Method and device for distinguishing double-three-phase motor parameter on line on harmonic plane

A technology of harmonic plane and motor parameters, which is used in the control of electromechanical transmission, control of generators, motor-generator control, etc., can solve the problems of high accuracy, lack of robustness, and lack of versatility.

Active Publication Date: 2013-11-20
TSINGHUA UNIV
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Problems solved by technology

[0023] The present invention aims at the deficiencies that most of the current identification methods are not robust and rely on other parameters of t

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  • Method and device for distinguishing double-three-phase motor parameter on line on harmonic plane
  • Method and device for distinguishing double-three-phase motor parameter on line on harmonic plane
  • Method and device for distinguishing double-three-phase motor parameter on line on harmonic plane

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Embodiment Construction

[0140] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0141] Such as figure 2 As shown, it is the distribution diagram of the switching vector on the plane; it can be seen from the diagram that when only one set of windings is in operation, the switching state of the other set of windings is 000 or 111, and the unified identification is XXX. Obviously when two sets of windings are running at the same time, the switch vector should be the synthesis of the two sets of winding switch vectors. Taking the α-β plane as an example, the voltage vector corresponding to the switch state 100100 is the sum of the voltage vector corresponding to the switch state 100 when the ABC winding operates alone and the voltage vector corresponding to the switch state 100 when the UVW winding operates alone. Therefore by figure 2 The twelve switching vectors in the two sets of windings operating independently can synthesiz...

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Abstract

The invention specifically relates to a method and a device for distinguishing a double-three-phase motor parameter on line on a harmonic plane, and belongs to the field of mechanical and electrical technology. The method provided by the invention comprises the following steps of carrying out coordinate transformation on collected phase current in a motor vector control system to obtain the feedback current of a fundamental wave plane and a harmonic plane; according to the feedback current of the fundamental wave plane, calculating the reference voltage of the fundamental wave plane and the reference current of the harmonic plane; according to the error of the reference current and the feedback current of the harmonic plane, calculating stator resistance, stator leakage inductance and the reference voltage of the harmonic plane; according to the reference voltage of the fundamental wave plane and the harmonic plane, calculating the reference voltage of two sets of windings, i.e. ABC and UVW; and finally, according to a three-phase PWM (pulse-width modulation) strategy, calculating the conduction state and time of an inverter switching tube, and driving the motor to operate. The invention has the advantages of high distinguishing accuracy, quickness in convergence, simple algorithm and device and easiness in realizing, and a distinguishing result does not depend on other motor parameters.

Description

technical field [0001] The invention specifically relates to a method and device for online identification of parameters of a dual-three-phase motor on a harmonic plane, and belongs to the field of electromechanical technology. Background technique [0002] Compared with three-phase motors, multi-phase motors have the advantages of low torque ripple, high reliability, and strong fault tolerance. The double-three-phase motor is the most widely used and researched type of multi-phase motor. Its two sets of stator windings are 30° apart in space, and the neutral point is not connected. It is powered by two sets of parallel voltage-type inverters, which can effectively Eliminate sixth harmonic torque ripple and significantly reduce rotor current harmonic components, thereby reducing rotor losses. [0003] The accuracy of the dual-three-phase motor parameters, especially the stator-rotor resistance and mutual inductance parameters, plays a decisive role in the control performanc...

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Application Information

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IPC IPC(8): H02P21/14H02P27/08
Inventor 盛爽陆海峰瞿文龙李毅拓田菁菁
Owner TSINGHUA UNIV
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