Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2000-04-05
2001-10-30
Wong, Don (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S291000, C315S310000, C315S311000
Reexamination Certificate
active
06310446
ABSTRACT:
The invention relates to a method for adjusting at least one operating parameter of an operating unit for electric lamps in accordance with the preamble of patent claim
1
.
TECHNICAL FIELD
It is a well known fact that, because of the tolerances of the individual components, identically produced operating units for electric lamps can have different operating parameters, in particular different output voltages or output powers. It therefore has to be ensured when producing operating units for electric lamps that the lamps to be connected to the operating unit are also actually operated with their nominal data. For this purpose, an adjusting method is carried out in which one or more operating parameters of the operating units are adjusted such that the lamps connected to the operating units can be operated with their nominal data.
For example, a suitably dimensioned resistor is soldered into the operating unit for the purpose of adjusting the operating unit. The value of this adjusting resistor is determined individually for each operating unit during the adjusting method. This adjusting resistor ensures that the lamps connected to the operating unit are operated with their nominal data. Another possibility consists in installing in the operating unit a potentiometer which is set to the suitable value during the adjusting method.
SUMMARY OF THE INVENTION
It is the object of the invention to provide an improved method for adjusting at least one operating parameter of an operating unit for electric lamps, in the case of which there is no need for an adjusting resistor tuned to the respective operating unit.
This object is achieved according to the invention by means of the characterizing features of patent claim
1
. Particularly advantageous embodiments of the invention are described in the subclaims.
During the adjusting method according to the invention, for the purpose of adjusting at least one operating parameter of the operating unit at least one drive parameter which is stored in the operating unit and determines the driving of the voltage transformer is successively varied in a closed loop, and with each traversal of the closed loop a desired value/actual value comparison of the at least one operating parameter to be adjusted is carried out. The closed loop is not left until the actual value of the at least one operating parameter deviates from its desired value by not more than one prescribed absolute value. For this purpose, the adjusting method has the following method steps according to the invention:
a) operating the operating unit with a calibrated load which is connected into the load circuit and connected to the terminals,
b) transmitting at least one control command to the operating unit, which causes the operating unit to set a specific operating state, and which starts the adjusting method for the at least one operating parameter,
c) detecting the actual value of the at least one operating parameter,
d) comparing the actual value of the at least one operating parameter with a prescribed desired value of the at least one operating parameter,
e) determining and storing a correction value or desired value, dependent on the desired value/actual value comparison, for at least one drive parameter, which is stored in the operating unit and determines the driving of the voltage transformer,
f) driving the voltage transformer by using the determined correction value or desired value, stored in the operating unit, of the drive parameter, and
g) repeating steps c) to f) if the actual value of the at least one operating parameter deviates from its desired value by more than a prescribed absolute value.
The at least one operating parameter of the operating unit which is to be adjusted, is advantageously the output voltage or the output power of the operating unit, since these have a direct influence on the operation of the lamps connected to the operating unit. The adjusting method according to the invention is carried out with the aid of an external process control device which is a component of a production device, in particular a testing device for operating units, and which is advantageously connected during the adjusting method via an external interface of the operating unit to the microcontroller, which is arranged in the operating unit and serves to drive the voltage transformer, in order to generate control commands for the operating unit for the purpose of setting the desired operating state.
REFERENCES:
patent: 5039921 (1991-08-01), Kakitani
patent: 5680015 (1997-10-01), Bernitz et al.
patent: 5914572 (1999-06-01), Qian et al.
patent: 6040661 (2000-03-01), Bogdan
patent: 6081077 (2000-06-01), Canova et al.
patent: 6160361 (2000-12-01), Giannopoulos et al.
Bessone Carlo S.
Patent Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
Vo Tuyet T.
Wong Don
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