Vehicle, motor drive control system, and motor default phase detection method and device
A phase loss detection and phase loss technology, which is applied in the field of motor drive control system, motor phase loss detection, vehicles, and motor phase loss detection devices, can solve problems such as uneven magnetic field, weak motor rotation, and increased electronic current. , to achieve the effect of saving detection cost, protecting the motor and preventing motor damage
Active Publication Date: 2020-07-03
BYD CO LTD
View PDF6 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] When a single-phase or multiple phases of a three-phase motor are out of phase, the electronic current increases sharply, and the magnetic field is severely uneven, resulting in abnormal motor vibration, weak motor rotation, reduced motor load performance and loud noise
However, the inventors of the present application found that there is a problem in the related technology that if there is a multi-phase loss, for example, there is no current in all three phases, it is impossible to detect whether there is a loss of phase
Moreover, the related technology detects the lack of phase by adding a phase loss protection circuit, and the cost is relatively high.
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
[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0031] A brief description will be given below of the phase loss detection method of the motor in the related art.
[0032] Phase loss means that in the three-phase circuit of the motor controller, one or more phases cannot work normally. Among them, the three-phase motor may have a phase loss fault due to poor contact, fuse blown, etc. If the motor runs without a phase, it may cause abnormal vibration of the motor, weak rotation, reduced load performance and loud noise, and even cause the motor to Short circuit, burning occurs....
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 vehicle, a motor drive control system, and a motor default phase detection method and device. The method comprises the following steps: obtaining the rotating speed of a motor, and obtaining the current torque of the motor; when the rotating speed of the motor is in a high rotating speed interval and the current torque of the motor is greater than a default phase detectiontorque, obtaining a three-phase phase current of the motor, and judging whether the motor has a default phase fault or not according to the current torque of the motor and the three-phase current ofthe motor. Through the torque and the current detection default phase of the motor, whether the motor has various default phase faults such as multi-phase default phase faults or not can be accuratelydetected, the motor is effectively protected, and motor damage is prevented. Moreover, defects are detected in a software mode, a defect phase protection circuit does not need to be additionally added, and the detection cost is saved.
Description
technical field [0001] The invention relates to the technical field of motor control, in particular to a motor phase loss detection method, a motor phase loss detection device, a motor drive control system and a vehicle. Background technique [0002] When a three-phase motor has a single phase or multiple phases missing, the electronic current increases sharply, and the magnetic field is severely uneven, resulting in abnormal motor vibration, weak motor rotation, reduced motor load performance and loud noise. In severe cases, the motor will be short-circuited and the motor will be burned. [0003] The related art proposes a method for detecting the lack of phase of the motor by detecting the unbalanced current of the three phases. However, the inventors of the present application found that there is a problem in the related art that if there is a multi-phase loss, for example, there is no current in three phases, it is impossible to detect whether the phase loss occurs. Mo...
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): G01R31/34
CPCG01R31/343
Inventor 熊通杜智勇肖恺
Owner BYD CO LTD