CN1165954A

CN1165954A - Current sensor

Info

Publication number: CN1165954A
Application number: CN 96102240
Authority: CN
Inventors: 介国安
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-05-17
Filing date: 1996-05-17
Publication date: 1997-11-26

Abstract

A current sensor is made up by winding conductive wine around the single-sheet or multi-sheel magnetic iron core. When the current sensor is fixed close to or on the conducting wire or conductor which alternative current flow through, an AC signal that is linearly proportional to the alternative current is induced across the winding and after amplified, it is passed to meter or autocontrol system for measuring the current or automatical control. Multiple sensors can be used to constitute different types of current sensor. Its advantages are small size, high precision and easy interface.

Description

AC current sensor

The present invention relates to fields such as power supply, electricity consumption, automatic control, be used for current measurement, particularly current transformer.

Current transformer is to utilize the principle of transformer to make, and it can become little electric current with big electric current, according to different current ratios measure, metering etc.Be widely used in fields such as power supply, electricity consumption and automatic control.Have reasons such as leakage field, eddy current, magnetic saturation owing to current transformer, thus the current measurement precision be difficult to be improved, and volume, weight all are difficult to realize miniaturization.

The objective of the invention is on the basis of existing current transformer, to increase a kind of current sensor of novel miniaturization, can replace current transformer in some occasion.

Basic structure of the present invention is that lead is wound on the iron core of monolithic or multi-disc silicon steel sheet (or other magnetic conduction sheet) formation, forms current sensor.The core configuration of sensor is a rectangle, square or other shape, and its magnetic circuit all is in open circuit or intermittently closed circuit, and size is according to test environment, precision or actual needs and decide, the umber of turn on the iron core is decided according to voltage signal is big or small.Principle of work is current sensor to be fixed or approaching passing through on the lead or conductor of alternating current, producing around lead or the conductor has electromagnetic field, the winding A of sensor, B two ends will induce and the alternating voltage that passes through lead or the linear ratio of conductor alternating current.Again ac voltage signal is amplified or mould/number conversion, promptly can be used for various instrument and meters or automatic control system etc.The present invention can also evenly distribute a plurality of current sensors and constitute the current sensor of dissimilar and different size such as planar shaped, garden shape, square, rectangle, flute profile.Form the planar shaped current sensor by one or more current sensors, winding is connected in series end to end in order, the plastic skeleton of packing into is vertically fixed on the planar shaped current sensor on the conducting plane that is connected with alternating current during use.Evenly distribute by a plurality of current sensors and to form garden shape current sensor, with winding end to end in order the serial connection garden of packing into mould in the material skeleton, garden shape current sensor is enclosed within on the lead that is connected with alternating current during use.Evenly distribute by a plurality of current sensors and to form the rectangle current sensor, with winding end to end in order serial connection pack in the rectangle plastics skeleton, be enclosed within during use on the banded or tabular conductor circuit of power supply.Evenly distribute by a plurality of current sensors and to form the flute profile current sensor, with winding end to end in order serial connection pack in the flute profile plastic skeleton, be clipped in during use on the tabular conductor circuit of power supply.Form the suspension type current sensor by single or multiple current sensors, the position with the electric power conductor certain distance is hung or is fixed in being connected in series in order end to end in the plastic skeleton of packing into of winding during use.Form as the current sensor of other shape such as square, half garden shape by single or multiple current sensors.

It is little, in light weight that the present invention has a volume than current transformer in the past, the precision height, and good linearity, with digital watch, computer charges, and interfaces such as computer control are convenient, as are used for the motor protection system and will improve the protection precision greatly.In power supply, electricity consumption and automatic control system field, development prospect is preferably arranged.

Below in conjunction with description of drawings

Fig. 1 fundamental form current sensor structure principle chart

Fig. 2 planar shaped current sensor structure principle chart

Fig. 3 garden shape shape current sensor structure principle chart

Fig. 4 rectangle current sensor structure principle chart

Fig. 5 flute profile current sensor structure principle chart

Fig. 6 suspension type current sensor structure principle chart

With reference to Fig. 1. be the fundamental form current sensor, a winding technique arranged on monolithic or multi-disc iron core, the skeleton of packing into is fixed on conductor or the lead, constitutes current sensor.When conductor or lead during by alternating current, induce voltage signal on the winding of sensor with the linear ratio of alternating current, to can directly connect after this signal amplification, or connect, reach electric current indication or automatic control etc. with computer and automatic control system with instrument and meter.

With reference to Fig. 2. the serial connection in order end to end of, its winding evenly distributed by three current sensors, the skeleton of packing into is formed the planar shaped current sensor.During use sensor is fixed on strip or the plate-shaped conductors.

With reference to Fig. 3. be to be evenly arranged into garden shape by eight current sensors, the serial connection in order end to end of each winding, the skeleton of packing into is formed garden shape current sensor, is enclosed within on the lead during use.

With reference to Fig. 4. be by eight evenly distributed rectangularities of current sensor, being connected in series in order end to end of each winding is enclosed within outside strip or the tabular conductor during use of the skeleton of packing into composition rectangle current sensor.

With reference to Fig. 5. be to be evenly arranged into flute profile by seven current sensors, the serial connection in order end to end of each winding, the skeleton of packing into is formed the flute profile sensor, is clipped in during use on banded or the tabular conductor.

With reference to Fig. 6. form the suspension type current sensor by the current sensor skeleton of packing into, hang or be fixed on position during use with the electric power conductor certain distance.

Claims

1, current sensor, it is characterized in that lead is wound on the iron core of monolithic or multi-disc silicon steel sheet (or other magnetic conduction sheet) formation, form current sensor, the core configuration of sensor is a rectangle, square or other shape, its magnetic circuit is in open circuit or intermittently closed circuit, size is according to test environment, precision or actual needs and decide, circuit sensor is fixed on the lead or conductor by alternating current, winding A, the AC signal that the B two ends induce is and the linear ratio of alternating current of passing through lead or conductor, this signal connects various instrument and meters and automatic control system through amplification, can constitute planar shaped by the even distribution of two or more current sensors, garden shape, rectangle, square, the current sensor of dissimilar and different size such as flute profile.

2, according to the said current sensor of claim 1, it is characterized in that being connected in series in order end to end by the evenly distributed winding of one or more current sensors, the skeleton of packing into is formed the planar shaped current sensor, be fixed on banded or the tabular conductor, extension line AB two end signals are through interfaces such as amplification and instrument and meter and automatic control systems.

3, according to the said current sensor of claim 1, it is characterized in that being evenly arranged into garden shape by a plurality of current sensors, winding is connected in series end to end in order, the skeleton of packing into is formed garden shape current sensor, be enclosed within on lead or the conductor, extension line A, B two end signals are through interfaces such as amplification and instrument and meter and automatic control systems.

4, according to the said current sensor of claim 1, it is characterized in that by the evenly distributed rectangularity of a plurality of current sensors, winding is connected in series end to end in order, the skeleton of packing into is formed the rectangle current sensor, be enclosed within on strip, band shape or the tabular conductor, extension line A, B two end signals are through amplification and instrument and meter and automatic control system interface.

5, according to the said current sensor of claim 1, it is characterized in that a plurality of current sensors are evenly arranged into flute profile, winding is connected in series end to end in order, the skeleton of packing into is formed the flute profile current sensor, be clipped on banded or the tabular conductor, extension line A, B two end signals are through amplification and instrument and meter and automatic control system interface.

6, according to the said current sensor of claim 1, it is characterized in that being connected in series the skeleton of packing into end to end in order by its winding of one or more current sensors forms the suspension type current sensor, hang or be fixed on the position with the electric power conductor certain distance, extension line A, B two end signals are through amplification and instrument and meter and automatic control system interface.

7,, it is characterized in that to form the current sensor of multiple shapes such as square, half garden shape by the even distribution of a plurality of current sensors according to the said current sensor of claim 1.