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The Single-Phase AC-DC Conversion Circuit with Power Factor Adjustable

Liming Yang

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Abstract

This design is a single-phase AC-DC conversion circuit with power factor adjustable based on UCC28019 A. MSP430 is selected as the control core. We adopt the high precision 24-bit Σ- Δ ADC to measure the input voltage RMS,the input current RMS,the active power RMS,the power factor and some other parameters.The power-factor correction is accomplished by UCC28019 A. By controlling the digital phase shift circuit to shift the phase of the current feedback signal,the power factor can be set in the range of 0.8 to 1.0. By detecting the output current and voltage,the circuit has the function of 2. 5A overcurrent protection and 36V regulated output.

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What this paper is about

This design is a single-phase AC-DC conversion circuit with power factor adjustable based on UCC28019 A. MSP430 is selected as the control core. We adopt the high precision 24-bit Σ- Δ ADC to measure the input voltage RMS,the input current RMS,the active power RMS,the power factor and some other parameters.The power-factor correction is accomplished by UCC28019 A. By controlling the digital phase shift circuit to shift the phase of the current feedback signal,the power factor can be set in the range of 0.8 to 1.0. By detecting the output current and voltage,the circuit has the function of 2. 5A overcurrent protection and 36V regulated output.

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Available abstract

This design is a single-phase AC-DC conversion circuit with power factor adjustable based on UCC28019 A. MSP430 is selected as the control core. We adopt the high precision 24-bit Σ- Δ ADC to measure the input voltage RMS,the input current RMS,the active power RMS,the power factor and some other parameters.The power-factor correction is accomplished by UCC28019 A. By controlling the digital phase shift circuit to shift the phase of the current feedback signal,the power factor can be set in the range of 0.8 to 1.0. By detecting the output current and voltage,the circuit has the function of 2. 5A overcurrent protection and 36V regulated output.

Key concepts: Power factor, Volt-ampere, Constant power circuit, AC power, Power (physics), Switched-mode power supply, Electrical engineering, Voltage

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