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TECHNICAL SERVICE

After Service
  • Type of work system

    Work system can be divided into continuous, short, periodic or aperiodic types. Periodic working system includes one or more specified constant duration of load, and the load during the running of the motor does not reach the thermal stability; non periodic work of load and speed usually changes in operating within the range.Working code usually indicated by S1~S10, the following are briefly introduced, we compare the common duty type. 1 S1 operating system: continuous working system; keep in co

  • The main indicators of the motor

    1, the efficiency η: motor output mechanical power and the input power ratio, usually expressed as a percentage.2, power factor cosφ: motor input active power and apparent power ratio.3, Stall current I1 (starting current Ist): motor at rated voltage, rated frequency and rotor blocked input from the power supply circuit maximum steady-state rms current.4, stall torque T1 (starting torque Tst): motor at rated voltage, rated frequency and blocked rotor torque generated when the minimum measured

  • Examples of walking single-phase of the three-phase asynchronous motor

    HM2-100L1-4-2.2KW three phase asynchronous motor for star connection. After starting 2 hours after normal output operation, still with full load, the motor speed is decreased rapidly, the winding heats up quickly, if you want to maintain the original speed operation, with only 60% of the rated load, once the motor stops will not re-start. Failure Analysis: the above phenomenon, multi-phase asynchronous motor walking single-phase. When a power failure, the star connection of the two-phase windin

  • The brush sparking too large solution

    1.Brush and commutator poor contact or brush wear too short; the grinding brush contact surface, replaced with new brushes. 2. Brush on uneven spring pressure: Proper adjustment of the spring pressure, so that each brush pressure maintained at 1.47 × 104 to 2.45 × 104Pa, also rely on the hand feeling. 3. Brush holder will loose brush holder bolts fastening the brush holder and parallel to the surface of the commutator; brush holder from the commutator surface distance is too large; adjust th

  • The winding wet processing method

    Winding wet processing method: (1) winding damp caused the ground should be dried, cooled to about 60 - 70 ° C, doused with the insulating paint after drying. (2) end winding insulation damage at the ground, re-insulated, painted, and then drying. (3) the winding ground point in the tank, should be re-wound windings or replacement of part of the winding element. Finally apply a different megger to measure, can meet the technical requirements.

  • Routine inspection and maintenance of the motor control system

    The motor control system by the switch, a small transformer, fuse, main contactors, relays, temperature, pressure sensing device, etc., is relatively complicated. Often need the help of a variety of fault, control schematic analysis investigation. Usually pay attention to maintain control box outside the clean and dry, no water, oil, on a regular basis with a small sweep fan blowing components and terminal box clean, the rafts dust, or brush clean with a brush dipped in cleaning appliances, so

  • Noise in the motor repair

    The normal operation of the motor should be issued a uniform and lighter buzzing sound, no noise, and special sound. Too much noise, electromagnetic noise, bearing noise, ventilation noise, mechanical friction sound, may be a sign of failure or malfunction phenomenon. Electromagnetic noise, electric motors fluctuated heavy sound, the cause may be the following. (1) non-uniform air gap between the stator and the rotor, the sound peaks and valleys and the high and low interval is the same, this

  • Motor pick the wrong line with what consequences?

    When the wrong motor connected in star delta connection, the motor still with a full load, the current flow through the stator windings exceed the rated current is to cause the motor self-parking, stop a little longer and not turn off the power, not only windingsevere overheating will be burned. When the star-connected motor wrong then into a triangle will windings and core overheating, severe burned wiring.

  • The burn the maintenance of a 55KW electric motor bearings overheating

    Analysis of inspection: from the appearance point of view to the front cover cracking, remove the check ended mouth elliptical, shaft misalignment, resulting in unilateral magnetic force, resulting in the running resistance and stall, the bearing damage. Repair methods: welding end caps, and eliminate welding stress treatment, only the mouth by correcting the replacement of the bearings and grease. The motor is running without vibration and overheating.

  • Motor overheating smoking causes and solutions

    The cause of the malfunction (1) power supply voltage is too high, the core greatly increase the heat; (2) power supply voltage is too low, the motor with a rated load operation, the current Ambassador of the winding fever; the ③ repair removal of winding, improper heat demolition method, burns core;④ stator and rotor core rubs; the ⑤ motor overload or frequent starting; ⑥ cage rotor broken bars; (7) motor phase loss, two-phase operation; the ⑧ weight around the stator winding dipping inade

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