2results about How to "Modulation method is simple" patented technology

The embodiment of the present invention discloses a hybrid multi-level bidirectional split-phase inverter, including a bidirectional inverter circuit and a controller. The bidirectional inverter circuit includes DC, two groups of AC, two DC filter capacitors, two AC filter inductors, two groups of AC filter capacitors, two vertical bridge arms and two horizontal bridge arms. The vertical bridge arm is composed of two power switch tubes connected in series, and the horizontal bridge arm is composed of two power switch tubes connected back to back in series. The controller collects AC and DC side voltage and current signals, flexibly switches between several modes, and stabilizes the output voltage or current. The output voltage of the present invention is five-level in dual live wire mode or single-phase power system, and the output voltage is three-level in single live wire or dual live wire parallel mode. The output equivalent frequency of the present invention is several times the switching frequency, thereby improving the inverter conversion efficiency, reducing the output voltage or current harmonics, and reducing the volume of the filter inductor, so it has a high industrial application value.

This invention relates to the field of animal feed technology, specifically to a herbivore feed and its preparation method. The herbivore feed includes silage, wheat straw, corn flour, brewer's grains, beet pulp, wrapped corn silage, and soybean meal; the silage includes dried apple pomace, wheat straw, and hybrid Napier grass. The preparation method of this herbivore feed is simple. Adding dried apple pomace to the silage to adjust moisture content helps increase the reducing sugar content of the silage, thereby increasing foraging activity in ruminants in southern pastoral areas, mitigating heat stress in ruminants during summer, maintaining stable milk production in dairy cows, and increasing economic benefits.