Bonani motor Germany Bonani model Bonani price

Bonani motors are a type of motor that changes speed by altering the number of magnetic pole pairs, voltage, current, frequency, and other parameters to achieve higher performance. Due to their excellent performance, adjustable-speed motors are widely used in industrial sectors such as steel, power plants, cables, chemicals, petroleum, cement, textiles, printing and dyeing, papermaking, and machinery for stepless speed control of loads with constant torque or decreasing torque. They are particularly suitable for driving pumps and fans with significant flow variations, achieving good energy-saving results.

Bonani motor mechanical characteristics

High motor efficiency: By embedding permanent magnet materials in the rotor, the rotor and stator magnetic fields operate synchronously during normal operation. There is no induced current in the rotor windings, eliminating rotor resistance and hysteresis losses, thereby improving motor efficiency. 2. High power factor: Since there is no induced current excitation in the PMSM rotor, the stator winding presents a resistive load, and the motor's power factor is close to 1, reducing stator current and improving motor efficiency. Meanwhile, the improved power factor enhances the grid quality factor, reduces losses in transmission and distribution lines, allows for reduced transmission and distribution capacity, and saves on grid investment. 3. High starting torque: In equipment requiring high starting torque (such as oilfield pumping unit motors), smaller-capacity permanent magnet motors can replace larger-capacity Y series motors. If 37kW permanent magnet synchronous motors replace 45kW ～ 55kW Y series motors, the phenomenon of "oversized motor driving small load" is effectively addressed, saving on equipment investment costs and improving system operational efficiency. 4. Good power-performance indicators: When Y series motors operate at 60% load, efficiency drops by 15%, power factor drops by 30%, and power-performance indicators drop by 40%; whereas the efficiency and power factor of PMSM drop only slightly. When the motor is at only 20% load, its power-performance indicators remain above 80% of full load. 5. Low temperature rise: There is no resistance loss in the rotor windings, and almost no reactive current in the stator windings, resulting in low motor temperature rise. 6. Small size, light weight, and less material consumption: For the same capacity, the volume, weight, and material usage of permanent magnet synchronous motors can be reduced by approximately 30%. 7. Allows for large air gaps, facilitating the construction of new magnetic circuits. 8. Low armature reaction and strong overload resistance.

Bonani motor starting methods

Motor starting methods include direct starting and reduced-voltage starting. Reduced-voltage starting includes: autotransformer compensation starting, star-delta switching starting, and extended-delta starting. Generally, small and medium-sized squirrel-cage asynchronous motors can be started directly; direct starting equipment is simple and the method is straightforward. However, starting current is high and starting torque is low. Large-capacity squirrel-cage asynchronous motors generally start by reducing the voltage at the stator winding terminals. Reduced-voltage starting can decrease starting current, but inevitably reduces starting torque as well. The various reduced-voltage starting methods are described below: Autotransformer compensation starting: Starting voltage = voltage reduction coefficient × rated voltage; Starting current = voltage reduction coefficient × starting current (direct); Starting torque = square of voltage reduction coefficient × starting torque (direct). Characteristics of the starting method: The motor stator winding starts via an autotransformer for voltage reduction, and the autotransformer is disconnected after starting. Pros and cons: 1 Low starting current, 2 Starting control equipment cannot handle frequent starts, 3 Equipment is relatively expensive, but starting torque is higher than that of star-delta switching, so it is widely used. Star-delta switching starting: Starting voltage = 0.577 × rated voltage; Starting current = 1/3 × starting current (direct); Starting torque = 1/3 × starting torque (direct). Characteristics of the starting method: The motor stator winding is connected in star configuration during starting and switched to delta configuration after starting. Pros and cons: 1 Low starting current, 2 Low starting torque, 3 Can handle frequent starts, 4 Low price, suitable for motors with delta-connected stator windings, generally used for light-load starting of small-capacity motors. Extended-delta starting: Starting voltage = 0.78 × rated voltage (depends on stator winding tap voltage); Starting current = 0.6 × starting current (direct); Starting torque = 0.6 × starting torque (direct). Characteristics of the starting method: The motor stator winding is connected in extended-delta configuration during starting and switched to delta configuration after starting. Pros and cons: 1 Relatively low starting current, 2 Relatively high starting torque, 3 Can handle frequent starts, 4 Only applicable to motors with intermediate taps in the stator winding. Secondly, soft starters and variable frequency drives are now widely used. They are convenient to control and can be promoted for small-capacity equipment. However, they should be used with caution for large-capacity, high-voltage motors. Although this technology is mature, the presence of non-linear components in the circuit generates significant harmonic pollution to the power supply. Despite the availability of harmonic mitigation equipment, highly irregular waveforms still exist in low-voltage lines, affecting the normal operation of office electronic equipment and potentially causing capacitor breakdown in the circuit.

Bonani motor development trends

The successful development of heat-resistant, high-magnetic-performance neodymium-iron-boron permanent magnet materials will enable their important application in high-power permanent magnet synchronous motors. Demand for high-power electric motors is growing in transportation and industry, such as in electric vehicles, hybrid (internal combustion engine and electric motor) vehicles, trains, elevators, machine tools, and robots. Marine propulsion motors require low speed and high torque. Traditional motors are difficult to use in special environments such as high temperature, high vacuum, or confined spaces, whereas rare-earth permanent magnet motors can withstand high temperatures (referring to samarium-cobalt or high-heat-resistance neodymium-iron-boron magnets) and are compact, meeting these special requirements. Motors operating in special environments, such as manipulators in aerospace equipment, inspection robots in nuclear energy equipment, and semiconductor manufacturing devices, require high-temperature and high-vacuum motors. Developed models include 150W and 3000r/min, three-phase four-pole permanent magnet motors operating in high temperatures of 200℃ ～ 300℃ and a vacuum level of 133.3×10-6Pa, with a diameter of 105mm and length of 145mm, using Sm2Co17 permanent magnets with good high-temperature characteristics.

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