Abstract: The charging and discharging circuit includes a filtering circuit, a driving circuit, and a generator circuit. The generator circuit includes a transformer module. An input of the filtering circuit is configured to receive an input voltage, and an output of the filtering circuit is connected to the driving circuit. The driving circuit and the generator circuit include multiple bridge arms, and each of the multiple bridge arms is connected in parallel. The transformer circuit is connected to bridge arms of the generator circuit and is connected to one of bridge arms of the driving circuit. The charging and discharging circuit has a charging state and a discharging state. When the charging and discharging circuit is in the charging state, the driving circuit forms a power factor correction circuit, and the generator circuit forms a resonance circuit.

Abstract: A power drive circuit, includes: a battery pack, a first switch, a voltage adjustment circuit, a first bridge-arm conversion circuit, and a second bridge-arm conversion circuit. A first end of the voltage adjustment circuit is connected to a first end of the battery pack, and a second end of the voltage adjustment circuit is connected to a second end of the battery pack. The first switch is connected to the first end of the battery pack and a third end of the voltage adjustment circuit, and the first bridge-arm conversion circuit and the second bridge-arm conversion circuit are connected in parallel between the second end and the third end of the voltage adjustment circuit. The first bridge-arm conversion circuit is configured to connect to a first electric motor of a vehicle, and the second bridge-arm conversion circuit is configured to connect to a second electric motor of the vehicle.

Abstract: An energy conversion apparatus includes: a first inductor, a first end of the first inductor being connected to a first output end of a battery module; a second inductor, a first end of the second inductor being connected to the first end of the first inductor; a second switch, connected between the first end of the second inductor and a first end of a charging and discharging port; a first two-way H-bridge, one end of the first two-way H-bridge being connected to a second output end of the battery module and a second end of the charging and discharging port, the first two-way H-bridge including a first bridge arm and a second bridge arm that are connected in parallel; and a third switch, connected between the first end of the first inductor and the first end of the charging and discharging port.

Abstract: A magnetic attraction type lens-replaceable eyeglasses, comprising a frame and lenses. A connector for fixedly connecting the lenses to the frame is disposed at a bridge of the frame. The connector is detachably connected to the frame. The connector and the frame are in magnetic attraction cooperation. Fixing pins capable of penetrating through the lenses and used for limiting the swing of the lenses are disposed on the side, in contact with the lenses, of the connector. By using the detachable connector, the lenses are fixed to the frame. By means of magnetic attraction cooperation, the lenses can be relatively easy to replace. Meanwhile, by using a design of positioning pins, it can be ensured that the lenses mounted on the frame will not swing or shift.

Abstract: A magnetic attraction type lens-replaceable eyeglasses, comprising a frame and lenses. A connector for fixedly connecting the lenses to the frame is disposed at a bridge of the frame. The connector is detachably connected to the frame. The connector and the frame are in magnetic attraction cooperation. Fixing pins capable of penetrating through the lenses and used for limiting the swing of the lenses are disposed on the side, in contact with the lenses, of the connector. By using the detachable connector, the lenses are fixed to the frame. By means of magnetic attraction cooperation, the lenses can be relatively easy to replace. Meanwhile, by using a design of positioning pins, it can be ensured that the lenses mounted on the frame will not swing or shift.

Abstract: A phototherapeutic pair of glasses comprising a glasses frame, having a front frame and a pair of glasses legs pivotally connected to a corresponding transverse outer end of the front frame. A plurality of groups of a first physiotherapy LED lamp group are arranged on one side, facing the human face, of the front frame, and the first physiotherapy LED lamp group is distributed along the circumference of an eye. The physiotherapy LED lamp group is arranged on one side, facing the human face, of the front frame of the glasses. The physiotherapy LED lamp group irradiates the periphery of the eye to perform phototherapy on the periphery of the eye during the wearing process such that a beauty effect is achieved. Meanwhile, the wearer is not influenced, and the beauty enjoyment brought by phototherapy can be enjoyed in the entertainment process of watching television and the like.