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Fault monitoring method and device for brushless DC motor

A brushed DC motor and fault monitoring technology, applied in the direction of single motor speed/torque control, motor generator testing, etc., can solve the problems of secondary faults, small fault probability, and inability to monitor power tube faults in real time.

Active Publication Date: 2015-11-04
BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After the brushless DC motor is started, although a certain degree of fault monitoring can be realized, the fault monitoring is only limited to setting several simple fault detection circuits in the motor circuit to protect the control and drive circuits of the motor. , such as DC voltage overvoltage protection, undervoltage protection and current overcurrent protection, it is impossible to monitor power tube failures, Hall sensor failures, winding failures, etc. online in real time
According to statistics, the probability of two or more failures occurring simultaneously in high-power brushless DC motors of civil aircraft is very small, and generally occurs in the form of a single failure. However, if the failure is not identified in time and appropriate fault-tolerant control or redundancy management is adopted, two failures will occur Therefore, it is of great significance to timely and effectively monitor the faults of brushless DC motors.

Method used

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  • Fault monitoring method and device for brushless DC motor
  • Fault monitoring method and device for brushless DC motor
  • Fault monitoring method and device for brushless DC motor

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Experimental program
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Embodiment 1

[0028] figure 1 The flow chart of the brushless DC motor fault monitoring method provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation of online real-time monitoring of motor faults after the brushless DC motor is started. This method can be used by the brushless DC motor fault The monitoring device is implemented, and the device makes full use of the calculation and processing resources of the brushless DC motor control circuit microprocessor, and is set in the microprocessor of the control circuit in the form of a fault diagnosis module, specifically including the following steps:

[0029] S101. Obtain the sensing information required for motor control in real time.

[0030] Wherein, the sensing information includes bus current, winding current, and the relationship between the output signal of the position sensor and the working state of the motor. In terms of obtaining the sensing information, the signal acquisition source is co...

Embodiment 2

[0043] Figure 2a It is a flow chart of the brushless DC motor fault monitoring method in the second embodiment of the present invention. On the basis of the above technical solutions, each fault diagnosis module is further explained.

[0044] see Figure 2a and Figure 2b As shown, the brushless DC motor fault monitoring method specifically includes the following steps:

[0045] S201. The fault monitoring device is powered on.

[0046] S202. The comprehensive control module included in the fault monitoring device receives the power-on detection command sent by the host computer and sends it to the self-detection module. Among them, the integrated control module is used to receive external instructions, and obtain all the sensory information and distribute it to each fault diagnosis module, and make each fault diagnosis module work in coordination, and send health information to the host computer after forming a health conclusion. The integrated control module is also use...

Embodiment 3

[0065] Figure 6 It is a structural schematic diagram of the brushless DC motor fault monitoring device in the third embodiment of the present invention. see Figure 6 As shown, the brushless DC motor fault monitoring device includes:

[0066] An information acquisition module 601, configured to acquire the sensory information required for motor control in real time;

[0067] The position sensor fault diagnosis module 602 is configured to perform fault diagnosis on the position sensor by comparing the acquired sensing information with preset fault information, and generate a diagnosis result;

[0068] The drive circuit power tube fault diagnosis module 603 is used to perform fault diagnosis on the drive circuit power tube by comparing the acquired sensing information with the preset fault information, and generate a diagnosis result;

[0069] The winding fault diagnosis module 604 is configured to perform fault diagnosis on the winding by comparing the acquired sensing info...

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Abstract

The invention discloses a fault monitoring method and device for a brushless DC motor. The method includes acquiring sensing information required by motor control; performing fault diagnosis on a position sensor, a driving circuit power tube and a winding through comparing the obtained sensing information and preset fault information and generating a diagnosis result; and sending a motor adjustment instruction determined according to the diagnosis result to a brushless DC motor control module and sending the diagnosis result to an upper computer. According to the invention, a problem that related faults cannot be monitored continuously once the brushless DC motor is started is solved; multiple fault online real-time monitoring of the brushless DC motor is realized and fault identifying results can be sent and stored for facilitating motor tolerance control and rear-stage quick maintenance by motor maintainers.

Description

technical field [0001] Embodiments of the present invention relate to fault diagnosis technology, in particular to a fault monitoring method and device for a brushless DC motor. Background technique [0002] With the development of multi-electric technology for civil aircraft, the research and application of high magnetic energy and rare earth permanent magnet materials, and the emergence of high-power semiconductor drive devices, the application of high-power brushless DC motors in fuel systems and flight control actuation systems will become more and more important. more and more common. As a kind of electromechanical equipment, brushless DC motors have hidden dangers of failure in long-term operation. Through the development of health monitoring technology for brushless DC motors, it can provide technical support for fault-tolerant control of brushless DC motors and rapid troubleshooting and maintenance of aircraft systems. [0003] In the state monitoring of high-power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08G01R31/34
Inventor 崔世蒙卿新林白志强刘志方
Owner BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC
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