The Experts below are selected from a list of 14250 Experts worldwide ranked by ideXlab platform

A Ooiwa - One of the best experts on this subject based on the ideXlab platform.

  • Method of evaluating frequency characteristics of pressure transducers using newly developed dynamic pressure generator
    Sensors and Actuators A-physical, 2000
    Co-Authors: T Kobata, A Ooiwa
    Abstract:

    A dynamic pressure generator using a rotating valve has been developed to evaluate the dynamic characteristics and performance of pressure transducers. The Waveform of the generated dynamic pressure is square, and the amplitude and fundamental frequency can be varied. In this paper, the generator using a novel rotating valve and the method of evaluating the frequency characteristics of pressure transducers using the generator are described. With the amplitude of the dynamic pressure of 10 kPa and varying the fundamental frequency in 1-Hz increments between 10 and 50 Hz, we Measured the generated dynamic pressure using two different pressure transducers, and to obtain the amplitude spectrum of the Measured Waveform using frequency analysis. Then, the magnitude of the harmonic components in the spectrum are shown as a function of frequency. From the simultaneous outputs of two transducers, the frequency characteristics of one transducer was compared with that of the other.

  • Square-wave pressure generator using a novel rotating valve
    Metrologia, 1999
    Co-Authors: T Kobata, A Ooiwa
    Abstract:

    To generate dynamic pressure precisely at low- and medium-pressure levels and in a low-frequency range, we have developed a square-wave pressure generator using a novel rotating valve. The main features of the valve are chambers in the rotor and grooves inside the stator. Pressurized air from two sources is continuously supplied to each chamber through the grooves. The valve switches the pressure alternately by its rotation, producing square-wave pressure. The amplitude and fundamental frequency of the generated pressure can be changed arbitrarily. The Measured Waveform is a periodic well-shaped square wave. The experimental results show that the repeatability of the system is good for a dynamic pressure source.

T Kobata - One of the best experts on this subject based on the ideXlab platform.

  • Method of evaluating frequency characteristics of pressure transducers using newly developed dynamic pressure generator
    Sensors and Actuators A-physical, 2000
    Co-Authors: T Kobata, A Ooiwa
    Abstract:

    A dynamic pressure generator using a rotating valve has been developed to evaluate the dynamic characteristics and performance of pressure transducers. The Waveform of the generated dynamic pressure is square, and the amplitude and fundamental frequency can be varied. In this paper, the generator using a novel rotating valve and the method of evaluating the frequency characteristics of pressure transducers using the generator are described. With the amplitude of the dynamic pressure of 10 kPa and varying the fundamental frequency in 1-Hz increments between 10 and 50 Hz, we Measured the generated dynamic pressure using two different pressure transducers, and to obtain the amplitude spectrum of the Measured Waveform using frequency analysis. Then, the magnitude of the harmonic components in the spectrum are shown as a function of frequency. From the simultaneous outputs of two transducers, the frequency characteristics of one transducer was compared with that of the other.

  • Square-wave pressure generator using a novel rotating valve
    Metrologia, 1999
    Co-Authors: T Kobata, A Ooiwa
    Abstract:

    To generate dynamic pressure precisely at low- and medium-pressure levels and in a low-frequency range, we have developed a square-wave pressure generator using a novel rotating valve. The main features of the valve are chambers in the rotor and grooves inside the stator. Pressurized air from two sources is continuously supplied to each chamber through the grooves. The valve switches the pressure alternately by its rotation, producing square-wave pressure. The amplitude and fundamental frequency of the generated pressure can be changed arbitrarily. The Measured Waveform is a periodic well-shaped square wave. The experimental results show that the repeatability of the system is good for a dynamic pressure source.

Masatoshi Saruwatari - One of the best experts on this subject based on the ideXlab platform.

Hidehiko Takara - One of the best experts on this subject based on the ideXlab platform.

Jian-zhong Jiang - One of the best experts on this subject based on the ideXlab platform.

  • Research on a novel combined permanent magnet electrical machine
    2008 International Conference on Electrical Machines and Systems, 2008
    Co-Authors: Shiqin Du, Yue Jin Zhang, Jian-zhong Jiang
    Abstract:

    A novel combined permanent magnet electrical machine has been presented in this paper. The paper describes the design and simulation of a combined electrical machine, in which an outer rotor brushless PM motor is embedded into a novel magnetic gear. A higher torque output for direct drive was transmitted by the combined electrical machine with a topology of inner stator and outer rotor. The numerical-analytical method is applied to calculate the magnetic field. There is no any mesh grid in air gap regions when the magnetic field of a combined electrical machine is computed by the method so that the rotors can be rotated freely. The induced EMF and electromagnetic torque can be conveniently calculated, and the calculated EMF Waveform shows good agreement with the Measured Waveform.

  • Research on a novel combined permanent magnet electrical machine
    2008 International Conference on Electrical Machines and Systems, 2008
    Co-Authors: Shiqin Du, Yue Jin Zhang, Jian-zhong Jiang
    Abstract:

    A novel combined permanent magnet electrical machine has been presented in this paper. The paper describes the design and simulation of a combined electrical machine, in which an outer rotor brushless PM motor is embedded into a novel magnetic gear. A higher torque output for direct drive was transmitted by the combined electrical machine with a topology of inner stator and outer rotor. The numerical-analytical method is applied to calculate the magnetic field. There is no any mesh grid in air gap regions when the magnetic field of a combined electrical machine is computed by the method so that the rotors can be rotated freely. The induced EMF and electromagnetic torque can be conveniently calculated, and the calculated EMF Waveform shows good agreement with the Measured Waveform.