2results about How to "Efficient power transfer" patented technology

The radio frequency front-end circuit comprises: a balun with one end of the primary side connected with the output end of the transmitting amplifier circuit, the other end of the primary side connected with the output end of the receiving amplifier circuit, and one end of the secondary side connected with the antenna interface and grounded; an inductive circuit connected between the input end of the receiving amplifier circuit and the antenna interface; a first capacitor with one end connected between the output end of the transmitting amplifier circuit and one end of the primary side of the balun; a first switch connected between the other end of the first capacitor and the ground; a second capacitor connected between the antenna interface and one end of the secondary side of the balun; a second switch connected between the other end of the second capacitor and the ground; a third capacitor with one end connected between the output end of the transmitting amplifier circuit and the other end of the primary side of the balun; a third switch connected between the other end of the third capacitor and the ground; and a fourth switch with one end connected between the input end of the receiving amplifier circuit and the inductive circuit and the other end grounded.

The utility model relates to a double -layer winding standard clearance electric hoist, include: main beam, driving trolley is used for driving main beam along track movement, driven trolley is used for assisting main beam along track movement, hoisting device, it includes hoisting motor, speed reducer, hoisting support, hoisting drum, steel wire rope and pulley, hoisting motor and speed reducer connect hoisting drum, and the end of steel wire rope is fixed on hoisting drum through rope clamp, and steel wire rope is wound and forms inside and outside two layers on hoisting drum, is first layer steel wire rope and second layer steel wire rope respectively, first layer steel wire rope is located in the inner layer of second layer steel wire rope, and the steel wire rope between first layer steel wire rope and second layer steel wire rope is wound through pulley, the utility model discloses double -layer winding standard clearance electric hoist should, utilize steel wire rope double -layer winding mode, and only one steel wire rope is used in winding part, and overload shaft removes from the original rope end position to the trolley and main beam connection position, and this structure can greatly increase hoisting efficiency.