Electrical Engineering › Section I · Sinusoidal waveforms and phasors › Topic I.6
Frequency response, average power, and power factor
Turn up the frequency and an inductor fights the current harder while a capacitor lets it through more easily. Look at the power instead, and only the resistance actually consumes any. These two ideas explain filters, motors and why utilities charge large customers for a poor power factor.
In this topic
- Reactance depends on frequency
- The three elements against frequency
- Low and high frequency limits
- Worked example: frequencies for given reactances
- Real components at high frequency
- Average power
- Power in R, L and C
- Power factor
- Worked example: power from two sinusoids
- Worked example: a motor's power factor
- Common mistakes to avoid
- Key takeaways
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