Motor stall fault detection method, detection device and new energy sanitation vehicle
By calculating the motor input power and resistor power consumption, and combining other operating parameters, we can determine whether the blockage occurs, which solves the problem of misjudgment and inapplicability of sensorless control motors in the existing technology, and achieves high-accuracy blockage fault detection.
CN119738713APending Publication Date: 2025-04-01SHANGHAI XIRE ENERGY VEHICLE CO LTD +2
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Patent Information
- Application Number
- CN202411937742.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-04-01
AI Technical Summary
Technical Problem
In the prior art, the motor blockage fault detection method is easy to be misjudged, and the speed detection method is not applicable to motors without sensor control.
Method used
By calculating the motor input power and resistor power consumption, and combining the command current, feedback speed and time count, we can determine whether the blockage occurs. The specific steps include determining the system status, calculating the motor power, judging the motor status and performing blocking and timeout counting management.
Benefits of technology
It improves the accuracy of motor blocking and fault detection, avoids misjudgment, and is suitable for motors without sensor control, with a detection success rate of 100%.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention discloses a motor stall fault detection method, a detection device and a new energy sanitation vehicle, and relates to the technical field of motor stall detection, including: determining that the system state machine and the speed control mode state machine are in a normal state and the command speed is in a uniform speed stage, calculating the motor input power and the resistor power consumption; when the motor input power>0 and the filtered q-axis command current>current threshold and the filtered feedback speed<speed threshold, judging: when the resistor power consumption>0.5*motor input power, the stall timeout count+1, when the stall time≥time threshold, the stall timeout count is assigned, the three-phase short circuit fault action position is set, and the rotor stall fault fault position is set. The present invention determines whether a fault occurs based on the motor operation data, the motor input power and the motor resistance power consumption. It is much easier to obtain the motor resistance power consumption than to obtain the motor output power, and is suitable for scenes where the motor output power cannot be accurately obtained or calculated.
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