CN110333384A - Three-phase alternating voltage high-precision quick detection circuit based on mutual inductor - Google Patents
Three-phase alternating voltage high-precision quick detection circuit based on mutual inductor Download PDFInfo
- Publication number
- CN110333384A CN110333384A CN201910754226.3A CN201910754226A CN110333384A CN 110333384 A CN110333384 A CN 110333384A CN 201910754226 A CN201910754226 A CN 201910754226A CN 110333384 A CN110333384 A CN 110333384A
- Authority
- CN
- China
- Prior art keywords
- phase
- positive
- negative
- amplifier
- diode
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- 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
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
Abstract
The invention belongs to industrial measurement and control fields, are related to a kind of three-phase alternating current pressure high-precision quick detection circuit based on mutual inductor, suitable for all kinds of applications for needing to be pressed with three-phase alternating current valid value and carrying out high-precision real-time monitoring and control.Circuit of the present invention includes positive amplifier IC3, A phase negative sense amplifier IC4, B phase negative sense amplifier IC5, the C phase negative sense amplifier IC6 of positive amplifier IC2, the C phase of positive amplifier IC1, the B phase of threephase potential transformer VS1, A phase, positive positive diode D3, A phase negative diode D4, B phase negative diode D5, C phase negative diode D6 of diode D2, C phase of positive diode D1, B phase of output amplifier IC7, A phase etc..The present invention is made of three-phase bridge super diodes rectification circuit, ac voltage signal processing circuit, can high-precision, wide scope, in real time the detection effective value signal of three-phase alternating voltage.The circuit is simple, at low cost, high reliablity, versatility are good, is easy to commercialization.
Description
Technical field
The invention belongs to industrial measurement and control fields, are related to a kind of circuit, in particular to a kind of three-phase alternating current based on mutual inductor
Voltage high accuracy quick detection circuit, suitable for it is all kinds of need to three-phase alternating voltage virtual value carry out high-precision real-time monitoring with
The application of control.
Background technique
In the types of applications system powered based on three-phase alternating current, detection three-phase alternating voltage virtual value, mesh are required
The detection scheme of preceding common three-phase alternating voltage virtual value mainly has two major classes: one is be based on threephase potential transformer and two
The scheme of pole pipe three phase rectifier filter circuit exports three-phase alternating voltage effective value transformation at d. c. voltage signal；It is another
It is the scheme based on Hall voltage sensor.But the following problems exist respectively for the two current schemes: first is that being based on three-phase voltage
The scheme of mutual inductor and three-phase diode current rectifying and wave filtering circuit, although simple and reliable, since diode rectifier circuit has pressure drop
Loss not there is only the non-linear of detection and influences detection accuracy, detection range is also limited, in addition, there is also larger
Detection hysteresis quality.Second is that the scheme based on Hall voltage sensor is limited its scope of application due to expensive.Therefore,
How a kind of inspection three-phase alternating current that based on threephase potential transformer is able to achieve high performance-price ratio that high-precision quickly detect is designed
It is pressed with valid value detection circuit scheme, is undoubtedly had a good application prospect, this is also starting point of the invention.
Summary of the invention
The purpose of the present invention is in view of the deficienciess of the prior art, proposing a kind of three-phase alternating voltage based on mutual inductor
High-precision quick detection circuit.The circuit is made of the super rectification circuit of three-phase bridge, ac voltage signal processing circuit, core
Device uses threephase potential transformer, super diodes three-phase bridge rectifier circuit and the output letter based on operational amplifier
Number processing circuit etc., the circuit can high-precisions, wide scope, in real time the detection effective value signal of three-phase alternating voltage.
Three-phase alternating voltage high-precision quick detection circuit based on mutual inductor includes the super rectification circuit of three-phase bridge, friendship
Flow voltage signal processing circuit.
The super rectification circuit of three-phase bridge includes the positive amplifier of positive amplifier IC1, the B phase of threephase potential transformer VS1, A phase
The positive diode of positive amplifier IC3, A phase negative sense amplifier IC4, B phase negative sense amplifier IC5, C phase negative sense amplifier IC6, the A phase of IC2, C phase
Positive positive diode D3, A phase negative diode D4, B phase negative diode D5, C phase negative diode D6, A phase of diode D2, C phase of D1, B phase
Divider resistance R5 in divider resistance R4, C phase under divider resistance R3, B phase in divider resistance R2, B phase under upper divider resistance R1, A phase,
Divider resistance R6, A phase filter capacitor C1, B phase filter capacitor C2, C phase filter capacitor C3 under C phase, threephase potential transformer VS1's
Primary side A phase holds the end AL to connect with the A phase in tested three-phase circuit, the primary side B phase and tested three-phase electricity of threephase potential transformer VS1
B phase in road holds the end BL to connect, and primary side C phase and the C phase in tested three-phase circuit of threephase potential transformer VS1 holds the end CL to connect
It connects,
The end phase output terminal a A of threephase potential transformer VS1 is connect with one end of divider resistance R1 in A phase, is divided in A phase
The other end of resistance R1 with one end of divider resistance R2 under A phase, one end of A phase filter capacitor C1, the positive amplifier IC1 of A phase just
The end the positive input terminal IN+ connection at the end input terminal IN+, A phase negative sense amplifier IC4, the other end of divider resistance R2 is filtered with A phase under A phase
The wave capacitor C1 other end is grounded, and the end positive power source terminal+V of the positive amplifier IC1 of A phase is connect with the end circuit positive power source terminal+Vcc, A phase
The end negative power end-V of positive amplifier IC1 is connect with the end circuit negative power end-Vss, the output end OUT terminal of the positive amplifier IC1 of A phase
Connect with the anode of the positive diode D1 of A phase, the end negative input end IN- of A phase forward direction amplifier IC1 and A phase just the cathode of diode D1,
The cathode of the positive diode D2 of B phase, the cathode of the positive diode D3 of C phase, the end negative input end IN- of the positive amplifier IC2 of B phase, C phase are positive
One end connection at the end negative input end IN- of amplifier IC2, upper dead resistance R7, the end positive power source terminal+V of A phase negative sense amplifier IC4 with
The connection of the circuit end positive power source terminal+Vcc, the end negative power end-V of A phase negative sense amplifier IC4 are connect with the end circuit negative power end-Vss, A
The output end OUT terminal of phase negative sense amplifier IC4 is connect with the cathode of A phase negative diode D4, the negative input end of A phase negative sense amplifier IC4
It is transported with the anode of A phase negative diode D4, the anode of B phase negative diode D5, the anode of C phase negative diode D6, B phase negative sense at the end IN-
One end connection at the end negative input end IN- of IC5, the end negative input end IN- of C phase negative sense amplifier IC6, lower dead resistance R9 is put,
The end phase output terminal b B of threephase potential transformer VS1 is connect with one end of divider resistance R3 in B phase, is divided in B phase
The other end of resistance R3 with one end of divider resistance R4 under B phase, one end of B phase filter capacitor C2, the positive amplifier IC2 of B phase just
The end the positive input terminal IN+ connection at the end input terminal IN+, B phase negative sense amplifier IC5, the other end of divider resistance R4 is filtered with B phase under B phase
The other end of wave capacitor C2 is grounded, and the end positive power source terminal+V of the positive amplifier IC2 of B phase is connect with the end circuit positive power source terminal+Vcc, B
Mutually the end negative power end-V of positive amplifier IC2 is connect with the end circuit negative power end-Vss, the output end OUT of the positive amplifier IC2 of B phase
It holds and is connect with the anode of the positive diode D2 of B phase, the end positive power source terminal+V and the end circuit positive power source terminal+Vcc of B phase negative sense amplifier IC5
Connection, the end negative power end-V of B phase negative sense amplifier IC5 are connect with the end circuit negative power end-Vss, and B phase negative sense amplifier IC5's is defeated
Outlet OUT terminal is connect with the cathode of B phase negative diode D5,
The end phase output terminal c C of threephase potential transformer VS1 is connect with one end of divider resistance R5 in C phase, is divided in C phase
The other end of resistance R5 with one end of divider resistance R6 under C phase, one end of C phase filter capacitor C3, the positive amplifier IC3 of C phase just
The end the positive input terminal IN+ connection at the end input terminal IN+, C phase negative sense amplifier IC6, the other end of divider resistance R6 is filtered with C phase under C phase
The other end of wave capacitor C3 is grounded, and the end positive power source terminal+V of the positive amplifier IC3 of C phase is connect with the end circuit positive power source terminal+Vcc, C
Mutually the end negative power end-V of positive amplifier IC3 is connect with the end circuit negative power end-Vss, the output end OUT of the positive amplifier IC3 of C phase
It holds and is connect with the anode of the positive diode D3 of C phase, the end positive power source terminal+V and the end circuit positive power source terminal+Vcc of C phase negative sense amplifier IC6
Connection, the end negative power end-V of C phase negative sense amplifier IC6 are connect with the end circuit negative power end-Vss, and C phase negative sense amplifier IC6's is defeated
Outlet OUT terminal is connect with the cathode of C phase negative diode D6.
Ac voltage signal processing circuit includes output amplifier IC7, upper dead resistance R7, anode resistance R8, lower rectified current
Hinder R9, feedback resistance R10, anode capacitor C4, feedback capacity C5, positive supply capacitor C6, negative supply capacitor C7, upper dead resistance R7
The other end and one end of anode resistance R8, one end of anode capacitor C4, the end positive input terminal IN+ that exports amplifier IC7 connect, just
One end of the other end of resistance R8, the other end of anode capacitor C4, one end of positive supply capacitor C6, negative supply capacitor C7 is held to connect
The other end on ground, negative supply capacitor C7 is connect with the end circuit negative power end-Vss, export amplifier IC7 the end negative input end IN- with
One end connection of the other end of lower dead resistance R9, one end of feedback resistance R10, feedback capacity C5, exports the positive electricity of amplifier IC7
The end source+V is connect with the other end of the end circuit positive power source terminal+Vcc, positive supply capacitor C6, exports the negative power end-V of amplifier IC7
End is connect with the end circuit negative power end-Vss, exports the output end OUT terminal of amplifier IC7 and the other end of feedback resistance R10, feedback
The other end of capacitor C5, the connection of the end circuit output end Uout.
Beneficial effects of the present invention are as follows:
Detection circuit of the present invention based on super diodes three-phase bridge rectification filter circuit and operational amplifier etc.
Scheme, can fully meet the high-precision of the three-phase alternating voltage virtual value based on threephase potential transformer, wide scope it is real-time
Testing requirements.The circuit is simple, at low cost, high reliablity, versatility are good, is easy to commercialization.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, the three-phase alternating voltage high-precision quick detection circuit based on mutual inductor, including three-phase bridge are super
Rectification circuit, ac voltage signal processing circuit.
The super rectification circuit of three-phase bridge includes the positive amplifier of positive amplifier IC1, the B phase of threephase potential transformer VS1, A phase
The positive diode of positive amplifier IC3, A phase negative sense amplifier IC4, B phase negative sense amplifier IC5, C phase negative sense amplifier IC6, the A phase of IC2, C phase
Positive positive diode D3, A phase negative diode D4, B phase negative diode D5, C phase negative diode D6, A phase of diode D2, C phase of D1, B phase
Divider resistance R5 in divider resistance R4, C phase under divider resistance R3, B phase in divider resistance R2, B phase under upper divider resistance R1, A phase,
Divider resistance R6, A phase filter capacitor C1, B phase filter capacitor C2, C phase filter capacitor C3 under C phase, threephase potential transformer VS1's
Primary side A phase holds the end AL to connect with the A phase in tested three-phase circuit, the primary side B phase and tested three-phase electricity of threephase potential transformer VS1
B phase in road holds the end BL to connect, and primary side C phase and the C phase in tested three-phase circuit of threephase potential transformer VS1 holds the end CL to connect
It connects,
The end phase output terminal a A of threephase potential transformer VS1 is connect with one end of divider resistance R1 in A phase, is divided in A phase
The other end of resistance R1 with one end of divider resistance R2 under A phase, one end of A phase filter capacitor C1, the positive amplifier IC1 of A phase just
The end the positive input terminal IN+ connection at the end input terminal IN+, A phase negative sense amplifier IC4, the other end of divider resistance R2 is filtered with A phase under A phase
The wave capacitor C1 other end is grounded, and the end positive power source terminal+V of the positive amplifier IC1 of A phase is connect with the end circuit positive power source terminal+Vcc, A phase
The end negative power end-V of positive amplifier IC1 is connect with the end circuit negative power end-Vss, the output end OUT terminal of the positive amplifier IC1 of A phase
Connect with the anode of the positive diode D1 of A phase, the end negative input end IN- of A phase forward direction amplifier IC1 and A phase just the cathode of diode D1,
The cathode of the positive diode D2 of B phase, the cathode of the positive diode D3 of C phase, the end negative input end IN- of the positive amplifier IC2 of B phase, C phase are positive
One end connection at the end negative input end IN- of amplifier IC2, upper dead resistance R7, the end positive power source terminal+V of A phase negative sense amplifier IC4 with
The connection of the circuit end positive power source terminal+Vcc, the end negative power end-V of A phase negative sense amplifier IC4 are connect with the end circuit negative power end-Vss, A
The output end OUT terminal of phase negative sense amplifier IC4 is connect with the cathode of A phase negative diode D4, the negative input end of A phase negative sense amplifier IC4
It is transported with the anode of A phase negative diode D4, the anode of B phase negative diode D5, the anode of C phase negative diode D6, B phase negative sense at the end IN-
One end connection at the end negative input end IN- of IC5, the end negative input end IN- of C phase negative sense amplifier IC6, lower dead resistance R9 is put,
The end phase output terminal b B of threephase potential transformer VS1 is connect with one end of divider resistance R3 in B phase, is divided in B phase
The other end of resistance R3 with one end of divider resistance R4 under B phase, one end of B phase filter capacitor C2, the positive amplifier IC2 of B phase just
The end the positive input terminal IN+ connection at the end input terminal IN+, B phase negative sense amplifier IC5, the other end of divider resistance R4 is filtered with B phase under B phase
The other end of wave capacitor C2 is grounded, and the end positive power source terminal+V of the positive amplifier IC2 of B phase is connect with the end circuit positive power source terminal+Vcc, B
Mutually the end negative power end-V of positive amplifier IC2 is connect with the end circuit negative power end-Vss, the output end OUT of the positive amplifier IC2 of B phase
It holds and is connect with the anode of the positive diode D2 of B phase, the end positive power source terminal+V and the end circuit positive power source terminal+Vcc of B phase negative sense amplifier IC5
Connection, the end negative power end-V of B phase negative sense amplifier IC5 are connect with the end circuit negative power end-Vss, and B phase negative sense amplifier IC5's is defeated
Outlet OUT terminal is connect with the cathode of B phase negative diode D5,
The end phase output terminal c C of threephase potential transformer VS1 is connect with one end of divider resistance R5 in C phase, is divided in C phase
The other end of resistance R5 with one end of divider resistance R6 under C phase, one end of C phase filter capacitor C3, the positive amplifier IC3 of C phase just
The end the positive input terminal IN+ connection at the end input terminal IN+, C phase negative sense amplifier IC6, the other end of divider resistance R6 is filtered with C phase under C phase
The other end of wave capacitor C3 is grounded, and the end positive power source terminal+V of the positive amplifier IC3 of C phase is connect with the end circuit positive power source terminal+Vcc, C
Mutually the end negative power end-V of positive amplifier IC3 is connect with the end circuit negative power end-Vss, the output end OUT of the positive amplifier IC3 of C phase
It holds and is connect with the anode of the positive diode D3 of C phase, the end positive power source terminal+V and the end circuit positive power source terminal+Vcc of C phase negative sense amplifier IC6
Connection, the end negative power end-V of C phase negative sense amplifier IC6 are connect with the end circuit negative power end-Vss, and C phase negative sense amplifier IC6's is defeated
Outlet OUT terminal is connect with the cathode of C phase negative diode D6.
Ac voltage signal processing circuit includes output amplifier IC7, upper dead resistance R7, anode resistance R8, lower rectified current
Hinder R9, feedback resistance R10, anode capacitor C4, feedback capacity C5, positive supply capacitor C6, negative supply capacitor C7, upper dead resistance R7
The other end and one end of anode resistance R8, one end of anode capacitor C4, the end positive input terminal IN+ that exports amplifier IC7 connect, just
One end of the other end of resistance R8, the other end of anode capacitor C4, one end of positive supply capacitor C6, negative supply capacitor C7 is held to connect
The other end on ground, negative supply capacitor C7 is connect with the end circuit negative power end-Vss, export amplifier IC7 the end negative input end IN- with
One end connection of the other end of lower dead resistance R9, one end of feedback resistance R10, feedback capacity C5, exports the positive electricity of amplifier IC7
The end source+V is connect with the other end of the end circuit positive power source terminal+Vcc, positive supply capacitor C6, exports the negative power end-V of amplifier IC7
End is connect with the end circuit negative power end-Vss, exports the output end OUT terminal of amplifier IC7 and the other end of feedback resistance R10, feedback
The other end of capacitor C5, the connection of the end circuit output end Uout.
Used in the present invention includes positive amplifier IC2, the C phase of positive amplifier IC1, the B phase of threephase potential transformer VS1, A phase
Positive amplifier IC3, A phase negative sense amplifier IC4, B phase negative sense amplifier IC5, C phase negative sense amplifier IC6, output amplifier IC7, A phase positive two
Positive positive diode D3, A phase negative diode D4, B phase negative diode D5, C phase negative diode D6 of diode D2, C phase of pole pipe D1, B phase
It is all made of existing matured product；Threephase potential transformer VS1 is using KJSZF7 series, the positive fortune of positive amplifier IC1, the B phase of A phase
Put positive amplifier IC3, A phase negative sense amplifier IC4, B phase negative sense amplifier IC5, the C phase negative sense amplifier IC6 of IC2, C phase, output amplifier IC7
Using TLC2264, positive positive minus two pole of diode D3, A phase negative diode D4, B phase of diode D2, C phase of positive diode D1, B phase of A phase
Pipe D5, C phase negative diode D6 use IN4148.
Main circuit parameter matching relationship in the present invention is as follows:
If: each phase output terminal voltage signal of threephase potential transformer VS1 is respectively
(unit: V), UxFor tested three-phase alternating voltage virtual value (unit:
V), kvFor the nameplate parameter no-load voltage ratio of voltage transformer VS1.
It enables: R1=R3=R5 (1)
R2=R4=R6 (2)
C1=C2=C3 (3)
C4=C5 (4)
R7=R9 (5)
R8=R10 (6)
Uoutmax≤Vcc (9)
R in formula1、R2Respectively in A phase under divider resistance R1, A phase divider resistance R2 resistance value (unit: Ω), R3、R4
Distinguish the resistance value (unit: Ω) of divider resistance R4 under divider resistance R3, B phase in B phase, R5、R6Divider resistance R5, C in C phase respectively
The resistance value (unit: Ω) of divider resistance R6, R under phase7、R8、R9、R10Respectively upper dead resistance R7, anode resistance R8, lower rectification
The resistance value (unit: Ω) of resistance R9, feedback resistance R10, UxmaxFor the maximum virtual value (unit: V) of measured voltage, Uout、
UoutmaxThe voltage signal and its maximum value (unit: V) of circuit output respectively of the present invention, VccIt is (single for circuit voltage value
Position: V).
Formula (10) is the relational expression between circuit output voltage signal and measured voltage virtual value of the present invention.
The course of work of the present invention is as follows:
(1) three-phase bridge super diodes rectification circuit: by tested three-phase voltage through threephase potential transformer VS1 every
From with export three-phase voltage signal after decompression (unit: V), then through each phase resistance
Partial pressure (such as:Make after divider resistance R2 partial pressure and filtering under divider resistance R1, A phase in A phase
Maximum amplitude is no more than circuit supply voltage VccValue), by by super diodes three-phase bridge rectifier circuit export rectify
Voltage signal(unit: V).
(2) ac voltage signal processing circuit: above-mentioned Ud0=U0f-U0n=2.34kvUxSignal is passed through to export amplifier IC7
To export the measured voltage virtual value U as shown in formula (10) after the filtered in-phase amplifying circuit processing of corexDirectly proportional voltage letter
Number.
Attached: the explanation about super diodes: so-called super diodes are exactly the positive amplifier IC1 and A of A phase as shown in figure 1
What is constituted to positive diode unidirectionally follows circuit link, which is mainly characterized by overcoming the existing conducting pressure of diode
Drop, theoretically becomes the ideal active diode of zero pressure drop, and this circuit link is known as super diodes.
Claims (3)
1. the three-phase alternating voltage high-precision quick detection circuit based on mutual inductor, including the super rectification circuit of three-phase bridge, friendship
Flow voltage signal processing circuit, it is characterised in that:
The super rectification circuit of three-phase bridge includes positive amplifier IC2, C of positive amplifier IC1, the B phase of threephase potential transformer VS1, A phase
Mutually positive positive diode D1, B phase of amplifier IC3, A phase negative sense amplifier IC4, B phase negative sense amplifier IC5, C phase negative sense amplifier IC6, A phase
It is divided in positive positive diode D3, A phase negative diode D4, B phase negative diode D5, C phase negative diode D6, A phase of diode D2, C phase
Under resistance R1, A phase in divider resistance R2, B phase under divider resistance R3, B phase in divider resistance R4, C phase under divider resistance R5, C phase
The primary side A of divider resistance R6, A phase filter capacitor C1, B phase filter capacitor C2, C phase filter capacitor C3, threephase potential transformer VS1
Mutually the end AL is held to connect with the A phase in tested three-phase circuit, in the primary side B phase of threephase potential transformer VS1 and tested three-phase circuit
B phase hold the end BL to connect, the primary side C phase of threephase potential transformer VS1 holds the end CL to connect with the C phase in tested three-phase circuit；
The end phase output terminal a A of threephase potential transformer VS1 is connect with one end of divider resistance R1 in A phase, divider resistance in A phase
The other end of R1 and one end of divider resistance R2 under A phase, one end of A phase filter capacitor C1, the positive amplifier IC1 of A phase positive input
The end the positive input terminal IN+ connection at the end IN+, A phase negative sense amplifier IC4 is held, the other end, the A phase filter capacitor of divider resistance R2 under A phase
The C1 other end is grounded, and the end positive power source terminal+V of the positive amplifier IC1 of A phase is connect with the end circuit positive power source terminal+Vcc, the positive fortune of A phase
The end negative power end-V for putting IC1 is connect with the end circuit negative power end-Vss, the output end OUT terminal and A phase of the positive amplifier IC1 of A phase
The anode connection of positive diode D1, the end negative input end IN- of the positive amplifier IC1 of A phase with A the phase just cathode of diode D1, B phase just
The cathode of the positive diode D3 of the cathode of diode D2, C phase, the end negative input end IN- of the positive amplifier IC2 of B phase, the positive amplifier of C phase
One end connection at the end negative input end IN-, upper dead resistance R7 of IC2, the end positive power source terminal+V of A phase negative sense amplifier IC4 and circuit
The connection of the end positive power source terminal+Vcc, the end negative power end-V of A phase negative sense amplifier IC4 are connect with the end circuit negative power end-Vss, and A phase is born
It is connect to the output end OUT terminal of amplifier IC4 with the cathode of A phase negative diode D4, the end negative input end IN- of A phase negative sense amplifier IC4
With the anode of A phase negative diode D4, the anode of B phase negative diode D5, the anode of C phase negative diode D6, B phase negative sense amplifier IC5
The end negative input end IN-, the end negative input end IN- of C phase negative sense amplifier IC6, lower dead resistance R9 one end connection,
The end phase output terminal b B of threephase potential transformer VS1 is connect with one end of divider resistance R3 in B phase, divider resistance in B phase
The other end of R3 and one end of divider resistance R4 under B phase, one end of B phase filter capacitor C2, the positive amplifier IC2 of B phase positive input
The end the positive input terminal IN+ connection at the end IN+, B phase negative sense amplifier IC5 is held, the other end, the B phase filter capacitor of divider resistance R4 under B phase
The other end of C2 is grounded, and the end positive power source terminal+V of the positive amplifier IC2 of B phase is connect with the end circuit positive power source terminal+Vcc, and B phase is positive
The end negative power end-V of amplifier IC2 is connect with the end circuit negative power end-Vss, the output end OUT terminal and B of the positive amplifier IC2 of B phase
Mutually the anode connection of positive diode D2, the end positive power source terminal+V of B phase negative sense amplifier IC5 are connect with the end circuit positive power source terminal+Vcc, B
The end negative power end-V of phase negative sense amplifier IC5 is connect with the end circuit negative power end-Vss, the output end OUT of B phase negative sense amplifier IC5
End is connect with the cathode of B phase negative diode D5；
The end phase output terminal c C of threephase potential transformer VS1 is connect with one end of divider resistance R5 in C phase, divider resistance in C phase
The other end of R5 and one end of divider resistance R6 under C phase, one end of C phase filter capacitor C3, the positive amplifier IC3 of C phase positive input
The end the positive input terminal IN+ connection at the end IN+, C phase negative sense amplifier IC6 is held, the other end, the C phase filter capacitor of divider resistance R6 under C phase
The other end of C3 is grounded, and the end positive power source terminal+V of the positive amplifier IC3 of C phase is connect with the end circuit positive power source terminal+Vcc, and C phase is positive
The end negative power end-V of amplifier IC3 is connect with the end circuit negative power end-Vss, the output end OUT terminal and C of the positive amplifier IC3 of C phase
Mutually the anode connection of positive diode D3, the end positive power source terminal+V of C phase negative sense amplifier IC6 are connect with the end circuit positive power source terminal+Vcc, C
The end negative power end-V of phase negative sense amplifier IC6 is connect with the end circuit negative power end-Vss, the output end OUT of C phase negative sense amplifier IC6
End is connect with the cathode of C phase negative diode D6；
Ac voltage signal processing circuit include output amplifier IC7, upper dead resistance R7, anode resistance R8, lower dead resistance R9,
Feedback resistance R10, anode capacitor C4, feedback capacity C5, positive supply capacitor C6, negative supply capacitor C7, upper dead resistance R7's is another
One end is connect with the end positive input terminal IN+ of one end of anode resistance R8, one end of anode capacitor C4, output amplifier IC7, anode electricity
Resistance the other end of R8, the other end of anode capacitor C4, one end of positive supply capacitor C6, negative supply capacitor C7 one end be grounded,
The other end of negative supply capacitor C7 is connect with the end circuit negative power end-Vss, and the end negative input end IN- for exporting amplifier IC7 is whole under
One end connection of the other end of leakage resistance R9, one end of feedback resistance R10, feedback capacity C5, exports the positive power source terminal of amplifier IC7
The end+V is connect with the other end of the end circuit positive power source terminal+Vcc, positive supply capacitor C6, export amplifier IC7 the end negative power end-V with
The connection of the circuit end negative power end-Vss, exports the output end OUT terminal of amplifier IC7 and the other end of feedback resistance R10, feedback capacity
The other end of C5, the connection of the end circuit output end Uout.
2. the three-phase alternating voltage high-precision quick detection circuit according to claim 1 based on mutual inductor, feature exist
It is as follows in circuit parameter matching relationship:
If: each phase output terminal voltage signal of threephase potential transformer VS1 is respectively
UxFor tested three-phase alternating voltage virtual value, kvFor the nameplate parameter no-load voltage ratio of threephase potential transformer VS1；
It enables: R1=R3=R5 (1)
R2=R4=R6 (2)
C1=C2=C3 (3)
C4=C5 (4)
R7=R9 (5)
R8=R10 (6)
Uoutmax≤Vcc (9)
R in formula1、R2Respectively in A phase under divider resistance R1, A phase divider resistance R2 resistance value, R3、R4Electricity is divided in B phase respectively
Hinder the resistance value of divider resistance R4 under R3, B phase, R5、R6Distinguish the resistance value of divider resistance R6 under divider resistance R5, C phase in C phase, R7、
R8、R9、R10The resistance value of respectively upper dead resistance R7, anode resistance R8, lower dead resistance R9, feedback resistance R10, UxmaxFor quilt
Survey the maximum virtual value of voltage, Uout、UoutmaxThe voltage signal and its maximum value of circuit output respectively, VccFor circuit supply voltage
Value；Formula (10) is the relational expression between circuit output voltage signal and measured voltage virtual value.
3. the three-phase alternating voltage high-precision quick detection circuit according to claim 1 or 2 based on mutual inductor, feature
It is positive amplifier IC3, the A phase negative sense fortune of positive amplifier IC2, the C phase of positive amplifier IC1, the B phase of threephase potential transformer VS1, A phase
Put positive positive diode D2, the C of diode D1, B phase of IC4, B phase negative sense amplifier IC5, C phase negative sense amplifier IC6, output amplifier IC7, A phase
Mutually positive diode D3, A phase negative diode D4, B phase negative diode D5, C phase negative diode D6 is all made of existing matured product；Three
Phase voltage mutual inductor VS1 is using KJSZF7 series, positive amplifier IC3, A of positive amplifier IC2, the C phase of positive amplifier IC1, the B phase of A phase
Phase negative sense amplifier IC4, B phase negative sense amplifier IC5, C phase negative sense amplifier IC6, output amplifier IC7 use TLC2264, positive two pole of A phase
Positive positive diode D3, A phase negative diode D4, B phase negative diode D5, C phase negative diode D6 of diode D2, C phase of pipe D1, B phase is adopted
Use IN4148.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910754226.3A CN110333384B (en) | 2019-08-15 | 2019-08-15 | Three-phase alternating current voltage high-precision rapid detection circuit based on mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910754226.3A CN110333384B (en) | 2019-08-15 | 2019-08-15 | Three-phase alternating current voltage high-precision rapid detection circuit based on mutual inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110333384A true CN110333384A (en) | 2019-10-15 |
| CN110333384B CN110333384B (en) | 2021-04-13 |
Family
ID=68149718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910754226.3A Active CN110333384B (en) | 2019-08-15 | 2019-08-15 | Three-phase alternating current voltage high-precision rapid detection circuit based on mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110333384B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021208154A1 (en) * | 2020-04-15 | 2021-10-21 | 深圳市汇川技术股份有限公司 | Ac voltage detection circuit and power electronic device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102662095A (en) * | 2012-05-07 | 2012-09-12 | 无锡智卓电气有限公司 | Three-phase voltage sampling circuit |
| CN102680766A (en) * | 2012-05-07 | 2012-09-19 | 无锡智卓电气有限公司 | Three-phase voltage sampling circuit for control and protection switches |
| CN102928706A (en) * | 2012-10-30 | 2013-02-13 | 河南科技大学 | Alternating current acquisition device and data acquisition method thereof |
| US8803508B2 (en) * | 2009-10-20 | 2014-08-12 | Mitsubishi Electric Corporation | Semiconductor device and error detector |
| CN205280802U (en) * | 2015-12-28 | 2016-06-01 | 先控捷联电气股份有限公司 | Three phase three wire system voltage sampling circuit |
| CN205450229U (en) * | 2015-12-25 | 2016-08-10 | 施耐德万高（天津）电气设备有限公司 | Three -phase AC transfer circuit of sampling |
-
2019
- 2019-08-15 CN CN201910754226.3A patent/CN110333384B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8803508B2 (en) * | 2009-10-20 | 2014-08-12 | Mitsubishi Electric Corporation | Semiconductor device and error detector |
| CN102662095A (en) * | 2012-05-07 | 2012-09-12 | 无锡智卓电气有限公司 | Three-phase voltage sampling circuit |
| CN102680766A (en) * | 2012-05-07 | 2012-09-19 | 无锡智卓电气有限公司 | Three-phase voltage sampling circuit for control and protection switches |
| CN102928706A (en) * | 2012-10-30 | 2013-02-13 | 河南科技大学 | Alternating current acquisition device and data acquisition method thereof |
| CN205450229U (en) * | 2015-12-25 | 2016-08-10 | 施耐德万高（天津）电气设备有限公司 | Three -phase AC transfer circuit of sampling |
| CN205280802U (en) * | 2015-12-28 | 2016-06-01 | 先控捷联电气股份有限公司 | Three phase three wire system voltage sampling circuit |
Non-Patent Citations (1)
| Title |
|---|
| 陈杰 等: "三相电流监测系统的设计", 《实验技术与管理》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021208154A1 (en) * | 2020-04-15 | 2021-10-21 | 深圳市汇川技术股份有限公司 | Ac voltage detection circuit and power electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110333384B (en) | 2021-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI258262B (en) | Power detection circuit capable of reducing power consumption under standby state | |
| CN106208668B (en) | Pfc circuit, PFC control circuit and Switching Power Supply | |
| CN107677873B (en) | A kind of transmission line of electricity current detection means | |
| CN207096292U (en) | A kind of alternating current-direct current pincer watch circuit | |
| CN110333384A (en) | Three-phase alternating voltage high-precision quick detection circuit based on mutual inductor | |
| CN109738695A (en) | Based on data acquisition can automatic identification alternating current-direct current signal electric power measurement device | |
| CN107979066A (en) | Type B leakage circuit breakers and its detection method | |
| CN206117500U (en) | PFC circuit, PFC control circuit and switching power supply | |
| CN205450098U (en) | Current transformer module | |
| CN209690403U (en) | Based on data acquisition can automatic identification alternating current-direct current signal electric power measurement device | |
| CN110333383B (en) | Single-phase alternating-current voltage high-precision rapid detection circuit based on mutual inductor | |
| CN107017637B (en) | A kind of simplified modeling evaluating method of three phase rectifier unit harmonic power | |
| CN206294093U (en) | A kind of high_voltage isolation detection control circuit of high-frequency and high-voltage power supply | |
| CN206470327U (en) | Harmonic measuring device based on wavelet analysis during three-phase imbalance | |
| CN205594111U (en) | Leakage detection appearance based on rogowski coil | |
| CN107817463A (en) | A kind of electricity anti-theft method for detecting short circuit electric energy meter | |
| CN207625283U (en) | Type B leakage circuit breakers | |
| CN204855631U (en) | Alternating current virtual value detection circuitry | |
| CN201038738Y (en) | Electronic motor protection device signal sampling circuit | |
| CN110361591A (en) | Three-phase alternating current high-precision quick detection circuit based on mutual inductor | |
| CN209372934U (en) | More closed control circuits of fluxgate current sensor | |
| CN102769271A (en) | Output protection circuit for alternating-current power supply | |
| CN106199165A (en) | Hand over orthogonal circuit intermediate DC link transient current detection method and locomotive | |
| CN207571188U (en) | A kind of direct current measuring devices | |
| CN110376397A (en) | The quick tachometer circuit of single-phase asynchronous AC tachometer generator high-precision |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220218 Address after: Room 2242, No. 3, Xuanhua Road, Changning District, Shanghai 200050 Patentee after: CHINA ELECTRONIC SYSTEMS TECHNOLOGY Co.,Ltd. Address before: 310018 No. 2 street, Xiasha Higher Education Zone, Hangzhou, Zhejiang Patentee before: HANGZHOU DIANZI University |
|
| TR01 | Transfer of patent right |