iDealTek - Electronics' High-power DC switching power supplies have been aiding locomotive battery charging test since 2017.
September 10, 2018
iDealTek – Electronics first time provided DC power supply to CRRC's subordinate companies in October 2015 while the company was established with power supplies manufacturing for 5 months.
At that time, the thyristor-based thyristor DC power supply was provided by iDealTek, iDealTek was not the only one who proposed power supplies data sheet and prices, we were not sure and even unknown why iDealTek was chosen at a higher price, then we knew that the customer had special attention to the reliability of the power supply for long-term continuously working. And due to the unknown reliability of switching power supplies at that time, even though the switching power supplies solution provided by competitors had an advantage in price & size, the customer still purchased the thyristor DC power supply. The first cooperation started with one-unit 200V100A power supply.
In 2017, the customer needed to add two test line for expanded production plan, and found iDealTek again to seek quotations and technical solutions of 30KW power supplies.
In 2017, the switching power supplies have made great progress in magnetic materials and control topologies and improved the stability and reliability. Actually, when we got phone call from the customer, we were hesitating that why no further cooperations happen during the past two years from 2015 to 2017 while no faults were reported for the thyristor DC power supply provided before, we doubted the customer might order power supplies from others. This time, 5 units of 30KW power supplies were in need, since the power supplies this time were required to be installed into the customer's test system. We went to the customer's site to confirm the installation holes, when we arrived at the customer's work site. The on-site situation proved our doubt, there were at least 10 sets of different power supplies from different manufacturers in the customer's site. Through communication with the customer, the customer was considering on IGBT - based switching power supplies this time and stated that the switching power supply has many advantages compared to the SCR power supply:
Smaller size and lighter weight. AC/DC conversion efficiency is greatly improved. Compared with the 70%~75% conversion efficiency of SCR thyristor DC power supply, the switching power supply can reach 85% conversion efficiency under 80% load output. Under full load, the output efficiency will be even better, up to 89%. For battery charging applications that require long-term work, this will greatly save cost on grid energy. The response time is faster for transient load variance. The most important problem is that the price is cheap. Of course, except for the reliability disadvantage, the on-site switching power supplies were more or less problematic. The first SCR power supply we provided on site was still working normally.
Our High Power Switching Power Supplies
Therefore, considering reliability of the whole system for 5 units order, the customer still wanted to consult with iDealTek Electronics for this purchase. We recommended the MTP series of high-power switching power supplies that we have just developed early in 2017. As for the reliability of the long-term operation of the switching power supply that customers worried about, iDealTek - Electronics patiently explained the unique protection mechanism, control topologies of MTP series high power DC power supplies and claimed ours understanding of the causes of common problems of switching power supplies.
By increasing the primary protection, increasing the margin of IGBT components, optimizing the control loop to protect the IGBT.
The effective control of the secondary multi-level loop improves the overall internal protection mechanism of the power supply and enhances the reliability of the power supply.
The long-term full-load aging test ensures the long-term working ability of the power supply.
Finally, after 3 months of negotiations, 5 sets of 30KW power supplies entered the customer's power battery test line.
Customers still use it today and is attempting to go with our DC Power Supplies in future.
High-power DC power supply aids photovoltaic inverter test system
December 15, 2017
This is a long story-The beginning of the story
Two months after iDealTek - Electronics was established in 2015, an old friend from Texas, USA contacted us. He needed a 450V150A DC power supply to test a kind of controller. However, the specific details of controller were not told even we asked, we made a technical data sheet for him based on the thyristor power supply and linear power supply that could be made by iDealTek at that time. Because the price is too high, the linear power supply was rejected. The price of the SCR power supply was acceptable, but it is stuck in the output response time index. The transient response time of nearly 500ms is almost unable to meet the load change rate of the controller to be powered by the DC power supply. Because iDealTek - Electronics has no other reliable solutions for that time being, the communication between the two parties temporarily stopped.
The right time with the right power supply
In June 2017, we promoted our newly developed MTP series of high-power DC power supplies. There is no doubt that our sales team would send promotion mails to both new and old customers. Then, this American friend contacted us again, he happened to need one 900V 100A power supply for the same purpose. He thought that the MTP-1000-0100T in our MTP series power supply family is just the power supply he wanted, but need to modify the input voltage to 480Vac and the output voltage and current also need to be reduced to control the cost, and asked if we can customize for one unit order. We accepted the customized demand, and the power supply was be purchased in August 2017.
Discovered the photovoltaic inverter application
At the end of 2017, we received an inquiry from a U.S. company and mentioned the power supply we sent in August. We were asked about 5 units high-power DC power supplies, and put forward detailed technical parameters, connected loads, loads characteristic and wiring diagrams, etc. And at that time, we knew the final use, and we also knew that what the MTP power supply should be adjusted to match the application. The final order with a total power of 700KW was delivered in June 2018.
Based on the iDealTek's broad power products line, with continuous technological innovation, to provide customers with ideal and reliable DC power supplies, high-voltage power supplies and special customized power supplies.