CN1681055A

CN1681055A - Energy-saving current mutual inductor with hollow coil

Info

Publication number: CN1681055A
Application number: CN 200410079054
Authority: CN
Inventors: 陈汝清
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-27
Filing date: 2004-09-27
Publication date: 2005-10-12
Anticipated expiration: 2024-09-27
Also published as: CN1681055B

Abstract

In insulating case, the second coil winding winds on the loop type plastic tubing support, iron core of silicon sheet is wound by secondary coil winding. The DC stabilized voltage supply is outputted by end three. Two coils are placed side by side and with same direction at same insulating plastic case. After making electrical connection, it will be sealed with epoxy resin.

Description

Energy-conservation, novel current mutual inductor with hollow coil

Affiliated technical field

Patent of the present invention relates to the testing apparatus of current change in a kind of induction power circuit.Especially can discern energy-conservation, the novel current mutual inductor with hollow coil of the current change in the power circuit.

Background technology:

At present, known current transformer structure be by: in the attached data, plastic casing by the ring-like silicon sheet core of core technology technology, wrap in the outer insulating barrier of ring-like silicon sheet core, secondary enameled wire loops, secondary enameled wire loop binding post etc. outside insulating barrier are formed.Power bus-bar row is by the central hole of current transformer, and the secondary connection post connects the indication ammeter, generally does control, protection, measures usefulness.After power line passes through primary current, sense the corresponding magnitude of current at secondary coil, on ammeter, show.When the current transformer of general big electrorheological ratio passes through rated current at a power line, consumed power at the loaded line of secondary coil winding and ammeter will reach 5～40VA, the heating of current transformer, make the power distribution cabinet and the instrument volume of assembling bigger, be unfavorable for the microminiaturization of instrument, standardization.The quality quality of while silicon sheet core, when primary current surpassed rated current, saturated phenomenon appearred in the electric current in the secondary load, and promptly when primary current continued to rise, secondary current was in saturation condition, directly influences the accuracy and the sensitivity of data.

Summary of the invention:

In order to overcome existing current transformer when big electrorheological compares, when current transformer passes through rated current at a power line, make the instrument transformer heating in the consumed power of the loaded line of secondary coil winding and ammeter, make the power distribution cabinet and the instrument volume of assembling bigger, be unfavorable for the microminiaturization of instrument, standardization.The quality quality of while silicon sheet core, when primary current surpassed rated current, saturated phenomenon appearred in the electric current in the secondary load, and promptly when primary current continued to rise, secondary current was in saturation condition, directly influences the accuracy and the sensitivity of data.

Patent of the present invention solves the technical scheme that its technical problem adopts: in insulation crust, 1. by on the ring-like plastic pipe support of core technology technology around the secondary enameled wire loop of some, make secondary enameled wire loop winding, two connector lugs are welded on respectively on two binding posts, wherein a binding post connects an end of a 20K Ω standard resistor, one binding post of the digital display type A.C. voltmeter of another termination of resistance one high sensitivity 200mV, another binding post of another binding post and secondary coil winding joins, when an electric power busbar passes energy-conservation, after the central hole of novel current mutual inductor with hollow coil, after power line passes through primary current, sense the corresponding magnitude of current at secondary coil, the magnitude of voltage that shows corresponding proportion on the digital display type A.C. voltmeter of high sensitivity 200mV reaches the purpose of the electric current of a power circuit of indication.2. utilize conventional silicon sheet core coil current instrument transformer when primary current surpasses design current, saturated phenomenon appears in the electric current in the secondary load, promptly when primary current continues to rise, secondary current is in the characteristic of saturation condition, because general iron core all has coercive force to exist, so magnetic flux surge, behind the core sataration, may in iron core, cause very big remanent magnetism, before this remanent magnetism is not by the operating current degaussing, to make current transformer increase error, so cut a slit at ring-like silicon sheet core correct position, to improve magnetic structure, eliminate remanent magnetism, by changing the various combination technique data and the technological process of silicon sheet core coil, make secondary output current and volume controlled need the workplace of power supply for digital display type A.C. voltmeter or other at the fixing output of the three ends positive voltage integrated regulator D.C. regulated power supply of applicable technology claimed range.Hollow coil and silicon sheet core coil are side by side, in the equidirectional plastic casing that is placed on same insulation, use epoxy encapsulation.

The beneficial effect of patent of the present invention is: can be when the test measured object is electric current, the defective and the deficiency of primary current instrument transformer have been improved,, simple in structure in the entire product structure only increasing the fixing output of three ends positive voltage integrated regulator D.C. regulated power supply on former two kinds of current transformer bases, when testing, increasing resistance and digital display type voltmeter.

Description of drawings:

Each embodiment further specifies patent of the present invention below in conjunction with accompanying drawing:

Fig. 1 is the vertical section core technology technical construction circuit theory diagrams of conventional current instrument transformer.

Fig. 2 is vertical section core technology technical construction circuit theory diagrams energy-conservation, novel current mutual inductor with hollow coil.

Fig. 3 is the side sectional structural map of combination back product.

Fig. 4 is the vertical view of combination back product.

Fig. 5 is the circuit theory diagrams of the fixing output of three ends positive voltage integrated regulator D.C. regulated power supply.

Accompanying drawing is the measured data comparison diagram of two kinds of current transformers in addition.

1. power line perforation centers among Fig. 1, Fig. 2,2.3.8.9. the secondary coil winding is drawn the end of a thread, 4. ring-like silicon sheet core, 5. Jue Yuan plastic casing, 6. wrap in the outer insulating barrier of silicon sheet core, the 10. ring-like plastic pipe support of hollow insulation, 7.11. secondary enameled wire loop, 12. top cover, 13. slits.

Embodiment:

Among Fig. 2, the ring-like plastic pipe support of the inherent core technology technology of plastic casing (5) (10) is gone up secondary enameled wire loop (11) around some, is made secondary enameled wire loop winding, two connector lugs scrape off enamelled coating and are welded on respectively on two binding posts (8.9), wherein a binding post (8) connects an end of a 20K Ω standard resistor, one binding post of the digital display type A.C. voltmeter of another termination of resistance one high sensitivity 200mV, another binding post of another binding post and secondary coil winding joins; Utilize conventional silicon sheet core current transformer: plastic casing (5) the ring-like silicon sheet core of inherent core technology technology (4), wrap in the outer insulating barrier (6) of silicon sheet core, secondary enamel-cover line chart (7) outside insulation, secondary coil binding post (2.3) is connected on respectively on 2 of the VS, when primary current surpasses design current, saturated phenomenon appears in the electric current in the secondary load, promptly when primary current continues to rise, secondary current is in the characteristic of saturation condition, because general iron core all has coercive force to exist, so magnetic flux surge, behind the core sataration, may in iron core, cause very big remanent magnetism, before this remanent magnetism is not by the operating current degaussing, to make current transformer increase error, so cut a slit at ring-like silicon sheet core correct position, to improve magnetic structure, eliminate remanent magnetism, by changing the various combination technique data and the technological process of silicon sheet core coil, make secondary output current and volume controlled need the workplace of power supply for digital display type A.C. voltmeter or other at the fixing output of the three ends positive voltage integrated regulator D.C. regulated power supply of applicable technology claimed range.Hollow coil (10) and silicon sheet core coil (4) are side by side, in equidirectional plastic housing (5) body that is placed on same insulation, connect An Tu Even and to use epoxy encapsulation after finishing.Pass the central hole of energy-conservation, novel current mutual inductor with hollow coil as power bus-bar row after, after power line passes through primary current, sense the corresponding magnitude of current at secondary coil, the magnitude of voltage that shows corresponding proportion on the digital display type A.C. voltmeter of high sensitivity 200mV reaches the purpose of the electric current of a power circuit of indication.

Claims

1. the automatic control equipment that can discern current change in the power circuit---energy-conservation, novel current mutual inductor with hollow coil, in insulation crust, in core technology technology---on the ring-like plastic pipe support of hollow insulation around a given data enamelled wire, make the secondary coil winding, two connector lugs are welded on respectively on two binding posts, connect An Shun Xu Even; Utilize conventional silicon sheet core coil current instrument transformer: plastic casing is interior by the ring-like silicon sheet core of core technology technology, wrap in the outer insulating barrier of silicon sheet core, secondary enameled wire loop outside insulating barrier, the secondary coil binding post, be connected on respectively on 2 of the VS, make secondary output current and volume controlled need the workplace of power supply for digital display type A.C. voltmeter or other at the fixing output of the three ends positive voltage integrated regulator D.C. regulated power supply of applicable technology claimed range, hollow coil and silicon sheet core coil are side by side, equidirectional interior of plastic casing that is placed on same insulation connects the back epoxy encapsulation that finishes An Tu Even, it is characterized in that: in insulation crust, in core technology technology---on the ring-like plastic pipe support of hollow insulation around a given data secondary enameled wire loop, two connector lugs are welded on respectively on two binding posts, and two binding posts connect with outer Ce examination Dian Lu Even; Utilize conventional silicon sheet core coil current instrument transformer to provide secondary output current and volume controlled to supply digital display type A.C. voltmeter or other power supplys that needs, reach the purpose of the electric current variation that can independently discern a power circuit at the D.C. regulated power supply of the fixing output of the three ends positive voltage integrated regulator of applicable technology claimed range.

2. energy-conservation, novel current mutual inductor with hollow coil according to claim 1 is characterized in that: by actual no-load voltage ratio data demand, secondary coil is wound on the ring-like plastic pipe support of insulation.

3. energy-conservation, novel current mutual inductor with hollow coil according to claim 1, it is characterized in that: by actual no-load voltage ratio data demand, on the insulating barrier that secondary coil closes around the ring-like silicon sheet core of outsourcing insulation, the silicon sheet core current transformer provides secondary output current and volume controlled at the fixing output of the three ends positive voltage integrated regulator D.C. regulated power supply of applicable technology claimed range, supplies the needed power supply of digital display type A.C. voltmeter.

4. energy-conservation, novel current mutual inductor with hollow coil according to claim 1, it is characterized in that: the fixing output of three ends of applicable technology claimed range positive voltage integrated regulator D.C. regulated power supply, hollow coil and silicon sheet core coil are side by side, in the equidirectional plastic casing that is placed on same insulation, connect An Tu Even and to use epoxy encapsulation after finishing.

5. energy-conservation, novel current mutual inductor with hollow coil according to claim 1 is characterized in that: 200mV digital display type AC current transformer top secondary lead wires is near position again.

6. energy-conservation, novel current mutual inductor with hollow coil according to claim 1 is characterized in that: cut a slit at the silicon sheet core correct position.