Power line communication using power factor correction circuits
First Claim
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1. A power factor correction (PFC) circuit, comprising:
- a pulse width modulator (PWM) providing a PWM control signal;
a power MOSFET adapted to control a line current drawn from a power line based on the PWM control signal; and
wherein the PWM control signal is constructed so that both a 50 Hz and 60 Hz said line current is controlled to maintain a desired power factor and a higher frequency current is applied to the power line to implement the transmission of a Power Line Communications (PLC) waveform.
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Abstract
A PFC circuit modulating a power line using pulse width modulation (PWM) to drive a power MOSFET and series inductor across the power line. Since many modern electronic systems include a power factor correction circuit (PFC) that already includes a series inductor and power MOSFET, a PLC is incorporated into a controller to inject a PLC transmit signal into a control loop for the PFC circuit. This can be done using either an analog PFC controller, such as the UCC28517, the UCC2819A, or a digital PFC controller such as based on a TMS320C24xx DSP.
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Citations
8 Claims
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1. A power factor correction (PFC) circuit, comprising:
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a pulse width modulator (PWM) providing a PWM control signal; a power MOSFET adapted to control a line current drawn from a power line based on the PWM control signal; and wherein the PWM control signal is constructed so that both a 50 Hz and 60 Hz said line current is controlled to maintain a desired power factor and a higher frequency current is applied to the power line to implement the transmission of a Power Line Communications (PLC) waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification