Mattke motor Germany Mattke model Mattke price

Mattke motors are named for their armature winding and field winding connected in series. Single-phase series-wound motors are AC/DC universal motors; they can operate on either AC or DC power supplies. The single-phase series-wound motor is widely used. Its advantages include high speed, high starting torque, compact size, light weight, resistance to stalling, and a wide applicable voltage range. Speed control can be achieved simply and easily by voltage adjustment.

Mattke motor maintenance method

Motor armature removal: Observe whether sparks are generated between the carbon brushes and the commutator during motor operation, and assess the severity of sparking. (1) indicates no sparks at all, meaning the carbon brushes and commutator are normal and require no repair; (2) indicates only 2 to 4 very small sparks. At this stage, carefully observe if the commutator surface is flat. In most cases, repair is not required; (3) indicates that besides r having 4 or more very small sparks with F, there are also 1 to 3 large sparks. In this case, it is not necessary to remove the armature; simply use sandpaper to polish the carbon brushes and commutator; (4) indicates that if 4 or more large sparks appear, the commutator must be polished with sandpaper, or even carefully machined on a lathe. At this point, the carbon brushes and armature must be removed. Of course, once the commutator has been machined, the carbon brushes must be replaced and bedded in. Removal method: Since vibration can damage the carbon brushes when removing the end caps and armature, the carbon brushes should first be taken out of the brush holders. Also, because the angles of the two brush holders relative to the commutator may not be identical, to ensure restoration to the original state during installation and to prevent swapping the left and right carbon brushes, marks must be made on the left and right carbon brushes before removal. Additionally, take care not to damage the contact surfaces between the carbon brushes and the commutator. One end of a high-speed motor generally has a cooling fan, while the other end may have a magnet or tachometer ring for speed measurement. Exercise extreme caution when removing the cooling fan blades, magnet, or tachometer ring to avoid damaging the fan blades or the speed-measuring magnet. Next, make a mark between the fan shaft sleeve or magnet shaft sleeve and the shaft so that they can be installed in the original marked positions after repair. Because the dynamic balance test of high-speed motors is performed with the fan blades or tachometer ring (speed-measuring magnet) attached, assembly must follow the marks made during disassembly. This is a minor detail in general motor repair, but I is critical in high-speed motor repair. If the tachometer ring or fan blades are damaged, or if they are not assembled according to the marks, even if other parts are repaired well, the entire machine may experience unbalanced vibration during high-speed operation. Do not use hammers, punches, or other tools for hard knocking or prying when disassembling high-speed motors; use a puller. When using a puller, note that the tip of the puller must press directly against the center hole, and a protective pad must be placed between the puller tip and the center hole to protect the center hole on the armature shaft from damage. Before disassembly, make marks on the upper and lower end caps to facilitate reassembly in the original configuration after repair. Clean the bearings removed from the armature with care, using clean aviation gasoline. After the gasoline has evaporated, fill the bearing housing with 7014 (or 7018) bearing grease (ordinary butter or molybdenum disulfide must not be used for high-speed motor bearings). Place in a clean area for later use. If the commutator surface is flat and has a purple luster, this oxide layer protects the commutator surface; simply remove surface powder with a soft brush.

Mattke motor fault handling

Motor winding short circuits are caused by insulation damage resulting from excessive motor current, large power supply voltage fluctuations, single-phase operation, mechanical damage, poor manufacturing, etc. They are classified as inter-turn short circuits, inter-winding short circuits, inter-pole short circuits, and inter-phase short circuits. 1. Fault phenomena: Uneven distribution of the magnetic field and unbalanced three-phase current cause increased vibration and noise during motor operation. In severe cases, the motor fails to start, and large short-circuit currents generated in the shorted coils cause rapid heating and burnout. 2. Causes: Long-term motor overload causes insulation aging and loss of insulating properties; insulation damage during winding insertion; moisture absorption in windings reduces insulation resistance, leading to breakdown; improper padding or damage to end and inter-layer insulation materials during shaping; damage to end connection wire insulation; insulation breakdown due to overvoltage or lightning strikes; insulation damage caused by friction between rotor and stator winding ends; metal foreign objects entering the motor interior and excessive oil contamination. 3. Inspection methods: (1) External observation. Check the junction box and winding ends for charring. Overheated windings leave a dark brown residue and emit an odor. (2) Temperature detection. Run no-load for 20 minutes (stop immediately if abnormalities are detected). Use the back of your hand to check if any part of the winding exceeds normal temperature. (3) Live test. Measure with an ammeter. If the current in one phase is excessively high, that phase has a short circuit. (4) Bridge check. Measure the DC resistance of each winding. The difference should generally not exceed 5%. If it does, the phase with lower resistance has a short-circuit fault. (5) Short-circuit detector method. If the tested winding has a short circuit, the steel laminations will vibrate. (6) Multimeter or megohmmeter method. Measure the insulation resistance between any two phase windings. If the reading is extremely low or zero, there is a short circuit between those two phases. (7) Voltage drop method. Connect the three windings in series and apply low-voltage safe AC power. The group with the lower reading has a short-circuit fault. (8) Current method. Run the motor no-load. First measure the three-phase currents, then swap two phases and measure again for comparison. If the readings do not change with the power swap, the phase with the higher current has a short circuit. 4. Short-circuit handling methods: (1) Short circuit at the winding ends. Insulate the short-circuit point with insulating material, or re-wrap the insulated wire, then varnish and bake dry. (2) Short circuit in the slot. Soften the winding, locate and repair the short-circuit point, reinsert into the slot, then varnish and bake dry. (3) For phase windings with fewer than 1/12 shorted turns, cut all shorted turns when connecting in series, connect the conductive parts to form a closed loop for emergency use. (4) If the number of shorted turns in the winding exceeds 1/12, completely remove and rewind.

Mattke motor energy-saving measures

Measures to improve motor efficiency. Motor energy saving is a systematic project involving the entire life cycle of the motor, from design and manufacturing to selection, operation, adjustment, maintenance, and disposal. The effectiveness of energy-saving measures must be considered over the motor's entire life cycle. Domestically and internationally, improving motor efficiency mainly focuses on the following aspects. Energy-efficient motor design refers to the use of modern design methods such as optimization design technology, new material technology, control technology, integration technology, and testing technology to reduce motor power losses and improve efficiency, thereby designing high-efficiency motors. While converting electrical energy into mechanical energy, the motor itself loses some energy. Typical AC motor losses are generally divided into fixed losses, variable losses, and stray losses. Variable losses change with load, including stator resistance losses (copper losses), rotor resistance losses, and brush resistance losses. Fixed losses are independent of load, including core losses and mechanical losses. Core losses consist of hysteresis losses and eddy current losses, which are proportional to the square of the voltage; hysteresis losses are also inversely proportional to frequency. Other stray losses include mechanical losses and other losses, such as bearing friction losses and windage losses caused by the rotation of fans and rotors.

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