Abstract: A spherical electromagnetic machine includes a spherical stator, a plurality of longitudinal slots, a plurality of latitudinal slots, a plurality of longitudinal coils, a plurality of latitudinal coils, a first hemispherical shell rotor, and a second hemispherical shell rotor. The longitudinal slots and latitudinal slots are formed in, and are spaced evenly around, the outer surface. The longitudinal coils are disposed within a different one of the longitudinal slots. The latitudinal coils are disposed within a different one of the latitudinal slots. The first and second hemispherical shell rotors are mounted for rotation relative to the spherical stator body and have magnets on their inner surfaces. A Lorentz force causes movement of the first and second hemispherical shell rotors when electrical current is supplied to one or more of the longitudinal coils or to one or more of the latitudinal coils.

Abstract: A spherical electromagnetic machine includes a spherical stator, a plurality of longitudinal slots, a plurality of latitudinal slots, a plurality of longitudinal coils, a plurality of latitudinal coils, a first hemispherical shell rotor, and a second hemispherical shell rotor. The longitudinal slots and latitudinal slots are formed in, and are spaced evenly around, the outer surface. The longitudinal coils are disposed within a different one of the longitudinal slots. The latitudinal coils are disposed within a different one of the latitudinal slots. The first and second hemispherical shell rotors are mounted for rotation relative to the spherical stator body and have magnets on their inner surfaces. A Lorentz force causes movement of the first and second hemispherical shell rotors when electrical current is supplied to one or more of the longitudinal coils or to one or more of the latitudinal coils.

Abstract: A single-ended primary-inductor converter (SEPIC) circuit has at least a circuit input node and a circuit common node, and includes an inductor, a first coupling capacitor, an isolation transformer, a controllable switch, a second coupling capacitor, and a clamp diode. The inductor is electrically connected in series between the circuit input node and the first coupling capacitor. The first coupling capacitor is connected in series between the inductor and the first primary input terminal. The controllable switch is electrically connected in series between an internal circuit node and the circuit common node, and the internal circuit node is located between the inductor and the first coupling capacitor. The second coupling capacitor is electrically connected in series between the second primary input terminal and the circuit common node. The clamp diode is electrically connected in series between the internal circuit node and the second primary input terminal.

Abstract: A single-ended primary-inductor converter (SEPIC) circuit has at least a circuit input node and a circuit common node, and includes an inductor, a first coupling capacitor, an isolation transformer, a controllable switch, a second coupling capacitor, and a clamp diode. The inductor is electrically connected in series between the circuit input node and the first coupling capacitor. The first coupling capacitor is connected in series between the inductor and the first primary input terminal. The controllable switch is electrically connected in series between an internal circuit node and the circuit common node, and the internal circuit node is located between the inductor and the first coupling capacitor. The second coupling capacitor is electrically connected in series between the second primary input terminal and the circuit common node. The clamp diode is electrically connected in series between the internal circuit node and the second primary input terminal.

Abstract: A single-stage power factor corrected light emitting diode (LED) driver circuit having a circuit input node, a circuit output node, and a circuit common node includes a first inductor, a second inductor, a coupling capacitor, a controllable switch, and an LED string. The first inductor is electrically connected in series between the circuit input node and the coupling capacitor, the second inductor is electrically connected in series between the circuit output node and the circuit common node, the coupling capacitor is electrically connected in series between the first inductor and the circuit output node, the controllable switch is electrically connected in series between a first internal circuit node and the circuit common node, the first internal circuit node located between the first inductor and the coupling capacitor, and the LED string is electrically connected in parallel with only the second inductor.

Abstract: A single-stage power factor corrected light emitting diode (LED) driver circuit having a circuit input node, a circuit output node, and a circuit common node includes a first inductor, a second inductor, a coupling capacitor, a controllable switch, and an LED string. The first inductor is electrically connected in series between the circuit input node and the coupling capacitor, the second inductor is electrically connected in series between the circuit output node and the circuit common node, the coupling capacitor is electrically connected in series between the first inductor and the circuit output node, the controllable switch is electrically connected in series between a first internal circuit node and the circuit common node, the first internal circuit node located between the first inductor and the coupling capacitor, and the LED string is electrically connected in parallel with only the second inductor.