Research on DC/DC Power Parallel Technology

MOS power IC full range

KKST patch plug-in active passive crystal oscillator hot sale 24.576000MHZ

Five authorized agents - original - spot technical support

Summary:

High-power DC power supplies are used in large quantities in Tokmak installations, either high voltage or high current. The FCPS-Fast Control Power Supply, which is a plasma-constrained power supply, is a DC power source that requires a maximum current of 20,000 amps and 50 volts. The requirements for this DC power supply are as follows:

1. The capacity of a single DC power supply is IMW (20000A/50V):
2. When necessary, two power supplies can be operated in parallel;
3. The DC power supply can operate in four quadrants;
4. The system response time is approximately 5ms;
5. Output current tracks a given current curve

For such a high DC power supply, a single DC/DC power supply unit is difficult to implement. Therefore, a parallel technology of a DC/DC power supply device using a domino structure is proposed.

For the research of DC fast-control power supply devices used in Tokmak devices, the main task is to control and transform electrical energy. The DC/DC conversion circuit is a conversion circuit in the power electronic converter technology, which can convert an uncontrollable DC voltage into a controllable DC voltage, also called a DC chopper, which is widely used in an adjustable DC power supply. The full control device acts as a fast switch in the chopper circuit to control the magnitude of the output voltage. The higher the switching frequency, the higher the chopping efficiency, the smaller the ripple of the output voltage, and the faster the speed and sensitivity. The high frequency of the full control device makes the traditional chopping current rich in full optimization. The chopper has three modes of operation: pulse width modulation, frequency modulation, and frequency modulation. In the implementation of chopper circuit, there are commonly used buck chopper circuit (Buck), boost chopper circuit (Boost), buck-boost circuit (Buck-Boost), Cook Chopper circuit (Cuk) and full bridge. The five basic forms of chopper circuits. With the increase of the operating frequency of fully-controlled devices, the application of choppers is more and more extensive. In the design research of this system, the circuit of DC/DC DC power supply adopts bridge chopper circuit, and the modulation mode adopts pulse width modulation mode or PWM mode.

The research and experiment of this subject is to solve the problem of high-power power supply of the Tokemak device and other devices that require high-power DC power supply (single DC power supply can not meet the requirements). Power parallel technology is a difficult problem in the field of power electronics. DC/DC power supply parallel technology is a new idea and research program. The related ideas have been put forward abroad, but so far there is no exact research program at home and abroad, and no prototypes and products are available. There are some problems in the parallel connection of power supply, which are difficult to solve. It has its research value. The experimental research on DC/DC power supply parallel technology in the field of high-power DC power supply has high practical application value.



DC-DC power supply parallel control principle block diagram



Detailed diagram of DC-DC power supply parallel control principle



Logic switching and delay circuit



DC-DC power supply parallel system structure diagram

See the upload document for details.