Check patentability & draft patents in minutes with Patsnap Eureka AI!

A detection device and detection method for an open circuit fault of a brushed DC fan

An open-circuit fault detection device technology, applied in the field of fans, can solve the problems of inaccurate judgment of open-circuit faults, fan jitter, noise, etc., and achieve the effect of avoiding fan jitter and misjudgment, and strong practicability

Active Publication Date: 2021-10-12
江苏春博电子科技有限公司 +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The voltage detection method needs to shut down the fan drive frequently, which will cause fan vibration and noise, which will affect the operation of the fan and the life of components to a certain extent. There is a certain risk in the occasion, and it is impossible to accurately determine whether an open circuit fault occurs
For example, in the cooling fan system of an automobile engine, if the cooling fan is subjected to a large headwind and the fan is in the power generation state, and the actual speed of the fan is greater than the output speed of the fan drive, the current detected at this time is zero, which will be wrong. Judging that the fan is open

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
  • A detection device and detection method for an open circuit fault of a brushed DC fan
  • A detection device and detection method for an open circuit fault of a brushed DC fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the scope of protection.

[0017] A detection device for an open circuit fault of a brushed DC fan, such as figure 2 As shown, it includes motor drive Q1, fan M1, and sampling resistor R4. Resistors R2 and R3 are connected to the positive pole of the fan connector, and both ends of R3 are connected to a single-chip microcomputer for AD function sampling. Both ends of the resistor R4 are connected to a voltage operational amplifier processing device. and a single-chip microcomputer, a capacitor C1 is connected to both ends of the R3, and a resistor R1 is connected to both ends of the motor driver Q1.

[0018] A method for detecting an open-circuit fault of a brushed DC fan, the specific steps are as follows:

[00...

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 discloses a detection device and method for an open-circuit fault of a brushed DC blower, which comprises the following steps: during the operation stage of the blower, detect the current flowing through the blower in real time; if the current is greater than zero, it is considered that the blower has no open-circuit fault; If the current is zero, further turn off the MOSFET driving the fan, and detect the positive voltage of the fan connector after a delay of 1 millisecond. If the voltage value is zero, it is determined that the fan has an open circuit fault. The combination of current detection and voltage detection can accurately detect the open circuit fault of the fan.

Description

technical field [0001] The invention belongs to the field of fans and relates to the technical field of fan fault detection, in particular to a detection device and a detection method for an open-circuit fault of a brushed DC fan. Background technique [0002] For the automobile industry, brushed DC fans are widely used in cooling systems. Traditional automobiles use speed-regulating resistors to adjust the speed of fans, which cannot realize stepless speed regulation and fan status monitoring, and cannot meet energy-saving requirements. In order to change the above disadvantages, DC Fan controllers are introduced into automotive cooling systems. According to the requirements of the vehicle system, the fault type of the fan cooling system needs to be reported to the vehicle. The open circuit fault is a kind of fan fault, which has a great impact on the reliability of the fan and the controller. Compared with other faults, it is more difficult to diagnose. When the fan is r...

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 Patents(China)
IPC IPC(8): G01R31/54
Inventor 张恺钰唐建勋邓福军邱斌武许战锋
Owner 江苏春博电子科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com