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Real Engineer (not verified)    August 9, 2019 - 4:50PM

In reply to by Peter (not verified)

I'm glad we agreed that true power is not measured in volts. it also implies that only fake power is measured in volts. Or better yet, people who don't have a clue what they talking about use voltage for power measurements.

Would you please cite any reliable sources apart tribal knowledge of good instructors that a boost converter aids in heavy acceleration?

Let's start with physics.
Power is calculated by the following formula.
P=V*I
Where:
P is power measured in kWh
V is voltage measured in Volts
I is a current measured in Ameres

To get higher power, engineers can whether to increase a voltage or a current. Both approaches have pros and cons.

If the voltage is relatively low a huge current is required to get the needed power. That’s not great, because a high current means a large power loss in the control electronics, and it means that really fat wiring needed to carry that current around the car, which makes it heavy.

A very high voltage will require a low current to obtain the desired power. Now, it could be a relatively thin, light wires, which result in less power in the switching electronics. But now, other problems will arise. Such high voltages make insulation difficult (particularly in damp automotive environments), and they’re more of a safety risk. In addition, it’s much more difficult (=expensive) to design electronics that switch at very high voltages. The high voltages tend to break down the components.

The result is a compromise to keep the voltage up and current down (to avoid too much loss of energy in the control electronics, and to keep the wiring light and thin), without making the voltage so high that it causes insulation and safety issues, or makes the control electronics too difficult/expensive.

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