Motor drive circuit failure detection method
A technology of motor drive circuit and detection method, which is applied in the field of power electronics and can solve problems such as risks in the control system
Pending Publication Date: 2020-05-22
WUXI LEILI CONTROLS CO LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Aiming at the existing problem that it is impossible to determine whether the motor drive circuit is ineffective, which makes the entire control system risky, the present invention provides a detection method for the failure of the motor drive circuit, which can accurately determine whether the motor drive circuit is ineffective, thereby ensuring that the entire control system is at risk. The control system is operating normally
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] To facilitate a full understanding of various embodiments of the invention as defined in the claims, reference is made to the drawings and description thereof, which contain various specific details to aid that understanding but which should be considered as exemplary only Accordingly, those of ordinary skill in the art will recognize that changes and modifications of the various embodiments described herein can be made without departing from the scope of the invention as defined in the appended claims , and, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.
[0028] It will be apparent to those skilled in the art that the following descriptions of the embodiments of the present invention are provided for the purpose of explanation only and not for the purpose of limiting the invention as defined by the appended claims.
[0029] Such as figure 1 , figure 2 , image 3 , Figure 8 As shown, in a detection method for fa...
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
Login to View More Abstract
The invention provides a motor drive circuit failure detection method which can accurately judge whether the motor drive circuit fails or not so as to ensure normal operation of a whole control system. The three-phase motor obtains the three-phase current through a three-phase inverter circuit. The three-phase current is subjected to Clark conversion and Park conversion to obtain a real current magnitude and then the current value is compared with a set target current value which is inputted as a current loop; the generated error is subjected to PI operation, inverse Park conversion and SVPWMmodulation in sequence and then new three-phase current is generated. Whether the output of the motor drive circuit fails or not can be judged by judging whether the current of a certain new phase istwice that of other two phases and whether the synthesized current vector of the three-phase current of the three-phase motor is the same as the phase current of a certain phase or not.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a detection method for failure of a motor drive circuit. Background technique [0002] At present, the frequency conversion drive circuit of three-phase motor mostly adopts the three-phase bridge inverter circuit, which includes the power switching device unit and its drive unit, as well as the corresponding protection mechanism circuit. With the development of power electronics technology, the drive circuit Protection has become more and more perfect, such as commonly used over-current protection, over-voltage and under-voltage protection, power switch device conduction voltage drop detection, etc., but these protection methods focus on a specific function, and lack the overall motor drive circuit. The effective detection and protection of the output, such as a partial circuit failure in the motor drive circuit, does not necessarily cause the drive circuit to fail imme...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34H02H1/00
CPCG01R31/34H02H1/0007
Inventor 黄雨王明仁李坡
Owner WUXI LEILI CONTROLS CO LTD