RU2813838C1 - Intelligent multi-lamp lighting device with high-pressure sodium lamps using one power supply - Google Patents

Abstract

FIELD: lighting systems.

SUBSTANCE: invention relates to lighting systems and can be used at least in agriculture for additional illumination of crops with artificial light of high-pressure sodium lamps (HPSL) in greenhouses. Intelligent multi-lamp lighting device with high-pressure sodium lamps using one power supply comprises a lamp with high-pressure sodium lamps. All lamps with HPSL of low power are connected to one power source enclosed in a housing from aluminium profile, and are removed from it at distance from 1 to 15 meters by means of power wires. Each lamp consists of series-connected current sensor, half-bridge inverter and lamp ignition device, the first and second outputs of which are connected to corresponding HPSL outputs. First inputs of the current sensors are combined and are the inputs of the lamps; second outputs of current sensors are outputs of lamps. Power supply includes an output current limiter, the output of which is the output of the power supply and is connected to the input of the lamps. Output of the power factor corrector is connected to the first input of the output current limiter, the second input of which is connected to the second output of the control unit with a microprocessor, wherein outputs of each lamp are connected to the corresponding inputs of the control unit with a microprocessor.

EFFECT: providing compactness and functionality of the design of the device for the possibility of placing the lamp at a short distance from ground (2–3 meters), while improving uniformity of illumination without the risk of damaging the illuminated objects, and improving safety of the device.

1 cl, 2 dwg

Description

The invention relates to lighting systems and can be used at least in agriculture when supplementing agricultural crops with artificial light from high-pressure sodium lamps (HPS) in greenhouses.

Known lighting system (Lighting system) RU 2581653 C2, 04/20/2016.

The known device contains:

- a control unit capable of regulating the power modes of each connected lamp;

- many connected lamps;

- external power supply with the ability to connect an NLVD.

The device is a lighting system in which many lamps connected to this lighting system are controlled from a single unit, and the operation of the system itself is carried out by a common control computer. When controlling luminaires, their individual characteristics are taken into account, while the control logic is based on the starting characteristics for the luminaires in the system. The control unit receives information regarding which luminaires have instantaneous switching capability when transitioning from an off to on state, and which luminaires must be preheated or, for example, energized with a ramp signal when switching from an off to on state.

The disadvantages of the known device are: increased cost of lighting equipment; lack of power control (dimming) of lamps.

These disadvantages are due to the fact that the design of the lamp itself and its power source has not been changed, and the operation of many lamps occurs by adding an external control system, which entails an increase in the cost of the equipment. The control system regulates the operation of the luminaires only in standby mode and during startup. In general, the control system only provides voltage to the power supplies of the lamps, taking into account their individual characteristics, without in any way monitoring their condition and serviceability. In case of failure of any lamp or in case of abnormal operation, the system does not take any action, and, consequently, electric current continues to flow to the faulty lamp, which entails inefficient energy consumption. In addition, control of luminaires by power (dimming) is impossible, because The device uses ready-made luminaires, in which the power parameters are already configured.

Also known is a double-lamp intelligent switching electronic ballast, described in patent CN102938965A, 02/20/2013.

The known device contains:

- Control block;

- power supply;

- rectifier;

- housing made of aluminum profile.

This device is an intelligent pulsed electronic ballast (power supply) with two lamps, capable of switching circuits to switch the light source. The known device comprises a first AC power input and a second AC power input; the first AC input power serves as a power source, is connected to the relay unit, and is connected to the control unit through the DC/DC converter unit; and the second AC input power serves as a signal source and is connected in series with the AC converting unit, the control unit and the relay unit; and the relay block is provided with two output ends. The first AC power supply supplies power in a normal state, the second AC power supply supplies pulse signals to the control unit, and the control unit controls the relay unit after receiving pulse signals from the second AC power supply and switches circuits to achieve circuit commutation. The output of the electronic ballast can be connected to only one incandescent light bulb with the possibility of intensive control of lighting fixtures in the room.

The disadvantages of the known device are: the impossibility of using a low-pressure light drive, uneven illumination, short service life, lack of power control (dimming) of lighting devices.

These disadvantages are due to the fact that this power source can only be used for incandescent lamps, which have low light output compared, for example, with low-pressure lamps. It is possible to connect only two incandescent lamps to the power source, the operation of which is carried out alternately, and therefore the area is illuminated unevenly, and for greater illumination the number of lighting fixtures will increase. The presence of an electromagnetic relay to turn on each lamp can cause burnt contacts and premature failure of the power source.

The set of features that is closest to the set of essential features of the proposed technical solution is inherent in the known device, which is a two-lamp driver with digital control (Numerical control dual-lamp driver) CN104837290A, 08/12/2015, adopted as a prototype.

A block diagram of the prototype device is shown in Fig. 1.

In fig. 1 the following designations are adopted:

1 - power supply;

2 - lamp body;

3.1, 3.2 - NLVD;

4.1 - lamp ignition device;

5.1 - half-bridge inverter;

6.1 - current sensor;

7 - surge protector;

8 - rectifier;

9 - secondary voltage converter;

10 - power factor corrector;

12 - control unit with microprocessor.

The prototype device contains a lamp housing 2, in which the low-pressure heat pumps 3.1, 3.2 are located, as well as a power supply 1, which includes a series-connected mains filter 7, a rectifier 8 and a secondary voltage converter 9, a power factor corrector 10 and a half-bridge inverter 5.1, output which is connected to the input of current sensor 6.1. In this case, the first output of the control unit with microprocessor 12 is connected to the second inputs of the power factor corrector 10 and the half-bridge inverter 5.1, the third input of which is the control signal input. The second output of the control unit with microprocessor 12 is connected to the input of the lamp ignition device 4.1, the first and second outputs of which (which are the corresponding outputs of the power source 1) are connected to the terminals of the first 3.1 and second 3.2 NLVD. Other outputs of the first 3.1 and second 3.2 NLVD are connected to the corresponding outputs of the current sensor 6.1.

In the prototype device, the power source 1 can simultaneously control two independent HPDCs 3.1, 3.2 and, accordingly, control the operating mode of each HPDC 3.1, 3.2. The prototype device has a self-diagnosis function and diagnostics of the state of each NLVD 3.1, 3.2 according to specified parameters and a power control function (dimming). Power source 1 is controllable and the operating modes of NLVD 3.1, 3.2 can be changed according to signals from the external control bus.

The disadvantages of the prototype device are: uneven illumination, the inability to space low-pressure heat pumps at a distance from each other due to the increased risk of electric shock, increased cost of the design, and impossibility of use in low greenhouses.

These disadvantages are due to the fact that only two NLVDs 3.1, 3.2 can be connected to one power source 1, which leads to greater illumination unevenness in comparison with the claimed device. The presence of a current sensor 6.1 with a relay circuit for switching lamps to turn on each NLVD 3.1, 3.2 can cause contact burning and premature failure of the power source. Power supply 1 for both NLVDs 3.1, 3.2 is mounted in a single housing with a current sensor 6.1, a half-bridge inverter 5.1 and a lamp ignition device 4.1, and NLVDs 3.1, 3.2 located in the same housing with the power supply, in turn, are connected in close proximity to the source power supply 1 wires. Due to the high voltage at the moment of ignition of NLVD 3.1, 3.2 (several kilovolts), there is a possible risk of electric shock, therefore, in this device it is impossible to move NLVD 3.1, 3.2 several meters from power source 1 due to the need to use high-voltage wires with good insulation, which entails an increase in the cost of the design and the need to attract service personnel with a certain form of access to work with high voltage. The high power of NLVD 3.1, 3.2 produces a large heat release, which is why, when this device is used in low greenhouses, the plants burn and dry out.

The claimed invention, an intelligent multi-lamp lighting device with high-pressure sodium lamps using a single power source, eliminates the above disadvantages.

The task to which the proposed device is aimed is to ensure the compactness and functionality of the design for the possibility of placing the lamp at a short distance from the ground (2-3 meters), while improving the uniformity of illumination without the danger of damaging the illuminated objects, as well as increasing the safety of the device, as well as its reduction in price.

To solve this problem, an intelligent multi-lamp lighting device with high-pressure sodium lamps (HPS) using a single power source, containing a lamp with high-pressure sodium lamps, a lamp ignition device, a half-bridge inverter, a current sensor, and a power source consisting of series-connected line filter, rectifier, secondary voltage converter, power factor corrector, as well as a control unit with a microprocessor, made with a dimming function, the first output of which is connected to the second input of the power factor corrector, the control input of the control unit with a microprocessor is the control signal input; the input of the mains filter is the input of the network, according to the invention, at least three identical lamps are introduced, all lamps with low-power low-power low-voltage luminaires are connected to one power source, enclosed in an aluminum profile housing, and are removed from it at a distance of 1 to 15 meters using power wires, with each lamp consisting of a series-connected current sensor, a half-bridge inverter and a lamp ignition device, the first and second outputs of which are connected to the corresponding terminals of the NLVD; the first inputs of the current sensors of all lamps are combined and serve as their input; the second outputs of the current sensors of all lamps are their outputs; in addition, the power supply includes an output current limiter, the output of which is the output of the power source and is connected to the input of the lamps; the output of the power factor corrector is connected to the first input of the output current limiter, the second input of which is connected to the second output of the control unit with a microprocessor, and the outputs of each lamp are connected to the corresponding inputs of the control unit with a microprocessor.

Thus, the problem is solved by simultaneously connecting from 4 to 6 lamps with high-pressure sodium lamps (HPS) of low power (150-250 W) to one power source and located at a distance of 1-15 meters from the power source, while common power circuits (control unit with a microprocessor, power factor corrector, surge protector, rectifier, secondary voltage converter, output current limiter) for 4-6 lamps are located in one power source and are enclosed in a separate block. The current sensor and the lamp ignition device are mounted in the luminaire, which makes it possible to space luminaires connected to the same power source using conventional power wires designed for a typical industrial voltage of 400 V from each other at a distance of 1-15 meters, while the supply voltage is The lamp is supplied with low voltage, and high voltage (of the order of several kilovolts) for igniting the low-pressure heat pump is formed directly in the lamp, which reduces the risk of electric shock and the need to lay high-voltage cables to spaced lamps.

In the case of application of the claimed invention, for example, in greenhouses, it becomes possible to reduce the cost, weight and dimensions of a greenhouse lighting device located above the plants, due to the use of common electronic components for several (4-6 pcs.) lamps connected to one power source and combining the structure into a separate block. Due to the use of 4-6 low-power low-pressure pumps in one device, it can be used in low (2-3 meters) greenhouses, because The thermal radiation of powerful low-pressure heat pumps damages the tops of plants. The use of several lower power low-pressure lamps, enclosed in a single design, makes it possible to improve the uniformity of lighting in greenhouses due to a more frequent arrangement of lamps, as well as to use horizontal (for general illumination of plants) and vertical (for inter-row illumination of plants) arrangement of lamps in one lighting device. The claimed device also provides a power control function (dimming) and the presence of a current sensor that controls the operation of each low-pressure heater. The control unit is built into the power source and controls the total current at the output of the power source depending on the state of the luminaires connected to it using a feedback signal about their state, and, in addition, can change their power using an external control signal.

The essence of the proposed device is illustrated by drawings.

The block diagram of the device is shown in Fig. 2.

In fig. 2 the following notations are adopted:

1 - power supply;

2.1, 2.2, 2.3, 2.4 - lamp;

3.1, 3.2, 3.3, 3.4 - low-pressure LVD mounted in the luminaire;

4.1, 4.2, 4.3, 4.4 - lamp ignition device;

5.1, 5.2, 5.3, 5.4 - half-bridge inverter;

6.1, 6.2, 6.3, 6.4 - current sensor;

7 - surge protector;

8 - rectifier;

9 - secondary voltage converter;

10 - power factor corrector;

11 - output current limiter;

12 - control unit with microprocessor.

An intelligent multi-lamp lighting device with high-pressure sodium lamps using a single power source contains a power source 1, mounted separately in an aluminum profile housing, allowing you to simultaneously connect 4 - 6 lamps 2.1, 2.2, 2.3, 2.4, remote from the power source at a distance of 1 - 15 m using power cables rated for 400 V.

In this case, the power supply 1 contains a series-connected network filter 7, a rectifier 8, a secondary voltage converter 9, a power factor corrector 10 and an output current limiter 11, the output of which is the output of the power source 1. In addition, the first and second outputs of the control unit with a microprocessor 12 connected to the second inputs of the power factor corrector 10 and the output current limiter 11, respectively. Inputs from the first to fourth control unit with microprocessor 12 are the corresponding inputs of the power source 1 and are connected to the outputs of the corresponding lamps 2.1 - 2.4, the inputs of which are combined and connected to the output of the power source 1. The fifth input of the control unit with microprocessor 12 is the control signal input. Line filter input 7 network input.

Lamps 2.1 - 2.4 are identical; consider one of them, for example, 2.1, containing a series-connected current sensor 6.1, a half-bridge inverter 5.1 and a lamp ignition device 4.1, the first and second outputs of which are connected to the corresponding terminals of the NLVD 3.1. In this case, the first inputs of current sensors 6.1 - 6.4 are the inputs of lamps 2.1 -2.4. The second outputs of current sensors 6.1 - 6.4 are the outputs of lamps 2.1 - 2.4.

For clarity, in Fig. Figure 2 shows four lamps 2.1, 2.2, 2.3, 2.4. In the housing of each lamp 2.1, 2.2, 2.3, 2.4, the corresponding low-pressure lamps 3.1, 3.2, 3.3, 3.4 are mounted, a device for igniting the lamp 4.1, 4.2, 4.3, 4.4, which produces a high-voltage pulse (about 3 - 4 kV) to ensure ignition of the high-pressure lamp, half-bridge inverter 5.1, 5.2, 5.3, 5.4 for powering the low-pressure heat pump in operating mode and a current sensor 6.1, 6.2, 6.3, 6.4, used to monitor the power consumption of the high-pressure heat pump. In the power supply 1 - common for 4 - 6 lamps 2.1, 2.2, 2.3, 2.4, a mains filter 7, a rectifier 8, a secondary voltage converter 9, a power factor corrector 10, an output current limiter 11 and a control unit with a microprocessor 12 are mounted.

The inventive device operates as follows.

All lamps 2.1, 2.2, 2.3, 2.4 are connected in parallel according to the voltage supplying them. The luminaires supply voltage of 400 V and a frequency of 140 KHz is generated in power source 1 by secondary voltage converter 9.

When supply voltage is applied to the output of the output current limiter 11 of power source 1, the signal from the control unit with microprocessor 12 generates the rated operating voltage for the low-pressure heat pump (about 400 V) and a current corresponding to approximately 40% of the rated power of all high-pressure heat pumps 3.1, 3.2, 3.3, 3.4 connected to the power supply of lamps 2.1, 2.2, 2.3, 2.4. At the same time, the control unit with microprocessor 12 sends a signal to the power factor corrector 10 to change the phase shift between voltage and current, corresponding to the type and power of the LVD 3.1, 3.2, 3.3, 3.4 connected to the lamps.

When voltage is supplied, each lamp ignition device 4.1, 4.2, 4.3, 4.4 attempts to ignite the low-pressure pump 3.1, 3.2, 3.3, 3.4. If the discharge in the low-pressure stage lights up, the current sensor 6.1, 6.2, 6.3, 6.4 detects an increase in the current consumed by the lamp 2.1, 2.2, 2.3, 2.4 and generates a signal for the control unit with microprocessor 12 that the lamp 2.1, 2.2, 2.3, 2.4 is in working order. Similar signals are generated by all current sensors 6.1, 6.2, 6.3, 6.4 in all lamps 2.1, 2.2, 2.3, 2.4. If the NLVD 3.1 or 3.2, or 3.3, or 3.4 in the corresponding lamp 2.1 or 2.2, or 2.3, or 2.4 is not ignited, the lamp ignition device 4.1 or 4.2, or 4.3, or 4.4, corresponding to each lamp 2.1 or 2.2, or 2.3, or 2.4 makes another 3 - 5 attempts to ignite, after which the control unit with microprocessor 12 transmits a signal that there is no current flowing through this lamp. The control unit with microprocessor 12 considers lamp 2.1 or 2.2, or 2.3, or 2.4 faulty, and issues a command to the output current limiter 11 to reduce the output current by an amount equal to the current consumption of the faulty lamp 2.1 or 2.2, or 2.3, or 2.4 and a command to the power factor corrector 10 to change the phase shift parameters between voltage and current. Then the control unit with microprocessor 12 issues a command to the output current limiter 11 to smoothly raise the operating current of serviceable lamps 2.1, 2.2, 2.3, 2.4) 40% to the nominal value within 5 - 7 minutes.

Power control (dimming) of each of the lamps 2.1, 2.2, 2.3, 2.4 is carried out by supplying a standard voltage to a separate input of the control unit with microprocessor 12, galvanically isolated using an optocoupler from the rest of the electronics 7, 8, 9, 10, 11 of the power source 1 of the device. Dimming is carried out in the range of 40-100% of the rated power of the device by applying a standard voltage of 0-10 V to the control input. The control unit with microprocessor 12 unlocks the power control signal input only after determining the number of working lamps 2.1, 2.2, 2.3, 2.4 and setting the optimal phase shift between voltage and current by the power factor corrector 10 for the number of working lamps 2.1, 2.2, 2.3, 2.4.

Thus, the achieved technical result is to ensure the compactness and functionality of the device design for the possibility of placing the lamp at a short distance from the ground (2 - 3 meters), while improving the uniformity of lighting without the risk of damaging the illuminated objects, increasing the safety of the device, as well as reducing its cost.

Claims (2)

1. An intelligent multi-lamp high-pressure sodium (HPS) lighting device using a single power supply, containing a high-pressure sodium lamp, a lamp igniter, a half-bridge inverter, a current sensor, and a power supply consisting of a series-connected surge protector, a rectifier, a secondary voltage converter, a power factor corrector, as well as a control unit with a microprocessor, made with a dimming function, the first output of which is connected to the second input of the power factor corrector, the control input of the control unit with a microprocessor is the control signal input; The line filter input is the network input; characterized in that at least three identical lamps are introduced, all lamps with low-power low-power low-pressure lamps are connected to one power source, enclosed in an aluminum profile housing, and are removed from it at a distance of 1 to 15 meters using power wires, with In this case, each lamp consists of a series-connected current sensor, a half-bridge inverter and a lamp ignition device, the first and second outputs of which are connected to the corresponding terminals of the NLVD; the first inputs of the current sensors are combined and are the inputs of lamps; the second outputs of the current sensors are the outputs of the lamps; in addition, the power supply includes an output current limiter, the output of which is the output of the power source and is connected to the input of the lamps; the output of the power factor corrector is connected to the first input of the output current limiter, the second input of which is connected to the second output of the control unit with a microprocessor, and the outputs of each lamp are connected to the corresponding inputs of the control unit with a microprocessor. 2. The device according to claim 1, characterized in that the power wires are designed for a typical voltage of 400 V.