JP2017099232A5

JP2017099232A5 -

Info

Publication number: JP2017099232A5
Application number: JP2015232197A
Authority: JP
Filing date: 2015-11-27
Publication date: 2018-07-12
Anticipated expiration: 2035-11-27

Description

全ての周期のトルクリップルを測定するため、電動機１１の１回転分の回転角度とトルク指令Ｔ＊を採取することが望ましいが、必ずしも１回転分採取する必要はなく、例えばトルクリップルの周期がわかっている場合は、最低、（トルクリップル周期／３６０°）回転分だけのデータを採取すればよい。
In order to measure the torque ripple of all cycles, it is desirable to collect the rotation angle and torque command T * for one rotation of the motor 11, but it is not always necessary to collect one rotation, for example, the torque ripple cycle is known. If it is, data for at least (torque ripple period / 360 °) rotation may be collected.

Claims

An electric motor control device having a torque ripple correction function,
A rotation angle detector for detecting a rotation angle of the electric motor;
An angular acceleration calculation unit for second-order differentiation of the rotation angle to calculate the angular acceleration of the electric motor;
A torque calculator that multiplies the angular acceleration and the rotor inertia moment of the electric motor to convert the angular acceleration into torque;
An offset removing unit that removes an offset from the torque command and calculates a pulsation component included in the torque command;
A torque ripple adding unit that calculates the torque ripple by adding the torque calculated by the torque calculating unit and the pulsation of the torque command output from the offset removing unit;
A correction amount calculation unit that calculates a torque ripple correction amount corresponding to the rotation angle based on the rotation angle detected by the rotation angle detector and the torque ripple calculated by the torque ripple addition unit;
A correction amount addition unit for adding the correction amount calculated by the correction amount calculation unit to the torque command;
A control device comprising:

The control device according to claim 1,
The torque ripple addition unit aligns the torque calculated by the torque calculation unit, the pulsation of the torque command output from the offset removal unit, and the polarity with respect to each of the torque ripples, and then calculates the calculated torque and A control device that adds pulsations of the torque command.

The control device according to claim 1 or 2,
The torque ripple adder unit, the electric motor, at least, the controller, characterized in that, to calculate the torque ripple for each rotation angle during the period of rolling times (torque ripple period / 360 °).