Pulse wavelength modulation (PWM) generator based on field programmable gate array (FPGA)

A generator, PWM signal technology, applied in the direction of pulse duration/width modulation, etc., can solve the problems of multi-channel PWM signal calculation amount is large, digital control affects control accuracy and other problems, to achieve high reliability, strong anti-interference ability, reduce The effect of hardware design cost

Inactive Publication Date: 2013-06-26
ZHEJIANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above-mentioned technical problems existing in the prior art, the present invention provides an FPGA-based PWM generator, which can solve the problems of large amount of computation for generating multiple PWM signals, and the delay of digital control that affects the control accuracy.

Method used

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  • Pulse wavelength modulation (PWM) generator based on field programmable gate array (FPGA)
  • Pulse wavelength modulation (PWM) generator based on field programmable gate array (FPGA)
  • Pulse wavelength modulation (PWM) generator based on field programmable gate array (FPGA)

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Embodiment approach 3

[0038] For a magnitude comparator, when the input value of the first input terminal is less than the input value of the second input terminal, the output terminal outputs 1, otherwise the output terminal outputs 0; for the selector, when the signal received by the control terminal is 0, the output terminal outputs For the signal of the first input terminal, when the signal received by the control terminal is 1, the output terminal outputs the signal of the second input terminal. For D flip-flops, when the rising edge of the clock terminal arrives, the Q output terminal outputs the signal of the D input terminal; this embodiment The working principle of the triangular carrier generating unit is as follows:

[0039] Set the input carrier peak value PEAK and clock CLK, and add 1 or subtract 1 to the COUNTER at the rising edge of each clock. If the current operation is plus 1, when the COUNTER counts to equal to PEAK, the output of BT1 becomes 1, and the output of S2 becomes 1. At th...

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Abstract

The invention discloses a pulse wavelength modulation (PWM) generator based on field programmable gate array (FPGA). The generator comprises an FPGA, wherein the FPGA is loaded with a decoding interface unit, a triangular carrier generating unit and n PWM signal generating units. The novel PWM signal generator disclosed by the invention can be realized by combining with FPGA hardware programming language and FPGA circuit design software tool, so as to better solve the problem in a high-power electronic system that the precision is affected since computation is heavy and digital control is delayed due to multiple paths of PWM signals; the carrier frequency, the dead time and the enable signal can be designed according to demands of the system, and the application range is wide and flexible application to various situations is realized; and meanwhile, the PWM generator still has the advantages of high reliability, reduced hardware design cost, strong antijamming capability and the like when being applied to other PWM signal generating circuits.

Description

Technical field [0001] The invention belongs to the technical field of signal modulation, and specifically relates to a PWM generator based on FPGA. Background technique [0002] As a kind of programmable hardware FPGA (Field Programmable Gate Array) that is increasingly widely used, it blurs the boundary between software and hardware in the control system. When using FPGA for circuit design, it is easy to use software programming to modify the hardware circuit, realize the repeatable design and modification of the hardware, and greatly reduce the cost of directly using hardware for design. [0003] In the control system design of power electronic systems, the application of FPGA has also received more and more attention. In high-power power electronic systems, due to the limitations of voltage and current levels on devices, parallel, cascaded, and multi-level forms are often used to make power electronic circuits reach sufficient power levels. Therefore, the control system needs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K7/08
Inventor 陈国柱王冕贺超田野
Owner ZHEJIANG UNIV
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