Vogel Antriebstechnik motor, German Vogel Antriebstechnik model, Vogel Antriebstechnik price

Vogel Antriebstechnik motors refer to motors with speeds exceeding 10000r/min. Due to their high speed, their volume is much smaller than that of ordinary motors of the same power. Connected directly to the prime mover, they eliminate traditional reduction gears. With low rotational inertia, high-speed motors offer advantages such as high power density, effective material savings, high transmission efficiency, low noise, and fast dynamic response.

Vogel Antriebstechnik motor structure

The motor electronic commutation circuit consists of two main parts: the power conversion circuit and the control circuit. Working in conjunction with position sensors, it controls the energization sequence and timing of each phase winding of the motor stator, performing a function similar to mechanical commutation. During system operation, the power converter accepts control information from the control circuit and distributes power from the system supply to the phase windings on the stator of the brushless DC motor (BLDCM) according to a specific logic, enabling the motor to generate continuous torque. The inverter converts DC current into AC current to supply the motor. Unlike general inverters, its output frequency is not independently adjustable but is controlled by the rotor position signal, making it a "self-controlled inverter." A significant advantage of permanent magnet brushless motors (BLDCM) is that, due to the use of a self-controlled inverter, the frequency of the motor input current remains synchronized with the motor speed, preventing oscillation and loss of synchronism between the motor and the inverter. For electric vehicle motors, the energization sequence and timing of the windings primarily depend on signals from position sensors. However, these signals generally cannot directly drive the power switching elements of the power converter; they usually require logical processing and isolation via the control circuit before driving the switching elements. The driver circuit processes the rotor position signals detected by the position sensor and outputs them according to a specific logic code to trigger the power switching transistors.

Vogel Antriebstechnik motor speed control

Motor speed control using a current-source PWM converter for wound-rotor induction motors: The rotor electrical energy of the induction motor is converted from AC to DC by an uncontrolled rectifier composed of a diode bridge. The current-source PWM converter then converts this DC energy into AC energy with a frequency equal to the grid frequency, adjustable current amplitude, and adjustable phase. The converted energy is fed back to the grid for reuse via an autotransformer. This speed control scheme has the following characteristics while achieving speed regulation: (1) The transformer input/output requires only a fixed transformation ratio as needed, and electrical isolation between input and output is not required. Therefore, this scheme uses an autotransformer, significantly reducing transformer costs. (2) The AC side output current of the current-source PWM converter is a pulse current containing several harmonics. To ensure normal power system operation and meet international harmonic standards for energy fed back to the grid, appropriate filtering measures at the connection point between the PWM converter and the grid are essential. (3) After filtering, the AC side output current of the current-source PWM converter becomes sinusoidal with a controllable phase angle. Thus, an appropriate control scheme can address harmonic and power factor issues in the speed control system while achieving motor speed regulation. This offers clear advantages over thyristor cascade speed control. ① AC voltage regulation speed control; ② Rotor series resistance AC speed control; ③ AC cascade speed control. In a wound-rotor induction motor, the primary winding on the stator is connected to the power supply, and the rotor has multi-phase windings connected to slip rings. The three-phase symmetrical windings on the rotor can be connected in a Y configuration or a delta configuration. A characteristic of this rotor is that external resistors can be connected to the rotor windings to improve starting performance or adjust speed.

Vogel Antriebstechnik motor development trends

Permanent magnet synchronous motors are gradually being widely used in industrial production and daily life due to their high efficiency, high specific power, simple structure, and significant energy-saving effects. Especially in recent years, with the successful development of high-temperature-resistant, high-magnetic-performance neodymium-iron-boron permanent magnets and further development and improvement of power electronic components, research and development of rare-earth permanent magnet synchronous motors have entered a new phase domestically and internationally. Both theoretical research and application fields are experiencing qualitative leaps, currently developing towards ultra-high speed, high torque, high power, miniaturization, and high functionality. Permanent magnet synchronous motors do not require excitation windings, have a relatively simple structure, have no heat source in the magnetic field part, and do not require cooling devices. The high coercivity of the materials allows for larger air gap lengths, making significant increases in speed possible. Due to the high maximum energy product of neodymium-iron-boron permanent magnets, especially the ability to manufacture ultra-thin permanent magnets, it has become possible to produce ultra-micro and low-inertia motors that were previously difficult to make. Ultra-small motors with diameters of less than a few millimeters have been developed as drive sources for medical micro-machines, robotic arms for eye surgery, or robots for pipeline inspection. The world's smallest permanent magnet motor, with an outer diameter of 0.8mm and a length of 1.2mm, has been produced.

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