| 摘要 |
PURPOSE:To control AC electric power, supplied to a load, at need by the quantity of magnetism generated according to power consumption. CONSTITUTION:A semifixed resistance 8 sets electric energy, supplied to a load 1, to 80-90% of the rated power. Since much current flows in the beginning of the start of the load 1, a magnetism generator 4 generates an intense magnetic line of force and a light emitting diode 12 lights brightly to decrease the resistance value of a converting element 13, so that a control signal for increasing electric supply energy is supplied to the gate terminal 10 of a control rectifying element 3. As a result, electric power more than set can be supplied to the load 1. As the current decreases later, the electric supply energy decreases to an initially set value. Namely, only when the load increases, the supply energy is increased at need. |
