How to choose a variable speed drive?

 The variable speed drive generally uses a 4-level motor, the base frequency operating point is designed to be 50Hz, the frequency is 0-50Hz (speed 0-1480r/min), and the motor runs at constant torque, frequency 50-100Hz (speed 1480-2800r/min). The motor runs at constant power within the range of min), and the entire speed regulation range is (0-2800r/min), which basically meets the requirements of general drive equipment. Its working characteristics are the same as those of the DC speed regulating motor, and the speed regulation is stable and stable. If you want to increase the output torque within the constant torque speed regulation range, you can also choose a 6-level or 8-level motor, but the motor size is relatively large.

Since the electromagnetic design of the variable speed drive adopts flexible CAD design software, the fundamental frequency design point of the motor can be adjusted at any time, and we can accurately simulate the working characteristics of the motor at each fundamental frequency point on the computer. The constant torque speed regulation range of the motor has been expanded. According to the actual working conditions of the motor, we can make the power of the motor larger under the same frame size, or use the same frequency converter on the basis of the motor. Improve the output torque of the motor to meet the design and manufacturing requirements that the motor is in the best state under various working conditions. The frequency conversion motor can be equipped with an additional speed encoder, which can realize the advantages of high-precision speed regulation, position control, and fast dynamic response. It can also be equipped with a motor-specific DC (or AC) brake to achieve fast, effective, stable and reliable braking performance of the motor.

With the basic frequency adjustable design of the variable frequency drive, we can also manufacture various high-speed motors, which maintain constant torque characteristics during high-speed operation, and can replace the original intermediate frequency motors to a certain extent, with affordable and low prices. The frequency conversion motor is a three-phase AC synchronous or asynchronous motor. According to the output power of the inverter, there are three-phase 380V or three-phase 220V, so the motor power is also different from three-phase 380V or three-phase 220V. Generally, inverters below 4KW have three-phase 380V or three-phase 220V. Phase 220V can be used. Since the variable frequency motor is divided into different constant power speed regulation area and constant torque speed regulation area according to the fundamental frequency point (or inflection point) of the motor, the setting of the fundamental frequency point and the inverter is very important.

The source manufacturer of Dolycon AC drive, the raw materials are directly purchased from the first-hand source of big-name manufacturers, and the manufacturing cost is reasonably controlled. The inverters all use imported brand components to meet the strict application requirements of domestic and foreign users. It supports the curing of non-standard parameters of inverter software, which effectively simplifies the debugging process of customer equipment. Welcome to consult.