EMK Drives motor Germany EMK Drives model EMK Drives price

EMK Drives motors consist of the motor body and the drive, representing a typical mechatronic product. Brushless motors refer to motors without brushes and commutators (or slip rings), also known as commutator-less motors. 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 had many insurmountable drawbacks, resulting in slow development of motor technology. In the mid-twentieth century, transistors were invented, leading to the emergence of DC brushless motors that use transistor commutation circuits to replace brushes and commutators. This new type of brushless motor is called an electronically commutated DC motor, which overcame the drawbacks of the first generation of brushless motors.

EMK Drives motor operating principle

The linear motor evolved from the corresponding rotary electric motor, and its operating principle is similar to that of ordinary rotary electric motors. The magnetic poles of a linear synchronous motor can be excited by DC excitation windings or by permanent magnets, with the permanent magnet type offering higher reliability and efficiency. When symmetrical three-phase sinusoidal AC current is applied to the three-phase stator windings, the combined effect of the resulting traveling wave magnetic field in the air gap and the permanent magnet pole magnetic field generates an electromagnetic thrust on the permanent magnet pole mover. If the primary part remains stationary, the magnetic poles move linearly in the direction of the traveling wave magnetic field under this electromagnetic thrust, and the speed of the magnetic poles is identical to the speed of the traveling wave magnetic field. Compared to linear induction motors, linear synchronous motors provide greater driving force, better control performance, and higher position accuracy. Therefore, linear synchronous motors are given greater importance in drive systems for high-speed ground transportation and linear lifting devices, making various types of linear synchronous motors the primary choice for linear drives.

EMK Drives motor performance

Motor performance comparison: comparison of servo motor and stepper motor performance. As an open-loop control system, the stepper motor has an essential connection with 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 also increasingly applied in digital control systems. To adapt to the development trend of digital control, motion control systems mostly adopt 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 usage performance and application scenarios. A comparison of their usage performance follows. One, different control precision: the step angle of two-phase hybrid stepper motors is generally 1.8° and 0.9°; the step angle of five-phase hybrid stepper motors is generally 0.72 ° and 0.36°. Some high-performance stepper motors achieve even 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 condition and drive performance; it is generally considered to be half of the motor's no-load start-up frequency. This low-frequency vibration phenomenon, determined by the operating principle of stepper motors, is very unfavorable for the normal operation of machinery. When stepper motors operate at low speeds, damping techniques should generally be employed to overcome low-frequency vibration, such as adding dampers to the motor or using microstepping technology in the drive. AC servo motors run very smoothly and do not exhibit vibration even at low speeds. AC servo systems have resonance suppression functionality, which can compensate for insufficient mechanical rigidity, and the system internally features frequency analysis capability (FFT) to detect mechanical resonance points, facilitating system adjustment.

EMK Drives motor basic definition

A motor is what people commonly refer to today as a starter motor. It operates by energizing coils in a magnetic field to generate torque, rotating the starter rotor; the pinion gear on the rotor engages the engine flywheel, thereby turning the crankshaft to start the vehicle. Two component innovations—the new low-cost spark plug with a ceramic core base and the starter—laid the technical foundation for automotive development. The electric starter eliminated the heavy and dangerous hand crank, making driving safer, easier, and more convenient, and it was particularly favored by a broad new consumer base, including women. At the time, Henry Leland, manager of the Cadillac division of General Motors, immediately recognized the potential of this technological achievement and quickly adopted it as standard equipment on the company's 1912 version of Cadillac models, earning these Cadillacs the name "car without a crank." The introduction of the electric starter is still recognized today as the most influential automotive innovation of the twentieth century.

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