Wuerges Vibrationstechnik motor Germany Wuerges Vibrationstechnik model Wuerges Vibrationstechnik price

Wuerges Vibrationstechnik motors are a type of electric motor powered by simultaneously connecting to 380V three-phase AC current (phase difference 120 degrees). Because the rotor of a three-phase asynchronous motor rotates in the same direction but at a different speed than the stator's rotating magnetic field, there is slip, hence the name three-phase asynchronous motor. The rotor speed of a three-phase asynchronous motor is lower than the speed of the rotating magnetic field. The rotor windings generate electromotive force and current due to relative motion with the magnetic field, and interact with the magnetic field to produce electromagnetic torque, achieving energy conversion.

Wuerges Vibrationstechnik motor classification

Motor classification. (1) Large motors refer to motors with a frame center height greater than 630mm. (2) Medium-sized motors refer to motors with a frame center height between 355 and 630mm. (3) Small motors refer to motors with a frame center height in the range of 80-315mm. Two Classification by motor speed: (1) Constant-speed motors include standard squirrel-cage, special squirrel-cage (deep-bar, double-cage, high starting torque), and wound-rotor types. (2) Speed-regulating motors are motors equipped with commutators. (3) Variable-speed motors include pole-changing motors, single-winding multi-speed motors, special squirrel-cage motors, and slip motors. Three Classification by mechanical characteristics: (1) Standard squirrel-cage asynchronous motors are suitable for applications with small capacity and low slip variation under constant-speed operation, such as blowers, centrifugal pumps, and lathes, where low starting torque and constant load are required. (2) Deep-bar squirrel-cage motors are suitable for medium-capacity applications requiring a starting torque slightly higher than that of standard squirrel-cage asynchronous motors. (3) Double-cage asynchronous motors are suitable for medium and large squirrel-cage rotor motors. They offer higher starting torque but slightly lower maximum torque. They are suitable for constant-speed loads requiring high starting torque, such as conveyor belts, compressors, crushers, mixers, and reciprocating pumps. (4) Special double-cage asynchronous motors are made of high-impedance conductor materials. They feature high starting torque, low maximum torque, and higher slip, enabling speed regulation. They are suitable for equipment such as punch presses and cutting machines. (5) Wound-rotor asynchronous motors are suitable for applications requiring high starting torque and low starting current, such as conveyor belts, compressors, and rolling mills. Four Classification by motor protection type: (1) Open-type motors have no specific protection for rotating and live parts, other than necessary supporting structures. (2) Protected-type motors have necessary mechanical protection for rotating and live parts, without significantly obstructing ventilation. Depending on the ventilation opening protection structure, there are three types: mesh-covered, drip-proof, and splash-proof. Drip-proof differs from splash-proof; drip-proof prevents vertically falling solids or liquids from entering the motor interior, while splash-proof prevents liquids or solids from entering the motor interior from any direction within an angle of 1000 degrees from the vertical. (3) Enclosed-type motors have a housing structure that prevents free exchange of air between the inside and outside, but does not require complete sealing. (4) Waterproof-type motors have a housing structure that prevents water under certain pressure from entering the motor interior. (5) Watertight-type motors have a housing structure that prevents water from entering the motor interior when the motor is submerged in water. (6) Submersible motors can operate continuously in water under specified water pressure. (7) Explosion-proof motors have a housing structure that prevents internal gas explosions from propagating to the exterior and igniting flammable gases outside the motor. Five Classification by motor operating environment: general purpose, tropical humid, dry heat, marine, chemical, high-altitude, and outdoor types.

Wuerges Vibrationstechnik motor applications

Motors are mainly used in digital control systems, offering high precision and reliable operation. Closed-loop control can also be achieved by employing position detection and speed feedback. Stepper motors have been widely applied in digital control systems, such as in digital-to-analog conversion devices, CNC machine tools, computer peripherals, automatic recorders, and clocks. They are also used in industrial automation production lines and printing equipment. A stepper motor is an open-loop control element that converts electrical pulse signals into angular or linear displacement. Under non-overload conditions, the motor's speed and stopping position depend solely on the frequency and number of pulse signals, unaffected by load changes. That is, each pulse signal applied to the motor causes it to rotate by one step angle. The existence of this linear relationship, combined with the characteristic that stepper motors have only periodic errors and no cumulative errors, makes control in areas such as speed and position very simple. Although stepper motors are widely used, they cannot be used under conventional conditions like standard DC or AC motors. They require a control system composed of dual-ring pulse signals, power drive circuits, and other components. Therefore, proper use of stepper motors is not easy, as it involves extensive professional knowledge in mechanics, motors, electronics, and computers. Nowadays, there are indeed many manufacturers producing stepper motors, but very few have specialized technical personnel capable of independent development and research. Most manufacturers have only ten to twenty employees and lack even basic equipment, remaining at a stage of blind imitation. This causes many difficulties for users in product selection and usage. In view of the above situation, we have decided to take the widely used variable-reluctance stepper motor as an example to describe its basic working principle, hoping to assist users in selection, usage, and overall equipment improvement.

Wuerges Vibrationstechnik motor working principle

Motor principle: When single-phase sinusoidal current passes through the stator winding, the motor generates an alternating magnetic field. The strength and direction of this field change sinusoidally over time but remain fixed in spatial orientation, so it is also called an alternating pulsating magnetic field. This alternating pulsating magnetic field can be decomposed into two rotating magnetic fields with the same speed but opposite directions of rotation. When the rotor is stationary, these two rotating magnetic fields produce two equal and opposite torques in the rotor, resulting in zero net torque, so the motor cannot rotate. When an external force causes the motor to rotate in a certain direction (e.g., clockwise), the relative motion of cutting magnetic flux lines between the rotor and the clockwise rotating magnetic field decreases, while the relative motion between the rotor and the counter-clockwise rotating magnetic field increases. This breaks the balance, and the total electromagnetic torque produced by the rotor is no longer zero, causing the rotor to rotate in the direction of the push. To enable a single-phase motor to start automatically, a starting winding can be added to the stator. The starting winding is spatially displaced by 90 degrees from the main winding. A suitable capacitor is connected in series with the starting winding so that its current is approximately 90 degrees out of phase with the main winding current, known as the phase-splitting principle. Thus, two currents with a time phase difference of 90 degrees flowing into two windings with a spatial difference of 90 degrees will generate a (two-phase) rotating magnetic field in space. Under the action of this rotating magnetic field, the rotor can start automatically. After starting, when the speed reaches a certain level, a centrifugal switch or other automatic control device mounted on the rotor disconnects the starting winding, leaving only the main winding operational during normal operation. Therefore, the starting winding can be designed for short-time operation. However, in many cases, the starting winding is not disconnected; such motors are called single-phase motors. To change the rotation direction of this type of motor, simply swap the terminals of the auxiliary winding. Another method to generate a rotating magnetic field in single-phase motors is called the shaded-pole method, also known as single-phase shaded-pole motors. The stator of this motor is salient-pole, available in two-pole and four-pole configurations. Each pole has small slots cut into 1/3 to 1/4 of the full pole face, dividing the pole into two parts. A short-circuited copper ring is fitted over the smaller part, appearing to shade that portion of the pole, hence the name shaded-pole motor. The single-phase winding is mounted over the entire pole, with the coils of each pole connected in series. During connection, the polarity must be arranged sequentially as N, S, N, S. When the stator winding is energized, main magnetic flux is generated in the poles. According to Lenz's law, the main flux passing through the short-circuited copper ring induces a current in the ring that lags in phase by 90 degrees. The flux generated by this current also lags behind the main flux in phase, acting similarly to the starting winding of a capacitor motor, thereby generating a rotating magnetic field that causes the motor to rotate.

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