Circuit device for driving an AC electric load

摘要

The invention relates to a circuit device (1) for driving an AC electric load (3), of the type inserted between a terminal of an AC power supply line and a terminal of the electric load to be driven and including a generator (8) of PWM signals to be transferred to the load. This circuit (1) is an AC/AC converter adapted to power supply the load (3) from any level of the power supply line sinusoid and comprising first and second voltage driven switches (Z1, Z2), the first switch (Z1) to power supply the load (3) and the second switch (Z2) to enable loop-back of the current. The switches (Z1, Z2) always operate in a complementary manner, i.e. when the first switch (Z1) is on, the other (Z2) is off, and vice versa. <IMAGE>