Portable Electric Lighting Fixture

Abstract

A portable electrical luminaire has a supporting body with an upper support end and a lower support end. A lamp base is disposed on the upper support end for accommodating a luminous device. A reflector surrounds the lamp base for indirect space illumination purposes. A connection line is electrically connected to the lamp base and has a connection plug for connection to a power supply system. An electronic control device is configured to automatically limit the electrical power drawn from the power supply system by the luminous device to a predetermined value.

1 . A portable electrical luminaire, comprising: 
 a supporting body having an upper support end and a lower support end;    a lamp base disposed on said upper support end and configured to accommodate a luminous device;    a reflector surrounding said lamp base for indirect space illumination;    an electrical connection between said lamp base and a connection plug for connecting to a power supply system; and    an electronic control device connected and configured to automatically limit an electrical power drawn by said luminous device from the power supply system to a predetermined power value.    
   
   
       2 . The portable electrical luminaire according to  claim 1 , wherein said electronic control device includes first means for detecting an actual current and second means configured to use a comparison of a power value, derived from the actual current and from an actual voltage, with a reference value to limit the actual current such that the electrical power drawn is less than or equal to a maximum power value.  
   
   
       3 . The portable electrical luminaire according to  claim 1 , wherein said electronic control device includes: 
 a sensor for measuring a power parameter;    a comparator having a first comparator input connected to said sensor, a second comparator input for supplying a reference parameter, and a comparator output; and    a controllable switch connected to said comparator output.    
   
   
       4 . The portable electrical luminaire according to  claim 3 , wherein said sensor is a current sensor for measuring an actual current.  
   
   
       5 . The portable electrical luminaire according to  claim 3 , wherein said electronic control device further comprises a voltage divider for measuring an actual voltage.  
   
   
       6 . The portable electrical luminaire according to  claim 3 , wherein said electronic control device includes an electronic amplifier with an amplifier input connected to said sensor and an amplifier output connected to said first comparator input.  
   
   
       7 . The portable electrical luminaire according to  claim 3 , wherein said controllable switch has an output connected to a dimmer circuit for adjusting the electrical power supplied to said luminous means.  
   
   
       8 . The portable electrical luminaire according to  claim 3 , wherein said controllable switch includes a relay for turning off said luminous device when the predetermined power value is reached.  
   
   
       9 . The portable electrical luminaire according to  claim 3 , wherein said luminous device is one of a plurality of luminous devices, and said controllable switch includes a relay for turning off each of said luminous device when the predetermined power value is reached.  
   
   
       10 . The portable electrical luminaire according to  claim 3 , wherein said controllable switch is a power semiconductor.  
   
   
       11 . The portable electrical luminaire according to  claim 10 , wherein said controllable switch is a thyristor or a triac.  
   
   
       12 . The portable electrical luminaire according to  claim 1 , which further comprises an additional luminous device for direct space illumination purposes.  
   
   
       13 . The portable electrical luminaire according to  claim 1 , wherein said electronic control device is disposed in said supporting body, in said lamp base, in said electrical connection line, or in said connection plug.  
   
   
       14 . The portable electrical luminaire according to  claim 1 , wherein said electronic control device is disposed in an adapter configured to be placed onto said connection plug.  
   
   
       15 . The portable electrical luminaire according to  claim 1 , wherein said electronic control device is configured to regulate the electrical power down to a maximum power value of less than 200 W.  
   
   
       16 . The portable electrical luminaire according to  claim 1 , wherein said electronic control device is configured to regulate the electrical power down to a maximum power value of less than 190 W.  
   
   
       17 . The portable electrical luminaire according to  claim 1 , wherein said electronic control device is configured to limit the power by a phase-gating control process or a phase-chopping control process.  
   
   
       18 . An electronic control device for a portable electrical luminaire having a luminous device drawing electrical power from a power supply system, comprising: 
 a sensor for measuring a power parameter related to the electrical luminaire;    a controllable switch connected to said sensor for automatically limiting the electrical power drawn from the power supply system by the luminous device of the luminaire to a predetermined power value.    
   
   
       19 . The electronic control device according to  claim 18 , wherein said sensor is connected to measure an actual current flowing to said luminous device.