3results about How to "Reduce voltage spikes" patented technology

The invention discloses a voltage regulating circuit and an inverter system, the voltage regulating circuit comprises a first capacitor C1, a voltage dividing branch and a voltage stabilizer D which are connected in parallel between a first node and a second node, a second capacitor C2 and a resistor R0 are connected in parallel between the second node and a third node, and the voltage between the first node and the third node is the total voltage Vs; partial voltage of the total voltage Vs at the first node and the third node is used as driving voltage of the switching tube; a voltage dividing point of the voltage dividing branch is connected to the voltage stabilizer D, and the voltage stabilizer D adjusts the voltage drop of the resistor R0 based on the voltage V2 of the voltage dividing point; the voltage monitoring module is used for monitoring the bus voltage of the inverter system, and when the bus voltage is smaller than a voltage threshold value, the partial voltage of the first node serves as the first driving voltage Vout1; when the bus voltage is larger than the voltage threshold value, the partial voltage of the first node serves as the second driving voltage Vout2, and the first driving voltage Vout1 is larger than the second driving voltage Vout2.

The application discloses a megahertz synchronous rectification system and a wireless charger, and the system comprises a wireless charging receiving side resonant converter and a megahertz synchronous rectification control circuit. The wireless charging receiving side resonant converter comprises a resonant cavity and a half-bridge synchronous rectification module, the input end of the half-bridge synchronous rectification module is connected with the resonant cavity, and the output end is connected with a load. The megahertz synchronous rectification control circuit comprises a signal processing module and a resonant gate drive module, the signal processing module acquires the coil voltage of the resonant cavity and carries out voltage division, comparison and amplification, and outputs a square wave gate drive signal; the resonant gate drive module shapes the square wave gate drive signal into a sine wave gate drive signal. Wherein, the resonant gate drive module introduces an adjustable phase delay, which is used for compensating the fixed phase delay of the signal processing module and the synchronous rectification switch tube, so that the conduction timing of the switch tube is in phase with the resonant cavity current. The application significantly improves the rectification efficiency of the wireless charging receiving end and reduces the system loss.

A direct-current capacitor series-parallel laminated busbar for an SVG power module relates to the technical field of electrical connection and comprises a laminated busbar and a base plate, capacitor mounting holes are distributed on the laminated busbar, a capacitor is mounted in each capacitor mounting hole, and the capacitor mounting holes are communicated with the base plate. The laminated busbar comprises a plurality of layers of thin copper sheets located inside and an insulating film located outside, every two adjacent thin copper sheets are connected, each capacitor installation hole penetrates through the corresponding thin copper sheet, and the capacitors are electrically connected with the thin copper sheets. Two layers of thin copper are laid inside the busbar, so that parasitic inductance of the busbar is remarkably reduced, current can be better distributed, the problems of local overheating and uneven current density are reduced, the phenomenon that peak voltage occurs in the working period of a capacitor is greatly reduced, and the performance and reliability of a whole power electronic system are improved.