There is provided a power supply device configured to boost an input voltage to output an output voltage, the power supply device including: an oscillator circuit configured to receive the input voltage and to output an oscillation signal; a step-up circuit configured to output a boost voltage based on the oscillation signal; a first hysteresis comparator and a second hysteresis comparator configured to compare boost voltages with threshold values; a first switch that is connected between the oscillator circuit and the step-up circuit and that is controlled based on a comparison result of the first hysteresis comparator; and a second switch that is connected to an output terminal configured to output the output voltage and that is controlled based on a comparison result of the second hysteresis comparator.

A half bridge DC-DC converter device includes a primary circuit and a secondary circuit, which include separate windings that are disposed around a magnetic core. The first circuit includes two switches and a drive circuit to turn the two switches on and off in an alternating fashion. The primary circuit further includes two thermal regulating components to regulate the current at the base of the two switches over a range of operating temperatures. The regulation of base current over a range of different operating temperatures results in the half bridge converter device being efficient and maintaining a stable switching frequency over the operational temperature range.

A half bridge DC-DC converter device includes a primary circuit and a secondary circuit, which include separate windings that are disposed around a magnetic core. The first circuit includes two switches and a drive circuit to turn the two switches on and off in an alternating fashion. The primary circuit further includes two thermal regulating components to regulate the current at the base of the two switches over a range of operating temperatures. The regulation of base current over a range of different operating temperatures results in the half bridge converter device being efficient and maintaining a stable switching frequency over the operational temperature range.

Some embodiments include a pulsing power supply comprising a power supply and a transformer comprising: a transformer core; a primary winding wrapped around a portion of the transformer core, the primary winding having a first lead and a second lead; and a secondary winding wrapped around a portion of the transformer core. The pulsing power supply may also include a first switch electrically connected with the first lead of the primary winding and the power supply; and a second switch electrically connected with the second lead of the primary winding and the power supply, wherein the first switch and the second switch are opened and closed at different time intervals. The pulsing power supply may also include a pulsing output electrically coupled with the secondary winding of the transformer that outputs pulses having a voltage greater than about 2 kV and with pulse frequencies greater than 1 kHz.

Some embodiments include a pulsing power supply comprising a power supply and a transformer comprising: a transformer core; a primary winding wrapped around a portion of the transformer core, the primary winding having a first lead and a second lead; and a secondary winding wrapped around a portion of the transformer core. The pulsing power supply may also include a first switch electrically connected with the first lead of the primary winding and the power supply; and a second switch electrically connected with the second lead of the primary winding and the power supply, wherein the first switch and the second switch are opened and closed at different time intervals. The pulsing power supply may also include a pulsing output electrically coupled with the secondary winding of the transformer that outputs pulses having a voltage greater than about 2 kV and with pulse frequencies greater than 1 kHz.

A DC-DC converter includes: an transformer having a primary winding and a secondary winding magnetically coupled to the primary winding; a power oscillator applying an oscillating signal to the primary to transmit a power signal to the secondary winding; a rectifier connected to the secondary winding of the transformer to obtain an output DC voltage by rectification of the power signal; comparison circuitry to generate an error signal representing a difference between the output DC voltage and a reference voltage; a transmitter connected to the secondary winding of the transformer to apply an amplitude modulation to the power signal at the secondary winding of the transformer in response to the error signal to thereby produce an amplitude modulated signal at the primary winding; and a receiver and control circuit connected to the primary winding to control an amplitude of the oscillating signal as a function of the amplitude modulated signal.

A DC-DC converter includes: an transformer having a primary winding and a secondary winding magnetically coupled to the primary winding; a power oscillator applying an oscillating signal to the primary to transmit a power signal to the secondary winding; a rectifier connected to the secondary winding of the transformer to obtain an output DC voltage by rectification of the power signal; comparison circuitry to generate an error signal representing a difference between the output DC voltage and a reference voltage; a transmitter connected to the secondary winding of the transformer to apply an amplitude modulation to the power signal at the secondary winding of the transformer in response to the error signal to thereby produce an amplitude modulated signal at the primary winding; and a receiver and control circuit connected to the primary winding to control an amplitude of the oscillating signal as a function of the amplitude modulated signal.

The present disclosure provides a circuits for harvesting energy from an energy source. The energy source may have a first and a second potential of an input voltage. The circuits may further comprise one or more of a charging capacitor, transformers, transistors, or diodes. The circuits may be used for harvesting energy from thermoelectric generators.

The present disclosure provides a circuits for harvesting energy from an energy source. The energy source may have a first and a second potential of an input voltage. The circuits may further comprise one or more of a charging capacitor, transformers, transistors, or diodes. The circuits may be used for harvesting energy from thermoelectric generators.

The present invention relates to a magnetic resonance charging system comprising a voltage source (1) and an inverter (2), said inverter (2) comprising a parallel LC inverter resonant circuit (3) and at least one charging plate (4), characterized in that said inverter resonant circuit (3) comprises a capacitor (32) connected in parallel to a primary winding (33) of said at least one charging plate (4) and in that said inverter (2) further comprises: a measuring means (5) for measuring the instantaneous voltage across said inverter resonant circuit (3), a phase shifter (6) connected to said measuring means (5) an excitation means (7) connected to the phase shifter (6), able to inject energy from said voltage source (1) into the inverter resonant circuit (3) during each cycle observed by the measuring means (5), with a phase shift indicated by the phase shifter (6).

The present invention also relates to a method of operating a charging system according to the invention.