VEM Motore motor, German VEM Motore model, VEM Motore price

VEM Motore motors refer to electric motors with a rated voltage above 1000V. Commonly used voltages are 6000V and 10000V. Due to differences in foreign power grids, there are also voltage levels of 3300V and 6600V. High-voltage motors are developed because motor power is proportional to the product of voltage and current. Therefore, when the power of low-voltage motors increases to a certain extent (such as 300KW/380V), the current is limited by the allowable carrying capacity of the wires, making it difficult to increase further or resulting in excessive costs. High power output needs to be achieved by increasing the voltage. The advantages of high-voltage motors are high power and strong shock resistance; the disadvantages are high inertia, making starting and braking difficult.

VEM Motore motor cooling methods

Motor cooling methods include: 1) Cooling: During energy conversion, a small portion of losses in the motor is always converted into heat, which must be continuously dissipated through the motor housing and the surrounding medium. This process of heat dissipation is called cooling. 2) Cooling medium: A gaseous or liquid medium that transfers heat. 3) Primary cooling medium: A gaseous or liquid medium with a temperature lower than that of a specific motor component, which comes into contact with that component and carries away the heat released by it. 4) Secondary cooling medium: A gaseous or liquid medium with a temperature lower than that of the primary cooling medium, which carries away the heat released by the primary cooling medium through the outer surface of the motor or a cooler. 5) Final cooling medium: The final medium to which heat is transferred. 6) Ambient cooling medium: The gaseous or liquid medium in the environment surrounding the motor. 7) Remote medium: A medium located far from the motor, which absorbs heat from the motor and discharges the cooling medium to a remote location through inlet and outlet pipes or channels. 8) Cooler: A device that transfers heat from one cooling medium to another while keeping the two cooling media separated.

VEM Motore motor installation

Motor installation: 1. Preparation before installation: Before unpacking the motor, check whether the packaging is intact and undamaged, and whether there is any sign of moisture. After removing the cover, carefully clean the dust and anti-rust layer on the motor. Carefully inspect for any deformation or damage during transportation, check whether fasteners are loose or missing, verify whether the rotor rotates flexibly, and ensure that the nameplate data meets requirements. Use a 500VMQ meter to measure the insulation resistance; the insulation resistance should not be less than 1MQ, otherwise the windings should be dried, but the drying temperature must not exceed 120℃. 2. Motor installation site and foundation: The altitude of the motor installation site should not exceed 1000m; the installation site for general-purpose motors should be dry and clean, with good ventilation around the motor. Leave sufficient space from other equipment for inspection, monitoring, and cleaning. The ambient temperature should be below 40℃, and strong radiation should be prevented. The installation foundation must be firm and solid with sufficient rigidity, and the mounting surface should be flat to ensure balanced operation of the motor. 3. Motor wiring: The motor should be properly grounded. Grounding devices are located at the bottom right of the terminal box and on the frame housing. If necessary, the motor can also be grounded using the tightening bolts of the feet or flange to ensure safe operation. 4. Connection between motor and mechanical load: The motor can be connected to the load machinery using couplings, spur gears, or belts. For double-shaft extension motors, only coupling transmission is allowed on the fan end. When using coupling connection, the centerline of the motor shaft must align with the centerline of the load machinery shaft to avoid strong vibration, coupling noise, and abnormal sounds during operation.

VEM Motore motor performance

For motor drive circuits, the following performance indicators are mainly considered: 1, output current and voltage range. This determines the power of the motor that the circuit can drive; 2, efficiency. High efficiency not only means saving power but also reduces heating of the drive circuit. To improve circuit efficiency, start by ensuring the switching state of power devices and preventing shoot-through (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 from its input terminal to prevent high voltage and large current from entering the main control circuit. This can be achieved using high input impedance or optocouplers for isolation; 4, impact on the power supply. Shoot-through 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 designed to remain safe regardless of the control signals applied or the passive loads connected. Input signal lines are introduced through Port; pin Port1 is the motor direction signal input terminal; pin Port2 is the PWM signal input terminal; pin Port3 is the ground line. Note that pin Port3 is connected to ground via a 2kΩ resistor. When the driver board and microcontroller are powered separately, this resistor provides a return path for signal current. When the driver board and microcontroller share the same power supply, this resistor prevents large currents from flowing along the connection into the microcontroller motherboard's ground line, causing interference. In other words, it isolates the driver board's ground from the microcontroller's ground, achieving 'single-point grounding'. Capacitor C1 prevents sudden voltage drops caused by abrupt motor startup. 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.

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