Sensorless accurate commutation method and device of brushless DC motor
A brushless DC motor and sensor technology is applied in the field of sensorless precise commutation of brushless DC motors, which can solve the problems of misjudging the commutation signal by a single chip, reducing the operating efficiency and control performance of the system, and achieving stable operation and improving operation. Efficiency and stability, the effect of high system accuracy
Inactive Publication Date: 2018-09-28
张懿
1 Cites 4 Cited by
AI-Extracted Technical Summary
Problems solved by technology
View more
Method used
View more
Abstract
The invention discloses a sensorless accurate commutation method and device of a brushless DC motor. The sensorless accurate commutation method comprises the steps of respectively connecting an A-phase voltage line, a B-phase voltage line and a C-phase voltage line of the brushless DC motor to corresponding voltage acquisition devices, triggering commutation service interrupt by jump edges of induction voltage waveforms of three phases A, B and C; entering commutation service interrupt if the jump edges are descending edges, and changing states of corresponding MOS tubes and IGBTs to achieve commutation after delaying by 30 electrical angels; performing triggering by ascending edges if the jump edges are ascending edges, starting to count in a circulation way from 0, entering commutation service interrupt when a counting value is 2, changing the states of the corresponding MOS tubes and IGBTs to achieve commutation after delaying by 30 electrical angels, and resetting the counter. Thecommutation method has the advantages of high interrupt service trigger and good reliability, a commutation misjudgment accident of the brushless DC motor is prevented under the interference of a demagnetization accident, and the commutation moment is scientifically and simply judged.
Application Domain
Commutation monitoringElectronic commutators
Technology Topic
Three-phaseDC motor
Image
Examples
- Experimental program(1)
Example Embodiment
PUM


Description & Claims & Application Information
We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
Similar technology patents
Automatically-aligned numerical control cutting method for pre-printed image plate
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Lithium battery electrolyte based on sulfate additive
Owner:WUHAN UNIV
Sodium alginate-agar dual-network high-strength natural hydrogel material, and preparation method thereof
Owner:HUBEI UNIV OF TECH
Controllable synthesis method of nickel phosphide micro-nano material
Owner:LIAONING INST OF SCI & TECH
Petroleum pipeline supporting device with adjustable size
Owner:CHENGDU LAIBAO PETROLEUM EQUIP
Classification and recommendation of technical efficacy words
- Simple and efficient operation
- avoid distractions
Integrated ion sensor
Owner:MIDDLELAND SENSING TECH
Experimental apparatus for non-constant debris flow
Owner:ZHEJIANG UNIV OF TECH
Method for remote control of domestic network apparatus
Owner:GLOBAL INNOVATION AGGREGATORS LLC
Intelligent self-propelled sprayer based on image processing
Owner:ANHUI AGRICULTURAL UNIVERSITY
Physical simulation test device and method for convergence of debris flows into rivers
Owner:SOUTHWEST PETROLEUM UNIV