Method of recognizing moment of inertia of permanent magnet synchronous machine based on reduced-order current ring

A technology of permanent magnet synchronous motor and moment of inertia, which is applied in the direction of motor generator control, electronic commutation motor control, control generator, etc. It can solve the problems that the system cannot be applied and does not meet the working conditions, so as to improve the robustness of the system , Increase practicality, and the effect of reliable self-learning ability

Active Publication Date: 2017-05-31
SOUTHEAST UNIV
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Problems solved by technology

That is to say, the electromagnetic braking must be completed during the deceleration process of the motor, which cannot be completed by ordinary frequency converters. This method can only be completed by using four-quadrant frequency converters in the laboratory.
On the other hand, the direction of the no-loa

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  • Method of recognizing moment of inertia of permanent magnet synchronous machine based on reduced-order current ring
  • Method of recognizing moment of inertia of permanent magnet synchronous machine based on reduced-order current ring
  • Method of recognizing moment of inertia of permanent magnet synchronous machine based on reduced-order current ring

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[0074] Step 1) For the motor to be tested, select a suitable inverter. A fixed voltage vector is applied to the motor, the vector angle is 0, and the amplitude is slowly increased through the voltage regulator until the rotor does not shake. That is, the rotor position is locked. The rotor is fixed by the external mechanical structure.

[0075] Step 2) Connect the BC phase, apply a voltage vector, the vector angle is 0, the amplitude is a sine quantity, and the vibration frequency is successively superimposed at 10% of the rated speed. Carry out discrete Fourier transform on the direct-axis current, find the current amplitude, and substitute it into the direct-axis equation to calculate the direct-axis inductance.

[0076] Step 3) Phase A is suspended, and a voltage vector is applied. The angle of the vector is 90 degrees and the amplitude is a sine. The vibration frequency is increased from 10% of the rated speed to 100% of the rated speed, and the quadrature axis current is su...

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Abstract

The invention discloses a method of recognizing rotational inertia of a permanent magnet synchronous machine based on a reduced-order current ring; current ring order reduction is performed according to motor electromagnetic parameters based on a current ring PI (proportional-integral) controller so that the current ring becomes a first-order response system; mechanical inertial parameters of the machine are acquired by measuring frequency response of the system under excitation of a reference torque of sinusoidal superposition direct-current bias. An algorithm may be integrated in a machine controller program just by using a universal converter, moment of inertia testing complexity is reduced, recognizing is simple and easy and is easy to implement in engineering, and the method is significant to the design of intelligent motor controllers.

Description

Technical field [0001] The invention relates to the field of electrical appliance control, in particular to a method for identifying the moment of inertia of a permanent magnet synchronous motor based on a reduced-order current loop. Background technique [0002] Permanent magnet synchronous motors have important and broad application prospects in servo systems, industrial drives, new energy vehicles and other fields due to their high power density, high efficiency, low torque ripple and excellent dynamic characteristics. In the motor controller, the rotor mechanical moment of inertia of the permanent magnet synchronous motor is an important parameter. It is very important for the speed loop design in the motor controller. There are mainly three types of traditional moment of inertia measurement schemes, namely, measurement using precision measuring instruments, recording measurement of motor acceleration and no-load deceleration, three-wire pendulum and simple pendulum measurem...

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Application Information

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IPC IPC(8): H02P21/14
CPCH02P21/14
Inventor 花为侯创孟建建程明
Owner SOUTHEAST UNIV
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