CN207752063U - A kind of isolation voltage sensor - Google Patents
A kind of isolation voltage sensor Download PDFInfo
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- CN207752063U CN207752063U CN201820155357.0U CN201820155357U CN207752063U CN 207752063 U CN207752063 U CN 207752063U CN 201820155357 U CN201820155357 U CN 201820155357U CN 207752063 U CN207752063 U CN 207752063U
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Abstract
The utility model discloses a kind of isolation voltage sensors, the sensor includes the input voltage module being sequentially connected, signal conversion module and signal output module, for the input voltage module through signal modulation circuit to the signal conversion module input exchange signal, the signal conversion module makes the signal output module export direct current signal by signal demodulating circuit.A kind of isolation voltage sensor of the utility model, it can ensure that AC signal normally generates by signal modulation circuit, pass through signal demodulating circuit, stable direct current signal can be exported, the direct current signal that the AC signal and signal demodulating circuit generated due to signal modulation circuit is generated is mutually isolated, can improve reliability and safety.
Description
Technical field
The utility model belongs to transformer technology field more particularly to a kind of isolation voltage sensor.
Background technology
Voltage sensor is a kind of instrument that can be converted into tested DC voltage to export DC voltage by linear scale, electricity
Pressure sensor possesses precision height, and response is fast, good linearity, bandwidth, and overload is strong and does not lose the advantages that measuring energy, extensive use
Electric power, electronics, inverter, Switching Power Supply, ac variable frequency speed regulation, remote monitoring, instrument and meter, Medical Devices, industry from
The numerous areas such as control.
Since voltage sensor product refers in items such as measurement accuracy, temperature characterisitic, response time, stability, reliabilities
Put on strict demand, it is desirable to improve product properties, need to be innovated on the basis of conventional voltage sensor and
It breaks through, while improving safety in utilization, it being capable of rfpa output signal and detected input signals.
Utility model content
There is problem for the above-mentioned prior art, the utility model provides a kind of isolation voltage sensor, can be isolated defeated
Go out signal and detected input signals, improves safety in utilization.
The utility model is achieved through the following technical solutions above-mentioned purpose：
A kind of isolation voltage sensor, the sensor include the input voltage module being sequentially connected, signal conversion module
And signal output module, the input voltage module through signal modulation circuit to the signal conversion module input exchange signal,
The signal conversion module makes the signal output module export direct current signal by signal demodulating circuit；
The signal conversion module is transformer, and the transformer has primary side N 1, a pair of mutually matched first secondary side
The secondary N4 and fourth officer side N5 in N3, a pair of mutually matched third pair of N2 and second, a pair of mutually matched 5th pair
The N7 when N6 and the 6th are secondary, the primary side N 1 have the first contact L1, the second contact L2, the first pair side N2 and the
Second mate side N3 has third contact L3, the 5th contact L5 and the 4th shared contact L4, third pair side N4 and the 4th
Secondary side N5 has the 6th contact L6, the 8th contact L8 and the 7th shared contact L7, the 5th pair side N6 and described the
Six pair side N7 have the 9th contact L9, the 11st contact L11 and the tenth shared contact L10；
There is the signal modulation circuit first input end and the described 4th being connected with the input voltage module to connect
The second input terminal that point L4 is connected, the signal modulation circuit further include the first rectifier diode D1, the second rectifier diode
D2, third rectifier diode D3, the 4th rectifier diode D4, the 5th rectifier diode D5 and the 6th rectifier diode D6, institute
The input terminal for stating the first rectifier diode D1 is connected with the first input end of the signal modulation circuit, first rectification two
The output end of pole pipe D1 is connected in parallel to the first branch, the first branch and third branch, second rectifier diode respectively
D2 is arranged in the first branch, and the third rectifier diode D3 and the 4th rectifier diode D4 are connected on described the
One road, the 5th rectifier diode D5 and the 6th rectifier diode D6 are connected on the third branch road；It is described
Signal modulation circuit further includes first resistor R1, second resistance R2,3rd resistor R3, the first NPN triode Q1, the 2nd NPN tri-
Pole pipe Q2, the first capacitance C1, the second capacitance C2, the 4th branch and the 5th branch, one end of the first resistor R1 and described
One end of two resistance R2 is connected with second input terminal, the other end of the first resistor R1 and the second resistance R2's
The other end is connected to the second resistance R2 and described by the 3rd resistor R3 connections, one end of the first capacitance C1
On the circuit of three resistance R3 connections, the other end of the first capacitance C1 is connected with the second contact L2, second capacitance
The both ends of C2 are connected with the third contact L3 with the 5th contact L5 respectively, and one end of the 4th branch is connected to described
Between second capacitance C2 and the third contact L3, the other end of the 4th branch is connected to the 5th rectifier diode D5
Third branch road between the 6th rectifier diode D6, one end of the 5th branch is connected to the second capacitance C2
Between the 5th contact L5, the other end of the 5th branch is connected to the third rectifier diode D3 and the described 4th
In the first branch between rectifier diode D4, the basis set of first NPN triode Q1 and the first resistor R1's is another
End connection, the collector of first NPN triode Q1 are connected with the third contact L3, the second NPN triode Q2's
Basis set is connected with the other end of the second resistance R2, the collector and the 5th contact L5 of the second NPN triode Q2
Connection, the emitter of first NPN triode Q1 are connected with the emitter of the second NPN triode Q2；
The signal demodulating circuit includes positive circuit, anode circuit, the 6th branch, the 7th branch, the first N-channel field effect
Should pipe Q3, the second N-channel field-effect tube Q4, inductance L, third capacitance C3, the 4th capacitance C4, the 4th resistance R4, the 5th resistance R5,
6th resistance R6, the 7th rectifier diode D7, the 8th rectifier diode D8, one end of the anode circuit and the 7th contact
L7 connections, it is described anode circuit the other end and the signal output module anode connection, one end of the anode circuit and
The 6th contact L6 connections, the other end of the anode circuit are connected with the cathode of the signal output module, the first N
Channel field-effect pipe Q3 is arranged in the anode circuit, and the edge pole and the described 6th of the first N-channel field-effect tube Q3 connects
The grid of point L6 connections, the first N-channel field-effect tube Q3 is connected with the 9th contact L9, first N-channel field effect
Should the drain electrode of pipe Q3 connected with the cathode of the signal output module, the grid of the second N-channel field-effect tube Q4 and described
The edge pole of 11st contact L11 connections, the second N-channel field-effect tube Q4 is connected with the 8th contact L8, and described
The drain electrode of two N-channel field-effect tube Q4 is connected to the drain electrode of the first N-channel field-effect tube Q3 and the signal output module
Cathode between anode circuit on, one end of the third capacitance C3 is connected to the leakage of the second N-channel field-effect tube Q4
In anode circuit between pole and the cathode of the signal output module, the other end and the described tenth of the third capacitance C3 connects
Point L10 connections, the inductance L are arranged on the electrode line road, and one end of the 6th branch is connected to the inductance L and institute
The electrode line road between the anode of signal output module is stated, the other end of the 6th branch is connected to the third capacitance C3
One end and the cathode of the signal output module between anode circuit on, the 6th road is from the electrode line road direction
The direction of the anode circuit is disposed with the 4th resistance R4, the 7th rectifier diode D7 and the 8th rectification
The other end of diode D8, the third capacitance C3 are also between the 4th resistance R4 and the 7th rectifier diode D7
6th branch connects, one end of the 7th branch be connected to the 6th branch one end and the signal output module just
Electrode line road between pole, the other end of the 7th branch be connected to the 6th branch the other end and the signal it is defeated
Go out in the anode circuit between the cathode of module, the 4th capacitance C4 is arranged on the 7th road, the 5th resistance
R5 is arranged on the electrode line road between one end and the anode of the signal output module of the 7th branch, the 6th electricity
Resistance R6 and the 5th resistance R5 is arranged in parallel.
Further, it is provided with input protection module between the input voltage module and the signal conversion module, prevented
Only input voltage signal causes unnecessary loss extremely.
Further, it is provided with signal filter module between the signal conversion module and the signal output module, with
Carry out signal filtering.
The utility model has the beneficial effects that：
A kind of isolation voltage sensor of the utility model can ensure that AC signal normally produces by signal modulation circuit
It is raw, by signal demodulating circuit, stable direct current signal can be exported, the AC signal and letter generated due to signal modulation circuit
The direct current signal that number demodulator circuit generates is mutually isolated, can improve reliability and safety.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of system structure diagram of isolation voltage sensor of the utility model embodiment；
Fig. 2 is the circuit diagram of the signal modulation circuit in the utility model embodiment；
Fig. 3 is the circuit diagram of the signal demodulating circuit in the utility model embodiment.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The utility model embodiment discloses a kind of flue gas measuring device.
Fig. 1 is a kind of system structure diagram of isolation voltage sensor of the utility model embodiment, with reference to figure 1, originally
A kind of isolation voltage sensor of utility model embodiment, which is characterized in that sensor includes the input voltage mould being sequentially connected
Block a, signal conversion module c and signal output module e, input voltage module a are defeated to signal conversion module c through signal modulation circuit
Enter AC signal, signal conversion module c makes signal output module e export direct current signal by signal demodulating circuit.
Fig. 2 is the circuit diagram of the signal modulation circuit in the utility model embodiment, and Fig. 3 is implemented for the utility model
The circuit diagram of signal demodulating circuit in example.Referring to Fig. 2 and Fig. 3, the signal conversion module c of the utility model embodiment is
There is primary side N 1, a pair of mutually matched first secondary N3 when N2 and second is secondary, a pair to cooperate for transformer, transformer
Third pair in N4 and fourth officer N5, a pair of mutually matched 5th secondary N7 when N6 and the 6th is secondary, primary side N 1 have
First contact L1, the second contact L2, the first secondary N3 when N2 and second is secondary is with third contact L3, the 5th contact L5 and altogether
The 4th contact L4 having, third pair N5 in N4 and fourth officer have the 6th contact L6, the 8th contact L8 and shared the
There is seven contact L7, the 5th secondary N7 when N6 and the 6th is secondary 9th contact L9, the 11st contact L11 and the shared the tenth to connect
Point L10.
In conjunction with Fig. 2, the signal modulation circuit of the utility model embodiment has be connected with input voltage module a first
The second input terminal that input terminal and the 4th contact L4 are connected, signal modulation circuit further include the first rectifier diode D1, second
Rectifier diode D2, third rectifier diode D3, the 4th rectifier diode D4, the 5th rectifier diode D5 and the 6th rectification two
Pole pipe D6, the input terminal of the first rectifier diode D1 are connected with the first input end of signal modulation circuit, two pole of the first rectification
The output end of pipe D1 is connected in parallel to the first branch 1, the first branch 2 and third branch 3 respectively, and the second rectifier diode D2 is set
It sets in the first branch 1, third rectifier diode D3 and the 4th rectifier diode D4 are connected in the first branch 2, the 5th rectification
Diode D5 and the 6th rectifier diode D6 are connected on third branch 3；Signal modulation circuit further includes first resistor R1, second
Resistance R2,3rd resistor R3, the first NPN triode Q1, the second NPN triode Q2, the first capacitance C1, the second capacitance C2, the 4th
One end of branch 4 and the 5th branch 5, first resistor R1 is connected with the second input terminal with one end of second resistance R2, the first electricity
The other end of resistance R1 is connected with the other end of second resistance R2 by 3rd resistor R3, and one end of the first capacitance C1 is connected to second
On the circuit that resistance R2 is connected with 3rd resistor R3, the other end of the first capacitance C1 and the second contact L2 connections, the second capacitance C2
Both ends connected respectively with third contact L3 and the 5th contact L5, one end of the 4th branch 4 is connected to the second capacitance C2 and third
Between contact L3, the other end of the 4th branch 4 is connected between the 5th rectifier diode D5 and the 6th rectifier diode D6
On three branches 3, one end of the 5th branch 5 is connected between the second capacitance C2 and the 5th contact L5, and the other end of the 5th branch 5 connects
It is connected in the first branch 2 between third rectifier diode D3 and the 4th rectifier diode D4, the basis set of the first NPN triode Q1
It is connected with the other end of first resistor R1, the collector of the first NPN triode Q1 is connected with third contact L3, tri- poles the 2nd NPN
The basis set of pipe Q2 is connected with the other end of second resistance R2, the collector of the second NPN triode Q2 and the 5th contact L5 connections, the
The emitter of the emitter of one NPN triode Q1 and the second NPN triode Q2 are connected.
In conjunction with Fig. 3, the signal demodulating circuit of the utility model embodiment include positive circuit 8, anode circuit 9, the 6th
Road 6, the 7th branch 7, the first N-channel field-effect tube Q3, the second N-channel field-effect tube Q4, inductance L, third capacitance C3, the 4th electricity
Hold C4, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th rectifier diode D7, the 8th rectifier diode D8, anode
One end of circuit 8 is connected with the 7th contact L7, the anode connection of the other end and signal output module e of positive circuit 8, negative line
The one end on road 9 is connected with the 6th contact L6, and the other end of anode circuit 9 is connected with the cathode of signal output module e, the first N ditches
Road field-effect tube Q3 is arranged in anode circuit 9, and the edge pole of the first N-channel field-effect tube Q3 is connected with the 6th contact L6, the first N
The grid of channel field-effect pipe Q3 and the 9th contact L9 connections, the drain electrode of the first N-channel field-effect tube Q3 and signal output module e
Cathode connection, the grid of the second N-channel field-effect tube Q4 and the 11st contact L11 connections, the second N-channel field-effect tube Q4's
Edge pole is connected with the 8th contact L8, and the drain electrode of the second N-channel field-effect tube Q4 is connected to the leakage of the first N-channel field-effect tube Q3
In anode circuit 9 between pole and the cathode of signal output module e, one end of third capacitance C3 is connected to the second N-channel field effect
In anode circuit 9 that should be between the drain electrode and the cathode of signal output module e of pipe Q4, the other end and the tenth of third capacitance C3 connects
Point L10 connections, inductance L are arranged on positive circuit 8, and one end of the 6th branch 6 is connected to inductance L's and signal output module e
On positive circuit 8 between anode, the other end of the 6th branch 6 is connected to one end and the signal output module e of third capacitance C3
Cathode between anode circuit 9 on, be disposed with the 4th from positive circuit 8 to the direction of anode circuit 9 on the 6th branch 6
Resistance R4, the 7th rectifier diode D7 and the 8th rectifier diode D8, the other end of third capacitance C3 also with the 4th resistance R4 and
The 6th branch 6 connection between 7th rectifier diode D7, one end of the 7th branch 7 is connected to one end and the letter of the 6th branch 6
On positive circuit 8 between the anode of number output module e, the other end of the 7th branch 7 be connected to the 6th branch 6 the other end and
In anode circuit 9 between the cathode of signal output module e, the 4th capacitance C4 is arranged on the 7th branch 7, and the 5th resistance R5 is set
It sets on the positive circuit 8 between one end and the anode of signal output module e of the 7th branch 7, the electricity of the 6th resistance R6 and the 5th
Resistance R5 is arranged in parallel.
A kind of isolation voltage sensor of the utility model embodiment, can ensure AC signal by signal modulation circuit
It is normal to generate, by signal demodulating circuit, stable direct current signal can be exported, the exchange letter generated due to signal modulation circuit
Number and signal demodulating circuit generate direct current signal it is mutually isolated, reliability and safety can be improved.
In the utility model embodiment, input voltage module a can be current regulator power supply.
In conjunction with Fig. 1, input is provided between the input voltage module a and signal conversion module c of the utility model embodiment
Protection module b prevents input voltage signal from causing unnecessary loss extremely.
In conjunction with Fig. 1, signal is provided between the signal conversion module c and signal output module e of the utility model embodiment
Filter module d, to carry out signal filtering.
Embodiment provided above is the better embodiment of the utility model, only is used for facilitating illustrating the utility model, and
It is non-to impose any limitation on the present invention, any those of ordinary skill in the art, if not departing from
In the range of the carried technical characteristic of the utility model, locally changes or repair using made by the utility model disclosed technology content
The equivalent embodiment of decorations, and without departing from the technical characteristics of the utility model content, still fall within the utility model technical characteristic
In the range of.
Claims (3)
1. a kind of isolation voltage sensor, which is characterized in that the sensor include the input voltage module (a) being sequentially connected,
Signal conversion module (c) and signal output module (e), the input voltage module (a) is through signal modulation circuit to the signal
Conversion module (c) input exchange signal, the signal conversion module (c) make the signal output module by signal demodulating circuit
(e) direct current signal is exported；
The signal conversion module (c) is transformer, and the transformer has primary side N 1, a pair of mutually matched first secondary side
The secondary N4 and fourth officer side N5 in N3, a pair of mutually matched third pair of N2 and second, a pair of mutually matched 5th pair
The N7 when N6 and the 6th are secondary, the primary side N 1 have the first contact L1, the second contact L2, the first pair side N2 and the
Second mate side N3 has third contact L3, the 5th contact L5 and the 4th shared contact L4, third pair side N4 and the 4th
Secondary side N5 has the 6th contact L6, the 8th contact L8 and the 7th shared contact L7, the 5th pair side N6 and described the
Six pair side N7 have the 9th contact L9, the 11st contact L11 and the tenth shared contact L10；
The signal modulation circuit has the first input end being connected with the input voltage module (a) and the 4th contact
The second input terminal that L4 is connected, the signal modulation circuit further include the first rectifier diode D1, the second rectifier diode D2,
Third rectifier diode D3, the 4th rectifier diode D4, the 5th rectifier diode D5 and the 6th rectifier diode D6, described
The input terminal of one rectifier diode D1 is connected with the first input end of the signal modulation circuit, first rectifier diode
The output end of D1 is connected in parallel to the first branch (1), the first branch (2) and third branch (3), second rectification two respectively
Pole pipe D2 is arranged in the first branch (1), the third rectifier diode D3 and the 4th rectifier diode D4 series connection
In the first branch (2), the 5th rectifier diode D5 and the 6th rectifier diode D6 are connected on the third
On branch (3)；The signal modulation circuit further includes first resistor R1, second resistance R2,3rd resistor R3, tri- poles the first NPN
Pipe Q1, the second NPN triode Q2, the first capacitance C1, the second capacitance C2, the 4th branch (4) and the 5th branch (5), described first
One end of resistance R1 is connected with second input terminal with one end of the second resistance R2, and the first resistor R1's is another
End is connected with the other end of the second resistance R2 by the 3rd resistor R3, and one end of the first capacitance C1 is connected to institute
It states on the circuit that second resistance R2 is connected with the 3rd resistor R3, the other end and second contact of the first capacitance C1
The both ends of L2 connections, the second capacitance C2 are connected with the third contact L3 with the 5th contact L5 respectively, and the described 4th
One end of branch (4) is connected between the second capacitance C2 and the third contact L3, the other end of the 4th branch (4)
It is connected on the third branch (3) between the 5th rectifier diode D5 and the 6th rectifier diode D6, the described 5th
One end of branch (5) is connected between the second capacitance C2 and the 5th contact L5, the other end of the 5th branch (5)
It is connected in the first branch (2) between the third rectifier diode D3 and the 4th rectifier diode D4, described first
The basis set of NPN triode Q1 is connected with the other end of the first resistor R1, the collector of first NPN triode Q1 and institute
The L3 connections of third contact are stated, the basis set of the second NPN triode Q2 is connected with the other end of the second resistance R2, and described
The collector of two NPN triode Q2 is connected with the 5th contact L5, the emitter of first NPN triode Q1 and described
The emitter of two NPN triode Q2 is connected；
The signal demodulating circuit includes positive circuit (8), anode circuit (9), the 6th branch (6), the 7th branch (7), the first N
Channel field-effect pipe Q3, the second N-channel field-effect tube Q4, inductance L, third capacitance C3, the 4th capacitance C4, the 4th resistance R4,
Five resistance R5, the 6th resistance R6, the 7th rectifier diode D7, the 8th rectifier diode D8, it is described anode circuit (8) one end and
The 7th contact L7 connections, the other end of the anode circuit (8) and the anode connection of the signal output module (e), institute
The one end for stating anode circuit (9) is connected with the 6th contact L6, the other end of the anode circuit (9) and signal output
The cathode of module (e) connects, and the first N-channel field-effect tube Q3 is arranged in the anode circuit (9), the first N ditches
The edge pole of road field-effect tube Q3 is connected with the 6th contact L6, the grid of the first N-channel field-effect tube Q3 and described
Nine contact L9 connections, the drain electrode of the first N-channel field-effect tube Q3 are connected with the cathode of the signal output module (e), institute
The grid for stating the second N-channel field-effect tube Q4 is connected with the 11st contact L11, the second N-channel field-effect tube Q4's
Edge pole is connected with the 8th contact L8, and the drain electrode of the second N-channel field-effect tube Q4 is connected to first N-channel field
In anode circuit (9) between the drain electrode and the cathode of the signal output module (e) of effect pipe Q3, the third capacitance C3's
One end is connected to the cathode between the drain electrode and the cathode of the signal output module (e) of the second N-channel field-effect tube Q4
On circuit (9), the other end of the third capacitance C3 is connected with the tenth contact L10, and the inductance L is arranged in the anode
On circuit (8), one end of the 6th branch (6) is connected between the inductance L and the anode of the signal output module (e)
Positive circuit (8) on, the other end of the 6th branch (6) be connected to the third capacitance C3 one end and the signal it is defeated
Go out in the anode circuit between the cathode of module (e) (9), is born from the positive circuit (8) to described on the 6th branch (6)
The direction on polar curve road (9) is disposed with the 4th resistance R4, the 7th rectifier diode D7 and the 8th rectification two
The other end of pole pipe D8, the third capacitance C3 also between the 4th resistance R4 and the 7th rectifier diode D7
Six branches (6) connect, and one end of the 7th branch (7) is connected to one end and the signal output of the 6th branch (6)
On positive circuit (8) between the anode of module (e), the other end of the 7th branch (7) is connected to the 6th branch (6)
The other end and the cathode of the signal output module (e) between anode circuit (9) on, the 4th capacitance C4 is arranged in institute
It states on the 7th branch (7), the 5th resistance R5 is arranged in one end of the 7th branch (7) and the signal output module
(e) on the positive circuit (8) between anode, the 6th resistance R6 and the 5th resistance R5 are arranged in parallel.
2. a kind of isolation voltage sensor according to claim 1, which is characterized in that the input voltage module (a) and
Input protection module (b) is provided between the signal conversion module (c).
3. a kind of isolation voltage sensor according to claim 1, which is characterized in that the signal conversion module (c) and
It is provided with signal filter module (d) between the signal output module (e).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820155357.0U CN207752063U (en) | 2018-01-30 | 2018-01-30 | A kind of isolation voltage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820155357.0U CN207752063U (en) | 2018-01-30 | 2018-01-30 | A kind of isolation voltage sensor |
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| Publication Number | Publication Date |
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| CN207752063U true CN207752063U (en) | 2018-08-21 |
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| CN201820155357.0U Active CN207752063U (en) | 2018-01-30 | 2018-01-30 | A kind of isolation voltage sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836998A (en) * | 2020-01-09 | 2020-02-25 | 宁波中车时代传感技术有限公司 | Voltage sensor circuit |
| CN112688564A (en) * | 2019-10-17 | 2021-04-20 | 上海辰竹仪表有限公司 | Isolation transmission circuit of transformer based on center tap removal |
| CN112816760A (en) * | 2020-12-30 | 2021-05-18 | 西安西驰电气股份有限公司 | Alternating-current high-voltage detection device and method for medium-high voltage soft starter |
-
2018
- 2018-01-30 CN CN201820155357.0U patent/CN207752063U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688564A (en) * | 2019-10-17 | 2021-04-20 | 上海辰竹仪表有限公司 | Isolation transmission circuit of transformer based on center tap removal |
| CN110836998A (en) * | 2020-01-09 | 2020-02-25 | 宁波中车时代传感技术有限公司 | Voltage sensor circuit |
| CN112816760A (en) * | 2020-12-30 | 2021-05-18 | 西安西驰电气股份有限公司 | Alternating-current high-voltage detection device and method for medium-high voltage soft starter |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An isolated voltage sensor Effective date of registration: 20220222 Granted publication date: 20180821 Pledgee: Bank of China Limited Wuhan Jianghan sub branch Pledgor: WUHAN ZHENGYUAN ELECTRIC Co.,Ltd. Registration number: Y2022420000040 |