RumA motor Germany RumA model RumA price

RumA motor is a type of motor that can be used in flammable and explosive environments, producing no electrical sparks during operation. Explosion-proof motors are mainly used in coal mines, oil and natural gas, petrochemical, and chemical industries. In addition, they are widely used in textiles, metallurgy, urban gas, transportation, grain and oil processing, papermaking, pharmaceuticals, and other sectors. As main power equipment, explosion-proof motors are typically used to drive pumps, fans, compressors, and other transmission machinery.

RumA motor performance

Although the working principle of the motor is similar to that of split-phase single-phase asynchronous motors, the former has a much larger rotor resistance than the latter. Therefore, compared with single-unit asynchronous motors, servo motors have three significant characteristics: 1, high starting torque. Due to the large rotor resistance, there is a clear difference compared to the torque characteristic curve of ordinary asynchronous motors. It allows the critical slip ratio S0 > 1, which not only makes the torque characteristic (mechanical characteristic) closer to linear but also provides a larger starting torque. Therefore, as soon as the stator receives control voltage, the rotor starts rotating immediately, exhibiting fast startup and high sensitivity. 2, wide operating range. 3, no self-rotation phenomenon. For a normally operating servo motor, as soon as the control voltage is lost, the motor stops immediately. When the servo motor loses control voltage, it operates in a single-phase state. Due to the large rotor resistance, the two torque characteristics generated by the interaction of the two oppositely rotating magnetic fields in the stator with the rotor (T1－S1, T2－S2 curves) and the resultant torque characteristic (T－S curve). The output power of AC servo motors is generally 0.1-100W. When the power frequency is 50Hz, voltages include 36V, 110V, 220, 380V; when the power frequency is 400Hz, voltages include 20V, 26V, 36V, 115V, and others. AC servo motors run smoothly with low noise. However, the control characteristic is nonlinear, and due to the large rotor resistance, losses are high and efficiency is low. Therefore, compared to DC servo motors of the same capacity, they are larger in volume and heavier in weight, making them suitable only for small-power control systems of 0.5-100W.

RumA motor speed regulation

Motor speed regulation: A hydraulic coupling is a hydraulic transmission device, generally consisting of a pump wheel and a turbine, collectively referred to as working wheels, housed in a sealed casing. The casing is filled with a certain amount of working fluid. When the pump wheel rotates driven by the prime mover, the fluid inside is pushed by the blades to rotate. Under the action of centrifugal force, it enters the turbine along the outer ring of the pump wheel, exerting thrust on the turbine blades in the same direction of rotation, thereby driving the production machinery. The power transmission capacity of the hydraulic coupling is consistent with the relative filling level of the fluid in the casing. During operation, changing the filling rate changes the turbine speed of the coupling, achieving stepless speed regulation. Its characteristics are: 1, wide power adaptation range, meeting the needs of different powers from tens of kilowatts to thousands of kilowatts; 2, simple structure, reliable operation, convenient use and maintenance, and low cost; 3, small size, large capacity; 4, convenient control and adjustment, easy to achieve automatic control. 5, this method is suitable for speed regulation of fans and water pumps. Variable frequency speed regulation range: 5-100 Hz stepless speed regulation. Below 50 Hz (60 Hz) is constant torque speed regulation; above 50 Hz (60 Hz) is constant power speed regulation. *The voltage boost of the variable frequency device ensures that the motor outputs rated torque at 5 Hz without burning out due to overheating. *Smooth torque at low speeds, no crawling phenomenon. *The motor can withstand 160% overload of rated torque for 1 minutes. Equipped with a gear transmission motor (friction wheel) with variable transmission ratio.

RumA motor mechanical characteristics

Motor features: small moment of inertia, low starting voltage, low no-load current; abandons the contact commutation system, greatly increasing motor speed, with a maximum speed of up to 100 000rpm; brushless servo motors can achieve control of speed, position, torque, etc., without an encoder during servo control; there is no brush wear, and in addition to high speed, it features long life, low noise, and no electromagnetic interference. Features of DC brushed servo motors: 1. Small volume, fast action and response, high overload capacity, wide speed regulation range. 2. High torque at low speed, small fluctuation, smooth operation. 3. Low noise, high efficiency. 4. Rear encoder feedback (optional) constitutes advantages of DC servo, etc. 5. Wide voltage transformation range, adjustable frequency. DC servo motors can be applied in spark erosion machines, manipulators, precision machines, etc. They can be configured with 2500P/R high-resolution standard encoders and tachometers, and can be additionally equipped with gearboxes, bringing reliable accuracy and high torque to mechanical equipment. Good speed regulation, highest output power per unit weight and volume, greater than AC motors, and far exceeding stepper motors. Small torque fluctuation in multi-stage structures. Servo motors are used in closed loops. That is, they constantly send signals to the system and correct their operation based on signals from the system. Servo motors can also be controlled by microcontrollers.

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