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Description
Overview
Essential details：DVSC-TT-14C-09 VISION DVSD-TA SERIES
The main features of DVSC-TT-14C-09 servo AC driver include: High performance: Using high performance digital signal processor and AC motor to achieve high precision and high-speed motion control. A variety of control methods: support position control, speed control, torque control and other control methods to meet different application needs. Flexible interface: supports a variety of communication protocols and control interfaces for easy connection and integration with controllers and other devices. Easy to debug and configure: Provides a user-friendly interface and easy-to-use debugging tools for users to configure and debug parameters. High reliability: The use of high-quality electronic components and materials, through strict quality control and testing, to ensure long-term stable operation. In short, the DVSC-TT-14C-09 servo AC driver is a high-performance, highly reliable servo driver that can meet a variety of high-precision motion control needs. The control mode of servo AC driver is mainly as follows: position control mode: The speed is determined by the frequency of external input pulses, and the rotation Angle is determined by the number of pulses.
The correct selection of frequency converter is very critical to the normal operation of the control system. When selecting a frequency converter, it is necessary to fully understand the load characteristics driven by the frequency converter. In practice, people often divide production machinery into three types: constant torque load, constant power load and fan and pump load.
1, according to the load characteristics to select the frequency converter, such as the load for constant torque load need to select the frequency converter, such as the load for the fan, pump load should choose the fan, pump type frequency converter. Because the fan and pump will increase the torque with the speed. The torque is small when starting.
2, the selection of frequency converter should be based on the actual motor current value as the basis for the selection of frequency converter, the rated power of the motor can only be used as a reference. In addition, it should be fully considered that the output of the inverter contains rich high-order harmonics, which will make the power factor and efficiency of the motor worse. Therefore, compared with the power supply with the power frequency grid, the current of the motor will increase by 10% and the temperature rise will increase by about 20%. Therefore, when selecting the motor and frequency converter, this situation should be taken into account, and the appropriate margin should be left to prevent the temperature rise from being too high and affecting the service life of the motor.
3, if the frequency converter wants to run a long cable, measures should be taken at this time to inhibit the impact of the long cable on the ground coupling capacitance to avoid insufficient output of the frequency converter. Therefore, the inverter should amplify one or two gears to select or install an output reactor at the output end of the inverter.
4, for some special applications, such as high ambient temperature, high switching frequency (especially in building automation and other applications with high noise limits), high altitude will cause the capacity reduction of the frequency converter, and the frequency converter needs to be amplified.
5, when the frequency converter is used to control several motors in parallel, it is necessary to consider the variable height, etc., the total length of the cable from the frequency converter to the motor is within the allowable range of the frequency converter. If the specified value is exceeded, zoom in one or two gears to select the inverter. In addition, in this case, the control mode of the inverter can only be V/F control mode, and the inverter can not realize the over-current and overload protection of the motor, at this time, it is necessary to add a fuse on the side of each motor to achieve protection.
DVSC-TT-14C-09
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sunny He
[Email] sales@xiongbagk.cn
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DVSC-TT-14C-09Â VISION DVSD-TA SERIES
6, the use of frequency converter to control the high-speed motor, due to the small reactance of the high-speed motor, will produce more high order harmonics. These high order harmonics will increase the output current value of the inverter. Therefore, when choosing a frequency converter for a high-speed motor, it should be slightly larger than that of an ordinary motor.
7. When the frequency converter is used for the variable pole motor, full attention should be paid to the selection of the capacity of the frequency converter so that its maximum rated current is below the rated output current of the frequency converter. In addition, when the pole number is converted in operation, the motor should be stopped first, otherwise the motor will be idled, and the inverter will be damaged.
8. When driving explosion-proof motors, the frequency converter has no explosion-proof structure, and the frequency converter should be set outside the dangerous place.
9. When the frequency converter is used to drive the gear reduction motor, the scope of use is restricted by the lubrication method of the gear rotating part. When lubricating oil is lubricated, there is no limit in the low speed range; In the high speed range above the rated speed, there is a risk of running out of lubricating oil. Therefore, do not exceed the maximum permissible speed.
10. When the inverter drives the winding rotor asynchronous motor, most of them use the existing motor. Compared with the ordinary squirrel cage motor, the winding impedance of the winding motor is smaller. Therefore, it is easy to occur due to the phenomenon of over-current tripping caused by ripple current, so a frequency converter with a slightly larger capacity than usual should be selected. Generally, the winding motor is mostly used for the flywheel torque GD2 is larger, and more attention should be paid to setting the acceleration and deceleration time.
11, when the inverter drives the synchronous motor, compared with the power frequency power supply, the output capacity will be reduced by 10% to 20%, and the continuous output current of the inverter is greater than the product of the rated current of the synchronous motor and the per unit value of the synchronous pull-in current.
12, for compressors, vibrators and other torque fluctuations large load and hydraulic pump peak load, if according to the rated current or power value of the motor to select the inverter, it may occur due to the peak current to overcurrent protection action phenomenon. Therefore, it is necessary to understand the power frequency operation and choose a frequency converter with a rated output current greater than its maximum current.
13, when the frequency converter drives the submersible pump motor, because the rated current of the submersible pump motor is larger than the rated current of the usual motor, the rated current is greater than the rated current of the submersible pump motor when the frequency converter is selected.
14, when the inverter controls the Roots fan or special fan, because the Roots fan is a volume blower, it has the characteristics of high output wind pressure. From the motor characteristics, its torque characteristics are approximately constant torque characteristics, and its starting current is very large, so when selecting the inverter, we must pay attention to whether the capacity of the inverter is large enough.
15, when selecting the inverter, we must pay attention to whether its protection level matches the situation on the site. Otherwise, the dust and water on the site will affect the long-term operation of the inverter.
16, single-phase motor is not suitable for inverter drive.
17, if the power supply of the inverter is a self-provided power supply, it is best to add an incoming reactor.
18, when the motor load is very light, even if the motor load current is within the rated current of the inverter, the inverter that is much smaller than the motor capacity cannot be used. This is because the reactance of the motor varies with the capacity of the motor, even if the motor load is the same, the greater the motor capacity, the greater the pulsating current value, so it is possible to exceed the current allowable value of the inverter.
