793results about How to "High power transmission efficiency" patented technology

An underwater cable arrangement includes systems and method for distributing and / or transferring power and / or data to internal devices and external devices disposed along an underwater cable. Under water coupling systems and underwater electrical devices may be used in the distribution and / or transfer of the power and / or data.

When supplying a power from a base station to a terminal station on radio and a distance from a base station to a terminal station is long, it becomes impossible for the terminal station to rectify the power. The feature of the present invention is found in a wireless communication system in which the peak value and duty ratio of a transmission power are controlled simultaneously, keeping the transmission power of a base station below a fixed value, thereby allowing a voltage to be applied to a diode, which is a component of a rectifier circuit possessed by a terminal station, always in excess of a threshold voltage of the diode, and energy is exchanged between the base station and the terminal station below a limit power.

Power is transmitted from a feeding coil L2 to a receiving coil L2 by magnetic resonance. A power circuit 200 turns ON / OFF switching transistors Q1 and Q2 to feed AC current to an exciting circuit 110, whereby the AC power is fed from an exciting coil L1 to a feeding coil L2. A phase detection circuit 150 sets the switching transistor Q2 of the power circuit 200 as a measurement target and detects the phase difference between source-drain current IDS2 and source-drain voltage VDS2 from the current phase and voltage phase thereof.

According to a first aspect, a secondary side of contactless power transmission apparatus includes: a holding member which is physically separated from a primary side; a magnetic layer; a shield layer for shielding electromagnetic noise; and a heat insulation layer. The secondary coil is a planar coil and supported by the holding member, and at least the magnetic layer is laminated on one side of the planar coil and unified with the planar coil. According to a second aspect, the secondary side of the apparatus includes a plurality of magnetic layers. Each permeability of the magnetic layers is different from each other, and each of the magnetic layers forms a magnetic path with the primary side.

An electrically insulated type of switching element drive circuit supplies an AC voltage via a transformer to a control electrode drive circuit that controls a switching element, with the frequency or amplitude of the AC voltage being modulated in accordance with required on / off operation of the switching element, and with the output AC voltage from the transformer being rectified to obtain a DC supply voltage that is continuously supplied to the control electrode drive circuit. The control electrode drive circuit detects a condition of the AC voltage and controls the switching element accordingly.

A harmonic drive according to the present invention comprises a plurality of internal gears; a band type of flexible gear provided with teeth engaged with each of the internal gears on its outer circumferential surface, the flexible gear having a pitch circumference length shorter than that of said internal gears; and a wave generating part disposed on an inner side of said flexible gear, the wave generating part generating a plurality of harmonic motions by deforming said flexible gear as the wave generating part rotates. Further, said flexible gear is formed integrally to engage with said plurality of internal gears so that the plurality of harmonic motions are overlapped, and one or more of said plurality of internal gears and said flexible gear are formed of profile shifted gears.

The invention relates to a non-contact electrical energy transmission device, particularly a non-contact charging device between an electrical energy emission device and an electrical energy receiving device, so as to realize the information exchange between the electrical energy emission device and the electrical energy reception device. The technical proposal is as follows: the electrical energy emission device and the electrical energy receiving device carry out the electrical energy transmission through coupling two air core coils. Additionally, the device utilizes the RFID technique to realize the information exchange between the electrical energy emission device and the electrical energy receiving device. On one hand, the electrical energy emission device performs the identification of the electrical energy receiving device, that is, the ID identification; on the other hand, the information exchange of the charging state between the electrical energy emission device and the electrical energy reception device is realized, thereby realizing the real-time monitoring of the charging process. Therefore, the non-contact electrical energy transmission device ensures the safe and controllable electrical energy transmission.

A hybrid drive apparatus is provided and enables efficient energy regeneration by the motor generator by separating the power transmission path through which the driving force from the engine is transmitted, from the power transmission path between the motor generator and the drive wheels, and also makes it possible to achieve a variety of driving modes while improving power transmission efficiency. In a hybrid drive apparatus (1) having an engine (10), a motor generator (20), and a planetary gear mechanism (30) in which the output shaft (21) of the motor generator (20) is coupled to a sun gear (S), the output shaft (11) of the engine (10) is coupled to a ring gear (R), and the input shaft (42) of a continuously variable transmission mechanism (40) is coupled to a carrier (C), the hybrid drive apparatus (1) includes a first clutch (C1) that can switch engagement / disengagement between the output shaft (11) of the engine 11 and the ring gear (R), a second clutch (C2) that can switch engagement / disengagement between the carrier (C) and the ring gear (R), and a third clutch (C3) that can switch engagement / disengagement on the input shaft (42) of the transmission mechanism (40).

The invention discloses a power supply transmission method of a high-power wireless induction type power supplier, relating to a power supply module and a power receiving module. A power supply microprocessor is electrically connected with a first driving circuit and a second driving circuit which are respectively provided with two or more than two groups of metal-oxide semi-field-effect transistor arrays connected in parallel; the first driving circuit and the second driving circuit are electrically connected with a power supply resonance circuit with a capacitance array; and the power supply resonance circuit is electrically connected with a power supply coil array, so that the electromagnetic wave energy can be outputted to the power receiving module through frequency conversion and driving power adjustment, and through a main resonance capacitor and a secondary resonance capacitor connected with the power receiving coil array in parallel, and a synchronous rectifier connected withthe main resonance capacitor electrically, the direct-current power is outputted to outside by a high-frequency filter capacitor, a first power supply switch, a low-frequency filter capacitor and a second power supply switch in a filter circuit in sequence. In the power supply transmission method, due to the design of low impedance of a power transmission loop, not only can the high-power wireless power transmission be realized, but also the output power can be adjusted according to the load condition.

An improved wireless transmission system for transferring power over a distance. The system includes a transmitter generating a magnetic field and a receiver for inducing a voltage in response to the magnetic field. In various respects, the receiver is configured to be implanted in a body. The receiver may include a housing enclosing a receiving coil and associated electronic components, a covering around at least a portion of the housing, and at least two wires wrapped around the housing to form a plurality of turns. The covering may be formed of a ferrite material configured to both magnetically shield a respective portion of the internal volume of the housing and redirect incoming magnetic flux from the transmitter to improve efficiency. Methods of use are also provided.

An AC power controller system applies three-phase AC operating power to an induction motor that drives a non-linear mechanical load. A primary low pass filter is connected in series between branch phase conductors and a power controller of the type that uses gate-controlled switching thyristors for controlling power to the motor. KVAR capacitors connected between the power controller and the induction motor phase windings form a secondary low pass filter across the controller output terminals. The primary and secondary low pass filters isolate the power controller and induction motor with respect to spurious noise and harmonics generated by local as well as remote sources, and also improve real power transfer efficiency from the power generating source to the induction motor by transforming the effective impedance of the power source and the induction motor load.

According to a first aspect, a secondary side of contactless power transmission apparatus includes: a holding member which is physically separated from a primary side; a magnetic layer; a shield layer for shielding electromagnetic noise; and a heat insulation layer. The secondary coil is a planar coil and supported by the holding member, and at least the magnetic layer is laminated on one side of the planar coil and unified with the planar coil. According to a second aspect, the secondary side of the apparatus includes a plurality of magnetic layers. Each permeability of the magnetic layers is different from each other, and each of the magnetic layers forms a magnetic path with the primary side.