Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Dead-beat direct torque control and implementation method based on sliding mode strategy

A technology of direct torque control and implementation method, which is applied in the direction of single motor speed/torque control, control system, motor control, etc. It can solve the problems of reducing the control performance of the motor speed control system and weakening chattering, so as to improve the anti-interference ability, suppress chattering, and improve the effect of convergence speed

Inactive Publication Date: 2021-08-13
ZHENGZHOU UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the discontinuous switch control in the sliding mode control, chattering becomes an inherent characteristic of the sliding mode control system, which will reduce the control performance of the motor speed control system to a certain extent. How to weaken the chattering while ensuring the dynamics of the system Performance has important research significance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dead-beat direct torque control and implementation method based on sliding mode strategy
  • Dead-beat direct torque control and implementation method based on sliding mode strategy
  • Dead-beat direct torque control and implementation method based on sliding mode strategy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as figure 1 As shown, a dead-beat direct torque control and implementation method based on sliding mode strategy includes the following steps:

[0053] Step 1, with a given rotor angular velocity ω * and measure the rotor angular velocity ω k The deviation of the speed is used as the input quantity, and the speed deviation ω * -ω k Input to anti-disturbance sliding mode controller, output torque given value

[0054] Among them, the reaching law in the anti-disturbance sliding mode controller is:

[0055]

[0056]

[0057] The calculation formula of the sliding mode surface information function s is:

[0058]

[0059] In the formula, x is the system state variable, δ is the exponent of the power term, λ and α are the minimum and maximum values ​​that δ can reach respectively, β is the coefficient of the constant term for adjusting the rate of change of δ, and ε is the coefficient of the power term of variable exponent; γ is the state variable index;...

Embodiment 2

[0088] This embodiment provides a deadbeat direct torque control system based on a sliding mode strategy, including:

[0089] Speed ​​sensor for measuring the angular velocity ω of the motor rotor k ;

[0090] Anti-disturbance sliding mode controller (NASMC) for a given rotor angular velocity ω * and the rotor angular velocity ω measured by the rotational speed sensor k Deviation output torque given value

[0091] The power sensing device is used for sensing the phase current of the stator three-phase winding of the motor;

[0092] The coordinate transformation module is used to convert the phase currents of the three-phase windings of the stator of the motor to obtain the two-phase current i in the two-phase static αβ coordinate system through Clark transformation α and i β After that, set i α and i β The two-phase current in the two-phase rotating dq coordinate system is obtained by Park transformation and use and calculated After that, output the result t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a dead-beat direct torque control and implementation method based on a sliding mode strategy. The method comprises the following steps: firstly, providing an anti-disturbance sliding mode controller which can provide a quick and accurate reference torque for a DBDTC; introducing an extended sliding mode disturbance observer into a rotating speed loop controller, and estimating system disturbance through the disturbance observer and compensating the system disturbance to the sliding mode controller; and designing a sliding mode disturbance observer in a torque ring to compensate a voltage error caused by parameter disturbance so as to improve the anti-interference capability of the system. In order to solve the problem of inherent buffeting in sliding mode control, a novel variable exponential power reaching law is provided. According to the reaching law, a system state variable is introduced into an exponential term of a power reaching law, so the system reaching speed is related to a system state; and a variable exponential term is added into the power reaching law, so the reaching speed of the system away from a sliding mode surface is further improved. Through the method, the novel reaching law improves the convergence speed of the system while effectively inhibiting buffeting.

Description

technical field [0001] The invention belongs to the field of motor control, and in particular relates to a deadbeat direct torque control and a realization method based on a sliding mode strategy. Background technique [0002] Permanent magnet synchronous motor (PMSM) has the advantages of simple structure, high power density and high efficiency, and has been widely used in high-precision CNC machine tools, robotics, aerospace and other fields. Deadbeat Direct Torque Control (DBDTC) calculates the reference voltage vector according to the motor mathematical model and acts on the motor, so as to track the reference value of torque and flux linkage within one sampling period. In the traditional DBDTC method, the PI controller is used to output the reference torque. When the load changes suddenly or the parameters are perturbed, the control performance of the PI controller is not ideal. Because the accurate reference torque cannot be generated quickly, it may even cause deadbea...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P21/00H02P21/13H02P21/14H02P21/30H02P25/022H02P27/08
CPCH02P6/08H02P21/0007H02P21/13H02P21/14H02P21/30H02P25/022H02P27/08H02P2207/05
Inventor 王要强朱亚昌刘陈秦明王克文梁军
Owner ZHENGZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com