摘要:
A stator for a two rotor single stator type electric motor is described. The electric motor has inner and outer rotors that are rotated independently within and around a stator upon application of current to the stator. The stator comprises a stator core including a plurality of stator teeth that are circumferentially arranged around a common axis. Each stator tooth includes a plurality of flat magnetic steel plates that are aligned along the common axis while intimately and closely contacting to one another. The stator further comprises at least one connecting ring plate that is coaxially installed in the stator core in such a manner that the ring plate is intimately put between adjacent two of the flat magnetic steel plates of each stator tooth. The ring plate is of an endless annular member.
摘要:
A first motor/generator unit (10A comprises a first rotor (42) and a first stator (40) with a plurality of coils. A second motor/generator unit (10B) comprises a second rotor (43) and a second stator (41) with a plurality of coils. By properly determining the number of coils S1, S2 in the stators (40, 41), the number of pairs of magnetic poles P1, P2 in the magnet of the rotors (42, 43), and the number of phases M1, M2 in alternating currents driving the rotors (42, 43), and connecting a coil with a coil number j in a group number i of the first stator (40) with a coil with a coil number i in a group number j of the second stator (41), it is possible to suppress an ineffectual current generated when two motor/generator units (10A, 10B) are independently driven by the same inverter (32).
摘要:
A rotary electric motor is provided which comprises an annular first rotor, an annular stator disposed concentric with and radially outside the first rotor, and an annular second rotor disposed concentric with and radially outside the stator, the stator including a stator core made up of a plurality of stator pieces that are arranged in a circular array and electrically independently from each other, coils wound around the respective stator pieces, annular first and second brackets disposed on opposite axial ends of the stator core, a fastening device passing through holes of the first and second brackets and fixedly holding the stator core between the first and second brackets, and an induction current suppressing device suppressing an induction current that is produced in response to a variation of magnetic flux of each of the coils and flows through the fastening device.
摘要:
A drive circuit for a motor/generator, having a first rotating electrical machine which is mainly used as a motor and a second rotating electrical machine which is mainly used as a generator, is characterized in that a booster circuit is disposed at a position where the current for rotating the first rotating electrical motor cancels out with the current generated by the second rotating electrical machine. In this manner, the booster circuit comprising small capacity elements can be used in the drive circuit for the motor/generator.
摘要:
An inverter (23) generates a composite current comprising an electrical current for a first rotor (4) and an electrical current for a second rotor (3). A microprocessor (22) controls the inverter (23) so that the average value of the composite current is smaller than the sum of the average values of the respective currents.
摘要:
A stator for use in a two rotor single stator type electric motor includes a stator core including a plurality of stator teeth that are circumferentially arranged around a common axis leaving a plurality of identical spaces each being defined between adjacent two of the stator teeth. Each stator tooth includes a plurality of flat magnetic steel plates that are aligned along the common axis. A plurality of coils are put around the stator teeth respectively. Bolts extend through identical spaces of the stator core for combining the flat magnetic steel plates to have a fixed structure of the stator core. A molded plastic fills the identical spaces of the stator core. A plurality of elongate plate bars extend in the identical spaces through the molded plastic respectively. Each elongate plate bar extends in parallel with the common axis and is constructed of a magnetic material that has an electric resistance higher than the bolts.
摘要:
A control device for a plurality of rotating electrical machines has a single current control device with an inverter, gate driver, and a motor controller, which supplies a control current to each rotating electrical machine allowing rotation control in response to the rotational phase of the rotor. In this control device, the current control device determines the control current of each rotating electrical machine based on the target torques and rotational angular velocities of all rotating electrical machines, and supplies a composite current obtained by combining the determined control currents for each rotating electrical machine to all rotating electrical machine. In this control device for a plurality of rotating electrical machines, the required voltage does not exceed the voltage of the power source and the peak value of the composite current does not exceed the permitted range of the inverter.
摘要:
An in-vehicle terminal (101) is provided, which has a function ensuring that computer resource secured by a virtual machine (1a1) or a virtual machine (1b1) is controlled within a limit value of the computer resource that is allocated to the corresponding virtual machine, or a function which is capable of executing multiple virtual machines appropriately.When the virtual machine (1a1) or the virtual machine (1b1) requests securing the computer resource, the in-vehicle terminal (101) requests the OS (143) to secure computer resource in response to the request, if the requested resource is lower than the limit value of the computer resource that is allocated to the corresponding virtual machine. Furthermore, the in-vehicle terminal (101) checks at predetermined intervals the continuously selected count of the virtual machine previously selected, and if the continuously selected count is equal to the limit value, or the virtual machine is in standby state, a different virtual machine is selected and the OS (143) is instructed to execute the selected virtual machine.
摘要:
Solid tin (Sn) is used as a target, a CO2 laser is used as an excitation source for the target, and after the size of debris emitted from plasma is decreased to a nanometer or smaller size by exciting the solid tin by a laser beam outputted from the CO2 laser, the emitted debris of a nanometer or smaller size is acted upon so as not to reach the optical element. In accordance with the present invention, in the EUV light source apparatus, the debris emitted together with EUV light from plasma generated by exciting a target within a chamber by a laser beam is prevented from adhering to an optical element provided within the chamber and forming a metal film. As a result, the service life of the optical element can be extended.
摘要:
For the purpose of reducing the time for information processing in an array type disk device provided with a plurality of optical disk devices, when a beginning address is notified from any one of the optical disk devices to a main control device of the array type disk device, the main control device determines the beginning address notified first as a writing start address, without waiting for a notification of a beginning address from any other optical disk devices. Then, the main control device notifies the determined writing start address to the respective optical disk devices. Accordingly, even if search times for the writing start address are different among the optical disk devices, all the optical disk devices can start the writing of information based on which optical disk device has most quickly notified the beginning address.