Abstract: An apparatus for delivering AC power to an AC load may include a plurality of inverters to receive direct current (DC) power from a respective DC power source and respectively provide AC power to an AC load. The apparatus may further include a first controller to generate a first control signal based on total AC current and total AC voltage being delivered to the AC load by the plurality of inverters. The apparatus may further include a plurality of secondary controllers to each receive the first control signal and each produce a respective secondary control signal based on the first control signal. The respective secondary control signal for each of the plurality of secondary controllers is configured to control a corresponding one of the plurality of inverters to provide a portion of the AC power.

Abstract: An apparatus to deliver an alternating current (AC) power may include a controller having a processor and a memory. The apparatus may also include a plurality of power inverters in communication with the controller. Each power inverter may be configured to convert direct-current (DC) power into the (AC) power. Each of the plurality of power inverters may be configured to be controlled by the controller to generate AC power below at least one predetermined operating threshold. The plurality of power inverters may be configured to combine AC power generated by each of the plurality of power inverters, such that the combined AC power is delivered to a common AC load above the predetermined operating threshold. The apparatus may be arranged and operated according to a ratio of FMA=Fr/N, where Fr=fs/fl, fs is the switching frequency of the plurality of power inverters, fl is the frequency of the common AC load, and N is the number of power inverters of the apparatus.

Abstract: A power inverter may include a transformer serving as an isolation barrier. The power inverter may include a first controller on one side of the isolation barrier. The first controller may encode the frequency of an input voltage of the transformer with one or more operating conditions of a direct current power supply electrically coupled to the inverter. As second controller on the other side of the isolation barrier may determine a frequency associated with an output voltage of the transformer. The second controller may decode the frequency associated with the output voltage of the transformer to determine the encoded operating conditions.

Abstract: A power converter includes a reverse-recovery avoidance scheme. The power converter may include deliver current from a direct current (DC) power source to an alternating current (AC) load. A first switch and second switch of the power converter may be operated to supply the AC load with positive current respective to the AC load from the DC power source. A third and fourth switch of the power converter may be operated to supply the AC load with negative current respective to the AC load from the DC power source. A first diode may be electrically coupled in series with the second switch and second diode may be electrically coupled in parallel with the first diode and the second switch. The second diode may conduct the positive current when the first switch is off and the second switch is on. A third diode may be electrically coupled in series with the fourth switch and a fourth diode may be electrically coupled in parallel with the third diode and the fourth switch.

Abstract: An electronics module docking system includes docking member removably coupled to a photovoltaic module. The docking system includes a first connector port electrically coupled to one or more photovoltaic cells of the photovoltaic module. The photovoltaic module is selectively coupleable to the docking member. The docking system includes a housing to enclose an electronics module. The housing may include second connector port that is selectively engageable to the power electronics module. The power electronics module and the photovoltaic cells are electrically coupled to one another upon selective engagement of the connector ports. The inverter housing is receivable by and removably coupleable to the docking member allowing the inverter housing to be removably coupleable to the photovoltaic module.

Abstract: An energy recovery circuit receives and stores energy associated with switching transitions in a power converter having a first switch and a second switch configured to be operated to selectively apply a voltage source to an output load. The energy recovery circuit includes an inductive element, a diode, and a capacitive element. The inductive element receives at least a portion of electrical current flowing through one of the first switch and the second switch. The at least a portion of the electrical current flows through the diode to charge the capacitive element with a voltage. The energy recovery circuit includes a recovery power converter to transfer the voltage from the capacitor.