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

Initial startup method for biaxial contra-rotating permanent-magnet brushless direct-current motor

A permanent magnet brushless DC, a pair of technology, applied in the direction of the starter of a single DC motor, the deceleration device of the AC motor, the motor generator/starter, etc., can solve the problems that the invention cannot be realized, the description is not clear, etc., to achieve No start-up dead zone problem, avoid table look-up method, accurate calculation of angle

Inactive Publication Date: 2015-05-20
NORTHWESTERN POLYTECHNICAL UNIV
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, because there are many unclear descriptions in the description of the invention, those of ordinary skill in the art cannot realize the invention.

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
  • Initial startup method for biaxial contra-rotating permanent-magnet brushless direct-current motor
  • Initial startup method for biaxial contra-rotating permanent-magnet brushless direct-current motor
  • Initial startup method for biaxial contra-rotating permanent-magnet brushless direct-current motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0054] Such as image 3 The shown dual-axis counter-rotating permanent magnet brushless DC motor drive control system consists of DSP, CPLD, IPM, position detection module, voltage and current detection module, voltage conversion module, and communication module.

[0055] Formulate the first stage commutation control table

[0056] Step 1. According to the position signals of the inner rotor U, V, W, A, compile the inner rotor state code D, 0≤D≤11, D∈N;

[0057] Step 2. Prepare the outer rotor position code Z according to the outer rotor U, V, W, and A position signals, 0≤Z≤11, Z∈N;

[0058] Step 3. Superimpose the angle intervals of the inner and outer rotors, that is, θ=θ 1 +θ 2 , if θ≥360°, let θ=θ-360°;

[0059] a. IF 0°≤θ<60°C=0;

[0060] b. IF 60°≤θ<120°C=1;

[0061] c. IF 120°≤θ<180°C=2;

[0062] d. IF 180°≤θ<240°C=3;

[0063] e. IF 240°≤θ<300°C=4...

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 an initial startup method for a biaxial contra-rotating permanent-magnet brushless direct-current motor. According to the method, a startup process is divided into two stages according to the characteristics of an initial startup process of the biaxial contra-rotating permanent-magnet brushless direct-current motor; at the first stage, aiming at the two-phase-conduction three-phase-star-shape six-state driven biaxial contra-rotating permanent-magnet brushless direct-current motor, a first-stage phase commutation control table of the biaxial contra-rotating permanent-magnet brushless direct-current motor in initial 144 states of inner and outer rotors is formulated according to an advanced phase commutation principle; a conduction code calculation method is summed up through the initial phase commutation control table, and a conduction code can be quickly calculated in a DSP (Digital Signal Processor) without querying a phase commutation table, so as to realize the initial rotation of the motor.

Description

technical field [0001] The invention relates to an initial starting method of a double-shaft counter-rotating permanent-magnet brushless direct-current motor, which can realize safe and reliable starting of the double-shaft counter-rotating permanent-magnet brushless direct-current motor. Background technique [0002] In ordinary permanent magnet brushless DC motors, only the rotor poles rotate, and its armature is stationary. The double-shaft counter-rotating permanent magnet brushless DC motor based on the principle of action force and reaction force is driven by electromagnetic torque to make the inner and outer rotors rotate in opposite directions at the same time. In the underwater counter-rotating propulsion system, the dual-axis counter-rotating permanent magnet brushless DC motor is used in conjunction with the counter-rotating propeller, which can significantly improve the propulsion efficiency of the underwater vehicle and eliminate the roll caused by the rotation ...

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): H02P6/20
CPCH02P1/18
Inventor 张克涵王司令季小尹宋保维胡欲立严卫生
Owner NORTHWESTERN POLYTECHNICAL 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