JP2021039136A5 - - Google Patents

Claims (5)

It is a torque fluctuation measuring device for rotary motors.
The test motor (1) as the motor to be measured and
Torque detector (4) that detects torque by twisting the shaft,
An energy absorption generator (2) that is connected to the rotation shaft of the test motor via the torque detector (4), operates as a drive motor up to a set rotation speed, and then acts as a dynamic brake. In the torque fluctuation measuring device provided with
The moment of inertia of the flywheel (3) is a value at which the vibration of the test motor (1) does not affect the flywheel (3) and only the fluctuation of the test motor (1) is transmitted to the torque detector (4). torque fluctuation measuring device, characterized in that. The test motor (1) as the motor to be measured and
Torque detector (4) that detects torque by twisting the shaft,
It is connected to the rotation shaft of the test motor (1) via a torque detector (4), operates as a drive motor up to the set rotation speed, and controls the rotation speed during the test after reaching the set rotation speed. An energy absorption generator (2) that acts as a power generation brake,
With the flywheel (3) between the energy absorption generator (2) and the torque detector (4)
In the torque fluctuation measuring device of the rotary motor equipped with
A torque fluctuation measuring device characterized in that the moment of inertia of the flywheel (3) is about 233 times or more the moment of inertia of the test motor (1). The first or second claim, wherein the rotating shaft of the energy absorbing generator (2) and the rotating shaft of the flywheel (3) are connected via a coupling (5) for removing vibration. Torque fluctuation measuring device. In the method of measuring the torque characteristics of the rotary motor using the torque fluctuation measuring device according to any one of claims 1 to 3, the torsional spring constant of the rotating shaft system including the spring constant of the torque detector (4) ( A torque fluctuation measurement method in which measurement is performed according to a measurement frequency using _{K n} ) and the natural frequency f _n ≈ 1 / 2π × √ (K _n / I ₁ ) of the measurement system. Coupling for the vibration cancellation in the torque fluctuation measuring device according to claim 3 (5) is a rubber coupling, by changing the spring constant of the torque sensor (4), the rotary shaft system torsional spring constant ( K _n) changing the natural frequency of the measuring system at _{f n} ≒ 1 / _2π × √ changing _(K n / _{I 1),} the torque variation measurement method.