CN107591783A - A kind of control method of three phase mains protection circuit and three phase mains protection circuit - Google Patents
A kind of control method of three phase mains protection circuit and three phase mains protection circuit Download PDFInfo
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- CN107591783A CN107591783A CN201710748214.0A CN201710748214A CN107591783A CN 107591783 A CN107591783 A CN 107591783A CN 201710748214 A CN201710748214 A CN 201710748214A CN 107591783 A CN107591783 A CN 107591783A
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Abstract
The present invention proposes a kind of control method of three phase mains protection circuit and three phase mains protection circuit, and three phase mains protection circuit includes：First thermistor, the first thermistor are connected between phase voltage line and the first rectification circuit；Filter circuit, filter circuit are connected between the first rectification circuit and Switching Power Supply；Control chip, one end of control chip are connected with the first output end of Switching Power Supply, and the control chip other end is connected with zero line protection circuit and the first relay；Wherein, turning circuit is to the electrochemical capacitor charging on filter circuit when the first relay is not closed for the first thermistor, and filter circuit is used to filtering and improving voltage range adaptability, and control chip is used to control the first relay and zero line protection circuit.The present invention easily causes the problem of Switching Power Supply damage when line voltage power supply or overvoltage can be avoided to power.
Description
Technical field
The present invention relates to field of circuit technology, is protected in particular to a kind of three phase mains protection circuit and three phase mains
The control method of protection circuit.
Background technology
In the application of three-phase and four-line power supply, the load device of 220V phase voltages power supply be present, i.e., wherein live wire and
A piece zero line power supply, it is also possible to connecing two live wires, lacking the situation of zero line or misfire line.The three-phase and four-line power supply of correlation technique
In equipment, Switching Power Supply is often by a wherein live wire and a zero line power supply, i.e. 220V power supplies, if access power supply is not
It is right, or installation do not pay attention to, during wrong phase, particularly 220V misconnection into 380V power when, switching power supply parts can damage immediately, from
And equipment does not work.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art or correlation technique.
Therefore, one aspect of the present invention is to propose a kind of three phase mains protection circuit.
Another aspect of the present invention is to propose a kind of control method of three phase mains protection circuit.
In view of this, according to an aspect of the present invention, it is proposed that a kind of three phase mains protection circuit, including：First heat
Quick resistance, the first thermistor are connected between phase voltage line and the first rectification circuit；Filter circuit, filter circuit are connected to
Between one rectification circuit and Switching Power Supply；Control chip, one end of control chip are connected with the first output end of Switching Power Supply,
The control chip other end is connected with zero line protection circuit and the first relay；Wherein, the first thermistor is in the first relay
Turning circuit is fitted to the electrochemical capacitor charging on filter circuit, filter circuit for filtering and improving voltage range when not closed
Ying Xing, control chip are used to control the first relay and zero line protection circuit.
Three phase mains protection circuit provided by the invention, the first thermistor are series at phase voltage line and the first rectification circuit
Between, and it is in parallel with the first relay, it is filtering by the first thermistor turning circuit in the non-adhesive of the first relay
Electrochemical capacitor charging on circuit, Switching Power Supply provide 12V power supplys for late-class circuit, 5V power supplys are provided for control chip, control
Make Switching Power Supply life's work after chip controls the first relay adhesive, wherein filter circuit is connected in parallel on the first rectification circuit with opening
Between powered-down source, it is acted on except filtering, and when also tackling input misconnection line voltage, commutating voltage is too high and causes electric capacity to damage
Bad the problem of.The present invention easily causes the problem of Switching Power Supply damage when line voltage power supply or overvoltage can be avoided to power.Together
When Switching Power Supply itself detect and do not worked then during overvoltage, cut-out 5V, 12V output, protect late-class circuit.
According to the above-mentioned three phase mains protection circuit of the present invention, there can also be following technical characteristic：
In the above-mentioned technical solutions, it is preferable that zero line protection circuit is connected between zero line and switch device circuit, and
It is connected with control chip, zero line protection circuit is used to protect late-class circuit under the control of control chip.
In the technical scheme, zero line protection circuit, the connection of zero line protection circuit are also included in three phase mains protection circuit
It is connected between zero line and switch device circuit, and with control chip, after Switching Power Supply normal work, control chip leads to
The work for the device crossed in control zero line protection circuit, and then protect load and the device of the phase voltage of rear class.
In any of the above-described technical scheme, it is preferable that filter circuit includes the first electrochemical capacitor, the second electrochemical capacitor, the
Three resistance, the 4th resistance；First electrochemical capacitor is connected with the second electrochemical capacitor, 3rd resistor and the 4th resistant series, the first electricity
Solve electric capacity and the second electrochemical capacitor and 3rd resistor and the 4th resistor coupled in parallel.
In the technical scheme, the first electrochemical capacitor and the series connection of the second electrochemical capacitor on the circuit after rectification in parallel, carry again
High withstand voltage ability, while a power resistor in parallel on each electrochemical capacitor, play a part of equilibrium partial pressure.When circuit is by phase
Voltage misconnection is that two live wires are powered, i.e., when line voltage is powered, originally the weak link electrochemical capacitor part of power supply is because taking
The measure of two electrochemical capacitor (pressure voltage that two electric capacity add up necessarily be greater than the magnitude of voltage after line voltage rectification) series connection, solution
The danger that certainly electrochemical capacitor explodes by misconnection line voltage, and the scheme of series capacitance, tackle high-tension feasibility
Say it is most economical.
In any of the above-described technical scheme, it is preferable that zero line protection circuit include the second thermistor, the second relay,
3rd relay；Second thermistor and the second relay are series between zero line and switch device circuit, the 3rd relay with
Second thermistor and the second relay are in parallel；Or second relay and the 3rd relay be series at zero line and switching device electricity
Between road, the second thermistor is in parallel with the 3rd relay.
In the technical scheme, the connected mode in zero line protection circuit has two kinds：(1) second thermistor and second after
Electrical equipment is series between zero line and switch device circuit, and the 3rd relay is in parallel with the second thermistor and the second relay；(2)
Second relay and the 3rd relay are series between zero line and switch device circuit, and the second thermistor and the 3rd relay are simultaneously
Connection；First thermistor and the second thermistor are thermistor.Circuit is led after control chip controls the second relay adhesive
It is logical, be that electrochemical capacitor in switch device circuit charges by the second thermistor current limliting, then by control chip control the 3rd after
Electrical equipment adhesive, now the situation of (1) is that electric current is supplied to switch device circuit by the 3rd relay, and the situation of (2) is electric current
Switch device circuit, and then protection switch circuit are supplied to by the second relay and the 3rd relay.It should be noted that
(1) situation about connecting is not present with the 3rd relay compared to the second relay for (2), so the big I of two relays
With loads different and then that control is different.
In any of the above-described technical scheme, it is preferable that the second relay and the 3rd relay are connected with control chip respectively
Connect.
In the technical scheme, the second relay and the 3rd relay are connected with control chip respectively, and then pass through control
The adhesive of two relays of chip controls processed, realize by the phase of leading protection circuit protection switch device circuitry and rear class electricity
The load of pressure and device.
In any of the above-described technical scheme, it is preferable that the first relay, the second relay, the control terminal of the 3rd relay
Connect 12V power supplys.
In the technical scheme, it is the first relay, the second relay, the power supply of the 3rd relay by 12V power supplys, ensures
The normal work of relay.
In any of the above-described technical scheme, it is preferable that switch device circuit includes the second rectification circuit, the 3rd electrolysis electricity
Appearance, the 4th electrochemical capacitor, thin-film capacitor, piezo-resistance, power resistor；Second rectification circuit, the 3rd electrochemical capacitor, the 4th electrolysis
Electric capacity, thin-film capacitor, piezo-resistance, power resistor are parallel with one another.
In the technical scheme, switch device circuit includes the second rectification circuit, the 3rd electrochemical capacitor, the 4th electrolysis electricity
Appearance, thin-film capacitor, piezo-resistance, power resistor, it is electrolysed after the second relay adhesive by the second thermistor for the 3rd
Electric capacity, the charging of the 4th electrochemical capacitor, switch device circuit connect required load afterwards, and wherein thin-film capacitor is used to absorb wave
Gush, piezo-resistance is used for antisurge, and power resistor is used for the discharge time for reducing discharge capacity.
In any of the above-described technical scheme, it is preferable that the first rectification circuit is connected with zero line, the second rectification circuit and phase
Pressure-wire is connected；Protective tube is in series between second rectification circuit and phase voltage line.
In the technical scheme, protective tube is in series between the second rectification circuit and phase voltage line, protects the second rectified current
Road safe operation.
According to another aspect of the present invention, it is proposed that a kind of control method of three phase mains protection circuit, for above-mentioned
The three phase mains protection circuit of any one, including：Whether the voltage for detecting three phase mains is normal；When the voltage of three phase mains is normal
When, control adhesive after the first relay delay preset time；After the first relay adhesive is controlled, the phase sequence of three phase mains is judged
It is whether correct；When the phase sequence of three phase mains is correct, the second relay adhesive is controlled to be charged for switch device circuit；Judge switch
Device circuitry whether charging complete；When switch device circuit charging complete, the 3rd relay adhesive of control makes late-class circuit just
Often work.
The control method of three phase mains protection circuit provided by the invention, equipment are powered, and are normally voltage in supply voltage
In the case of phase voltage, control the first relay delay adhesive, prevent that voltage is abnormal and causes the damage of relay, enter one
Step ground judges whether the phase sequence of three phase mains is correct, and the input of three phase mains is illustrated when correct and does not have wrong, controls second
Relay adhesive turns on zero line, is charged for switch device circuit, after switch device circuit charging complete, controls the 3rd relay
Device adhesive makes late-class circuit normal work, and device is caused so as to avoid phase voltage from being connected into the scarce zero line of power supply of line voltage or access
The situation of part damage, can effectively protect load and component, and the security of circuit is good, convenient and practical.
According to the control method of the above-mentioned three phase mains protection circuit of the present invention, there can also be following technical characteristic：
In the above-mentioned technical solutions, it is preferable that also include：When the voltage of three phase mains is abnormal, do not control first after
Electrical equipment adhesive, and whether the voltage for continuing to detect three phase mains is normal；When the phase sequence of three phase mains is incorrect, second is not controlled
Relay adhesive, and continue to judge switch device circuit whether charging complete；When switch device circuit charging unfinished, do not control
Make the 3rd relay adhesive, and continue to judge switch device circuit whether charging complete.
In the technical scheme, when the voltage of three phase mains is abnormal, i.e., voltage is line voltage, or work as three phase mains
Phase sequence it is incorrect when, then show the input wrong of three phase mains, then control the first relay to disconnect, or control second
Relay disconnects, and avoids load and component from being damaged.When switch device circuit charging unfinished, the 3rd relay is not controlled to inhale
Close, to ensure charging normal for switch device circuit.
In any of the above-described technical scheme, it is preferable that also include：Filled in preset time for filter circuit and Switching Power Supply
Electricity.
In the technical scheme, charged in preset time for filter circuit and Switching Power Supply, and then enable Switching Power Supply
It is enough to provide 5V power supplys to control chip, make control chip normal work.
The additional aspect and advantage of the present invention will become obvious in following description section, or the practice by the present invention
Recognize.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 a show the structural representation of the three phase mains protection circuit of one embodiment of the present of invention；
Fig. 1 b show the structural representation of the three phase mains protection circuit of one embodiment of the present of invention；
Fig. 2 shows the schematic flow sheet of the control method of the three phase mains protection circuit of one embodiment of the present of invention.
Wherein, the corresponding relation in Fig. 1 a and Fig. 1 b between reference and component names is：
102 first thermistors, 104 first rectification circuits, 106 filter circuits, 108 Switching Power Supplies, 110 control chips,
112 zero line protection circuits, 114 first relays, 116 switch device circuits, 1,202 second thermistors, 1,204 second relays
Device, 1206 the 3rd relays, 1208 protective tubes, 1,602 second rectification circuits, 1604 the 3rd electrochemical capacitors, 1606 the 4th electrolysis electricity
Hold, 1608 thin-film capacitors, 1610 piezo-resistances, 1612 power resistors.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting, the implementation of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be different from other modes described here using other to implement, therefore, protection scope of the present invention is not limited to following public affairs
The limitation for the specific embodiment opened.
The embodiment of first aspect present invention, proposes a kind of three phase mains protection circuit, and Fig. 1 a and Fig. 1 b show this hair
The structural representation of bright three phase mains protection circuit.Wherein, the three phase mains protection circuit includes：
First thermistor 102, the first thermistor 102 are connected between phase voltage line C and the first rectification circuit 104；
Filter circuit 106, filter circuit 106 are connected between the first rectification circuit 104 and Switching Power Supply 108；
Control chip 110, one end of control chip 110 are connected with the first output end of Switching Power Supply 108, control chip
110 other ends are connected with the relay 114 of zero line protection circuit 112 and first；Wherein, the first thermistor 102 first after
Turning circuit is used to filter to the electrochemical capacitor charging on the circuit of filter circuit 106, filter circuit 106 when electrical equipment 114 is not closed
And voltage range adaptability is improved, control chip 110 is used to control the first relay 114 and zero line protection circuit 112.
Three phase mains protection circuit provided by the invention, the first thermistor string 102 are coupled to phase voltage line C and the first rectification
Between circuit 104, and it is in parallel with the first relay 114, in the first 114 non-adhesive of relay, pass through the first thermistor
102 turning circuits are the electrochemical capacitor charging on filter circuit 106, and Switching Power Supply 108 provides 12V power supplys for late-class circuit, is
Control chip 110 provides 5V power supplys, and control chip 110 makes the regular employee of Switching Power Supply 108 after controlling the adhesive of the first relay 114
Make, wherein filter circuit 106 is connected in parallel between the first rectification circuit 104 and Switching Power Supply 108, and it is acted on except filtering, is also had
When tackling input misconnection line voltage, commutating voltage is too high and the problem of cause capacitance damage.The present invention can avoid line voltage
Power supply or overvoltage easily cause the problem of Switching Power Supply 108 is damaged when powering.Simultaneous Switching power supply 108 itself detected electricity
Do not worked then during pressure, cut-out 5V, 12V output, protect late-class circuit.
In one embodiment of the invention, it is preferable that zero line protection circuit 112 is connected to zero line N and switching device electricity
Between road 116, and it is connected with control chip 110, zero line protection circuit 112 is used to protect under the control of control chip 110
Protect late-class circuit.
In this embodiment, zero line protection circuit 112, zero line protection circuit 112 are also included in three phase mains protection circuit
It is connected between zero line N and switch device circuit 116, and is connected with control chip 110, in 108 normal work of Switching Power Supply
After work, control chip 110 protects the phase voltage of rear class by controlling the work of the device in zero line protection circuit 112
Load and device.
In one embodiment of the invention, it is preferable that filter circuit 106 includes the first electrochemical capacitor, the second electrolysis electricity
Appearance, 3rd resistor, the 4th resistance；First electrochemical capacitor is connected with the second electrochemical capacitor, 3rd resistor and the 4th resistant series, the
One electrochemical capacitor and the second electrochemical capacitor and 3rd resistor and the 4th resistor coupled in parallel.
In this embodiment, the first electrochemical capacitor and the series connection of the second electrochemical capacitor improve again on the circuit after rectification in parallel
Voltage endurance capability, while a power resistor in parallel on each electrochemical capacitor, play a part of equilibrium partial pressure.When circuit is by mutually electricity
It is that two live wires are powered to press misconnection, i.e., when line voltage is powered, originally the weak link electrochemical capacitor part of power supply is because taking two
The measure of individual electrochemical capacitor (pressure voltage that two electric capacity add up necessarily be greater than the magnitude of voltage after line voltage rectification) series connection, is solved
The danger that electrochemical capacitor explodes by misconnection line voltage, and the scheme of series capacitance, are tackled for high-tension feasibility
It is most economical.
In one embodiment of the invention, it is preferable that zero line protection circuit 12 includes the second thermistor 1202, second
Relay 1204, the 3rd relay 1206；As shown in Figure 1a, the second thermistor 1202 and the second relay 1204 are series at zero
Between line N and switch device circuit 116, the 3rd relay 1206 and the second thermistor 1202 and the second relay 1204 are simultaneously
Connection；Or as shown in Figure 1 b, the second relay 1204 and the 3rd relay 1206 are series at zero line N and switch device circuit 116
Between, the second thermistor 1202 is in parallel with the 3rd relay 1206.
In this embodiment, the connected mode in zero line protection circuit 112 has two kinds：(1) second thermistor 1202 and
Second relay 1204 is series between zero line N and switch device circuit 116, the 3rd relay 1206 and the second thermistor
1202 and the second relay 1204 it is in parallel；(2) second relays 1204 and the 3rd relay 1206 are series at zero line N and derailing switch
Between part circuit 116, the second thermistor 1202 is in parallel with the 3rd relay 1206；First thermistor 102 and the second temperature-sensitive
Resistance 1202 is thermistor.The circuit turn-on after control chip 110 controls the adhesive of the second relay 1204, passes through the second temperature-sensitive
The current limliting of resistance 1202 is the electrochemical capacitor charging in switch device circuit 116, then controls the 3rd relay by control chip 110
1206 adhesives, now the situation of (1) is that electric current is supplied to switch device circuit 116 by the 3rd relay 1206, the situation of (2)
Switch device circuit 116, and then protection switch electricity are supplied to by the second relay 1204 and the 3rd relay 1206 for electric current
Road.It should be noted that the feelings connected are not present with the 3rd relay 1206 compared to the second relay 1204 for (2) in (1)
Condition, so the size of two relays can be different and then controls different loads.
In one embodiment of the invention, it is preferable that the second relay 1204 and the 3rd relay 1206 respectively with control
Coremaking piece 110 is connected.
In this embodiment, the second relay 1204 and the 3rd relay 1206 are connected with control chip 110 respectively, enter
And the adhesive of two relays is controlled by control chip 110, realization passes through leading protection circuit protection switch device circuitry 116
And load and the device of the phase voltage of rear class.
In one embodiment of the invention, it is preferable that the first relay 114, the second relay 1204, the 3rd relay
1206 control terminal connects 12V power supplys.
In this embodiment, it is the first relay 114, the second relay 1204, the 3rd relay 1206 by 12V power supplys
Power supply, ensure the normal work of relay.
In one embodiment of the invention, it is preferable that switch device circuit 116 includes the second rectification circuit 1602, the
Three electrochemical capacitors 1604, the 4th electrochemical capacitor 1606, thin-film capacitor 1608, piezo-resistance 1610, power resistor 1612；Second is whole
Current circuit 1602, the 3rd electrochemical capacitor 1604, the 4th electrochemical capacitor 1606, thin-film capacitor 1608, piezo-resistance 1610, power electricity
It is parallel with one another to hinder 1612.
In this embodiment, switch device circuit includes the second rectification circuit 1602, the electricity of the 3rd electrochemical capacitor the 1604, the 4th
Electric capacity 1606, thin-film capacitor 1608, piezo-resistance 1610, power resistor 1612 are solved, is passed through after the adhesive of the second relay 1204
Second thermistor 1202 is the 3rd electrochemical capacitor 1604, the 4th electrochemical capacitor 1606 charges, after switch device circuit 116
Connection load, wherein thin-film capacitor 1608 are used to absorb surge, and piezo-resistance 1610 is used for antisurge, and power resistor 1612 is used for
Reduce the discharge time of discharge capacity.
In one embodiment of the invention, it is preferable that the first rectification circuit 104 is connected with zero line N, the second rectified current
Road 1608 is connected with phase voltage line C；Protective tube 1208 is in series between second rectification circuit 1608 and phase voltage line C.
In this embodiment, protective tube 1208 is in series between the second rectification circuit and phase voltage line C, protects the second rectification
The safe operation of circuit 1602.
The embodiment of second aspect of the present invention, a kind of control method of three phase mains protection circuit is proposed, for above-mentioned
The three phase mains protection circuit of one, Fig. 2 show the controlling party of the three phase mains protection circuit of one embodiment of the present of invention
The schematic flow sheet of method.Wherein, this method includes：
Step 202, whether the voltage for detecting three phase mains is normal；
Step 204, when the voltage of three phase mains is normal, adhesive after control the first relay delay preset time；
Step 206, when the voltage of three phase mains is abnormal, the first relay adhesive is not controlled, and continues to detect three-phase
Whether the voltage of power supply is normal；
Step 208, after the first relay adhesive is controlled, judge whether the phase sequence of three phase mains is correct；
Step 210, when the phase sequence of three phase mains is correct, the second relay adhesive is controlled to be charged for switch device circuit；
Step 212, when the phase sequence of three phase mains is incorrect, the second relay adhesive is not controlled, and continues to judge switch
Device circuitry whether charging complete；
Step 214, judge switch device circuit whether charging complete；
Step 216, when switch device circuit charging complete, the 3rd relay adhesive of control makes the normal work of late-class circuit
Make；
Step 218, when switch device circuit charging unfinished, the 3rd relay adhesive is not controlled, and is continued judgement and opened
Close device circuitry whether charging complete.
The control method of three phase mains protection circuit provided by the invention, equipment are powered, and are normally voltage in supply voltage
In the case of phase voltage, control the first relay delay adhesive, prevent that voltage is abnormal and causes the damage of relay, enter one
Step ground judges whether the phase sequence of three phase mains is correct, and the input of three phase mains is illustrated when correct and does not have wrong, controls second
Relay adhesive turns on zero line, is charged for switch device circuit, after switch device circuit charging complete, controls the 3rd relay
Device adhesive makes late-class circuit normal work, and device is caused so as to avoid phase voltage from being connected into the scarce zero line of power supply of line voltage or access
The situation of part damage, can effectively protect load and component, and the security of circuit is good, convenient and practical.Work as three phase mains
Voltage it is abnormal, i.e., when voltage is line voltage, or when the phase sequence of three phase mains is incorrect, then show the defeated of three phase mains
Enter to terminate it is wrong, then control the first relay disconnect, or control the second relay disconnect, avoid load and component be damaged.
When switch device circuit charging unfinished, the 3rd relay adhesive is not controlled, to ensure charging normal for switch device circuit.
In one embodiment of the invention, it is preferable that also include：It is filter circuit and Switching Power Supply in preset time
Charging.
In this embodiment, charged in preset time for filter circuit and Switching Power Supply, and then enable Switching Power Supply
5V power supplys are provided to control chip, make control chip normal work.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean to combine at least one reality that specific features, structure, material or the feature that the embodiment or example describe are contained in the present invention
Apply in example or example.In this manual, identical embodiment or reality are not necessarily referring to the schematic representation of above-mentioned term
Example.Moreover, description specific features, structure, material or feature can in any one or more embodiments or example with
Suitable mode combines.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (11)
- A kind of 1. three phase mains protection circuit, it is characterised in that including：First thermistor, first thermistor are connected between phase voltage line and the first rectification circuit；Filter circuit, the filter circuit are connected between first rectification circuit and Switching Power Supply；Control chip, one end of the control chip are connected with the first output end of the Switching Power Supply, the control chip The other end is connected with zero line protection circuit and the first relay；Wherein, first thermistor electricity that turning circuit is given on the filter circuit when first relay is not closed Electric capacity charging is solved, the filter circuit is used to filtering and improving voltage range adaptability, and the control chip is used to control institute State the first relay and the zero line protection circuit.
- 2. three phase mains protection circuit according to claim 1, it is characterised in thatThe zero line protection circuit is connected between the zero line and switch device circuit, and is connected with the control chip Connect, the zero line protection circuit is used to protect late-class circuit under the control of the control chip.
- 3. three phase mains protection circuit according to claim 1, it is characterised in that the filter circuit includes the first electrolysis Electric capacity, the second electrochemical capacitor, 3rd resistor, the 4th resistance；First electrochemical capacitor is connected with second electrochemical capacitor, the 3rd resistor and the 4th resistant series, institute State the first electrochemical capacitor and second electrochemical capacitor and the 3rd resistor and the 4th resistor coupled in parallel.
- 4. three phase mains protection circuit according to claim 1, it is characterised in that the zero line protection circuit includes second Thermistor, the second relay, the 3rd relay；Second thermistor and second relay are series between the zero line and the switch device circuit, described 3rd relay is in parallel with second thermistor and second relay；Or second relay and the described 3rd Relay is series between the zero line and the switch device circuit, and second thermistor and the 3rd relay are simultaneously Connection.
- 5. three phase mains protection circuit according to claim 4, it is characterised in that second relay and the described 3rd Relay is connected with the control chip respectively.
- 6. three phase mains protection circuit according to claim 5, it is characterised in that first relay, described second Relay, the control terminal of the 3rd relay connect 12V power supplys.
- 7. three phase mains protection circuit according to any one of claim 1 to 6, it is characterised in that the switching device Circuit includes the second rectification circuit, the 3rd electrochemical capacitor, the 4th electrochemical capacitor, thin-film capacitor, piezo-resistance, power resistor；It is second rectification circuit, the 3rd electrochemical capacitor, the 4th electrochemical capacitor, the thin-film capacitor, described pressure-sensitive Resistance, the power resistor are parallel with one another.
- 8. three phase mains protection circuit according to claim 7, it is characterised in that first rectification circuit and described zero Line is connected, and second rectification circuit is connected with the phase voltage line；Protective tube is in series between second rectification circuit and the phase voltage line.
- A kind of 9. control method of three phase mains protection circuit, for the three phase mains as any one of claim 1 to 8 Protection circuit, it is characterised in that including：Whether the voltage for detecting three phase mains is normal；When the voltage of the three phase mains is normal, adhesive after control the first relay delay preset time；After the first relay adhesive is controlled, judge whether the phase sequence of the three phase mains is correct；When the phase sequence of the three phase mains is correct, the second relay adhesive is controlled to be charged for switch device circuit；Judge the switch device circuit whether charging complete；When the switch device circuit charging complete, the 3rd relay adhesive of control makes late-class circuit normal work.
- 10. the control method of three phase mains protection circuit according to claim 9, it is characterised in that also include：When the voltage of the three phase mains is abnormal, the first relay adhesive is not controlled, and continues to detect three phase mains Voltage it is whether normal；When the phase sequence of the three phase mains is incorrect, the second relay adhesive is not controlled, and continues to judge the switching device Circuit whether charging complete；When the switch device circuit charging unfinished, the 3rd relay adhesive is not controlled, and continues to judge the derailing switch Part circuit whether charging complete.
- 11. the control method of three phase mains protection circuit according to claim 9, it is characterised in that also include：Charged in the preset time for filter circuit and Switching Power Supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710748214.0A CN107591783B (en) | 2017-08-28 | 2017-08-28 | Three-phase power supply protection circuit and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710748214.0A CN107591783B (en) | 2017-08-28 | 2017-08-28 | Three-phase power supply protection circuit and control method thereof |
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| CN107591783A true CN107591783A (en) | 2018-01-16 |
| CN107591783B CN107591783B (en) | 2019-12-27 |
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| CN201710748214.0A Active CN107591783B (en) | 2017-08-28 | 2017-08-28 | Three-phase power supply protection circuit and control method thereof |
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| CN109347146A (en) * | 2018-11-22 | 2019-02-15 | 绵阳市维博电子有限责任公司 | A kind of motor driven systems energy feedback main circuit |
| CN113363932A (en) * | 2021-06-07 | 2021-09-07 | 山东建筑大学 | Series short-circuit fault detection and protection circuit based on electrolytic capacitor |
| CN113422352A (en) * | 2021-06-07 | 2021-09-21 | 山东建筑大学 | Strong-current switch circuit capable of automatically detecting short-circuit fault |
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| CN108599543A (en) * | 2018-04-18 | 2018-09-28 | 广东希塔变频技术有限公司 | Power source charges control circuit and power source charges control method |
| CN108599543B (en) * | 2018-04-18 | 2021-05-18 | 广东希塔变频技术有限公司 | Power supply charging control circuit and power supply charging control method |
| CN109347146A (en) * | 2018-11-22 | 2019-02-15 | 绵阳市维博电子有限责任公司 | A kind of motor driven systems energy feedback main circuit |
| CN113363932A (en) * | 2021-06-07 | 2021-09-07 | 山东建筑大学 | Series short-circuit fault detection and protection circuit based on electrolytic capacitor |
| CN113422352A (en) * | 2021-06-07 | 2021-09-21 | 山东建筑大学 | Strong-current switch circuit capable of automatically detecting short-circuit fault |
| CN113363932B (en) * | 2021-06-07 | 2022-06-21 | 山东建筑大学 | Series short-circuit fault detection and protection circuit based on electrolytic capacitor |
| CN113422352B (en) * | 2021-06-07 | 2022-06-21 | 山东建筑大学 | Strong-current switch circuit capable of automatically detecting short-circuit fault |
| CN115912899A (en) * | 2023-02-20 | 2023-04-04 | 广东东菱电源科技有限公司 | Capacitor series voltage division circuit |
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