WO2001008289A1 - Procede et appareil d'alimentation en courant quasi stable et tension quasi constante d'equipements a courant alternatif et appareil associe - Google Patents

Procede et appareil d'alimentation en courant quasi stable et tension quasi constante d'equipements a courant alternatif et appareil associe Download PDF

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Publication number
WO2001008289A1
WO2001008289A1 PCT/CN1999/000096 CN9900096W WO0108289A1 WO 2001008289 A1 WO2001008289 A1 WO 2001008289A1 CN 9900096 W CN9900096 W CN 9900096W WO 0108289 A1 WO0108289 A1 WO 0108289A1
Authority
WO
WIPO (PCT)
Prior art keywords
load
voltage
quasi
current
connect
Prior art date
Application number
PCT/CN1999/000096
Other languages
English (en)
Chinese (zh)
Inventor
Lifa Yuan
Original Assignee
Guangdong Provincial Special Economic Zones Industry Co. Ltd.
Great Sino Industries Limited
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
Priority to CN98100357A priority Critical patent/CN1058817C/zh
Application filed by Guangdong Provincial Special Economic Zones Industry Co. Ltd., Great Sino Industries Limited filed Critical Guangdong Provincial Special Economic Zones Industry Co. Ltd.
Priority to AU48948/99A priority patent/AU4894899A/en
Priority to PCT/CN1999/000096 priority patent/WO2001008289A1/fr
Publication of WO2001008289A1 publication Critical patent/WO2001008289A1/fr

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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/06—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using impedances
    • H02M5/08—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using impedances using capacitors only
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/257—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only

Definitions

  • the present invention relates to the field of power supply devices for alternating current electrical appliances, and in particular, to a method and device for controlling power supply of alternating current electrical appliances with quasi-constant current and quasi-constant voltage.
  • the common protection method is to add a fuse, but due to the deviation of the fuse value and the lag action, the accident may have been caused before the fuse is blown. It can be seen from the above examples of the two types of electrical appliances that their shortcomings and problems are multifaceted, and a method that can comprehensively solve these problems is needed.
  • the object of the present invention is to provide a method and a device for controlling the power supply of an alternating current electrical appliance with quasi-constant current or quasi-constant voltage.
  • This method and device can avoid working conditions that affect its life extension, so that it does not cause serious consequences caused by failures. It is safe, reliable, simple, and inexpensive, enabling some electrical appliances to work under energy-saving and efficient conditions.
  • the quasi-constant current or quasi-constant voltage referred to here means that the current or voltage provided to the consumer is constant in the engineering sense, that is, its variation is within the allowable specified range.
  • the technical solution of the present invention is a method for controlling power supply of alternating current appliances with quasi-constant current, which is characterized by:
  • a quasi-constant voltage control method for power supply of alternating current electrical appliances which is characterized by:
  • a quasi-constant current or quasi-constant voltage controlled AC power supply device is characterized in that: a normally closed switch is connected in parallel at both ends of an electrical device to form a load component, at least one of the above load components is connected in series with each other, and has a capacitance
  • the devices of C are formed in series.
  • the impedance triangle of the circuit when resistive load is shown in Figure 2a, and the corresponding voltage triangle is shown in Figure 2b. Its three sides correspond to the grid voltage U ⁇ and the capacitor terminal voltage t / e. , And load voltage, the switch K in Figure 1 is a normally closed switch, that is, the load is closed when it is not working.
  • the device of the present invention having the capacitor with the capacitance determined by the above formula can ensure that the loop current changes from / ⁇ to when the load resistance value changes from 0 to R (ie, from short circuit to full load). 1 ⁇ At this time, the load power changes from 0 to W R , and the current change does not exceed the allowable percentage. Increasing the load power of the device of the present invention under the condition of the set capacitor will not further increase the current. This is the watt limiting function of the device of the present invention. This function of limiting the amount of power supply current is very useful for line safety.
  • the capacitance value of the capacitor is selected to constitute the quasi-constant current device of the present invention.
  • the device of the present invention is quasi-constant current and quasi-constant voltage.
  • the load resistance value of a quasi-constant current device of the present invention with a determined capacitance value continues to increase. This device will operate beyond the quasi-constant current area. At this time, the loop current does not meet the quasi-constant current and is less than the quasi-constant current value.
  • the load resistance will be the starting point for entering the quasi-constant voltage zone. As long as the actual load current of the consumer is less than this value, the consumer can produce the same function as when used in the actual power grid. The difference is that the consumer is actually protected against short circuits.
  • each of these loads can be low-voltage, and for low-voltage electrical appliances, the transformer can be omitted and used directly in the utility power grid to reduce costs and eliminate the losses of the voltage-reducing device.
  • the device of the present invention can be applied to appliances with different voltage levels in various countries.
  • the device of the present invention is free from harmonic pollution generated when other constant current or constant voltage devices work.
  • the device of the present invention has a capacitive impedance, which has a certain compensation effect on the power factor of the power grid, which is more in-situ compensation than the general method of in-situ compensation in residential quarters or large consumers.
  • the device Compared with the general constant current or constant voltage device, the device itself has extremely low losses, which can be ignored, so there is no heat generation, it is not easy to damage, it works reliably, and it is very light. 7.
  • the device of the present invention When the device of the present invention is used, no spark occurs when the load and cut load meet certain set conditions, which is very advantageous for places that require special attention to safety in coal mines and petrochemical industries.
  • the huge explosion-proof explosion-proof devices can be completely omitted, saving investment. , Light use, safe and reliable.
  • FIG. 1 is a schematic diagram of a circuit configuration of the present invention
  • Figures 2a and b are triangle vector diagrams of the circuit impedance and voltage when the device of the present invention is in a resistive load;
  • Figure 3 is a graph of the relationship between load current and load resistance in a quasi-constant current region;
  • Figure 4 is the relationship between the load terminal voltage and load resistance in the quasi-constant voltage region.
  • FIG. 5 is a schematic circuit diagram of a first embodiment of the present invention.
  • FIG. 7 is a schematic circuit diagram of a second embodiment of the present invention.
  • Figures 9a, b are examples of capacitor combinations.
  • FIG. 5 is a first embodiment of the present invention. It is an example of a quasi-constant current device.
  • Allowable percentage change of given current ⁇ , ⁇ ⁇ ?- ⁇ ⁇ mains voltage ⁇ volt, frequency 5 Hz.
  • a capacitor of 67 microfarads can be used to provide a maximum of 8 12V 50W tungsten halogen lamps.
  • any number of lamps can be used (from one unused to a maximum of 8).
  • the current change does not exceed 10%.
  • the current when all 8 lamps are connected is set to ⁇ / ⁇ , this current is again quantified by the rated current of the lamp / ⁇ 3 ⁇ 4 /. If the number of lamps connected is less than 8, the current will be Slight increase, that is, the current flowing in the running lamp will exceed the rated value calculated based on its power. In order to prevent any lamp from flowing current exceeding its rated value under any use conditions, the capacitance value can be selected. The value can be achieved at a slightly lower value than its real power. This is a common design technique, which is easy to understand and need not be described in detail.
  • Low-pressure tungsten halogen lamps originally have high light efficiency and long life, and have superior light-emitting characteristics than fluorescent lamps. There is no voltage-reducing device and the loss and failure probability caused by them. Therefore, it meets energy-saving and environmental protection requirements. It can be designed to have no sparks and no current impact when switching on and off. It is safe and long life. Short-circuiting any one lamp does not have dangerous consequences. Due to the low operating voltage of the load, it is also superior in terms of protection against electric shock.
  • Fig. 7 is a second embodiment of the present invention, and shows an example in which a television set is operated as a load in a quasi-constant voltage region in the device of the present invention.
  • a capacitor of 40 microfarads is added according to the solution of the invention (:, adding a small cost so that the television is already under the condition of short circuit protection, which is achieved by the current limiting function of the device of the invention, even if the television A short circuit of the power supply will not cause an explosion accident, nor will it further burn other components, nor will it affect the safety of the power grid due to the failure of the TV set.
  • the device in this example has no impact on the current of the TV set when it is turned on. It has a significant effect on extending the life of the picture tube and related components.
  • the capacitor used in the device of the present invention may be a combination of a plurality of capacitors connected in series and parallel.
  • Figures 9a and b are two examples, and a tap line can be drawn from each of the series and parallel nodes to obtain multiple terminals with multiple differences.
  • the capacitance is adapted to a variety of quasi-constant current or quasi-constant voltage requirements, which are easily understood by those skilled in the art, and need not be described in detail.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne une boucle de courant formée d'un élément de charge se composant d'une charge montée en parallèle avec un interrupteur (K) et d'un élément de condensateur (C) monté en série de manière à allumer l'interrupteur (K) pour effectuer une mise en charge. La boucle de courant possède un courant de charge ou une tension terminale maintenant les propriétés de courant quasi stable ou de tension quasi constante ne dépassant pas un pourcentage prédéterminé de variation d'amplitude. L'appareil faisant intervenir ce système d'alimentation est facile à fabriquer, peu coûteux, exempt d'ondes harmoniques et fait preuve de pertes extrêmement réduites. Les nombreuses fonctions qu'il offre permettent de protéger la boucle des courts-circuits et des surcharges, de mettre en route des appareils électriques basse tension dans un réseau électrique haute tension, d'éviter, lors de la mise sous tension, les pannes des appareils électriques dues à un courant de surtension de manière à prolonger leur durée de vie. L'appareil possède encore un coefficient de puissance de compensation et lors de la mise en marche ou de l'arrêt, il n'y a pas risque d'étincelles assurant ainsi une protection contre l'explosion.
PCT/CN1999/000096 1998-01-21 1999-07-21 Procede et appareil d'alimentation en courant quasi stable et tension quasi constante d'equipements a courant alternatif et appareil associe WO2001008289A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN98100357A CN1058817C (zh) 1998-01-21 1998-01-21 准恒定电流、电压控制交流电负载装置
AU48948/99A AU4894899A (en) 1999-07-21 1999-07-21 Method for supplying quasi-constant current, quasi-constant voltage to ac electric applications and apparatus of the same
PCT/CN1999/000096 WO2001008289A1 (fr) 1998-01-21 1999-07-21 Procede et appareil d'alimentation en courant quasi stable et tension quasi constante d'equipements a courant alternatif et appareil associe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN98100357A CN1058817C (zh) 1998-01-21 1998-01-21 准恒定电流、电压控制交流电负载装置
PCT/CN1999/000096 WO2001008289A1 (fr) 1998-01-21 1999-07-21 Procede et appareil d'alimentation en courant quasi stable et tension quasi constante d'equipements a courant alternatif et appareil associe

Publications (1)

Publication Number Publication Date
WO2001008289A1 true WO2001008289A1 (fr) 2001-02-01

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PCT/CN1999/000096 WO2001008289A1 (fr) 1998-01-21 1999-07-21 Procede et appareil d'alimentation en courant quasi stable et tension quasi constante d'equipements a courant alternatif et appareil associe

Country Status (2)

Country Link
CN (1) CN1058817C (fr)
WO (1) WO2001008289A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9332937B2 (en) 2000-06-01 2016-05-10 Georgetown University Systems and methods for monitoring health and delivering drugs transdermally

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1058817C (zh) * 1998-01-21 2000-11-22 广东省经济特区实业有限公司 准恒定电流、电压控制交流电负载装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2087413U (zh) * 1990-11-26 1991-10-23 赵宏生 自控夜光器
JPH10294185A (ja) * 1997-04-17 1998-11-04 Koito Ind Ltd 定電流光度調整装置
CN1224271A (zh) * 1998-01-21 1999-07-28 广东省经济特区实业有限公司 准恒定电流、电压控制交流电负载装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2040281U (zh) * 1988-12-19 1989-06-28 王金元 电器节能调压装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2087413U (zh) * 1990-11-26 1991-10-23 赵宏生 自控夜光器
JPH10294185A (ja) * 1997-04-17 1998-11-04 Koito Ind Ltd 定電流光度調整装置
CN1224271A (zh) * 1998-01-21 1999-07-28 广东省经济特区实业有限公司 准恒定电流、电压控制交流电负载装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9332937B2 (en) 2000-06-01 2016-05-10 Georgetown University Systems and methods for monitoring health and delivering drugs transdermally

Also Published As

Publication number Publication date
CN1058817C (zh) 2000-11-22
CN1224271A (zh) 1999-07-28

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