- Variable Frequency Drive
- Three-Phase AC Induction Motor
- Explosion-Proof Motor
- Vehicle Motor Drive
- Motor Drive Controller
Monthly(weekly) periodical inspection, mainly refers to motor’s inspection and cleaning without dismantlement, including:
(1) The measurement of insulation resistance. When the insulation resistance is small, get rid of the dust attached to winding, and have dry processing if necessary.
(2) The temperature measurement of every parts. As for important motor, use thermometer to measure and record the temperature of every parts, record the environment temperature at the same time, so as to observe the temperature rise change.
(3) The measurement of vibration. As for large-scale motor or motor of great importance, use vibrometer to measure the vibration condition of the motor.
4.Yearly(half year to two years) maintenance
According to different usage, every half year to two year we should dismantle the motor, clean the interior of it, add grease, repair ill place and replace the bad parts.
A chart about three-phase induction motor’s maintenance is below.
|The maintenance of three-phase induction motor|
|Inspection area||Inspection contents||Methods||Standard||Maintenance content||Maintenance period|
|Surrounding environment||1.Environment temperature||Thermometer||No exceed of stipulated temperature||Improve ventilation condition||Daily|
|2.If there is water, oil and corrosive liquid entering into the interior of motor||Visual observation||No allowance||Prevent from entering into inside of motor||Daily|
|3.If there is accumulation of dust and dirt||Visual observation||No allowance||Clear away||Daily|
|Power supply||1.Voltage||Voltmeter||Fluctuating within ±5% of rated value||Inspect power supply||Daily|
|2.Frequency||Frequency meter||Fluctuating within ±5% of rated value||Inspect power supply||Daily|
|Stator||1.Current||Ampere meter||Below the rated value||Thermorelay setting correct||Daily|
|2.Temperature rise||Alcohol thermometer, temperature sensing by hand||Below the stipulated value||Daily|
|3.If the inlet and outlet area is smooth||Visual observation, temperature sensing by hand||Keep smooth||Clean||Daily|
|4.Winding insulation resistance||Tramegger||Above 0.5MΩ during operation||Dry||Every month (week)|
|5.Winding insulation weathering and crack, bindings slack||Visual observation||Should be none||Bind well and dip with paint||Every half year to two years|
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