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Method for detecting position of sensorless rotor of PMSM for blower fan

A technology for permanent magnet synchronous motors and sensor rotors, which is applied to control electromechanical transmissions, electromechanical brakes, and generators, etc., and can solve problems such as high computing requirements, poor real-time performance, and rotor position oscillations

Inactive Publication Date: 2015-11-18
TAIZHOU POLYTECHNIC COLLEGE +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The extended Kalman filter method requires complex matrix inversion operations, which has high computing requirements for the CPU and poor real-time performance.
The model reference adaptive method can only be adjusted to the best in a certain speed range. When the speed is lower than the speed range, the detected rotor position will easily cause oscillation, and when the speed is higher than the speed range, the detected rotor position will easily lead to large fluctuations. Delay

Method used

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  • Method for detecting position of sensorless rotor of PMSM for blower fan
  • Method for detecting position of sensorless rotor of PMSM for blower fan
  • Method for detecting position of sensorless rotor of PMSM for blower fan

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Embodiment Construction

[0053] Attached below figure 2 and Examples to further illustrate the present invention.

[0054] The sensorless rotor position detection method for a permanent magnet synchronous motor for a fan of the present invention controls the direct-axis current by inputting the direct-axis voltage including the rotor position error information output by the direct-axis current regulator into the phase-locked loop rotor position tracking proportional-integral estimator. zero, the rotor position and speed are estimated.

[0055] see figure 2 , the method includes the following steps:

[0056] (1) Use the sensor to detect the three-phase current ia, ib, ic of the motor;

[0057] (2) Using Clarke transformation and Park transformation to transform the three-phase currents ia, ib, ic into two-phase alternating and direct-axis currents id, iq;

[0058] (3) Controlling the direct-axis current id to be zero, and generating the direct-axis voltage including the rotor position error infor...

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Abstract

The invention provides a method for detecting the position of a sensorless rotor of a PMSM for a blower fan. The method includes the steps of converting three-phase current into two-phase d-axis q-axis current through Clarke conversion and Park conversion when a sensor detects the three-phase current of a motor, sending d-axis voltage generated by a d-axis current PI controller and containing rotor position error information to a phase-locked loop rotor position tracking proportional integral estimator, controlling gain parameter according to the PI in work frequency selection estimator of an inverter switch, and estimating the position and rotating speed of a rotor by controlling the d-axis current to be zero. Only permanent magnetic linkage is needed, no other motor parameters are needed, and the algorithm is simple. The position and rotating speed of a rotor can be accurately detected when the rotating speed reaches over 20% of the rated rotating speed. The method is applicable to PMSMs for heating ventilation and industrial purifying blower fans with wide power levels.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor, in particular to a sensorless rotor position detection method for a permanent magnet synchronous motor matched with fans in the fields of air conditioning, plant purification, building HVAC engineering, communication base stations, rail vehicles and the like. Background technique [0002] In recent years, with the rapid development of power electronics technology, variable frequency control and the realization of complex algorithms, high-performance, low-cost microprocessors, the vector-controlled permanent magnet synchronous motor (PMSM) has high efficiency, low power and low power in a wide speed and wide load range. With the characteristics of noise and precise speed control, it has become the preferred motor for fans in air conditioning, plant purification, building HVAC engineering, communication base stations, rail vehicles and other fields. The permanent magnet synchronous motor base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 陈震薛晓明
Owner TAIZHOU POLYTECHNIC COLLEGE
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