TECMOTION motor Germany TECMOTION model TECMOTION price

TECMOTION motor refers to the engine that controls the operation of mechanical components in a servo system; it is an auxiliary motor indirect speed change device. Servo motors can control speed with very accurate position precision, converting voltage signals into torque and rotational speed to drive controlled objects. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In automatic control systems, it serves as an actuator, featuring small electromechanical time constants and high linearity, converting received electrical signals into angular displacement or angular velocity output on the motor shaft. It is divided into two major categories: DC and AC servo motors. Its main characteristics are that there is no self-rotation phenomenon when the signal voltage is zero, and the rotational speed decreases uniformly as the torque increases.

TECMOTION motor working principle

The working principle of the motor is based on the DC series-wound motor. The principle is shown in Figure 1. The field winding and armature winding are connected in series to a DC power supply. According to the direction of the main magnetic flux Φ and the armature current Ia, the direction of rotor rotation can be determined by the left-hand rule; in a, it rotates counterclockwise. If the polarity of the power supply is reversed, as shown in Figure 1b, since it is a series-wound motor, both the main magnetic flux Φ and the armature current Ia change direction simultaneously. According to the left-hand rule, the rotor direction remains unchanged, still rotating counterclockwise. Therefore, when a single-phase AC voltage is applied to the series-wound motor, as shown in Figure 1c, although the power supply polarity changes periodically, the rotor maintains a constant direction of rotation. Thus, series-wound motors can be used with both AC and DC power sources. Single-phase series-wound motors belong to single-phase AC asynchronous motors and are dual-use for AC and DC, so they are also called AC/DC dual-use series-wound motors. Due to their high speed, compact size, high starting torque, and adjustable speed, they can be used on both DC and single-phase AC power supplies, resulting in wide application in power tools. The motor mainly consists of three parts: stator, rotor, and bracket. The stator consists of salient pole iron core and field winding. The rotor consists of non-salient pole iron core, armature winding, commutator, and shaft. The field winding and armature winding form a series circuit through brushes and commutator.

TECMOTION motor performance

Comparison of motor performance, comparison of the performance of servo motors and stepper motors. As an open-loop control system, the stepper motor has an essential connection with modern digital control technology. In domestic digital control systems, the application of stepper motors is very widespread. 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 use stepper motors or all-digital AC servo motors as actuator motors. Although the two 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 is presented below. 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 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 is related to the load condition and driver performance; it is generally considered that the vibration frequency is half the no-load slew rate of the motor. This low-frequency vibration phenomenon, determined by the working principle of the stepper motor, is very unfavorable for the normal operation of machinery. When a stepper motor operates at low speed, damping techniques should generally be used to overcome low-frequency vibration, such as adding a damper to the motor or using microstepping technology in the driver. AC servo motors operate very smoothly, with no vibration even at low speeds. The AC servo system has a resonance suppression function, which can cover insufficient mechanical rigidity, and the system internally has a frequency analysis function (FFT) to detect mechanical resonance points, facilitating system adjustment.

TECMOTION motor structure

The motor consists of two basic parts: a stationary stator and a rotating rotor. The rotor is installed inside the stator cavity and supported on two end covers by bearings. To ensure the rotor can rotate freely within the stator, there must be a gap between the stator and rotor, called the air gap. The air gap of the motor is a very important parameter; its size and symmetry greatly affect motor performance. Figure 2 shows the components of a three-phase squirrel-cage asynchronous motor. The stator consists of three-phase stator windings, stator iron core, and frame. The three-phase stator windings are the circuit part of the asynchronous motor, playing a crucial role in its operation as the key component for converting electrical energy into mechanical energy. The structure of the three-phase stator windings is symmetrical, generally having six output terminals U1, U2, V1, V2, W1, W2, located in the junction box outside the frame, connected in star (Y) or delta (△) configuration as needed. The stator iron core is part of the magnetic circuit of the asynchronous motor. Since the main magnetic field rotates relative to the stator at synchronous speed, to reduce losses caused in the iron core, the core is laminated from high-permeability silicon steel sheets 0.5mm thick. Both sides of the silicon steel sheets are coated with insulating varnish to reduce eddy current losses in the core. The frame, also known as the housing, mainly supports the stator iron core and withstands the reaction forces generated during full motor load operation. Heat generated by internal losses during operation is also dissipated outward through the frame. Frames for medium and small motors are generally made of cast iron. For large motors, where casting is inconvenient due to size, welded steel plates are commonly used.

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