The offline parameter identification method of line inductance electromotor
The offline parameter identification method of line inductance electromotor
 CN 109,412,483 A
 Filed: 10/23/2018
 Published: 03/01/2019
 Est. Priority Date: 10/23/2018
 Status: Active Application
First Claim
1. a kind of offline parameter identification method of line inductance electromotor characterized by comprisingPrimary resistance value obtaining step:
 primary resistance R is recognized using preset direct current experimental method_{1}, obtain primary resistance valueEquivalent series resistance obtaining step;
being passed through singlephase alternating current to line inductance electromotor, and current equivalent series electricity is calculatedHinder R_{eq}With equivalent series inductance L_{eq}；
Secondary electrical resistance value obtaining step;
singlephase high frequency alternating voltage is applied to line inductance electromotor, recognizes secondary resistance R_{2}, obtainSecondary electrical resistance valueParameters acquiring procedure;
singlephase lowfrequency ac pressure is applied with to line inductance electromotor, recognizes mutual inductance L_{m}, primary leakage inductance L_{1}WithSecondary leakage inductance L_{2}, obtain mutual inductance valuePrimary leakage inductance valueSecondary leakage inductance value
Chinese PRB Reexamination
Abstract
The invention discloses a kind of offline parameter identification methods of line inductance electromotor, comprising: primary resistance value obtaining step: recognizing primary resistance R using preset direct current experimental method_{1}；Equivalent series resistance obtaining step: Xiang Suoshu motor is passed through singlephase alternating current, and current equivalent series resistance R is calculated_{eq}With equivalent series inductance L_{eq}；Secondary electrical resistance value obtaining step: singlephase high frequency alternating voltage is applied to the motor, recognizes secondary resistance R_{2}, obtain secondary electrical resistance valueParameters acquiring procedure: singlephase lowfrequency ac pressure is applied with to the motor, recognizes mutual inductance L_{m}, primary leakage inductance L_{1}With secondary leakage inductance L_{2}.The present invention replaces locked rotor test by being passed through singlephase alternating current to the motor, in order to recognize secondary resistance R_{2}, singlephase high frequency alternating voltage is applied with to motor, in order to recognize mutual inductance L_{m}, primary leakage inductance L_{1}With secondary leakage inductance L_{2}, singlephase lowfrequency ac pressure is applied with to motor, solves the problems, such as that identification precision is poor, and then has obtained accurate initial parameter.
6 Claims

1. a kind of offline parameter identification method of line inductance electromotor characterized by comprising
Primary resistance value obtaining step:  primary resistance R is recognized using preset direct current experimental method_{1}, obtain primary resistance value
Equivalent series resistance obtaining step;
being passed through singlephase alternating current to line inductance electromotor, and current equivalent series electricity is calculatedHinder R_{eq}With equivalent series inductance L_{eq}；Secondary electrical resistance value obtaining step;
singlephase high frequency alternating voltage is applied to line inductance electromotor, recognizes secondary resistance R_{2}, obtainSecondary electrical resistance valueParameters acquiring procedure;
singlephase lowfrequency ac pressure is applied with to line inductance electromotor, recognizes mutual inductance L_{m}, primary leakage inductance L_{1}WithSecondary leakage inductance L_{2}, obtain mutual inductance valuePrimary leakage inductance valueSecondary leakage inductance value
 primary resistance R is recognized using preset direct current experimental method_{1}, obtain primary resistance value

2. the offline parameter identification method of line inductance electromotor as described in claim 1, which is characterized in that the equivalent seriesIn resistance obtaining step, equivalent series resistance R is calculated using following formula_{eq}:

3. the offline parameter identification method of line inductance electromotor as claimed in claim 2, which is characterized in that the secondary resistanceIt is worth in obtaining step, secondary electrical resistance value is calculated using following formula identification
R_{eq1}Equivalent series resistance R when to apply singlephase high frequency alternating voltage to line inductance electromotor_{eq}'"'"'sValue, β  0.92.

4. the offline parameter identification method of line inductance electromotor as claimed in claim 3, which is characterized in that the parameter obtainsIn step, mutual inductance value is calculated using following formula identification

5. the offline parameter identification method of line inductance electromotor as described in claim 1, which is characterized in that the secondary resistanceThe frequency range for being worth singlephase high frequency alternating voltage in obtaining step is 10R_{2}30R_{2}。

6. the offline parameter identification method of line inductance electromotor as described in claim 1, which is characterized in that the parameter obtainsThe frequency range of singlephase lowfrequency ac pressure is 2Hz6Hz in step.
Specification(s)