Inverter technology trends – technology, inverter – HC net electrical industry –
This paper converter technology development trend quite insightful analysis.
AC Variable Speed is the strength of electric hybrid, Electrical Integrated technology, we must deal with enormous energy conversion (rectifier, inverter), have to deal with information collection, transformation and transmission, so it's common technology will power and control into two parts. The former high-voltage high-current to address technical issues related to power electronic devices and the new application technology, and the latter to solve (on modern control theory and intelligent control strategy control strategy) hardware and software development problems (in the current state of the main Full digital control technology).
The main direction of the following number.
(1) to achieve a high level of control. Based on Electric motor And mechanical model of the control strategy, a vector control, field control, direct transmission and mechanical moment control of torsional vibration compensation; control strategy based on the modern theory, there are sliding mode technique, model reference adaptive techniques, using differential geometry theory nonlinear decoupling, robust observer, in some indicators in the sense of optimal control techniques and the inverse Nyquist array design methods; of thought control based on intelligent control strategy, a fuzzy control, neural networks, expert systems and a variety of self-optimizing, self-diagnosis technology.
(2) the development of clean electric power converter. The so-called clean energy converter is the converter's power factor is 1, the net side and load side of the harmonic components as low as possible to reduce the power of public nuisance and the motor torque ripple. Converter for medium and small capacity, improve the switching frequency of the PWM control is effective. Large-capacity converter, the conventional switching frequency, can change the circuit structure and control method to achieve clean energy transformation.
(3) reduce the device size. Compact power converter and control components required a high level of integration, which Package Including intelligent power module optocoupler compact, high-frequency switching power supply, and the use of new materials of small size electrical transformer, reactors and capacitors. Changes in cooling the power devices (such as water cooling, evaporative cooling and heat pipes) to reduce the device size is also very effective.
(4) high-speed digital control. To 32-bit high-speed microprocessor-based digital control template has enough ability to achieve a variety of control algorithms, Windows operating system makes the introduction of free designs, graphics programming control technology has greatly developed.
(5) simulation and computer-aided design (CAD) technology. Motor Simulator, the load simulator and a variety of CAD software for the design and introduction of inverter Test Provided strong support.
Major R & D projects are the following.
(1) Digital control of high power AC – AC converter power transmission equipment.
(2) power converter load current inverter, the transmission equipment in the pumped storage power station, large Fans And promote the use of the pump on.
(3) GTO voltage inverter promote the use of railway locomotives.
(4) Voltage IGBT, IG CT Inverter drive devices to expand functionality and improve performance. Such as 4-quadrant operation, with the parameters from the measurement electrodes and self-configuration and automatic compensation for changes in motor parameters and no Sensor Vector control, direct torque control.
(5) fan and pump motors with high-pressure Energy Speed study. As we all know, fan and pump speed transmission after switching to save a lot of electricity. Particular voltage motor, large capacity, energy-saving effect more pronounced. Study the economic reasonable high voltage motor drive is a major issue today.
Main research contents and the key technologies are as follows.
(1) high voltage, high current technology: dynamic, static pressure technology (6kV, 10kV circuit 3 inch thyristor in series, both static and dynamic pressure coefficient greater than 0.9); are streaming technology, high-power thyristor in parallel are streaming technology, both current coefficient greater than 0.85); surge absorption technology (10kV, 6kV loop); light-control technology and electromagnetic trigger (electrical / optical, optical / electrical transform); heat and cooling technology (mainly to solve the thermal conductivity and good heat dissipation, large output current technologies, such as heat pipe cooling technology); high voltage, high current system protection technology (expanding the current electromagnetic force structure and insulation design); equivalent load simulation.
(2) The application of new technology of power electronic devices: turn-off drive technology; dual PWM inverter technology; Cycle Converter / current model AC – DC – AC (CC / CSI0) Converter Technology (12 pulse inverter technology); AC excited synchronous machine variable speed operation technology; soft-switching PWM converter technology.
(3) all-digital Automation Control technology: Parameter Set-up; process optimization techniques since; fault diagnosis technology; object recognition technology since.
(4) of modern control technology: multi-variable decoupling control technology; vector control and direct torque control techniques; Adaptive Technology. [Popular Keywords]: Technology Inverter Comment Large In Small
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