| 摘要 |
PURPOSE:To prevent use under the state of overload, and to eliminate the failure of cooking by detecting overload by an overload detecting circuit and giving warning. CONSTITUTION:An AC power supply 11 is connected to a full-wave rectifier 12, and an output from the rectifier 12 is conduction-controlled by a thyristor 14 and fed to a motor 13. An overload detecting circuit 102 including an opto- isolator 16, a transistor 17, a capacitor 18 and a comparator 19 detects overload by measuring the number of revolution of the motor 13. With an information circuit 103 containing a capacitor 20, a transistor 21 and an LED 22, the LED 22 is lit and a user is informed of the state of overload when the overload detecting circuit 102 detects overload. |
