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Voltage decoupling variable-frequency control vector controlling method with parameter self-regulating function

A technology of parameter self-tuning and variable frequency speed regulation, which is applied in the design of inverter control schemes and in the field of voltage decoupling variable frequency speed regulation vector control, which can solve the problems that the complete decoupling of torque and magnetic flux is no longer effective and affects the performance of vector control.

Inactive Publication Date: 2007-08-08
SHANGHAI JIAO TONG 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

Method used

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  • Voltage decoupling variable-frequency control vector controlling method with parameter self-regulating function

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Embodiment Construction

[0019] Figure 1 is a schematic diagram of the hardware structure of a voltage decoupling vector control inverter with parameter self-tuning function. A vector control circuit is connected to the main circuit of the inverter composed of a rectifier unit, a braking unit and an inverter unit. The vector control circuit is as follows: A voltage detection device and a current detection device are connected to the output line of the inverter, 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 filtered by the photoelectric isolation pulse. The signal is input to the DSP module through the counting device; the signal processed by the DSP program is output to the FPGA pulse distribution unit, and the obtained analog control signal is used to control the inverter unit through the drive buffer and the base dr...

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Abstract

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 variable frequency speed regulation vector control method with parameter self-tuning function, which is used for the design of a frequency converter control scheme and belongs to the technical field of electrical automation. Background technique [0002] With the continuous development of power electronic technology, electronic computer technology and automatic control theory, the application of frequency conversion technology is becoming more and more popular. The most widely used inverter technology is inverter products, such as inverter air conditioners, inverter washing machines, inverter refrigerators, etc. It is moving towards a high degree of digital integration, high performance torque control, sound protection The trend of low noise, high reliability, low cost and miniaturization is developing. The main technologies used in inverter products include pulse width modulation technology, sliding mode ...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P27/04H02P21/14
Inventor 杨煜普李皎洁
Owner SHANGHAI JIAO TONG UNIV
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