CN202533484U - Direct current voltage detection module for passive photovoltaic cell - Google Patents
Direct current voltage detection module for passive photovoltaic cell Download PDFInfo
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- CN202533484U CN202533484U CN 201220004575 CN201220004575U CN202533484U CN 202533484 U CN202533484 U CN 202533484U CN 201220004575 CN201220004575 CN 201220004575 CN 201220004575 U CN201220004575 U CN 201220004575U CN 202533484 U CN202533484 U CN 202533484U
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Abstract
The utility model relate to a direct current voltage detection module for a passive photovoltaic cell, and the module comprises a resistance potential-dividing measuring circuit, a high voltage MOS pipe circuit, a voltage reference circuit, a switch output circuit, indicating light circuits and a peak over voltage protection circuit, wherein a fixed working point is supplied to the high voltage MOS pipe circuit through joint action of the resistance potential-dividing measuring circuit and the voltage reference circuit, and the high voltage MOS pipe circuit works in a fixed enlarged zone; working currents are supplied to the switch output circuit through the high voltage MOS pipe circuit and the voltage reference circuit, the indicating light circuits are two circuits that are respectively connected in series in the resistance potential-dividing measuring circuit and the switch output circuit, and the two circuits respectively indicates whether the direct current voltage is forward and whether the amplitude value reaches the preset threshold value; and the peak over voltage protection circuit is connected with an input port of the whole detection module to absorb the over voltage peak, and therefore the whole detection module can be protected. The direct current voltage detection module is advantaged by precise measurement, low self power consumption, small size, control over the power supply without external assistance, and adjustable voltage threshold value.
Description
Technical field
The utility model relates to a kind of DC voltage detection module, especially relates to a kind of passive photovoltaic cell DC voltage detection module.
Background technology
In existing photovoltaic system; Particularly in some powerful photovoltaic DC-to-AC converters; Need a kind of photovoltaic cell component dc voltage detecting device; The effect of this device is to detect switching on and shutting down or the start and stop etc. that the DC voltage of photovoltaic cell component is controlled photovoltaic DC-to-AC converter, with the automatic control that reaches photovoltaic apparatus and the purpose of energy savings.
The general pattern that adopts active detection of the detection of more early stage photovoltaic cell component DC voltage; Be that pick-up unit needs extra accessory power supply to cooperate; Just can detect, this just brings several problems: the one, and device needs extra accessory power supply, has increased the complicacy of device; The 2nd, the loss of device itself is bigger, even under the situation that photovoltaic module operates in unglazed (like night), device also need be from power consumption.In order to address these problems; Developed a kind of passive pick-up unit; Promptly need not the cooperation of extra accessory power supply; Also can directly detect the DC voltage state, and dc voltage value be 0 or lower situation under (as: photovoltaic cell component is under unglazed situation), pick-up unit itself be 0 from power consumption.
Summary of the invention
The utility model mainly is to solve the existing in prior technology technical matters; Provide that a kind of circuit is simple, reliability is high, very low during work from power consumption, approach 0 from power consumption during holding state, and have volume a kind of passive photovoltaic cell DC voltage detection module little, in light weight, easy for installation.
The above-mentioned technical matters of the utility model mainly is able to solve through following technical proposals:
A kind of passive photovoltaic cell DC voltage detection module comprises electric resistance partial pressure metering circuit, high-voltage MOS pipe circuit, voltage reference circuit, switch output circuit, indicator light circuit and spike excess voltage protection; Said electric resistance partial pressure metering circuit and voltage reference circuit acting in conjunction provide a fixing working point for the high-voltage MOS pipe circuit, make it be operated in a fixing amplification region; Through high-voltage MOS pipe circuit and voltage reference circuit; Working current is provided for the switch output circuit; Indicator light circuit is a two-wheeled, is serially connected in respectively in electric resistance partial pressure metering circuit and the switch output circuit, indicates respectively whether DC voltage is the threshold values whether forward and amplitude reach setting; The spike excess voltage protection is connected on the input port of whole detection module, act as to absorb the superpotential spike, to protect whole detection module.
At above-mentioned a kind of passive photovoltaic cell DC voltage detection module, said electric resistance partial pressure metering circuit comprises resistance R 1, variable resistor VR1 and the resistance R 2 of series connection successively.
At above-mentioned a kind of passive photovoltaic cell DC voltage detection module; Said high-voltage MOS pipe circuit comprises the high-voltage MOS pipe Q1 that source electrode is connected with DC+; The grid of high-voltage MOS pipe Q1 also is connected with the negative electrode of voltage stabilizing diode Z1 through resistance R 3, and the anode of voltage stabilizing diode Z1 is connected with indicator light circuit.
At above-mentioned a kind of passive photovoltaic cell DC voltage detection module, said voltage reference circuit comprises the adjustable accurate shunt regulator T1 that base stage is connected with resistance R 1; The base stage of adjustable accurate shunt regulator T1 is connected with indicator light circuit with resistance R 2 through variable resistor VR1, and the base stage of adjustable accurate shunt regulator T1 also is connected with indicator light circuit through capacitor C 3.
At above-mentioned a kind of passive photovoltaic cell DC voltage detection module; Said switch output circuit comprises a relay K 1 and the diode D2 that negative electrode is connected with the pin 1 of relay K 1; The anode of diode D2 is connected with the pin of relay K 1, and the anode of diode D2 also is connected with indicator light circuit.
At above-mentioned a kind of passive photovoltaic cell DC voltage detection module, indicator light circuit comprises two-way, and the first via comprises the LED 2 that is parallel with a resistance R 4, and the anode of above-mentioned diode D2 is connected with the anode of LED 2; The negative electrode of LED 2 connects the collection utmost point above-mentioned and adjustable accurate shunt regulator T1 and is connected; The second the tunnel comprises LED 1 and diode D1, and the grid of above-mentioned resistance R 1 one ends and high-voltage MOS pipe Q1 is connected with LED 1 negative electrode simultaneously, and the LED1 anode is connected with DC+; The base stage of above-mentioned adjustable accurate shunt regulator T1 is connected with the anode of resistance R 2 with diode D1 through the variable resistor VR1 that connects successively; The negative electrode of diode D1 is connected with DC-.
At above-mentioned a kind of passive photovoltaic cell DC voltage detection module, said spike excess voltage protection comprises capacitor C 1 and capacitor C 2, and capacitor C 1 one ends are connected with DC+, and the other end is connected with DC-; Capacitor C 2 one ends are connected with DC+, and the other end is connected with the anode of diode D1.
Therefore, the utlity model has following advantage: 1. circuit is simple, reliability is high, and is very low from power consumption during work, approaches 0 from power consumption during holding state; 2. volume is little, in light weight, easy for installation.
Description of drawings
Fig. 1 is the contour structures synoptic diagram of the utility model passive light photovoltaic cell components DC voltage detection module;
Fig. 2 is the circuit theory diagrams of the utility model passive light photovoltaic cell components DC voltage detection module.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technical scheme of the utility model.
Embodiment:
A kind of passive photovoltaic cell DC voltage detection module comprises electric resistance partial pressure metering circuit (1), high-voltage MOS pipe circuit 2, voltage reference circuit 3, switch output circuit 4, indicator light circuit 5 and spike excess voltage protection 6; Said electric resistance partial pressure metering circuit 1 and voltage reference circuit 3 actings in conjunction provide a fixing working point for high-voltage MOS pipe circuit 2, make it be operated in a fixing amplification region; Through high-voltage MOS pipe circuit 2 and voltage reference circuit 3; Working current is provided for switch output circuit 4; Indicator light circuit 5 is a two-wheeled, is serially connected in respectively in electric resistance partial pressure metering circuit 1 and the switch output circuit 4, indicates respectively whether DC voltage is the threshold values whether forward and amplitude reach setting; Spike excess voltage protection 6 is connected on the input port of whole detection module, act as to absorb the superpotential spike, to protect whole detection module.
Electric resistance partial pressure metering circuit 1 comprises resistance R 1, variable resistor VR1 and the resistance R 2 of series connection successively; High-voltage MOS pipe circuit 2 comprises the high-voltage MOS pipe Q1 that source electrode is connected with DC+, and the grid of high-voltage MOS pipe Q1 also is connected with the negative electrode of voltage stabilizing diode Z1 through resistance R 3, and the anode of voltage stabilizing diode Z1 is connected with indicator light circuit 5; Voltage reference circuit 3 comprises the adjustable accurate shunt regulator T1 that base stage is connected with resistance R 1; The base stage of adjustable accurate shunt regulator T1 is connected with indicator light circuit 5 with resistance R 2 through variable resistor VR1, and the base stage of adjustable accurate shunt regulator T1 also is connected with indicator light circuit 5 through capacitor C 3; Switch output circuit 4 comprises a relay K 1 and the diode D2 that negative electrode is connected with the pin 1 of relay K 1, and the anode of diode D2 is connected with the pin of relay K 1, and the anode of diode D2 also is connected with indicator light circuit 5; Indicator light circuit 5 comprises two-way, and the first via comprises the LED 2 that is parallel with a resistance R 4, and the anode of above-mentioned diode D2 is connected with the anode of LED 2; The negative electrode of LED 2 connects the collection utmost point above-mentioned and adjustable accurate shunt regulator T1 and is connected; The second the tunnel comprises LED 1 and diode D1, and the grid of above-mentioned resistance R 1 one ends and high-voltage MOS pipe Q1 is connected with LED 1 negative electrode simultaneously, and the LED1 anode is connected with DC+; The base stage of above-mentioned adjustable accurate shunt regulator T1 is connected with the anode of resistance R 2 with diode D1 through the variable resistor VR1 that connects successively; The negative electrode of diode D1 is connected with DC-; Spike excess voltage protection 6 comprises capacitor C 1 and capacitor C 2, and capacitor C 1 one ends are connected with DC+, and the other end is connected with DC-; Capacitor C 2 one ends are connected with DC+, and the other end is connected with the anode of diode D1.
During work; Photovoltaic cell component DC voltage to be detected gets into electric resistance partial pressure metering circuit 1 through connection terminal P1 and carries out dividing potential drop; With voltage reference circuit 3 actings in conjunction; Penetrate source electrode ce electrode current size through what regulate adjustable accurate shunt regulator T1 internal transistor, a fixing working point is provided for high-voltage MOS pipe circuit 2, make it be operated in a fixing amplification region; And this working point is to change through adjustable potentiometer VR1 and resistance R 2, to be fit to the detection of different DC voltage threshold values; Through high-voltage MOS pipe circuit 2 and voltage reference circuit 3; Suitable working current is provided for the relay coil of switch output circuit 4; Make relay be operated in a fixing switch working state; When the amplitude of the photovoltaic cell component DC voltage of importing was lower than the threshold values of setting, relay was failure to actuate, and the switch contact of relay is operated in original position; When the amplitude of photovoltaic cell component DC voltage of input reaches or be higher than in the threshold values set, the actuating of relay, the switch contact of relay is operated in operating state.The state of the switch contact of relay has reflected promptly whether the amplitude of photovoltaic cell component DC voltage reaches the threshold values of setting, thereby reaches the purpose of control.This detection module makes module have the anti-counter-function of DC voltage through counnter attack diode D1 is set, and when the DC voltage error-polarity connection, this device output switching signal amount keeps original position.
Two-way indicator light circuit 5 is serially connected in respectively in electric resistance partial pressure metering circuit 1 and the switch output circuit 4, indicates respectively whether DC voltage is the threshold values whether forward and amplitude reach setting; Spike excess voltage protection 6 is connected on the input port of whole detection module, act as to absorb the spike superpotential, to protect whole detection module.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Claims (7)
1. passive photovoltaic cell DC voltage detection module; It is characterized in that, comprise electric resistance partial pressure metering circuit (1), high-voltage MOS pipe circuit (2), voltage reference circuit (3), switch output circuit (4), indicator light circuit (5) and spike excess voltage protection (6); Said electric resistance partial pressure metering circuit (1) and voltage reference circuit (3) acting in conjunction provide a fixing working point for high-voltage MOS pipe circuit (2), make it be operated in a fixing amplification region; Through high-voltage MOS pipe circuit (2) and voltage reference circuit (3); Working current is provided for switch output circuit (4); Indicator light circuit (5) is a two-wheeled; Be serially connected in respectively in electric resistance partial pressure metering circuit (1) and the switch output circuit (4), indicate respectively whether DC voltage is the threshold values whether forward and amplitude reach setting; Spike excess voltage protection (6) is connected on the input port of whole detection module, act as to absorb the superpotential spike, to protect whole detection module.
2. a kind of passive photovoltaic cell DC voltage detection module according to claim 1 is characterized in that, said electric resistance partial pressure metering circuit (1) comprises resistance R 1, variable resistor VR1 and the resistance R 2 of series connection successively.
3. a kind of passive photovoltaic cell DC voltage detection module according to claim 1; It is characterized in that; Said high-voltage MOS pipe circuit (2) comprises the high-voltage MOS pipe Q1 that source electrode is connected with DC+; The grid of high-voltage MOS pipe Q1 also is connected with the negative electrode of voltage stabilizing diode Z1 through resistance R 3, and the anode of voltage stabilizing diode Z1 is connected with indicator light circuit (5).
4. a kind of passive photovoltaic cell DC voltage detection module according to claim 3 is characterized in that said voltage reference circuit (3) comprises the adjustable accurate shunt regulator T1 that base stage is connected with resistance R 1; The base stage of adjustable accurate shunt regulator T1 is connected with indicator light circuit (5) with resistance R 2 through variable resistor VR1, and the base stage of adjustable accurate shunt regulator T1 also is connected with indicator light circuit (5) through capacitor C 3.
5. a kind of passive photovoltaic cell DC voltage detection module according to claim 4; It is characterized in that; Said switch output circuit (4) comprises a relay K 1 and the diode D2 that negative electrode is connected with the pin 1 of relay K 1; The anode of diode D2 is connected with the pin of relay K 1, and the anode of diode D2 also is connected with indicator light circuit (5).
6. a kind of passive photovoltaic cell DC voltage detection module according to claim 5; It is characterized in that; Indicator light circuit (5) comprises that two-way, the first via comprise the LED 2 that is parallel with a resistance R 4, and the anode of above-mentioned diode D2 is connected with the anode of LED 2; The negative electrode of LED 2 connects the collection utmost point above-mentioned and adjustable accurate shunt regulator T1 and is connected; The second the tunnel comprises LED 1 and diode D1, and the grid of above-mentioned resistance R 1 one ends and high-voltage MOS pipe Q1 is connected with LED 1 negative electrode simultaneously, and the LED1 anode is connected with DC+; The base stage of above-mentioned adjustable accurate shunt regulator T1 is connected with the anode of resistance R 2 with diode D1 through the variable resistor VR1 that connects successively; The negative electrode of diode D1 is connected with DC-.
7. a kind of passive photovoltaic cell DC voltage detection module according to claim 6 is characterized in that, said spike excess voltage protection (5) comprises capacitor C 1 and capacitor C 2, and capacitor C 1 one ends are connected with DC+, and the other end is connected with DC-; Capacitor C 2 one ends are connected with DC+, and the other end is connected with the anode of diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220004575 CN202533484U (en) | 2012-01-07 | 2012-01-07 | Direct current voltage detection module for passive photovoltaic cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220004575 CN202533484U (en) | 2012-01-07 | 2012-01-07 | Direct current voltage detection module for passive photovoltaic cell |
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| CN202533484U true CN202533484U (en) | 2012-11-14 |
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| CN 201220004575 Expired - Lifetime CN202533484U (en) | 2012-01-07 | 2012-01-07 | Direct current voltage detection module for passive photovoltaic cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383405A (en) * | 2013-07-10 | 2013-11-06 | 珠海许继芝电网自动化有限公司 | Passive signal voltage detection method |
-
2012
- 2012-01-07 CN CN 201220004575 patent/CN202533484U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383405A (en) * | 2013-07-10 | 2013-11-06 | 珠海许继芝电网自动化有限公司 | Passive signal voltage detection method |
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| GR01 | Patent grant | ||
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Granted publication date: 20121114 |