High bay lamp
Powerful lamps upto a few kilowatt
Highbays are popular lamps for industrial halls. They can be recognized by the typical bell shape they have. They have very powerful lamps of 500W upto a few kilowatt.To use LED for this application is very attractive because of the amount of power used, even a small reduction would bring big savings.
Challenges
There are also challenges in an LED solution. Being inside close to the roof of the building makes temperatures rise far above the normal ambient temperature. The high power LEDs form an addtional heat source that is not favourable to driver lifetime. Servicability is low considering that it will take special equipment to reach the lamps.A special requirement for this project was the wish to integrate the driver into the LED fixture, rather than suspending it like is seen in many of these projects. Apart from the esthetic consequence of that, the packaging size increases and therefore the distribution costs.
The solution
In close co-operation with the designer of the fixture, and using a patented solution for the housing, a driver was developed with extreme efficiency in its class (150 Watt) and with a minimum driver size so fitting it inside the body would become possible.Be extensive testing and temperature modelling it was confirmed that this product will easily last the warranted 5 year lifetime.
A class-leading highbay lamp has been created with this.
Questions about this project?
Please contact our Managing Director Erik van Beusekom for questions about High bay lamp. You can also call Erik: +31 (0)76 58 16 969.LED Wiki: Wi-Fi, Zigbee and Bluetooth compared
Key characteristics of ZigBee, Wi-Fi and Bluetooth
| ZigBee | Wi-Fi | Bluetooth | |
| Range | 10-100 meters | 50-100 meters | 10 – 100 meters |
| Networking Topology | Ad-hoc, peer to peer, star, or mesh | Point to hub | Ad-hoc, very small networks |
| Operating Frequency | 868 MHz (Europe) 900-928 MHz (NA), 2.4 GHz (worldwide) | 2.4 and 5 GHz | 2.4 GHz |
| Complexity (Device and application impact) | Low | High | High |
| Power Consumption (Battery option and life) | Very low (low power is a design goal) | High | Medium |
| Security | 128 AES plus application layer security | 64 and 128 bit encryption | |
| Typical Applications | Industrial control and monitoring, sensor networks, building automation, home control and automation, toys, games | Wireless LAN connectivity, broadband Internet access | Wireless connectivity between devices such as phones, PDA, laptops, headsets |
LED Wiki: DALI - Digital Adressable Lighting Interface
Standards for DALI
IEC 60929 and IEC 62386 are technical standards for network-based systems that control lighting in building automation. They were established as a successor for 0-10 V lighting control systems, and as an open standard alternative to Digital Signal Interface (DSI), on which it is based. IEC 60929 is the first version of the standard and will be withdrawn by 23rd of June 2014. Members of the AG DALI are allowed to use the Digital Addressable Lighting Interface (DALI) trademark on devices that are compliant with the current standard. Non AG DALI members can apply for a fee bearing licence.
A DALI network
A DALI network consists of a controller and one or more lighting devices (e.g., electrical ballasts and dimmers) that have DALI interfaces. The controller can monitor and control each light by means of a bi-directional data exchange. The DALI protocol permits devices to be individually addressed and it also incorporates Group and Scene broadcast messages to simultaneously address multiple devices (e.g., "Group 1 goto 100%" or "Recall Scene 1").
Each lighting device is assigned a unique static address in the numeric range 0 to 63, making possible up to 64 devices in a standalone system. Alternatively, DALI can be used as a subsystem via DALI gateways to address more than 64 devices. Data is transferred between controller and devices by means of an asynchronous, half-duplex, serial protocol over a two-wire differential bus, with a fixed data transfer rate of 1200 bit/s.
DALI requires a single pair of wires to form the bus for communication to all devices on a single DALI network. The network can be arranged in a bus or star topology, or a combination of these. The DALI System is not classified as SELV (Separated Extra Low Voltage) and therefore may be run next to the mains cables or within a multi-core cable that includes mains power. The DALI data is transmitted using manchester encoding and has a high signal to noise ratio which enables reliable communications in the presence of a large amount of electrical noise. DALI employs a diode bridge in the interface circuitry so that devices can be wired without regard for polarity. Signal level are defined as 0±4.5 Vfor "0" and 16±6.5 V for "1". Central interface power maximum is 250 mA and 2 mA per unit. The network cable is required to be mains-rated, with 600 V isolation and at least a 1 mm cross-section, with a maximum drop of 2 volts along the cable (max 300 m). Signal interface is galvanically separated and doesn't need any termination resistors.
Earlier generations of DALI devices stored configuration data in EEPROM, which was problematic due to the limited number of write cycles supported by EEPROMs. In current generations of DALI devices, RAM is used in preference to EEPROM during normal operation, which significantly reduces the number of EEPROM writes and thus extends their lifetimes. This use of RAM, however, is patented and therefore mandates payment of a license fee.
More on DALI.
IEC 60929 and IEC 62386 are technical standards for network-based systems that control lighting in building automation. They were established as a successor for 0-10 V lighting control systems, and as an open standard alternative to Digital Signal Interface (DSI), on which it is based. IEC 60929 is the first version of the standard and will be withdrawn by 23rd of June 2014. Members of the AG DALI are allowed to use the Digital Addressable Lighting Interface (DALI) trademark on devices that are compliant with the current standard. Non AG DALI members can apply for a fee bearing licence.
A DALI network
A DALI network consists of a controller and one or more lighting devices (e.g., electrical ballasts and dimmers) that have DALI interfaces. The controller can monitor and control each light by means of a bi-directional data exchange. The DALI protocol permits devices to be individually addressed and it also incorporates Group and Scene broadcast messages to simultaneously address multiple devices (e.g., "Group 1 goto 100%" or "Recall Scene 1").
Each lighting device is assigned a unique static address in the numeric range 0 to 63, making possible up to 64 devices in a standalone system. Alternatively, DALI can be used as a subsystem via DALI gateways to address more than 64 devices. Data is transferred between controller and devices by means of an asynchronous, half-duplex, serial protocol over a two-wire differential bus, with a fixed data transfer rate of 1200 bit/s.
DALI requires a single pair of wires to form the bus for communication to all devices on a single DALI network. The network can be arranged in a bus or star topology, or a combination of these. The DALI System is not classified as SELV (Separated Extra Low Voltage) and therefore may be run next to the mains cables or within a multi-core cable that includes mains power. The DALI data is transmitted using manchester encoding and has a high signal to noise ratio which enables reliable communications in the presence of a large amount of electrical noise. DALI employs a diode bridge in the interface circuitry so that devices can be wired without regard for polarity. Signal level are defined as 0±4.5 Vfor "0" and 16±6.5 V for "1". Central interface power maximum is 250 mA and 2 mA per unit. The network cable is required to be mains-rated, with 600 V isolation and at least a 1 mm cross-section, with a maximum drop of 2 volts along the cable (max 300 m). Signal interface is galvanically separated and doesn't need any termination resistors.
Earlier generations of DALI devices stored configuration data in EEPROM, which was problematic due to the limited number of write cycles supported by EEPROMs. In current generations of DALI devices, RAM is used in preference to EEPROM during normal operation, which significantly reduces the number of EEPROM writes and thus extends their lifetimes. This use of RAM, however, is patented and therefore mandates payment of a license fee.
More on DALI.