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Rotating high-frequency signal injection system and position extraction method based on double-angle coordinate system
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A high-frequency signal and coordinate system technology, used in control systems, vector control systems, and control electromechanical transmissions, etc., can solve problems such as poor extraction results, software delays, and amplitude errors, and achieve enhanced stability and practicality. the effect of avoiding delays, avoiding complexity
Active Publication Date: 2022-04-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Due to the existence of band-pass and low-pass filters in the extraction method, amplitude errors and phase offsets are introduced, and software delays are caused, and the system is relatively complicated.
At the same time, the extraction effect depends entirely on the processing effect of the filter, so the extraction effect is not good
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[0102] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only for explaining the present invention, and are not intended to limit the scope of the present invention.
[0103] The invention discloses a rotating high-frequency signal injection system and a position extraction method based on a double-angle coordinate system. figure 1 It is a system structure block diagram of the present invention, including: power supply circuit, rectifier, inverter, permanent magnet synchronous motor, motor load module, motor current acquisition module, motor voltage acquisition module, Clark (abc axis-αβ axis) conversion module, Park (αβ axis-dq axis) transformation module, low-pass filter module, double-angle coordinate system analysis and calculation module, response current signal analysis module, rotor position extraction module, speed / angle calculation module, speed error module, speed PI (prop...
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Abstract
The invention discloses a rotating high-frequency signal injection system and a position extraction method based on a double-angle coordinate system, and belongs to the technical field of position sensorless control. The injection system of the present invention includes: a power supply circuit, a rectifier, an inverter, a permanent magnet synchronous motor, a motor load module, a motor current acquisition module, a motor voltage acquisition module, a Clark transformation module, a Park transformation module, a double-angle coordinate system analysis and calculation module, Response current signal analysis module, rotor position extraction module, speed / angle calculation module, speed error module, d-axis current error module, d-axis current PI module, q-axis current error module, high-frequency signal injection module, Park inverse transformation module, etc. . The invention can realize the positionless operation of the motor at low speed, obtain the estimated rotor position signal, reduce the use of low-pass filter on the basis of the rotating high-frequency signal injection method, simplify the signal extraction process, and improve the response speed And the signal extraction accuracy is superior.
Description
technical field [0001] The invention relates to a rotating high-frequency signal injection system and a position extraction method based on a double-angle coordinate system, and belongs to the technical field of position sensorless control. Background technique [0002] Permanent magnet synchronous motors have mainstream advantages in the field of servo drives due to their small size, high efficiency, high power density, easy control, long service life and strong reliability. Propulsion, CNC machine tools, locomotive traction, electric vehicles and household appliances have been widely used in many fields, and have become research hotspots for scholars from all over the world. [0003] In the field of electric tools, its volume requirements and working environment are relatively complex, and traditional position sensors are difficult to meet its processing accuracy and work requirements, so positionless technology is particularly important. In order to meet the conditions o...
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