Cause Analysis of Burnout of Stainless Steel Fountain Pump

Stainless steel fountain pump manufacturers tell us that all commercially available motor protector, all through the collection of current or voltage changes in the value, so as to achieve the purpose of protecting the motor; but due to various causes of motor bearing damage, rotor eccentric, and then cause the motor sweep So that these protector can not achieve the protection of the function, because only when the motor sweep after the winding burnout short circuit, and such protector will move, but it is too late; to So far there is no one for the protection of motor bearings products; many users can only use artificial time monitoring or regular inspection test the temperature changes in the bearing method, some of the large motor artificially protected.
Ordinary motor driven by the inverter, the life of a significant shortening, serious, a few months on the stator winding damage. Which led to the shutdown caused a huge loss to the enterprise. The cause of the motor damage is that the frequency converter produces a high spike voltage on the stator windings of the motor, and the magnitude of the spike voltage exceeds the insulation strength of the windings, resulting in damage to the windings. The peak voltage will reach more than three times the rated operating voltage of the inverter. For example, for a frequency converter with a rated voltage of 380V, the spike voltage exceeds 1200V. This spike voltage per second on the motor stator winding impact thousands of times, will soon lead to damage to the stator windings. In addition, the inverter will produce bearing current in the motor bearing, bearing a long time through the bearing current, will cause the bearing burned, the smaller the power of the motor, the stator winding more easily damaged; the greater the power of the motor easily damaged.