Servostar motor Germany Servostar model Servostar price

Servostar motor is a type of motor that can be used in flammable and explosive environments, producing no electrical sparks during operation. Explosion-proof motors are mainly used in coal mines, oil and natural gas, petrochemical, and chemical industries. In addition, they are widely used in textiles, metallurgy, urban gas, transportation, grain and oil processing, papermaking, pharmaceuticals, and other sectors. As primary power equipment, explosion-proof motors are typically used to drive pumps, fans, compressors, and other transmission machinery.

Servostar motor working principle

Motor working principle: A servo system (servo mechanism) is an automatic control system that enables output controlled variables such as position, orientation, and state of an object to follow any change in the input target (or setpoint). Servo positioning relies primarily on pulses. Basically, it can be understood that when the servo motor receives 1 pulse, it rotates by the angle corresponding to 1 pulse, thereby achieving displacement. Because the servo motor itself has the function of emitting pulses, each time the servo motor rotates by an angle, it emits a corresponding number of pulses. This forms a response, or closed loop, with the pulses received by the servo motor. In this way, the system knows how many pulses were sent to the servo motor and how many pulses were received back, allowing precise control of the motor's rotation and thus achieving precise positioning, which can reach 0.001mm. DC servo motors are divided into brushed and brushless motors. Brushed motors have low cost, simple structure, high starting torque, wide speed regulation range, and easy control; they require maintenance, but maintenance is inconvenient (changing carbon brushes), they generate electromagnetic interference, and have environmental requirements. Therefore, they can be used in cost-sensitive general industrial and civil applications. Brushless motors are small in size, light in weight, high in output, fast in response, high in speed, low in inertia, smooth in rotation, and stable in torque. Control is complex, intelligence is easily achieved, and their electronic commutation method is flexible, allowing square wave commutation or sine wave commutation. The motors are maintenance-free, highly efficient, operate at low temperatures, have very low electromagnetic radiation, long life, and can be used in various environments. AC servo motors are also brushless motors, divided into synchronous and asynchronous motors; synchronous motors are generally used in motion control. They have a wide power range and can achieve very high power. High inertia, low maximum rotational speed, which decreases rapidly as power increases. Therefore, they are suitable for applications requiring smooth low-speed operation. The rotor inside the servo motor is a permanent magnet. The U/V/W three-phase electricity controlled by the driver forms an electromagnetic field. The rotor rotates under the action of this magnetic field. At the same time, the encoder built into the motor feeds back signals to the driver. The driver compares the feedback value with the target value and adjusts the rotation angle of the rotor. The precision of the servo motor depends on the precision of the encoder (line count). Functional differences between AC servo motors and brushless DC servo motors: AC servo is better because it uses sine wave control, resulting in small torque ripple. DC servo uses trapezoidal waves. However, DC servo is simpler and cheaper.

Servostar motor fault analysis

The engine speed and crankshaft position sensor detects speed signals and provides crankshaft position signals during engine operation, serving as the main basis and foundation for the control system to perform various controls. If the sensor or its wiring fails, the ECU cannot receive speed and crankshaft position signals, making it impossible to correctly control fuel injection and ignition timing. This results in the injectors not operating and the spark plugs not firing. Using a stethoscope and timing light for inspection can confirm whether the injectors and spark plugs are working. When the above faults occur, the self-diagnostic system usually displays fault codes. A comprehensive inspection should be carried out on the speed sensor, 1, 2 camshaft position sensor, and their wiring. First, disconnect the connectors of each sensor and check their resistance. If the resistance value is abnormal, replacement is required; if normal, check whether the wiring and connectors between the ECU and each sensor are normal. If the fuel pump or control circuit fails, it will also cause a lack of fuel pressure in the fuel supply system. Even if the injectors work normally, fuel cannot be injected properly. The inspection method is: use a jumper wire to connect diagnostic plug terminals +B and FP, then turn on the ignition switch (without starting), and check for pressure in the fuel inlet hose. If there is pressure in the hose and a return fuel sound can be heard, it indicates that the fuel pump itself has no problem; otherwise, the fuel pump should be checked. Use a multimeter to measure the resistance between terminals 4 and 5. If it does not match the specification, the fuel pump needs to be replaced. If the fuel pump works normally, its control circuit should be checked, mainly including fuses, EFI main relay, fuel pump relay, resistors, and all wiring and connectors.

Servostar motor classification

The rotor of the motor is made with salient poles. The field coils mounted on the pole cores are connected in series, arranged with alternating opposite polarities, and have two lead wires connected to two slip rings mounted on the shaft. The field coils are excited by a small DC generator or a battery. In most synchronous motors, the DC generator is mounted on the motor shaft to supply excitation current to the rotor pole coils. Since this type of synchronous motor cannot start automatically, a squirrel-cage winding is installed on the rotor for starting purposes. The squirrel-cage winding is placed around the rotor, with a structure similar to that of an asynchronous motor. When three-phase AC power is applied to the stator windings, a rotating magnetic field is generated inside the motor. The squirrel-cage winding cuts the magnetic flux lines, generating induced current, which causes the motor to rotate. After the motor starts rotating, its speed gradually increases to slightly below the speed of the rotating magnetic field. At this point, the rotor field coils are excited by DC current, forming certain magnetic poles on the rotor. These poles attempt to track the rotating magnetic poles on the stator, thereby increasing the rotor speed until it rotates synchronously with the rotating magnetic field.

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