CN-121995178-A - Motor detection system and method for port machinery

CN121995178ACN 121995178 ACN121995178 ACN 121995178ACN-121995178-A

Abstract

The invention belongs to the technical field of measuring equipment, and particularly relates to a motor detection system and a detection method for port machinery, wherein the motor detection system for port machinery comprises a controller, a magnetic core, a magnetic field detection unit and a bias magnetic field output unit; when the magnetic core is sleeved on a tested wire, the controller is configured to detect a magnetic field intensity change curve through the magnetic field detection unit, and when the magnetic field intensity change curve is abnormal, the controller is further configured to drive the bias magnetic field output unit to output a corresponding bias magnetic field so as to adjust the magnetic field intensity change curve.

Inventors

CHAO JIE
LIU JINGXIAO
YANG JIADI
LI XIAOMENG

Assignees

徐州徐工港口机械有限公司

Dates

Publication Date: 20260508
Application Date: 20260312

Claims (10)

1. A motor detection system for port machinery, comprising: a controller, a magnetic core, a magnetic field detection unit and a bias magnetic field output unit, wherein The magnetic field detection unit and the bias magnetic field output unit are respectively positioned at the outer side of the magnetic core and are respectively electrically connected with the controller; the controller is configured to detect a magnetic field strength variation curve by the magnetic field detection unit when the magnetic core is sleeved on the tested wire, and When the magnetic field intensity change curve is abnormal, the controller is further configured to drive the bias magnetic field output unit to output a corresponding bias magnetic field so as to change the magnetic field direction of the external magnetic field, namely, guide the external magnetic field to avoid the magnetic field detection unit, and further adjust the magnetic field intensity change curve.
2. The motor detection system for harbour machinery of claim 1, wherein, The abnormality of the magnetic field intensity change curve comprises that the magnetic field intensity value in the magnetic field intensity change curve reaches a detection upper limit value or fluctuates or is suddenly changed in reverse direction.
3. The motor detection system for harbour machinery of claim 2, wherein, The magnetic field detection unit includes a detection coil; the detection coil is wound on the magnetic core and is electrically connected with the controller; The controller is configured to detect a magnetic field intensity variation curve through the detection coil, and when the magnetic field intensity variation curve is abnormal, the controller is further configured to drive the bias magnetic field output unit to output a corresponding bias magnetic field.
4. The motor detection system for harbour machinery of claim 3, wherein, The bias magnetic field output unit comprises a first bias magnetic field output coil and a second bias magnetic field output coil; the first bias magnetic field output coil and the second bias magnetic field output coil are respectively wound on the magnetic core, the detection coil is positioned between the first bias magnetic field output coil and the second bias magnetic field output coil, and the first bias magnetic field output coil and the second bias magnetic field output coil are electrically connected with the controller; When the magnetic field intensity change curve is abnormal, the controller is configured to drive the first bias magnetic field output coil and the second bias magnetic field output coil to respectively output corresponding bias magnetic fields.
5. The motor detection system for harbour machinery of claim 4, wherein, When the magnetic field intensity value in the magnetic field intensity change curve reaches the detection upper limit value, the controller is configured to drive the first bias magnetic field output coil and the second bias magnetic field output coil to output a changed bias magnetic field, namely the magnetic field intensity of the bias magnetic field decreases according to a first set value until the magnetic field intensity value in the magnetic field intensity change curve is smaller than the detection upper limit value and the magnetic field intensity change curve tends to be straight.
6. The motor detection system for harbour machinery of claim 4, wherein, When the magnetic field intensity value in the magnetic field intensity change curve fluctuates, the controller is configured to drive the first bias magnetic field output coil and the second bias magnetic field output coil to output a changed bias magnetic field, namely the magnetic field intensity of the bias magnetic field increases or decreases according to a second set value until the magnetic field intensity change curve tends to be straight.
7. The motor detection system for harbour machinery of claim 4, wherein, When the magnetic field intensity value in the magnetic field intensity change curve is suddenly changed in the reverse direction, the controller is configured to drive the first bias magnetic field output coil and the second bias magnetic field output coil to output a changed bias magnetic field, namely the magnetic field intensity of the bias magnetic field is gradually increased according to a third set value, and when the bias magnetic field output by the first bias magnetic field output coil and the second bias magnetic field output coil is changed at least three times, the magnetic field intensity values in the magnetic field intensity change curve are suddenly changed in the reverse direction, and the controller judges that the power supplies of the first bias magnetic field output coil and the second bias magnetic field output coil are reversely connected.
8. A motor insulation detection method using the motor detection system for a harbour machine according to any one of claims 1 to 7, comprising: a magnetic field detection unit and a bias magnetic field output unit are arranged on the outer side of the magnetic core; Sleeving the magnetic core on a tested wire, and detecting a magnetic field intensity change curve by a controller through a magnetic field detection unit; When the magnetic field intensity change curve is abnormal, the controller drives the bias magnetic field output unit to output a corresponding bias magnetic field so as to adjust the magnetic field intensity change curve.
9. A non-transitory readable storage medium having stored thereon a computer program/instruction which when executed by a processor implements the steps of the method of claim 8.
10. A computer program product comprising computer programs/instructions which, when executed by a processor, implement the steps of the method of claim 8.

Description

Motor detection system and method for port machinery Technical Field The invention belongs to the technical field of measuring equipment, in particular relates to a device for measuring an electric variable, and particularly relates to a motor detection system and a motor detection method for port machinery. Background The motor for the harbour machinery needs to carry out insulation detection when using, and in the motor insulation detection field, the circuit on the motor is insulated and detected through detection equipment (a precise magnetic field sensor, a high-frequency current transformer and the like), and the motor works to generate a power frequency magnetic field, and external equipment (a transformer and the like) can also generate a magnetic field, namely, the external magnetic field can influence the precision of the detection equipment on the magnetic field intensity of a detected wire, so that the motor insulation detection is inaccurate. At present, in order to overcome the influence of an external magnetic field, the existing detection equipment is provided with a specific detection coil according to the power of a motor, but cannot adapt to the insulation detection of motors with different powers, and has poor compatibility. Therefore, development of a new motor detection system and detection method for port machinery is needed to solve the technical problem that the detection equipment cannot adapt to insulation detection of motors with different powers. It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and therefore the above description is not to be construed as constituting prior art information. Disclosure of Invention The embodiment of the disclosure at least provides a motor detection system and a motor detection method for port machinery. In a first aspect, an embodiment of the disclosure provides a motor detection system for a harbor machine, which includes a controller, a magnetic core, a magnetic field detection unit and a bias magnetic field output unit, wherein the magnetic field detection unit and the bias magnetic field output unit are respectively located at the outer sides of the magnetic core, the magnetic field detection unit and the bias magnetic field output unit are respectively electrically connected with the controller, when the magnetic core is sleeved on a tested wire, the controller is configured to detect a magnetic field intensity change curve through the magnetic field detection unit, and when the magnetic field intensity change curve is abnormal, the controller is further configured to drive the bias magnetic field output unit to output a corresponding bias magnetic field so as to change the magnetic field direction of an external magnetic field, namely, guide the external magnetic field to avoid the magnetic field detection unit, and further adjust the magnetic field intensity change curve. In an alternative embodiment, the abnormality of the magnetic field strength variation curve includes the magnetic field strength value in the magnetic field strength variation curve reaching a detection upper limit value or a fluctuation or reverse mutation. In an alternative embodiment, the magnetic field detection unit comprises a detection coil, the detection coil is wound on a magnetic core and is electrically connected with a controller, the controller is configured to detect a magnetic field strength change curve through the detection coil, and when the magnetic field strength change curve is abnormal, the controller is further configured to drive the bias magnetic field output unit to output a corresponding bias magnetic field. In an alternative implementation mode, the bias magnetic field output unit comprises a first bias magnetic field output coil and a second bias magnetic field output coil, wherein the first bias magnetic field output coil and the second bias magnetic field output coil are respectively wound on a magnetic core, the detection coil is positioned between the first bias magnetic field output coil and the second bias magnetic field output coil, the first bias magnetic field output coil and the second bias magnetic field output coil are electrically connected with a controller, and when a magnetic field intensity change curve is abnormal, the controller is configured to drive the first bias magnetic field output coil and the second bias magnetic field output coil to respectively output corresponding bias magnetic fields. In an alternative embodiment, after the magnetic field strength value in the magnetic field strength variation curve reaches the detection upper limit value, the controller is configured to drive the first bias magnetic field output coil and the second bias magnetic field output coil to output the varied bias magnetic field, that is, the magnetic field strength of the bias magnetic field decreases according to the first set value un