CN107093924B - Dual-power delay control dual-interlocking alternating-current stabilized voltage supply box with anti-interference function - Google Patents
Dual-power delay control dual-interlocking alternating-current stabilized voltage supply box with anti-interference function Download PDFInfo
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- CN107093924B CN107093924B CN201610088641.6A CN201610088641A CN107093924B CN 107093924 B CN107093924 B CN 107093924B CN 201610088641 A CN201610088641 A CN 201610088641A CN 107093924 B CN107093924 B CN 107093924B
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- power supply
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- contactor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/008—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result preventing unsafe switching operations in substations (Schaltfehlerschutz)
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
Abstract
The invention discloses a dual-power delay control dual-interlocking alternating current stabilized voltage power supply box with an anti-interference function, which solves the technical problems of the existing dual-power supply that two power supplies are simultaneously connected and the voltage superposition effect caused by the simultaneous switching or too fast switching of the two power supplies is avoided. The dual power supply switching and dual interlocking of the invention also ensures that the electric equipment is prevented from the occurrence of the accident that two power supplies supply simultaneously, and in order to increase the safety and reliability of the dual power supplies, the dual power supply switching delay circuits are respectively designed on the two control signal loops, one of the two power supplies which is originally operated is firstly powered off in the switching control of the control signals 00, 01 and 10, and the other power supply which is required to be switched is powered on after being delayed for 3 seconds, namely the delay time is adjustable, thereby avoiding the voltage superposition effect caused by the simultaneous switching or too fast switching of the two power supplies and protecting the electric equipment from damage.
Description
Technical Field
The invention relates to an alternating current stabilized voltage supply box, in particular to an alternating current stabilized voltage supply box with electric interlocking and time delay functions, which is powered by double power supplies used in underground coal mines.
Background
With the development of scientific technology in China, a computer control system, a safety monitoring system, a communication system and a large number of various sensors are adopted in underground coal mines, and the power supply of the systems and the devices is provided by an underground 127V lighting signal comprehensive protection device. Due to frequent starting of high-power equipment in the coal mine and attenuation of power grid transmission, the voltage of the power grid in the coal mine and instability of the power grid are caused. Particularly, the underground high-power frequency conversion equipment is widely used, so that various phenomena such as surge, peak, sinking and the like in a power grid are more serious, computer data loss or chip damage is often caused, and the normal and safe production of a coal mine is seriously influenced. In the prior art, the underground electric equipment also has the phenomenon that the two power supplies are powered by double power supplies and are electrically interlocked to prevent the two power supplies from simultaneously supplying power, when the power supply for supplying power to the electric equipment fails, the power supply is immediately switched to the other power supply, and the power supply is an alternating current power supply, so that the current is large, the voltage is high, the switching speed of the power supply is too fast, the instantaneous high voltage is formed due to the inductance effect, the superposition effect is generated by superposition with the cut-in voltage, the electric equipment is impacted, and the electric equipment is damaged.
Disclosure of Invention
The invention provides a double-power delay control double-interlocking alternating current stabilized voltage power supply box with an anti-interference function, which not only solves the problem of the accident that two power supplies of the existing double-circuit power supply are simultaneously connected, but also avoids the technical problem of voltage superposition effect caused by simultaneous switching or too fast switching of the two power supplies.
The invention solves the technical problems by the following technical proposal: a dual-power delay control dual-interlocking alternating current stabilized voltage supply box with an anti-interference function comprises a main power supply step-down transformer, a standby power supply step-down transformer, a main power supply contactor and a standby power supply contactor, wherein one end of a 127V output winding of the main power supply step-down transformer is respectively connected with one end of a contact control coil of the main power supply contactor and the input end of a first normally open contact of the main power supply contactor, the other end of the contact control coil of the main power supply contactor is connected with a common contact of a third relay, the other end of the 127V output winding of the main power supply step-down transformer is respectively connected with the normally open contact of a second relay and the input end of a second normally open contact of the main power supply contactor, a normally closed contact of the third relay is connected with the common contact of the second relay, the input end of the normally-closed contact of the main power contactor is connected with the output end of the second normally-open contact of the standby power contactor, the output end of the normally-closed contact of the main power contactor is respectively connected with the output end of the second normally-open contact of the main power contactor and one end of the primary side winding of the voltage-stabilizing power transformer, the output end of the normally-closed contact of the standby power contactor is respectively connected with the output end of the first normally-open contact of the standby power contactor and the other end of the primary side winding of the voltage-stabilizing power transformer, the output end of the first normally-open contact of the main power contactor is connected with the input end of the normally-closed contact of the standby power contactor, one end of the 127V output winding of the standby power step-down transformer is connected with one end of the contact control coil of the standby power contactor and the input end of the first normally-open contact of the standby power contactor, the other end of the contact control coil of the standby power contactor is connected with the common contact of the first relay, the other end of the 127V output winding of the standby power step-down transformer is respectively connected with the normally open contact of the fourth relay and the input end of the second normally open contact of the standby power contactor, the normally closed contact of the first relay is connected with the common contact of the fourth relay, one end of the secondary side output winding of the voltage-stabilizing power transformer is connected with one end of the power output end, the other end of the secondary side output winding of the voltage-stabilizing power transformer is connected with one end of the resonant winding of the voltage-stabilizing power transformer, the two ends of the resonant winding of the voltage-stabilizing power transformer are connected with a series resonant capacitor and a resonant inductor, the middle tap of the resonant winding of the voltage-stabilizing power transformer is connected with the other end of the power output end, the twenty-four volt control output end of the main power supply step-down transformer is connected with the input end of the twenty-four volt rectification power supply of the main power supply loop, the twenty-four volt control output end of the standby power supply step-down transformer is connected with the input end of the twenty-four volt rectification power supply of the standby power supply loop, the output end of the twenty-four volt rectification power supply of the main power supply loop is respectively connected with the output end of the twenty-four volt rectification power supply of the standby power supply loop and the input end of the direct-current twelve-volt voltage stabilizing unit, the output end of the direct-current twelve-voltage stabilizing unit is respectively connected with one end of the control coil of the third relay, one end of the control coil of the fourth relay, one end of the control coil of the first relay and one end of the control coil of the second relay, the other end of the control coil of the third relay is respectively connected with the other end of the control coil of the fourth relay and the emitter of the second Darlington triode, the collector of the second Darlington triode is grounded, the base of the second Darlington triode is connected with one end of a current limiting resistor, the other end of the current limiting resistor is connected with the output end of a comparator of a standby power supply loop, the other end of a control coil of the first relay is connected with the other end of the control coil of the second relay and the emitter of the first Darlington triode respectively, the collector electrode of the first Darlington triode is connected with the ground, the base of the first Darlington triode is connected with one end of the current limiting resistor, and the other end of the current limiting resistor is connected with the output end of the comparator of the main power supply loop. The positive electrode of an electrolytic capacitor in the main circuit twenty-four volt rectifier power supply is connected with the negative electrode of a standby circuit isolation diode, a standby circuit first voltage dividing resistor and a standby circuit second voltage dividing resistor are connected in series between the output end of a direct current twelve volt voltage stabilizing unit and a grounding point, the connection position of the standby circuit first voltage dividing resistor and the standby circuit second voltage dividing resistor is connected with the input positive end of a standby circuit comparator, a standby circuit delay resistor and a standby circuit delay capacitor are connected in series between the output end of the direct current twelve volt voltage stabilizing unit and the grounding point, the connection position of the standby circuit delay resistor and the positive electrode of the standby circuit delay capacitor is connected with the positive electrode of the standby circuit isolation diode and the input negative electrode of the standby circuit comparator respectively, the base stage of an inverting circuit is connected with one end of a current limiting resistor, the other end of the current limiting resistor is connected with the positive electrode of the electrolytic capacitor in the main circuit in series, the one end of the inverting circuit emitter is connected with the output end of the direct current twelve volt voltage stabilizing unit respectively, one end of the current limiting resistor is connected with one end of the inverting circuit delay resistor and the negative electrode of the main circuit isolation diode, the other end of the inverting circuit delay resistor is connected with the positive electrode of the main circuit delay resistor in series with the first voltage dividing resistor and the other end of the main circuit delay resistor, the inverting circuit delay resistor is connected with the first voltage dividing resistor is connected with the positive electrode of the main circuit, the inverting circuit is connected with the other end of the inverting circuit delay resistor is connected with the inverting circuit.
The general inventive idea of the invention is to hardware the software function of the computer, thereby greatly improving the reliability of the system. The dual power supply switching and dual interlocking of the invention also ensures that the electric equipment is prevented from the accident that two paths of power supplies supply simultaneously, in order to increase the safety and reliability of the dual power supplies, the dual power supply switching delay circuits are respectively designed on the two paths of control signal loops, one path of the original work in the two paths of power supplies is firstly powered off in the switching control of the control signals 00, 01 and 10, the other path of the original work in the two paths of power supplies is required to be powered on after being delayed for 3 seconds, namely the switching time sequence of the main power supply work is 10 (main power supply work) →00 (keep 3 seconds after switching 00) →01 (switch to standby power supply work), the switching time sequence of the standby power supply work is 01 (keep 3 seconds after switching 00) →10 (switch to main power supply work), and the delay time is adjustable, thereby avoiding the voltage superposition caused by the too fast switching of the two paths of power supplies (due to inductance effect) and protecting the electric equipment from damage.
The invention adopts double interlocking and time delay of double power contactor contact interlocking and double power coil interlocking, avoids the impact of instantaneous high voltage formed by excessively high power switching speed (due to inductance effect) and cut-in voltage on electric equipment, causes the damage of the electric equipment, and ensures the safe and reliable operation of the power box.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures: a dual-power delay control dual-interlocking alternating current stabilized voltage supply box with an anti-interference function comprises a main power supply step-down transformer 1, a standby power supply step-down transformer 2, a main power supply contactor 3 and a standby power supply contactor 4, wherein one end of a 127V output winding of the main power supply step-down transformer 1 is respectively connected with one end of a contact control coil of the main power supply contactor 3 and the input end of a first normally open contact of the main power supply contactor 3, the other end of the contact control coil of the main power supply contactor 3 is connected with a common contact of a third relay 15, the other end of the 127V output winding of the main power supply step-down transformer 1 is respectively connected with a normally open contact of a second relay 14 and the input end of a second normally open contact of the main power supply contactor 3, a normally closed contact of the third relay 15 is connected with the common contact of the second relay 14, the input end of the normally closed contact of the main power contactor 3 is connected with the output end of the second normally open contact of the standby power contactor 4, the output end of the normally closed contact of the main power contactor 3 is respectively connected with the output end of the second normally open contact of the main power contactor 3 and one end of the primary side winding 5 of the voltage stabilizing power transformer, the output end of the normally closed contact of the standby power contactor 4 is respectively connected with the output end of the first normally open contact of the standby power contactor 4 and the other end of the primary side winding 5 of the voltage stabilizing power transformer, the output end of the first normally open contact of the main power contactor 3 is connected with the input end of the normally closed contact of the standby power contactor 4, one end of the 127V output winding of the standby power step-down transformer 2 is connected with one end of the contact control coil of the standby power contactor 4 and the input end of the first normally open contact of the standby power contactor 4, the other end of the contact control coil of the standby power contactor 4 is connected with the common contact of the first relay 13, the other end of the 127V output winding of the standby power step-down transformer 2 is respectively connected with the normally open contact of the fourth relay 16 and the input end of the second normally open contact of the standby power contactor 4, the normally closed contact of the first relay 13 is connected with the common contact of the fourth relay 16, one end of the secondary output winding 6 of the voltage-stabilized power transformer is connected with one end of the power output end 10, the other end of the secondary output winding 6 of the voltage-stabilized power transformer is connected with one end of the resonant winding 7 of the voltage-stabilized power transformer, the two ends of the resonant winding 7 of the voltage-stabilized power transformer are connected with a series resonant capacitor 8 and a resonant inductor 9, the middle tap of the resonant winding 7 of the voltage-stabilized power transformer is connected with the other end of the power output end 10, the twenty-four volt control output end of the main power supply step-down transformer 1 is connected with the input end of the twenty-four volt rectification power supply 12 of the main power supply loop, the twenty-four volt control output end of the standby power supply step-down transformer 2 is connected with the input end of the twenty-four volt rectification power supply 11 of the standby power supply loop, the output end of the twenty-four volt rectification power supply 12 of the main power supply loop is respectively connected with the output end of the twenty-four volt rectification power supply 11 of the standby power supply loop and the input end of the direct-current twelve-volt voltage stabilizing unit 32, the output end of the direct-current twelve-volt voltage stabilizing unit 32 is respectively connected with one end of the control coil of the third relay 15, one end of the control coil of the fourth relay 16, one end of the control coil of the first relay 13 and one end of the control coil of the second relay 14, the other end of the control coil of the third relay 15 is respectively connected with the other end of the control coil of the fourth relay 16 and the emitter of the second darlington triode 18, the collector of the second darlington triode 18 is grounded, the base of the second darlington triode 18 is connected with one end of the second current limiting resistor 34, the other end of the second current limiting resistor 34 is connected with the output end of the comparator 25 of the standby power supply loop, the other end of the control coil of the first relay 13 is respectively connected with the other end of the control coil of the second relay 14 and the emitter of the first darlington triode 17, the collector of the first darlington triode 17 is connected with the ground, the base of the first darlington triode 17 is connected with one end of the first current limiting resistor 33, and the other end of the first current limiting resistor 33 is connected with the output end of the comparator 31 of the main power supply loop.
The positive electrode of the electrolytic capacitor in the main circuit twenty-four voltage rectification power supply 12 is connected with the negative electrode of the standby circuit isolation diode 20, a standby circuit first voltage dividing resistor 23 and a standby circuit second voltage dividing resistor 24 are connected in series between the output end of the direct current twelve voltage stabilizing unit 32 and the grounding point, the connection part of the standby circuit first voltage dividing resistor 23 and the standby circuit second voltage dividing resistor 24 is connected with the positive electrode of the standby circuit comparator 25, a standby circuit delay resistor 22 and a standby circuit delay capacitor 21 are connected in series between the output end of the direct current twelve voltage stabilizing unit 32 and the grounding point, the connection part of the standby circuit delay resistor 22 and the positive electrode of the standby circuit delay capacitor 21 is respectively connected with the positive electrode of the standby circuit isolation diode 20 and the negative electrode of the standby circuit comparator 25, the base stage of the inverting circuit 19 is connected with one end of the fourth current limiting resistor 36, the other end of the inverting circuit 36 is connected with the positive electrode of the electrolytic capacitor in the main circuit 12, the inverting circuit 19 is connected with the output end of the direct current twelve voltage stabilizing unit 32, the inverting circuit delay resistor 19 is connected with the negative electrode of the third current limiting resistor 26 and the negative electrode of the main circuit delay resistor 28, the inverting circuit delay resistor 26 is connected with the positive electrode of the main circuit isolation diode 30 and the other end of the main circuit isolation diode 30 respectively, the inverting circuit delay resistor 27 is connected with the other end of the inverting circuit delay resistor 26 is connected with the positive electrode of the main circuit isolation diode 30, the positive electrode of the main loop comparator 31 is connected to the connection point of the main loop first voltage dividing resistor 29 and the main loop second voltage dividing resistor 30.
Claims (1)
1. The utility model provides a dual supply time delay control double-interlocking steady voltage power supply box with anti-interference function, including main power supply step-down transformer (1), stand-by power supply step-down transformer (2), main power supply contactor (3) and stand-by power supply contactor (4), characterized by, the one end of 127V output winding of main power supply step-down transformer (1) is in the same place with the input of the first normally open contact of main power supply contactor (3) respectively with one end of the contact control coil of main power supply contactor (3), the other end of the contact control coil of main power supply contactor (3) is in the same place with the common contact of third relay (15), the other end of 127V output winding of main power supply step-down transformer (1) is in the same place with the input of the normally open contact of second relay (14) respectively, the normally closed contact of third relay (15) is in the same place with the common contact of second relay (14), the input of the normally closed contact of main power supply contactor (3) and the output of the normally closed contact of stand-by power supply contactor (4) are in the same place with the output of the first normally open contact of the first side of the main power supply contactor (5) respectively, the output end of the normally-closed contact of the standby power contactor (4) is respectively connected with the output end of the first normally-open contact of the standby power contactor (4) and the other end of the primary side winding (5) of the voltage-stabilizing power transformer, the output end of the first normally-open contact of the main power contactor (3) is connected with the input end of the normally-closed contact of the standby power contactor (4), one end of the 127V output winding of the standby power step-down transformer (2) is connected with one end of the contact control coil of the standby power contactor (4) and the input end of the first normally-open contact of the standby power contactor (4), the other end of the contact control coil of the standby power contactor (4) is connected with the common contact of the first relay (13), the other end of the 127V output winding of the standby power step-down transformer (2) is respectively connected with the normally-open contact of the fourth relay (16) and the input end of the second normally-open contact of the standby power contactor (4), the normally-closed contact of the first relay (13) is connected with the common contact of the fourth relay (16), the other end of the secondary side winding (6) is connected with one end of the voltage-stabilizing power transformer (7) of the output end of the secondary winding (6), the two ends of the resonant winding (7) of the voltage-stabilizing power transformer are connected with a resonant capacitor (8) and a resonant inductor (9) which are connected in series, the middle tap of the resonant winding (7) of the voltage-stabilizing power transformer is connected with the other end of the power output end (10), the twenty-four volt control output end of the main power voltage-reducing transformer (1) is connected with the input end of the twenty-four volt rectifying power supply (12) of the main power circuit, the twenty-four volt control output end of the standby power voltage-reducing transformer (2) is connected with the input end of the twenty-four volt rectifying power supply (11) of the standby power circuit, the output end of the twenty-four volt rectifying power supply (12) of the main power circuit is respectively connected with the output end of the twenty-four volt rectifying power supply (11) of the standby power supply circuit and the input end of the direct-twelve volt voltage-stabilizing unit (32), the output end of the direct-current twelve voltage-stabilizing unit (32) is respectively connected with one end of the control coil of the third relay (15), one end of the control coil of the fourth relay (16), one end of the control coil of the first relay (13) and one end of the control coil of the second relay (14) are respectively connected with the emitter of the third relay (18) of the second relay (14) and the triode (18) of the other end of the second relay is respectively connected with the triode (18), the base of the second Darlington triode (18) is connected with one end of a second current limiting resistor (34), the other end of the second current limiting resistor (34) is connected with the output end of a comparator (25) of a standby power supply loop, the other end of a control coil of the first relay (13) is respectively connected with the other end of a control coil of the second relay (14) and the emitter of the first Darlington triode (17), the collector of the first Darlington triode (17) is connected with the ground, the base of the first Darlington triode (17) is connected with one end of a first current limiting resistor (33), the other end of the first current limiting resistor (33) is connected with the output end of a comparator (31) of a standby power supply loop, the positive electrode of an electrolytic capacitor in the twenty-four-volt rectifying power supply loop (12) is connected with the negative electrode of a standby loop isolation diode (20), a standby loop first voltage dividing resistor (23) and a standby loop (24) are arranged between the output end of the direct current twelve-volt voltage stabilizing unit (32) and a ground point, the base of the first Darlington triode (17) is connected with one end of the standby resistor (24) and the standby loop (24), the other end of the first current limiting resistor (33) is connected with the output end of the standby resistor (25) in series, the standby resistor (21) is connected with the standby voltage dividing resistor (21) and the standby loop, the connection of the standby loop delay resistor (22) and the positive electrode of the standby loop delay capacitor (21) is respectively connected with the positive electrode of the standby loop isolation diode (20) and the input negative electrode of the standby loop comparator (25), the base of the inverting circuit (19) is connected with one end of a fourth current limiting resistor (36), the other end of the fourth current limiting resistor (36) is connected with the positive electrode of an electrolytic capacitor in the main loop twenty-four volt rectification power supply (12), the negative electrode of the electrolytic capacitor is grounded, the emitter of the inverting circuit (19) is connected with the output end of the direct current twelve volt voltage stabilizing unit (32), the collector of the inverting circuit (19) is respectively connected with one end of a third current limiting resistor (35), one end of a delay resistor (27) and the negative electrode of the main loop isolation diode (26), the positive electrode of the main loop isolation diode (26) is respectively connected with the other end of the main loop delay resistor (27), the positive electrode of the main loop delay capacitor (28) is connected with the positive electrode of the main loop delay diode (28) and the negative electrode of the main loop delay diode (26) is connected with the output end of the main loop delay unit (30) in series, the inverting circuit delay resistor (28) is connected with the output end of the main loop delay unit (30) and the main loop delay unit (30), the positive electrode of the main loop comparator (31) is connected at the connection point of the first voltage dividing resistor (29) of the main loop and the second voltage dividing resistor (30) of the main loop,
the dual-power delay control dual-interlocking alternating current stabilized power supply box with the anti-interference function is characterized in that dual-power switching delay circuits are respectively designed on two paths of control signal loops, one path of original work in two paths of power supplies is firstly powered off in the switching control of control signals 00, 01 and 10, and the other path of power supply to be switched is powered on after being delayed for 3 seconds, namely, the switching time sequence of the main power supply work is 10 main power supply work, 3 seconds after 00 is switched, and then 01 is switched to standby power supply work, the switching time sequence of the standby power supply work is 01 standby power supply work, 3 seconds after 00 is switched, and then 10 is switched to the main power supply work, and the delay time is adjustable, so that voltage superposition caused by two paths of power supply switching is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610088641.6A CN107093924B (en) | 2016-02-17 | 2016-02-17 | Dual-power delay control dual-interlocking alternating-current stabilized voltage supply box with anti-interference function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610088641.6A CN107093924B (en) | 2016-02-17 | 2016-02-17 | Dual-power delay control dual-interlocking alternating-current stabilized voltage supply box with anti-interference function |
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| CN107093924A CN107093924A (en) | 2017-08-25 |
| CN107093924B true CN107093924B (en) | 2023-10-13 |
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| CN110994753B (en) * | 2019-12-24 | 2021-06-15 | 广州极飞科技股份有限公司 | Charging device and generator charger |
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