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公开(公告)号：US10404104B2
公开(公告)日：2019-09-03
申请号：US14671374
申请日：2015-03-27
发明人： Shigeru Takeda , Masayoshi Sugino , Hiroshi Kondo
摘要： In a wireless power supply apparatus, a first unit electrically connected to a power supply and a second unit electrically connected to an electric load. Power transmission is performed wirelessly between the first and second units using a magnetic resonance phenomenon. Each of the units has a resonant amplifier circuit provided with switching means driven by a drive signal, a resonant coil to which a high-frequency signal generated by the resonant amplifier circuit is supplied such that the resonant coil functions as a resonant inductor on the resonant amplifier circuit, and electric storage means electrically connected to the resonant amplifier circuit so as to be capable of charging and discharging power. The second unit includes current detecting means for detecting a current flowing through the storage means, and phase control means for controlling a phase of the drive signal for the switching means based on the detected current.
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公开(公告)号：US09997291B2
公开(公告)日：2018-06-12
申请号：US14039830
申请日：2013-09-27
发明人： Masayoshi Sugino , Katsumi Yuasa , Keisuke Hamasaki , Hiroshi Kondoh , Shigeru Takeda , Yasuyuki Haseo
IPC分类号： H01F37/00 , H01F27/42 , H01F38/00 , H01F38/14 , H02J50/90 , H02J50/50 , H02J50/12 , H02J5/00
摘要： A wireless power supply apparatus includes a power reception coil, an actual load and an auxiliary load. The power reception coil functions as a repeater for receiving electric power in a non-contact manner by magnetic resonance with a power transmission coil to which electric power is supplied from a power supply unit and relaying transfer of the electric power from the power transmission coil. The actual load is connected to the power reception coil and is powered by the electric power received by the power reception coil. The auxiliary load is inserted parallel to the power reception coil and the actual load and forms a closed circuit with the power reception coil when supply of the electric power to the actual load is interrupted to be in an open state.
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公开(公告)号：US09882393B2
公开(公告)日：2018-01-30
申请号：US14672615
申请日：2015-03-30
发明人： Shigeru Takeda , Masayoshi Sugino , Hiroshi Kondo
摘要： A wireless power supply apparatus using magnetic resonance is provided for a linear motion type robot. In the apparatus, a high-frequency signal for foreign matter detection is generated. This signal is different in wavelength and frequency from a high-frequency signal for transmitting power between a power transmission coil and a power reception coil. The wavelength is wavelength λ and the frequency is frequency f. The power transmission coil serves as an apparent antenna of which the long side is set to λ/2. At least either of a wavelength λx or a resonance frequency fx of a resonance wave attributed to the resonance in the antenna is detected when the high-frequency signal is supplied to the antenna. Whether or not foreign matter is present on the power transmission coil is detected based on the wavelength λx or the resonance frequency fx.
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4.发明授权公开(公告)号：US09601265B2
公开(公告)日：2017-03-21
申请号：US14030417
申请日：2013-09-18
CPC分类号： H01F38/14 , H01F27/2804
摘要： A direct drive type system such as a direct drive type robot is provided. This system includes a rail member, a movable member guided by the rail member and movable along the rail member, and an electric motor to drive the movable member. The system includes a transmission coil and a reception coil. The transmission coil has plural transmission coil segments which are planar coils and arranged on and along the rail member. High-frequency power is supplied to the transmission coil from a power source. The reception coil is arranged on the movable member to be opposed to the transmission coil and configured to an area faced with each of the transmission coil segments, wherein the area is smaller than that of each transmission coil segment. The reception coil receives power from the transmission coil without contact by a magnetic resonance. The received power is supplied to the motor.
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公开(公告)号：US10447091B2
公开(公告)日：2019-10-15
申请号：US15867189
申请日：2018-01-10
摘要： A power transmission unit of a wireless power feeding device supplies power to two or more moving bodies wirelessly by using magnetic field resonance. The power transmission unit includes a power transmission coil, a high frequency generation unit, capacitor circuit groups, and a control unit. The capacitor circuit groups have series capacitors connected in series with the power transmission coil and parallel capacitors connected in parallel to the switching elements for generating a high frequency, and the capacitor circuit groups are set together with the power transmission coil so as to have different impedances to each other. The control unit that controls a switch for connecting and disconnecting the capacitor circuit groups according to the number of the moving bodies to which electrical power is supplied from the power transmission coil.
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公开(公告)号：US10790706B2
公开(公告)日：2020-09-29
申请号：US16145521
申请日：2018-09-28
摘要： A wireless power transmission apparatus includes a high-frequency power generator, a power-transmitting electrode, a plurality of power-receiving electrodes, a switchable matching device, a detection circuit and a controller. The high-frequency power generator generates high-frequency power. The power-transmitting electrode is configured to transmit the high-frequency power generated by the high-frequency power generator. Each of the power-receiving electrodes is capable of wirelessly receiving the high-frequency power from the power-transmitting electrode. The matching device is electrically connected with the power-transmitting electrode and includes one or more matching circuits. The detection circuit detects, based on the output of reflected power from the power-transmitting electrode, whether or not the generation of the high-frequency power by the high-frequency power generator and the transmission of the high-frequency power at the power-transmitting electrode match each other. The controller switches the one or more matching circuits of the matching device depending on the detection result of the detection circuit.
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公开(公告)号：US10680462B2
公开(公告)日：2020-06-09
申请号：US16197402
申请日：2018-11-21
摘要： A high frequency oscillator has a high frequency generation part, an oscillation part, a matching unit, rectification element parts and switch parts. The oscillation part oscillates high frequency power generated by the high frequency generation part. The matching unit is arranged between the high frequency generation part and the oscillation part, and has one or more capacitors and matching circuits having difference characteristics so as to perform matching between the high frequency generation part and the oscillation part. The rectification element parts and the matching circuits are arranged in one-to-one correspondence. The rectification element parts rectify high frequency power supplied from the high frequency generation part to the oscillation part. The switch part is connected to the corresponding rectification element part to switch the corresponding capacitor connected to the corresponding matching circuit through the corresponding rectification element part.
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