DE10035558A1 - Changing AC mains voltage across incandescent, fluorescent or gas discharge lamps, involves open-circuiting low resistance bypass in parallel with choke - Google Patents

Abstract

A low resistance bypass (S-R) is connected in parallel with a choke coil (T). The bypass is opened, e.g. after ignition of a fluorescent lamp. This reduces the voltage across the lamp, without interrupting the supply.

Description

The facility is combined in one unit and is called LOM = light optimization module.

1. Technical field

Lighting systems with incandescent lamps, with fluorescent lamps, with discharge lamps (sodium vapor lp., mercury vapor lp. Metal halide vapor lp.), In which to save energy Lamp voltage is reduced, e.g. B. after igniting one Fluorescent lamp.

2. Known state of the art

• 1. 2.1 dimmable lamp ballasts
• 2. 2.2 lamp ballast transformers with special sub Refraction-free switching (patent DE 38 23 024 A1).
• 3. 2.3 for fluorescent lamps:
  Dimmer Memolux; the device is replaced with the existing starter.
  Dimmer-MEMOLUX is distributed by the company
  TWC electronic GmbH
  Hutweide 10,
  91220 Schnaittach-Laiperdorf
  The patent no. is not known to me.

3. The problem underlying the invention

Fluorescent lamps or discharge lamps need for that Ignite (for the start) a certain AC voltage, z. B. 230 V / 50 Hz in front of the lamp choke (= supply voltage). If the lamp has ignited, the connection can be made for operation voltage can be reduced, e.g. B. in fluorescent lamps on 185. , , 180 V. The voltage drop must be absolute Uninterrupted, otherwise short Interruption (already in the millisecond range) the lamp immediately goes out.

task

To create a facility that

• a) reliably the connection voltage (e.g. 230 V / 50 Hz) lighting the lamp uninterrupted on a be agreed value (e.g. 185 V / 50 Hz) reduced.
• b) represents a cost-effective / compatible solution.

4. The invention for protection in the claims is desired

The lamp circuit is preceded by the device - how under 7. Specifically described - d. H. the facility (LOM = Light optimization module) is between the lamp circuit and connection voltage (e.g. 230 V / 50 Hz) switched. While the lamp ignition process is in the facility (LOM) Component (choke coil) bridges that the voltage Degradation causes. The facility (LOM) determines when the lamp has ignited and then opens after one short delay (approx. 3 sec.) bridging what the immediate reduction of the voltage on the lamp circuit has the consequence (e.g. from 230 V / 50 Hz to approx. 185 V / 50 Hz).

Principle of operation

There is a bridging (low resistance) over a component (Choke coil) canceled, which reduces the voltage Interruption-free.

So: there is no changeover (e.g. of transformer windings) made, but there is a bridging of a choke coil open (open-switched).  

5. In what way is the subject of the invention commercial applicable

The facility (LOM = light optimization module) is for Energy saving in lighting systems determined.

The energy saving is achieved by reducing the lamp voltage. The following economic advantages are achieved:

• 1. Reduction of the existing lighting connection power (kW) and thus energy costs by approx. 30%!
  Note:
  The loss of luminous flux caused by the reduction of the lamp voltage of about 14% is hardly noticed by the human eye. Since most lighting systems emit a higher illuminance than according to DIN u. ASR is required, the loss of illuminance can be neglected. Where this is not the case, the loss of illuminance can be compensated for by using significantly more economical lamps (than standard lamps). The built-in device (LOM) already partially compensates for the loss of illuminance by reducing the ambient temperature of the lamp by 10. , , 20 ° C is reduced, which results in an increase in luminous flux / illuminance of about 10%.
• 2. Reduction of the power price in the electricity contract for less decrease in active power / work and blind Power / -work.
• 3. Increase the lamp burning time by about 30%; that means a reduction of 30% in each case:
  • 1. the lamp cost
  • 2. the lamp replacement costs
  • 3. Lamp scrap costs

6. Advantageous effect of the invention with reference to the prior art

• a) The device (LOM) is in the light in the simplest Way installed and connected. So are at one existing lighting system line installation no changes required.
• b) The facility (LOM) consists of components that none mechanical wear, which is a long time Have lifespan.
• c) The cost of the facility (LOM) and its installation are Cheap; they will pay for themselves in 2 years at the latest.

7. Explain the invention with reference to the drawing Mechanical construction

The invention (LOM) consists of the encapsulated choke coil (T) and a likewise encapsulated switching unit (A-R-S); in the whole a compact encapsulated unit that is very good in can accommodate every lamp.

Installation u. electrical connection

The device (LOM) is built into the luminaire, namely for z. B. 1 NL lamp = 1 device, 2 NL lamps = 2 on directions. , ,

The device (LOM) is in front of the luminaire connection in the Live conductor (L e.g. 230 V / 50 Hz) switched; because for an additional terminal block for 1 to several in directions (for 1 to more lamps).  

Description of the circuit based on the drawing

When applying the mains voltage (e.g. 230 V / 50 Hz) to the on direction (LOM) is the choke coil (T) through the bridge S (Triac) u. Resistor (R-low impedance) short-circuited; the Ignition current of the lamp / lamp flows through S u. R.

The measuring circuit (A) sets the back when the lamp is lit. course of the current is fixed (I. Zünd → becomes I. operation) and initiated the opening of the triac (S) and thus the uninterrupted one Interposition of the choke coil (T); with that the Luminaire input voltage 230 V / 50 Hz around the voltage drop reduced at the choke (T) of the device (LOM) (e.g. from 230 V / 50 Hz to approx. 185. , 180 V / 50 Hz).

This switching state is now maintained until to switch off the mains voltage at the input of the device (LOM).

When the mains voltage is reapplied, the circuit Repeat the procedure as described above.  

The facility is combined in one unit and is called LOM = light optimization module.

drawings Schematic layout Drawing 01

A = measuring circuit
R = measuring resistance
S = electrical switch (triac)
T = choke coil

Schematic diagram Drawing 02

Example:
NL lamp 1 × 58 W with built-in LOM

K = compensation capacitor

LOM:
A = circuit
R = resistance
S = electron. Switch (triac)
T = choke coil

When switching on (connecting to the AC network) the on Direction is almost at the entrance and exit of the facility the same voltage level at (U1 ≈ U2): almost 100% flow of the current through the low-resistance bypass (ΔU ≈ 0).

When the bypass (SR) is opened by switching off the triac (S), the current (100%) flows through the inductor (T) and the voltage level behind the inductor (U2) is reduced by the voltage drop across the inductor (ΔU) compared to An input voltage (U1).

U2 = U1 - ΔU.

Since not switched but only a bypass (bypass) is opened, the voltage in this bypass circuit Reduction absolutely uninterrupted.

annotation

Reference is made to the patent DE 38 23 024 A1. In the be suitable device for reducing a voltage per conductor (L1-L2-L3) with 3 switching contacts autotransformer taps switched.

Claims (1)

Device for switching in the AC network of a voltage on incandescent / fluorescent / discharge lamps, characterized in that a low-resistance bypass (SR) is connected via a choke coil (T), which is opened - for. B. after the ignition of a fluorescent lamp - and thus an uninterrupted reduction in lamp voltage is achieved.