EMZ motor, German EMZ motor model, EMZ motor price

EMZ motor The motor consists of the main motor body and the driver, and is a typical mechatronic product. A brushless motor refers to a motor without brushes and a commutator (or slip rings), also known as a commutator-less motor. As early as the nineteenth century, when motors were first invented, the practical motors produced were of the brushless type, namely AC squirrel-cage asynchronous motors, which were widely used. However, asynchronous motors have many insurmountable defects, resulting in slow development of motor technology. Transistors were born in the mid-twentieth century, so DC brushless motors using transistor commutation circuits to replace brushes and commutators emerged. This new type of brushless motor is called an electronically commutated DC motor, which overcomes the defects of the first generation of brushless motors.

EMZ motor performance

Motor performance comparison: comparison of servo motor and stepper motor performance. As an open-loop control system, the stepper motor is intrinsically linked to modern digital control technology. In domestic digital control systems, stepper motors are widely used. With the emergence of all-digital AC servo systems, AC servo motors are increasingly applied in digital control systems. To adapt to the trend of digital control, motion control systems mostly use stepper motors or all-digital AC servo motors as actuator motors. Although both are similar in control method (pulse train and direction signals), there are significant differences in performance and application scenarios. The following compares their performance. One, different control accuracy: the step angle of a two-phase hybrid stepper motor is generally 1.8° and 0.9°; the step angle of a five-phase hybrid stepper motor is generally 0.72 ° and 0.36°. Some high-performance stepper motors achieve smaller step angles through microstepping. Two, different low-frequency characteristics: stepper motors are prone to low-frequency vibration at low speeds. The vibration frequency depends on the load and driver performance; it is generally considered to be half the no-load slewing frequency of the motor. This low-frequency vibration, determined by the working principle of the stepper motor, is highly detrimental to normal machine operation. When operating at low speeds, damping techniques should generally be employed to overcome low-frequency vibration, such as adding a damper to the motor or using microstepping in the driver. AC servo motors operate very smoothly, with no vibration even at low speeds. AC servo systems feature resonance suppression functions that can compensate for insufficient mechanical rigidity, and include internal frequency analysis capabilities (FFT) to detect mechanical resonance points, facilitating system adjustment.

EMZ motor classification

Broad classification of motors: there is a wide variety of motor types. AC motors can be divided into low-speed and high-speed categories. Low-speed types are called low-speed motors, AC low-speed motors; high-speed types are called high-speed motors, high-speed electric motors, AC high-speed motors. High-speed motors are also referred to as motorized spindles or high-speed motorized spindles. The motorized spindle is a new technology that has emerged in recent years in the field of CNC machine tools, integrating the machine tool spindle and the spindle motor into one unit. Together with linear motor technology and high-speed tooling technology, it will usher in a new era of high-speed machining. A motorized spindle is an assembly comprising the spindle itself and its accessories: the motorized spindle, high-frequency variable frequency drive, oil-mist lubricator, cooling unit, built-in encoder, and tool changing device. Motorized spindles typically use composite ceramic bearings, which are wear-resistant and heat-resistant, with a lifespan several times that of traditional bearings; sometimes magnetic levitation bearings or hydrostatic bearings are used, where the inner and outer rings do not contact, theoretically offering infinite life. The motorized spindle is the product of integrating the motor and the spindle; the motor rotor serves as the rotating part of the spindle, so theoretically, the motorized spindle can be regarded as a high-speed motor. The key technology is dynamic balancing at high speeds. Lubrication of motorized spindles generally uses timed, metered oil-air lubrication; grease lubrication can also be used, but at the cost of reduced speed. 'Timed' means injecting oil at fixed time intervals. 'Metered' means precisely controlling the amount of lubricating oil each time via a device called a metering valve. Oil-air lubrication refers to lubricating oil being blown into the ceramic bearing carried by compressed air. Oil volume control is critical: too little fails to lubricate; too much causes heating due to oil resistance during high-speed bearing rotation. Cooling unit: to dissipate heat from the high-speed running motorized spindle as quickly as possible, circulating coolant is usually passed through the outer wall of the spindle; the cooling unit maintains the coolant temperature. To enable automatic tool changing and rigid tapping, the motorized spindle has a built-in pulse encoder for accurate phase angle control and coordination with feed. For application in machining centers, the motorized spindle is equipped with an automatic tool changing device, including disc springs, tool pulling cylinders, etc. The well-known BT and ISO tool holders have been proven unsuitable for high-speed machining. In such cases, high-speed tool holders such as HSK and SKI have appeared. To achieve rotational speeds of tens of thousands or even over one hundred thousand RPM for the motorized spindle, a high-frequency variable frequency drive must be used to drive the built-in high-speed motor; the output frequency of the inverter must reach thousands of Hertz.

EMZ motor development trends

Motor development trends: Since the introduction of switched reluctance motor drive systems in the 20s of the 80th century, traditional motor design theories and sinusoidal voltage source power supply methods have been broken. With the development of reluctance motors, permanent magnet motors, power electronics, and computer technology, AC motor drive system design has entered a new golden age. New motor topologies and control methods continue to emerge, driving the rapid development of new-generation mechatronic motor drive systems. The main features of the SRD switched reluctance motor drive system are a compact and robust motor structure suitable for high-speed operation, simple and low-cost drive circuits, reliable performance, high efficiency over a wide speed range, and easy implementation of four-quadrant control. These characteristics make the SRD switched reluctance motor drive system well-suited for various operating conditions of electric vehicles, making it a highly promising candidate for electric vehicles. The biggest drawback of SRD is large torque ripple and noise; furthermore, compared to permanent magnet motors, it has lower power density and efficiency. Another disadvantage is the need for position sensors, which increases structural complexity and reduces reliability. Therefore, sensorless SRD is also one of the future development trends. Permanent magnet switched reluctance motors, also known as doubly salient permanent magnet motors, can adopt cylindrical radial magnetic field structures, disc-type axial magnetic field structures, or ring-type transverse magnetic field structures. This motor superimposes permanent magnet torque on reluctance torque; the presence of permanent magnet torque helps increase power density and reduce torque ripple, facilitating its application in electric vehicle drive systems. The concept of the rotor pole-segmented hybrid excitation synchronous motor has attracted great attention from the international electrical engineering community and major automotive company R&D centers. The rotor pole-segmented hybrid excitation synchronous motor has magnetic field control capabilities, similar to the low-speed field-weakening control and high-speed field-weakening control of DC motors, meeting the requirements of electric vehicle traction motors for high torque at low speeds and constant power with wide speed regulation. Research on this motor is in the exploratory stage; its mechanisms and design theory require further in-depth study and refinement. As a traction motor for electric vehicles, it has strong potential competitive advantages.

Weidou Intelligent Technology specializes in selling German EMZ motors, EMZ motor actuators, EMZ motor drivers, EMZ motor synchronous motors, EMZ motor servo motors, EMZ motor DC motors, EMZ motor AC motors, EMZ motor stepper motors, EMZ motor synchronous motors, EMZ motor asynchronous motors, EMZ motor single-phase motors, EMZ motor three-phase motors, EMZ motor drive motors, EMZ motor geared motors, EMZ motor electric motors. EMZ motors are original German imports. Customers are welcome to inquire and order.