For most low-voltage high-power, high-voltage, inverter motors, will increase the winding temperature measurement and bearing temperature measurement such as dynamic monitoring devices to ensure the safety of motor operation.
Many motor manufacturers, as well as some professional repair units, to be buried in the winding temperature measurement element coil straight edge, in order not to affect the normal operation of the winding, for the use of electromagnetic round wire winding, the temperature measurement element should be manufactured to try to small; and for the use of moulding winding motor, the temperature measurement element probe should be made into a piece of mounting, and can not be protruding from the coil of the external dimensions, and also can be a substitute for stator slot wedge Part of the stator slot wedge.
Low voltage frequency motor winding temperature measurement element probe shell, most of the metal materials, metal materials, good thermal conductivity at the same time, to meet the winding process is difficult to avoid mild deformation. However, for high-voltage motors, variable frequency motors, due to the uneven distribution of field strength of the winding, or higher field strength factors, the probe shell try to adopt better insulation properties, thermal conductivity of suitable ceramic materials, but attention must be paid to the operation process of the probe protection to prevent damage to the probe shell.
For the existence of shaft current risk of motor bearing system, different control measures, the bearing temperature measurement element requirements are different, when the use of insulated end caps, insulated bearing bushings and other measures to cut off the circuit, in addition to the insulation of the motor fastening link, if you want to increase the bearing temperature measurement device, probe and its fixed components, should be used to have the insulating properties of the material, the probe shell is generally made of ceramic materials, the fixed components have an insulating plastic material. The probe housing is generally made of ceramic and the fixing elements are made of plastic materials with insulating properties.
Post time: Dec-29-2023
