CN113518492A

CN113518492A - Low-cost high stability projecting lamp special for generator

Info

Publication number: CN113518492A
Application number: CN202110446828.XA
Authority: CN
Inventors: 张树军
Original assignee: Lu'an Guoneng Photoelectric Lighting Co ltd
Current assignee: Lu'an Guoneng Photoelectric Lighting Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-10-19

Abstract

The invention provides a low-cost high-stability special projection lamp for a generator, belongs to the technical field of lighting equipment, and is used for solving the technical problem that the existing common lighting equipment is easy to break down when being directly powered by the generator. The invention comprises an anti-surge circuit, a non-isolated LED power supply circuit and an LED light source, wherein the input end of the anti-surge circuit is connected with the output end of a generator, the input end of the non-isolated LED power supply circuit is connected with the output end of the anti-surge circuit, the output end of the isolated LED power supply circuit is connected with the LED light source, and the non-isolated LED power supply circuit consists of a plurality of groups of IC power supply circuits which are connected in parallel. After the generator generates electricity, the generator is absorbed by the anti-surge circuit, can thoroughly resist the influence of instantaneous voltage of thousands of volts on the LED lamp beads, has good protectiveness, is matched with the anti-surge circuit by the non-isolation circuit, has good stability, low cost and long service life, and is suitable for being used in places such as a ship or a construction site where the generator directly supplies power.

Description

Low-cost high stability projecting lamp special for generator

Technical Field

The invention belongs to the technical field of lighting equipment, relates to a projection lamp, and particularly relates to a low-cost high-stability projection lamp special for a generator.

Background

LED light fixtures installed on ships typically experience the following disturbances: at present, domestic situations show that power supply equipment used on a common ship is a gasoline or diesel generator, the voltage generated by the power supply equipment is extremely unstable, the voltage fluctuation of the power supply equipment is as low as about 100V and as high as about 400V according to a generator outputting 220V alternating current, the instantaneous surge is higher and can be about 5KV, the high instantaneous surge voltage is obtained, and the common 220V lighting equipment of the commercial power is directly used in the voltage range with large fluctuation and basically has faults.

Two problems can occur with existing lighting devices:

1. because the voltage generated by the generator is extremely unstable, 220V conventional products on the market are very easy to burn out, and the LED lamp beads used by people are generally 3V or 6V, the withstand voltage of a conventional aluminum substrate is 1KV-1.5KV, and when the conventional aluminum substrate meets the 5KV instantaneous voltage, the aluminum substrate is instantaneously broken down, so that great economic loss is caused to users and manufacturers.

2. By adopting the technical scheme of isolating the wide voltage, the problem of surge resistance can be solved, and the aluminum substrate is prevented from being broken down, but two problems exist, one is that the isolation temperature is high, the isolation temperature is placed in a completely closed projection lamp, the high temperature resistance of an IC (integrated circuit) of a power supply is limited, the service life of the whole lamp is not facilitated, and the condition of frequent lamp death can also occur; meanwhile, the cost of isolation is more than three times higher than that of non-isolation, so the total cost of a high-power projection lamp is much higher, the cost performance is not high, and the popularization of the market is not facilitated.

Therefore, it is necessary to design a low-cost high-stability projector dedicated for the generator, so as to improve the stability of the projector and reduce the production cost through a non-isolation and anti-surge scheme.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a special low-cost high-stability projection lamp for a generator, which aims to solve the technical problems that: how to design a special project lamp which is suitable for the direct use of a generator, has low cost and high stability.

The purpose of the invention can be realized by the following technical scheme:

a low-cost high-stability special project lamp for a generator comprises an anti-surge circuit, a non-isolated LED power supply circuit and an LED light source, wherein the input end of the anti-surge circuit is connected with the output end of the generator; the anti-surge circuit comprises thermistors NTC1 and NTC2, piezoresistors RV1 and RV2, a common-mode inductor L1, an I-shaped inductor L2, safety capacitors X1 and X2 and a resistor R1; the anti-surge circuit further comprises a rectifying circuit, wherein the rectifying circuit comprises a rectifying bridge D1, a safety capacitor X3 and a safety capacitor X4, a thermistor NTC3 and a piezoresistor RV 3; in the anti-surge circuit, at the output end of an engine (the circuit is divided into N and L lines according to the zero line), before a rectifier bridge D1, a zero line N is connected with a thermistor NTC1 in series, then the zero line N and a live line L are connected with a piezoresistor RV1, a resistor R1, a safety capacitor X1 and a common mode inductor L1 in parallel in sequence, then the thermistor NTC2 is connected with the live line L in series, the safety capacitor X2 is connected between the zero line N and the live line L in parallel, an I-shaped inductor L2 is connected with the zero line N in series, and then the zero line N and the live line L are connected with a piezoresistor RV2 in parallel; the rectifying circuit is connected with a rectifying bridge D1 through a zero line N and a live line L which are processed by an anti-surge circuit, alternating current is converted into direct current through the rectifying bridge D1, a thermistor NTC3 is connected in series with the positive pole of the rectifying bridge D1, a safety capacitor X3, a voltage dependent resistor RV3 and a safety capacitor X4 are sequentially connected in parallel between the positive pole and the negative pole, and the positive and negative levels of the rectifying circuit are respectively connected with the positive and negative levels of the non-isolated LED power supply circuit.

The non-isolated LED power supply circuit is composed of a plurality of groups of IC power supply circuits connected in parallel, the number of the IC power supply circuits is set according to the power of the projection lamp, and the single group of IC power supply circuits comprises a non-isolated LED driving chip (IC) U1, resistors R2, R3, R4, R5, a piezoresistor RV4, diodes D2 and D3, a safety capacitor X5, a polar capacitor X6 and an inductor L3; in the single-group IC power supply circuit, the positive and negative poles of the input end of the circuit are firstly connected with a capacitor safety-regulation capacitor X5 in parallel, the No. 1 pin, the No. 2 pin and the No. 7 pin of a non-isolated LED driving chip U1 are connected with a resistor R2 and a resistor R3 in parallel and then connected with the negative pole of a power supply, the No. 4 pin is connected with the positive pole of the power supply in series after being connected with a resistor R4 in series, the No. 5 pin and the No. 6 pin are connected with a series inductor L3, then the No. 5 pin and the No. 6 pin are connected with a diode D2 in series, a resistor R5 and a polarity capacitor X6 in parallel respectively, the inductor L3 is positioned between a diode D2 and a resistor R5, the negative pole of the diode D2 points to the positive pole of the power supply, the positive pole of the polarity capacitor X6 points to the positive pole of the power supply, the negative pole of the input end of the circuit is connected with a piezoresistor RV4 in series and then connected with a diode D3, the negative pole of the D3 points to the negative pole of the input end of the circuit, and the positive and negative pole of the output end of the IC power supply circuit are connected with an LED light source.

Preferably, the non-isolated LED power supply circuit consists of four sets of IC power supply circuits connected in parallel.

Because the power of the projection lamp is larger, when the power of the projection lamp is 100W, the non-isolated LED power supply circuit consists of four groups of IC power supply circuits which are connected in parallel, and each group is 25W.

The anti-surge circuit is integrated on a circuit board, the non-isolated LED power supply circuit and the LED light source are integrated on an aluminum substrate, the LED light source adopts LED surface mounted lamp beads, and the non-isolated LED driving chip is a surface mounted IC.

The non-isolated LED driving chip is a BP2866 type non-isolated step-down LED driving chip, a 600V-withstand MOS (metal oxide semiconductor) tube is arranged in the chip, the chip can work in a voltage range of 0-400V, and meanwhile, the chip has high power performance, and the PF (power factor) value is greatly improved; the chip is applied to the non-isolated LED power supply circuit, is favorable for large-area use of the projection lamp in large-scale commercial ships and construction sites with zero power consumption, reduces interference to a power grid, saves cost for wiring and saves not little expenditure.

Compared with the prior art, this special projecting lamp of low-cost high stability generator has following advantage:

1. through the cooperation of the anti-surge circuit and the non-isolated LED power supply circuit, before the power is supplied to the aluminum substrate module, the anti-surge circuit can thoroughly resist the influence of instantaneous voltage of thousands of volts on the LED lamp beads, has good absorption effect, prevents the aluminum substrate and the LED lamp beads from being burnt out, has good protectiveness, provides guarantee for the high stability of the whole lamp, and is suitable for being used by a circuit directly supplied with power by a generator; to high-power projecting lamp, adopt non-isolation and anti surge power supply scheme, the cost of manufacture is lower, and stability is good, and is not fragile, easily installs, is favorable to using by a large scale at the building site of large-scale merchant ship, zero hour power consumption, reduces the interference to the electric wire netting, has very high price/performance ratio, is favorable to marketing.

2. The temperature is lower during the use of this projecting lamp, puts and uses under complete inclosed environment can not exert an influence to lamps and lanterns life-span, has good lightning protection anti-interference performance simultaneously, can not receive the interference of generator power supply, can not cause secondary interference to other equipment yet, and the suitability is strong.

Drawings

FIG. 1 is a circuit schematic of a non-isolated LED power supply circuit of the present invention;

FIG. 2 is a circuit schematic of a single set of IC power supply circuits in a non-isolated LED power supply circuit;

FIG. 3 is a circuit schematic of an anti-surge circuit of the present invention;

fig. 4 is a schematic view of the connection structure of the present invention.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

Referring to fig. 1-4, the present embodiment provides a low-cost high-stability projector dedicated for a generator, including an anti-surge circuit, a non-isolated LED power supply circuit, and an LED light source, where an input end of the anti-surge circuit is connected to an output end of the generator, an input end of the non-isolated LED power supply circuit is connected to an output end of the anti-surge circuit, and an output end of the isolated LED power supply circuit is connected to the LED light source; the anti-surge circuit comprises thermistors NTC1 and NTC2, piezoresistors RV1 and RV2, a common-mode inductor L1, an I-shaped inductor L2, safety capacitors X1 and X2 and a resistor R1; the anti-surge circuit further comprises a rectifying circuit, wherein the rectifying circuit comprises a rectifying bridge D1, a safety capacitor X3 and a safety capacitor X4, a thermistor NTC3 and a piezoresistor RV 3; in the anti-surge circuit, at the output end of an engine (the circuit is divided into N and L lines according to the zero line), before a rectifier bridge D1, a zero line N is connected with a thermistor NTC1 in series, then the zero line N and a live line L are connected with a piezoresistor RV1, a resistor R1, a safety capacitor X1 and a common mode inductor L1 in parallel in sequence, then the thermistor NTC2 is connected with the live line L in series, the safety capacitor X2 is connected between the zero line N and the live line L in parallel, an I-shaped inductor L2 is connected with the zero line N in series, and then the zero line N and the live line L are connected with a piezoresistor RV2 in parallel; the rectifying circuit is connected with a rectifying bridge D1 through a zero line N and a live line L which are processed by an anti-surge circuit, alternating current is converted into direct current through the rectifying bridge D1, a thermistor NTC3 is connected in series with the positive pole of the rectifying bridge D1, a safety capacitor X3, a voltage dependent resistor RV3 and a safety capacitor X4 are sequentially connected in parallel between the positive pole and the negative pole, and the positive and negative levels of the rectifying circuit are respectively connected with the positive and negative levels of the non-isolated LED power supply circuit.

The single group of IC power supply circuits comprise a non-isolated LED driving chip (IC) U1, resistors R2, R3, R4, R5, a piezoresistor RV4, diodes D2 and D3, a safety capacitor X5, a polar capacitor X6 and an inductor L3; in the single-group IC power supply circuit, the positive and negative poles of the input end of the circuit are firstly connected with a capacitor safety-regulation capacitor X5 in parallel, the No. 1 pin, the No. 2 pin and the No. 7 pin of a non-isolated LED driving chip U1 are connected with a resistor R2 and a resistor R3 in parallel and then connected with the negative pole of a power supply, the No. 4 pin is connected with the positive pole of the power supply in series after being connected with a resistor R4 in series, the No. 5 pin and the No. 6 pin are connected with a series inductor L3, then the No. 5 pin and the No. 6 pin are connected with a diode D2 in series, a resistor R5 and a polarity capacitor X6 in parallel respectively, the inductor L3 is positioned between a diode D2 and a resistor R5, the negative pole of the diode D2 points to the positive pole of the power supply, the positive pole of the polarity capacitor X6 points to the positive pole of the power supply, the negative pole of the input end of the circuit is connected with a piezoresistor RV4 in series and then connected with a diode D3, the negative pole of the D3 points to the negative pole of the input end of the circuit, and the positive and negative pole of the output end of the IC power supply circuit are connected with an LED light source.

Preferably, in this embodiment, the non-isolated LED power supply circuit is composed of four sets of IC power supply circuits connected in parallel.

The anti-surge circuit is integrated on a circuit board, the non-isolated LED power supply circuit and the LED light source are integrated on an aluminum substrate, the LED light source adopts LED patch lamp beads, and the non-isolated LED driving chip is a patch IC.

In this embodiment, preferably, the non-isolated LED driving chip is a BP2866 type non-isolated step-down LED driving chip, and a 600V withstand voltage MOS transistor is built in the chip, so that the chip can operate in a voltage range of 0-400V, and has high power performance, thereby greatly improving a PF value (power factor); the chip is applied to the non-isolated LED power supply circuit, is favorable for large-area use of the projection lamp in large-scale commercial ships and construction sites with zero power consumption, reduces interference to a power grid, saves cost for wiring and saves not little expenditure.

The working principle of the invention is as follows:

the invention provides a low-cost high-stability special projection lamp for a generator, which is characterized in that an anti-surge circuit is matched with a non-isolated LED power supply circuit, before an aluminum substrate module is powered, the anti-surge circuit can thoroughly resist the influence of instantaneous voltage of thousands of volts on LED lamp beads, has a good absorption effect, prevents the aluminum substrate and the LED lamp beads from being burnt out, has good protectiveness, provides guarantee for the high stability of the whole lamp, and is suitable for being used by a circuit directly powered by the generator; for a high-power projection lamp, a non-isolated LED power supply circuit is matched with an anti-surge circuit, so that the high-power projection lamp is low in cost, good in stability, not easy to damage and easy to install, is favorable for large-area use in large-scale commercial ships and construction sites with zero-hour power consumption, reduces interference on a power grid, has high cost performance and is favorable for market popularization; the temperature of the projection lamp is low when the projection lamp is used, the service life of the lamp cannot be influenced when the projection lamp is used in a completely closed environment, the projection lamp has good lightning protection and anti-interference performance, cannot be interfered by power supply of a generator, cannot cause secondary interference to other equipment, and has strong applicability; the special projection lamp for the generator has the advantages of low cost, high stability, convenience for use in places such as ships or construction sites and the like.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. A low-cost high-stability special project lamp for a generator comprises an anti-surge circuit, a non-isolated LED power supply circuit and an LED light source, and is characterized in that the input end of the anti-surge circuit is connected with the output end of the generator, the input end of the non-isolated LED power supply circuit is connected with the output end of the anti-surge circuit, and the output end of the isolated LED power supply circuit is connected with the LED light source; the anti-surge circuit comprises thermistors (NTC1) and (NTC2), piezoresistors (RV1) and (RV2), a common-mode inductor (L1), an I-shaped inductor (L2), safety capacitors (X1) and (X2) and a resistor (R1); the anti-surge circuit further comprises a rectifying circuit, wherein the rectifying circuit comprises a rectifying bridge (D1), safety capacitors (X3) and (X4), a thermistor (NTC3) and a piezoresistor (RV 3); in the anti-surge circuit, at the output end of an engine, before a rectifier bridge (D1), a zero line (N) is connected with a thermistor (NTC1) in series, then the zero line (N) and a live line (L) are connected with a piezoresistor (RV1), a resistor (R1), a safety capacitor (X1) and a common mode inductor (L1) in parallel in sequence, then the thermistor (NTC2) is connected with the live line (L) in series, the safety capacitor (X2) is connected between the zero line (N) and the live line (L) in parallel, an I-shaped inductor (L2) is connected with the zero line (N) in series, and then the piezoresistor (RV2) is connected with the zero line (N) and the live line (L) in parallel; the rectifying circuit is connected with a rectifying bridge (D1) by using a zero line (N) and a live line (L) which are processed by an anti-surge circuit, alternating current is converted into direct current through the rectifying bridge (D1), a thermistor (NTC3) is connected in series with the positive pole of the rectifying bridge (D1), a safety capacitor (X3), a piezoresistor (RV3) and a safety capacitor (X4) are sequentially connected in parallel between the positive pole and the negative pole, and the positive pole and the negative pole of the rectifying circuit are respectively connected with the positive stage and the negative stage of the non-isolated LED power supply circuit.

2. The projector lamp special for the low-cost high-stability generator of claim 1, wherein the non-isolated LED power supply circuit is composed of a plurality of sets of parallel IC power supply circuits, the number of the IC power supply circuits is set according to the power of the projector lamp, the single set of IC power supply circuits includes a non-isolated LED driving chip (U1), resistors (R2), (R3), (R4) and (R5), a voltage dependent resistor (RV4), diodes (D2) and (D3), a safety capacitor (X5), a polar capacitor (X6) and an inductor (L3); in the single-group IC power supply circuit, the positive electrode and the negative electrode of the input end of the circuit are firstly connected with a capacitor safety-regulation capacitor (X5) in parallel, the No. 1 pin, the No. 2 pin and the No. 7 pin of a non-isolated LED driving chip (U1) are connected with a resistor (R2) and a resistor (R3) in parallel and then connected with the negative electrode of a power supply, the No. 4 pin is connected with a resistor (R4) in series and then connected with the positive electrode of the power supply, the No. 5 pin and the No. 6 pin are connected with an inductor (L3) in series and then connected with a diode (D2), the resistor (R5) and a polar capacitor (X6) in parallel, the inductor (L3) is positioned between the diode (D2) and the resistor (R5), wherein the cathode of the diode (D2) points to the anode of the power supply, the anode of the polar capacitor (X6) points to the anode of the power supply, the cathode of the circuit input end is connected with the piezoresistor (RV4) in series and then connected with the diode (D3) in series, the cathode of the diode (D3) points to the cathode of the circuit input end, and the anode and the cathode of the IC power supply circuit output end are the anode and the cathode connected with the LED light source.

3. The projector lamp special for the low-cost high-stability generator as claimed in claim 2, wherein the non-isolated LED power supply circuit is composed of four sets of parallel IC power supply circuits.

4. The projector lamp special for the low-cost high-stability generator of claim 3, wherein the power of the projector lamp is 100W, and the non-isolated LED power supply circuit is composed of four groups of parallel IC power supply circuits, each group is 25W.

5. The low-cost high-stability projector special for the generator as claimed in claim 2 or 3, wherein the anti-surge circuit is integrated on a circuit board, the non-isolated LED power supply circuit and the LED light source are integrated on an aluminum substrate, the LED light source adopts LED patch lamp beads, and the non-isolated LED driving chip is a patch IC.

6. The projector lamp special for the low-cost high-stability generator as claimed in claim 4, wherein the non-isolated LED driving chip is a BP2866 type non-isolated step-down LED driving chip.