乾電池1本から100Vを作る

Summary

このビデオでは、1.5Vの乾電池から100Vの電圧を生み出すブーストコンバータの制作過程を紹介しています。有名なコッククロフト・ウォルトン回路の代わりに、シンプルなブーストコンバータを使用し、パワーMOSFET、ダイオード、コンデンサーを活用します。原理説明から実際のPCB製作、そして実験による検証まで、一連の流れが詳しく解説されています。また、乾電池の電圧を5Vに昇圧する村田製作所のモジュールの使用や、複数のブーストコンバータモジュールをカスケード接続して高電圧を得る工夫が紹介されています。最終的には、単一の乾電池で150Vを超える電圧を実現し、その危険性と電圧が負荷によってどのように変動するかについても触れられています。

Takeaways

• 😀 They will make a 100V dry cell battery using power electronics
• 👷‍♂️ They will use a boost converter circuit to step up the voltage
• 🔌 The circuit only needs a single 1.5V AA battery as input
• ⚡️ The battery voltage is stepped up using an inductor and capacitor
• 🤔 Driving the MOSFET switch is challenging with only 1.5V input
• 🙌 Found a Murata module to boost 1.5V to 5V for MOSFET control
• ⚙️ Connected multiple boost converter modules in series to multiply voltage
• 🔋 Made a 150V 'dry cell battery' from a single AA battery
• 📉 Voltage drops under load due to no feedback control
• 💡Possibility to boost voltage further with more batteries in parallel

Q & A

What is the goal of the project in the video?

The goal is to create a 100V dry cell battery using only a single 1.5V AA battery.

What circuit configuration is used to boost the voltage?

A boost converter circuit configuration consisting of an inductor, switch, diode and capacitor is used.

How does the boost converter work to increase the voltage?

It works by storing energy in the inductor when the switch is closed, and then transferring that energy to the capacitor when the switch is opened, boosting the voltage.

Why was the Murata power module used?

It was used to boost the 1.5V battery voltage to 5V to provide sufficient voltage to drive the MOSFET switches.

How was a 100V output achieved?

By connecting multiple boost converter modules together vertically in cascade to achieve a high voltage gain.

Why did the output voltage drop under load?

Because there was no feedback control, the boost converters moved into discontinuous mode, and the battery voltage sagged under the high load current.

What was the maximum output current capability?

Only about 1A could be drawn before the output voltage dropped significantly due to battery limitations.

What improvements could be made?

Add voltage feedback control, parallel more batteries, add more cascade stages, and optimize the circuits for higher load currents.

What was learned from this project?

That while voltage multiplier circuits can generate high voltages easily, getting them to work properly under load with feedback and control is more difficult.

What future applications are possible?

With improvements, this circuit technique could generate voltages up to 3kV for specialized applications.