IH調理器のしくみ／How Induction Cooking Appliances Work
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DENJIRO: Let’s try boiling some
DENJIRO: Let’s try boiling some water! But we’re not going to use fire. We’re going to use this device right here. Here we go.
CAPTION: Why did the water boil?
DENJIRO: Strange, no? The secret lies in the magnets embedded in the rotating disc. North poles and south poles are placed in an alternating sequence. If we sprinkle metal powder on top, we see that the magnetic field changes.
Now, I’m going to bring a coil attached to a light bulb up to the spinning magnets. The light bulb turned on. Since the magnetic field going through the coil changes, electromagnetic induction occurs, and electricity is generated. In the experiment we did earlier, electricity ran through the copper plate beneath the container, just like with the coil we just saw, and the water boiled because of the heat that was generated.
This is the same mechanism used in an induction cooktop. Let’s open one up and look inside. Induction cooking appliances use a coil and not magnets. When electricity runs through this coil, magnetism is generated. The electricity is an alternating current where the positive and negative alternate. Let me place a coil with light bulbs attached to it on top of an induction cooktop. Watch what happens. The light bulbs turned on. By varying the current running through the coil, the magnetic force changes. An electrical current was produced due to electromagnetic induction. When you cook with an induction cooktop, an electrical current runs through the bottom of the metal cooking utensil on it. That’s how heat is produced.
NARRATOR: Some induction cooktops automatically turn off if you don’t have anything placed on it. Others have a temperature sensor that prevents heating an empty pot.
DENJIRO: I hope energy will bring you all happiness. Our magic word is "Happy Energy!”
CAPTION: Why did the water boil?
DENJIRO: Strange, no? The secret lies in the magnets embedded in the rotating disc. North poles and south poles are placed in an alternating sequence. If we sprinkle metal powder on top, we see that the magnetic field changes.
Now, I’m going to bring a coil attached to a light bulb up to the spinning magnets. The light bulb turned on. Since the magnetic field going through the coil changes, electromagnetic induction occurs, and electricity is generated. In the experiment we did earlier, electricity ran through the copper plate beneath the container, just like with the coil we just saw, and the water boiled because of the heat that was generated.
This is the same mechanism used in an induction cooktop. Let’s open one up and look inside. Induction cooking appliances use a coil and not magnets. When electricity runs through this coil, magnetism is generated. The electricity is an alternating current where the positive and negative alternate. Let me place a coil with light bulbs attached to it on top of an induction cooktop. Watch what happens. The light bulbs turned on. By varying the current running through the coil, the magnetic force changes. An electrical current was produced due to electromagnetic induction. When you cook with an induction cooktop, an electrical current runs through the bottom of the metal cooking utensil on it. That’s how heat is produced.
NARRATOR: Some induction cooktops automatically turn off if you don’t have anything placed on it. Others have a temperature sensor that prevents heating an empty pot.
DENJIRO: I hope energy will bring you all happiness. Our magic word is "Happy Energy!”
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