wittenstein motor Germany wittenstein model wittenstein price

wittenstein motor refers to a low-power single-phase asynchronous motor powered by a single-phase AC power supply (AC220V). This type of motor typically has two-phase windings on the stator, and the rotor is of the standard squirrel-cage type. Different distributions of the two-phase windings on the stator and different power supply conditions can produce different starting and operating characteristics.

wittenstein motor performance

The output torque of the motor decreases as the speed increases, and drops sharply at higher speeds, so its maximum operating speed is generally between 300 and 600RPM. AC servo motors provide constant torque output, meaning they can deliver rated torque within their rated speed (generally 2000RPM or 3000RPM), and provide constant power output above the rated speed. Four, different overload capabilities: Stepper motors generally do not have overload capability. AC servo motors have strong overload capability. Five, different operating performance: Stepper motor control is open-loop control; if the starting frequency is too high or the load is too large, step loss or stalling is likely to occur. If the speed is too high during stopping, overshoot is likely to occur. Therefore, to ensure control accuracy, acceleration and deceleration must be handled properly. AC servo drive systems are closed-loop control; the driver can directly sample the feedback signal from the motor encoder, internally forming position and speed loops, generally avoiding the step loss or overshoot phenomena seen in stepper motors, resulting in more reliable control performance. Six, different speed response performance: It takes 200 to 400 milliseconds for a stepper motor to accelerate from standstill to operating speed (generally several hundred RPM). AC servo systems have better acceleration performance; taking the Sanyo 400W AC servo motor as an example, it takes only a few milliseconds to accelerate from standstill to its rated speed 3000RPM, making it suitable for control applications requiring rapid start-stop. In summary, AC servo systems are superior to stepper motors in many performance aspects. However, stepper motors are often used as actuator motors in applications with lower requirements. Therefore, in the design of control systems, factors such as control requirements and cost must be comprehensively considered to select the appropriate control motor.

wittenstein motor classification

Motors generally have the same working principles and application characteristics as DC motors, but their composition is different. In addition to the motor itself, the former has an additional commutation circuit, with the motor and commutation circuit closely integrated. Many low-power motors have the motor body and commutation circuit integrated into one unit; externally, brushless DC motors look exactly like DC motors. The motor body of a brushless DC motor is the electromechanical energy conversion part. In addition to the armature and permanent magnet excitation, it also includes sensors. The motor body is the core of the brushless DC motor; it not only affects performance indicators, noise and vibration, reliability, and service life, but also involves manufacturing costs and product costs. The use of permanent magnet fields allows brushless DC motors to break away from the traditional design and structure of general DC motors, meeting the requirements of various application markets and developing towards copper saving, material saving, and simplified manufacturing. The development of permanent magnet fields is closely related to the application of permanent magnet materials. The application of third-generation permanent magnet materials has promoted the development of brushless DC motors towards high efficiency, miniaturization, and energy saving. To achieve electronic commutation, position signals are required to control the circuit. Early systems used electromechanical position sensors to obtain position signals, but now electronic position sensors or other methods are gradually being used. The simplest method is to use the potential signal of the armature winding as the position signal. To control motor speed, a speed signal is required. Speed signals are obtained using methods similar to those for position signals. The simplest speed sensor combines a frequency-measuring tachogenerator with electronic circuits. The commutation circuit of a brushless DC motor consists of drive and control parts, which are difficult to separate, especially in low-power applications where they are often integrated into a single dedicated IC. In higher-power motors, the drive circuit and control circuit can be separate. The drive circuit outputs electrical power to drive the motor's armature winding and is controlled by the control circuit. Drive circuits have shifted from linear amplification to pulse-width modulation (PWM) switching states, and corresponding circuit compositions have shifted from discrete transistor circuits to modular integrated circuits. Modular integrated circuits include power bipolar transistors, power field-effect transistors, and insulated-gate bipolar transistors (IGBTs). Although IGBTs are more expensive, they are more suitable in terms of reliability, safety, and performance. The control circuit is used to control motor speed, direction, current (or torque), and to protect against overcurrent, overvoltage, and overheating. These parameters are easily converted to analog signals, making control simpler, but from a development perspective, motor parameters should be converted to digital quantities and controlled via digital control circuits. Currently, control circuits are composed of dedicated ICs, microprocessors, and digital signal processors (DSPs). For applications with lower control requirements, dedicated ICs are a simple and practical solution. Using DSPs for control circuits is the future direction; DSPs will be discussed further in the section on AC synchronous servo motors. Brushless DC motors are a rapidly developing new type of motor in the micropower range. Since various application fields require unique brushless DC motors, there are many types. Broadly speaking, these include coreless flat structures for spindle drives in computer external storage and VCD, DVD, CD; outer rotor structures for small ventilators; multi-pole magnetic field and internal structures for home appliances; and multi-pole, outer rotor structures for electric bicycles. In the aforementioned brushless DC motors, the motor body and circuit are integrated, making them very convenient to use, and their production volume is very large. To meet the market demand for high volume and low cost, brushless DC motor production must achieve economies of scale. Therefore, the brushless DC motor industry is characterized by high investment and high output. At the same time, we should consider that the market is constantly developing; for example, motors for household air conditioners are shifting from 3A to 3D, creating a large demand for small and medium-power brushless DC motors. Research and development of small and medium-power brushless DC motors has become an urgent task.

wittenstein motor service life

Motor life is related to various factors such as functional failures caused by insulation degradation, wear of sliding parts, and bearing degradation. In most cases, it depends on the bearing condition. Bearing life includes mechanical life and lubricant life. Bearing life: 1, lubricant life due to thermal degradation; 2, mechanical life due to operational fatigue. In most cases, heat has a greater impact on lubricant life than the load weight on the bearing has on mechanical life. Therefore, when estimating motor life based on lubricant life, temperature is the most significant factor affecting lubricant life, significantly impacting lifespan.

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