MIDDEX-ELECTRONIC motor Germany MIDDEX-ELECTRONIC model MIDDEX-ELECTRONIC price

The MIDDEX-ELECTRONIC motor has a set of adjustable eccentric weights installed at each end of the rotor shaft, utilizing the centrifugal force generated by the high-speed rotation of the shaft and eccentric weights to obtain excitation force. Vibration motors have a wide vibration frequency range; only when the excitation force and power are properly matched can mechanical noise be reduced. Vibration motors have six classifications, such as by starting and operating mode, and by operating speed.

MIDDEX-ELECTRONIC motor protection

Motor protection provides comprehensive protection for motors, issuing alarms or taking protective action in the event of overload, phase loss, locked rotor, short circuit, overvoltage, undervoltage, earth leakage, three-phase imbalance, overheating, bearing wear, stator/rotor eccentricity, axial displacement, and radial runout. Devices that provide motor protection are motor protectors, including thermal relays, electronic protectors, and intelligent protectors. Large and critical motors generally use intelligent protection devices.

MIDDEX-ELECTRONIC motor performance

For the motor drive circuit, the following performance indicators are mainly considered: 1, output current and voltage range. It determines the power of the motor that the circuit can drive; 2, efficiency. High efficiency not only means saving power but also reduces the heat generation of the drive circuit. To improve the efficiency of the circuit, one can start by ensuring the switching state of the power devices and preventing common-mode conduction (a problem that may occur in H bridge circuits, where two power devices conduct simultaneously, causing a power supply short circuit); 3, impact on the control input terminal. The power circuit should have good signal isolation for its input terminal to prevent high voltage and large current from entering the main control circuit, which can be achieved using high input impedance or optocouplers; 4, impact on the power supply. Common-mode conduction can cause instantaneous drops in power supply voltage, resulting in high-frequency power pollution, and large currents may cause ground potential fluctuations; 5, reliability. The motor drive circuit should be as safe as possible regardless of the control signal applied or the passive load. The input signal line is introduced through Port, Port1 pin is the motor direction signal input terminal, Port2 pin is the PWM signal input terminal, and Port3 pin is the ground. Note that Port3 pin is connected to ground with a 2kΩ resistor. When the drive board and the microcontroller are powered separately, this resistor can provide a path for signal current return. When the drive board and the microcontroller share a power supply, this resistor can prevent large currents from flowing along the connection into the ground wire of the microcontroller motherboard, causing interference. In other words, it isolates the ground wire of the drive board from the ground wire of the microcontroller, achieving "single-point grounding". Capacitor C1 prevents sudden voltage drops caused by the sudden start of the motor. NAND gate U1A modulates the PWM signal with the motor direction signal, converting it into a square wave signal with an amplitude close to the power supply voltage.

MIDDEX-ELECTRONIC motor applications

An Asynchronous Motor is an AC motor whose speed under load is not in a constant ratio to the frequency of the connected power grid. It also changes with the magnitude of the load. The greater the load torque, the lower the rotor speed. Asynchronous motors include induction motors, doubly-fed asynchronous motors, and AC commutator motors. Induction motors are the most widely used; without causing misunderstanding or confusion, induction motors can generally be referred to as asynchronous motors. The stator winding of a standard asynchronous motor is connected to the AC grid, and the rotor winding does not need to be connected to another power source. Therefore, it has advantages such as simple structure, convenient manufacturing, use, and maintenance, reliable operation, smaller mass, and lower cost. Asynchronous motors have higher operating efficiency and better working characteristics, running at near-constant speed from no-load to full-load, meeting the transmission requirements of most industrial and agricultural production machinery. Asynchronous motors are also easy to derive into various protective types to adapt to different environmental conditions. During operation, asynchronous motors must absorb reactive excitation power from the grid, worsening the power factor of the grid. Therefore, synchronous motors are often used for driving high-power, low-speed mechanical equipment such as ball mills and compressors. Due to the slip relationship between the speed of asynchronous motors and their rotating magnetic field speed, their speed regulation performance is poor (except for AC commutator motors). For transportation machinery, rolling mills, large machine tools, dyeing and papermaking machinery, etc., which require a wide and smooth speed regulation range, DC motors are more economical and convenient. However, with the development of high-power electronic devices and AC speed control systems, the speed regulation performance and economy of asynchronous motors suitable for wide speed regulation are now comparable to those of DC motors. Asynchronous motors are mainly used as motors, with a power range from a few watts to tens of thousands of kilowatts. They are the most widely used motors in various sectors of the national economy and in people's daily lives, providing power for various mechanical equipment and household appliances. For example, machine tools, small and medium-sized steel rolling equipment, fans, water pumps, light industry machinery, metallurgical and mining machinery, etc., mostly use three-phase asynchronous motors (Asynchronous Motor) for drive; single-phase asynchronous motors are widely used in household appliances such as electric fans, washing machines, refrigerators, and air conditioners. Asynchronous motors can also serve as generators, used in wind power plants and small hydropower stations, etc.

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