CN103474953A - Single-phase mains voltage controller - Google Patents
Single-phase mains voltage controller Download PDFInfo
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Abstract
The invention provides a single-phase mains voltage controller. A master control circuit substrate is used for sampling a mains supply, contrast is made according to an upper / lower limit voltage allowed by electric equipment, only voltages within the upper / lower limit range can make a CPU control circuit on the master control circuit substrate output a control signal to enable a normally open relay to be closed so that power can be supplied to the electric equipment, and therefore the safety of the electric equipment can be ensured. Once abnormality occurs, the CPU control circuit controls the relay to be disconnected in time, a status indication circuit is used for making acoustic and optical alarms, and therefore assistance is provided for a worker to get rid of a dangerous case in time. Therefore, the single-phase mains voltage controller has the advantages of being high in accuracy, sensitive in detection, stable and reliable in performance, high in circuit integration, small in size, compact in structure, concise in layout, low in price, safe and reliable. When an abnormal voltage is loaded instantaneously, the single-phase mains voltage controller can timely and effectively protect the electric equipment against damage, thereby ensuring the safety of the electric equipment.
Description
[technical field]
The present invention relates to a kind of single-phase line voltage controller of monitoring in real time that voltage is implemented.
[background technology]
Because country variant is different with the single-phase industrial voltage that area is used, as Japanese single-phase voltage is 100V/200V; The single-phase voltage of the U.S. is 115V/230V; Canadian single-phase voltage is 120V/240V; The single-phase voltage of Korea S is 110V/220V.So, in order to meet the demand of various countries, the product that a lot of companies produce also roughly is divided into 100V by voltage, 120V, the 220V three types, for this reason, these manufacturing industry factories are when producing, and its factory's distribution is also that 100V is arranged, the differentiation of 120V and 220V.And, along with factory advances the production model of producing as required (Just In Time), produce frequently between the product of different voltages and be switching to certainty, this situation that also must cause voltage to misplug often occurs, thus the danger such as the product that easily is damaged.In order to remove a hidden danger, reduce Influence of production and the economic loss of due to product, doing over again and bringing, the development and application of voltage management and control instrument is imperative, and the applicant has developed a kind of single-phase line voltage controller for this reason.
[summary of the invention]
The objective of the invention is to be to overcome the deficiencies in the prior art, provide a kind of precision high, detect sensitive, stable and reliable for performance single-phase line voltage controller, it can protect power consumption equipment not to be damaged timely and effectively, thereby guarantees the safety of power consumption equipment.
In order to solve the technical problem of above-mentioned existence, the present invention adopts following technical proposals:
A kind of single-phase line voltage controller, it includes control box, be arranged on the control box different lateral, be used for respectively the power input socket be connected with external commercial power and the Voltage-output socket be connected with power consumption equipment, be arranged on open type high power relay group and governor circuit substrate in control box, be arranged on manual reset switch, digital voltmeter and the gear configuration switch SW1 in control box front; Described high power relay group includes three relay R 1, R2 and R3 of difference corresponding 100V, 120V and tri-kinds of voltage channels of 220V, and it drives signal to be respectively 100RL, 120RL and 220RL; Described governor circuit substrate includes three groups or door and hands over straight power converting circuit, straight power converting circuit, the special-purpose DC5V of CPU to hand over straight power converting circuit, cpu control circuit, rectifying and wave-filtering sample circuit, has two limit door comparison circuits, signal amplification driving circuit, one-out-three electronic switching circuit and the controller state indication circuits of lagging characteristics, wherein:
It is to convert alternating current to direct current 24V and 5V that described three groups or door are handed over a straight power converting circuit; Should straight straight power converting circuit be to convert after the direct current of 12V, 15V direct current 24V to be supplied to the governor circuit substrate each circuit; The special-purpose DC5V of described CPU hands over straight power converting circuit by after handing over straight power module to convert 9V to, then realizes by 7805 circuit of three-terminal voltage-stabilizing integrated the DC5V voltage supply that cpu circuit is stable;
Described cpu control circuit receives the input signal of the output end signal of electronic switch signal selected from the one-out-three electronic switching circuit, two limit door comparison circuits and the city power recovery manual reset switch after normal;
Described one-out-three electronic switching circuit includes by connection control relay K1, the K2 of corresponding 100V, 120V and tri-kinds of input voltages of 220V and connection control circuit and the bidirectional analog switch U5 that is CD4066 by model, the reference voltage that U6 forms that K3 forms are selected circuit respectively; Described bidirectional analog switch U5 includes analog switch U5A, the U5B of corresponding 100V passage and analog switch U5C, the U5D of corresponding 120V passage; Described bidirectional analog switch U6 includes analog switch U6A, the U6B of corresponding 220V passage and analog switch U6C, the U6D of corresponding two limit door comparison circuits;
The sampled voltage VIN of described voltage commutation filtering sampling circuit is connected with the inverting input (-) of the two limit door comparison circuits with lagging characteristics; Described in-phase input end (+) VCIN-with two limit door comparison circuits of lagging characteristics is connected with the analog switch U6C of bidirectional analog switch U6 and the input of U6D respectively with VCIN+, analog switch U6C and U6D gating end are forced to be set as high level by level configuration switch SW2 and are made switch conduction, form positive feedback, form the two limit door comparison circuits with lagging characteristics together with the LM393 comparator, sampled voltage, by after the examination of comparison circuit, is exported to cpu control circuit by result;
After described driving signal amplification circuit receives the discriminator signal as a result of cpu control circuit, if judge that voltage is normal, driving signal 100RL, the 120RL of relay R 1, R2 or the R3 of respective channel or 220RL make the coil of this passage relay obtain electric rear closure;
The output of described controller state indication circuit is provided with voltage status indicator light, buzzer.
In the improvement project to above-mentioned a kind of single-phase line voltage controller, described voltage status indicator light has overvoltage, under-voltage, normal and lock four kinds of voltage indicator lamps; Described buzzer can send respectively different chimes of dooms when overvoltage or under-voltage generation.
Compared with prior art, the invention has the beneficial effects as follows: because it is sampled to civil power and the up/down voltage limit that allows according to power consumption equipment compares by the governor circuit substrate, after only the voltage in up/down limit scope could make the relay closes of normally open by the output of the cpu control circuit on substrate control signal, could power to power consumption equipment, so just can guarantee the safety of power consumption equipment.Once and abnormal, cpu control circuit instant control relay again disconnects, and the warning of being sent sound, light by the state representation circuit, thereby can remove the dangerous condition and offer help in time for the staff.Therefore to have precision high in the present invention, detects sensitive, stable and reliable for performance characteristics.And, also there is circuit integration high, small volume, compact conformation, layout is succinct, cheap, safe and reliable characteristics.When abnormal voltage moment loading, can protect timely and effectively power consumption equipment not to be damaged, thereby guarantee the safety of power consumption equipment.
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
[accompanying drawing explanation]
Fig. 1 is the integral layout schematic diagram of the embodiment of the present invention;
Fig. 2 is the operation principle block diagram of the embodiment of the present invention;
Fig. 3 is the circuit diagram of the governor circuit substrate control section of the embodiment of the present invention;
Fig. 4 is the circuit diagram of the governor circuit substrate periphery part of the embodiment of the present invention.
[embodiment]
The present invention is a kind of single-phase line voltage controller, as shown in Figures 1 to 4, it includes control box 1, be arranged on control box 1 different lateral, be used for respectively the power input socket 2 be connected with external commercial power and the Voltage-output socket 3 be connected with power consumption equipment 4, be arranged on open type high power relay group 5 and governor circuit substrate in control box 1, be arranged on manual reset switch 7, digital voltmeter 8 and the gear configuration switch SW1 in control box 1 front; Described high power relay group 5 includes three relay R 1, R2 and R3 of difference corresponding 100V, 120V and tri-kinds of voltage channels of 220V, and it drives signal to be respectively 100RL, 120RL and 220RL; Described governor circuit substrate includes three groups or door and hands over straight power converting circuit 61, straight power converting circuit 62, the special-purpose DC5V of CPU to hand over straight power converting circuit 63, cpu control circuit 64, rectifying and wave-filtering sample circuit 65, has two limit door comparison circuits 66, signal amplification driving circuit 67, one-out-three electronic switching circuit 68 and the controller state indication circuits 69 of lagging characteristics, wherein:
It is to convert alternating current to direct current 24V and 5V that three groups or door are handed over a straight power converting circuit 61, and its main feature is that this circuit just can be exported direct current 24V and 5V as long as input has any one voltage input at least, and wherein 5V is voltmeter head 8 power source specials.Straight straight power converting circuit 62 is to convert after the direct current of 12V, 15V direct current 24V to be supplied to the governor circuit substrate each circuit.For stability and the antijamming capability that improves the CPU power supply, special design the special-purpose DC5V of CPU hand over straight power converting circuit 63, it is by after handing over straight power module to convert 9V to, then realizes by 7805 circuit of three-terminal voltage-stabilizing integrated the DC5V voltage supply that cpu circuit is stable.
In the present embodiment, the CPU model of described cpu control circuit 64 is commonly used and cheap 89S52, reception selected electronic switch signal from one-out-three electronic switching circuit 68, the input signal of the manual reset switch 7 after the output end signal of two limit door comparison circuits 66 and city power recovery are normal.When bringing into use, gear configuration switch SW1 be set to power consumption equipment 4 will with the voltage gear control the up/down limit reference voltages of the selected two limit door comparison circuits 66 of one-out-three electronic switching circuit 68, and signal is transferred to CPU.
Described one-out-three electronic switching circuit 68 includes by connection control relay K1, the K2 of corresponding 100V, 120V and tri-kinds of input voltages of 220V and connection control circuit 682 and the bidirectional analog switch U5 that is CD4066 by model, the reference voltage that U6 forms that K3 forms are selected circuit 681 respectively; Described bidirectional analog switch U5 includes analog switch U5A, the U5B of corresponding 100V passage and analog switch U5C, the U5D of corresponding 120V passage; Described bidirectional analog switch U6 includes analog switch U6A, the U6B of corresponding 220V passage and analog switch U6C, the U6D of corresponding two limit door comparison circuits 66.Each analog switch has an input and an output, and they can Alternate, also has a gating end (claiming again control end), when elected go side is high level, and switch conduction; When elected go side is low level, the switch cut-off.During use the gating end be do not allow unsettled.Usually the voltage of power consumption equipment roughly is divided into 100V, 120V, and the 220V three types, the controlled signal 100EN of this three types voltage channel, 120EN, 220EN, be controlled by one-out-three electronic switching circuit 68.So just can be by the selected up/down limit reference voltage be complementary with power consumption equipment of one-out-three electronic switching circuit 68; Can find out, the effect of one-out-three electronic switching circuit 68 is that three selectable voltage gears of assurance can only be selected wherein one grade simultaneously, and can guarantee like this has and only have a road effective in three tunnels outputs; Also limit simultaneously can only have with it, be complementary on the way/the lower limit reference voltage is input to comparator (two limit door comparison circuits that have lagging characteristics), can thoroughly effectively avoids like this phenomenon of different Voltage-output channel errors to occur.
The sampled voltage VIN of described voltage commutation filtering sampling circuit 65 is connected with the inverting input (-) of the two limit door comparison circuits 66 with lagging characteristics; Described in-phase input end (+) VCIN-with two limit door comparison circuits 66 of lagging characteristics is connected with the analog switch U6C of bidirectional analog switch U6 and the input of U6D respectively with VCIN+, analog switch U6C and U6D gating end are forced to be set as high level by level configuration switch SW2 and are made switch conduction, form positive feedback, form the two limit door comparison circuits 66 with lagging characteristics together with the LM393 comparator.Because the fluctuation of civil power is larger, if small interference is especially arranged near threshold value, output voltage will be cut off and lock protection, and impact is produced normally.Introduce positive feedback and can overcome this shortcoming in circuit.Its sensitivity is low, but antijamming capability improves greatly.Sampled voltage, by after the examination of comparison circuit, is exported to cpu control circuit 64 by result.
After described driving signal amplification circuit 67 receives the discriminator signal as a result of cpu control circuit 64, if judge that voltage is normal, it is electric that driving signal 100RL, the 120RL of relay R 1, R2 or the R3 of respective channel or 220RL obtain the coil of this passage relay, thereby make corresponding relay R 1, R2 or the R3 closure of relay group 5.
The output of described controller state indication circuit 69 is provided with voltage status indicator light 691, buzzer 692, wherein voltage status indicator light 691 has overvoltage, under-voltage, normal and lock four kinds of voltage indicator lamps, and, when overvoltage or under-voltage generation, buzzer 692 will send respectively different chimes of dooms.
The present invention in use, first power input socket 2 is connected with external commercial power, again Voltage-output socket 3 is connected with power consumption equipment 4, when civil power comes from power input socket 2 inputs like this, due to the control that is subject to the governor circuit substrate, high power relay group 5 can be not closed immediately, at this moment, line voltage is through rectifying and wave-filtering sample circuit 65, enter the inverting input (-) of the two limit door comparison circuits 66 with lagging characteristics after one-out-three electronic switching circuit 68, the reference voltage selected with cpu control circuit compares, after the up/down voltage limit set is compared, comparative result feeds back to cpu control circuit, CPU just can export the signal of respective channel, amplify and drove afterwards high power relay group 5 through the signal amplification circuit 67 of overdriving again, make its normally opened contact closure.Like this, the voltage in specification limits could be exported by the Voltage-output socket end, used with electricity supply and use equipment 4.And occurring too high or too lowly when abnormal when line voltage, the not closed line voltage that makes of relay group 5 is blocked, thereby can not have influence on power consumption equipment 4.Even power consumption equipment 4 is in use, if mains fluctuation is too large, exceed limited range, voltage sampling circuit 65 will collect bad signal so.Bad signal makes the reversion of comparator output terminal signal generation low and high level and flows to CPU, and after CPU receives signal, follow procedure requires to turn off the signal of controlling the high power relay closure.The high power relay dead electricity, the normally opened contact disconnection that resets, power output end does not have Voltage-output immediately, thus the Electrical Safety of protection electrical appliance exempts from abnormal voltage and destroys.After once under-voltage or overvoltage occur, normal even line voltage recovers, also can only reset and just can make this controller recover normal operation by the state of unlocking by manual operation manual reset switch 7, to guarantee the safety of power consumption equipment.When abnormal, cpu control circuit 64 is confirmed high power relay group 5 dead electricity, and the normally opened contact of relay group 5 resets when disconnecting, and controls on the one hand the sound that buzzer sends warning, and indicator light shows it is overvoltage or of a specified duration the pressure, reminds the user to note; On the other hand, voltage controller can enter the state of automatically locking, though at this moment the input city power recovery normal, it also not again automatic control relay obtain the electric Voltage-output that makes, avoid the generation of accident.Only have through operating personnel confirm errorless after, and manually press RESET/ reset switch 7, this instrument could be according to above-mentioned testing process, civil power to input is screened, if at this moment civil power meets the setting requirement, will again control high power relay and obtain the electric Voltage-output that makes, power to power consumption equipment.In addition, in the present embodiment, also be provided with a digital voltmeter 8 on the front of control box, the real-time voltage value of civil power will show strictly according to the facts, for user's reference, thereby can observe more intuitively at any time civil power.
As can be seen from above, the present invention is sampled to civil power by the governor circuit substrate, and after the up/down voltage limit allowed according to power consumption equipment compares, after only the voltage in up/down limit scope could make relay group 5 closures of normally open by the cpu control circuit 63 output control signals on substrate, could power to power consumption equipment, so just can guarantee the safety of power consumption equipment, once and abnormal, cpu control circuit 64 instant control relay group 5 again disconnects, and send sound by controller state indication circuit 69, the warning of light, for removing the dangerous condition in time, the staff provides warning.Therefore to have precision high in the present invention, detects sensitive, stable and reliable for performance characteristics; And, also there is circuit integration high, small volume, compact conformation, layout is succinct, cheap, safe and reliable characteristics.When abnormal voltage moment loading, can protect timely and effectively power consumption equipment not to be damaged, thereby guarantee the safety of power consumption equipment.
The 100V of the present invention to power consumption equipment, 120V, tri-kinds of voltages of 220V judge specification as:
100V series: be normal between 85 to 115V, otherwise be judged to be abnormal;
120V series: be normal between 108 to 132V, otherwise be judged to be abnormal;
220V series: be normal between 198 to 242V, otherwise be judged to be abnormal.
Be only preferred embodiment of the present invention in sum, not be used for limiting practical range of the present invention, i.e. all equivalences of doing according to the content of the present patent application the scope of the claims change and modify, and all should belong to technology category of the present invention.
Claims (2)
1. a single-phase line voltage controller, it is characterized in that, it includes control box (1), be arranged on control box (1) different lateral, be used for respectively the power input socket (2) be connected with external commercial power and the Voltage-output socket (3) be connected with power consumption equipment (4), be arranged on open type high power relay group (5) and governor circuit substrate in control box (1), be arranged on control box (1) positive manual reset switch (7), digital voltmeter (8) and gear configuration switch SW1; Described high power relay group (5) includes three relay R 1, R2 and R3 of difference corresponding 100V, 120V and tri-kinds of voltage channels of 220V, and it drives signal to be respectively 100RL, 120RL and 220RL; Described governor circuit substrate includes three groups or door and hands over straight power converting circuit (61), straight power converting circuit (62), the special-purpose DC5V of CPU to hand over straight power converting circuit (63), cpu control circuit (64), rectifying and wave-filtering sample circuit (65), has two limit door comparison circuits (66), signal amplification driving circuit (67), one-out-three electronic switching circuit (68) and the controller state indication circuits (69) of lagging characteristics, wherein:
It is to convert alternating current to direct current 24V and 5V that described three groups or door are handed over a straight power converting circuit (61); Should straight straight power converting circuit (62) be to convert after the direct current of 12V, 15V direct current 24V to be supplied to the governor circuit substrate each circuit; The special-purpose DC5V of described CPU hands over straight power converting circuit (63) by after handing over straight power module to convert 9V to, then realizes by 7805 circuit of three-terminal voltage-stabilizing integrated the DC5V voltage supply that cpu circuit is stable;
Described cpu control circuit (64) receives the input signal of the output end signal of electronic switch signal selected from one-out-three electronic switching circuit (68), two limit door comparison circuits (66) and the city power recovery manual reset switch (7) after normal;
Described one-out-three electronic switching circuit (68) includes by connection control relay K1, the K2 of corresponding 100V, 120V and tri-kinds of input voltages of 220V and connection control circuit (682) and the bidirectional analog switch U5 that is CD4066 by model, the reference voltage that U6 forms that K3 forms are selected circuit (681) respectively; Described bidirectional analog switch U5 includes analog switch U5A, the U5B of corresponding 100V passage and analog switch U5C, the U5D of corresponding 120V passage; Described bidirectional analog switch U6 includes analog switch U6A, the U6B of corresponding 220V passage and analog switch U6C, the U6D of corresponding two limit door comparison circuits (66);
The sampled voltage VIN of described voltage commutation filtering sampling circuit (65) is connected with the inverting input (-) of the two limit door comparison circuits (66) with lagging characteristics; Described in-phase input end (+) VCIN-with two limit door comparison circuits (66) of lagging characteristics is connected with the analog switch U6C of bidirectional analog switch U6 and the input of U6D respectively with VCIN+, analog switch U6C and U6D gating end are forced to be set as high level by level configuration switch SW2 and are made switch conduction, form positive feedback, form the two limit door comparison circuits (66) with lagging characteristics together with the LM393 comparator, sampled voltage, by after the examination of comparison circuit, is exported to cpu control circuit (64) by result;
After described driving signal amplification circuit (67) receives the discriminator signal as a result of cpu control circuit (64), if judge that voltage is normal, driving signal 100RL, the 120RL of relay R 1, R2 or the R3 of respective channel or 220RL make the coil of this passage relay obtain electric rear closure;
The output of described controller state indication circuit (69) is provided with voltage status indicator light (691), buzzer (692).
2. single-phase line voltage controller according to claim 1, is characterized in that, described voltage status indicator light (691) has overvoltage, under-voltage, normal and lock four kinds of voltage indicator lamps; Described buzzer (692) can send respectively different chimes of dooms when overvoltage or under-voltage generation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310410979.5A CN103474953B (en) | 2013-09-11 | 2013-09-11 | Single-phase line voltage controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310410979.5A CN103474953B (en) | 2013-09-11 | 2013-09-11 | Single-phase line voltage controller |
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| CN103474953A true CN103474953A (en) | 2013-12-25 |
| CN103474953B CN103474953B (en) | 2016-01-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283306A (en) * | 2014-06-30 | 2015-01-14 | 温州异星电子科技有限公司 | Intelligent power supply switcher |
| CN108683159A (en) * | 2018-04-27 | 2018-10-19 | 东莞市熠源电子科技有限公司 | The power supply protection circuit and its control method of anti-abrupt voltage wave |
| CN109951669A (en) * | 2019-04-18 | 2019-06-28 | 浙江西谷数字技术股份有限公司 | Building talkback indoor terminal and its security detection method |
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| KR100883771B1 (en) * | 2007-08-13 | 2009-02-18 | 삼화디에스피주식회사 | Electronic relay for open phase and reverse voltage protection |
| CN201590645U (en) * | 2009-12-10 | 2010-09-22 | 厦门科华恒盛股份有限公司 | AC input over-voltage and under-voltage protection device for electric apparatus |
| CN201813140U (en) * | 2010-08-31 | 2011-04-27 | 北京理工大学 | Voltage control circuit based on field-effect transistor |
| CN102655320A (en) * | 2011-03-02 | 2012-09-05 | 海洋王照明科技股份有限公司 | Voltage control protection circuit |
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2013
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Patent Citations (4)
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| KR100883771B1 (en) * | 2007-08-13 | 2009-02-18 | 삼화디에스피주식회사 | Electronic relay for open phase and reverse voltage protection |
| CN201590645U (en) * | 2009-12-10 | 2010-09-22 | 厦门科华恒盛股份有限公司 | AC input over-voltage and under-voltage protection device for electric apparatus |
| CN201813140U (en) * | 2010-08-31 | 2011-04-27 | 北京理工大学 | Voltage control circuit based on field-effect transistor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104283306A (en) * | 2014-06-30 | 2015-01-14 | 温州异星电子科技有限公司 | Intelligent power supply switcher |
| CN108683159A (en) * | 2018-04-27 | 2018-10-19 | 东莞市熠源电子科技有限公司 | The power supply protection circuit and its control method of anti-abrupt voltage wave |
| CN109951669A (en) * | 2019-04-18 | 2019-06-28 | 浙江西谷数字技术股份有限公司 | Building talkback indoor terminal and its security detection method |
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| CN103474953B (en) | 2016-01-20 |
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Granted publication date: 20160120 |