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Digitalized control method and device for pulse power source

A technology of pulse power supply and control method, which is applied in the direction of electric pulse generator circuit and active components to generate pulses, etc., can solve the problems of low integration and achieve the effect of improving performance

Inactive Publication Date: 2012-02-08
INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although CPLD is also a programmable logic device, it is based on the EEPROM technology, and its integration level is low. With MicroCell (comprising combination part and register) as the basic unit, it is suitable for combinational logic operations, but the control algorithm of the present invention is sequential logic control, which is not suitable for Using CPLD

Method used

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  • Digitalized control method and device for pulse power source
  • Digitalized control method and device for pulse power source
  • Digitalized control method and device for pulse power source

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Embodiment 1

[0032] Arbitrary waveform pulse power requires a controller with fast response time and high tracking accuracy for a given waveform.

[0033] The mainstream products of FPGA are VIRTEX-6 (high-performance series) and SPARTAN-6 (low-cost series) of XILINX Company, Stratix-IV (high-performance series) and Cyclone-IV (low-cost series) of ALTERA Company. Among the present invention, FPGA adopts Cyclone-II series product of ALTERA company, and Cyclone II device provides 4,608 to 68,416 logic elements (LE), and has a whole set of best functions, including embedded 18-bit x18-bit multiplier, special-purpose external memory Interface circuit, 4kbit embedded memory block, phase-locked loop (PLL) and high-speed differential I / O capability. Cyclone-II series product has EP2C5, EP2C8, EP2C15, EP2C20, EP2C35, EP2C50, EP2C70, how many internal resources are different, according to the control method of the present invention, FPGA adopts EP2C35F672, and it is FBGA package, totally 672 pins, ...

Embodiment 2

[0040] refer to Figure 4 , is a schematic diagram of the main circuit of the power supply controlled by the digital controller of the pulse power supply provided by the present invention. In the second embodiment, the main circuit structure of the arbitrary waveform pulse power supply is an IGBT topology in which m=5 IGBTH bridges are connected in series to form a unit, and n=10 units are connected in parallel. Figure 5 Shown is an enlarged view of the series structure of 5 IGBT H-bridges in each parallel unit in the main circuit of the power supply.

[0041] Refer again Figure 6 , for control Figure 4 The digital controller component layout diagram of the main circuit of the pulse power supply shown. The main circuit of the power supply with the above structure has 50 IGBT H-bridges, that is, 100 IGBT gates need to be controlled. Therefore, the digital controller must generate 2×m×n=100 PWM signals.

[0042] combine Figure 4 and Figure 6 , Figure 4 The output si...

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Abstract

The invention discloses a digitalized control method for a pulse power source, wherein the digitalized control method is used for controlling a main power supply loop which comprises n units connected in parallel, and each unit comprises an IGBT (Insulated Gate Bipolar Transistor) topological structure formed by connecting m IGBT H (Half) bridges in series. The method comprises the steps of: setting a carrier with a given waveform and the frequency F2 in a programmable logic device; inputting a given clock signal into the programmable logic device; calling the given waveform once every a given waveform period; calling the carrier once every 1 / (F2*m) and 1 / (F2*n) in a given waveform bottom width duration, wherein the carrier is not called beyond the given waveform bottom width duration; and scaling a difference value obtained by subtracting an output current value of the main power source loop from the called given waveform, adding a scaled product to the output current value of the main power supply loop, subtracting the output value from n equalized currents, comparing an obtained current-equalization difference value and an obtained reverse-phase difference value with the called carrier respectively to obtain 2*m*m PWM (Pulse-Width Modulation) signals which are used for controlling the main power source loop. The invention further provides a device for realizing the method.

Description

technical field [0001] The invention relates to the technical field of pulse power supplies, in particular to a digital control method for pulse power supplies. [0002] The present invention also relates to a device for realizing the digital control method of the above-mentioned pulse power supply. Background technique [0003] The arbitrary waveform pulse power supply outputs pulse current or voltage, and the arbitrary waveform switching pulse power supply is composed of IGBT topology, and the IGBT works in the switching state. According to the characteristics of IGBT, the average value of IGBT output voltage is: [0004] V 0 =DV d (1) [0005] After the filtering network, the average value of the load current is: [0006] I 0 =KDV d (2) [0007] in: [0008] V 0 is the average value of the IGBT output voltage, I 0 is the average value of the load current, V d is the IGBT collector voltage; [0009] D is the duty ratio of IGBT gate trigger pulse, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/021
Inventor 沈莉黄川唐靖宇
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACAD OF SCI
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