SUMITOMO CYCLO motor, German SUMITOMO CYCLO model, SUMITOMO CYCLO price

SUMITOMO CYCLO motors refer to motors with speeds exceeding 10000r/min. Due to their high speed, their size is much smaller than that of ordinary motors of the same power. Connected directly to the prime mover, they eliminate traditional reduction gears. With low rotational inertia, high-speed motors offer advantages such as high power density, effective material savings, high transmission efficiency, low noise, and fast dynamic response.

SUMITOMO CYCLO motor applications

Motors refer to asynchronous motors powered by 220V AC single-phase supply. Because 220V power supply is very convenient and economical, and household electricity usage is also 220V, single-phase motors are not only widely used in production but are also closely related to people's daily lives. Especially with the increasing standard of living, the use of single-phase motors in household appliances is growing. Production applications include micro water pumps, grinding machines, threshers, crushers, woodworking machinery, and medical devices. Domestic applications include electric fans, hair dryers, exhaust fans, washing machines, and refrigerators. There are many types, but the power is relatively small. These motors typically have two-phase windings on the stator and a standard squirrel-cage rotor. Different distributions of the two-phase windings on the stator and different power supply conditions can produce different starting and operating characteristics.

SUMITOMO CYCLO motor mechanical characteristics

Motor mechanical characteristics: The torque of a single-phase series-wound motor varies with time, meaning the torque magnitude differs at every instant. This is significantly different from the smooth torque of DC motors; the output torque is effectively an average value. When the motor's magnetic circuit is not saturated, since the magnetic flux is proportional to the excitation current, the torque is proportional to the square of the current. When the motor's magnetic circuit is saturated, changes in current have little effect on magnetic flux, so the torque changes approximately in proportion to the current. High starting torque and resistance to stalling are valuable advantages of this type of motor, making it suitable for applications where starting is difficult. With constant applied voltage and an unsaturated magnetic circuit, an increase in load causes a corresponding increase in armature current, thereby increasing magnetic flux and resistive voltage drop. As known from the speed expression, the speed drops rapidly. Conversely, under no-load conditions, both current and magnetic flux are very small, resulting in very high no-load speed, which can easily damage the motor. For safety and motor protection, no-load operation should be avoided as much as possible. However, for series-wound motors used in power tools, since they generally carry a working head, the no-load speed will not be too high, and design often limits the no-load speed to around 1.7 times the rated speed. For very low-power series-wound motors, the no-load speed will not be extremely high due to their large inherent torque. As load increases, speed decreases, keeping the output power change minimal and preventing motor overload due to increased load. This characteristic makes these motors widely used in applications with large fluctuations in load torque, offering a wide speed regulation range. Regarding speed variation with load changes: when load increases, the current in the armature winding increases correspondingly. Since the stator excitation winding is in series with the armature winding, the current in the stator excitation winding is the same as that in the armature winding, thus also increasing. This increases the magnetic flux. Since magnetic flux is inversely proportional to speed, the speed decreases. The increase in current also increases the resistive voltage drop across various parts, causing the electromotive force to drop, which further causes the speed to decrease. Therefore, compared to the mechanical characteristics of DC motors, the mechanical characteristics of single-phase series-wound motors are softer, making speed control more difficult.

SUMITOMO CYCLO motor fault handling

Motor winding short circuits are caused by insulation damage due to excessive motor current, large power voltage fluctuations, single-phase operation, mechanical damage, or poor manufacturing. 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 cannot 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 insulation breakdown; improper padding or damage during shaping of end and inter-layer insulation materials; 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 falling into the motor interior and excessive oil contamination. 3. Inspection methods: (1) External observation method. Observe whether the junction box or winding ends are burnt. Overheated windings leave a dark brown color and emit a burning smell. (2) Temperature probe inspection 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 a certain phase is excessively high, it indicates a short circuit in that phase. (4) Bridge inspection. 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 extremely small or zero, it indicates a short circuit between those two phase windings. (7) Voltage drop method. Connect the three windings in series and apply low-voltage safe AC power. The group with the smaller 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 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 again. (2) Short circuit in the slot. Soften the winding, locate and repair the short-circuit point, place it back into the slot, then varnish and bake dry. (3) For each phase winding 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) When the number of shorted turns in the winding exceeds 1/12, completely remove and rewind.

Weidou Intelligent Technology specializes in selling German SUMITOMO CYCLO motors, SUMITOMO CYCLO motors, SUMITOMO CYCLO drives, SUMITOMO CYCLO synchronous motors, SUMITOMO CYCLO servo motors, SUMITOMO CYCLO DC motors, SUMITOMO CYCLO AC motors, SUMITOMO CYCLO stepper motors, SUMITOMO CYCLO synchronous motors, SUMITOMO CYCLO asynchronous motors, SUMITOMO CYCLO single-phase motors, SUMITOMO CYCLO three-phase motors, SUMITOMO CYCLO drive motors, SUMITOMO CYCLO geared motors, SUMITOMO CYCLO electric motors. SUMITOMO CYCLO original imports from Germany. Welcome inquiries and orders from users.