WO2001063737A1 - Circuit d'alimentation electrique - Google Patents

Circuit d'alimentation electrique Download PDF

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Publication number
WO2001063737A1
WO2001063737A1 PCT/JP2001/001319 JP0101319W WO0163737A1 WO 2001063737 A1 WO2001063737 A1 WO 2001063737A1 JP 0101319 W JP0101319 W JP 0101319W WO 0163737 A1 WO0163737 A1 WO 0163737A1
Authority
WO
WIPO (PCT)
Prior art keywords
output
power supply
voltage
input
circuit
Prior art date
Application number
PCT/JP2001/001319
Other languages
English (en)
Japanese (ja)
Inventor
Hiroyuki Kimura
Original Assignee
Lucent Technologies Inc.
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 Lucent Technologies Inc. filed Critical Lucent Technologies Inc.
Priority to AU34133/01A priority Critical patent/AU3413301A/en
Publication of WO2001063737A1 publication Critical patent/WO2001063737A1/fr

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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
    • 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
    • H02M7/2176—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 comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output

Definitions

  • the present invention relates to an electric device and an electric circuit, and more particularly to a power supply that obtains a DC current from an AC power supply.
  • the first method is to directly obtain the required AC voltage using a transformer, rectify and smooth it, and obtain the DC current of the required voltage (Fig. 5).
  • This method has been used for many years and is still popular today because it is simple to construct and relatively efficient. However, at frequencies as low as 5 OHz to 60 Hz, efficient transformers have become heavy and large, and this has been a problem in the current era of lightness and shortness.
  • the second method is called a switching 'regulator'.
  • a switching 'regulator' For example, once the input AC current is rectified, then it is converted to another frequency that is not related to the input, usually a high frequency AC current by an oscillator.
  • the required voltage is obtained by inductors, transformers, etc., re-rectified and smoothed to obtain the DC current of the required voltage (Fig. 6).
  • Fig. 6 the DC current of the required voltage
  • the third method is to divide the input AC current with a resistor, capacitor, coil, etc., obtain a low-voltage AC current, rectify and smooth it, and obtain the DC current of the required voltage.
  • a resistor for voltage division can reduce the size, but it is a problem in terms of heat generation and efficiency, and if a power supply with an input of 100 V or more and an output of several V is used, a capacitor is required. However, there is a problem that it is difficult to make the coil small because the shape becomes large.
  • the fourth method is to cut off a part of the AC by SCR or the like, rectify and smooth it, and obtain the DC current of the required voltage (Fig. 8: U.S. Pat. No. 4,321,523, It is the same as Fig. 2 in JP-A-55-49924.
  • the circuit configuration is relatively simpler and smaller than the previous one, so it has been used for battery chargers and the like.
  • a separate power supply is required for the control circuit, and the resistor R1 consumes 5 W of power, which is problematic in terms of power consumption, and there is no idea of suppressing this power consumption.
  • lower power consumption is required.
  • a power supply that obtains a DC current from a conventional AC power supply is large, heavy, generates a large amount of heat, consumes a large amount of power, has a large noise from the fan that cools the transformer, and has poor overall reliability.
  • the present invention solves the disadvantages of the conventional power supply circuit, and realizes a power supply circuit having features such as small size, light weight, low heat generation, low power consumption, and high reliability with a simpler configuration. Aim.
  • the present invention realizes a simple configuration by lowering the AC input voltage without using a transformer coil in a power supply circuit, and effectively combining a reference voltage generation means and a switch means. concrete Is realized by the configuration described in each claim.
  • the current rectified by the rectifier flows only when the electronic switch is on, and the current is charged to the smoothing capacitor.
  • a load is connected to both ends of the smoothing capacitor.
  • the comparator detects the potential difference between the output voltage of the rectifier and the voltage reference, and outputs a signal to turn on the cascaded electronic switches when the output of the rectifier is lower than the voltage reference.
  • a comparator is provided with a clamp circuit for preventing excessive input, a power supply circuit is configured using a current flowing through the clamp circuit, and power is supplied to the comparator and the voltage reference.
  • FIG. 1 is a circuit diagram illustrating a first embodiment of the present invention.
  • FIG. 3 is a circuit diagram illustrating an example of a reference circuit in FIG. 2;
  • FIG. 3 is a waveform chart showing a voltage at each part in FIGS. 1 and 2.
  • FIG. 9 is a circuit diagram illustrating an example of a conventional power supply circuit.
  • FIG. 11 is a circuit diagram showing another example of a conventional power supply circuit.
  • FIG. 11 is a circuit diagram showing another example of a conventional power supply circuit.
  • FIG. 11 is a circuit diagram showing another example of a conventional power supply circuit.
  • a commercial AC power source enters from v A C 1 and V AC 2, is rectified by the rectifier 1 2 comprising four Daio one de D 1 to D 4, and supplies the output of the positive and negative .
  • the positive side output is connected to one input of the switch circuit 14, one end of the smoothing capacitor C1, and the positive side output of this power supply circuit.
  • the negative output of the rectifier 12 is connected to one end of a reference circuit 13 and one end of an electronic switch 17.
  • the output of the reference circuit 13 is connected to one input of the switch circuit 14.
  • Switch circuit 14 provides output 18 from these inputs. This output 18 is the negative output of the power supply circuit.
  • the switch circuit 14 includes a comparator 16 and an electronic switch 17.
  • the output of the reference circuit 13 is supplied to the inverting input of the comparator 16, the comparator 16 performs a comparison operation, and V If P is greater than Vref , output 19 is applied to one end of electronic switch 17.
  • Electronic Suitsuchi 1 7 performs appropriate control from the input, respectively, for supplying a current one end of the capacitor C 1 and to the negative output V N of the power supply circuit.
  • the electronic switch 17 is composed of, for example, a MOS transistor. In this specification, the terms “switching” and “switch” do not simply mean switching between ON and OFF, but refer to changing the output as desired according to the input.
  • the configuration in the switch circuit 14 includes the comparator 16 and the electronic switch 17, any configuration may be used as long as the configuration provides a desired operation of the present invention.
  • Both outputs V P of the power supply circuit, a load L is connected to V N.
  • the rectifier 12 receives an alternating current as shown in Fig. 4a.
  • Voltage V P at the positive output of the power supply circuit if the reference times Road 13, if the switch circuit 14 (and the capacitor CI) were not, it becomes inclusive curve dotted line which passes through the GND of the curve of V P of Fig. 4 b, the internal power supply 13, switch circuit 14 (and the capacitor V P by the action of C 1) becomes solid piece II of V P of Fig. 4 b.
  • the comparator 16 compares the non-inverting input (+) with the inverting input (1), and supplies the output 19 only when the non-inverting input is greater than the inverting input (the voltage of V M in FIG. 4c). See).
  • Electronic switch 1 7 outputs an output 18 in response to the voltage V M and the input 1 1 output 1 9 of the comparator 1 6.
  • the current flowing through the switch is a pulse wave, but the charge stored in the ON state of Fig. 4c is discharged by the smoothing capacitor C1 in the OFF state, and the output of the smoothed power circuit shown in Fig. 4e is discharged by the smoothing capacitor C1.
  • the configuration of the power supply circuit in Fig. 1 is smaller than that of the conventional power supply circuits in Figs. 5 to 8 because the transformer (transformer) coil is unnecessary because there is no transformer. It has excellent features such as light weight, low power consumption, and high reliability. In addition, since the structure is not simple and the structure is not discarded as heat as the resistor R1 in Fig. 8, it has excellent features such as low heat generation, low power consumption, and high reliability. Has features.
  • FIG. 2 shows another embodiment.
  • the commercial AC power supply enters the V AC1 and V AC2, is rectified by a rectifier composed of four diodes D 1 to D 4, and supplies the output of the positive and negative. Its positive output is connected to one end of the resistor R of the clamp circuit, one end of the smoothing capacitor C 1, the positive output V P of the power supply circuit. The current flowing through the resistance R of the clamp circuit was defined as Ic.
  • the negative output of the rectifier 12 is connected to one end of a reference circuit REF, a power input of a comparator, one end of an internal power supply, and one end of an electronic switch.
  • the internal power consisting of the Zener diode ZD and the capacitor C2 generates a potential Vcc with respect to GND.
  • Each voltage two other ends of the reference circuit REF is configured to be V re have V cc.
  • the comparator CP performs a comparison operation, and outputs the output electronically.
  • Electronic switch 17 supplies current to the negative output V N at one end and the power supply circuit of the line Le ,, capacitor C 1 the appropriate control from the input, respectively. Both outputs V P of the power supply circuit, a load L is connected to V N.
  • the clamp circuit consists of a resistor R and a diode D5.
  • the internal power supply consists of a zener diode ZD and a capacitor C2.
  • the internal power supply generates a voltage with the input current of only the surplus current ICL . Normally, the current flowing in the clamp circuit is discarded and heat is generated.However, since the comparator operating at low power can operate even with a weak current of several mic apertures or amperes flowing through the clamp circuit, in the present invention, the comparator is clamped.
  • a power supply circuit can be configured using the current thus supplied, and the current flowing through the clamp circuit can be supplied to a comparator and a voltage reference used in the circuit. Also, by using an electronic switch having a large input resistance such as a MOS transistor, the electronic switch can be sufficiently controlled by this comparator.
  • the reference circuit REF supplies a reference voltage to the comparator CP
  • FIG. 3 shows examples a to k of the configuration of the reference circuit REF.
  • the configuration of a to i may be a configuration such that j and k are insulated from GND, and a configuration such that kcc and V cc are equal to V ref .
  • the features exhibited by each configuration and the case where the configurations a to k are applied to the reference circuit 13 of FIG. 1 will be understood by those skilled in the art and will not be described in detail.
  • the rectifier receives an alternating current as shown in Fig. 4a.
  • the output voltage of the rectifier when the resistance of the load, the minimum value is maximum is substantially equal pulsating to the maximum value of the input voltage 0 ( Figure 4 b of V P, V N).
  • a pulsating current with a maximum value of about 140 V is obtained. Due to the relationship between V P and V N
  • the clamping action of the circuit is defined, and ICL flows as shown in Figure 4d. Thus I. Normally, current flows periodically as shown in Fig. 4d.
  • V o (t) V ref * exp (-t / CR)
  • Vref is the reference voltage
  • C is the capacitor
  • R is the load resistance.
  • the ripple of the output voltage is determined by the frequency of the AC power supply, the value of the capacitor for smoothing, and the value of the load resistance.
  • the ripple rate is determined by the smoothing capacitor at any AC power frequency and load resistance.
  • an AC input may be directly supplied to the comparator 16 without using the rectifier 12, and the switch circuit 14 may perform a required operation even if the switch circuit 14 does not have the configuration including the comparator 16 and the electronic switch 17.
  • the configuration provided may be provided.
  • the output of the power supply circuit according to the present invention does not necessarily have to be DC.
  • the power supply circuit of the present invention is configured as described above, the commercial AC power supply is rectified, a pulsating current is extracted, and a portion below the reference voltage is cut therefrom by a comparator and an electronic switch, and a smoothing capacitor is obtained.
  • the power supply circuit is a power supply circuit that is charged to a desired voltage, and in one embodiment, is used as an internal power supply of the circuit by using a current of a clamp circuit for overvoltage prevention of a comparator, and has an efficient and simpler configuration. Smaller rule A power supply circuit that operates with lower power consumption can be provided.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

L'invention porte sur un circuit d'alimentation électrique produisant une tension désirée en redressant le courant de l'alimentation en courant alternatif du réseau extérieur afin de générer un courant impulsionnel, en coupant la partie inférieure à une tension de référence au moyen d'un comparateur et d'un commutateur électronique et en chargeant ensuite un condensateur. Selon une réalisation, le courant d'un circuit de blocage de prévention des surtensions du comparateur est utilisé comme alimentation électrique interne pour le circuit, ce qui permet d'utiliser un courant excédentaire autre que résiduaire comme la chaleur. L'invention porte également sur un circuit d'alimentation courant alternatif/courant continu, un circuit plus petit mis à l'échelle et une consommation de courant inférieure.
PCT/JP2001/001319 2000-02-25 2001-02-22 Circuit d'alimentation electrique WO2001063737A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU34133/01A AU3413301A (en) 2000-02-25 2001-02-22 Power supply circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-50260 2000-02-25
JP2000050260 2000-02-25

Publications (1)

Publication Number Publication Date
WO2001063737A1 true WO2001063737A1 (fr) 2001-08-30

Family

ID=18572065

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/001319 WO2001063737A1 (fr) 2000-02-25 2001-02-22 Circuit d'alimentation electrique

Country Status (2)

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AU (1) AU3413301A (fr)
WO (1) WO2001063737A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3206290A1 (fr) * 2016-02-10 2017-08-16 ecoTEC-Energy Vertriebs-GmbH Alimentation sans transformateur, en particulier pour des systèmes d'éclairage del

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09215328A (ja) * 1996-01-26 1997-08-15 Nagano Japan Radio Co スイッチング電源装置
JPH10301644A (ja) * 1997-04-25 1998-11-13 Victor Co Of Japan Ltd 電源装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09215328A (ja) * 1996-01-26 1997-08-15 Nagano Japan Radio Co スイッチング電源装置
JPH10301644A (ja) * 1997-04-25 1998-11-13 Victor Co Of Japan Ltd 電源装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3206290A1 (fr) * 2016-02-10 2017-08-16 ecoTEC-Energy Vertriebs-GmbH Alimentation sans transformateur, en particulier pour des systèmes d'éclairage del

Also Published As

Publication number Publication date
AU3413301A (en) 2001-09-03

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