| 摘要 |
PROBLEM TO BE SOLVED: To provide an exclusive load drive circuit and a heating cooker in which phototriacs belonging to each of the systems do not supply any power source simultaneously to a load even if a computer controlling the phototriacs shows malfunction or trouble.SOLUTION: An exclusive load drive circuit 75 comprises load drive circuits 76a, 76b of a plurality of systems. Each of the load drive circuits 76a, 76b comprises a load 79 driven by an AC power source E, a phototriac 81 for controlling the AC power source E supplied to the load 79, a transistor 83 for driving a light-emitting element 82 of the phototriac 81 and a current limiting resistor 85 connected to a cathode of the light-emitting element 82. A collector of the transistor 83 in a certain one system is connected to a cathode of the light-emitting element 82 in another system. |
