CN104698259A - Electrified detection circuit suitable for three-phase electrical system - Google Patents
Electrified detection circuit suitable for three-phase electrical system Download PDFInfo
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- CN104698259A CN104698259A CN201510062561.9A CN201510062561A CN104698259A CN 104698259 A CN104698259 A CN 104698259A CN 201510062561 A CN201510062561 A CN 201510062561A CN 104698259 A CN104698259 A CN 104698259A
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Abstract
The invention relates to the detection technology field of electrical equipment and discloses an electrified detection circuit suitable for a three-phase electrical system. The electrified detection circuit is characterized in that single three-color light emitting diode can indicate electrified conditions of three electric wires in the to-be-tested equipment by a time-dividing control unit via a time-dividing and color-dividing way; because the flicker component occupies the less surface area of the shell, the electrified detection equipment can be minimized in design.
Description
Technical field
The present invention relates to electric device maintenance technical field, particularly, relate to a kind of electrified detection circuit being applicable to three-phase voltage system.
Background technology
Measuring device with electricity is that one is directly installed on indoor electric equipment, and whether display Devices to test directly perceived is with the indicative safety feature of working voltage.Existing measuring device with electricity can be divided into active and passive two kinds by mode of operation, and the former needs additional power source powered operation, and latter, without the need to additional power source, utilizes self to get inductive energy from Devices to test and provides working power.The measuring device with electricity of passive mode is adopted to have the advantages such as simple, the easy to maintenance and long service life of structure.
Conventional measuring device with electricity mainly comprises induction module and display module, wherein induction module in safe range, untouchable from treating that side apparatus obtains inductive energy, then inductive energy is passed to display module, whether inductive energy acts on flash component by display module, charged by the luminous situation instruction Devices to test of flash component.When Devices to test is charged, induction module obtains inductive energy, and inductive energy acts on flash component the most at last, makes flash component luminescence instruction Devices to test charged; And when Devices to test is without electricity, induction module cannot obtain inductive energy, flash component is not luminous, and without indicating or indicating, Devices to test is not charged.Whether, because the Devices to test being applied in three-phase voltage system needs the charged situation of measurement 3 wire (A line, B line and C line), therefore this type of measuring device with electricity is configured with 3 groups of flash components, to indicate A line, B line and C line charged respectively.Consider that 3 flash components need to take certain surface of shell and amass, will the Miniaturization Design of check strap electric detection means, be therefore necessary to improve.
For the limitation of above-mentioned measuring device with electricity, need to design a kind of electrified detection circuit being applicable to three-phase voltage system, only use one group of flash component can indicate the charged situation of 3 wires in Devices to test, thus make flash component take less surface of shell to amass, be beneficial to the Miniaturization Design of measuring device with electricity.
Summary of the invention
For the limitation of aforementioned strip electric detection means, the invention provides a kind of electrified detection circuit being applicable to three-phase voltage system, only use one group of flash component can indicate the charged situation of 3 wires in Devices to test, the surface area taking housing due to flash component is less, can be beneficial to the Miniaturization Design of measuring device with electricity.
The technical solution used in the present invention, provide a kind of electrified detection circuit being applicable to three-phase voltage system, it is characterized in that, comprising: A phase sensing unit, B phase sensing unit, C phase sensing unit, 3 tunnel rectification drive unit, 3 conducting control elements, Time-sharing control unit and Tricolor LEDs; Described Time-sharing control unit comprises the first output terminal, the second output terminal and the 3rd output terminal, and conducting control element comprises control pole, conducting positive pole and conducting negative pole, and rectification drive unit comprises the first output terminal and the second output terminal; A phase sensing unit, B phase sensing unit are connected a road rectification drive unit respectively with C phase sensing unit, first output terminal of 3 tunnel rectification drive unit connects the conducting positive pole of 1 conducting control element respectively, 3 output terminals of Time-sharing control unit connect the control pole of 1 conducting control element respectively, the conducting negative pole of 3 conducting control elements connects the anode of Tricolor LED, and the second output terminal of 3 tunnel rectification drive unit connects the negative electrode of Tricolor LED.Using described electrified detection circuit to measure in the whether charged process of Devices to test, A phase sensing unit for responding to the working voltage between A line and ground wire, and obtains inductive energy when A tape electricity from A line; B phase sensing unit for responding to the working voltage between B line and ground wire, and obtains inductive energy when B tape electricity from B line; C phase sensing unit for responding to the working voltage between C line and ground wire, and obtains inductive energy when C tape electricity from C line; Described rectification drive unit is used for inductive energy that obtained by connected sensing unit, alternating current form and changes into the inductive energy of direct current form, and carries out accumulation of energy with the light driving Tricolor LED to send corresponding color; Described Time-sharing control unit is for controlling 3 conducting control element timesharing conductings or closedown, and at specific time period, the inductive energy only having corresponding sensing unit to obtain can finally drive Tricolor LED to send the light of corresponding color.Although described electrified detection circuit only uses a Tricolor LED, but the mode by point time division color indicates the charged situation of 3 wires in Devices to test, because Tricolor LED is similar to the light emitting diode size of current employing, therefore flash component takies the surface area of housing less, can be beneficial to the Miniaturization Design of measuring device with electricity.
Concrete, described Time-sharing control unit also comprises clock circuit, frequency-halving circuit, the first not gate, the second not gate, first and door, second and door and the 3rd and door; The output terminal of described clock circuit connects the input end of frequency-halving circuit, the output terminal of clock circuit also connect simultaneously first with the second input end of door, the input end of the second not gate and the 3rd with the second input end of door, the output terminal of frequency-halving circuit connect simultaneously the input end of the first not gate, second with the first input end of door and the 3rd and the first input end of door; First the first output terminal being connected Time-sharing control unit with the output terminal of door, the second the second output terminal being connected Time-sharing control unit with the output terminal of door, the 3rd the 3rd output terminal being connected Time-sharing control unit with the output terminal of door.
Concrete further, described frequency-halving circuit also comprises d type flip flop; The CIK end of described d type flip flop connects the input end of frequency-halving circuit, the D end of d type flip flop connect d type flip flop /Q end, the Q end of d type flip flop connects the output terminal of frequency-halving circuit.
Concrete, described conducting control element is triode or field effect transistor; The base stage of described triode is the control pole of conducting control element, the conducting positive pole of the current collection of triode very conducting control element, the conducting negative pole of the transmitting of triode very conducting control element; The grid of described field effect transistor is the control pole of conducting control element, and the drain electrode of field effect transistor is the conducting positive pole of conducting control element, and the source electrode of field effect transistor is the conducting negative pole of conducting control element.
Concrete, described Tricolor LED is common cathode polar form Tricolor LED or common anode polar form Tricolor LED.
Concrete, described rectification drive unit also comprises diode D1, diode D2, diode D3, diode D4, electric capacity C1, driving circuit, first input end and the second input end; Described driving circuit comprises first input end, the second input end, the first output terminal and the second output terminal; The anode of described diode D1 connects the negative electrode of diode D2, the negative electrode of diode D1 connects the negative electrode of diode D4 and the first end of electric capacity C2 simultaneously, the anode of diode D2 connects the anode of diode D3 and second end of electric capacity C2 simultaneously, and the negative electrode of diode D3 connects the anode of diode D4; The anode of described diode D1 connects the first input end of rectification drive unit simultaneously, the anode of diode D4 connects the second input end of rectification drive unit simultaneously, the first end of electric capacity C2 connects the first input end of driving circuit simultaneously, second end of electric capacity C2 connects the second input end of driving circuit simultaneously, first output terminal of driving circuit connects the first output terminal of rectification drive unit, and the second output terminal of driving circuit connects the second output terminal of rectification drive unit.Described diode D1, diode D2, diode D3 and diode D4 form a bridge rectifier circuit, inductive energy that the sensing unit be connected with rectification drive unit can be obtained, that have alternating current form is converted into the inductive energy of direct current form, and in the charging accumulation of energy of electric capacity C1 place, to drive Tricolor LED to send the light of corresponding color.
Concrete further, described driving circuit also comprises stabilivolt DZ1, diode D5, unidirectional thyristor SCR1 and resistance R1; The negative electrode of described stabilivolt DZ1 connects first input end and the unidirectional thyristor SCR1 anode of driving circuit simultaneously, the anode of stabilivolt DZ1 connects the anode of diode D5, the negative electrode of diode D5 connects the gate pole of unidirectional thyristor SCR1, the first end of the negative electrode contact resistance R1 of unidirectional thyristor SCR1, second end of resistance R1 connects the first output terminal of driving circuit, and the second input end of driving circuit connects the second output terminal of driving circuit.
Concrete further, described Tricolor LED is common cathode polar form Tricolor LED, common cathode polar form Tricolor LED comprises 3 anodes and 1 common cathode, the conducting negative pole of 3 conducting control elements connects three anodes of common cathode polar form Tricolor LED respectively, and the second output terminal of 3 tunnel rectification drive unit connects the common cathode of common cathode polar form Tricolor LED simultaneously; Or, described Tricolor LED is common anode polar form Tricolor LED, common anode polar form Tricolor LED comprises 1 common anode pole and 3 negative electrodes, the conducting negative pole of 3 conducting control elements connects the common anode pole of common anode polar form Tricolor LED simultaneously, and the second output terminal of 3 tunnel rectification drive unit connects three negative electrodes of common anode polar form Tricolor LED respectively.
Concrete further, described A phase sensing unit is made up of the first induction pole plate GB1 and the 4th induction pole plate GB4, first induction pole plate GB1 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit; Described B phase sensing unit is made up of the second induction pole plate GB2 and the 4th induction pole plate GB4, and the second induction pole plate GB2 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit.Described C phase sensing unit is made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4, and the 3rd induction pole plate GB3 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit.Described first induction pole plate GB1 is used near A line, second induction pole plate GB2 is used near B line, 3rd induction pole plate GB3 is used near C line, 4th induction pole plate GB4 is used near ground wire, therefore the A phase sensing unit be made up of the first induction pole plate GB1 and the 4th induction pole plate GB4 can respond to the working voltage between A line and ground wire, the B phase sensing unit be made up of the second induction pole plate GB2 and the 4th induction pole plate GB4 can respond to the working voltage between B line and ground wire, the C phase sensing unit be made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4 can respond to the working voltage between C line and ground wire.
To sum up, adopt the electrified detection circuit being applicable to three-phase voltage system provided by the present invention, the charged situation utilizing Time-sharing control unit can realize single Tricolor LED to divide 3 wires in the instruction Devices to test of time division color, the surface area taking housing due to flash component is less, can be beneficial to the Miniaturization Design of measuring device with electricity.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 be the embodiment of the present invention provide the first be applicable to the circuit diagram of the electrified detection circuit of three-phase voltage system.
Fig. 2 be the embodiment of the present invention provide the first be applicable to the circuit diagram of Time-sharing control unit in the electrified detection circuit of three-phase voltage system.
Fig. 3 be the embodiment of the present invention provide the first be applicable to the circuit diagram of rectification drive unit in the electrified detection circuit of three-phase voltage system.
Fig. 4 be the embodiment of the present invention provide the first be applicable to the electrified detection circuit of three-phase voltage system timesharing detect schematic diagram.
Fig. 5 is the circuit diagram that the second that the embodiment of the present invention provides is applicable to the electrified detection circuit of three-phase voltage system.
Embodiment
Hereinafter with reference to accompanying drawing, describe the electrified detection circuit being applicable to three-phase voltage system provided by the invention in detail by way of example.It should be noted that at this, the explanation for these way of example understands the present invention for helping, but does not form limitation of the invention.
Various technology described herein may be used for but is not limited to electric device maintenance technical field, can also be used for other similar field.
Term " positive pole " and " anode " are often used interchangeably in the text herein, and term " negative pole " and " negative electrode " are often used interchangeably in the text.Term "and/or" herein, it is only a kind of incidence relation describing affiliated partner, three kinds of relations can be there are in expression, such as, A and/or B, can represent: individualism A, individualism B, there are A and B tri-kinds of situations simultaneously, herein term " or/and " be describe another kind of affiliated partner relation, can there are two kinds of relations in expression, such as, A is or/and B, can represent: individualism A, individualism A and B two kinds of situations, in addition, character "/" herein, general expression forward-backward correlation is to liking a kind of "or" relation.
Embodiment one, Fig. 1 show the present embodiment and provide the first be applicable to the circuit diagram of the electrified detection circuit of three-phase voltage system, Fig. 2 show the present embodiment and provide the first be applicable to the circuit diagram of Time-sharing control unit in the electrified detection circuit of three-phase voltage system, Fig. 3 show the present embodiment and provide the first be applicable to the circuit diagram of rectification drive unit in the electrified detection circuit of three-phase voltage system, the first timesharing being applicable to the electrified detection circuit of three-phase voltage system that Fig. 4 shows the present embodiment and provides detects schematic diagram.The described electrified detection circuit being applicable to three-phase voltage system, is characterized in that, comprising: A phase sensing unit, B phase sensing unit, C phase sensing unit, 3 tunnel rectification drive unit, 3 conducting control elements, Time-sharing control unit and Tricolor LEDs; Described Time-sharing control unit comprises the first output terminal, the second output terminal and the 3rd output terminal, and conducting control element comprises control pole, conducting positive pole and conducting negative pole, and rectification drive unit comprises the first output terminal and the second output terminal; A phase sensing unit, B phase sensing unit are connected a road rectification drive unit respectively with C phase sensing unit, first output terminal of 3 tunnel rectification drive unit connects the conducting positive pole of 1 conducting control element respectively, 3 output terminals of Time-sharing control unit connect the control pole of 1 conducting control element respectively, the conducting negative pole of 3 conducting control elements connects the anode of Tricolor LED, and the second output terminal of 3 tunnel rectification drive unit connects the negative electrode of Tricolor LED.Using described electrified detection circuit to measure in the whether charged process of Devices to test, A phase sensing unit for responding to the working voltage between A line and ground wire, and obtains inductive energy when A tape electricity from A line; B phase sensing unit for responding to the working voltage between B line and ground wire, and obtains inductive energy when B tape electricity from B line; C phase sensing unit for responding to the working voltage between C line and ground wire, and obtains inductive energy when C tape electricity from C line; Described rectification drive unit is used for inductive energy that obtained by connected sensing unit, alternating current form and changes into the inductive energy of direct current form, and carries out accumulation of energy with the light driving Tricolor LED to send corresponding color; Described Time-sharing control unit is for controlling 3 conducting control element timesharing conductings or closedown, and at specific time period, the inductive energy only having corresponding sensing unit to obtain can finally drive Tricolor LED to send the light of corresponding color.Although described electrified detection circuit only uses a Tricolor LED, but the mode by point time division color indicates the charged situation of 3 wires in Devices to test, the surface area taking housing due to flash component is less, can be beneficial to the Miniaturization Design of measuring device with electricity.
Concrete, described Time-sharing control unit also comprises clock circuit, frequency-halving circuit, the first not gate, the second not gate, first and door, second and door and the 3rd and door; The output terminal of described clock circuit connects the input end of frequency-halving circuit, the output terminal of clock circuit also connect simultaneously first with the second input end of door, the input end of the second not gate and the 3rd with the second input end of door, the output terminal of frequency-halving circuit connect simultaneously the input end of the first not gate, second with the first input end of door and the 3rd and the first input end of door; First the first output terminal being connected Time-sharing control unit with the output terminal of door, the second the second output terminal being connected Time-sharing control unit with the output terminal of door, the 3rd the 3rd output terminal being connected Time-sharing control unit with the output terminal of door.As shown in Figure 4, described clock circuit exports the basic clock signal of " 0/1 " form, and frequency-halving circuit is by basic clock signal frequency division, export two doubling times, the sub-frequency clock signal of " 0/1 " form, again by coordinating with door and 2 not gates with 3, cycle length can be divided into and be divided into four (self-inspection periods time period, the A tape electro-detection period, B tape electro-detection period and C tape electro-detection period), in the different time periods, each output terminal exports different level signals, thus control corresponding conducting control element timesharing conducting or closedown, at specific time period, only having corresponding sensing unit can do the inductive energy obtained can finally drive Tricolor LED to send corresponding light.
Concrete further, described frequency-halving circuit also comprises d type flip flop; The CIK end of described d type flip flop connects the input end of frequency-halving circuit, the D end of d type flip flop connect d type flip flop /Q end, the Q end of d type flip flop connects the output terminal of frequency-halving circuit.Described frequency-halving circuit utilizes the circuit characteristic of d type flip flop to realize the frequency division of basic clock signal, and structure is simple, is easy to realize.
Concrete, described conducting control element is triode or field effect transistor; The base stage of described triode is the control pole of conducting control element, the conducting positive pole of the current collection of triode very conducting control element, the conducting negative pole of the transmitting of triode very conducting control element; The grid of described field effect transistor is the control pole of conducting control element, and the drain electrode of field effect transistor is the conducting positive pole of conducting control element, and the source electrode of field effect transistor is the conducting negative pole of conducting control element.As what optimize, as shown in Figure 1, described conducting control element is triode Q1, triode Q2 and triode Q3 in the present embodiment, the collector of the first output terminal connecting triode Q1 of the rectification drive unit that A phase sensing unit is corresponding, the collector of the first output terminal connecting triode Q2 of the rectification drive unit that B phase sensing unit is corresponding, the collector of the first output terminal connecting triode Q3 of the rectification drive unit that C phase sensing unit is corresponding.
Concrete, described rectification drive unit also comprises diode D1, diode D2, diode D3, diode D4, electric capacity C1, driving circuit, first input end and the second input end; Described driving circuit comprises first input end, the second input end, the first output terminal and the second output terminal; The anode of described diode D1 connects the negative electrode of diode D2, the negative electrode of diode D1 connects the negative electrode of diode D4 and the first end of electric capacity C2 simultaneously, the anode of diode D2 connects the anode of diode D3 and second end of electric capacity C2 simultaneously, and the negative electrode of diode D3 connects the anode of diode D4; The anode of described diode D1 connects the first input end of rectification drive unit simultaneously, the anode of diode D4 connects the second input end of rectification drive unit simultaneously, the first end of electric capacity C2 connects the first input end of driving circuit simultaneously, second end of electric capacity C2 connects the second input end of driving circuit simultaneously, first output terminal of driving circuit connects the first output terminal of rectification drive unit, and the second output terminal of driving circuit connects the second output terminal of rectification drive unit.Described diode D1, diode D2, diode D3 and diode D4 form a bridge rectifier circuit, inductive energy that the sensing unit be connected with rectification drive unit can be obtained, that have alternating current form is converted into the inductive energy of direct current form, and in the charging accumulation of energy of electric capacity C1 place, to drive Tricolor LED to send the light of corresponding color.
Concrete further, described driving circuit also comprises stabilivolt DZ1, diode D5, unidirectional thyristor SCR1 and resistance R1; The negative electrode of described stabilivolt DZ1 connects first input end and the unidirectional thyristor SCR1 anode of driving circuit simultaneously, the anode of stabilivolt DZ1 connects the anode of diode D5, the negative electrode of diode D5 connects the gate pole of unidirectional thyristor SCR1, the first end of the negative electrode contact resistance R1 of unidirectional thyristor SCR1, second end of resistance R1 connects the first output terminal of driving circuit, and the second input end of driving circuit connects the second output terminal of driving circuit.When the inductive energy that described driving circuit is used for storing at electric capacity C1 place is enough to effectively drive Tricolor LED to send the light of corresponding color, conducting loop makes Tricolor LED send the light of corresponding color; When the inductive energy stored at electric capacity C1 place is not enough to effectively drive Tricolor LED to send the light of corresponding color, closes closed loop and make C1 continue charging.
Concrete further, described Tricolor LED is common cathode polar form Tricolor LED, common cathode polar form Tricolor LED comprises 3 anodes and 1 common cathode, the conducting negative pole of 3 conducting control elements connects three anodes of common cathode polar form Tricolor LED respectively, and the second output terminal of 3 tunnel rectification drive unit connects the common cathode of common cathode polar form Tricolor LED simultaneously.Described Tricolor LED is the one in light emitting diode, PN junctions different for 3 glow colors is encapsulated in a transparent tube core by it, both 3 PN junctions can have been made to send the light of corresponding color respectively, wherein any 2 PN junctions or 3 PN junctions also can be made simultaneously to send the light of corresponding color.Citing, as shown in Figure 1, ruddiness can be sent for one, the Tricolor LED of green glow and blue light, the control pole of the first output terminal connecting triode Q1 of Time-sharing control unit, the control pole of the second output terminal connecting triode Q2 of Time-sharing control unit, the control pole of the 3rd output terminal connecting triode Q3 of Time-sharing control unit, the emitter simultaneously arranging the triode Q1 corresponding with A phase sensing unit connects the PN junction anode that can send ruddiness, the emitter arranging the triode Q2 corresponding with B phase sensing unit connects the PN junction anode that can send green glow, the emitter arranging the triode Q3 corresponding with C phase sensing unit connects the PN junction anode that can send blue light, then composition graphs 4 instruction content that divides time-division colour light emitting situation corresponding for described Tricolor LED is as shown in table 1 below:
The corresponding table of luminescence instruction of table 1, Tricolor LED
Concrete further, described A phase sensing unit is made up of the first induction pole plate GB1 and the 4th induction pole plate GB4, first induction pole plate GB1 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit; Described B phase sensing unit is made up of the second induction pole plate GB2 and the 4th induction pole plate GB4, and the second induction pole plate GB2 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit.Described C phase sensing unit is made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4, and the 3rd induction pole plate GB3 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit.Described first induction pole plate GB1 is used near A line, second induction pole plate GB2 is used near B line, 3rd induction pole plate GB3 is used near C line, 4th induction pole plate GB4 is used near ground wire, therefore the A phase sensing unit be made up of the first induction pole plate GB1 and the 4th induction pole plate GB4 can respond to the working voltage between A line and ground wire, the B phase sensing unit be made up of the second induction pole plate GB2 and the 4th induction pole plate GB4 can respond to the working voltage between B line and ground wire, the C phase sensing unit be made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4 can respond to the working voltage between C line and ground wire.
The principle of work of what embodiment one provided the be applicable to electrified detection circuit of three-phase voltage system is as follows: the A line in Devices to test, when B line and C line are distinguished charged, utilize high voltage induction principle, described A phase sensing unit, B phase sensing unit and C phase sensing unit can obtain inductive energy non-contactly from corresponding line, the inductive energy of alternating current form is converted into the inductive energy of direct current form by the bridge rectifier circuit in corresponding rectification drive unit, DC voltage after rectification carries out charging accumulation of energy and filtering at corresponding electric capacity C1 place, along with the rising of corresponding electric capacity C1 both end voltage, when reaching first object voltage (when the inductive energy that electric capacity C1 stores is enough to effectively drive Tricolor LED to send the light of corresponding color), stabilivolt DZ1 in corresponding driving circuit and diode D5 conducting, thus be the gate pole input trigger voltage/electric current of unidirectional thyristor SCR1, make conducting between the anode of unidirectional thyristor SCR1 and negative electrode, if be now the live detection period of corresponding electric wire, then Time-sharing control unit makes corresponding conducting control element conducting, electric capacity C1 discharges and discharges inductive energy, and drive Tricolor LED to send the light of corresponding color, indicate corresponding electric wire charged, if be not now the live detection period of corresponding electric wire, then Time-sharing control unit makes corresponding conducting control element close, and electric capacity C1 need continue to wait for, the light driving Tricolor LED to send corresponding color until the conducting of conducting control element could be discharged.Electric capacity C1 in rectification drive unit declines through overdischarge both end voltage, when the inductive energy that electric capacity C1 stores is not enough to effectively drive Tricolor LED to send the light of corresponding color, stabilivolt DZ1 in corresponding driving circuit and diode D5 ends, also end between the anode of unidirectional thyristor SCR1 and negative electrode, electric capacity C1 enters into charging process again, continues the inductive energy storing the acquisition of corresponding sensing unit.
The electrified detection circuit being applicable to three-phase voltage system described described in the present embodiment, the charged situation utilizing Time-sharing control unit can realize single Tricolor LED to divide 3 wires in the instruction Devices to test of time division color, the surface area taking housing due to flash component is less, can be beneficial to the Miniaturization Design of measuring device with electricity.
The second that embodiment two, Fig. 5 shows the present embodiment to be provided is applicable to the circuit diagram of the electrified detection circuit of three-phase voltage system.The difference being applicable to the electrified detection circuit of three-phase voltage system that the electrified detection circuit of what embodiment two provided be applicable to three-phase voltage system and embodiment one provide is: described Tricolor LED is common anode polar form Tricolor LED, common anode polar form Tricolor LED comprises 1 common anode pole and 3 negative electrodes, the conducting negative pole of 3 conducting control elements connects the common anode pole of common anode polar form Tricolor LED simultaneously, and the second output terminal of 3 tunnel rectification drive unit connects 3 negative electrodes of common anode polar form Tricolor LED respectively.
Described circuit structure in embodiment two illustrates the concrete connected mode of another kind of Tricolor LED, and its technique effect can, with reference to the technique effect of embodiment one, not needed can be obtained by performing creative labour.
As mentioned above, the present invention can be realized preferably.For a person skilled in the art, according to instruction of the present invention, designing the multi-form electrified detection circuit being applicable to three-phase voltage system does not need performing creative labour.Without departing from the principles and spirit of the present invention these embodiments changed, revise, replace, integrate and modification still falls within the scope of protection of the present invention.
Claims (9)
1. be applicable to an electrified detection circuit for three-phase voltage system, it is characterized in that, comprising: A phase sensing unit, B phase sensing unit, C phase sensing unit, 3 tunnel rectification drive unit, 3 conducting control elements, Time-sharing control unit and Tricolor LEDs;
Described Time-sharing control unit comprises the first output terminal, the second output terminal and the 3rd output terminal, and conducting control element comprises control pole, conducting positive pole and conducting negative pole, and rectification drive unit comprises the first output terminal and the second output terminal;
A phase sensing unit, B phase sensing unit are connected a road rectification drive unit respectively with C phase sensing unit, first output terminal of 3 tunnel rectification drive unit connects the conducting positive pole of 1 conducting control element respectively, 3 output terminals of Time-sharing control unit connect the control pole of 1 conducting control element respectively, the conducting negative pole of 3 conducting control elements connects the anode of Tricolor LED, and the second output terminal of 3 tunnel rectification drive unit connects the negative electrode of Tricolor LED.
2. a kind of electrified detection circuit being applicable to three-phase voltage system as claimed in claim 1, is characterized in that, described Time-sharing control unit also comprises clock circuit, frequency-halving circuit, the first not gate, the second not gate, first and door, second and door and the 3rd and door;
The output terminal of described clock circuit connects the input end of frequency-halving circuit, the output terminal of clock circuit also connect simultaneously first with the second input end of door, the input end of the second not gate and the 3rd with the second input end of door, the output terminal of frequency-halving circuit connect simultaneously the input end of the first not gate, second with the first input end of door and the 3rd and the first input end of door;
First the first output terminal being connected Time-sharing control unit with the output terminal of door, the second the second output terminal being connected Time-sharing control unit with the output terminal of door, the 3rd the 3rd output terminal being connected Time-sharing control unit with the output terminal of door.
3. a kind of electrified detection circuit being applicable to three-phase voltage system as claimed in claim 2, it is characterized in that, described frequency-halving circuit also comprises d type flip flop;
The CIK end of described d type flip flop connects the input end of frequency-halving circuit, the D end of d type flip flop connect d type flip flop /Q end, the Q end of d type flip flop connects the output terminal of frequency-halving circuit.
4. a kind of electrified detection circuit being applicable to three-phase voltage system as claimed in claim 1, it is characterized in that, described conducting control element is triode or field effect transistor;
The base stage of described triode is the control pole of conducting control element, the conducting positive pole of the current collection of triode very conducting control element, the conducting negative pole of the transmitting of triode very conducting control element;
The grid of described field effect transistor is the control pole of conducting control element, and the drain electrode of field effect transistor is the conducting positive pole of conducting control element, and the source electrode of field effect transistor is the conducting negative pole of conducting control element.
5. a kind of electrified detection circuit being applicable to three-phase voltage system as claimed in claim 1, it is characterized in that, described Tricolor LED is common cathode polar form Tricolor LED or common anode polar form Tricolor LED.
6. a kind of electrified detection circuit being applicable to three-phase voltage system as claimed in claim 1, it is characterized in that, described rectification drive unit also comprises diode D1, diode D2, diode D3, diode D4, electric capacity C1, driving circuit, first input end and the second input end;
Described driving circuit comprises first input end, the second input end, the first output terminal and the second output terminal;
The anode of described diode D1 connects the negative electrode of diode D2, the negative electrode of diode D1 connects the negative electrode of diode D4 and the first end of electric capacity C2 simultaneously, the anode of diode D2 connects the anode of diode D3 and second end of electric capacity C2 simultaneously, and the negative electrode of diode D3 connects the anode of diode D4;
The anode of described diode D1 connects the first input end of rectification drive unit simultaneously, the anode of diode D4 connects the second input end of rectification drive unit simultaneously, the first end of electric capacity C2 connects the first input end of driving circuit simultaneously, second end of electric capacity C2 connects the second input end of driving circuit simultaneously, first output terminal of driving circuit connects the first output terminal of rectification drive unit, and the second output terminal of driving circuit connects the second output terminal of rectification drive unit.
7. a kind of electrified detection circuit being applicable to three-phase voltage system as claimed in claim 6, it is characterized in that, described driving circuit also comprises stabilivolt DZ1, diode D5, unidirectional thyristor SCR1 and resistance R1;
The negative electrode of described stabilivolt DZ1 connects first input end and the unidirectional thyristor SCR1 anode of driving circuit simultaneously, the anode of stabilivolt DZ1 connects the anode of diode D5, the negative electrode of diode D5 connects the gate pole of unidirectional thyristor SCR1, the first end of the negative electrode contact resistance R1 of unidirectional thyristor SCR1, second end of resistance R1 connects the first output terminal of driving circuit, and the second input end of driving circuit connects the second output terminal of driving circuit.
8. a kind of electrified detection circuit being applicable to three-phase voltage system as claimed in claim 6, it is characterized in that, described Tricolor LED is common cathode polar form Tricolor LED, common cathode polar form Tricolor LED comprises 3 anodes and 1 common cathode, the conducting negative pole of 3 conducting control elements connects three anodes of common cathode polar form Tricolor LED respectively, and the second output terminal of 3 tunnel rectification drive unit connects the common cathode of common cathode polar form Tricolor LED simultaneously;
Or, described Tricolor LED is common anode polar form Tricolor LED, common anode polar form Tricolor LED comprises 1 common anode pole and 3 negative electrodes, the conducting negative pole of 3 conducting control elements connects the common anode pole of common anode polar form Tricolor LED simultaneously, and the second output terminal of 3 tunnel rectification drive unit connects three negative electrodes of common anode polar form Tricolor LED respectively.
9. a kind of electrified detection circuit being applicable to three-phase voltage system as claimed in claim 6, it is characterized in that, described A phase sensing unit is made up of the first induction pole plate GB1 and the 4th induction pole plate GB4, first induction pole plate GB1 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit;
Described B phase sensing unit is made up of the second induction pole plate GB2 and the 4th induction pole plate GB4, and the second induction pole plate GB2 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit;
Described C phase sensing unit is made up of the 3rd induction pole plate GB3 and the 4th induction pole plate GB4, and the 3rd induction pole plate GB3 connects the first input end of corresponding rectification drive unit, and the 4th induction pole plate GB4 connects the second input end of corresponding rectification drive unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510062561.9A CN104698259A (en) | 2015-02-06 | 2015-02-06 | Electrified detection circuit suitable for three-phase electrical system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510062561.9A CN104698259A (en) | 2015-02-06 | 2015-02-06 | Electrified detection circuit suitable for three-phase electrical system |
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| CN104698259A true CN104698259A (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510062561.9A Pending CN104698259A (en) | 2015-02-06 | 2015-02-06 | Electrified detection circuit suitable for three-phase electrical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525959A (en) * | 2017-08-23 | 2017-12-29 | 海南电网有限责任公司琼海供电局 | Electrification detection system |
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