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Optimization method for realizing SVPWM based on RISC-V

A RISC-V, optimization method technology, applied in the control of generators, electronic commutation motor control, control systems, etc., can solve problems such as increasing CPU loss, and achieve the effect of reducing burden, reducing calculation, and being easy to realize digitally.

Inactive Publication Date: 2019-04-19
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] The operation of trigonometric and inverse trigonometric functions in the traditional SVPWM algorithm increases the CPU loss in the process of real-time control

Method used

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  • Optimization method for realizing SVPWM based on RISC-V
  • Optimization method for realizing SVPWM based on RISC-V
  • Optimization method for realizing SVPWM based on RISC-V

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings. A method for implementing an SVPWM optimization algorithm based on RISC-V in the present invention includes a sector judgment unit; a voltage vector action time calculation unit; a voltage space vector switching point calculation unit; and a PWM waveform generation unit.

[0050] Sector judgment: through the reference voltage V ref To calculate the variable θ, to find the value of H, through the value of H, compare the corresponding relationship between H and the sector to obtain the sector number where it is located.

[0051] Calculate the voltage vector action time: through the DC bus voltage U d , sampling period T s , three-phase stator voltage U α , U β To calculate the T of each sector 1 , T 2 .

[0052] Calculate the switching point of the voltage space vector: the T calculated by the voltage vector action time calculation unit 1 , T 2 , through the volta...

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Abstract

The invention discloses an optimization method for realizing SVPWM based on RISC-V. The optimization method comprises four steps of: firstly, determining a sector in which a reference voltage Vref islocated by means of a voltage space vector rotation amplitude; secondly, calculating action time T1 and T2 of a basic voltage vector in each sector; thirdly, calculating a voltage space vector switching point in each sector; and finally generating SVPWM modulation waveforms. The optimization method analyzes and improves the traditional SVPWM algorithm, thereby reducing the calculation loss of a trigonometric function of the traditional SVPWM algorithm through digitization, thereby reducing the consumption of CPU resources.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous motor control, in particular to a method for realizing an SVPWM optimization algorithm based on RISC-V. Background technique [0002] The RISC-V instruction set is an open instruction set architecture (ISA) based on the principle of reduced instruction set computing (RISC). RISC-V is a new instruction established on the basis of the continuous development and maturity of the instruction set. The RISC-V instruction set is completely open source, simple in design, easy to port to Unix systems, modular in design, and complete tool chain. Etc. RISC-V is as open as Linux (including RTL), and as efficient and low-energy as ARM. [0003] With the development of power electronics technology, technologies such as variable frequency power supply, motor control, and AC variable frequency speed regulation have made great progress. Space vector pulse width (SVPWM) technology is more widely used i...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P25/024H02P27/08
CPCH02P21/00H02P27/08H02P2207/05H02P25/024
Inventor 王超高强王文思侯立刚
Owner BEIJING UNIV OF TECH
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