Bus converter current ripple reduction

A circuit, comprising:

• a first resonant power converter, including:
• a first periodic signal generator coupled to receive a direct-current (DC) power input and a first phase signal,
• a first resonant network coupled to receive a first periodic voltage from the first periodic signal generator wherein the first periodic voltage includes a first voltage for a first time period and a second voltage for a second time period, and
• a first rectifier coupled to receive a first sinusoidal output current from the first resonant network;
• a second resonant power converter, including:
• a second periodic signal generator coupled to receive the DC power input and a second phase signal,
• a second resonant network coupled to receive a second periodic voltage from the second periodic signal generator wherein the second periodic voltage includes a first voltage for a first time period and a second voltage for a second time period, and
• a second rectifier coupled to receive a second sinusoidal output current from the second resonant network;
• a third resonant power converter, including:
• a third periodic signal generator coupled to receive the DC power input and a third phase signal,
• a third resonant network coupled to receive a third periodic voltage from the third periodic signal generator wherein the third periodic voltage includes a first voltage for a first time period and a second voltage for a second time period, and
• a third rectifier coupled to receive a third sinusoidal output current from the third resonant network;
• and
• a current summer coupled to receive a first rectified current from the first rectifier, a second rectified current from the second rectifier, and a third rectified current from the third rectifier
• wherein the first, second, and third rectifiers each include a first second diode arranged in a voltage doubler configuration.

A system, comprising:

• a controller for generating first, second, and third phase signals;
• a first resonant power converter, including,
• a first periodic signal generator for generating a first periodic voltage in response to a direct-current (DC) power input and the first phase signal wherein the first periodic voltage includes a first voltage for a first time period and a second voltage for a second time period,
• a first resonant network for generating a first sinusoidal output current in response to the first periodic voltage, and
• a first rectifier for rectifying the first sinusoidal output current to generate a first rectified current;
• a second resonant power converter, including,
• a second periodic signal generator for generating a second periodic voltage in response to the DC power input and the second phase signal wherein the second periodic voltage includes a first voltage for a first time period and a second voltage for a second time period,
• a second resonant network for generating a second sinusoidal output current in response to the second periodic voltage, and
• a second rectifier for rectifying the second sinusoidal output current to generate a second rectified current;
• a third resonant power converter, including,
• a third periodic signal generator for generating a third periodic voltage in response to the DC power input and the third phase signal wherein the third periodic voltage includes a first voltage for a first time period and a second voltage for a second time period,
• a third resonant network for generating a third sinusoidal output current in response to the third periodic voltage, and
• a third rectifier for rectifying the third sinusoidal output current to generate a third rectified current;
• and
• a current summer for generating a total output current in response to summing the first, second, and third rectified currents;
• wherein the first, second, and third rectifiers each include a first, a second diode, a first capacitor, and a second capacitor arranged in a voltage doubler configuration.

A method comprising:

• generating a first periodic voltage in response to a direct-current (DC) power input and a first phase signal wherein the first periodic voltage includes a first voltage for a first time period and a second voltage for a second time period;
• generating a first sinusoidal output current in response to the first periodic voltage;
• rectifying the first sinusoidal output current to generate a first rectified current;
• generating a second periodic voltage in response to the DC power input and a second phase signal wherein the second periodic voltage includes a first voltage for a first time period and a second voltage for a second time period;
• generating a second sinusoidal output current in response to the second periodic voltage;
• rectifying the second sinusoidal output current to generate a second rectified current;
• generating a third periodic voltage in response to the DC power input and a third phase signal wherein the third periodic voltage includes a first voltage for a first time period and a second voltage for a second time period;
• generating a third sinusoidal output current in response to the third periodic voltage;
• rectifying the third sinusoidal output current to generate a third rectified current;
• generating a total output current in response to summing the first, second, and third rectified currents;
• and
• doubling an output voltage derived from the total output current using a voltage doubler circuit.