CN210867264U - Power supply circuit of emergency lighting lamp - Google Patents
Power supply circuit of emergency lighting lamp Download PDFInfo
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- CN210867264U CN210867264U CN201921755558.5U CN201921755558U CN210867264U CN 210867264 U CN210867264 U CN 210867264U CN 201921755558 U CN201921755558 U CN 201921755558U CN 210867264 U CN210867264 U CN 210867264U
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Abstract
The embodiment of the utility model discloses emergency lighting lamp power supply circuit, include: an alternating current power supply; the first switch comprises a first input end and a second input end, the first input end of the first switch is electrically connected with the zero line end, and the second input end of the first switch is electrically connected with the fire line end; a first input end of the rectifying module is electrically connected with a first output end of the first switch, and a second input end of the rectifying module is electrically connected with a second output end of the first switch; the first input end of the transformation module is electrically connected with the first output end of the rectification module, and the first output end of the transformation module is grounded; the voltage stabilizing module comprises a pulse width modulation control unit and a photoelectric coupler; and the input end of the constant current driving module is electrically connected with the second output end of the voltage transformation module, and the output end of the constant current driving module provides a power supply signal for the emergency lighting lamp. The utility model discloses technical scheme can solve current emergency lighting lamp under hazardous environment, the potential safety hazard of existence.
Description
Technical Field
The embodiment of the utility model provides a relate to circuit technical field, especially relate to an emergency lighting lamp power supply circuit.
Background
The emergency illuminating lamp is a guarantee for safety emergency in public places, and is wide in application range and complex in arrangement environment.
At present, a power supply circuit of an emergency lighting lamp is needed to solve the potential safety hazard of the existing emergency lighting lamp in a dangerous environment.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides an emergency lighting lamp power supply circuit to solve current emergency lighting lamp under hazardous environment, the potential safety hazard of existence.
The embodiment of the utility model provides an emergency lighting lamp power supply circuit, include:
the alternating current power supply comprises a zero line end, a fire line end and a ground line end;
the first switch comprises a first input end and a second input end, the first input end of the first switch is electrically connected with the zero line end, and the second input end of the first switch is electrically connected with the live line end;
a first input end of the rectifying module is electrically connected with a first output end of the first switch, and a second input end of the rectifying module is electrically connected with a second output end of the first switch;
the first input end of the transformation module is electrically connected with the first output end of the rectification module, and the first output end of the transformation module is grounded;
the voltage stabilizing module comprises a pulse width modulation control unit and a photoelectric coupler, the photoelectric coupler comprises a light emitting diode and a photosensitive transistor, an enable/undervoltage end of the pulse width modulation control unit is electrically connected with a collector electrode of the photosensitive transistor, a source electrode of the pulse width modulation control unit is electrically connected with an emitter electrode of the photosensitive transistor, an anode of the light emitting diode is electrically connected with a second output end of the voltage transformation module, a cathode of the light emitting diode is grounded, a second output end of the rectification module is electrically connected with a source electrode of the pulse width modulation control unit, and a drain electrode of the pulse width modulation control unit is electrically connected with a second input end of the voltage transformation module;
the input end of the constant current driving module is electrically connected with the second output end of the voltage transformation module, the output end of the constant current driving module is electrically connected with the anode of the emergency illuminating lamp, and the cathode of the emergency illuminating lamp is grounded;
and the positive electrode of the direct-current rechargeable power supply is electrically connected with the second output end of the voltage transformation module, and the negative electrode of the direct-current rechargeable power supply is grounded.
Optionally, the voltage transformation module further comprises a first resistor, a first end of the first resistor is electrically connected to the anode of the light emitting diode, and a second end of the first resistor is electrically connected to the second output end of the voltage transformation module.
Optionally, the light emitting diode further comprises a first voltage regulator diode and a second resistor, wherein an anode of the first voltage regulator diode is grounded, a cathode of the first voltage regulator diode is electrically connected with a cathode of the light emitting diode, a first end of the second resistor is electrically connected with an anode of the first voltage regulator diode, and a second end of the second resistor is electrically connected with an anode of the light emitting diode.
Optionally, the apparatus further includes a filtering module, where the filtering module includes: the common-mode inductance filter comprises a first capacitor, a third resistor, a fourth resistor and a common-mode inductance filter; the first end of the first capacitor is electrically connected with the first output end of the first switch, the second end of the first capacitor is electrically connected with the second output end of the first switch, the first end of the third resistor is electrically connected with the first output end of the first switch, the second end of the third resistor is electrically connected with the second output end of the first switch, the first end of the fourth resistor is electrically connected with the first output end of the first switch, the second end of the fourth resistor is electrically connected with the second output end of the first switch, the first input end of the common mode inductance filter is electrically connected with the first output end of the first switch, the second input end of the common mode inductance filter is electrically connected with the second output end of the first switch, and the first output end of the common mode inductance filter is electrically connected with the first input end of the rectifier module, and the second output end of the common mode inductance filter is electrically connected with the second input end of the rectifying module.
Optionally, the rectifying module includes a first rectifying diode, a second rectifying diode, a third rectifying diode and a fourth rectifying diode, the anode of the first rectifying diode is electrically connected with the second output end of the common mode inductance filter, the cathode of the first rectifying diode is electrically connected with the cathode of the second rectifying diode, the anode of the second rectifying diode is electrically connected with the cathode of the third rectifying diode and the first output end of the common mode inductance filter respectively, the anode of the third rectifying diode is respectively and electrically connected with the anode of the fourth rectifying diode and the source of the pulse width modulation control unit, the cathode of the fourth rectifier diode is electrically connected with the anode of the first rectifier diode, and the cathode of the first rectifier diode is electrically connected with the first input end of the voltage transformation module.
Optionally, the voltage transformation module includes a transformer, the transformer includes a primary winding and a secondary winding, a first end of the primary winding is electrically connected to the first output end of the rectification module, a second end of the primary winding is electrically connected to the drain of the pwm control unit, a first end of the secondary winding is grounded, and a second end of the secondary winding is electrically connected to the positive electrode of the dc rechargeable power supply.
Optionally, the constant current driving module includes a constant current driving control unit, a power signal input end of the constant current driving control unit is electrically connected to the second output end of the voltage transformation module, a power signal output end of the constant current driving control unit is electrically connected to an anode of the emergency lighting lamp, and a cathode of the emergency lighting lamp is grounded.
Optionally, the constant current driving control unit includes a feedback end, and the feedback end is electrically connected to the anode of the emergency lighting lamp.
Optionally, the emergency lighting lamp further comprises a second voltage stabilizing diode and a third voltage stabilizing diode, wherein the anode of the second voltage stabilizing diode is electrically connected with the feedback end, the cathode of the second voltage stabilizing diode is electrically connected with the anode of the third voltage stabilizing diode, and the cathode of the third voltage stabilizing diode is electrically connected with the anode of the emergency lighting lamp.
Optionally, the emergency lighting lamp further comprises a second switch, a first end of the second switch is electrically connected with the power signal output end of the constant current driving control unit, and a second end of the second switch is electrically connected with the anode of the emergency lighting lamp.
The embodiment of the utility model provides an emergency lighting lamp power supply circuit, first switch switches on, provide alternating current power supply signal through alternating current power supply, rectifier module carries out the voltage transformation, with alternating current power supply signal, convert direct current power supply signal into, rectifier module and voltage stabilizing module provide primary winding's power signal for transformer module, wherein voltage stabilizing module is according to the power signal of transformer module secondary winding output, output duty ratio adjustable power signal, so that transformer module's secondary winding output is stable and be applicable to the power signal of back stage circuit, on the one hand charge for direct current chargeable call, on the other hand provides power signal for constant current drive module, constant current drive module drive emergency lighting lamp is luminous. When the first switch is cut off, the alternating current power supply provides alternating current power supply signals and cannot provide power supply signals for subsequent circuits, the direct current rechargeable power supply provides power supply signals for the constant current driving module, and the constant current driving module drives the emergency illuminating lamp to emit light. When first switch is cut off, can imitate the commercial power outage, emergency lighting lamp's state, if luminous, explain when the commercial power outage, emergency lighting lamp can normally give out light, satisfies emergency lighting lamp's emergency function. When the first switch is conducted, the scene of simulating the mains supply outage can be finished. Technical scheme in this embodiment can imitate when the commercial power outage, the state of emergency lighting lamp, if the discovery can not give out light, can in time overhaul to solve current emergency lighting lamp under hazardous environment, the potential safety hazard of existence.
Drawings
Fig. 1 is a schematic structural diagram of a power circuit of an emergency lighting lamp provided by an embodiment of the present invention
FIG. 2 is a schematic diagram of another emergency lighting lamp power circuit according to an embodiment of the present invention
Fig. 3 is a schematic structural diagram of a first switch and a second switch according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a power circuit of an emergency lighting lamp provided by an embodiment of the present invention, referring to fig. 1, the power circuit of the emergency lighting lamp includes: the alternating current power supply 100 comprises a zero line end A1, a fire line end A2 and a ground line end A3; a first switch 200 including a first input terminal B1 and a second input terminal B2, the first input terminal B1 of the first switch 200 being electrically connected to the neutral terminal a1, the second input terminal B2 of the first switch 200 being electrically connected to the live terminal a 2; the rectifier module 300, a first input end E1 of the rectifier module 300 is electrically connected with the first output end B3 of the first switch 200, and a second input end E2 of the rectifier module 300 is electrically connected with the second output end B4 of the first switch 200; the first input end F1 of the transformation module 400 is electrically connected with the first output end E3 of the rectification module, and the first output end F2 of the transformation module 400 is grounded; the voltage stabilizing module 500 is further included, the voltage stabilizing module 500 includes a pulse width modulation control unit 501 and a photoelectric coupler 502, the photoelectric coupler 502 includes a light emitting diode D1 and a phototransistor T1, an enable/under-voltage terminal G1 of the pulse width modulation control unit 501 is electrically connected to a collector of the phototransistor T1, a source G2 of the pulse width modulation control unit 501 is electrically connected to an emitter of the phototransistor T1, an anode of the light emitting diode D1 is electrically connected to a second output terminal F3 of the voltage transforming module 400, a cathode of the light emitting diode D1 is grounded, a second output terminal E4 of the rectifying module 300 is electrically connected to the source G2 of the pulse width modulation control unit 501, and a drain G3 of the pulse width modulation control unit 501 is electrically connected to a second input terminal F4 of the voltage transforming module 400; the input end H1 of the constant current driving module 600 is electrically connected with the second output end F3 of the voltage transformation module 400, the output end H2 of the constant current driving module 600 is electrically connected with the anode J1 of the emergency illuminating lamp 800, and the cathode J2 of the emergency illuminating lamp 800 is grounded; the positive electrode I1 of the dc rechargeable power supply 700 is electrically connected to the second output terminal F3 of the transformer module 400, and the negative electrode I2 of the dc rechargeable power supply 700 is grounded. Optionally, the pwm control unit 501 includes a bypass terminal G4 electrically connected to the source G2 through a second capacitor C1. Illustratively, the model of the pwm control unit 501 may be TNY268 PN.
In this embodiment, the anode of the light emitting diode D1 is electrically connected to the second output terminal F3 of the transformer module 400, the enable/under-voltage terminal G1 of the pwm control unit 501 is electrically connected to the collector of the phototransistor 5022, so that the voltage signal output from the second output terminal F3 of the transformer module 400 can be fed back to the pwm control unit 501, and the pwm control unit 501 provides a power signal with adjustable duty ratio for the transformer module 400 according to the voltage signal output from the second output terminal F3 of the transformer module 400, thereby outputting a stable power signal suitable for the post-stage circuit.
The embodiment of the utility model provides an emergency lighting lamp power supply circuit, first switch 200 switches on, provide alternating current power supply signal through alternating current power supply 100, rectifier module 300 carries out the voltage transformation, with alternating current power supply signal, convert into direct current power supply signal, rectifier module 300 and voltage stabilizing module 500 provide primary winding's signal for transformer module 400, wherein voltage stabilizing module 500 is according to the signal of transformer module 400 secondary winding output, output duty ratio adjustable signal, so that transformer module 400's secondary winding output is stable and be applicable to the signal of later stage circuit, on the one hand charge for direct current chargeable call 700, on the other hand provides signal for constant current drive module 600, constant current drive module 600 drives emergency lighting lamp and gives out light. When the first switch 200 is turned off, the ac power supply 100 provides an ac power signal and cannot provide a power signal for subsequent circuits, the dc rechargeable power supply 700 provides a power signal for the constant current driving module 600, and the constant current driving module 600 drives the emergency lighting lamp to emit light. When first switch 200 is cut off, can imitate when the commercial power outage, emergency lighting lamp's state, if luminous, explain when the commercial power outage, emergency lighting lamp can normally give out light, satisfies emergency lighting lamp's emergency function. When the first switch 200 is turned on, the scene simulating the power failure of the utility power can be ended. Technical scheme in this embodiment can imitate when the commercial power outage, the state of emergency lighting lamp, if the discovery can not give out light, can in time overhaul to solve current emergency lighting lamp under hazardous environment, the potential safety hazard of existence.
Optionally, the first switch may be a manual self-resetting button, and when the button is pressed, the first switch 200 is in a cut-off state, and may simulate the state of the emergency lighting lamp when the mains supply is powered off, so as to check whether the emergency function of the emergency lighting lamp is normal. When the hand is released, the first switch 200 is in the off state, ending the state simulating mains outage. The first switch may be referred to as a sleep button.
Optionally, on the basis of the above technical solution, referring to fig. 2, the emergency lighting lamp power circuit further includes a first resistor R1, a first end of the first resistor R1 is electrically connected to an anode of the light emitting diode D1, and a second end of the first resistor R1 is electrically connected to the second output terminal F3 of the transformer module 400.
Optionally, on the basis of the above technical solution, in order to improve the voltage stabilizing characteristic, the emergency lighting lamp power supply circuit further includes a first zener diode D2 and a second resistor R2, an anode of the first zener diode D2 is grounded, a cathode of the first zener diode D2 is electrically connected to a cathode of the light emitting diode D1, a first end of the second resistor R2 is electrically connected to an anode of the first zener diode D2, and a second end of the second resistor R2 is electrically connected to an anode of the light emitting diode 5021.
Optionally, on the basis of the above technical scheme, in order to filter noise waves of the ac power signal, the emergency lighting lamp power circuit further includes a filtering module 900, and the filtering module 900 includes: the common-mode inductance filter comprises a first capacitor C2, a third resistor R3, a fourth resistor R4 and a common-mode inductance filter L1; a first end of the first capacitor C2 is electrically connected to the first output terminal B3 of the first switch 200, a second end of the first capacitor C2 is electrically connected to the second output terminal B4 of the first switch 200, a first end of the third resistor R3 is electrically connected to the first output terminal B3 of the first switch 200, a second end of the third resistor R3 is electrically connected to the second output terminal B4 of the first switch 200, a first end of the fourth resistor R4 is electrically connected to the first output terminal B3 of the first switch 200, a second end of the fourth resistor R4 is electrically connected to the second output terminal B4 of the first switch 200, a first input terminal L11 of the common mode inductor filter L1 is electrically connected to the first output terminal B3 of the first switch 200, a second input terminal L12 of the common mode inductor filter L1 is electrically connected to the second output terminal B4 of the first switch 200, a first output terminal L13 of the common mode inductor filter L1 is electrically connected to the first input terminal E1 of the rectifying module 300, and a second input terminal L828653 of the common mode inductor filter L2 is electrically connected to the second input terminal E8653.
Optionally, on the basis of the above technical solution, the rectification module 300 includes a first rectification diode D3, a second rectification diode D4, a third rectification diode D5 and a fourth rectification diode D6, an anode of the first rectification diode D3 is electrically connected to the second output terminal L14 of the common mode inductance filter L1, a cathode of the first rectification diode D3 is electrically connected to a cathode of the second rectification diode D4, an anode of the second rectification diode D4 is electrically connected to a cathode of the third rectification diode D5 and the first output terminal L13 of the common mode inductance filter L1, an anode of the third rectification diode D5 is electrically connected to an anode of the fourth rectification diode D6 and the source G2 of the pulse width modulation control unit 501, a cathode of the fourth rectification diode D6 is electrically connected to an anode of the first rectification diode D3, a cathode of the first rectification diode D3 is electrically connected to the first input terminal 1 of the transformer module 400, the rectifying module 300 is used for converting an ac power signal into a dc power signal.
Optionally, on the basis of the above technical solution, the transforming module 400 includes a transformer 301, the transformer 301 includes a primary winding and a secondary winding, a first end of the primary winding is electrically connected to the first output end E3 of the rectifying module 300, a second end of the primary winding is electrically connected to the drain G3 of the pwm control unit 501, a first end of the secondary winding is grounded, a second end of the secondary winding is electrically connected to the positive electrode I1 of the dc rechargeable power supply 700, and the transforming module 400 outputs a stable power signal suitable for a subsequent circuit.
Optionally, on the basis of the above technical solution, the constant current driving module 600 includes a constant current driving control unit 601, a power signal input terminal K1 of the constant current driving control unit 601 is electrically connected to the second output terminal F3 of the voltage transformation module 400, a power signal output terminal K2 of the constant current driving control unit 601 is electrically connected to the anode J1 of the emergency lighting lamp 800, the cathode J2 of the emergency lighting lamp 800 is grounded, and the constant current driving module 600 directly provides a power signal for the emergency lighting lamp 800.
Optionally, on the basis of the above technical solution, the constant current driving control unit 601 includes a feedback terminal K3, and the feedback terminal K3 is electrically connected to the positive electrode J1 of the emergency lighting lamp 800. In this embodiment, when the voltage collected by the feedback terminal K3 of the constant current driving control unit 601 does not match the preset voltage, the power signal output by the power signal output terminal K2 of the constant current driving control unit 601 is adjusted to be suitable for the input voltage of the anode of the emergency lighting lamp.
Optionally, on the basis of the above technical solution, the emergency lighting lamp further includes a second zener diode D7 and a third zener diode D8, an anode of the second zener diode D7 is electrically connected to the feedback terminal K3, a cathode of the second zener diode D7 is electrically connected to an anode of the third zener diode D8, and a cathode of the third zener diode D8 is electrically connected to the anode J1 of the emergency lighting lamp 800.
Optionally, on the basis of the above technical solution, the emergency lighting power supply circuit further includes a second switch 201, a first end M1 of the second switch 201 is electrically connected to a power signal output end K2 of the constant current driving control unit 601, and a second end M2 of the second switch 201 is electrically connected to an anode J1 of the emergency lighting lamp 800.
In this embodiment, when the second switch 201 is in the on-state, emergency lighting lamp 800 can be under the effect of first switch 200, when realizing imitating the commercial power outage, whether the emergency lighting lamp can satisfy emergency lighting lamp's emergency state is examined, emergency lighting lamp is luminous, explain the emergency state that satisfies emergency lighting lamp, emergency lighting lamp is not luminous, explain unsatisfied emergency lighting lamp's emergency state, need overhaul emergency lighting power supply circuit, when second switch 201 is in the off-state, no matter commercial power first switch is the on-state or the off-state, emergency lighting lamp 800 does not have power signal, can not give out light, when being applicable to the commercial power outage, need not light emergency lighting lamp 800's scene, reach the electric quantity of saving direct current rechargeable battery 700, the technological effect of the life of emergency lighting lamp 800 has been prolonged.
Optionally, the second switch 201 may be a manual self-locking button, and when pressed for the first time, the second switch is in a turned-on state, the button cannot jump up completely after the hand is released, and is in a locked state, and when pressed again, the second switch 201 may also be referred to as a test button, corresponding to a turned-off state of the second switch.
Optionally, referring to fig. 3, a protective cover 10 is provided outside the second switch 201, and a specific tool is required to be used during operation, so as to avoid misoperation.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. An emergency lighting lamp power supply circuit, comprising:
the alternating current power supply comprises a zero line end, a fire line end and a ground line end;
the first switch comprises a first input end and a second input end, the first input end of the first switch is electrically connected with the zero line end, and the second input end of the first switch is electrically connected with the live line end;
a first input end of the rectifying module is electrically connected with a first output end of the first switch, and a second input end of the rectifying module is electrically connected with a second output end of the first switch;
the first input end of the transformation module is electrically connected with the first output end of the rectification module, and the first output end of the transformation module is grounded;
the voltage stabilizing module comprises a pulse width modulation control unit and a photoelectric coupler, the photoelectric coupler comprises a light emitting diode and a photosensitive transistor, an enable/undervoltage end of the pulse width modulation control unit is electrically connected with a collector electrode of the photosensitive transistor, a source electrode of the pulse width modulation control unit is electrically connected with an emitter electrode of the photosensitive transistor, an anode of the light emitting diode is electrically connected with a second output end of the voltage transformation module, a cathode of the light emitting diode is grounded, a second output end of the rectification module is electrically connected with a source electrode of the pulse width modulation control unit, and a drain electrode of the pulse width modulation control unit is electrically connected with a second input end of the voltage transformation module;
the input end of the constant current driving module is electrically connected with the second output end of the voltage transformation module, the output end of the constant current driving module is electrically connected with the anode of the emergency illuminating lamp, and the cathode of the emergency illuminating lamp is grounded;
and the positive electrode of the direct-current rechargeable power supply is electrically connected with the second output end of the voltage transformation module, and the negative electrode of the direct-current rechargeable power supply is grounded.
2. The emergency lighting lamp power supply circuit according to claim 1,
the LED driving circuit further comprises a first resistor, wherein the first end of the first resistor is electrically connected with the anode of the LED, and the second end of the first resistor is electrically connected with the second output end of the voltage transformation module.
3. The emergency lighting lamp power supply circuit according to claim 1,
the LED lamp also comprises a first voltage stabilizing diode and a second resistor, wherein the anode of the first voltage stabilizing diode is grounded, the cathode of the first voltage stabilizing diode is electrically connected with the cathode of the LED, the first end of the second resistor is electrically connected with the anode of the first voltage stabilizing diode, and the second end of the second resistor is electrically connected with the anode of the LED.
4. The emergency lamp power supply circuit according to claim 1, further comprising a filtering module, the filtering module comprising: the common-mode inductance filter comprises a first capacitor, a third resistor, a fourth resistor and a common-mode inductance filter; the first end of the first capacitor is electrically connected with the first output end of the first switch, the second end of the first capacitor is electrically connected with the second output end of the first switch, the first end of the third resistor is electrically connected with the first output end of the first switch, the second end of the third resistor is electrically connected with the second output end of the first switch, the first end of the fourth resistor is electrically connected with the first output end of the first switch, the second end of the fourth resistor is electrically connected with the second output end of the first switch, the first input end of the common mode inductance filter is electrically connected with the first output end of the first switch, the second input end of the common mode inductance filter is electrically connected with the second output end of the first switch, and the first output end of the common mode inductance filter is electrically connected with the first input end of the rectifier module, and the second output end of the common mode inductance filter is electrically connected with the second input end of the rectifying module.
5. The emergency lighting lamp power supply circuit according to claim 4,
the rectifying module comprises a first rectifying diode, a second rectifying diode, a third rectifying diode and a fourth rectifying diode, wherein the anode of the first rectifying diode is electrically connected with the second output end of the common-mode inductance filter, the cathode of the first rectifying diode is electrically connected with the cathode of the second rectifying diode, the anode of the second rectifying diode is electrically connected with the cathode of the third rectifying diode and the first output end of the common-mode inductance filter, the anode of the third rectifying diode is electrically connected with the anode of the fourth rectifying diode and the source electrode of the pulse width modulation control unit, the cathode of the fourth rectifying diode is electrically connected with the anode of the first rectifying diode, and the cathode of the first rectifying diode is electrically connected with the first input end of the voltage transformation module.
6. The emergency lighting lamp power supply circuit according to claim 1, wherein the transforming module comprises a transformer, the transformer comprises a primary winding and a secondary winding, a first end of the primary winding is electrically connected to the first output terminal of the rectifying module, a second end of the primary winding is electrically connected to the drain of the pwm control unit, a first end of the secondary winding is grounded, and a second end of the secondary winding is electrically connected to the positive terminal of the dc rechargeable power supply.
7. The emergency lighting lamp power supply circuit according to claim 1, wherein the constant current driving module comprises a constant current driving control unit, a power signal input end of the constant current driving control unit is electrically connected with the second output end of the voltage transformation module, and a power signal output end of the constant current driving control unit is electrically connected with the anode of the emergency lighting lamp.
8. The emergency lighting lamp power supply circuit according to claim 7,
the constant current driving control unit comprises a feedback end, and the feedback end is electrically connected with the anode of the emergency illuminating lamp.
9. The emergency lighting lamp power supply circuit according to claim 8,
the emergency lighting lamp further comprises a second voltage stabilizing diode and a third voltage stabilizing diode, wherein the anode of the second voltage stabilizing diode is electrically connected with the feedback end, the cathode of the second voltage stabilizing diode is electrically connected with the anode of the third voltage stabilizing diode, and the cathode of the third voltage stabilizing diode is electrically connected with the anode of the emergency lighting lamp.
10. The emergency lighting lamp power supply circuit according to claim 7, further comprising a second switch, wherein a first end of the second switch is electrically connected to the power signal output end of the constant current driving control unit, and a second end of the second switch is electrically connected to the anode of the emergency lighting lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921755558.5U CN210867264U (en) | 2019-10-18 | 2019-10-18 | Power supply circuit of emergency lighting lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921755558.5U CN210867264U (en) | 2019-10-18 | 2019-10-18 | Power supply circuit of emergency lighting lamp |
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| CN210867264U true CN210867264U (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737360A (en) * | 2020-12-29 | 2021-04-30 | 上海骄成机电设备有限公司 | Rectifying circuit and power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737360A (en) * | 2020-12-29 | 2021-04-30 | 上海骄成机电设备有限公司 | Rectifying circuit and power supply |
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