2 results about "Class e amplifier" patented technology

This utility model discloses an ultrasonic energy driving circuit, belonging to the technical field of driving circuits for ultrasonic generators. It includes a waveform generating circuit and a matching circuit. The input terminal of the waveform generating circuit is connected to the output terminal of the frequency generating circuit. The waveform generating circuit includes two Class E amplifier circuits. The input terminal of each Class E amplifier circuit is connected to the DC output terminal of the power drive power supply. The output terminal of the waveform generating circuit is connected to the input terminal of the matching circuit, and the output terminal of the matching circuit is connected to the ultrasonic transducer. This utility model can reduce the input bus voltage under the same output power requirements, allowing a small switching power supply to meet the requirements. Furthermore, the size and weight of the heat sink for the field-effect transistor are reduced, and voltage stress can be shared, further reducing heat generation.

The wireless power system includes a magnetic resonant wireless power supply with multiple coupled LC resonators, each driven by a separate radio frequency (RF) generator. The system is modular, allowing for the addition, removal, or rearrangement of resonators. Each RF generator is configured to sense the phase of other RF generators and adjust its own phase to maintain a constant phase difference. Each RF generator includes a Class E amplifier driven by an injection-synchronous oscillator and a low-pass filter that outputs a current sine wave. This RF generator senses the phase of the RF current of other RF generators via an induced voltage and adjusts its own phase based on the combined voltage derived from the voltage and current signals. The system maintains frequency synchronization even in the event of environmental disturbances by adjusting a variable capacitor.