Buhler Motor motor, German Buhler Motor model, Buhler Motor price

Buhler Motor motors are a new generation of gear reduction motors, featuring compact size, low noise, maintenance-free operation, and an attractive appearance. The speed ranges from 0.83r/min to 300r/min. This series of low-speed motors is a new high-tech product that integrates electromagnetic drive and reduction mechanism within the motor housing. The low speed and high torque can directly meet customer requirements without the need for additional reduction devices. The motors use Class B and Class F insulation, with protection ratings of IP44 and IP55, and voltages of 220V and 380V.

Buhler Motor motor fault troubleshooting

Motor winding short circuits are caused by insulation damage resulting from excessive motor current, large fluctuations in supply voltage, single-phase operation, mechanical damage, or poor manufacturing. These include turn-to-turn short circuits, coil-to-coil short circuits, pole-to-pole short circuits, and phase-to-phase short circuits. 1. Fault symptoms: uneven magnetic field distribution 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 occurs during winding insertion; damp windings reduce insulation resistance, leading to insulation breakdown; end and inter-layer insulation materials are improperly padded or damaged during shaping; end connection wire insulation is damaged; overvoltage or lightning strikes cause insulation breakdown; friction between the rotor and stator winding ends causes insulation damage; metal foreign objects fall into the motor interior, or there is excessive oil contamination. 3. Inspection methods: (1) External observation method. Check the junction box and winding ends for charring. Overheated windings leave a dark brown residue with a burnt smell. (2) Temperature detection method. Run under no-load for 20 minutes (stop immediately if abnormalities are detected) and use the back of your hand to check if any part of the winding exceeds normal temperature. (3) Power-on test method. Measure with an ammeter; if the current in one phase is excessively high, it indicates a short circuit in that phase. (4) Bridge measurement. Measure the DC resistance of each winding. Generally, the difference should 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 sheet will vibrate. (6) Multimeter or megohmmeter method. Measure the insulation resistance between any two phase windings. If the reading is very small or zero, it indicates a phase-to-phase short circuit between those two windings. (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 under 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 treatment methods: (1) Short circuit at the winding end. Insulate the shorted point with insulating material, or re-wrap with insulated wire, then varnish and bake dry. (2) Short circuit inside the slot. Soften the winding, locate and repair the short circuit, place it back 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 the winding.

Buhler Motor motor structure

The motor mainly consists of the stator, rotor, and end shields. The stator is made of laminated sheets pressed together to reduce iron losses during motor operation and contains three-phase AC windings, known as the armature. The rotor can be solid or made of pressed laminations, with permanent magnet materials mounted on it. Depending on the position of the permanent magnet material on the rotor, permanent magnet synchronous motors can be divided into two structural forms: surface-mounted and interior-mounted. Figure 1 shows the corresponding schematic diagrams. The surface-mounted rotor has a simple magnetic circuit structure and low manufacturing cost, but since starting windings cannot be installed on its surface, asynchronous starting is not possible. The interior-mounted rotor's magnetic circuit structure mainly includes radial, tangential, and hybrid types, totaling 3 kinds. The main difference between them lies in the relationship between the magnetization direction of the permanent magnets and the rotor rotation direction. Figure 2 shows the magnetic circuit structures of 3 different forms of interior-mounted rotors. Since the permanent magnets are placed inside the rotor, the rotor surface can be shaped into pole shoes. Inserting copper bars or cast aluminum into the pole shoes provides starting and damping functions, resulting in good steady-state and dynamic performance. Additionally, due to the asymmetry of the interior-mounted rotor's magnetic circuit, reluctance torque is generated during operation, which helps improve the motor's power density and overload capacity. This structure also facilitates field weakening for speed expansion.

Buhler Motor motor common issues

Motor issues: 1. After the adjustable speed motor accelerates, the speed gradually decreases until it stops. In this situation, observe the changes in the ammeter pointer in the motor's electrical cabinet. If the indicated current increases sharply, overload protection devices such as the thermal relay of the main motor will inevitably trip, disconnecting the three-phase power supply and stopping the main motor. At this point, carefully check the wiring components in the main motor circuit and the AC contactor of the main motor. Check whether the wiring terminals of all overload protection devices, such as thermal relays in the adjustable speed motor's electrical cabinet, are loose or have poor contact causing heating. If these areas have problems, the poor contact between wires and components in the circuit will cause a rapid increase in current after the main motor accelerates, leading to protective shutdown. When the adjustable speed motor runs at low speeds, the working current of the main motor is small, so the speed will not gradually decrease and stop. However, when the adjustable speed motor accelerates, the electrical load is high, and faults in electrical components become apparent. In actual work, it is sometimes observed that terminal blocks in the adjustable speed motor's electrical cabinet heat up due to poor wire contact, or even develop oxide layers at the connections. The wire insulation may appear burnt and discolored. These issues seriously affect the normal operation of the main drive motor. Operators must take immediate measures, such as cleaning the contact surfaces of terminal blocks and wires, tightening wiring screws, removing oxide layers from burnt wires, and replacing severely damaged terminal blocks. 2. The main drive motor produces significant noise during operation. To adjust the dynamic balance of the slip motor, balancing weights are installed at both ends of the armature and pole rotor. If these devices become slightly loose, the slip motor will deviate from its original position during high-speed rotation. If the fault occurs on the outer surface of the main drive motor, it will cause local friction between the armature and the pole rotor, increasing noise. In this case, stop the machine for repair, restore the dynamic balance of the armature and pole rotor, re-locate and secure the original balancing weights to ensure the main drive motor operates normally.

Weidou Intelligent Technology specializes in selling German Buhler Motor motors, Buhler Motor motors, Buhler Motor drives, Buhler Motor synchronous motors, Buhler Motor servo motors, Buhler Motor DC motors, Buhler Motor AC motors, Buhler Motor stepper motors, Buhler Motor synchronous motors, Buhler Motor asynchronous motors, Buhler Motor single-phase motors, Buhler Motor three-phase motors, Buhler Motor drive motors, Buhler Motor reduction motors, Buhler Motor electric motors. Buhler Motor products are original imports from Germany. Customers are welcome to inquire and order.