Power frequency converter and associated method

A power frequency converter comprising:

• a plurality of power rectification modules, each power rectification module comprising a plurality of power rectification components for receiving different phases of an alternating current (AC) input signal at a first frequency;
• each power rectification module configured to provide a respective phase of an AC output signal to a load at a second frequency, different than the first frequency, wherein the AC input signal comprises a three phase input signal and the AC output signal comprises a three phase output signal, wherein each power rectification module comprises three power rectification components with each power rectification component of a respective power rectification module associated with a different phase of the three phase input signal and with an output of each power rectification component of a respective power rectification module being combined for the respective phase of the three phase output signal;
• and
• a controller configured to provide control signals to selectively enable the plurality of power rectification modules, wherein the controller is configured to provide the control signals without synchronization to the first frequency.

A power frequency converter comprising:

• a plurality of power rectification modules, each power rectification module comprising a plurality of power rectification components for receiving different phases of an alternating current (AC) input signal at a first frequency;
• each power rectification module configured to provide a respective phase of an AC output signal to a load at a second frequency, different than the first frequency;
• and
• a controller configured to provide control signals to selectively enable the plurality of power rectification modules, wherein the controller is configured to provide the control signals without synchronization to the first frequency, wherein the controller is configured to provide a control signal to a respective power rectification component having positive and negative portions and a transition portion between a positive portion and a negative portion.

An assembly comprising:

• an induction motor;
• a plurality of power rectification modules, each power rectification module comprising a plurality of power rectification components for receiving different phases of a three phase alternating current (AC) input signal at a first frequency;
• each power rectification module configured to provide a respective phase of a three phase AC output signal to the induction motor at a second frequency, different than the first frequency;
• and
• a controller configured to provide control signals to selectively enable the plurality of power rectification modules, wherein the controller is configured to provide the control signals without synchronization to the first frequency,
• wherein the power rectification components are configured to alternately provide positive rectification or negative rectification depending upon the control signal.

A method of providing power frequency conversion, the method comprising:

• receiving an alternating current (AC) input signal at a first frequency with each of a plurality of power rectification modules, each power rectification module comprising a plurality of power rectification components for receiving different phases of the AC input signal;
• providing a respective phase of an AC output signal at a second frequency from each power rectification module to a load, wherein the second frequency is different than the first frequency, wherein providing the AC output signals comprises alternately providing positive rectification or negative rectification with the power rectification components depending upon the control signal;
• and
• selectively enabling the plurality of power rectification modules with control signals that are not synchronized to the first frequency.