Portescap motor, Germany Portescap model, Portescap price

Portescap motor refers to a motor that can operate continuously under standard environmental conditions at 100% rated load within the 10%~100% rated speed range, with temperature rise not exceeding the motor's specified allowable value. When the slip of an asynchronous motor changes slightly, its speed is proportional to the frequency; thus, changing the power supply frequency changes the speed of the asynchronous motor. During variable frequency speed control, it is always desired to keep the main magnetic flux constant. If the main magnetic flux is greater than the flux during normal operation, the magnetic circuit becomes oversaturated, causing an increase in excitation current and a decrease in power factor; if the main magnetic flux is less than the flux during normal operation, the motor torque decreases.

Portescap motor commissioning method

Motor commissioning: 1, initialize parameters. Before wiring, initialize the parameters first. On the control card: select the control mode; clear the PID parameters; set the enable signal to be disabled by default when the control card is powered on; save this state to ensure it is restored upon subsequent power-ups. On the servo motor: set the control mode; set enable to be controlled externally; set the gear ratio for encoder signal output; set the proportional relationship between the control signal and motor speed. Generally, it is recommended that the maximum design speed during servo operation corresponds to a control voltage of 9V. 2, wiring. Power off the control card and connect the signal lines between the control card and the servo. The following lines must be connected: analog output line from the control card, enable signal line, and encoder signal line from the servo. After rechecking that the wiring is correct, power on the motor and control card (as well as the PC). At this point, the motor should remain stationary and can be easily rotated by external force. If this is not the case, check the enable signal settings and wiring. Rotate the motor by external force to check if the control card correctly detects changes in motor position; otherwise, check the encoder signal wiring and settings. 3, test direction. For a closed-loop control system, incorrect feedback signal direction will have disastrous consequences. Enable the servo via the control card. The servo should rotate at a low speed, known as "zero drift." Most control cards have commands or parameters to suppress zero drift. Use these to verify if motor speed and direction can be controlled. If not, check analog wiring and control mode parameter settings. Confirm that a positive value causes forward rotation and increased encoder count, while a negative value causes reverse rotation and decreased encoder count. If the motor has a limited travel load, do not use this method. Do not apply excessive voltage during testing; it is recommended to stay below 1V. If the direction is inconsistent, adjust parameters on the control card or motor to align them. 4, suppress zero drift. In closed-loop control, zero drift affects control performance and should ideally be suppressed. Use the zero drift suppression parameters on the control card or servo, adjusting carefully until the motor speed approaches zero. Since zero drift has some randomness, absolute zero speed is not required. 5, establish closed-loop control. Re-enable the servo via the control card and input a small proportional gain. Determining what constitutes "small" relies on experience; if uncertain, input the minimum value allowed by the control card. Enable the control card and servo. The motor should now roughly respond to motion commands. 6, adjust closed-loop parameters. Fine-tune control parameters to ensure the motor moves according to the control card's commands. This is essential work based largely on experience, so details are omitted here.

Portescap motor performance

Motor technology is widely used in aviation, aerospace, and mold industries. High-speed machine tools and virtual axis machine tools represent significant breakthroughs in machine tool technology. Whether for conventional CNC machine tools or virtual axis machine tools, the key component for achieving high speeds remains the spindle unit. Spindle high-speed capability is commonly measured by the dn value (the dn value refers to the product of the average diameter (mm) of the spindle bearings and the limit speed (r/min) of the spindle). With advancements in bearing and lubrication technologies, spindle speeds have increased year by year. Data shows that after the development of oil-air lubrication devices and the adoption of angular contact ceramic ball bearings, new lubrication methods such as jet lubrication were adopted in the 90s. For spindle units with speeds above 10000r/min, drive via belts or couplings is no longer suitable; a more reasonable approach is direct drive using an built-in motor, where the rotor is mounted directly on the spindle and the stator is installed in the spindle sleeve, forming what is known as an electric spindle. This electric spindle features a compact structure, ease of balancing, and high transmission efficiency, making it an ideal structure for high-speed spindles. The performance of electric spindles is significantly influenced by bearings and their lubrication technology, as well as many other factors, including bearing preload control, heat generation and cooling of the built-in motor, dynamic balancing of the spindle, and connection of components on the shaft.

Portescap motor performance

The design of the motor spindle end is also a critical issue for high-speed electric spindles that cannot be overlooked. Bearing selection and preload technology for electric spindles mainly involve angular contact ball bearings, magnetic levitation bearings, water-based hydrostatic/hydrodynamic bearings, and air hydrostatic/hydrodynamic bearings. Due to their high cost, complex control systems, and difficult-to-resolve heating issues, magnetic levitation bearings are not yet widely applicable in high-speed spindle units. Water-based hydrostatic bearings are a popular research topic domestically; they leverage water's high heat capacity and lower bearing temperature rise to partially address the severe heating problems of conventional hydrostatic/hydrodynamic bearings, primarily used in low-speed, heavy-load applications. Air hydrostatic/hydrodynamic bearings have low radial stiffness and impact resistance but offer good high-speed performance, generally used in ultra-high-speed, light-load, precision spindles. Angular contact ball bearings with a dn value are applied in the following high-speed spindle units, meeting requirements well in terms of speed limits, load capacity, stiffness, and precision, and are standardized and low-cost. Angular contact ball bearings can also improve performance through the following methods.

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