CN109510613A - A kind of 3 phase AC solid relay circuit with short-circuit protection - Google Patents
A kind of 3 phase AC solid relay circuit with short-circuit protection Download PDFInfo
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- CN109510613A CN109510613A CN201811444604.XA CN201811444604A CN109510613A CN 109510613 A CN109510613 A CN 109510613A CN 201811444604 A CN201811444604 A CN 201811444604A CN 109510613 A CN109510613 A CN 109510613A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/08108—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit in thyristor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
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Abstract
The present invention relates to a kind of 3 phase AC solid relay circuit with short-circuit protection.Circuit of the present invention includes light every formula three-phase alternating current TRIAC driving circuit, three-phase shortcircuit and overload telemetry circuit.Specifically include A phase, B phase and C phase optocoupler, inverse-impedance type thyristor, A phase, B phase and C phase bidirectional thyristor, A phase, B phase and C phase inductance L3, A phase, B phase and C phase current sensor SC1, diode D1~diode D6.Ball bearing made scheme of the present invention based on three optocouplers, three bidirectional thyristors, an inverse-impedance type thyristor, three small inductors, three current sensors etc. can fully meet to the three-phase alternating current load short circuits or the reliable real-time guard requirement of over current fault progress in 3 phase AC solid relay circuit.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 intersections with short-circuit protection
Solid-state relay circuit is flowed, the application of the noncontacting switch control suitable for three-phase alternating-current powered or driving circuit.
Background technique
Non-contact type solid-state relay has many advantages, such as that no mechanical contact, response is rapid, the service life is long and obtains day due to it
Benefit is widely applied.But with bidirectional thyristor (TRIAC) be power control device 3 phase AC solid relay at present to short
Road or overload fault still lack the product with reliable self-protection function, in spite of setting in some relevant technical reports
Current detecting and breaking circuit, but three-phase alternating current load short circuits or overload fault for occurring suddenly are set, these circuits can not
It is protected in time and causes to damage, main problem is in existing 3 phase AC solid relay circuit itself prominent to electric current
Become unrestraint ability.Therefore, how to design a kind of can reliably carry out short circuit and overload protection, circuit is simple, is easy to commercialization
3 phase AC solid relay scheme is 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 that a kind of three-phase alternating current with short-circuit protection is solid
State relay circuit.The circuit is made of light every formula three-phase alternating current TRIAC driving circuit, three-phase shortcircuit and overload telemetry circuit,
It is power control device and concatenation small inductor to inhibit current break that its core, which is every phase with a bidirectional thyristor (TRIAC),
Configure current sensor, and with inverse-impedance type thyristor be protection control device, the circuit three-phase alternating current load occur short circuit or
Shutdown protection can be reliably carried out when overload.
Circuit of the present invention includes light every formula three-phase alternating current TRIAC driving circuit, three-phase shortcircuit and overload telemetry circuit.
Light includes that A phase optocoupler IC1, B phase optocoupler IC2, C phase optocoupler IC3, A phase are double every formula three-phase alternating current TRIAC driving circuit
To thyristor VT2, B phase bidirectional thyristor VT3, C phase bidirectional thyristor VT4, A phase inductance L1, B phase inductance L2, C phase inductance L3, A
Mutually driving capacitor C1, A phase protects capacitor C2, B phase that capacitor C3, B phase is driven to protect capacitor C4, C phase that capacitor C5, C phase is driven to protect
Capacitor C6, current-limiting resistance R1, A fail to agree right resistance R3, A phase gate electrode resistance R4, A phase protective resistance R5, B of resistance R2, A phase and fail to agree electricity
Resistance right resistance R7, B phase gate electrode resistance R8, B phase protective resistance R9, C of R6, B phase fails to agree right resistance R11, C the phase door of resistance R10, C phase
Electrode resistance R12, C phase protective resistance R13, A phase load Load-A, B phase load Load-B, C phase load Load-C, it is positive to drive end IN
+ end is connect with one end of current-limiting resistance R1, and the other end of current-limiting resistance R1 and anode, the inverse-impedance type of A phase optocoupler IC1 emission side are brilliant
The anode of brake tube VT1 connects, and the cathode of A phase optocoupler IC1 emission side is connect with the anode of B phase optocoupler IC2 emission side, B phase optocoupler
The cathode of IC2 emission side is connect with the anode of C phase optocoupler IC3 emission side, and the cathode and inverse-impedance type of C phase optocoupler IC3 emission side are brilliant
The cathode of brake tube VT1, the connection of the negative driving end end IN-.
One end of A phase optocoupler IC1 outlet side is connect with the one end for failing to agree resistance R2 A, A phase optocoupler IC1 outlet side it is another
End is connect with the gate pole of one end of A phase gate electrode resistance R4, A phase bidirectional thyristor VT2, and AC power source A phase holds the end A and A phase inductance
One end of L1 connects, 1st anode of the other end of A phase inductance L1 with A phase bidirectional thyristor VT2, one end of the right resistance R3 of A phase, A
One end of phase protective resistance R5 connects, and the other end and the A of the right resistance R3 of A phase fail to agree the other end of resistance R2, A phase drives capacitor C1
One end connection, one end line of A phase load Load-A after the inspection hole of A phase current sensor SC1 with the two-way crystalline substance lock of A phase
The 2nd anode of pipe VT2, the other end of A phase gate electrode resistance R4, A phase drive the other end of capacitor C1, A phase to protect the one of capacitor C2
End connection, A phase protect the other end of capacitor C2 and the other end of A phase protective resistance R5 to connect.
One end of B phase optocoupler IC2 outlet side is connect with the one end for failing to agree resistance R6 B, B phase optocoupler IC2 outlet side it is another
End is connect with the gate pole of one end of B phase gate electrode resistance R8, B phase bidirectional thyristor VT2, and AC power source B phase holds the end B and B inductance L2
One end connection, 1st anode of the other end of B phase inductance L2 with B phase bidirectional thyristor VT3, one end of the right resistance R7 of B phase, B phase
One end of protective resistance R9 connects, and the other end and the B of the right resistance R7 of B phase fail to agree the other end of resistance R6, B phase drives capacitor C3's
One end connection, one end line of B phase load Load-B after the inspection hole of B phase current sensor SC2 with B phase bidirectional thyristor
The 2nd anode of VT3, the other end of B phase gate electrode resistance R8, B phase drive the other end of capacitor C3, B phase to protect one end of capacitor C4
Connection, B phase protect the other end of capacitor C4 and the other end of B phase protective resistance R9 to connect.
One end of C phase optocoupler IC3 outlet side is connect with the one end for failing to agree resistance R10 C, C phase optocoupler IC3 outlet side it is another
End is connect with the gate pole of one end of C phase gate electrode resistance R12, C phase bidirectional thyristor VT4, and AC power source C phase holds C-terminal and C phase inductance
One end of L3 connects, the 1st anode of the other end of C phase inductance L3 and C phase bidirectional thyristor VT4, the right resistance R11 of C phase one end,
One end of C phase protective resistance R13 connects, and the other end and the C of the right resistance R11 of C phase fail to agree the other end of resistance R10, C phase drives electricity
Hold one end connection of C5, one end line of C phase load Load-C is two-way with C phase after the inspection hole of C phase current sensor SC3
The 2nd anode of thyristor VT4, the other end of C phase gate electrode resistance R12, C phase drive the other end of capacitor C5, C phase to protect capacitor C6
One end connection, C phase protects the other end of capacitor C6 and the other end of C phase protective resistance R13 to connect.
In three-phase three-wire system load: the other end of A phase load Load-A is born with the other end of B phase load Load-B, C phase
Carry the other end connection of Load-C.In three-phase four-wire system load: the other end and B phase load Load-B of A phase load Load-A
The other end, C phase load Load-C the other end, AC power source zero line side N-terminal connection.
Three-phase shortcircuit and overload telemetry circuit include that inverse-impedance type thyristor VT1, A phase current sensor SC1, B phase current passes
Two poles under diode D3, B phase in diode D4, B phase under diode D1, A phase in sensor SC2, C phase current sensor SC3, A phase
Diode D2, transfer resistance R14, filter resistance R15, divider resistance R16, filter capacitor under diode D5, C phase in pipe D6, C phase
The 2nd end output end I2 of C7, A phase current sensor SC1 and the 2nd end output end I2 of B phase current sensor SC2, C phase current pass
The 2nd end output end I2 of sensor SC3 connects, the 1st end output end I1 of A phase current sensor SC1 and the sun of diode D1 in A phase
The cathode connection of diode D4, the 1st end output end I1 of B phase current sensor SC2 and the sun of diode D3 in B phase under pole, A phase
The cathode connection of diode D6, the 1st end output end I1 of C phase current sensor SC3 and the sun of diode D5 in C phase under pole, B phase
The cathode connection of diode D2 under pole, C phase, the cathode of diode D1 and two poles in the cathode of diode D3 in B phase, C phase in A phase
One end connection of the cathode of pipe D5, one end of transfer resistance R14, filter resistance R15, the other end and partial pressure of filter resistance R15
The gate pole connection of one end of resistance R16, one end of filter capacitor C7, inverse-impedance type thyristor VT1, the anode of diode D4 under A phase
With the anode of diode D2 under the anode of diode D6, C phase under B phase, the other end of transfer resistance R14, filter capacitor C7 it is another
One end, the other end of divider resistance R16, the connection of the negative driving end end IN-.
Beneficial effects of the present invention are as follows:
The present invention is passed with three bidirectional thyristors (TRIAC), an inverse-impedance type thyristor, three small inductors, three electric currents
Ball bearing made scheme based on sensor etc. can fully meet to the three-phase alternating current load in 3 phase AC solid relay circuit
Short circuit or over current fault carry out reliable real-time guard requirement.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, a kind of 3 phase AC solid relay circuit with short-circuit protection, including light is every formula three-phase alternating current
TRIAC driving circuit, three-phase shortcircuit and overload telemetry circuit.
Light includes that A phase optocoupler IC1, B phase optocoupler IC2, C phase optocoupler IC3, A phase are double every formula three-phase alternating current TRIAC driving circuit
To thyristor VT2, B phase bidirectional thyristor VT3, C phase bidirectional thyristor VT4, A phase inductance L1, B phase inductance L2, C phase inductance L3, A
Mutually driving capacitor C1, A phase protects capacitor C2, B phase that capacitor C3, B phase is driven to protect capacitor C4, C phase that capacitor C5, C phase is driven to protect
Capacitor C6, current-limiting resistance R1, A fail to agree right resistance R3, A phase gate electrode resistance R4, A phase protective resistance R5, B of resistance R2, A phase and fail to agree electricity
Resistance right resistance R7, B phase gate electrode resistance R8, B phase protective resistance R9, C of R6, B phase fails to agree right resistance R11, C the phase door of resistance R10, C phase
Electrode resistance R12, C phase protective resistance R13, A phase load Load-A, B phase load Load-B, C phase load Load-C, it is positive to drive end IN
+ end is connect with one end of current-limiting resistance R1, and the other end of current-limiting resistance R1 and anode, the inverse-impedance type of A phase optocoupler IC1 emission side are brilliant
The anode of brake tube VT1 connects, and the cathode of A phase optocoupler IC1 emission side is connect with the anode of B phase optocoupler IC2 emission side, B phase optocoupler
The cathode of IC2 emission side is connect with the anode of C phase optocoupler IC3 emission side, and the cathode and inverse-impedance type of C phase optocoupler IC3 emission side are brilliant
The cathode of brake tube VT1, the connection of the negative driving end end IN-.
One end of A phase optocoupler IC1 outlet side is connect with the one end for failing to agree resistance R2 A, A phase optocoupler IC1 outlet side it is another
End is connect with the gate pole of one end of A phase gate electrode resistance R4, A phase bidirectional thyristor VT2, and AC power source A phase holds the end A and A phase inductance
One end of L1 connects, 1st anode of the other end of A phase inductance L1 with A phase bidirectional thyristor VT2, one end of the right resistance R3 of A phase, A
One end of phase protective resistance R5 connects, and the other end and the A of the right resistance R3 of A phase fail to agree the other end of resistance R2, A phase drives capacitor C1
One end connection, one end line of A phase load Load-A after the inspection hole of A phase current sensor SC1 with the two-way crystalline substance lock of A phase
The 2nd anode of pipe VT2, the other end of A phase gate electrode resistance R4, A phase drive the other end of capacitor C1, A phase to protect the one of capacitor C2
End connection, A phase protect the other end of capacitor C2 and the other end of A phase protective resistance R5 to connect.
One end of B phase optocoupler IC2 outlet side is connect with the one end for failing to agree resistance R6 B, B phase optocoupler IC2 outlet side it is another
End is connect with the gate pole of one end of B phase gate electrode resistance R8, B phase bidirectional thyristor VT2, and AC power source B phase holds the end B and B inductance L2
One end connection, 1st anode of the other end of B phase inductance L2 with B phase bidirectional thyristor VT3, one end of the right resistance R7 of B phase, B phase
One end of protective resistance R9 connects, and the other end and the B of the right resistance R7 of B phase fail to agree the other end of resistance R6, B phase drives capacitor C3's
One end connection, one end line of B phase load Load-B after the inspection hole of B phase current sensor SC2 with B phase bidirectional thyristor
The 2nd anode of VT3, the other end of B phase gate electrode resistance R8, B phase drive the other end of capacitor C3, B phase to protect one end of capacitor C4
Connection, B phase protect the other end of capacitor C4 and the other end of B phase protective resistance R9 to connect.
One end of C phase optocoupler IC3 outlet side is connect with the one end for failing to agree resistance R10 C, C phase optocoupler IC3 outlet side it is another
End is connect with the gate pole of one end of C phase gate electrode resistance R12, C phase bidirectional thyristor VT4, and AC power source C phase holds C-terminal and C phase inductance
One end of L3 connects, the 1st anode of the other end of C phase inductance L3 and C phase bidirectional thyristor VT4, the right resistance R11 of C phase one end,
One end of C phase protective resistance R13 connects, and the other end and the C of the right resistance R11 of C phase fail to agree the other end of resistance R10, C phase drives electricity
Hold one end connection of C5, one end line of C phase load Load-C is two-way with C phase after the inspection hole of C phase current sensor SC3
The 2nd anode of thyristor VT4, the other end of C phase gate electrode resistance R12, C phase drive the other end of capacitor C5, C phase to protect capacitor C6
One end connection, C phase protects the other end of capacitor C6 and the other end of C phase protective resistance R13 to connect.
In three-phase three-wire system load: the other end of A phase load Load-A is born with the other end of B phase load Load-B, C phase
Carry the other end connection of Load-C.In three-phase four-wire system load: the other end and B phase load Load-B of A phase load Load-A
The other end, C phase load Load-C the other end, AC power source zero line side N-terminal connection.
Three-phase shortcircuit and overload telemetry circuit include that inverse-impedance type thyristor VT1, A phase current sensor SC1, B phase current passes
Two poles under diode D3, B phase in diode D4, B phase under diode D1, A phase in sensor SC2, C phase current sensor SC3, A phase
Diode D2, transfer resistance R14, filter resistance R15, divider resistance R16, filter capacitor under diode D5, C phase in pipe D6, C phase
The 2nd end output end I2 of C7, A phase current sensor SC1 and the 2nd end output end I2 of B phase current sensor SC2, C phase current pass
The 2nd end output end I2 of sensor SC3 connects, the 1st end output end I1 of A phase current sensor SC1 and the sun of diode D1 in A phase
The cathode connection of diode D4, the 1st end output end I1 of B phase current sensor SC2 and the sun of diode D3 in B phase under pole, A phase
The cathode connection of diode D6, the 1st end output end I1 of C phase current sensor SC3 and the sun of diode D5 in C phase under pole, B phase
The cathode connection of diode D2 under pole, C phase, the cathode of diode D1 and two poles in the cathode of diode D3 in B phase, C phase in A phase
One end connection of the cathode of pipe D5, one end of transfer resistance R14, filter resistance R15, the other end and partial pressure of filter resistance R15
The gate pole connection of one end of resistance R16, one end of filter capacitor C7, inverse-impedance type thyristor VT1, the anode of diode D4 under A phase
With the anode of diode D2 under the anode of diode D6, C phase under B phase, the other end of transfer resistance R14, filter capacitor C7 it is another
One end, the other end of divider resistance R16, the connection of the negative driving end end IN-.
Used in the present invention includes A phase optocoupler IC1, B phase optocoupler IC2, C phase optocoupler IC3, A phase current sensor SC1, B
The two-way brilliant lock of phase current sensor SC2, C phase current sensor SC3, inverse-impedance type thyristor VT1, A phase bidirectional thyristor VT2, B phase
Diode under diode D3, B phase in diode D4, B phase under diode D1, A phase in pipe VT3, C phase bidirectional thyristor VT4, A phase
All devices in D6, C phase under diode D5, C phase including diode D2 etc. are all made of existing matured product, can pass through city
Field obtains.Such as: optocoupler uses MOC3083, and current sensor uses LD potline current mutual inductor, and inverse-impedance type thyristor uses
KK1-2 high speed thyristor, bidirectional thyristor is using BCR series, and diode is using SB series Schottky diode etc..
Main circuit parameter matching relationship in the present invention is as follows:
If: UgTHFor the gate trigger voltage threshold value (unit: V) of inverse-impedance type thyristor, A, B, C phase current sensor
Tested electric current and output electric current are I respectively1x、I2x(unit: A), x=A, B, C therein, the electric current ratio of each phase current sensor
It is ki=I2x/I1x, enable: I1xmThe tested electric current I allowed for x phase1xMaximum value (unit: A), and I1Am=I1Bm=I1Cm=
I1m, then:
R15> > R14 (1)
R in formula14、R15、R16Respectively transfer resistance R14, filter resistance R15, divider resistance R16 resistance value (unit:
Ω)。
The course of work of the present invention is as follows:
(1) to the isolation drive control action of three-phase alternating current load: circuit of the present invention has the function of Phototube Coupling, A phase light
The emission side series connection of coupling IC1, B phase optocoupler IC2, C phase optocoupler IC3 is followed by drive control voltage, to ensure that three-phase Simultaneous Switching is dynamic
Make, wherein the anode of positive driving end IN+ termination driving voltage bears the negative terminal of driving end IN- termination driving voltage, and according to light
The rated current of coupling emission side carries out the resistance value of configuration current-limiting resistance R1.In being normally applied, it will can also just drive the end end IN+ and come
It is connected from the supply voltage end of higher level's control circuit, and switch control terminal of the negative driving end end IN- as higher level's control circuit, then
Three-phase optocoupler is all connected when the control terminal is low level, and then three-phase bidirectional thyristor is connected and gives three-phase alternating current load supplying；
Three-phase optocoupler is turned off when the control terminal is high level, and then makes the shutdown of three-phase bidirectional thyristor, three-phase alternating current load power down.
(2) three-phase shortcircuit and overload monitoring and protection effect: no matter short circuit or overload occur for three characteristics of the middle term AC load, protect
The essence of shield is will to turn off three-phase bidirectional thyristor cutting degree three-phase alternating current when electric current is more than the maximum value allowed to load
Power supply.For this purpose, the electric current and its maximum value that permission is arranged are I in the short circuit of circuit of the present invention or overload protection0m, and protect
The threshold value of shield movement.Each circuitry phase is all configured with small inductor simultaneously, to prevent each circuitry phase electric current abrupt transients, so that protection control
Circuit processed can carry out that operation is effectively protected in time.Using three-phase current sensor real-time monitoring load current, once discovery is negative
It carries electric current and reaches I1m, then in the circuit parameter cooperation of formula (1), formula (2) and the diode under diode D1, A phase on A phase
Diode D2, transfer resistance R14, filtered electrical under diode D5, C phase in diode D6, C phase under diode D3, B phase in D4, B phase
Under the effects of resistance R15, divider resistance R16, rectification constituted based on filter capacitor C7, filtering, bleeder circuit, make reverse blocking thyristor
VT1 conducting, and then it is turned off three-phase bidirectional thyristor, and after shutdown before no progress power-off restarting work, three-phase is two-way
Thyristor is all held off always, to can reliably and securely realize protection control to three-phase alternating current load short circuits or overload
Effect.
Claims (2)
1. a kind of 3 phase AC solid relay circuit with short-circuit protection, including light drive electricity every formula three-phase alternating current TRIAC
Road, three-phase shortcircuit and overload telemetry circuit, are characterized in that:
Light includes the two-way crystalline substance of A phase optocoupler IC1, B phase optocoupler IC2, C phase optocoupler IC3, A phase every formula three-phase alternating current TRIAC driving circuit
Brake tube VT2, B phase bidirectional thyristor VT3, C phase bidirectional thyristor VT4, A phase inductance L1, B phase inductance L2, C phase inductance L3, A phase is driven
Dynamic condenser C1, A phase protects capacitor C2, B phase that capacitor C3, B phase is driven to protect capacitor C4, C phase that capacitor C5, C phase is driven to protect capacitor
C6, current-limiting resistance R1, A fail to agree right resistance R3, A phase gate electrode resistance R4, A phase protective resistance R5, B of resistance R2, A phase and fail to agree resistance
Right resistance R7, B phase gate electrode resistance R8, B phase protective resistance R9, C of R6, B phase fails to agree right resistance R11, C the phase gate pole of resistance R10, C phase
Resistance R12, C phase protective resistance R13, A phase load Load-A, B phase load Load-B, C phase load Load-C, it is positive to drive end IN+
End is connect with one end of current-limiting resistance R1, and the other end of current-limiting resistance R1 and anode, the inverse-impedance type of A phase optocoupler IC1 emission side are brilliant
The anode of brake tube VT1 connects, and the cathode of A phase optocoupler IC1 emission side is connect with the anode of B phase optocoupler IC2 emission side, B phase optocoupler
The cathode of IC2 emission side is connect with the anode of C phase optocoupler IC3 emission side, and the cathode and inverse-impedance type of C phase optocoupler IC3 emission side are brilliant
The cathode of brake tube VT1, the connection of the negative driving end end IN-；
One end of A phase optocoupler IC1 outlet side is connect with the one end for failing to agree resistance R2 A, the other end and A of A phase optocoupler IC1 outlet side
The gate pole connection of one end, A phase bidirectional thyristor VT2 of phase gate electrode resistance R4, AC power source A phase hold the one of the end A and A phase inductance L1
End connection, the other end and the 1st anode of A phase bidirectional thyristor VT2, one end of the right resistance R3 of A phase, the A phase of A phase inductance L1 are protected
One end of resistance R5 connects, and the other end and the A of the right resistance R3 of A phase fails to agree the other end of resistance R2, A phase drives one end of capacitor C1
Connection, one end line of A phase load Load-A after the inspection hole of A phase current sensor SC1 with A phase bidirectional thyristor VT2
The 2nd anode, the other end of A phase gate electrode resistance R4, A phase one end for driving the other end of capacitor C1, A phase to protect capacitor C2 connects
It connects, A phase protects the other end of capacitor C2 and the other end of A phase protective resistance R5 to connect；
One end of B phase optocoupler IC2 outlet side is connect with the one end for failing to agree resistance R6 B, the other end and B of B phase optocoupler IC2 outlet side
The gate pole connection of one end, B phase bidirectional thyristor VT2 of phase gate electrode resistance R8, AC power source B phase hold the one end at the end B Yu B inductance L2
Connection, the other end and the 1st anode of B phase bidirectional thyristor VT3, one end of the right resistance R7 of B phase, the B phase of B phase inductance L2 protect electricity
One end connection of R9 is hindered, the other end and the B of the right resistance R7 of B phase fails to agree the other end of resistance R6, B phase drives one end of capacitor C3 to connect
It connects, one end line of B phase load Load-B is after the inspection hole of B phase current sensor SC2 with B phase bidirectional thyristor VT3's
One end that 2nd anode, the other end of B phase gate electrode resistance R8, B phase drive the other end of capacitor C3, B phase to protect capacitor C4 connects, B
Mutually the other end of protection capacitor C4 is connect with the other end of B phase protective resistance R9；
One end of C phase optocoupler IC3 outlet side is connect with the one end for failing to agree resistance R10 C, the other end of C phase optocoupler IC3 outlet side with
The gate pole connection of one end, C phase bidirectional thyristor VT4 of C phase gate electrode resistance R12, AC power source C phase hold C-terminal and C phase inductance L3's
One end connection, 1st anode of the other end of C phase inductance L3 with C phase bidirectional thyristor VT4, one end of the right resistance R11 of C phase, C phase
One end of protective resistance R13 connects, and the other end and the C of the right resistance R11 of C phase fail to agree the other end of resistance R10, C phase drives capacitor
One end of C5 connects, one end line of C phase load Load-C after the inspection hole of C phase current sensor SC3 with the two-way crystalline substance of C phase
The 2nd anode of brake tube VT4, the other end of C phase gate electrode resistance R12, C phase drive the other end of capacitor C5, C phase to protect capacitor C6's
One end connection, C phase protect the other end of capacitor C6 and the other end of C phase protective resistance R13 to connect；
In three-phase three-wire system load: the other end of A phase load Load-A and the other end, the C phase load of B phase load Load-B
The other end of Load-C connects；In three-phase four-wire system load: the other end of A phase load Load-A is with B phase load Load-B's
The other end, the other end of C phase load Load-C, the connection of AC power source zero line side N-terminal；
Three-phase shortcircuit and overload telemetry circuit include inverse-impedance type thyristor VT1, A phase current sensor SC1, B phase current sensor
Diode D6 under diode D3, B phase in diode D4, B phase under diode D1, A phase in SC2, C phase current sensor SC3, A phase,
Diode D2, transfer resistance R14, filter resistance R15, divider resistance R16, filter capacitor C7, A under diode D5, C phase in C phase
The 2nd end output end I2 of phase current sensor SC1 and the 2nd end output end I2, the C phase current sensor of B phase current sensor SC2
The 2nd end output end I2 of SC3 connects, the 1st end output end I1 of A phase current sensor SC1 and anode, the A of diode D1 in A phase
The cathode connection of diode D4, the 1st end output end I1 of B phase current sensor SC2 and anode, the B of diode D3 in B phase under phase
The cathode connection of diode D6, the 1st end output end I1 of C phase current sensor SC3 and anode, the C of diode D5 in C phase under phase
The cathode connection of diode D2 under phase, the cathode of diode D1 and diode D5 in the cathode of diode D3 in B phase, C phase in A phase
Cathode, one end of transfer resistance R14, filter resistance R15 one end connection, the other end and divider resistance of filter resistance R15
The gate pole connection of one end of R16, one end of filter capacitor C7, inverse-impedance type thyristor VT1, the anode and B phase of diode D4 under A phase
The anode of diode D2 under the anode of lower diode D6, C phase, the other end of transfer resistance R14, filter capacitor C7 the other end,
The other end of divider resistance R16, the connection of the negative driving end end IN-.
2. a kind of three-phase alternating current solid-state relay circuit with short-circuit protection according to claim 1, it is characterised in that
Circuit parameter matching relationship is as follows:
If: UgTHFor the gate trigger voltage threshold value of inverse-impedance type thyristor, the tested electric current of A, B, C phase current sensor with it is defeated
Electric current is I respectively out1x、I2x, the electric current ratio of x=A, B, C therein, each phase current sensor are ki=I2x/I1x, enable: I1xm
The tested electric current I allowed for x phase1xMaximum value, and I1Am=I1Bm=I1Cm=I1m, then:
R15> > R14 (1)
R in formula14、R15、R16The respectively resistance value of transfer resistance R14, filter resistance R15, divider resistance R16.
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| CN201811444604.XA CN109510613B (en) | 2018-11-29 | 2018-11-29 | Three-phase alternating-current solid-state relay circuit with short-circuit protection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811444604.XA CN109510613B (en) | 2018-11-29 | 2018-11-29 | Three-phase alternating-current solid-state relay circuit with short-circuit protection |
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| CN109510613B CN109510613B (en) | 2022-11-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113992063A (en) * | 2021-09-30 | 2022-01-28 | 兰州万里航空机电有限责任公司 | Three-phase alternating current motor driving control device for airplane electric roller |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090161278A1 (en) * | 2007-12-19 | 2009-06-25 | Hon Hai Precision Industry Co., Ltd. | Short-circuit protection circuit |
| CN203775096U (en) * | 2014-01-26 | 2014-08-13 | 杭州电子科技大学 | DC motor driving and protecting circuit |
| CN104052350A (en) * | 2014-01-26 | 2014-09-17 | 杭州电子科技大学 | Motor control and multifunctional protection circuit for vibration tests |
-
2018
- 2018-11-29 CN CN201811444604.XA patent/CN109510613B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090161278A1 (en) * | 2007-12-19 | 2009-06-25 | Hon Hai Precision Industry Co., Ltd. | Short-circuit protection circuit |
| CN203775096U (en) * | 2014-01-26 | 2014-08-13 | 杭州电子科技大学 | DC motor driving and protecting circuit |
| CN104052350A (en) * | 2014-01-26 | 2014-09-17 | 杭州电子科技大学 | Motor control and multifunctional protection circuit for vibration tests |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113992063A (en) * | 2021-09-30 | 2022-01-28 | 兰州万里航空机电有限责任公司 | Three-phase alternating current motor driving control device for airplane electric roller |
| CN113992063B (en) * | 2021-09-30 | 2024-02-06 | 兰州万里航空机电有限责任公司 | Three-phase alternating current motor driving control device for aircraft electric roller |
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| CN109510613B (en) | 2022-11-15 |
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