CN210444186U

CN210444186U - High-efficiency power inverter device

Info

Publication number: CN210444186U
Application number: CN201921954584.0U
Authority: CN
Inventors: 冉庆锋
Original assignee: Shenzhen Technical Jingwei Electronics Co Ltd
Current assignee: Shenzhen Technical Jingwei Electronics Co Ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-05-01
Anticipated expiration: 2029-11-13

Abstract

A high-efficiency power inverter device comprises a power inverter body, a storage battery pack, a power inverter body charger, a voltage reduction circuit, a low-voltage detection circuit, a high-voltage detection circuit, a control circuit, a time delay power-off circuit and a power failure control relay; the voltage reduction circuit, the low voltage detection circuit, the high voltage detection circuit, the control circuit, the time delay power-off circuit, the power failure control relay, the power inverter body, the storage battery pack and the power inverter body charger are arranged in the element box and connected through a lead. This is novel not only have ordinary power inverter power supply unit, continue the function for the consumer power supply after the commercial power has a power failure, still have can automatic switch on power inverter body for the consumer power supply when commercial power input voltage is too high or low excessively, automatic recovery commercial power is the consumer power supply after the power supply voltage is stable, can not appear the problem that the power interruption brought the influence to the normal work of consumer, has guaranteed that the consumer works under suitable voltage.

Description

High-efficiency power inverter device

Technical Field

The utility model relates to a power supply unit field, especially a high efficiency power inverter device.

Background

The power inverter power supply equipment is an electrical equipment which is widely used, and the main structure of the power inverter power supply equipment comprises a plurality of storage batteries, a power inverter body, a charging and control circuit and the like which are connected in series, wherein the charging and control circuit is used for fully charging a storage battery pack during work, and the power inverter power supply equipment is switched on between the power output end of the power inverter body and the power input end of the electrical equipment after the input power supply has a power failure, so that the power output by the storage battery pack is converted into an alternating current power supply through the power inverter body, and.

The existing power inverter power supply equipment only has the function of continuously supplying power to the power utilization equipment during power failure because of the structural limitation. In practical situations, when the power supply area is in a state of frequent voltage instability, the power supply area does not have the function of providing a stable voltage power supply for the electric equipment (including the voltage is frequently too low or too high); in general, a voltage regulator needs to be provided in such a situation, but when the input voltage of the voltage regulator is too low (the voltage regulators all have the minimum input voltage requirement), the output voltage cannot be guaranteed to meet the power consumption requirement of the electric equipment, so that certain disadvantages exist. The unstable power supply voltage can affect the normal work of the electric equipment, for example, a computer can bring great influence to the normal work of the computer due to automatic shutdown caused by too low input voltage, and particularly, the computer can bring greater influence to a user when processing important data is suddenly shut down; when the input voltage is too high, the computer may be damaged. Based on the above, it is particularly necessary to provide a power supply device of a power inverter, which not only has the function of a common power supply device of a power inverter, but also can automatically provide a stable voltage power supply for a power device when the input power supply voltage is too high or too low.

SUMMERY OF THE UTILITY MODEL

In order to overcome the drawback that current power inverter power supply unit exists because of the structure limit, the utility model provides a not only have ordinary power inverter power supply unit, continue the function for the consumer power supply after the commercial power has a power failure, still have input voltage height monitoring function, can switch on the power inverter body automatically when commercial power input voltage is too high or low excessively for the consumer power supply, automatic recovery commercial power is the consumer power supply after the power supply voltage is stable, and in the power supply conversion, the problem that power interruption brought the influence to the normal work of consumer can not appear, guaranteed the work of consumer under suitable voltage from this, a high efficiency power inverter device that the power supply voltage unstability brought the influence to the normal work of consumer as far as possible has been reduced.

The utility model provides a technical scheme that its technical problem adopted is:

a high-efficiency power inverter device comprises a power inverter body, a storage battery pack and a power inverter body charger, and is characterized by also comprising a voltage reduction circuit, a low-voltage detection circuit, a high-voltage detection circuit, a control circuit, a time-delay power-off circuit and a power failure control relay; the voltage reduction circuit, the low-voltage detection circuit, the high-voltage detection circuit, the control circuit, the time delay power-off circuit, the power failure control relay, the power inverter body, the storage battery pack and the power inverter body charger are arranged in the element box; the two ends of the power supply input of the voltage reduction circuit, the power supply inverter body charger and the power failure control relay are respectively connected with the two poles of the 220V alternating-current power supply through leads, the two ends of the power supply output of the voltage reduction circuit and the two ends of the power supply input of the low-voltage detection circuit, the high-voltage detection circuit and the time delay power-off circuit are respectively connected through leads, and the two ends of the power supply output of the low-voltage monitoring circuit and the high-voltage detection circuit and the two ends of the power supply input of the control circuit are respectively; the power output ends of the power failure control relay, the control power output ends of the control circuit and the positive and negative pole power input ends of the power inverter body are respectively connected through leads, and the positive and negative poles of the storage battery pack, the two control power input ends of the power failure control relay, the two control power input ends of the control circuit and the power output ends of the power inverter body charger are respectively connected through leads; the power supply inverter comprises a power supply inverter body, a 220V alternating current power supply, a control circuit and electric equipment, wherein two ends of the power supply output of the power supply inverter body and two ends of the power supply input of the electric equipment are respectively connected through leads; the signal output end of the control circuit is connected with the signal input end of the time-delay power-off circuit through a lead, the control power supply input end of the time-delay power-off circuit is connected with the positive pole and the negative pole of the storage battery through leads, and the control power supply output end of the time-delay power-off circuit is connected with the positive pole and the negative pole of the power inverter body charger through leads.

Furthermore, the voltage reduction circuit comprises a power transformer, a rectifier bridge stack and an electrolytic capacitor, wherein the power transformer, the rectifier bridge stack and the electrolytic capacitor are connected through a circuit board in a wiring mode,

pins

1 and 2 of a power input end of the rectifier bridge stack are respectively connected with two ends of a secondary winding of the power transformer, and

pins

3 and 4 of a power output end of the rectifier bridge stack are respectively connected with positive and negative poles of the electrolytic capacitor.

Furthermore, the low-voltage monitoring circuit and the high-voltage detecting circuit are consistent in structure and respectively comprise a circuit adjustable resistor, a micro-power consumption three-terminal voltage integrated monitoring circuit, a resistor, a diode, AN NPN triode and a relay, wherein the circuit adjustable resistor, the micro-power consumption three-terminal voltage integrated monitoring circuit, the resistor, the diode, the NPN triode and the relay are connected through circuit board wiring, the model of the three-terminal voltage integrated monitoring circuit is AN051A, one end of the adjustable resistor is connected with the positive power input end of the relay and the control power input end, the other end of the adjustable resistor is connected with the positive power input end of the three-terminal voltage integrated monitoring circuit, the negative power input end of the three-terminal voltage integrated monitoring circuit is connected with the emitting electrode of the NPN; the normally closed contact end of the relay of the low-voltage monitoring circuit is connected with the anode of the diode, and the normally open contact end of the relay of the high-voltage monitoring circuit is connected with the anode of the diode.

Further, the control circuit comprises relays, a time base integrated circuit with the model number of NE555, resistors, an electrolytic capacitor, an NPN triode and a switch diode, wherein the relays are connected through circuit board wiring, a first relay positive power input end is connected with a second relay positive power input end and a control power input end, a second relay normally-open contact end is connected with one end of the first resistor, one end of the second resistor, the anode of the switch diode, the pin 4 of the reset end and the pin 8 of the positive power input end of the time base integrated circuit, the pin 8 of the positive power input end of a third relay and the control power input end, the cathode of the switch diode is connected with the anode of the electrolytic capacitor, the other end of the second resistor, the pin 2 of the trigger end and the pin 6 of the threshold end of the time base integrated circuit, the pin 3 of the output end of the time base integrated circuit is connected with one end of the third resistor, and the, the collector of the NPN triode is connected with the negative power input end of a third relay, the normally closed contact end of the third relay is connected with the positive power input end of a fourth relay, and the negative power input end of the first relay is connected with the negative power input end of the second relay, the other end of the first resistor, the negative electrode of the electrolytic capacitor, the pin 1 of the negative power input end of the time base integrated circuit, the emitter of the NPN triode and the negative power input end of the fourth relay.

Furthermore, the time-delay power-off circuit comprises a time-delay shutdown module and a relay, wherein the time-delay shutdown module and the relay are connected through circuit board wiring, two power output ends of the time-delay shutdown module and two power input ends of a second relay are respectively connected, two trigger signal input ends of the time-delay shutdown module are respectively connected with a control power input end and a normally open contact end of a first relay, and a negative power input end of the first relay is connected with a negative power input end of the time-delay shutdown module.

Further, the power failure control relay is an alternating current relay.

The utility model has the advantages that: in the novel application, when power failure does not occur at ordinary times, the power inverter body charger automatically charges the storage battery pack, and meanwhile, the 220V power supply of the commercial power supplies power for the power equipment; when the mains supply is powered off, the power failure control relay can be automatically switched on between the storage battery pack and the power inverter body, and then the power inverter body normally supplies power for the power utilization equipment (the working principle of the power inverter body is consistent with that of the existing power inverter power supply equipment). When the input voltage is too low or too high, the low-voltage monitoring circuit or the high-voltage detection circuit can be automatically connected between the storage battery pack and the power inverter body, and then a stable 220V alternating-current power supply output by the power inverter body normally supplies power to the electric equipment, so that the influence on the normal work of the electric equipment caused by too high or too low voltage is avoided; under the action of the control circuit, the low-voltage monitoring circuit or the high-voltage detection circuit cannot cause the problem that the normal work of the electric equipment is affected by the power interruption (the power supply is temporarily interrupted and then switched on to cause the electric equipment to be halted, for example, a computer needs to be restarted after power failure and then power re-electrifying, inconvenience is brought to a user, and processing data before power failure is lost and the like) in the power supply conversion process; under the effect of the time-delay power-off circuit, after the 220V mains supply is recovered to be normal, the mains supply is converted into the mains supply power supply process by the power inverter body, and the problem that the normal work of the electric equipment is affected by the power interruption can not occur. This is novel has guaranteed that consumer works under suitable voltage, has reduced the influence that supply voltage unstability brought consumer normal work as far as possible. Based on the above, so this novel application prospect that has.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a block diagram showing the structure of the present invention.

Fig. 2 is a structural diagram of the present invention.

Fig. 3 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, a high-efficiency power inverter device includes a power inverter body 1, a 36V battery pack 2, a power inverter body charger 3, a voltage reduction circuit 4, a low voltage detection circuit 5, a high voltage detection circuit 6, a control circuit 7, a delayed power-off circuit 8, and a power-off control relay 9; the voltage reduction circuit 4, the low-voltage detection circuit 5, the high-voltage detection circuit 6, the control circuit 7, the time-delay power-off circuit 8 and the power failure control relay 9 are installed on a circuit board, and the circuit board, the power inverter body 1, the 36V storage battery pack 2 and the power inverter body charger 3 are installed in a component box 10.

As shown in fig. 2 and 3, the power inverter body D4 is a finished product of a power inverter with a brand KIM Maier and a model TCI-3000W, and has an input voltage of about 36V for direct current, an output power of 220V for alternating current and a power of 3 KW; the 36V battery pack G has three batteries (connected in series), and each battery is 12V/40 Ah. The power inverter body charger D3 is a finished product of an alternating current 220V-to-direct current 36V charger with model number SQN-201, and can automatically stop outputting power after a 36V storage battery G is fully charged (the functions are the same as those of an electric bicycle charger and the like). The voltage reduction circuit comprises a power transformer T with the model of 220V/6V/5W, a rectifier bridge stack D1 with the model of GBL406 and an electrolytic capacitor C1 which are connected through circuit board wiring,

pins

1 and 2 of a power input end of the rectifier bridge stack D1 are respectively connected with two ends of a secondary winding of the power transformer T, and

pins

3 and 4 of a power output end of the rectifier bridge stack D1 are respectively connected with the positive electrode and the negative electrode of the electrolytic capacitor C1. The low-voltage monitoring circuit comprises a circuit adjustable resistor RP1, a micro-power consumption three-terminal voltage integrated monitoring circuit D2, a resistor R1, a diode VD, an NPN triode Q1 and a relay K1, the three-terminal voltage integrated monitoring circuit D2 model is AN051A, one end of the adjustable resistor RP1 is connected with the positive power input end of the relay K1 and the control power input end, the other end of the adjustable resistor RP1 is connected with a pin 2 at the positive power input end of the three-terminal voltage integrated monitoring circuit D2, a pin 3 at the negative power input end of the three-terminal voltage integrated monitoring circuit D2 is connected with an emitter of an NPN triode Q1, a pin 1 at the output end of the three-terminal voltage integrated monitoring circuit D2 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a base of the NPN triode Q1, a collector of the NPN triode Q1 is connected with the negative power input end of a relay K1, and a normally closed contact end of the relay K829. The high-voltage monitoring circuit comprises a circuit adjustable resistor RP2, a micro-power consumption three-terminal voltage integrated monitoring circuit D6, a resistor R4, a diode VD1, an NPN triode Q3 and a relay K9, the three-terminal voltage integrated monitoring circuit D6 model is AN051A, one end of the adjustable resistor RP2 is connected with the positive power input end of the relay K9 and the control power input end, the other end of the adjustable resistor RP2 is connected with a pin 2 at the positive power input end of the three-terminal voltage integrated monitoring circuit D6, a pin 3 at the negative power input end of the three-terminal voltage integrated monitoring circuit D6 is connected with an emitter of an NPN triode Q3, a pin 1 at the output end of the three-terminal voltage integrated monitoring circuit D6 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with a base of an NPN triode Q3, a collector of the NPN triode Q3 is connected with the negative power input end of a relay K9, and a normally open contact end of the relay K9 is. The control circuit comprises relays K2, K3, K4, K5, a time-base integrated circuit D5 of a model NE555, resistors R5, R6 and R7, an electrolytic capacitor C2, an NPN triode Q4 and a switch diode VD3 which are connected through circuit board wiring, wherein a positive power supply input end of a first relay K2 is connected with a positive power supply input end and a control power supply input end of a second relay K3, a normally-open contact end of the second relay K3 is connected with one end of the first resistor R5, one end of a second resistor R6, a positive electrode of a switch diode VD3, a pin 4 of a reset end and a pin 8 of the positive power supply input end of the time-base integrated circuit D5, a positive power supply input end and a control power supply input end of a third relay K4, a normally-closed contact end of the third relay K4 is connected with a positive power supply input end of a fourth relay K5, a negative electrode of the switch diode VD3 is connected with a positive electrode of the electrolytic capacitor C2, the other end of the second relay R6, a trigger end D5 and, the output end 3 pin of the time base integrated circuit D5 is connected with one end of a third resistor R7, the other end of the third resistor R7 is connected with the base electrode of an NPN triode Q4, the collector electrode of the NPN triode Q4 is connected with the negative power input end of a third relay K4, the negative power input end of a first relay K2 is connected with the negative power input end of a second relay K3, the other end of the first resistor R5, the negative electrode of an electrolytic capacitor C2, the negative power input end 1 pin of the time base integrated circuit D5, the emitter electrode of an NPN triode Q4 and the negative power input end of a fourth relay K5. The delayed power-off circuit comprises a finished product D7 of a delayed power-off module with a brand fresh air and a model TK1306-DS, relays K7 and K6 which are connected through circuit board wiring, the finished product D7 of the delayed power-off module comprises two

power input ends

1 and 2 pins, two

trigger signal terminals

3 and 4 pins, two power output ends 5 and 6 pins, when the delayed power-off module works, the power input ends 1 and 2 pins are electrified, after the two

trigger signal terminals

3 and 4 pins are communicated, the two power output ends 5 and 6 pins can immediately output power, after the two

trigger signal terminals

3 and 4 pins are disconnected, the two power output ends 5 and 6 pins disconnect the power of the two output ends 1 second, the two power output ends 5 and 6 pins of the delayed power-off module finished product D7 are respectively connected with the two power input ends of the second relay K7, the two trigger

signal input ends

3 and 4 pins of the delayed power-off module finished product D7 are respectively connected with a control power input end and a normally open contact end of the first relay K, and the negative power supply input end of the first relay K6 is connected with the negative power supply input end 2 pin of the finished delayed shutdown module D7. The power failure control relay K8 is an AC 220V working voltage relay (Brand Songle) with two power input ends, two control power input ends, two normally open contact ends and two normally closed contact ends.

As shown in fig. 2 and 3, the two ends of the primary winding of the transformer T at the two ends of the power input of the step-down circuit, the two

ends

1 and 2 pins of the power input of the power inverter body charger D3, the two ends of the power input of the power failure control relay K8, and the two poles of the 220V ac power supply are respectively connected by wires. The electrolytic capacitors C1 at the two ends of the power output of the voltage reduction circuit, one end of the adjustable resistor RP1 at the two ends of the power input of the low-voltage detection circuit and the emitter of the NPN triode Q1, one end of the adjustable resistor RP2 at the two ends of the power input of the high-voltage detection circuit and the emitter of the NPN triode Q3, and the

pins

1 and 2 of the finished product D7 of the delayed shutdown module at the two ends of the power input of the delayed power-off circuit are respectively connected through leads. The diode VD negative electrode and the NPN triode Q1 emitting electrode at two ends of the power supply output of the low-voltage detection circuit, the diode VD1 negative electrode and the NPN triode Q3 emitting electrode at two ends of the power supply output of the high-voltage detection circuit, the positive power supply input end of the power supply input relay K2 of the control circuit and the negative electrode of the electrolytic capacitor C2 are respectively connected through leads. Two normally closed contact ends at two ends of a power output of the power failure control relay K8, two normally open contact ends of a relay K2 of the control circuit and

pins

1 and 2 of a positive and negative pole power input end of a power inverter body D4 are respectively connected through leads. The positive and negative poles of the storage battery pack G, the two control power supply input ends of the power failure control relay K8, the two control power supply input ends of the relay K2 of the control circuit and the two 3 and 4 pins of the power output end of the power inverter body charger D3 are respectively connected through leads. The two

ends

3 and 4 of the power output of the power inverter body D4 and the two ends of the power input of the electric equipment YD are respectively connected through leads. The 220V alternating current power supply and two control power supply input ends of two alternating current control power supply input ends of the control circuit relay K5 are respectively connected through leads. Two normally closed contact ends of a relay K5 at two ends of the alternating current control power output of the control circuit and two ends of the power input of the electric equipment YD are respectively connected through leads. The signal output end relay K3 normally open contact end of the control circuit is connected with the signal input end relay K6 positive power supply input end of the delay power-off circuit through a lead. Two control power supply input ends of a relay K7 of the time-delay power-off circuit are respectively connected with the positive and negative poles of the storage battery pack G through leads. Two normally closed contact ends of a control power output end relay K7 of the time-delay power-off circuit are respectively connected with

pins

1 and 2 of a positive and negative pole power input end of a power inverter body charger D4 through leads.

As shown in fig. 2 and 3, when the commercial power 220V has no power failure at ordinary times, the 220V ac power will enter the two power input ends (two primary winding ends) of the power transformer T of the step-down circuit, and the two power input ends of the power inverter body charger D3 and the power failure control relay K8, so that the power inverter body charger D3 outputs a stable 36V power to charge the battery pack G under the action of its internal circuit (the output voltage of the power inverter body charger D3 is about 41V, the output power can be automatically stopped after the 36V battery pack G is fully charged, and the functions are the same as those of an electric bicycle charger, etc.), and it is ensured that the subsequent battery pack G can supply power to the power inverter body D4. When the commercial power 220V alternating current power supply has no power failure at ordinary times, two control power supply input ends and two normally closed contact ends of the relay K8 in an electrified attraction state are respectively opened, because the power output by the storage battery G cannot enter the

pins

1 and 2 of the power inverter body D4 through the two normally closed contact ends of the relay K8, the

pins

3 and 4 of the power inverter body D4 cannot output alternating current power supply to enter two power supply input ends of the electric equipment YD, the commercial power 220V alternating current power supply passes through the two control power supply input ends of the relay K5 of the control circuit, and the two normally closed contact ends respectively enter the two power supply input ends of the electric equipment YD, and therefore, the commercial power 220V alternating current power supply normally supplies power for the electric equipment. When the commercial power 220V alternating current power supply is in power failure at ordinary times, two control power supply input ends and two normally closed contact ends of the relay K8 in a power failure and non-attraction state are respectively connected, so that a positive and negative two-pole power supply output by the storage battery group G can enter

pins

1 and 2 of the power inverter body D4 through the two normally closed contact ends of the relay K8 and two control power supply input ends (the two control power supply input ends of the relay K8 are respectively connected with the positive and negative poles of the storage battery group G), 3 pins and 4 pins of the power inverter body D4 output alternating current 220V power supply to enter two ends of the power utilization equipment YD power supply input, and thus the storage battery group G and the power inverter body D4 can normally supply power to the power utilization equipment after the commercial power 220V alternating current power. Through the above, when the commercial power alternating current 220V power supply has no power failure, the commercial power supplies power for the electric equipment YD, and after the power failure, the relay K8 automatically switches the power inverter body D4 to supply power for the electric equipment.

As shown in fig. 2 and 3, after the 220V ac power enters the two ends of the primary winding of the power transformer T of the step-down circuit, the secondary winding will output about 6V ac power to enter the two ends of the power input of the rectifier bridge D1, the rectifier bridge D1 outputs dc power under the action of its internal circuit to enter the two positive and negative poles of the electrolytic capacitor C1, so that the electrolytic capacitor C1 filters the dc power and inputs it to the low voltage detection circuit and the high voltage detection circuit, and the two ends of the power input of the time-delay power-off circuit, the low voltage detection circuit and the high voltage detection circuit, and the time-delay power-off circuit are in the power-on working state. In the low voltage detection circuit: after the low-voltage detection circuit works when power is supplied, the power output by the positive pole and the negative pole of the electrolytic capacitor C1 is subjected to voltage reduction and current limitation by the adjustable resistor RP1 and enters the

power input ends

2 and 3 of the three-terminal voltage integrated monitoring circuit D2, at ordinary times, the voltage of the mains supply alternating current power supply is normal and is above 198V (the actual voltage can be set according to different resistance values of the adjustable resistor RP 1), at the moment, the voltage of the power input end 2 pin of the three-terminal voltage integrated monitoring circuit D2 is subjected to voltage reduction and current limitation by the adjustable resistor RP1 and is higher than the 4.75V threshold voltage in the three-terminal voltage integrated monitoring circuit D2, so that the three-terminal voltage integrated monitoring circuit D2 outputs a high level by the pin 1 under the action of the internal circuit, the voltage is subjected to voltage reduction and current limitation by the resistor R1 and enters the base of the NPN triode Q1, and then the NPN 1 conducts the collector of the NPN 1 to output, the relay K1 is electrified to attract the input end of the control power supply and the normally closed contact end to be open; because the normally closed contact end of the relay K1 is in one-way conduction through the diode VD and is connected with the positive power supply input ends of the relays K2 and K3 of the control circuit, when the mains voltage is not lower than 198V, the relays K2 and K3 of the control circuit are in a power-off state. At ordinary times, when the voltage of the commercial power alternating-current power supply is abnormal and is below 198V, the voltage of a pin 2 at the power supply input end of the three-terminal voltage integrated monitoring circuit D2 after being subjected to voltage reduction and current limitation by the adjustable resistor RP1 is lower than the 4.75V threshold voltage in the three-terminal voltage integrated monitoring circuit D2, so that a pin 1 of the three-terminal voltage integrated monitoring circuit D2 stops outputting a high level to enter the base electrode of the NPN triode Q1 under the action of an internal circuit, the NPN triode Q1 stops outputting a low level to enter the negative power supply input end of the relay K1 after a collector of the NPN triode Q1 is cut off, and the relay K1 is no longer electrified to attract the control; because the normally closed contact end of the relay K1 is in one-way conduction through the diode VD and is connected with the positive power input ends of the relays K2 and K3 of the control circuit, when the mains voltage is lower than 198V, the power output by the positive electrode of the electrolytic capacitor C1 enters the positive power input ends of the relays K2 and K3 of the control circuit through the control power input end and the normally closed contact end of the relay K1; because the negative power supply input ends of the relays K2 and K3 of the control circuit are connected with the negative electrode of the electrolytic capacitor C1, when the mains voltage is lower than 198V, the relays K2 and K3 of the control circuit are both in an electrified pull-in state, and the control power supply input end and the normally open contact end are closed.

As shown in fig. 2 and 3, in the high voltage detection circuit: after the high-voltage detection circuit is powered on to work, the power output by the anode and the cathode of the electrolytic capacitor C1 is subjected to voltage reduction and current limitation by the adjustable resistor RP2 and enters the

power input ends

2 and 3 pins of the three-terminal voltage integrated monitoring circuit D6, when the voltage of the mains supply alternating-current power supply is normal and is below 235.4V (the actual voltage can be set according to different resistance values of an adjustable resistor RP 2), the voltage of a pin 2 at the power supply input end of a three-terminal voltage integrated monitoring circuit D6 after being reduced and limited by an adjustable resistor RP2 is lower than the threshold voltage of 4.75V in a three-terminal voltage integrated monitoring circuit D6, so that a pin 1 of the three-terminal voltage integrated monitoring circuit D2 cannot output a high level to enter the base electrode of an NPN triode Q3 under the action of an internal circuit of the three-terminal voltage integrated monitoring circuit D2, the NPN triode Q3 stops the collector from outputting a low level to enter the negative power supply input end of a relay K9, and the control power supply input end and a normally; because the normally open contact end of the relay K9 is in one-way conduction through the diode VD1 and is connected with the positive power input ends of the relays K2 and K3 of the control circuit, when the mains voltage is not higher than 235.4V, the relays K2 and K3 of the control circuit are in a power-off state. At ordinary times, when the voltage of the commercial power alternating-current power supply is abnormal and is higher than 235.4V, the voltage of a pin 2 at the power input end of the three-terminal voltage integrated monitoring circuit D6 after being subjected to voltage reduction and current limitation by the adjustable resistor RP2 is higher than the threshold voltage of 4.75V in the three-terminal voltage integrated monitoring circuit D6, then, under the action of the internal circuit of the three-terminal voltage integrated monitoring circuit D6, a pin 1 of the three-terminal voltage integrated monitoring circuit outputs high level, the high level is subjected to voltage reduction and current limitation by the resistor R4 and enters the base electrode of an NPN triode Q3, further, the NPN triode Q3 is conducted, the collector outputs low level and enters the negative power input end of a relay K9 (the positive power input end of the relay K9 and the control power input end are communicated with the positive electrode; because the normally open contact end of the relay K9 is in one-way conduction through the diode VD1 and is connected with the positive power input ends of the relays K2 and K3 of the control circuit, when the mains voltage is higher than 235.4V, the power output by the positive electrode of the electrolytic capacitor C1 enters the positive power input ends of the relays K2 and K3 of the control circuit through the relay K9 control power input end and the normally open contact end; because the negative power supply input ends of the relays K2 and K3 of the control circuit are connected with the negative electrode of the electrolytic capacitor C1, when the mains voltage is higher than 235.4V, the relays K2 and K3 of the control circuit are both in an electrified attraction state, and the control power supply input end and the normally open contact end are closed.

As shown in fig. 2 and 3, in the control circuit, when the commercial power voltage is unstable at ordinary times, and is higher than 235.4V or lower than 198V, the relay K2 and K3 are in the power-on attraction state, and the control power input end and the normally open contact end are closed, because the two control power input ends of the relay K2 are respectively connected with the two poles of the power supply of the storage battery pack G, the two normally open contact ends of the relay K2 are respectively connected with the two

ends

1 and 2 of the power input of the power inverter body D4 through wires, and the two

ends

3 and 4 of the power output of the power inverter body D4 are respectively connected with the two ends of the power input of the power consumption device YD through wires, when the commercial power voltage is unstable at ordinary times, and is higher than 235.4V or lower than 198V, the storage battery pack G can output power and convert the power supply into a 220V alternating current power. After the relay K3 is electrified and closed, the control power supply input end and the normally open contact end of the relay K3 are closed, the anode power supply at the cathode of the diode VD or VD1 enters the

pins

4 and 8 of the time base integrated circuit D5 through the control power supply input end of the relay K3 and the normally open contact end, and the anode of the switch diode VD3, one end of the resistor R6, one end of the resistor R5, the anode power supply input end of the relay J4 and the control power supply input end (the cathode of the electrolytic capacitor C1 is communicated with the cathode of the resistor R5, the cathode of the electrolytic capacitor C2, the pin 1 of the time base integrated circuit D5 and the cathode of the. After the time-base integrated circuit D5 is powered on to work, the time-base integrated circuit D5 is in a set state under the action of an internal circuit thereof and the action of a peripheral element resistor R2 and a switch diode VD3, meanwhile, an anode power supply can be subjected to voltage reduction and current limitation through the resistor R6 to charge an electrolytic capacitor C2, the time-base integrated circuit D5 is kept in the set state all the time when the electrolytic capacitor C2 is not sufficiently charged within 1 second, 3 pins of the time-base integrated circuit D5 output high level and are subjected to voltage reduction and current limitation through the resistor R7 to enter a base electrode of a triode Q4, a collector electrode of the triode NPN Q4 is conducted to output low level to enter a cathode power supply input end of a relay K4, and then the relay K4 is powered on to pull a control power supply input end and a; because the normally closed contact end of the relay K4 is connected with the positive power supply input end of the relay K5, the two control power supply input ends and the two normally closed contact ends of the relay K5 are kept closed respectively at the moment when the relay K5 is in a power-off state; when the charging is about 1 second and about later, the voltage on the electrolytic capacitor C2 is charged to two thirds of the voltage of the power supply (the electrolytic capacitor C1) (namely, the voltage of the 6 pin of the time-base integrated circuit D5 is increased to two thirds of the power supply voltage), the time-base integrated circuit D5 is in a reset state under the action of the internal circuit thereof and the peripheral element resistor R2 and the switch diode VD3, the 3 pin of the time-base integrated circuit D5 stops outputting high level, and further, the relay K4 is de-energized and does not attract the control power supply input end and the normally closed contact end thereof to be closed; because the normally closed contact end of the relay K4 is connected with the positive power supply input end of the relay K5, the two control power supply input ends and the two normally closed contact ends of the relay K5 are in an electrified attraction state at the moment. After the relay K5 is electrified to pull in two control power supply input ends and two normally closed contact ends of the relay K5 to be respectively opened, the two poles of the 220V alternating current power supply are respectively connected with the two control power supply input ends of the relay K5, and the two normally closed contact ends of the relay K5 are respectively connected with the two power supply input ends of the electric equipment YD, so that the 220V alternating current power supply can not enter the electric equipment at the moment. Under the action of the circuit, in practical application, the mains supply voltage is unstable, is higher than 235.4V or is lower than 198V at ordinary times, after the control power supply input end and the normally open contact end of the relays K2 and K3 are in an electrified attracting state, the storage battery group G supplies power to the electric equipment YD through the power inverter body D4, the power supply stops supplying power to the electric equipment YD at an interval of 220V for 1 second, the electric equipment YD is kept uninterrupted in the process, the problem that the mains supply voltage is unstable, is higher than 235.4V or is lower than 198V is solved, the mains supply is disconnected, the storage battery group G is connected again to supply power to the electric equipment YD through the power inverter body D4, power is temporarily cut off during the process, and the problem that the normal work of the electric equipment is influenced when the power supply is interrupted (the power supply is temporarily interrupted and then is connected to cause the halt of the electric equipment, for example, the power interruption of a computer, and can result in loss of processed data before a power outage, etc.).

In fig. 2 and 3, in the delayed power-off circuit: after the time-delay power-off circuit is powered on to work, when the voltage of a mains supply is unstable and is higher than 235.4V or lower than 198V, after the relay K3 is powered on to attract the control power supply input end and the normally open contact end of the relay K3 to be closed, an anode (an electrolytic capacitor C1 anode) power supply output by the normally open contact end of the relay K3 can enter the anode power supply input end of the relay K6 (the cathode power supply input end of the relay K6 is communicated with the cathode of the electrolytic capacitor C1), and then the relay K6 is powered on to attract the control power supply input end and the normally open contact end of the relay K; because the finished product D7 of the delayed shutdown module is in a power-on working state at this moment, under the action of an internal circuit of the finished product D7 of the delayed shutdown module,

pins

5 and 6 of the finished product D7 of the delayed shutdown module immediately output power to enter the positive and negative pole power input ends of the relay K7, and then the relay K7 is powered on to attract the two control power input ends and the two normally open contact ends to be closed; because two control power input ends of the relay K7 are respectively connected with two poles of the battery pack G, and two normally open contact ends of the relay K7 are respectively connected with two power input ends of the power inverter body D4, at the moment, the relay K7 and the relay K2 can be simultaneously switched on between the two poles of the battery pack G and the power input ends of the power inverter body D4, and thus the power inverter body D4 supplies power for the electric equipment YD. In practical situations, when the mains voltage is unstable and is higher than 235.4V or lower than 198V, the power supply returns to normal, is lower than 235.4V and is higher than 198V again, and after the relays K2 and K3 lose power and the control power input ends and the normally open contact ends thereof are opened (meanwhile, after the relays K4 and K5 lose power and are not attracted any more, and after the relays K5 lose power and are not attracted any more, the two control power input ends and the two normally closed contact ends thereof are respectively closed, at the moment, the mains 220V power supply supplies power to the electric equipment YD again through the two control power input ends and the two normally closed contact ends of the relay K5); because the positive electrode output by the normally open contact end of the relay K3 is connected with the positive power input end of the relay K6, at the moment, the relay K6 loses power and no longer attracts the control power input end and the normally open contact end to open, further, the open circuits of the trigger

signal input ends

3 and 4 of the finished product D7 of the delayed shutdown module are not closed, under the action of the internal circuit of the finished product D7 of the delayed shutdown module, the

pins

5 and 6 of the finished product D7 of the delayed shutdown module can also output 1 second of power to enter the positive and negative pole power input ends of the relay K7, the relay K7 continuously keeps the 1 second power-on attracting state, the two control power input ends and the two normally open contact ends of the relay K7 are respectively kept closed for 1 second, and then the two poles of the storage battery G and the power input end of the power inverter body D4; that is, through the above circuit function, when the mains voltage returns to normal, which is not higher than 235.4V and higher than 198V, and the mains 220V ac power supply supplies power to the electric equipment YD, the power inverter D4 will continue to supply power to the electric equipment YD for 1 second; the in-process keeps consumer YD not to cut off the power supply, prevent that mains voltage from recovering when being not higher than 235.4V and being higher than 198V, disconnection storage battery G, do not supply power for consumer YD through power inverter body D4, switch on commercial power 220V alternating current power supply when supplying power for consumer YD, the temporary power cut during it, bring the problem of influence to consumer normal work when the power interruption clearance (power temporary interruption, switch-on again can lead to the consumer to die, for example the computer cuts off power and recanalizes need restart, will bring inconveniently for the user, and can lead to handling data before having a power failure and lose etc.).

As shown in fig. 2 and 3, before the novel production, the resistance values of the adjustable resistors RP1 and RP2 need to be determined. Before the resistance value of the adjustable resistor RP2 is determined, firstly, an input power supply of a primary winding of the transformer T is disconnected, the output end of an external alternating-current adjustable voltage stabilizer is respectively connected to two ends of the primary winding of the transformer T, then the output power supply of the adjustable voltage stabilizer is adjusted to a position (such as 235.5V) slightly larger than 235.4V, then the resistance value of the adjustable resistor RP2 is slowly adjusted, and when a relay K9 is just powered on and attracted (a voltage gear of a multimeter is respectively connected to a normally-open contact end of the relay K9 and an emitting electrode of an NPN triode Q3), the resistance value of the adjustable resistor RP2 is; disconnecting the adjustable voltage stabilizer, disconnecting a lead connected between the adjustable resistor RP2 and a circuit element, measuring the resistance value of the adjustable resistor RP2 by using a universal meter, wherein the measured resistance value is the resistance value normally required by the adjustable resistor RP2, and then connecting the lead of the adjustable resistor RP 2; after the resistance value of the adjustable resistor RP2 is determined, subsequent production does not need to be measured, the resistance value of the adjustable resistor RP2 can be directly adjusted to the proper position for production, and the adjustable resistor RP2 can be replaced by a fixed resistor with the same resistance value; in subsequent use, when the voltage is just higher than 235.4V, the relay K2 can be electrically attracted. Before the resistance value of the adjustable resistor RP1 is determined, an input power supply of a primary winding of the transformer T is disconnected, an output end of an external alternating-current adjustable voltage stabilizer is connected to two ends of the primary winding of the transformer T respectively, then an output power supply of the adjustable voltage stabilizer is adjusted to a position (such as 197.9V) which is slightly smaller than 198V, the resistance value of the adjustable resistor RP1 is adjusted slowly, and when the relay K1 is powered off and is not pulled in any more (a voltage gear of a multimeter is connected to a normally closed contact end of the relay K1 and an emitter of an NPN triode Q1 respectively), the resistance value of the adjustable resistor RP1 is adjusted; disconnecting the adjustable voltage stabilizer, disconnecting a lead connected between the adjustable resistor RP1 and a circuit element, measuring the resistance value of the adjustable resistor RP1 by using a universal meter, wherein the measured resistance value is the resistance value normally required by the adjustable resistor RP1, and then connecting the lead of the adjustable resistor RP 1; after the resistance value of the adjustable resistor RP1 is determined, subsequent production does not need to be measured, the resistance value of the adjustable resistor RP1 can be directly adjusted to the proper position for production, and the adjustable resistor RP1 can be replaced by a fixed resistor with the same resistance value; in subsequent use, when the voltage is just lower than 198V, the relay K1 loses power and no longer pulls in. The novel high-voltage detection circuit and the low-voltage detection circuit can monitor the voltage, can be adjusted according to requirements in production, for example, the used electric equipment has high voltage resistance (higher voltage can be normally used), the high-voltage detection circuit can disconnect the mains supply only when the voltage is higher by adjusting the resistance value of the adjustable resistor RP2, for example, the resistance value of the adjustable resistor RP2 is relatively larger, when the input voltage is 240V, the voltage entering the three-terminal voltage integrated monitoring circuit D4 is higher than 4.75V, the subsequent high-voltage detection circuit can disconnect the mains supply through the control circuit, namely, the electric equipment can work at about 240V; for example, the voltage resistance of the used electric equipment is low (the lower voltage can be used normally), then, by adjusting the resistance value of the adjustable resistor RP1, the low-voltage detection circuit can be disconnected from the mains supply when the voltage is lower, for example, the resistance value of the adjustable resistor RP1 is adjusted to be relatively small, when the input voltage is 170V, the voltage entering the three-terminal voltage integrated monitoring circuit D6 is lower than 4.75V, and the subsequent low-voltage detection circuit is disconnected from the mains supply through the control circuit, that is, the electric equipment can work at about 170V. In this novel, control relay K8 conversion commercial power and storage battery G, power inverter body D4 is consumer YD power supply mode, and current power inverter power supply unit is unanimous basically, therefore, only can be in commercial power failure, storage battery G and power inverter body D4 are in the consumer YD power supply, just the consumer power supply has certain time interval (its control power input end and normally open contact end closure can not avoid the interval fixed time when relay K8 inhales), and in low pressure or high-voltage switching, can not cause the consumer to supply power temporarily. The utility model discloses not only have ordinary power inverter power supply unit, continue the function for the consumer power supply after the commercial power has a power failure, input voltage height monitoring function still has, when commercial power input voltage is too high or low excessively, can automatic switch on power inverter body for the consumer power supply, automatic recovery commercial power is the consumer power supply after the power supply voltage is stable, and in the power supply conversion, the problem that the influence is brought to the normal work of consumer can not appear in the outage, guarantee the work of consumer under suitable voltage from this, the influence that the power supply voltage unstability brought the normal work of consumer has been reduced as far as possible.

In fig. 3, the control relay K8 is a 220V high power relay of the brand song. Relays K1, K2, K3, K4, K5, K6, K7, and K9 are 6V relays of the brand Songle, and have two power input terminals, two control power input terminals, two normally open contact terminals, and two normally closed contact terminals. The adjustable resistors RP1, RP2 are 4.7M. The resistances of the resistors R1, R4, R5, R6 and R7 are respectively 4.7K, 2K, 0.8M and 1K. The model numbers of NPN triodes Q1, Q3 and Q4 are 9013. The models of the diodes VD and VD are 1N 4007. The switching diode VD3 is model 1N 4148. The electrolytic capacitors C1 and C2 are respectively 470 muF/25V and 1 muF/25V.

The essential features of the invention and the advantages of the invention have been shown and described above, it being obvious to a person skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, but that it can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A high-efficiency power inverter device comprises a power inverter body, a storage battery pack and a power inverter body charger, and is characterized by also comprising a voltage reduction circuit, a low-voltage detection circuit, a high-voltage detection circuit, a control circuit, a time-delay power-off circuit and a power failure control relay; the voltage reduction circuit, the low-voltage detection circuit, the high-voltage detection circuit, the control circuit, the time delay power-off circuit, the power failure control relay, the power inverter body, the storage battery pack and the power inverter body charger are arranged in the element box; the two ends of the power supply input of the voltage reduction circuit, the power supply inverter body charger and the power failure control relay are respectively connected with the two poles of the 220V alternating-current power supply through leads, the two ends of the power supply output of the voltage reduction circuit and the two ends of the power supply input of the low-voltage detection circuit, the high-voltage detection circuit and the time delay power-off circuit are respectively connected through leads, and the two ends of the power supply output of the low-voltage monitoring circuit and the high-voltage detection circuit and the two ends of the power supply input of the control circuit are respectively; the power output ends of the power failure control relay, the control power output ends of the control circuit and the positive and negative pole power input ends of the power inverter body are respectively connected through leads, and the positive and negative poles of the storage battery pack, the two control power input ends of the power failure control relay, the two control power input ends of the control circuit and the power output ends of the power inverter body charger are respectively connected through leads; the power supply inverter comprises a power supply inverter body, a 220V alternating current power supply, a control circuit and electric equipment, wherein two ends of the power supply output of the power supply inverter body and two ends of the power supply input of the electric equipment are respectively connected through leads; the signal output end of the control circuit is connected with the signal input end of the time-delay power-off circuit through a lead, the control power supply input end of the time-delay power-off circuit is connected with the positive pole and the negative pole of the storage battery through leads, and the control power supply output end of the time-delay power-off circuit is connected with the positive pole and the negative pole of the power inverter body charger through leads.

2. A high efficiency power inverter apparatus as claimed in claim 1, wherein the step-down circuit comprises a power transformer, a rectifier bridge stack, and an electrolytic capacitor, which are connected by wiring on a circuit board, wherein pins 1 and 2 of the power input terminal of the rectifier bridge stack are connected to both ends of the secondary winding of the power transformer, respectively, and pins 3 and 4 of the power output terminal of the rectifier bridge stack are connected to both positive and negative electrodes of the electrolytic capacitor, respectively.

3. The high efficiency power inverter of claim 1, wherein the low voltage monitoring circuit and the high voltage detecting circuit are configured in a same manner, and each of the low voltage monitoring circuit and the high voltage detecting circuit comprises a tunable resistor, a micro-power consumption three-terminal voltage integrated monitoring circuit, a resistor, a diode, an NPN triode and a relay, the three-terminal voltage integrated monitoring circuit is connected with the circuit board through wiring, the model number of the three-terminal voltage integrated monitoring circuit is AN051A, one end of an adjustable resistor is connected with the input end of a positive power supply of the relay and the input end of a control power supply, the other end of the adjustable resistor is connected with the input end of a positive power supply of a three-terminal voltage integrated monitoring circuit, the input end of a negative power supply of the three-terminal voltage integrated monitoring circuit is connected with an emitting electrode of an NPN triode, a pin 1 at the output end of the three-terminal voltage integrated monitoring circuit is connected with one end of a resistor, the other end of the resistor is connected with a base electrode of the NP; the normally closed contact end of the relay of the low-voltage monitoring circuit is connected with the anode of the diode, and the normally open contact end of the relay of the high-voltage monitoring circuit is connected with the anode of the diode.

4. A high efficiency power inverter apparatus as claimed in claim 1, wherein the control circuit comprises a relay, a time base integrated circuit of type NE555, a resistor, an electrolytic capacitor, an NPN transistor and a switching diode, which are connected by wiring on a circuit board, the positive power input terminal of the first relay is connected to the positive power input terminal of the second relay and the control power input terminal, the normally open contact terminal of the second relay is connected to one terminal of the first resistor, one terminal of the second resistor, the positive terminal of the switching diode, the reset terminal 4 pin and the positive power input terminal 8 pin of the time base integrated circuit, the positive power input terminal of the third relay and the control power input terminal, the negative terminal of the switching diode is connected to the positive terminal of the electrolytic capacitor, the other terminal of the second resistor, the trigger terminal 2 pin and the threshold terminal 6 pin of the time base integrated circuit, the output terminal 3 pin of the time base integrated circuit is connected to one terminal of the third resistor, the other end of the third resistor is connected with the base electrode of the NPN triode, the collector electrode of the NPN triode is connected with the negative power supply input end of the third relay, the normally closed contact end of the third relay is connected with the positive power supply input end of the fourth relay, and the negative power supply input end of the first relay is connected with the negative power supply input end of the second relay, the other end of the first resistor, the negative electrode of the electrolytic capacitor, the pin 1 of the negative power supply input end of the time base integrated circuit, the emitting electrode of the NPN triode and the negative power supply input end of the fourth relay.

5. A high efficiency power inverter apparatus as claimed in claim 1, wherein the delayed power down circuit comprises a delayed shutdown module, a relay connected via circuit board wiring, two power output terminals of the delayed shutdown module and two power input terminals of the second relay are connected respectively, two trigger signal input terminals of the delayed shutdown module are connected respectively to the control power input terminal and the normally open contact terminal of the first relay, and the negative power input terminal of the first relay is connected to the negative power input terminal of the delayed shutdown module.

6. A high efficiency power inverter apparatus as claimed in claim 1 wherein the power outage control relay is an ac relay.