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A Static Offline Parameter Identification Method for Permanent Magnet Synchronous Motor

A permanent magnet synchronous motor, parameter identification technology, applied in the control of generators, motor generator control, AC motor control, etc., can solve the problem of increasing the identification time of the rotor magnetic pole position

Inactive Publication Date: 2016-04-13
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of method generally judges the rotor magnetic pole polarity by injecting additional forward and reverse equal-amplitude and equal-width pulses, which increases the time for identifying the rotor magnetic pole position.

Method used

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  • A Static Offline Parameter Identification Method for Permanent Magnet Synchronous Motor
  • A Static Offline Parameter Identification Method for Permanent Magnet Synchronous Motor
  • A Static Offline Parameter Identification Method for Permanent Magnet Synchronous Motor

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Embodiment Construction

[0047] A static off-line parameter identification method for a permanent magnet synchronous motor, comprising steps in the following order:

[0048] Step 1. Inject the angular frequency ω into the stator winding of the permanent magnet synchronous motor c , the amplitude is u rot high frequency rotation voltage Gradually adjust the injection voltage amplitude u rot , until the first high-frequency rotary voltage injection amplitude is found, wherein the injected rotary voltage frequency is 500-2000 Hz, the injected voltage time is greater than 5 times the motor time constant, and the injected voltage time is not less than 200 ms. The specific process is:

[0049] Step 1-1, set the initial value of the injected amplitude of the high-frequency rotating voltage as u rot =Δu 1 , Δu 1 selected as 5% of the rated voltage);

[0050] Step 1-2, inject the angular frequency ω into the stator winding of the permanent magnet synchronous motor c , the amplitude is u rot high frequ...

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Abstract

The invention discloses a static off-line parameter identification method of a permanent magnet synchronous motor. The method comprises the steps that firstly, high-frequency rotation voltage with the angular frequency being omegac and the amplitude being urot is input into a stator winding of the permanent magnet synchronous motor, and the amplitude urot of the input voltage is gradually adjusted until the appropriate amplitude of the input high-frequency rotation voltage is found; secondly, the appropriate high-frequency rotation voltage obtained in the first step is input into the stator winding of the permanent magnet synchronous motor for 1000ms, and rotor magnetic pole initial position identification, direct-axis inductance identification and quadrature axis inductance identification are conducted; thirdly, stator resistance is identified through an automatic-adaption two-point type voltammetry in the direction of a rotor magnetic pole obtained through identification in the second step. By the adoption of the static off-line parameter identification method of the permanent magnet synchronous motor, the influence of saturation of a magnetic circuit of a rotor on inductance identification is eliminated, the influence of system non-linear factors on the resistance identification is eliminated, the identification precision is high, the identification time is short, and the rotor can be kept static.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor control, in particular to a static offline parameter identification method for permanent magnet synchronous motors, and is especially suitable for applications requiring offline parameter identification while keeping the rotor stationary. Background technique [0002] In the vector control of the permanent magnet synchronous motor based on the orientation of the rotor flux linkage, since the stator resistance, the direct axis inductance and the quadrature axis inductance determine the control parameters of the current loop, the above three variables and the initial value of the decoupling angle (the initial position of the rotor magnetic pole) It must be identified before starting to ensure the reliable starting of the permanent magnet synchronous motor. [0003] The off-line identification of the resistance of the permanent magnet synchronous motor generally adopts the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/18H02P27/08
Inventor 黄招彬游林儒汪兆栋文小琴占宏
Owner SOUTH CHINA UNIV OF TECH
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