2results about How to "Lower specification requirements" patented technology

The invention discloses a soil water and fertilizer retention mulching film product using agricultural waste straws as raw materials and a preparation method thereof, the product has raw material sources easier to obtain and a greener technical process than traditional plastic mulching films, a solvent system is composed of eutectic reagents, and the product has the characteristics of being recyclable and environment-friendly. The straw-based mulching film can be naturally formed after being sprayed to the surface layer of soil, and has the effects of inhibiting evaporation of soil moisture and emission of greenhouse gases and enhancing soil fertility.

This application relates to the field of power supply circuit technology, providing a high-voltage rectified and regulated power supply circuit system and a power supply control method. The system includes: a main voltage source for providing a target output voltage; a main switching circuit for converting the target AC output voltage into DC; a DC bus connected to the load; a clamping voltage source for providing a clamping voltage lower than the target output voltage; a clamping switch circuit for converting the AC clamping voltage into DC; an auxiliary voltage source connected to the DC bus; and a control unit for controlling the auxiliary voltage source to pre-charge the power devices in the circuit system before the main switching circuit and the clamping switch circuit are turned on; after pre-charging, power is supplied to the load through the DC bus by controlling the alternating conduction of the main switching circuit and the clamping switch circuit. This application, through the configuration of multiple voltage sources with similar voltage values ​​and an auxiliary voltage source, can establish a power supply system with stable output, low power storage requirements, and low specifications for power devices.