is first rectified and then converted with a switching stage in an AC voltage considerably higher frequency.
  • This input-side high-frequency AC voltage is, for example by means of a transformer, transformed into an output-side high-frequency AC voltage smaller or larger amount and rectified again. To the won so
  • Such switching power supplies have a control circuit that controls the DC output voltage regardless of a load connected to a constant value as possible. This is due to a change in the frequency and / or the pulse width or the
  • Pulse width modulation possible.
  • the switching power supply to a PWM switching stage which is influenced by the control loop.
  • Input-side switching stage also have an output side arranged switching stage, or it is provided both the input side and the output side, a switching stage for converting a rectified AC voltage into an AC voltage higher frequency.
  • a switching stage for converting a rectified AC voltage into an AC voltage higher frequency.
  • Output voltages are at least slightly different, which may have greatly divergent output currents of the individual power supplies result.
  • An inventive switching power supply of the type mentioned above is characterized in that the control circuit has a temperature sensor which is provided for measuring a load-dependent temperature of the switching power supply, wherein the control circuit is arranged so that the output voltage is lowered with increasing temperature.
  • the switched-mode power supply unit heats up or at least heats up at least individual components (components) of the power supply unit
  • the temperature sensor detects this
  • the load is distributed in a parallel connection of several power supply units to the interconnected power supply units.
  • the control circuit can, for example, an evaluation circuit for the
  • Temperature sensor comprising a threshold switch.
  • a Threshold temperature selected between 70 and 100 ° C (degrees Celsius), and more preferably between 85 and 95 ° C.
  • Output voltage linearly lowered with increasing temperature.
  • the lowering of the output voltage between 0.005 and 0.025 V / K (volts / Kelvin, corresponds to V / ° C) and more preferably between 0.015 and 0.02 V / K.
  • the reduction can be relatively easily implemented, for example, by the fact that the control circuit has an evaluation circuit with a
  • a linear functional relationship between the measured temperature and the output voltage can be easily implemented circuitry and leads to a good-natured control behavior in a parallel circuit of multiple power supplies, in which a swing in a control situation in which constantly another power supply is excessively loaded.
  • control circuit comprises a
  • control circuit is additionally or alternatively designed as a current control.
  • Temperature sensor a temperature-dependent resistor. This can as
  • Thermistor or be designed as a PTC thermistor. In principle, however, are also designed as a switching transistor or as semiconductor temperature sensors
  • the temperature sensor is preferably arranged on an output side of the switched-mode power supply and is in thermal contact with a component of the switched-mode power supply.
  • the temperature sensor with a
  • the switching power supply is preferred as a so-called wide-range power supply
  • the height of the input voltage is preferably in the range of 10 to 300V, more preferably in the range of 15 to 265V.
  • the object is further solved by a method for controlling a
  • Output voltage is adjusted depending on the measured temperature. Preferably, the output voltage is lowered with increasing temperature and lowered in particular linearly with the temperature. More preferably, the output voltage is lowered with increasing temperature when the temperature is greater than a predetermined threshold temperature. This results in the advantages described in connection with the switching power supply.
  • Figure 1 is a schematic diagram of a switching power supply
  • FIG. 2 is a more detailed circuit diagram of a portion of the switched mode power supply.
  • Figure 3 is a schematic representation of the dependence of a
  • FIG. 4 shows a more detailed circuit diagram of an evaluation circuit of FIG.
  • Switched-mode power supply 1 of FIG. 1 is provided for converting an input voltage UE, here an input AC voltage, into an output voltage UA (here an output DC voltage).
  • the input voltage U E is converted by a rectifier 2 into a pulsating DC voltage Ui, which is smoothed and / or screened by means of a smoothing module 3.
  • the smoothing module 3 has a first smoothing capacitor Ci.
  • the AC voltage U 3 is smaller with the transformer 5 in a secondary side higher frequency AC voltage U 3 (or in certain
  • the secondary-side higher-frequency AC voltage U 3 is rectified again in a secondary-side rectifier 6 in a secondary-side DC voltage and smoothed in a secondary-side smoothing assembly 7 and / or screened.
  • the secondary-side smoothing module 7 here by way of example has a further smoothing capacitor C 2 .
  • more complex circuits of a plurality of in particular discrete components are preferred for the secondary-side smoothing module 7.
  • the output voltage of the secondary-side smoothing module 7 is the here positive output voltage U A of the power supply 1 with respect to a reference potential GND.
  • a control circuit 8 which compares the output voltage UA with a reference voltage and depending on the comparison to a
  • Pulse width modulation (PWM) circuit 9 acts.
  • the PWM circuit 9 controls the switching stage 4 and changes according to the specifications of
  • Control circuit 8 the clock parameters, in particular a clock ratio, but possibly also a clock frequency, the switching stage 4, whereby the output voltage U A is influenced. It is formed so a loop through which the Output voltage U A is kept at a desired, predetermined value.
  • a current regulation not shown here, can additionally be provided, by means of which the current delivered to the load 110 can be limited.
  • Such a switching power supply 1 often also has a filter (not shown), with which the input AC voltage U E is filtered before rectification to filter out harmonics, surges and / or network interference.
  • the transformer 5 can also have a plurality of secondary windings (not shown) with which secondary-side alternating voltages of different heights can be generated.
  • a plurality of rectifiers 6 and smoothing assemblies 7 are provided for the different secondary alternating voltages.
  • control circuit 8 is set up to measure a temperature of a component which heats up as the load of the switched-mode power supply 1 increases, and to regulate the output voltage U A as a function of this temperature. This will be explained in more detail below in connection with FIGS. 2 to 4.
  • FIG. 2 shows the control circuit 8 of the switched mode power supply 1 in more detail.
  • Output voltage UA is applied to the inverting input of a voltage divider formed by two resistors Ri and R 2
  • Operational amplifier 82 is acted upon by a reference voltage L provided by a reference voltage source 83.
  • the operational amplifier 82 is connected as a negative feedback amplifier by a
  • Counter-coupling branch is formed with a negative feedback resistor R 0 .
  • the negative feedback resistor R 0 a capacitor C 0 is connected in parallel. The output of the
  • Operational amplifier 82 is indirectly connected to the input of the PWM circuit 9 via an opto-coupler 84, which serves for galvanic isolation. These just described components of the control circuit 8 are used to set an initially constant output voltage U A of the switching power supply. 1
  • a temperature sensor S is provided, which is thermally coupled to a component of the switching power supply 1, which heats up during operation and load of the switching power supply 1.
  • This component may be one of the arranged in the load circuit components or assemblies, such as the secondary-side rectifier 6 or even the primary-side rectifier 2 or
  • the temperature sensor S is in the illustrated example of Figure 2 is a temperature-dependent resistor R # , for example, a thermistor or a PTC thermistor.
  • R # temperature-dependent resistor
  • temperature sensors based on another principle are also suitable, for example semiconductor temperature sensors.
  • the temperature sensor S is connected to an evaluation circuit 81, which depends on a measured temperature T at an output a
  • the output of the evaluation circuit 81 is also connected via a resistor R 3 to the inverting input of
  • Temperature T shown in a curve 20. At a temperature T which is between an ambient temperature T 0 and a threshold temperature T s , the voltage U # is zero. In this temperature range, the one
  • Output voltage UA of the switching power supply 1 is thus guided via a voltage divider to the inverting input of the operational amplifier 82, which is composed of the resistor R 2 and a parallel connection of the resistors Ri and R 3 . Together with the magnitude of the reference voltage U ref , the resistance values Ri to R 3 determine the nominal level of the output voltage UA. If the temperature T exceeds the threshold temperature Ts, the
  • Temperature sensor S measured temperature T over the
  • Threshold temperature T s occur, which leads to a reduction in the
  • Output voltage UA leads. By lowering the output voltage UA reduces the load of this switching power supply 1, which slowly lowers its temperature T again and the output voltage is in turn slightly increased. In the interaction of at least two or more switching power supplies 1 connected in parallel, an equal distribution of the load of the switched-mode power supply 1 is established.
  • the temperature inertia with which changes the temperature of components of the switching power supply 1, causes a large time constant of a few minutes of this temperature-dependent part of the control loop, the
  • FIG. 4 shows a suitable structure of the evaluation circuit 81 in more detail.
  • the evaluation circuit 81 comprises an operational amplifier 81 1, which is supplied with an asymmetrical supply voltage (reference potential GND and a positive supply voltage V + ). Accordingly, the asymmetrical supply voltage (reference potential GND and a positive supply voltage V + ). Accordingly, the asymmetrical supply voltage (reference potential GND and a positive supply voltage V + ). Accordingly, the evaluation circuit 81 comprises an operational amplifier 81 1, which is supplied with an asymmetrical supply voltage (reference potential GND and a positive supply voltage V + ). Accordingly, the asymmetrical supply voltage (reference potential GND and a positive supply voltage V + ). Accordingly, the asymmetrical supply voltage (reference potential GND and a positive supply voltage V + ). Accordingly, the asymmetrical supply voltage (reference potential GND and a positive supply voltage V + ). Accordingly, the asymmetrical supply voltage (reference potential GND and a positive supply voltage V
  • Output of this operational amplifier 81 1 with respect to the reference potential GND assume no negative voltages.
  • the non-inverting input of the operational amplifier 81 1 is connected via the temperature-dependent resistor R # used with the positive reference voltage U re f and via a resistor R to the reference potential GND.
  • the inverting input of the operational amplifier 81 1 is connected via a resistor R 6 to the reference potential and via a resistor R 6 with his Output.
  • the temperature-dependent resistor R # is in the illustrated embodiment, a thermistor whose resistance decreases with increasing temperature T. Accordingly, at the non-inverting input of the operational amplifier 81 1, the potential increases as the temperature T increases. At the threshold temperature T s , the potential does not exceed
  • Inverting input the potential at the inverting input, which is formed by the voltage divider from the resistors R 5 and R 6 . Due to the negative feedback via the resistor R 6 , the output voltage of the operational amplifier increases proportionally with increasing temperature T.
  • Threshold switch which provides a non-zero output voltage U # only when the temperature T becomes higher than that
  • Threshold temperature T s Threshold temperature T s .
  • the negative feedback effects a voltage U # which then increases linearly with a further temperature T.
  • a temperature other than a linear temperature dependence of the voltage U # may be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne une alimentation à découpage (1), servant à convertir une tension d'entrée (UEin) en une tension de sortie (UA), qui comprend au moins un étage de découpage (4), commandé de manière cadencée par un circuit de modulation de largeur d'impulsions (9), et un circuit de réglage (8) qui agit sur le circuit de modulation de largeur d'impulsions (9) afin de faire varier l'amplitude de la tension de sortie (UA). L'alimentation à découpage (1) est caractérisée en ce que le circuit de réglage (8) comporte un capteur de température (S) qui sert à mesurer une température (T) dépendante de la charge de l'alimentation à découpage (1). Le circuit de réglage (8) est adapté pour faire baisser la tension de sortie (UA) à mesure que la température (T) augmente. L'invention concerne en outre un procédé de réglage d'une tension de sortie (UA) d'une alimentation à découpage (1).
EP14799162.4A 2013-11-25 2014-11-18 Alimentation à découpage et procédé de réglage d'une tension de sortie d'une alimentation à découpage Withdrawn EP3075066A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013113012.7A DE102013113012A1 (de) 2013-11-25 2013-11-25 Schaltnetzteil und Verfahren zum Regeln einer Ausgangsspannung eines Schaltnetzteils
PCT/EP2014/074832 WO2015075010A2 (fr) 2013-11-25 2014-11-18 Alimentation à découpage et procédé de réglage d'une tension de sortie d'une alimentation à découpage

Publications (1)

Publication Number Publication Date
EP3075066A2 true EP3075066A2 (fr) 2016-10-05

Family

ID=51900883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14799162.4A Withdrawn EP3075066A2 (fr) 2013-11-25 2014-11-18 Alimentation à découpage et procédé de réglage d'une tension de sortie d'une alimentation à découpage

Country Status (4)

Country Link
EP (1) EP3075066A2 (fr)
CN (1) CN105745830A (fr)
DE (1) DE102013113012A1 (fr)
WO (1) WO2015075010A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015115253B4 (de) 2015-09-10 2020-09-17 Semikron Elektronik Gmbh & Co. Kg Steuereinrichtung und Verfahren zur Überwachung der elektrischen Energieversorgung einer Ansteuereinrichtung

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Publication number Priority date Publication date Assignee Title
ATE213573T1 (de) * 1994-01-22 2002-03-15 Daimlerchrysler Rail Systems Verfahren und vorrichtung zur symmetrierung der belastung parallelgeschalteter leistungshalbleitermodule
US6449174B1 (en) * 2001-08-06 2002-09-10 Fairchild Semiconductor Corporation Current sharing in a multi-phase power supply by phase temperature control
US7412612B2 (en) * 2004-02-24 2008-08-12 Delphi Technologies, Inc. Dynamically optimized power converter
CN2742669Y (zh) * 2004-08-30 2005-11-23 株洲九方电器设备有限公司 一种新型控制电源
CN101477331B (zh) * 2009-01-16 2010-08-18 深圳威迈斯电源有限公司 一种控制系统的温度特性补偿方法和电路
JP5856391B2 (ja) * 2010-07-01 2016-02-09 キヤノン株式会社 Ｄｃ／ｄｃコンバータ及び電子機器
US8587272B2 (en) * 2011-05-25 2013-11-19 Linear Technology Corporation Balancing temperatures in a multi-phase DC/DC converter
CN202406025U (zh) * 2011-12-09 2012-08-29 佛山市南庄广昌电器塑料有限公司 可调恒流及温控软保护开关电源电路
GB2517475A (en) * 2013-08-22 2015-02-25 Utilitywise Plc Voltage regulator

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See also references of WO2015075010A2 *

Also Published As

Publication number Publication date
DE102013113012A1 (de) 2015-05-28
WO2015075010A2 (fr) 2015-05-28
CN105745830A (zh) 2016-07-06
WO2015075010A3 (fr) 2015-07-23

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