Omron Corporation

Toshiyuki Zaitsu

Goro Nakao

Yusuke Kawai

Atsushi Nomura

Takeshi Kiribuchi

Takeshi Ashida

Masashi Doi

Takeshi Uematsu

Shingo Nagaoka

Yutaro Okuno

Sadaharu Morishita

Hiroki Ishibashi

A power transmission device of the non-contact feeding device includes the transmission coil that supplies power to a power receiving device, a power supply circuit that supplies AC power obtained by boosting or stepping down the input voltage to the transmission coil, a voltage detection circuit that measures the voltage input to the power supply circuit, and a control circuit that controls a degree of boosting or step-down with respect to the input voltage by the power supply circuit according to the input voltage measured. The power receiving device includes a resonance circuit including a receiving coil that receives the power from the power transmission device and a resonance capacitor that resonates with the receiving coil according to the power from the power transmission device and a rectifier circuit that rectifies the power output from the resonance circuit.

System and methods of a non-contact feeding device providing constant output voltage to a power receiving device

A power receiver device of a non-contact power feeding device includes a plurality of resonance circuits that receive power from a power transmitter device, a voltage detection circuit that detects an output voltage from the plurality of resonance circuits, and a control circuit. Receiver coils of the plurality of resonance circuits are arranged so as to be electromagnetically coupled to each other. At least one of resonance circuits includes a variable capacitance circuit that is connected to the receiver coil of the resonance circuit and is regulatable in capacitance. The control circuit regulates the capacitance of the variable capacitance circuit in accordance with the output voltage.

Non-contact power feeding device

A DC power supply device capable of preventing voltage oscillation of a power supply path to a motor control device is provided. The DC power supply device includes a power supply unit (such as an AC/DC converter) that outputs a DC and a filter circuit that detects a voltage fluctuation of the DC output from the power supply unit and adjusts impedance of own circuit such that the voltage fluctuation of the DC is prevented based on a detection result.

DC power supply device and servo DC power supply system

A servo direct-current feeder system can reduce an oscillating voltage across a power feeding path. The servo direct-current feeder system includes a direct-current power supply, a plurality of motor controllers that each control a servomotor, and a power feeding path that distributes power from the direct-current power supply to the plurality of motor controllers. Each of the plurality of motor controllers includes a current control loop unit that controls a current flowing through the servomotor. The current loop unit includes a current control loop including a notch filter having a center frequency corresponding to a frequency to occur from an oscillating voltage across the power feeding path.

Servo DC power supply system and motor control device

A contactless power transmission apparatus includes a transmitter that includes a transmitter coil that supplies electric power to a receiver and a power supply circuit that supplies alternating current power to the transmitter coil. The receiver includes a resonant circuit including a receiver coil that receives electric power from the transmitter and a resonant capacitor connected in series to the receiver coil, a rectifier circuit that rectifies electric power output from the resonant circuit, and a coil connected in parallel to the resonant circuit between the resonant circuit and the rectifier circuit.

Contactless power transmission apparatus

A power transmission devicefor a non-contact power supply devicehas a transmission coiland a power supply circuitthat supplies, to the transmission coil, AC power having a switching frequency at which the transmission coildoes not resonate. In addition, a power reception devicefor the non-contact power supply devicehas: a resonance circuitthat has a reception coiland a resonance capacitorresonating in parallel and a first coilconnected in series or parallel to the reception coil; and a coilconnected in series to the reception coil

Non-contact power supply device capable of performing constant voltage output operation

A power receiving deviceof a non-contact power supply devicehas: a resonant circuithaving a receiving coilfor receiving power from a power transmission device; and a rectifier circuitfor rectifying power output from the resonant circuit. The power transmission devicehas: a transmission coilfor supplying power to the power receiving device; a power supply circuitfor supplying AC power having an adjustable switching frequency to the power transmission coil; and a control circuitthat stops the power supply from the power supply circuitto the transmission coilwhen the non-contact power supply devicedoes not perform a constant voltage output operation even if the switching frequency is changed over a predetermined frequency range.

Non-contact power supply device and method for abnormal stop

A power receiver device a noncontact power supply apparatus short-circuits a resonance suppressing coil provided so as to be electromagnetically coupled to a receiver coil and notifies a power transmitter device of an output voltage abnormality when a measured value of output voltage becomes equal to or greater than an upper limit threshold, the measured value of output voltage being obtained by rectifying power received via a resonance circuit including a receiver coil configured to receive power from a transmitter coil of the power transmitter device and a resonance capacitor connected in parallel with the receiver coil. Upon receipt of the notification of the output voltage abnormality, the power transmitter device changes at least one of a voltage and switching frequency of AC power applied to the transmitter coil.

Noncontact power supply apparatus

A contactless power transmission apparatus includes a receiver that includes a resonant circuit that receives electric power from a transmitter. The receiver causes, in response to a measurement value of an output voltage of electric power output from the resonant circuit being out of a predetermined allowable range of voltages, a short circuit to short-circuit the resonant circuit and transmits determination information indicating that the contactless power transmission apparatus is not outputting a constant voltage. In response to the determination information, the transmitter in the contactless power transmission apparatus detects a switching frequency of alternating current power to be supplied to a transmitter coil from a power supply circuit at which the contactless power transmission apparatus outputs a constant voltage in accordance with a measurement value of a current through the transmitter coil.

A power reception deviceof a noncontact power supply apparatushas a resonance circuitthat resonates at a first frequency, a voltage detection circuitthat measures an output voltage from the resonance circuitand calculates a measured value of the output voltage, and a transmitterthat transmits a signal including information about the measured value of the output voltage to a power transmission device. The power transmission deviceof the noncontact power supply apparatushas a transmission coilfor supplying power to the power reception device, a power supply circuitthat supplies AC power having an adjustable switching frequency to the transmission coil, a receiverthat receives the signal including the information about the measured value of the output voltage, and a control circuitthat controls, in accordance with the measured value of the output voltage, the switching frequency so that the transmission coiland the power supply circuitcan continue a soft switching operation.

A power transmission devicefor a non-contact power supply devicehas: a transmission coil; a coilconnected in series to the transmission coilwithout joining to a reception coilduring power transmission, said reception coil being included in a resonance circuitfor a power reception device; a power supply circuitthat supplies, to the transmission coil, AC power having a switching frequency at which the transmission coildoes not resonate; and a control circuitthat controls the switching frequency and voltage of the AC power supplied to the transmission coiland controls whether or not both ends of the coilare short-circuited.

A contactless power transmission apparatus includes a secondary device that includes a resonant circuit including a second transmitter coil that transmits and receives electric power to and from a first transmitter coil included in a primary device and a resonant capacitor connected in parallel to the second transmitter coil, a second converter circuit connected to the resonant circuit to convert alternating current power flowing through the resonant circuit to direct current power and convert direct current power to alternating current power flowing through the resonant circuit, a coil connected in series to the second transmitter coil between the resonant circuit and the second converter circuit, and a capacitor connected in series to the second transmitter coil between the second transmitter coil and the second converter circuit.

Contactless power transmission apparatus with stable bidirectional power transmission

A power transmission devicein a non-contact power supply devicehas: a transmission coilthat supplies power to a power reception device; and a power supply circuitthat supplies AC voltage having a switching frequency at which the transmission coildoes not resonate, to the transmission coil. A power reception devicehas: a resonance circuithaving a reception coilthat receives power from the power transmission deviceand a resonance capacitorconnected in parallel to the reception coil; a rectification circuitthat rectifies power output from the resonance circuit; and a coilconnected in series to the reception coil, between the resonance circuitand the rectification circuit

Non-contact power supply device

A contactless power transmission apparatus includes a receiver that includes a resonant circuit including a receiver coil that receives electric power from a transmitter coil included in a transmitter and a resonant capacitor connected in parallel to the receiver coil. The receiver outputs, through an output coil having fewer turns than the receiver coil and a coil connected to the output coil, electric power received by the resonant circuit and rectifies the output power with a rectifier circuit. The transmitter includes a control circuit that controls a voltage and a switching frequency of alternating current power to be supplied to the transmitter coil from a power supply circuit to allow the contactless power transmission apparatus to continuously perform a constant voltage output operation.

Provided is a transformer (), which includes: a core () which forms a magnetic circuit and has a middle leg () and a plurality of side legs () branched from the middle leg (); primary windings () respectively wound around a first winding leg () and a second winding leg (), which are selected from the middle leg () and the side legs (); and a secondary winding () wound around either of the first winding leg () or the second winding leg (), wherein a first magnetic flux generated by the primary windings () from the first winding leg () and a second magnetic flux generated by the primary windings () from the second winding leg () differ from each other by a predetermined value or more at a position at which the fluxes do not intersect with the secondary winding ().

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Yokohama, Japan

Toshiyuki Zaitsu