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Brushless direct current motor DSP logical control program design method based on Petri net

A brushed DC motor and logic control technology, applied in the field of DSP logic control of brushless DC motors, can solve the problems of difficulty in avoiding program logic errors, cumbersome DSP logic control program design and debugging, and difficulty in obtaining reliable logic control programs, etc. Achieve the effect of avoiding logical errors and easy analysis

Inactive Publication Date: 2019-10-08
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The design and debugging of the traditional brushless DC motor DSP logic control program is cumbersome, and verification and testing usually rely on manual repeated debugging and trial and error. It is difficult to avoid logic errors in the program and obtain a reliable logic control program.

Method used

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  • Brushless direct current motor DSP logical control program design method based on Petri net
  • Brushless direct current motor DSP logical control program design method based on Petri net
  • Brushless direct current motor DSP logical control program design method based on Petri net

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Embodiment

[0052] Such as figure 1 As shown, in the brushless DC motor drive circuit of this embodiment, the stator windings of the motor are connected in star form, and the inverter adopts a three-phase full-bridge inverter circuit, and the power supply mode is two-two conduction. The rotor position is detected by the Hall sensor, the pulse width signal output by the sensor is 180° electrical angle, and the phase difference of the three Hall signal outputs is 120°, such as figure 2 , image 3 shown. The controller processes the position signal to output commutation information, and drives the VT on the three bridge arms of the inverter circuit 1 ~VT 6 The relationship between power tube, Hall sensor status and commutation is shown in the following table:

[0053]

[0054]

[0055] The design method of the described brushless DC motor DSP logic control program based on Petri net, comprises the following parts:

[0056] 1) Establish the Petri net model of the Hall sensor

[0...

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Abstract

The invention relates to a brushless direct current motor DSP logical control program design method based on a Petri net. The method obtains a Petri net of a power tube by performing modeling on a Hall sensor and a steering control variable of a brushless direct current motor, and a Petri net model is visual and understandable and is easy to analyze. The method provided by the invention calculatesa state set of a brushless direct current motor dynamical system by virtue of a Petri net reachable graph algorithm and verifies one by one according to trapezoidal commutation logics to judge whether requirements are met, if the requirements are not met, the Petri net model of the system is redesigned, and logical errors in a program are avoided. The method provided by the invention gives a brushless direct current motor logical control mathematical expression and sets a foundation for DSP logical control program design, and description logical control of the mathematical expression is morerigorous and clearer.

Description

technical field [0001] The present invention relates to the field of DSP logic control of brushless direct current motor, more specifically, relates to a design method of DSP logic control program of brushless direct current motor based on Petri net, so as to ensure the correctness and reliability of the logic program. Background technique [0002] A common DC brushless motor consists of a motor body, a power drive circuit and a position sensor. The stator of the motor body is an armature winding, and the material of the rotor is a permanent magnet. The rotor generates a rotating magnetic field inside the motor, and the armature winding is energized in a corresponding logical order to generate a corresponding rotating magnetic field. The two magnetic fields interact to generate a rotating torque, realizing brushless normal operation of the motor. The position sensor detects the position of the motor rotor in real time, converts the magnetic position signal of the rotor into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/25257
Inventor 詹瑜坤罗继亮聂卓赟张兵付雨豪
Owner HUAQIAO UNIVERSITY
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