CN107068370A - E types transformer and safety alarm device - Google Patents
E types transformer and safety alarm device Download PDFInfo
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- CN107068370A CN107068370A CN201710477883.9A CN201710477883A CN107068370A CN 107068370 A CN107068370 A CN 107068370A CN 201710477883 A CN201710477883 A CN 201710477883A CN 107068370 A CN107068370 A CN 107068370A
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- coil
- magnetic core
- alarm
- shaped iron
- iron cores
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
- H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/20—Measuring number of turns; Measuring transformation ratio or coupling factor of windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
Abstract
The present invention provides a kind of E types transformer and safety alarm device, is related to transformer technology field, wherein, E types transformer includes primary coil, secondary coil and E shaped iron cores；E shaped iron cores include：One horizontal magnetic core and three longitudinal magnetic cores；Three longitudinal magnetic cores are separately positioned on the two ends and centre position of horizontal magnetic core；The end that longitudinal magnetic core in centre position is connected with horizontal magnetic core is arranged on, adjusting knob is provided with；Rotation of adjustment knob can make longitudinal flux core extend along direction to stretch, the number of turn of longitudinal magnetic core coil is wound in adjust；Primary coil and secondary coil are respectively wound around the magnetic core of E shaped iron cores.E types transformer provided by the present invention, can neatly change the winding of transformer, so as to change ac output voltage, meet demand of the circuit to many time variant voltages.
Description
Technical field
The present invention relates to transformer technology field, more particularly, to a kind of E types transformer and safety alarm device.
Background technology
Transformer (Transformer) is the device for changing alternating voltage using the principle of electromagnetic induction, main member
It is primary coil, secondary coil and iron core (magnetic core).Major function has：Voltage transformation, current transformation, impedance are converted, isolated, surely
Press (magnetic saturation transformer) etc..It can be divided into by core structure：C-type transformer, E types transformer, R type transformers etc..
Wherein, E types transformer manufacturing technique is simple, advantage of lower cost, the coil matched due to lamination and with it
Skeleton has formed series and largely produced, therefore application is quite varied.
In practical application, generally by changing the coil turn on magnetic core, change voltage, the purpose of electric current are reached, but
The maximum of the coil turn of coiling is fixed on the magnetic core of old-fashioned E types transformer, therefore, maximum more than coil turn
During value, old-fashioned E types transformer tends not to neatly change voltage, electric current, for needing the flexible circuit for changing voltage, electric current
For, the application of old-fashioned E types transformer has certain limitation.
The content of the invention
In view of this, can be neatly it is an object of the invention to provide a kind of E types transformer and safety alarm device
Change the winding of transformer, so as to change voltage, electric current meets demand of the circuit to many time variant voltages.
In a first aspect, the embodiments of the invention provide a kind of E types transformer, including primary coil, secondary coil and E sections
Core；
Wherein, E shaped iron cores include：One horizontal magnetic core and three longitudinal magnetic cores；
Three longitudinal magnetic cores are separately positioned on the two ends and centre position of horizontal magnetic core；
The end that longitudinal magnetic core in centre position is connected with horizontal magnetic core is arranged on, adjusting knob is provided with；
Rotation of adjustment knob can make longitudinal flux core extend along direction stretch, with adjust be wound in longitudinal magnetic core coil
The number of turn；
Primary coil and secondary coil are respectively wound around the magnetic core of E shaped iron cores.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the first of first aspect, wherein, just
Level coil and secondary coil are respectively wound around the magnetic core at E shaped iron cores two ends.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of second of first aspect, wherein, just
Two parts of level coil are respectively wound around the magnetic core at E shaped iron cores two ends, and two parts of secondary coil are respectively wound around E shaped iron cores two
The magnetic core at end.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the third of first aspect, wherein, also
Including the first coil and the second coil for isolating clutter, and first coil and the second coil are wrapped in the middle of E shaped iron cores
Magnetic core.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 4th of first aspect kind, wherein, if
Put longitudinal magnetic core at two ends and be also equipped with adjusting knob with the end that horizontal magnetic core is connected, rotation of adjustment knob can make longitudinal direction
Magnetic core extends along direction and stretched, to adjust the number of turn for being wound in magnetic core coil.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 5th of first aspect kind, wherein, just
Level coil and secondary coil are all connected to coil turn tester；
Display screen is provided with coil turn tester, in real time the number of turn of display coil.
Second aspect, the embodiment of the present invention additionally provides a kind of safety alarm device, including induction coil, alarm chip,
Alarm and E type transformers as described in relation to the first aspect；
Induction coil is used to connect with the primary coil of E type transformers, and produces induced signal；
The secondary coil connection ac output end of E type transformers；
Alarm chip receives induced signal, when induced signal exceeds preset value, alarm chip output alarm enabling signal；
Alarm receives alarm enabling signal, and sends alarm according to alarm enabling signal.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of the first of second aspect, wherein, report
Alert chip includes comparing unit and trigger element；
Comparing unit receives induced signal, and induced signal is compared with preset value；
When induced signal exceeds preset value, trigger element output alarm enabling signal.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of second of second aspect, wherein, report
Filter capacitor is connected between alert chip and induction coil.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of the third of second aspect, wherein, report
Alarm device includes buzzer siren and/or visual alarm.
Technical scheme provided in an embodiment of the present invention brings following beneficial effect：E types provided in an embodiment of the present invention become
In depressor, including primary coil, secondary coil and E shaped iron cores, wherein, E shaped iron cores include：One horizontal magnetic core and three longitudinal directions
Magnetic core；Three longitudinal magnetic cores are separately positioned on the two ends and centre position of horizontal magnetic core；The magnetic core for being arranged on centre position can edge
Its bearing of trend stretches, to adjust the number of turn for being wound in magnetic core coil；Primary coil and secondary coil are respectively wound around E sections
On the magnetic core of core.In the E type transformers that the embodiment of the present invention is provided, by adjusting the stroke of magnetic core, and then change winding
In the number of turn of coil thereon, to realize the purpose for changing voltage, electric current, demand of the circuit to many time variant voltages is met.
Other features and advantages of the present invention will be illustrated in the following description, also, partly be become from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and obtained in accompanying drawing.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 shows a kind of schematic diagram for E types transformer that the embodiment of the present invention one is provided；
Fig. 2 shows a kind of schematic diagram for E types transformer that the embodiment of the present invention one is provided；
Fig. 3 shows a kind of schematic diagram for safety alarm device that the embodiment of the present invention two is provided；
Fig. 4 shows the schematic diagram of alarm chip in a kind of safety alarm device that the embodiment of the present invention two is provided.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Technical scheme be clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
The maximum of the coil turn of coiling is fixed on the magnetic core of current E type transformers, therefore, more than coil
During number of turn maximum, E type transformers tend not to neatly change voltage, electric current, for needing flexible to change voltage, electric current
For circuit, the application of old-fashioned E types transformer has certain limitation.Based on this, E types transformation provided in an embodiment of the present invention
Device and safety alarm device, can neatly change the winding of transformer, so as to change ac output voltage, meet circuit pair
The demand of many time variant voltages.
For ease of understanding the present embodiment, a kind of E types transformer disclosed in the embodiment of the present invention is carried out first
It is discussed in detail.
Embodiment one：
The embodiment of the present invention provides a kind of E types transformer, as shown in figure 1, the E types transformer includes primary coil, secondary
Coil and E shaped iron cores.
Wherein, E shaped iron cores include：One horizontal magnetic core and three longitudinal magnetic cores；Three longitudinal magnetic cores are separately positioned on horizontal stroke
To the two ends and centre position of magnetic core；The end that longitudinal magnetic core in centre position is connected with horizontal magnetic core is arranged on, tune is provided with
Save knob；Rotation of adjustment knob can make longitudinal flux core extend along direction stretch, with adjust be wound in longitudinal magnetic core coil
The number of turn；Primary coil and secondary coil are respectively wound around the magnetic core of E shaped iron cores.
In embodiments of the present invention, E shaped iron cores are made up of a horizontal magnetic core and three longitudinal magnetic cores, in horizontal magnetic core
Two ends and centre position are each provided with a longitudinal magnetic core.Primary coil L1 and secondary coil L2 are respectively wound around E shaped iron cores two
The magnetic core at end.From figure 1 it appears that the primary coil L1 of E type transformers is wrapped on the magnetic core in left side, secondary coil
L2 is wrapped on the magnetic core on right side.The magnetic core for being arranged on centre position is provided with a tune with the end that horizontal magnetic core is connected
Save knob, rotate the adjusting knob can make longitudinal flux core extend along direction stretch, so as to change longitudinal magnetic core coil
The number of turn.
As shown in Fig. 2 in another embodiment, the primary coil L1 of this E type transformers two parts are wound respectively
On the magnetic core at E shaped iron cores two ends, the secondary coil L2 of transformer two parts are respectively wound around the magnetic core at E shaped iron cores two ends
On.And be arranged on longitudinal magnetic core at two ends and be also equipped with adjusting knob with the end that horizontal magnetic core be connected, rotate the regulation and revolve
Button can also equally make longitudinal magnetic core at two ends be stretched, and adjust the size of its stroke, and the magnetic core is wrapped in so as to change
On coil the number of turn.
Specifically, adjusting knob is with the manual manual element turned.Can manual continuous several times rotation, the maximum anglec of rotation
It can reach 360 °；Also position rotating etc. can be done.According to the difference of shape, circular knob or polygon rotation could be arranged to
Button or indicator knob, also or manual turntable etc., are not limited herein.In the embodiment of the present invention, adjusting knob can be set
The corresponding coil turn changed of predetermined angle is often turned over, such as, often rotates 30 degree, the coil turn that correspondence changes is 30 circles
Deng.
Be further, the E types transformer in the embodiment of the present invention also include be used for isolate clutter first coil L3 and
Second coil L4, and first coil L3 and the second coil L4 be wrapped on the magnetic core in the middle of E shaped iron cores.
By setting first coil L3 and the second coil L4, primary coil L1 first enters with first coil L3, the second coil L4
Row electromagnetic induction, then electromagnetic induction is carried out by first coil L3, the second coil L4, thus it is indirect by electric energy from primary coil L1
Transmit to secondary coil L2.The clutter that can so isolate between primary coil L1 and secondary coil L2, makes the primary of grid side
The clutter produced on coil L1, is unlikely to propagate to secondary coil L2, to ensure the stabilization of ac output end.
In the present embodiment, the magnetic core in the middle of E shaped iron cores can extend along direction and stretch, to adjust first coil L3 and second
The number of turn that coil L4 is wound on the magnetic core in the middle of E shaped iron cores.By changing first coil L3 and the second coil L4 in centre
Effective turn on magnetic core, can adjust primary coil L1 and secondary coil L2 voltage ratio, and then adjust ac output end
Output voltage.
The collapsing length of magnetic core in the middle of E shaped iron cores, can be adjusted manually, can also be by setting drive mechanism to adjust automatically
Section.As a kind of preferred embodiment, adjusting knob is provided with E shaped iron cores, manually magnetic core can be directly adjusted
Stroke, to adjust the coil turn wound on the magnetic core.By changing the effective turn on the magnetic core, primary line can be adjusted
Voltage ratio between circle and secondary coil, and then adjust the output voltage of ac output end.
In the embodiment of the present invention, the magnetic core at E shaped iron cores two ends can also be also configured as to the magnetic core of adjustable and retractable amount, had
The regulative mode of body is the same with the regulation process of the magnetic core in above-mentioned centre position, will not be repeated here.Pass through above-mentioned adjustable magnetic
The setting of core, substantially increases transformer voltage and changes scope, improve the service efficiency of E type transformers.
In addition, the primary coil and secondary coil in the present embodiment are all connected to coil turn tester；Coil turn is surveyed
Display screen is provided with examination instrument, in real time the number of turn of display coil.
When concrete application, when changing the number of turn of primary coil and secondary coil by adjusting knob, it is possible to use
The coil turn tester being connected with primary coil and secondary coil, its number of turn of real-time testing, and it is aobvious to user by display
Show the current number of turn, facilitate user that the number of turn regulation of primary coil and secondary coil is arrived into required value.
In the E type transformers that the embodiment of the present invention is provided, it is wrapped in by adjusting the stroke of magnetic core, and then changing
On coil the number of turn, come realize change voltage, electric current purpose, meet demand of the circuit to many time variant voltages.
Embodiment two：
The embodiment of the present invention provides a kind of safety alarm device, can be applied to the power supply scene such as family, office, factory.Such as
Shown in Fig. 3, the safety alarm device includes induction coil L0, alarm chip, alarm and the E types as described in embodiment one and become
Depressor.
Induction coil L0 connects with the primary coil L1 of E type transformers, so induction coil L0 electric current and transformer
The size of current of primary coil is synchronous, and regard induction coil L0 electric current as induced signal.E type transformers TB time
Level coil L2 connection ac output ends.The power end of alarm chip is connected to primary coil L1 two ends, and in primary
Between coil L1 wherein one end and alarm chip, the filter circuit of filter resistance R1 and filter capacitor C1 compositions is provided with.
Alarm chip receives induced signal, when induced signal exceeds preset value, alarm chip output alarm enabling signal.
Alarm receives the alarm enabling signal that alarm chip is sent, and sends alarm according to alarm enabling signal.
Safety alarm device provided in an embodiment of the present invention, is generated and the primary coil of transformer using induction coil L0
The synchronous induced signal of size of current, and (i.e. the electric current of the primary coil of transformer is big by induction coil L0 size of current
It is small) as the alert if of the failures such as power network overvoltage, therefore, it is possible to improve the sensitivity of circuit protection, more efficient protection transmission of electricity
Circuit, so as to improve the security of transmission line of electricity.
In the present embodiment, induction coil L0 two ends connect two inputs of alarm chip respectively, connect alarm chip
Receive the induced signal that induction chip is produced.Also, filter capacitor C0 is connected between induction coil L0 one end and alarm chip,
During preventing that the amplitude of induced signal is excessive, alarm chip is caused damage.
The warning device that the embodiment of the present invention is used, is a kind of consequence to prevent or preventing caused by the generation of certain event,
Alarm is sent to remind or warn user to take the electronic product of the precautionary measures.
As a preferred scheme, the warning device in the embodiment of the present invention includes buzzer siren.Work as warning device
When receiving the alarm enabling signal that alarm chip is sent, buzzer siren will send alarm sound, point out user to take strick precaution
Measure.
Further, visual alarm is also included in the warning device in the embodiment of the present invention.When warning device receives report
During the alarm enabling signal that alert chip is sent, buzzer siren will send alarm light, point out user to take the precautionary measures.
As shown in figure 4, the alarm chip of the present embodiment includes comparing unit and trigger element.Comparing unit receives sensing
Signal, and induced signal is compared with preset value.When induced signal exceeds preset value, trigger element output alarm starts
Signal.
As a preferred scheme, multistable trigger is provided with trigger element, multistable trigger is also referred to as n stable states
Trigger, is the further development of bistable state tentaculum.If input and remaining output end at different levels of every one-level of n amplifying stage
Between have dc-couple, then n stable state is can obtain under certain bar, and there was only in each stable state one-level conducting, and its
Remaining is turned off.In nonbinary counter circuit, the quick sound under a variety of different conditions can be realized using polymorphic trigger
Should, thus than flip and flop generator response speed faster.
By using with highly sensitive comparing unit and trigger element in the embodiment of the present invention, and in trigger element
Middle setting multistable trigger, enables alarm chip to be responded within 0.1 second, is opened so as to send alarm within the extremely short time
Dynamic signal, effectively protection power network and transformer.
In safety alarm device provided in an embodiment of the present invention, in addition to the first relay J1 and the second relay J2.The
One relay J1 can be used for the protection device of connection ac output end, such as the output end of protection device is connected into the first relay
J1 control coil.First relay J1 output end is connected with the second relay J2 control coil, the second relay J2's
Output end is connected with E type transformers TB primary coil L1.
As a preferred scheme, when the first relay J1 is closed type relay, i.e. control coil no power first after
Electrical equipment J1 output is in closure state.Meanwhile, when the second relay J2 is normal-open type relay, i.e. control coil no power
First relay J1 output end is off.
In the case of safety alarm device normal power supply, the first relay J1 control coil no power, the first relay
Device J1 output in closure state, therefore control power supply can by control line from the first relay J1 to the second relay J2
Circle power supply.Second relay J2 control coil is in the case of energization, and its output is in closure state, to maintain E types to become
Depressor TB primary coil L1 continued powers.
When protection device exports power-off signal, the first relay J1 control coil is powered, and makes the first relay J1's
Output end disconnects.Because the first relay J1 output end disconnects, therefore the second relay J2 control coil power-off, make second
Relay J2 output end disconnects, so that the connection of power network and E type transformers TB primary coil L1 is cut off, to cut off safe report
The power supply of alarm device, realizes the protection of supply line.
In the present embodiment, the first relay J1 uses closed type relay, and the second relay J2 uses normal-open type relay
Have further the advantage that：In actual safety alarm device, can the first relay J1 output end and the second relay
The relay for multiple different purposes of being connected between J2 control coil, such as relay, overvoltage protection for arc protection
Relay, and the relay for short-circuit protection.These relays also all use closed type relay, and each relay
Control coil of the output end all with the second relay J2 connect, then when wherein any one relay disconnects, the can be made
Two relay J2 control coil power-off, so as to cut off the power supply of power system.
The safety alarm device that the embodiment of the present invention two is provided, the E type transformers provided with above-described embodiment one, with phase
Same technical characteristic, so can also solve identical technical problem, reaches identical technique effect.
Safety alarm device provided in an embodiment of the present invention, is generated and the primary coil of transformer using induction coil L0
The synchronous induced signal of size of current, and by induction coil L0 size of current, that is, by the primary coil of transformer
Size of current as the failures such as power network overvoltage alert if, therefore, it is possible to improve the sensitivity of circuit protection, more efficient guarantor
Transmission line of electricity is protected, so as to improve the security of transmission line of electricity.
If the function is realized using in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Understood based on such, technical scheme is substantially in other words
The part contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are to cause a computer equipment (can be individual
People's computer, processor, or network equipment etc.) perform all or part of step of each of the invention embodiment method.And it is preceding
The storage medium stated includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), random access memory
(RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
Finally it should be noted that：Above example, is only the embodiment of the present invention, the skill to illustrate the present invention
Art scheme, rather than its limitations, protection scope of the present invention is not limited thereto, although entering with reference to the foregoing embodiments to the present invention
Go detailed description, it will be understood by those within the art that：Any one skilled in the art is at this
Invent in the technical scope disclosed, it still can modify to the technical scheme described in previous embodiment or can think easily
Equivalent substitution is carried out to change, or to which part technical characteristic；And these modifications, change or replacement, do not make corresponding
The essence of technical scheme departs from the spirit and scope of technical scheme of the embodiment of the present invention, should all cover in protection scope of the present invention
Within.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of E types transformer, it is characterised in that including primary coil, secondary coil and E shaped iron cores；
Wherein, the E shaped iron cores include：One horizontal magnetic core and three longitudinal magnetic cores；
Described three longitudinal magnetic cores are separately positioned on the two ends and centre position of the horizontal magnetic core；
The end that longitudinal magnetic core in centre position is connected with the horizontal magnetic core is arranged on, adjusting knob is provided with；
Rotation of adjustment knob can make longitudinal magnetic core extend along direction stretch, with adjust be wound on longitudinal magnetic core
The number of turn of coil；
The primary coil and secondary coil are respectively wound around the magnetic core of the E shaped iron cores.
2. E types transformer according to claim 1, it is characterised in that the primary coil and secondary coil difference
It is wrapped in the magnetic core at the E shaped iron cores two ends.
3. E types transformer according to claim 1, it is characterised in that two parts of the primary coil are respectively wound around
The magnetic core at the E shaped iron cores two ends, two parts of the secondary coil are respectively wound around the magnetic core at the E shaped iron cores two ends.
4. E types transformer according to claim 3, it is characterised in that also including for isolate clutter first coil and
Second coil, and the first coil and second coil are wrapped in the magnetic core in the middle of the E shaped iron cores.
5. E types transformer according to claim 4, it is characterised in that be arranged on longitudinal magnetic core and the transverse direction at two ends
The end of magnetic core connection is also equipped with adjusting knob, and rotating the adjusting knob can make longitudinal magnetic core extend along direction
It is flexible, to adjust the number of turn for being wound in the magnetic core coil.
6. the E type transformers according to claim any one of 1-5, it is characterised in that the primary coil and secondary coil
It is all connected to coil turn tester；
Display screen is provided with the coil turn tester, in real time the number of turn of display coil.
7. a kind of safety alarm device, it is characterised in that including induction coil, alarm chip, alarm and such as claim 1
To the E type transformers described in 6 any one；
The induction coil is used to connect with the primary coil of the E types transformer, and produces induced signal；
The secondary coil connection ac output end of the E types transformer；
The alarm chip receives the induced signal, when the induced signal exceeds preset value, the alarm chip output
Alarm enabling signal；
The alarm receives the alarm enabling signal, and sends alarm according to the alarm enabling signal.
8. safety alarm device according to claim 7, it is characterised in that the alarm chip include comparing unit and
Trigger element；
The comparing unit receives the induced signal, and the induced signal is compared with the preset value；
When the induced signal exceeds preset value, the trigger element output alarm enabling signal.
9. safety alarm device according to claim 8, it is characterised in that the alarm chip and the induction coil it
Between be connected with filter capacitor.
10. safety alarm device according to claim 9, it is characterised in that the warning device includes buzzing alarm
Device and/or visual alarm.
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|---|---|---|---|
| CN201710477883.9A CN107068370A (en) | 2017-06-22 | 2017-06-22 | E types transformer and safety alarm device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710477883.9A CN107068370A (en) | 2017-06-22 | 2017-06-22 | E types transformer and safety alarm device |
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| CN201710477883.9A Pending CN107068370A (en) | 2017-06-22 | 2017-06-22 | E types transformer and safety alarm device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108257465A (en) * | 2018-04-12 | 2018-07-06 | 常州纺织服装职业技术学院 | The quick detachable teaching transformer of twin coil |
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