Differences between servo electronic transformers and traditional dry-type transformers
Servo electronic #transformer# is an ultra-small three-phase servo transformer specially designed for the mismatch between the voltage required by the power grid in my country and the AC servo motor. It has changed the problems of bulkiness, heat generation, power consumption and difficult installation of the existing traditional coil-type transformers; it does not cause pollution to the power grid, and is an ideal product for solving the problem of power adapters in industrial control systems. It is essentially different from power frequency transformers. A qualitative leap.
The intelligent servo electronic transformer uses the principle of closed-loop and semi-closed-loop control of the servo system, and dynamically tracks the load through intelligent sensing elements. As much energy as the servo motor needs, the servo transformer outputs as much energy, thereby achieving the purpose of saving energy and reducing consumption. Different from the traditional iron core transformer, it realizes 380VAC to 200VAC or 220VAC through the combination of high-power switching tube, intelligent sensor and intelligent control system, which directly replaces the traditional three-phase dry-type transformer, and does not use thyristor which is easy to generate harmonics. As a switching device, there is no harmonic output, which purifies the power grid and plays a certain role in protecting the servo drive.
Second, the stability of energy everywhere:
People do not pay attention to the traditional power frequency transformer, in fact, the voltage of the power frequency transformer is unstable. This instability is reflected in at least the following two aspects: a: The influence of grid voltage fluctuations. Since the grid voltage is impossible to stabilize, and the power frequency transformer has no voltage stabilization effect, the peak and valley of the grid will affect the performance of the servo system. In some areas where the power grid is heavily loaded, the output power of the servo motor shaft will drop seriously during the peak period of power consumption. b: The internal resistance of the power frequency transformer itself causes the softening of the output current curve. This is caused by the magnetic leakage, iron core reluctance and line resistance of the power frequency transformer, which cannot be fundamentally eliminated. When the servo motor starts and overloads, it draws an overcurrent that is several times the rated current from the power supply. If the power supply cannot be supplied, it will cause start-up hysteresis, synchronization inaccuracy, and inaccurate positioning.
The SET series electronic transformer modules of Shenzhen Servo Electric Industrial Co., Ltd. do not have the above problems. This is because the energy supplied to the servo system by the SET series products does not change with the change of the grid voltage. What it supplies to the servo system is the dynamic current, which is given according to the energy required by the servo controller. This hard output curve ensures the fast response capability of the servo system. The voltage is only used as an upper limit, as a guarantee for the safety of the power input of the servo system. On the other hand, SET series products can eliminate EMI interference more thoroughly.
3. The difference in price
Due to the manufacturing cost of traditional power frequency transformers, its price cannot be very low. Judging from the current market sales price of SET series products, they are far lower than the sales price of the same amount of power frequency transformers. Although it is not a very prominent problem for the overall cost of CNC machinery, after all, low-cost, high-performance products are undoubtedly the best choice to replace high-cost, low-performance old-fashioned products.
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