Sinrace Power Supply Technology (Shenzhen) Co., Ltd.

Safety and isolation
Security and isolation is a significant difference between common commercial power supply with medical power supply. In general, except for some experimental analysis class equipment, medical equipment mostly is installed near the bed or operating table, and closed to the person and operator, the case is often touched by them. There are a variety of strong, weak parts in the interior of medical devices, if the isolation of the strong and weak electricity and casing material have problems, it will be very dangerous.

In safety testing , general medical device power must have UL60601-1, C-UL, EN60601-1 and so on safety certifications. Inputs and outputs must be more than 4,000 V isolation voltage, and requires low-to-ground leakage current, and comply with safety requirements for creep age distances. For the strong electricity it needs to be double insulated, in particular about insulation design for contacting with the enclosure .

Electromagnetic compatibility and capacity of electromagnetic anti-interference

It should select and build a power supply system for medical devices , must pay attention to improve the electromagnetic compatibility and electromagnetic anti-interference capacity of power supply. Mainly consider the following aspects :

Design. The design and layout of PCB, the general power supply will contain a number of high-frequency signal, any trace lines on PCB can play the role of antenna , length and width of trace line will affect the resistance and inductance, thus affecting the frequency respond , and in a timely manner by the DC signal trace line ,it will be coupling the nearby trace line to radio-frequency signal and cause circuit problems .

Shield. In order to suppress radiation generated by switching power supply, eliminate influence of electromagnetic interference on medical equipment and other electronic equipment, the best way is to shield the power magnetic field , then the shield can and the enclosure of medical devices or earth are as a single entity, This is a more effective way.

Certification. At this stage the general medical device power need to go through FCC-B, CISPR22-B, EN55011 \ 55022 \ 61204 \ 61000 and other electromagnetic compatibility and electromagnetic interference tests.

Size and high power density. In addition that the medical devices are developed to the direction of multi-function, high-precision test and adjustment, smaller size and portability is also a direction. Which requires the power for medical equipment has a higher power output on the condition of a smaller board area .

Special applications. Currently centralized power supply products in the market mostly are standard output, even if some power supplies have a output adjustment by way of circumscribed circuit, adjustment range is not large, but stability is also problematic.

Price. Today, the price of medical equipment has gradually transparent because of the intensity of competition, especially some small home medical equipment, prices have been very popular and of plebification . So this requires that an important part of medical equipment - power, must have a competitive price.

Here introduce several special power series for medical equipment and practical application cases of Excelsys company .

development by Excelsys, all products undergo rigorous EN60601-1 and UL2601-1 safety testing and a number of electromagnetic protection test, the input to output isolation voltage of 4,000 VAC, low leakage current to ground at 300μA, creepage distances comply with safety requirements in 44.5 × 260 × 89mm package (1U height) of up to 750W maximum power output, providing four different slot options, you can choose 8 different output combinations, Output voltage 1.5V-58V range, and the output is adjustable up to 90% efficiency. All combinations can be freely configured by the customer demand (see specific allocation table), is very characteristic. Xrite series of basic parameters and Xmite series of similar, is the low noise version of the series, the measured noise is not higher than full load 54dB. The company's products also can target specific customer needs vibration, electromagnetic radiation, temperature, certification and control in specially designed and tested specific technical applications, please contact technical support CLP China Star team.

Total power of device is about 1,100 W, which meet the medical equipment certification, it need four different DC output, the first is the high current 48V, 20A for the laser equipment, followed by the need for a 18V for LCD displays, once again requires a 5V for control panel and, finally requires a 12V for system cooling fan.