Device for driving electrical load with defined electrical power has switch with two elements for connecting one or other voltage source if power above or below threshold level

摘要

The device has 2 voltage sources of different levels for driving a load via electric circuits and a switch that connects the circuits for defined periods depending on the defined electrical power so the supply voltage is fed to the load (9) as voltage pulses. The switch has two elements, one in each circuit connecting a voltage source to the load. One or other source is connected depending on whether the power is above or below a threshold level. The device has two voltage sources (5,6; 5,7) of different levels for operating a load via electric circuits and a switch (14,15) that connects the circuits for defined periods depending on the defined electrical power so that the supply voltage is fed to the load (9) in the form of voltage pulses. The switch has two elements, one in each circuit connecting a voltage source to the load. One or other source is connected depending on whether the power is above or below a threshold level. Independent claims are also included for the following: a method of driving and electrical load with defined electrical power.