TOYOTA JIDOSHA KABUSHIKI KAISHA (20240243687). DRIVE APPARATUS simplified abstract

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DRIVE APPARATUS

Organization Name

TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor(s)

Yu Nito of Toyota-shi (JP)

Tatsuya Nishino of Toyota-shi (JP)

Kazuki Minami of Toyota-shi (JP)

Junichiro Yasui of Seto-shi (JP)

DRIVE APPARATUS - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240243687 titled 'DRIVE APPARATUS

Simplified Explanation:

This patent application describes a drive apparatus that includes an electric motor with a rotor and stator, a gear connected to the rotor shaft, and a control device to manage the drive current in the stator core. The gear's teeth are designed to align the fluctuation of the meshing torque with the torque ripple in the motor. When the gear vibration exceeds a set value, the control device implements harmonic superposition control to reduce the gear's vibration.

  • The drive apparatus consists of an electric motor, a gear, and a control device.
  • The gear's teeth are strategically designed to align torque fluctuations with the motor's torque ripple.
  • The control device intervenes when gear vibration surpasses a predetermined threshold, implementing harmonic superposition control to minimize vibration.

Key Features and Innovation:

  • Integration of harmonic superposition control to reduce gear vibration.
  • Synchronization of torque fluctuations in the gear with the motor's torque ripple.
  • Precise design of gear teeth to optimize performance and minimize vibration.

Potential Applications:

  • Industrial machinery
  • Automotive systems
  • Robotics

Problems Solved:

  • Minimizing gear vibration
  • Enhancing overall system performance
  • Improving efficiency and reliability

Benefits:

  • Reduced maintenance costs
  • Enhanced operational stability
  • Increased lifespan of components

Commercial Applications:

The technology can be applied in various industries such as manufacturing, automotive, and robotics to improve the performance and reliability of drive systems.

Questions about Drive Apparatus:

1. How does the harmonic superposition control reduce gear vibration in the drive apparatus? 2. What are the potential industrial applications of this technology?


Original Abstract Submitted

a drive apparatus includes: (a) an electric motor including a rotor and a stator that has a stator core and a stator coil; (b) a gear connected to a shaft of the rotor; and (c) a control device configured to control a drive current flowing through the stator core. the gear has a number of teeth which makes an order of a fluctuation of a meshing torque generated in the gear coincide with an order of a torque ripple generated in the electric motor. when a magnitude of vibration of the gear caused by the torque ripple and the fluctuation of the meshing torque exceeds a predetermined determination value, the control device is configured to execute a harmonic superposition control for superposing a harmonic current on a fundamental wave of the drive current such that the magnitude of the vibration of the gear is reduced.

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