Vogel motor Germany Vogel model Vogel price

Vogel motors are named for their armature winding and field winding connected in series. Single-phase series-wound motors are AC/DC universal motors; they can operate on either AC or DC power supplies. Single-phase series-wound motors are widely used. Their advantages include high speed, high starting torque, compact size, light weight, resistance to stalling, and a wide applicable voltage range. Speed control via voltage adjustment is simple and easy to implement.

Vogel motor advantages

Motor advantages: 1, low losses, low temperature rise. Since the magnetic field of a permanent magnet synchronous motor is generated by permanent magnets, excitation losses (i.e., copper losses) caused by excitation current are avoided. With no current in the rotor during operation, motor temperature rise is significantly reduced; under the same load conditions, temperature rise is more than 20K lower. 2, high power factor. Permanent magnet synchronous motors have a high power factor, independent of the number of motor poles. At full load, the power factor approaches 1, resulting in lower motor current compared to asynchronous motors. Consequently, stator copper losses are lower and efficiency is higher. In contrast, the power factor of asynchronous motors decreases as the number of poles increases. Furthermore, due to the high power factor of permanent magnet synchronous motors, the required capacity of the associated power supply (transformer) can theoretically be reduced, allowing for downsizing of associated switchgear and cables. 3, high efficiency. Compared to asynchronous motors, permanent magnet synchronous motors exhibit significantly higher efficiency at light loads and have a wide high-efficiency operating range. Efficiency exceeds 90% in the 25% to 120% range. The rated efficiency of permanent magnet synchronous motors can meet the Class 1 energy efficiency requirements of current national standards, representing their greatest advantage in energy savings compared to asynchronous motors. In actual operation, motors rarely run at full power when driving loads. This is because designers typically determine motor power based on extreme load conditions, which occur infrequently. Additionally, a power margin is included in the design to prevent motor burnout under abnormal conditions. On the other hand, manufacturers often add further power margins to ensure reliability. As a result, most motors in actual operation work below 70% of their rated power, especially when driving fans or pumps, where motors typically operate in the light-load region. Asynchronous motors have very low efficiency at light loads, whereas permanent magnet synchronous motors maintain high efficiency in this region. 4, other advantages. Permanent magnet synchronous motors also offer high starting torque, short starting time, and high overload capability. The installed motor capacity can be reduced based on actual shaft power, saving energy and reducing fixed asset investment. Control is convenient, with constant speed that does not vary with load or voltage fluctuations, depending only on frequency, ensuring smooth and reliable operation. Due to strict speed synchronization and good dynamic response, they are suitable for variable frequency control. The installation dimensions of permanent magnet synchronous motors comply with IEC standards, allowing direct replacement of three-phase asynchronous motors. Protection ratings can achieve IP54 and IP55. Some manufacturers also produce explosion-proof permanent magnet synchronous motors.

Vogel motor mechanical characteristics

Motor electromagnetic torque. The electromagnetic torque of a three-phase asynchronous motor is generated by the interaction between the flux per pole φm of the rotating magnetic field and the rotor current I2. Since the rotor circuit is inductive, the rotor current I2 lags behind the rotor electromotive force E2. The relationship between torque T, flux φm, and rotor current I2 is T = K TΦI 2 c o s Ψ 2 (1). In equation (1): KT is a constant related to the motor structure, cosΨ 2 is the power factor of the rotor circuit, and the unit of torque T is Newton-meter (N·m). As seen from the above equation, torque T is proportional not only to F but also to I 2 cosy 2. From the circuit analysis of three-phase asynchronous motors, substituting equations (2), (3), and (4) into equation (1) yields another expression for torque. Equation (5) shows that torque T is also proportional to the square of the phase voltage U1 of the stator winding. Therefore, changes in supply voltage significantly affect torque. Additionally, torque T is influenced by rotor resistance R2. Mechanical characteristic curve. The curve representing the relationship between electromagnetic torque and slip ratio is the n=f(T) curve. Although the slip ratio s of an asynchronous motor reflects the speed n, it is not intuitive and is inconvenient for application. Therefore, mechanical characteristics are typically used to analyze related drive problems. Under constant supply voltage, the relationship between motor speed and electromagnetic torque is called the motor's mechanical characteristic. For the asynchronous motor n = f(T) curve, the T-s curve is derived through coordinate axis transformation. When s = 0, n=1; when s=1, n=0. By taking speed n as the vertical axis and torque T as the horizontal axis, and rotating the T-s curve clockwise by 90°, the mechanical characteristic curve n = f(T) is obtained. The purpose of studying mechanical characteristics is to analyze motor performance. First, three torques are discussed on the mechanical characteristic curve. Rated torque TN. When the motor rotates at constant speed, its output torque must balance the resisting torque, which is primarily the mechanical load torque T2. It also includes no-load loss torque (primarily mechanical loss torque) T0. Since T0 is very small and often negligible: T = T2+ T0 ≈ T2. Thus, the motor's electromagnetic torque T is approximately equal to the output mechanical torque T2 on the motor shaft. Where: P2 is the mechanical power output on the motor shaft, in Watts (W); the unit of torque is Newton-meter (N.m); the unit of speed is revolutions per minute (r/rnin). If power is expressed in kilowatts, commonly used in engineering: If the mechanical power P2 output on the motor shaft is the rated power P2N, then the output mechanical torque T2 of the motor is the rated torque TN. Maximum torque Tmax. It can be seen that maximum torque Tmax is proportional to U12 and independent of rotor resistance R2; sm is related to R2. The larger R2 is, the larger sm becomes. The ratio of the motor's maximum torque Tmax to its rated torque TN is called the overload coefficient, denoted by λ. That is, λ=Tmax/TN represents the motor's short-term overload capability. Generally, λ for three-phase asynchronous motors is between 1.8 and 2.2, while for special motors used in metallurgy and lifting, λ is between 2.2 and 3. It should be noted that the motor at TN1. The ratio of the motor's starting torque Tst to its rated torque TN, Kst =Tst/TN, indicates the motor's starting capability. Generally, the Kst value for asynchronous motors is between 1. 4 and 2. 2. Motor operation analysis. When the load torque T2 carried by the motor is less than the starting torque Tst, the motor can start with the load. From point c to point b, the motor torque increases as speed rises, causing the motor speed to increase rapidly. At point b, the torque reaches its maximum value Tmax. After passing point b, the motor torque decreases as speed rises. However, as long as the electromagnetic torque T is greater than the load torque T2, the motor speed continues to rise until T = T2, at which point the motor speed stabilizes. Therefore, the stable operating point of the motor lies at a point in the b, a interval of the n = f（T）curve. Hence, the ab region is called the stable operating region. The bc region is the unstable operating region. If the load suddenly increases, or the supply voltage suddenly drops such that T2>Tmax, the motor speed drops rapidly, entering the bc segment. The motor's electromagnetic torque decreases as speed drops, causing the motor to stop quickly. This phenomenon is called stalling. After stalling, the current in the motor immediately rises to several times the rated current. Without protective measures to cut off the power supply in time, the motor may be burned out.

Vogel motor applications

Motor applications are very widespread, such as in automobiles, tools, industrial control, automation, and aerospace. In general, brushless DC motors can be divided into three main categories of applications: Continuous load applications: Primarily fields requiring a certain speed but not high speed precision, such as fans, water pumps, and blowers. These applications have lower costs and mostly use open-loop control. Variable load applications: Primarily applications where speed needs to vary within a certain range, with higher demands on motor speed characteristics and dynamic response time. Good examples include spin dryers and compressors in household appliances, and oil pump control, electronic controllers, and engine control in the automotive industry. The system costs for these applications are relatively higher. Positioning applications: Most industrial control and automatic control applications fall into this category. These applications often involve energy transmission, placing special demands on dynamic speed response and torque, as well as higher requirements for controllers. Photoelectric and some synchronous equipment may be used for speed measurement. Process control, mechanical control, and transport control belong to this category. Practical new types of brushless motors are closely linked to developments in electronic technology, microelectronics, digital technology, automatic control technology, and materials science. They are not limited to AC/DC fields but also involve energy conversion for motoring and generating, as well as signal sensing. There are many varieties of new brushless motors in the motor field, but the application of high-performance brushless motors is not yet widespread due to price constraints. The following explores and studies the main types of new brushless motors.

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