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Torque ripple suppression control apparatus and torque ripple suppression control method for rotating electrical machine

A technology for rotating electrical machines and torque fluctuations, applied in the field of periodic disturbance suppression control, and can solve problems such as low rapidity

Active Publication Date: 2012-11-07
MEIDENSHA ELECTRIC MFG CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The control parameter automatic adjustment process in the above compensation current Fourier coefficient learning control method becomes lower in quickness of response to variable speed operation due to suppression of disturbance by adjusting I-P control gain

Method used

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  • Torque ripple suppression control apparatus and torque ripple suppression control method for rotating electrical machine
  • Torque ripple suppression control apparatus and torque ripple suppression control method for rotating electrical machine
  • Torque ripple suppression control apparatus and torque ripple suppression control method for rotating electrical machine

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Embodiment Construction

[0108] figure 1 is a computational block diagram of torque fluctuation suppression control using a periodic disturbance observer according to an embodiment of the present invention.

[0109] Torque fluctuation extraction part 32 ( image 3 The torque ripple frequency component extraction section 19) shown in An and the nth order torque ripple extraction component (sine coefficient) T Bn . Periodic Disturbance Observer 31 ( image 3 The torque fluctuation suppression control section 21 shown in ) is similar to the periodic disturbance observer proposed by Non-Patent Document 1. However, in order to adopt a structure with synchronous coordinates of torque fluctuations, the periodic disturbance observer 31 uses the one-dimensional complex The inverse property of a vector.

[0110] First, the n-th order compensation current I shown by equation (2) qcn * Expressed in complex vectors. According to Euler's formula, the conversion below is obtained.

[0111] [mathematical f...

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Abstract

Torque ripples can be suppressed favorably, by reducing delays in the estimation of the real part and imaginary part components of a periodic-disturbance, in torque ripple suppression control by a periodic-disturbance observer. The periodic-disturbance observer (31) obtains the real part (IAn) and imaginary part (IBn) of an estimated current value including the periodic-disturbance, from a value that is a result of having system transfer functions for each of the nth-order torque ripple frequency components, starting from the torque command value through to a detected torque value, identified with a one-dimensional complex vector having a real part (P^ An) and an imaginary part (P^ Bn), and from a cosine coefficient (TAn), a sine coefficient (TBn), and the real part (P^ An) and imaginary part (P^ Bn) of the system transfer functions. The periodic-disturbance observer then obtains estimation values for the real part (dIAn) and imaginary part (dIBn) of a periodic-disturbance current for canceling the periodic-disturbance current, by subtracting compensation current command values (IAn*, IBn*) via ripple extraction filters (GF) from the real part (dIAn) and imaginary part (dIBn) of the estimated current value, respectively.

Description

technical field [0001] In a torque control system or device of a rotating electrical machine such as an electric motor, the present invention relates to a control device and a control method for automatically suppressing torque fluctuation (torque ripple) in a rotating electrical machine, and more particularly, to observing Periodic disturbance suppression control of the controller. Background technique [0002] Electric motors generally generate torque fluctuations (torque ripple), and thus cause various problems such as vibration, noise, adverse effects on ride quality, and electrical and mechanical resonance. In particular, in view of the widespread spread of internal PM motors (IPMSMs) recently, cogging torque fluctuations and reluctance torque fluctuations are compounded. As a countermeasure, various methods are being researched and investigated, such as a countermeasure method of superimposing a compensation current for eliminating torque fluctuations on a torque comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P27/04H02P21/05H02P21/13H02P23/04H02P23/07H02P23/12H02P23/14
CPCH02P21/05H02P23/04H02P21/13H02P21/00H02P27/04
Inventor 只野裕吾
Owner MEIDENSHA ELECTRIC MFG CO LTD
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