摘要:
An alternator for an engine normally operated as a generator is caused to operate as a synchronous motor according to the operating condition of the engine. If power generation by the alternator 1 is no longer necessary because a battery 9 is fully charged, or when the engine enters an acceleration condition, a switching controller 5 switches stator coils 12 for the alternator 1 from an output controller 7 to a rotating magnetic field generator 8. The rotating magnetic field generator 8 causes a stator 1S to generate a rotating magnetic field that rotates with a same rotation speed of a rotor 1R, so that the alternator 1 operates as a synchronous motor to generate such a torque 50 as to assist the torque or rotation of the engine. If the engine speed is likely to exceed a maximum limit, or when the engine enters a deceleration condition, the stator is caused to generate a rotating magnetic field with a phase angle relative to a direct-current magnetic field of the rotor so that the alternator generates such a torque as to suppress the engine speed.
摘要:
There is provided a generator system for internal combustion engines, which can produce power efficiently at all times irrespective of the engine speed even for use in an internal combustion engine operated at variable speeds such as a vehicle engine. An AC generator electronic control unit (ACG.ECU) 3 determines a rotation speed N2 of a rotating electromagnetic field to be generated by a rotor 1R based on a mechanical rotation speed N1 of the rotor 1R in an alternator 1 such that the relative speed N of the rotating magnetic field to a stator 1S agrees with the maximum efficiency speed of rotation Nx. Then the ACG.ECU 3 sends the determined value to a rotating electromagnetic field controller 2a. The rotating electromagnetic field controller 2a controls phases of AC power to be supplied to a three-phase coil 11 of the rotor 1R to generate a rotating electromagnetic field with the rotation speed N2.
摘要:
An induction machine used as a power generator for an internal combustion engine, and which generates a predetermined power regardless of a rotation speed of a rotor of the induction machine and the engine. A power P to be generated is controlled so as to be equal to an upper limit value Pmax or less, a lower limit value or more or, equal to a target value Pc. The power generation control is achieved in the following manner. A speed N2 of the rotating magnetic field electrically generated with a three-phase winding of the rotor 1R is controlled in accordance with the mechanical rotation speed N1 of the rotor 1R in order that a relative speed N of the rotating magnetic field generated in the rotor with respect to a stator coil is kept at an upper limit speed Nmax or less, a lower limit speed Nmin or more, or a target relative speed Nc.
摘要:
A method and apparatus are presented for inductive charging of battery operated devices in a motor vehicle, in which a passive vehicle entry and/or starting system selectively disables or reduces provision of power to a primary coil of an inductive charging station while the passive system communicates with an external user device such as a key fob controller to avoid or mitigate electromagnetic interference.
摘要:
A vehicle entry/tire pressure management system includes a plurality of tire sensors, a plurality of low frequency (“LF”) antennas and an ECU. Each tire sensor is mounted in a respective tire of the vehicle. Each LF antenna is mounted on the vehicle and is configured to transmit an LF field to wake up two tire sensors. Some antennas can also be configured to transmit a SMART entry LF search field to wake up a portable transmission/reception unit for keyless entry of the vehicle. The ECU is in communication with the tire sensors, via a receiver, and the LF antennas. The ECU is configured to receive identification signals from the respective tire sensors and to determine locations of the respective tire sensors based on which antenna woke up the tire sensor transmitting the respective identification signal and whether the respective identification signal matches other received identification signals.
摘要:
A peak factor reduction unit that never allow peak factor reproduction even when interpolation is done in a succeeding stage. The unit detects a local maximum value of amplitude components from an input complex signal and supplies a complex signal that passes a band limiting baseband filter and an interpolation filter to a correction signal generation unit for generating a correction signal used for peak factor reduction and reduces a peak factor of the input complex signal with use of the correction signal generated from an interpolated complex signal.
摘要:
An interferometer for demodulating a differential M-phase shift keying signal includes a PLC type interferometer main body, a heating portion that heats the PLC type interferometer main body, and an intermediate member having a higher stiffness than that of the PLC type interferometer main body, for bonding the PLC type interferometer main body and the heating portion with each other while being sandwiched therebetween. A linear expansion coefficient difference between the PLC type interferometer main body and the intermediate member is equal to or smaller than 4.5×10−6/° C., and a thermal conductivity difference between the PLC type interferometer main body and the intermediate member is equal to or larger than 10 W/mK. A phase of an optical signal flowing through the interferometer is adjusted by using the heating portion and a second heating portion.
摘要:
A waveguide-type optical multiplexer/demultiplexer with low crosstalk characteristics and reduced wavelength dispersion is provided. A waveguide-type optical multiplexer/demultiplexer comprising, first, second and third optical multiplexer/demultiplexer circuits connected in multistage, each multiplexer/demultiplexer circuit has four input-output ports, third input-output port of first optical multiplexer/demultiplexer circuit is connected to third input-output port of second optical multiplexer/demultiplexer circuit, and fourth input-output port of first optical multiplexer/demultiplexer circuit is connected to fourth input-output port of third optical multiplexer/demultiplexer circuit, when wavelength division multiplex signals having wavelength λ1, λ2, λ3, λ4, λ5, λ6 . . . are input through first input-output port of first optical multiplexer/demultiplexer circuit, multiplex signals of odd wavelength λ1, λ3, λ5 . . . are output from first input-output port of second optical multiplexer/demultiplexer circuit, and multiplex signals of even wavelength λ2, λ4, λ6 . . . are output from first input-output port of third optical multiplexer/demultiplexer circuit.
摘要:
A glass wave guide element, which is small in size and amenable to integration and mass-production, and a method of manufacturing the glass wave guide element are provided. The glass wave guide element includes a core having a diffraction grating formed on an under cladding, an over cladding covering the core and a heater for changing the Bragg wavelength of the diffraction grating, the heater being arranged on the over cladding. The core and a central portion of both claddings in a surrounding portion around the core are formed in a state of being continuously separated along a longitudinal direction of the core from the substrate through a gap, and the core and the surrounding portion around the core are formed in a state of being spatially intermittently separated in a width direction of the core from a surrounding portion of both claddings through a gap. The wave guide is formed by etching to form gaps spaced intermittently along both sides of a core with under cladding and over cladding, and then removing a patterned silicon film from underneath the core.
摘要:
An optical wavelength multiplexer/demultiplexer, comprising: a substrate: and, provided thereon, input waveguides, output waveguides, an array waveguide diffraction grating comprising a plurality of waveguides with a predetermined difference in length being provided between the waveguides, an input slab waveguide for connecting the input waveguides to the array waveguide diffraction grating, an output slab waveguide for connecting the output waveguides to the array waveguide diffraction grating, and multimode waveguides, for example, tapered waveguides and parabolic waveguides, provided in a connecting section between the input waveguides and the input slab waveguide. The output slab waveguide may have a smaller radius than the input slab waveguide to narrow the width of the electric field distribution on the output side. The above construction can bring wavelength characteristics to a rectangular form to broaden the transmission band and at the same time can reduce the loss.