Bretzel motor Germany Bretzel model Bretzel price

Bretzel motor is a rotating motor containing a brush assembly that converts DC electrical energy into mechanical energy (DC motor) or converts mechanical energy into DC electrical energy (DC generator). Distinct from brushless DC motors, the brush assembly is used to introduce or extract DC voltage and DC current. Brushed DC motors are the foundation of all motors; they feature fast starting, timely braking, smooth speed regulation over a wide range, and relatively simple control circuits.

Bretzel motor precautions

Protection against oil and water for motors. A: Servo motors can be used in locations subject to water or oil droplet ingress, but they are not fully waterproof or oil-proof. Therefore, servo motors should not be placed or used in environments submerged in water or contaminated with oil. B: If the servo motor is connected to a gearbox, an oil seal should be used when operating the servo motor to prevent oil from the gearbox from entering the servo motor. C: Do not immerse servo motor cables in oil or water. Two, Servo motor cable → stress relief. A: Ensure that the cable is not subjected to torque or vertical load due to external bending forces or its own weight, especially at the cable outlet or connection point. B: When the servo motor is moving, the cable (the one supplied with the motor) should be securely fixed to a stationary part (relative to the motor), and it should be extended using an additional cable installed in a cable support to minimize bending stress. C: Make the bending radius of the cable as large as possible. Three, Permissible shaft end load for servo motors. A: Ensure that radial and axial loads applied to the servo motor shaft during installation and operation are kept within the specified values for each model. B: Exercise extreme caution when installing a rigid coupling, as excessive bending load may cause damage or wear to the shaft end and bearings. C: It is recommended to use flexible couplings to keep radial load below the permissible value; these are designed specifically for servo motors with high mechanical strength. D: For permissible shaft loads, refer to the "Permissible Shaft Load Table" (user manual). Four, Servo motor installation precautions. A: When installing/removing coupling components on the servo motor shaft end, do not strike the shaft end directly with a hammer. (Striking the shaft end directly with a hammer will damage the encoder on the other end of the servo motor shaft.) B: Strive to align the shaft end to the optimal state (misalignment may cause vibration or bearing damage).

Bretzel motor development history

Motor development history: By changing the positions of the stator and rotor of a permanent magnet DC motor, a permanent magnet brushless DC motor can be obtained. Note that the term "DC" can be misleading, as it does not refer to a DC motor; in fact, it is powered by AC square waves, so it is also called a permanent magnet brushless square wave motor. Its greatest advantage is being brushless, eliminating many problems associated with brushes. Moreover, the interaction between square wave current and square wave magnetic field can generate greater torque. The full name given by Professor Shen Dawei of Foshan Lighting is "Permanent Magnet Brushless Square Wave Torque Motor." Replacing the excitation winding of a traditional synchronous motor with permanent magnet material eliminates the copper losses of traditional brushes, slip rings, and excitation windings. Due to the use of sinusoidal AC and a brushless structure, it is also called a permanent magnet brushless AC motor. Its advantages are high energy density and high efficiency, a wider speed range in the constant power region, and the ability to meet the high-performance requirements of electric vehicles using vector control methods. Asynchronous motors are characterized by simple structure, durability, low cost, reliable operation, low torque ripple, low noise, no need for position sensors, and high speed limits. Vector control speed regulation technology for asynchronous motors is relatively mature, giving asynchronous motor drive systems significant advantages, so they were applied earlier to electric vehicle drive systems and remain the mainstream product for electric vehicle drive systems (especially in the US), but they are gradually being replaced by other new types of brushless permanent magnet traction motor drive systems. The biggest disadvantage is the complex drive circuit and high cost; compared to permanent magnet motors, asynchronous motors have lower efficiency and power density.

Bretzel motor speed regulation

The motor frequency converter is a low-voltage frequency converter. The input side uses a transformer to step down high voltage to low voltage, replacing high-voltage motors with specialized low-voltage motors. Motor voltage levels vary widely, with no unified standard. This approach, using low-voltage frequency converters, has relatively small capacity and generates significant harmonics on the grid side. 12 pulse rectification can be used to reduce harmonics, but it does not meet strict harmonic requirements. When the frequency converter fails, the motor cannot be switched to run on the industrial frequency grid, causing issues in applications where shutdown is not permitted. Additionally, both the motor and cables must be replaced, resulting in a large amount of work. Feeding part of the rotor energy of an asynchronous motor back to the grid to change rotor slip for speed regulation uses thyristor technology and requires wound-rotor asynchronous motors. However, industrial sites now almost exclusively use squirrel-cage asynchronous motors, making motor replacement very troublesome. The speed regulation range of this method is generally around 70%-95%, which is narrow. Thyristor technology easily causes harmonic pollution to the grid; as speed decreases, the grid-side power factor also drops, requiring compensation measures. Its advantage is that the frequency conversion part has smaller capacity and is slightly lower in cost than other high-voltage AC variable frequency speed regulation technologies. A variation of this speed regulation method is the internal feedback speed regulation system, which eliminates the transformer in the inverter part by integrating the feedback winding directly into the stator winding. This approach requires motor replacement, and its performance in other aspects is similar to cascade speed regulation.

Weidou Intelligent Technology professionally sells German Bretzel motors, Bretzel motors, Bretzel drives, Bretzel synchronous motors, Bretzel servo motors, Bretzel DC motors, Bretzel AC motors, Bretzel stepper motors, Bretzel synchronous motors, Bretzel asynchronous motors, Bretzel single-phase motors, Bretzel three-phase motors, Bretzel drive motors, Bretzel geared motors, Bretzel electric motors, Bretzel original German imports. Welcome customers to inquire and order.