Power amplifier for feeding an inductive load having switched transistors

A power amplifier for feeding an inductive load, comprising:

• a first bridge half connected to terminals of a voltage supply;
• a second bridge half connected to said terminals of said voltage supply;
• said first and second bridge halves being connected to said load and said first and second bridge halves being connected with respectively opposite polarities to said terminals so that said first bridge half supplies said load with a first current in a first direction and said second bridge half supplies said load with a second current in a second direction opposite to said first direction;
• said first bridge half having first and second bridge arms therein both connected across said terminals and said second bridge half having first and second bridge arms therein both connected across said terminals;
• each of said bridge arms consisting of a plurality of series circuits connected in parallel and each series circuit comprising a free-running diode and a transistor switch connected in series;
• the transistor switch and the free-running diode in each of the series circuits in the first bridge arm of the first bridge half being connected across said first terminals in a sequence opposite to a sequence in which the transistor switch and the free-running diode in each of said series circuits in the second bridge arm in the first bridge half are connected across said terminals;
• the transistor switch and the free-running diode in each of the series circuits in said first bridge arm of said second bridge half being connected across said terminals in a sequence opposite to a sequence in which the transistor switch and the free-running diode in the series circuits in said second bridge arm of said second bridge half are connected across said terminals;
• said transistor switches and said free-running diodes in each of said first and second bridge arms in each of said first and second bridge halves being linearly arranged;
• and
• a plurality of inductors, an inductor of said plurality being respectively connected between each series circuit of each of said first and second bridge arms of each of said first and second bridge halves and said load, each inductor of said plurality being connected so that it is current-compensated and has an effective inductance only if a non-uniform division of current occurs among the series circuits in a bridge arm to which that inductor is connected.