Voltage decoupling variable-frequency control vector controlling method with parameter self-regulating function
A technology of parameter self-tuning and frequency conversion speed regulation, which is applied in the design of frequency converter control scheme and the field of voltage decoupling frequency conversion speed regulation vector control, which can solve the problems that affect the performance of vector control and the complete decoupling of torque flux is no longer effective.
Inactive Publication Date: 2008-12-17
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
However, according to the literature "an improved vector control method for asynchronous motors" (Wang Lixin. Small and medium-sized motors, 2005, 32 (6)), in practical applications, due to temperature rise and magnetic saturation, the various parameters of asynchronous motors parameter changes, the complete decoupling of the torque flux that occurs in the ideal model of the motor is no longer effective, which in turn affects the vector control performance
[0004] The vector control performance of the frequency converter is affected by the parameter change of the asynchronous motor, and the speed regulation performance still needs to be improved. It is necessary to find a method to eliminate the deviation caused by the parameter change
The vector control method of variable frequency speed regulation with parameter self-tuning function can effectively eliminate the deviation and realize high performance variable frequency speed regulation. At present, there is no detailed report on the research and application of this technology
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[0019] figure 1 It is a schematic diagram of the hardware structure of the voltage decoupling vector control frequency converter with parameter self-tuning function. The vector control circuit is connected to the main circuit of the frequency converter composed of the rectification unit, braking unit and inverter unit. The vector control circuit is as follows: The output line of the transformer is connected to a voltage detection device and a current detection device, and the obtained analog output is subjected to isolation conversion and signal conditioning, and the obtained signal is input to the DSP module; the asynchronous motor is connected to a pulse encoder, and the obtained analog signal is passed through a photoelectric isolation pulse filter, The frequency multiplication processing device, and then through the counting device, the signal is input to the DSP module; the signal processed by the DSP program is output to the FPGA pulse distribution unit, and the analog co...
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The invention relates to one voltage decoupling transducer gear vector control method with parameters self-integrating functions, which tests transducer displacement motor stator end voltage, current and rotor speed through outlet voltage test unit, current test unit and speed test unit; according the vector converting the three-phase voltage, current into two-phase rotation coordinates value; for control given value exerting negative feedback adjust and for computation; through decoupling to get control value through inverse vector conversion computation to get three-phase voltage control value for recycle execution.
Description
technical field [0001] The invention relates to a voltage decoupling frequency conversion speed regulation vector control method with a parameter self-tuning function, which is used for the design of a frequency converter control scheme and belongs to the technical field of electric automation. Background technique [0002] With the continuous development of power electronics technology, electronic computer technology, and automatic control theory, the application of frequency conversion technology is becoming more and more popular. Frequency conversion technology is most widely used in frequency converter products, such as frequency conversion air conditioners, frequency conversion washing machines, frequency conversion refrigerators, etc. The trend of low noise, high reliability, low cost and miniaturization is developing. Inverter products are mainly applied to technologies including pulse width modulation technology, sliding mode technology, nonlinear transformation tec...
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IPC IPC(8): H02P21/00H02P27/04H02P21/14
Inventor 杨煜普李皎洁
Owner SHANGHAI JIAOTONG UNIV