CN212628497U

CN212628497U - LED lamp resistant to high induction voltage of ballast

Info

Publication number: CN212628497U
Application number: CN202021285116.1U
Authority: CN
Inventors: 张争雷; 姚斌雄
Original assignee: Ningbo Klite Electric Manufacture Co Ltd
Current assignee: Ningbo Klite Electric Manufacture Co Ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-02-26
Anticipated expiration: 2030-07-03

Abstract

The utility model provides a LED lamp of resistant ballast high induced voltage, including printing opacity cover, bed frame, emitting diode group, drive circuit, drive plate, drive box and lamp holder, drive circuit includes ballast, rectifier module, current detection module, switch module and switch module drive module, switch module drive module control switch module. The utility model discloses a substantive effect is: the influence of the ballast induction voltage on the LED when the switch is disconnected is limited under the premise of not dismounting the ballast with extremely low cost, and the technical problem that the service life of the LED is shortened due to the high induction voltage of the ballast is solved.

Description

LED lamp resistant to high induction voltage of ballast

Technical Field

The invention relates to the field of LED lamps, in particular to an LED lamp resistant to high induction voltage of a ballast.

Background

The fluorescent lamp is a traditional lighting source and is widely used in places with simple colors but high brightness requirements, such as hotels, offices, shops, hospitals, libraries, families and the like. The ballast is a device which plays a role in current limiting and generating instant high voltage on the fluorescent lamp, and is made by winding enameled wires on an iron core made of silicon steel, and when the coil with the iron core is powered on/off instantly, the coil can generate high voltage by self induction and is added on electrodes at two ends of the fluorescent lamp tube. Most conventional fluorescent lamps must be matched with a ballast to complete the starting process if the fluorescent lamps are used normally, so that lighting circuits in many places are matched with the ballast used with the fluorescent lamps. In recent years, with the continuous development of the LED industry, a new energy-saving LED light source is gradually replacing the traditional fluorescent lighting. However, the LED lamp can be normally started to emit light without the ballast, and when the switch is turned off, the induced voltage of the ballast generates an overvoltage at the two ends of the LED, so that the technical problem of the short service life of the LED due to the high induced voltage of the ballast exists.

In order to solve the technical problem, publication number CN210319474U discloses a LED lamp tube lamp holder, including the lamp holder body, the lamp holder body is located the both ends of fluorescent tube, is equipped with the lamp plate in the fluorescent tube, is equipped with LED lamp pearl on the lamp plate, and the one end of fluorescent tube is equipped with the power, LED lamp pearl with power electric connection, the lamp holder body includes the becket and is located the plastic part of becket one end, the blind end of plastic part runs through and is equipped with the PIN needle. The utility model discloses a through changing the withstand voltage ability that the lamp holder material increases the fluorescent tube, but not solve the technical problem that emitting diode itself shortens under high-induction voltage. The technical problem that the service life of the light-emitting diode is shortened under high induction voltage can be solved by dismantling the ballast, but the original mounting structures such as lamp brackets and the like are possibly damaged in the dismantling process, and time and labor are wasted.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: demolish the ballast and can solve the technical problem that emitting diode itself shortened under high induction voltage, nevertheless demolish the process and probably need destroy mounting structure such as lighting fixture originally, waste time and energy moreover, do not demolish the ballast and then have the technical problem that ballast high induction voltage leads to the LED life-span to shorten. The utility model provides a simple structure, compatible ballast's resistant ballast high induction voltage's LED lamp.

In order to solve the technical problem, the utility model provides a LED lamp of resistant ballast high induced voltage, including printing opacity cover, bed frame, emitting diode group, drive circuit, drive plate, drive box and lamp holder, printing opacity cover with the bed frame is connected, emitting diode group installs on the bed frame, the drive plate with emitting diode group connects, the drive plate is installed in the drive box, the drive box with the lamp holder is connected, external power source is connected to the lamp holder, the drive plate is used for bearing drive circuit, drive circuit includes ballast, rectifier module, current detection module, switch module and switch module drive module, switch module drive module control switch module, ballast and rectifier module make the commercial power change into the direct current that makes emitting diode normally work, emitting diode group, LED group, The current detection module and the switch module are connected in series and then connected to the output end of the rectification module, the control end of the switch module is connected with the switch module driving module, and the cathode of the light emitting diode group is defined as the reference zero potential of the driving circuit. The current detection module is used for detecting the current flowing through the light emitting diode group and transmitting the current value of the detected current into the switch module driving module, if the current value is suddenly increased, such as the moment of switching off the switch, the extremely high induced voltage generated by the ballast generates a corresponding extremely high induced current in the circuit, and the switch module driving module controls the switch module to act, so that the loop is disconnected. The led array further includes a protection resistor for limiting current through the led.

Preferably, the rectifier module is a single-phase bridge rectifier circuit, the single-phase bridge rectifier circuit includes a rectifier diode DS11, a rectifier diode DS12, a rectifier diode DS13 and a rectifier diode DS14, the anodes of the rectifier diodes DS11 and DS12 are connected to the ballast output terminal, the cathode of the rectifier diode DS13 is connected to the anode of the rectifier diode DS11, the cathode of the rectifier diode DS14 is connected to the anode of the rectifier diode DS12, the anodes of the light emitting diode groups are connected to the cathode of the rectifier diode DS11 and the cathode of the rectifier diode DS12, and the switch module is connected to the anode of the rectifier diode DS13 and the anode of the rectifier diode DS 14. The type of the rectifier diode is IN4007, and the maximum rectification current is 1A.

Preferably, the switch module includes a MOS transistor Q11A and a MOS transistor Q11B, the S-pole of the MOS transistor Q11A is connected to the output terminal of the current detection module, the G-pole of the MOS transistor Q11A is connected to the switch module driving module, the D-pole of the MOS transistor Q11A is connected to the anode of a rectifier diode DS13, the S-pole of the MOS transistor Q11B is connected to the output terminal of the current detection module, the G-pole of the MOS transistor Q11B is connected to the switch module driving module, and the D-pole of the MOS transistor Q11B is connected to the anode of a rectifier diode DS 14. The G poles of the MOS transistors Q11A and Q11B are the control terminals of the switch module. When the current increase is detected, the switch module driving module controls Q11A and Q11B to work in a linear region so as to reduce the current of a loop and protect the LED group; when the current continues to be multiplied, the control turns off Q11A and Q11B to protect the LED group.

Preferably, the current detection module includes a resistor R11A and a resistor R11B, the resistor R11A has one end connected to the reference zero potential and the other end connected to the S-pole of the MOS transistor Q11A and the input terminal of the switch module driving module, and the resistor R11B has one end connected to the reference zero potential and the other end connected to the S-pole of the MOS transistor Q11B and the input terminal of the switch module driving module. The current sensing function of the current sensing module is actually sensing the voltage across resistor R11A or R11B.

Preferably, the switch module driving module comprises voltage dividing resistors R12A and R12B and a chip U31, one end of the divider resistor R12A is connected to the live wire, the other end of the divider resistor R12A is connected to one end of the divider resistor R12B and the first I/O pin of the chip U31, the other end of the divider resistor R12B is connected with the reference zero potential, the VDD pin of the chip U31 is connected with a 5V direct current power supply, the second I/O pin of the chip U31 is connected with the G pole of the MOS transistor Q11A, the third I/O pin of the chip U31 is connected to the G pole of the MOS transistor Q11B, the VSS pin of the chip U31 is connected with the reference zero potential, the fourth I/O pin of the chip U31 is connected with the S pole of the MOS transistor Q11A, the fifth I/O pin of the chip U31 is connected to the S-pole of the MOS transistor Q11B, and the sixth I/O pin of the chip U31 is connected with the cathode of the light-emitting diode group.

Preferably, the driving circuit further comprises a filter capacitor CD21, the anode of the filter capacitor CD21 is connected with the cathode of the rectifier diode DS11, and the cathode of the filter capacitor CD21 is connected with the reference zero potential. The filter capacitor enables the direct current voltage output to the light emitting diode group by the rectifying module to be more stable.

Preferably, the driving circuit further includes a thermal fuse F11, a voltage dependent resistor RV11 and a negative temperature coefficient resistor NTC, the thermal fuse F11 is connected in series between the live wire and the rectifier module, one end of the voltage dependent resistor RV11 is connected to the thermal fuse F11, the other end of the voltage dependent resistor RV11 is connected to the zero line, one end of the negative temperature coefficient resistor NTC is connected to the thermal fuse F11, and the other end of the negative temperature coefficient resistor NTC is connected to the anode of the rectifier diode DS 11. The temperature fuse F11 provides over-temperature protection for the driving circuit, the voltage dependent resistor RV11 limits high voltage generated by the ballast to be input into a lower circuit, and the negative temperature coefficient resistor NTC limits input surge current.

Preferably, the shape of the base frame is a hollow hexagonal prism, the light emitting diode groups are uniformly arranged on the outer surface of the base frame, the inner surface of the base frame is provided with a light-transmitting cover positioning groove, and the light-transmitting cover is matched with the base frame. The LEDs are uniformly arranged on the six side faces of the base frame, so that the lamp is high in brightness and uniform in brightness in all directions.

The utility model discloses a substantive effect is: the influence of the ballast induction voltage on the LED when the switch is disconnected is limited under the premise of not dismounting the ballast with extremely low cost, and the technical problems that the service life of the LED is shortened and the ballast is time-consuming and labor-consuming to dismount due to the high induction voltage of the ballast are solved.

Drawings

Fig. 1 is a schematic structural diagram of the first embodiment.

FIG. 2 is a block diagram of module connections according to an embodiment.

Fig. 3 is an electrical schematic of an embodiment.

In the figure: 1. the LED lamp comprises a light-transmitting cover, a base frame 2, a driving plate 3, a driving box 4, a lamp holder 5, a driving circuit 6, a ballast 100, a rectifier module 200, a light-emitting diode group 300, a current detection module 400, a switch module driving module 500 and a switch module 600.

Detailed Description

The following provides a more detailed description of the present invention, with reference to the accompanying drawings.

As shown in fig. 1, an LED lamp resistant to high induction voltage of a ballast includes a light-transmitting cover 1, a base frame 2, a light-emitting diode set 300 (a protection resistor R41 is added in the description), a driving circuit, a driving board 3, a driving box 4 and a lamp holder 5, the light-transmitting cover 1 is connected with the base frame 2, the light-emitting diode set 300 is installed on the base frame 2, the driving board 3 is connected with the light-emitting diode set 300, the driving board 3 is installed in the driving box 4, the driving box 4 is connected with the lamp holder 5, the lamp holder 5 is connected with an external power supply and the ballast, and the driving board 3 is. The appearance of the pedestal 2 is a hollow hexagonal prism, the light emitting diode groups 300 are uniformly arranged on the outer surface of the pedestal 2, the inner surface of the pedestal 2 is provided with a positioning groove for the light-transmitting cover 1, and the light-transmitting cover 1 is matched with the pedestal 2.

As shown in fig. 2, the driving circuit includes a ballast 100, a rectifying module 200, a current detecting module 400, a switching module 600, and a switching module 600 driving module 500, the switching module 600 driving module 500 controls on/off of the switching module 600, the ballast 100 and the rectifying module 200 convert commercial power into direct current for normal operation of the light emitting diodes, the light emitting diode set 300, the current detecting module 400, and the switching module 600 are connected in series and then connected to an output end of the rectifying module 200, and a control end of the switching module 600 is connected to the switching module 600 driving module 500.

As shown in fig. 3, the led group 300 is further connected in series with a protection resistor R41 for limiting the current passing through the diode, and the potential of the end of the resistor R41 not connected to the led is defined as the driving circuit reference zero potential 6. The rectifier module 200 is a single-phase bridge rectifier circuit, the single-phase bridge rectifier circuit includes a rectifier diode DS11, a rectifier diode DS12, a rectifier diode DS13 and a rectifier diode DS14, anodes of the rectifier diodes DS11 and DS12 are connected to the ballast output terminal, a cathode of the rectifier diode DS13 is connected to an anode of the rectifier diode DS11, a cathode of the rectifier diode DS14 is connected to an anode of the DS12, an anode of the capacitor CD21 is connected to a cathode of the rectifier diode DS 92, a cathode of the filter capacitor CD21 is connected to a reference zero potential 6, an anode of the light emitting diode group 300 is connected to a cathode of the rectifier diode DS11 and a cathode of the rectifier diode DS12, an S pole of the MOS transistor Q11A is connected to the output terminal of the current detection module 400, a G pole of the MOS transistor Q11A is connected to the switch module 600 drive module 500, a D pole of the MOS transistor Q11 4684 is connected to an anode of the rectifier diode DS13, an S pole of the MOS transistor Q11B is, the D pole of the MOS transistor Q11B is connected to the anode of the rectifier diode DS 14. The current detection module 400 includes a resistor R11A and a resistor R11B, one end of the resistor R11A is connected to the reference zero potential 6, the other end is connected to the S-pole of the MOS transistor Q11A and the input end of the switch module 600 driving module 500, one end of the resistor R11B is connected to the reference zero potential 6, and the other end is connected to the S-pole of the MOS transistor Q11B and the input end of the switch module 600 driving module 500. The switch module 600 driving module 500 includes voltage dividing resistors R12A, R12B, and a chip U31, wherein the chip U31 is a PIC12F 675. One end of a divider resistor R12A is connected with a live wire, the other end of the divider resistor R12A is connected with one end of a divider resistor R12B and AN AN3 pin of a chip U31, the other end of the divider resistor R12B is connected with a reference zero potential 6, a VDD pin of a chip U31 is connected with a 5V direct-current power supply, a GP5 pin of the chip U31 is connected with a G pole of a MOS transistor Q11A, a GP3 pin of the chip U31 is connected with a G pole of the MOS transistor Q11B, a VSS pin of the chip U31 is connected with the reference zero potential 6, AN AN0 pin of the chip U31 is connected with AN S pole of the MOS transistor Q11A, AN AN1 pin of the chip U31 is connected with AN S pole of the MOS transistor Q11B, and AN AN2 pin of the chip U31 is connected. The temperature fuse F11 is connected in series between the live wire and the one-way bridge rectifier circuit, one end of the voltage dependent resistor RV11 is connected with the temperature fuse F11, the other end of the voltage dependent resistor RV11 is connected with the zero line, one end of the negative temperature coefficient resistor NTC is connected with the temperature fuse F11, and the other end of the negative temperature coefficient resistor NTC is connected with the anode of the rectifier diode DS 11.

When a user turns off the LED lamp, at the moment that the switch is turned off, the voltage at two ends of the ballast changes in a jumping mode, so that a very large induction voltage is generated, when the chip U31 receives the increase of the current value transmitted by the current detection module 400, the MOS transistor Q11A and the MOS transistor Q11B are controlled to work in a linear region, the diode is prevented from being burnt by the overlarge current, and when the chip U31 receives the increase of the current value transmitted by the current detection module 400 and exceeds a set upper limit M, the GP3 pin and the GP5 pin are controlled to output a low level to turn off the MOS transistor, so that the diode is protected.

The above-described embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the invention as set forth in the claims.

Claims

1. The utility model provides a LED lamp of resistant ballast high induced voltage which characterized in that: the LED lamp comprises a light-transmitting cover, a base frame, an LED group, a driving circuit, a driving board, a driving box and a lamp holder, wherein the light-transmitting cover is connected with the base frame, the LED group is installed on the base frame, the driving board is connected with the LED group, the driving board is installed in the driving box, the driving box is connected with the lamp holder, the lamp holder is connected with an external power supply, the driving board is used for bearing the driving circuit, the driving circuit comprises a ballast, a rectifying module, a current detection module, a switch module and a switch module driving module, the switch module driving module controls the switch module, the ballast and the rectifying module convert commercial power into direct current for enabling the LED to normally work, the LED group, the current detection module and the switch module are connected with the output end of the rectifying module after being connected in series, and the control end of the switch module is connected with the switch module driving module to define the cathode of the light-emitting diode group as the reference zero potential of the driving circuit.

2. The ballast high-induction-voltage resistant LED lamp according to claim 1, characterized in that: the rectifier module is a single-phase bridge rectifier circuit, the single-phase bridge rectifier circuit comprises a rectifier diode DS11, a rectifier diode DS12, a rectifier diode DS13 and a rectifier diode DS14, the anode of the rectifier diode DS11 and the anode of the DS12 are connected with the ballast output end, the cathode of the rectifier diode DS13 is connected with the anode of the DS11, the cathode of the rectifier diode DS14 is connected with the anode of the DS12, the anode of the light emitting diode group is connected with the cathode of the rectifier diode DS11 and the cathode of the DS12, and the switch module is connected with the anode of the rectifier diode DS13 and the anode of the DS 14.

3. The ballast high-induction-voltage resistant LED lamp according to claim 2, characterized in that: the switch module includes MOS pipe Q11A and MOS pipe Q11B, MOS pipe Q11A the S utmost point with the current detection module output is connected, MOS pipe Q11A the G utmost point with the switch module drive module is connected, MOS pipe Q11A 'S the D utmost point is connected with rectifier diode DS13 positive pole, MOS pipe Q11B the S utmost point with the current detection module output is connected, MOS pipe Q11B the G utmost point with the switch module drive module is connected, MOS pipe Q11B' S the D utmost point is connected with rectifier diode DS14 positive pole.

4. The ballast high-induction-voltage resistant LED lamp according to claim 3, wherein: the current detection module includes resistance R11A and resistance R11B, resistance R11A one end with reference the zero potential and connecting, the other end with MOS pipe Q11A 'S utmost point and the switch module drive module input is connected, resistance R11B one end with reference the zero potential and connecting, the other end with MOS pipe Q11B' S utmost point and the switch module drive module input is connected.

5. The ballast high-induction-voltage resistant LED lamp according to claim 3, wherein: the switch module driving module comprises voltage dividing resistors R12A and R12B and a chip U31, one end of the divider resistor R12A is connected to the live wire, the other end of the divider resistor R12A is connected to one end of the divider resistor R12B and the first I/O pin of the chip U31, the other end of the divider resistor R12B is connected with the reference zero potential, the VDD pin of the chip U31 is connected with a 5V direct current power supply, the second I/O pin of the chip U31 is connected with the G pole of the MOS transistor Q11A, the third I/O pin of the chip U31 is connected to the G pole of the MOS transistor Q11B, the VSS pin of the chip U31 is connected with the reference zero potential, the fourth I/O pin of the chip U31 is connected with the S pole of the MOS transistor Q11A, the fifth I/O pin of the chip U31 is connected to the S-pole of the MOS transistor Q11B, and the sixth I/O pin of the chip U31 is connected with the cathode of the light-emitting diode group.

6. The ballast high-induction-voltage resistant LED lamp according to claim 2, characterized in that: the driving circuit further comprises a filter capacitor CD21, the anode of the filter capacitor CD21 is connected with the cathode of the rectifier diode DS11, and the cathode of the filter capacitor CD21 is connected with the reference zero potential.

7. The ballast high-induction-voltage resistant LED lamp according to claim 2, characterized in that: the drive circuit still includes temperature fuse F11, piezo-resistor RV11 and negative temperature coefficient resistance NTC, temperature fuse F11 establish ties the live wire with between the rectifier module, piezo-resistor RV11 one end with temperature fuse F11 connects, and the other end is connected with the zero line, negative temperature coefficient resistance NTC one end with temperature fuse F11 is connected, the other end with rectifier diode DS 11's positive pole is connected.

8. The ballast high-induction-voltage resistant LED lamp according to claim 1, characterized in that: the appearance of the base frame is a hollow hexagonal prism, the light emitting diode groups are uniformly arranged on the outer surface of the base frame, a light-transmitting cover positioning groove is formed in the inner surface of the base frame, and the light-transmitting cover is matched with the base frame.