Control circuit and control method for driving common DALI power supply by emergency DALI power supply
By designing the control circuit for driving ordinary DALI power supply, emergency start-up and dimming are realized, the problem of ordinary DALI power supply not being able to drive normally during emergency response, improving compatibility and adaptability, and reducing operating costs.
Patent Information
- Application Number
- CN202411692458.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-02-14
AI Technical Summary
In the prior art, ordinary DALI power is built into the lamp, and emergency DALI power can only be external, which makes it impossible to jointly drive the LED lamp board during emergency, and the output power of the emergency DALI power is not enough to drive high-power ordinary DALI power.
Design a control circuit for driving ordinary DALI power supply to drive ordinary DALI power supply through emergency circuits to power ordinary DALI power supply when mains power is disconnected, and through the control of DALI bus and power line, emergency start-up and emergency dimming are realized to ensure LED lamps Can be illuminated normally when power is out.
Through emergency start-up and emergency dimming, the compatibility and adaptability of emergency power supply and ordinary power supply are improved, the SKU types of emergency power supply are reduced, the operation and management costs are reduced, and the power wiring method is simplified.
Smart Images
Figure CN119450857A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of emergency lighting, and in particular to a control circuit and a control method for an emergency DALI power supply to drive a common DALI power supply. Background Art
[0002] As society continues to advance and develop, people have higher and higher requirements for lighting fixtures. People hope that lighting fixtures will become more and more intelligent. Now many ordinary lighting fixtures have DALI functions, which are based on the excellent DALI dimming and color adjustment performance. However, in certain application scenarios, these lamps need to have emergency lighting functions, and they also need to meet the DALI function in emergencies. Usually, a lamp is equipped with a normal DALI power supply and an emergency DALI power supply, such as Figure 1 As shown, two power supplies drive the LED light together, and the two work in coordination. When there is mains power, the ordinary DALI power supply drives the LED light to work, and when there is no mains power emergency, the emergency DALI power supply drives the LED light to work. This method of jointly driving the LED light board is simple and easy, but the ordinary DALI power supply of some lamps is built in the lamp, and the emergency DALI power supply can only be external. The two power supplies cannot drive the LED light board together. In an emergency, only the emergency DALI power supply can power the ordinary DALI power supply, and the ordinary DALI power supply can then light up the lamp.
[0003] And as Figure 2 The emergency DALI power supply shown directly supplies power to the ordinary DALI power supply. This method is simple to connect. When there is mains power, the emergency DALI power supply directly provides mains power to the ordinary DALI power supply. When there is no mains power, the emergency DALI power supply outputs DC high voltage to drive the ordinary DALI power supply. However, if the power of the ordinary DALI power supply is too high, the emergency output power of the emergency DALI power supply is low. When there is no mains power, the emergency DALI power supply is not enough to drive the ordinary DALI power supply. Since the emergency DALI power supply needs to have sufficient emergency output power, the emergency power must be increased. As a result, the capacity of the emergency power supply backup battery must be increased, and the cost will increase. The method to increase the battery capacity is generally to increase the number of batteries. The battery volume becomes larger, which may be limited by the installation space of the lamps. At the same time, it is not very adaptable to the lamps. It is necessary to do adaptation testing on the customer's lamps before they can be used. However, under possible circumstances, dealers or agents cannot predict the lamps to be applied on the market, and cannot do adaptation testing in advance. They can only prepare some emergency power supplies of various power ranges, which increases the operation and management costs. Summary of the invention
[0004] The technical problem to be solved by the present invention is as follows Figure 1In some lamps, the ordinary DALI power supply is built into the lamp, and the emergency DALI power supply can only be external. The two power supplies cannot drive the LED light board together. In an emergency, only the emergency DALI power supply can power the ordinary DALI power supply, and the ordinary DALI power supply can then light up the lamp. However, in the method shown in the figure, if the power of the ordinary DALI power supply is too high, the emergency output power of the emergency DALI power supply is low. When there is no AC power, the emergency DALI power supply is not enough to drive the ordinary DALI power supply. In view of the above-mentioned defects of the prior art, a control circuit and a control method for an emergency DALI power supply to drive an ordinary DALI power supply are provided.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0006] A control circuit for an emergency DALI power supply to drive an ordinary DALI power supply is constructed, comprising an emergency DALI power supply and an ordinary DALI power supply connected to the emergency DALI power supply, wherein the ordinary DALI power supply supplies power to an LED lamp for lighting, the emergency DALI power supply is connected to a mains power supply through a power line, the emergency DALI power supply is connected to a DALI host through a DALI bus, the emergency DALI power supply comprises an emergency DALI transceiver circuit and an emergency circuit, the ordinary DALI power supply is connected to the mains power supply through a power line inside the emergency DALI power supply, and is connected to the DALI host through a DALI bus, and when the mains power supply is disconnected, the emergency circuit supplies power to the ordinary DALI power supply for emergency lighting of the LED lamp.
[0007] Preferably, the control circuit also includes a first switch arranged on the DALI bus, and a second switch arranged between the DALI buses. The emergency circuit is connected to the power line through a third switch and / or a fourth switch. The third switch and the fourth switch are arranged in parallel. When the mains power is normal, the third switch and the fourth switch are disconnected, and the emergency DALI power supply is powered by the mains power and the ordinary DALI power supply is powered to drive the LED lamp to work. When the mains power is disconnected, the third switch and the fourth switch are closed, and the ordinary DALI power supply is powered by the emergency circuit to drive the LED lamp to work for emergency lighting.
[0008] Preferably, when the first switch is opened and the second switch is closed, the power of the ordinary DALI power supply is reduced to a set value for operation, and the ordinary DALI power supply is driven to start through the emergency circuit.
[0009] Preferably, when the first switch is disconnected and the second switch is disconnected, the emergency DALI command transceiver circuit sends a command to the ordinary DALI power supply, and the ordinary DALI power supply increases the output power until the brightness required for emergency lighting of the LED lamp or the brightness reached by the maximum output power of the emergency DALI power supply is reached, until the voltage of the emergency DALI power supply drops to the cut-off voltage, and the emergency is stopped.
[0010] Preferably, the first switch, the second switch, the third switch and the fourth switch are relay switches or MOS switches, and the first switch is placed between the DALI host and the emergency DALI transceiver circuit, or between the emergency DALI transceiver circuit and the ordinary DALI power supply.
[0011] Construct a control method for an emergency DALI power supply to drive a normal DALI power supply, the method comprising the following steps;
[0012] During normal lighting, the power line supplies power to the ordinary power supply through the emergency power supply and drives the LED lights to illuminate. The DALI host communicates with the emergency power supply and the ordinary power supply through the DALI bus;
[0013] After the power line is cut off, the emergency power supply supplies power to the ordinary power supply to start the ordinary power supply. The characteristic is that after the power line is cut off, the ordinary power supply reduces the power to the set power, and the emergency power supply starts and runs the ordinary power supply after the power of the ordinary power supply is reduced to the set power.
[0014] Preferably, when the power line is powered off, the ordinary power supply reduces the power to the set power;
[0015] When the power line is powered off, the DALI bus is short-circuited, causing the DALI interface to fail. The ordinary power supply reduces the output power to the set power after the DALI interface fails.
[0016] Preferably, the set power is set according to the LED lamp lighting, and the set power is 1%-10% of the maximum power of normal lighting.
[0017] Preferably, after the emergency power supply starts and operates the ordinary power supply after the ordinary power supply power is reduced to the set power, it also includes:
[0018] The emergency power supply increases the output power through the DALI command until the brightness required for emergency lighting of the LED lamp or the brightness reached by the emergency maximum output power to achieve emergency dimming.
[0019] Preferably, after the emergency power supply increases the output power of the emergency power supply through the DALI instruction until the brightness required for emergency lighting of the LED lamp or the brightness reached by the emergency maximum output power to achieve emergency dimming, it also includes:
[0020] After emergency dimming, the DALI bus is turned on to communicate with the emergency power supply and the normal power supply. The emergency power supply maintains constant power output until the backup battery drops to the cut-off voltage and stops the emergency.
[0021] The beneficial effects of the present invention are as follows: by designing emergency start-up and emergency dimming in the circuit, the output power of the ordinary power supply is reduced when the power is off to ensure that the emergency power supply has sufficient power to start the ordinary power supply to supply power for the emergency lighting of the LED lamp. After the ordinary power supply is started, the emergency power supply sends an instruction to increase its output power, thereby increasing the brightness of the emergency lamp. The emergency start-up and emergency dimming greatly improve the compatibility of the emergency power supply with the ordinary power supply, and the adaptation performance is significantly improved. At the same time, the SKU of the emergency power supply is reduced, reducing the operation and management costs, simplifying the wiring method of the emergency power supply and the ordinary power supply, and making full use of the dimming characteristics of the ordinary DALI power supply, so that the emergency DALI power supply can slowly start and drive the ordinary DALI power supply, and the small emergency power can also drive high-power lamps. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:
[0023] Figure 1 This is a connection diagram of two power supplies driving an LED lamp together in the prior art;
[0024] Figure 2 This is a connection diagram of the emergency DALI power supply in the prior art directly supplying power to the ordinary DALI power supply;
[0025] Figure 3 This is a connection diagram of an emergency DALI power supply and a lamp in a preferred embodiment of the present invention;
[0026] Figure 4 This is a block diagram of the internal circuit of the emergency DALI power supply of a preferred embodiment of the present invention;
[0027] Figure 5 Another block diagram of the internal circuit of an emergency DALI power supply according to a preferred embodiment of the present invention;
[0028] Figure 6 Schematic diagram of the control method of a preferred embodiment of the present invention. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.
[0030] A control circuit of an emergency DALI power supply driving a common DALI power supply in a preferred embodiment of the present invention; Figure 3 As shown, it includes an emergency DALI power supply, and an ordinary DALI power supply connected in series with the emergency DALI power supply. The ordinary DALI power supply is connected in series with an LED light source for emergency lighting, and the ordinary DALI power supply can also be built into the LED light board to form an LED lamp. The input end of the emergency DALI power supply is connected to the DALI bus and the power line, and is connected to the ordinary DALI power supply after being processed by the emergency DALI power supply. The power line is connected to the mains to power the ordinary DALI power supply through the emergency DALI power supply to realize the control of the LED light board, and the DALI bus is connected to the DALI host to realize the communication between the emergency DALI power supply and the ordinary DALI power supply. Both the power line and the DALI bus directly power the LED through the emergency DALI power supply and the ordinary DALI power supply, and the LED lamp works normally under the drive of the ordinary DALI power supply. When the power outage causes the mains to be disconnected, the power supply method of the ordinary DALI power supply and the DALI communication method need to be changed to perform the emergency start-up and emergency dimming processes.
[0031] Specifically, Figure 4 As shown, the emergency DALI power supply includes an emergency control circuit, and an emergency DALI transceiver circuit and an emergency circuit connected to the emergency control circuit, wherein the emergency DALI transceiver circuit is connected to the DALI bus, and the emergency circuit is connected to the power line. A second switch K2 is provided between the two groups of wires of the DALI bus, and a first switch K1 is provided on one group of wires, and a third switch K3 and a fourth switch K4 are provided between the live wire and the neutral wire, respectively, wherein the first switch K1 is in a closed state under normal circumstances, and the second switch K2, the third switch K3 and the fourth switch are in an open state under normal circumstances.
[0032] Furthermore, if Figure 4 As shown, when there is AC power, the first switch K1 is closed and the second switch K2 is disconnected, and the emergency DALI bus is connected to the emergency DALI transceiver circuit inside the emergency DALI power supply, and is also connected to the ordinary DALI power supply. The third switch K3 and the fourth switch K4 are disconnected, and the AC power line also directly passes through the ordinary DALI power supply. At this time, the DALI host can access the emergency DALI power supply and the ordinary DALI power supply at the same time, and the ordinary DALI power supply works normally under the drive of the AC power and lights up the LED light board. When a power outage occurs, the power line is disconnected at the moment, and the third switch K3 and the fourth switch K4 are closed to start the emergency circuit to output high-voltage DC power to power the ordinary DALI power supply, and to power the emergency equipment to enable it to perform emergency work.
[0033] Furthermore, if Figure 4As shown, in order to ensure that the high-voltage DC power supply output by the emergency circuit can start the ordinary DALI power supply for emergency power supply, it is necessary to reduce the power of the ordinary DALI power supply to the minimum after the mains is disconnected to ensure that the emergency circuit can start the ordinary DALI power supply. When the mains is disconnected, the first switch K1 is turned on and the second switch K2 is closed, so that the DALI bus will also fail. By using the characteristics of the DALI interface failure, when the DALI interface fails, the ordinary DALI power supply adjusts the power to the power corresponding to the system failure level, that is, the "SYSTEM FAILURE LEVEL" in the DALI standard. Since the power level can be configured at will, the ordinary DALI power supply adjusts the power to the set power after the mains is disconnected. The set power is the minimum power that can ensure startup, such as 1%-10% of the maximum power of normal lighting. This value can be configured before use according to the specific emergency product. At the same time, in order to realize the DALI fault interface, when the AC power is disconnected, the first switch K1 is turned on and the second switch K2 is closed. At this time, the DALI bus of the ordinary DALI power supply is short-circuited. The ordinary DALI power supply detects the DALI bus fault and automatically runs at a low power fault level. Then the emergency circuit starts the ordinary DALI power supply and supplies power to the emergency equipment.
[0034] Furthermore, if Figure 4 As shown, after the emergency circuit starts the ordinary DALI power supply, the brightness of the emergency lighting fixture is low because the operating power of the ordinary DALI power supply is low at this time. It is necessary to increase the operating power of the ordinary DALI power supply until the required brightness of the emergency lighting is reached or the brightness reached by the maximum output power of the emergency DALI power supply. The second switch K2 needs to be disconnected, and the DALI bus will no longer be short-circuited at this time, and the emergency DALI transceiver circuit will temporarily act as the DALI host, sending DALI dimming instructions to the ordinary DALI power supply, and gradually increasing the output power of the ordinary DALI output power supply, thereby increasing the brightness of the emergency lighting fixture.
[0035] Furthermore, if Figure 4 As shown, after the emergency dimming action is completed, the first switch K1 will be closed and the second switch K2 will remain disconnected, so as to restore the DALI host to be connected to the DALI bus of the emergency DALI power supply and the ordinary DALI power supply at the same time, so as to access the emergency DALI power supply and the ordinary DALI power supply normally. At the same time, the emergency DALI power supply maintains a constant power output until the voltage of the backup battery of the emergency DALI power supply drops to the cut-off voltage, at which time the emergency stops. When the mains power is restored, it returns to the normal lighting state.
[0036] It should be noted that for low-power ordinary DALI power supplies, the emergency dimming step may not be set, that is, the process of temporarily acting as a DALI host to send dimming instructions to ordinary DALI power supplies through the emergency DALI transceiver circuit may not be set. Figure 5 As shown, the first switch K1 and the second switch K2 are placed between the emergency DALI transceiver circuit and the DALI host in the aforementioned manner, and the first switch K1 and the second switch K2 can also be placed between the emergency DALI transceiver circuit and the ordinary DALI power supply. At the same time, the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 are all relay switches, which can also be replaced by MOS tube switches, which also belongs to the protection scope of the patent of this invention.
[0037] A control method of an emergency DALI power supply driving a normal DALI power supply according to a preferred embodiment of the present invention; Figure 6 As shown, the method comprises the following steps:
[0038] Step S1: During normal lighting, the power line supplies power to the ordinary power supply through the emergency power supply and drives the LED lamp to illuminate, and the DALI host communicates with the emergency power supply and the ordinary power supply through the DALI bus;
[0039] Specifically, the emergency power supply and the ordinary power supply are connected in series, and the ordinary power supply is connected to the LED lamp, wherein the input end of the emergency power supply is connected to the mains through a power line, and communicates with the DALI host through the DALI bus, and the power line and the DALI bus are both connected to the ordinary power supply, so that the DALI host communicates with the emergency power supply and the ordinary power supply through the bus, and the mains power is transmitted to the ordinary power supply through the emergency power supply to drive the LED lamp to illuminate.
[0040] Step S2: After the power line is powered off, the DALI emergency power supply supplies power to the ordinary power supply to start the ordinary power supply;
[0041] Specifically, when a power outage occurs and the power line is disconnected, the ordinary power supply cannot be connected to the mains. At this time, the ordinary power supply will be connected, and the emergency power supply will output high-voltage direct current to supply power to the ordinary power supply.
[0042] Step S3: After the power line is powered off, the DALI bus is short-circuited, causing the DALI interface to fail, the ordinary power supply reduces the power to the set power, and the emergency power supply starts and runs the ordinary power supply after the ordinary power supply reduces the power to the set power;
[0043] Specifically, after the AC power is disconnected, the DALI bus short-circuit causes the DALI interface to fail, and using the characteristics of the DALI interface failure, the ordinary power supply adjusts the power to the power corresponding to the system failure level, that is, the "SYSTEMFAILURE LEVEL" in the DALI standard. Since this power level can be configured at will, the ordinary power supply adjusts the power to the set power after the AC power is disconnected. The set power is the minimum power that can ensure startup, such as 1%-10% of the maximum power of normal lighting. This value can be configured before use according to the specific emergency product, and then the emergency power supply drives the ordinary power supply to start operation.
[0044] Step S4: The emergency power supply increases the output power of the emergency power supply through the DALI instruction until the brightness required for emergency lighting of the LED lamp or the brightness reached by the emergency maximum output power to achieve emergency dimming;
[0045] Specifically, the emergency power supply temporarily acts as a DALI host and sends DALI dimming instructions to the ordinary power supply, gradually increasing the output power of the ordinary power supply, thereby increasing the brightness of the emergency lighting of the LED lamp. The output power can also be adjusted to the brightness required for the emergency lighting of the LED lamp or the brightness reached by the maximum output power of the emergency power supply.
[0046] Step S5: After emergency dimming, the DALI bus is turned on to communicate with the emergency power supply and the normal power supply. The emergency power supply maintains constant power output until the backup battery drops to the cut-off voltage, and the emergency is stopped;
[0047] Specifically, after the emergency dimming action is completed, the DALI host is connected to the emergency power supply and the ordinary power supply for access at the same time, and the emergency power supply maintains constant power output until the voltage of the emergency power supply backup battery drops to the cut-off voltage and the emergency stops. After the mains power is restored, the emergency power supply is used to supply power to the ordinary power supply through the power line and drive the emergency light for emergency lighting. The DALI host communicates with the emergency power supply and the ordinary power supply through the DALI bus.
[0048] It should be understood that the present invention is described by some embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.
Claims
1. A control circuit for an emergency DALI power supply to drive an ordinary DALI power supply, comprising an emergency DALI power supply and an ordinary DALI power supply connected to the emergency DALI power supply, wherein the ordinary DALI power supply supplies power to an LED lamp to illuminate the LED lamp, and the emergency DALI power supply is connected to the mains via a power line, wherein: The emergency DALI power supply is connected to the DALI host via a DALI bus. The emergency DALI power supply includes an emergency DALI transceiver circuit and an emergency circuit. The ordinary DALI power supply is connected to the mains via a power line inside the emergency DALI power supply, and is connected to the DALI host via a DALI bus. When the mains is disconnected, the emergency circuit supplies power to the ordinary DALI power supply to enable the LED lamp to work as an emergency lighting.
2. The control circuit according to claim 1, characterized in that: The control circuit also includes a first switch arranged on the DALI bus and a second switch arranged between the DALI buses. The emergency circuit is connected to the power line through a third switch and / or a fourth switch. The third switch and the fourth switch are arranged in parallel. When the mains power is normal, the third switch and the fourth switch are disconnected, and the emergency DALI power supply is powered by the mains power and the ordinary DALI power supply is powered to drive the LED lamp to work. When the mains power is disconnected, the third switch and the fourth switch are closed, and the ordinary DALI power supply is powered by the emergency circuit to drive the LED lamp to work for emergency lighting.
3. The control circuit according to claim 2, characterized in that: When the first switch is opened and the second switch is closed, the power of the ordinary DALI power supply is reduced to a set value for operation, and the ordinary DALI power supply is driven to start through the emergency circuit.
4. The control circuit according to claim 2, characterized in that: When the first switch is disconnected and the second switch is disconnected, the emergency DALI command transceiver circuit sends a command to the ordinary DALI power supply, and the ordinary DALI power supply increases the output power until the brightness required for emergency lighting of the LED lamp or the brightness reached by the maximum output power of the emergency DALI power supply is reached, until the voltage of the emergency DALI power supply drops to the cut-off voltage, and the emergency is stopped.
5. The control circuit according to claim 2, characterized in that: The first switch, the second switch, the third switch and the fourth switch are relay switches or MOS switches, and the first switch is placed between the DALI host and the emergency DALI transceiver circuit, or between the emergency DALI transceiver circuit and the normal DALI power supply.
6. A control method for an emergency DALI power supply to drive a normal DALI power supply, the method comprising the following steps; During normal lighting, the power line supplies power to the ordinary power supply through the emergency power supply and drives the LED lights to illuminate. The DALI host communicates with the emergency power supply and the ordinary power supply through the DALI bus. After the power line is powered off, the emergency power supply supplies power to the ordinary power supply to start the ordinary power supply, which is characterized by: After the power line is powered off, the ordinary power supply will reduce the power to the set power, and the emergency power supply will start and run the ordinary power supply after the ordinary power supply is reduced to the set power.
7. The control method according to claim 6, characterized in that: When the power line is powered off, the ordinary power supply reduces the power to the set power; When the power line is powered off, the DALI bus is short-circuited, causing the DALI interface to fail. The ordinary power supply reduces the output power to the set power after the DALI interface fails.
8. The control method according to claim 7, characterized in that: The set power is set according to the LED lamp lighting, and the set power is 1%-10% of the maximum power of normal lighting.
9. The control method according to claim 6, characterized in that: After the emergency power supply starts and operates the ordinary power supply after the ordinary power supply power is reduced to the set power, it also includes: The emergency power supply increases the output power through the DALI command until the brightness required for emergency lighting of the LED lamp or the brightness reached by the emergency maximum output power to achieve emergency dimming.
10. The control method according to claim 9, characterized in that: After the emergency power supply increases the output power of the emergency power supply through the DALI instruction until the brightness required for emergency lighting of the LED lamp or the brightness reached by the emergency maximum output power to achieve emergency dimming, it also includes: After emergency dimming, the DALI bus is turned on to communicate with the emergency power supply and the normal power supply. The emergency power supply maintains constant power output until the backup battery drops to the cut-off voltage and stops the emergency.