How to choose the voltage stabilizer for medical equipment?

With the advancement of technology, various precision medical diagnostic equipment such as spiral CT, MRI, DR, CR, DSA, ECT, linear accelerator, digital gastrointestinal machine, gamma knife, biochemical instrument, color ultrasound, etc. have become symbols of modern hospitals. At the same time, how to ensure the stable and reliable normal operation of these precision equipment has naturally become a focus of attention for medical departments. So what are the reasons that affect the normal operation of these precision medical equipment? We have identified the main cause of precision medical diagnostic equipment failures through analysis of equipment failures in multiple hospitals - power quality.

With the widespread application and development of power electronics technology, a large number of nonlinear loads have been added to the power supply system, from low-voltage small capacity household appliances to high-voltage large capacity industrial AC/DC conversion devices. During the operation of electric arc furnaces, large steel mills, electric locomotives, etc., not only do they generate a large number of high-order harmonics, but also cause voltage fluctuations, flicker, and three-phase imbalance to become increasingly serious. These adverse effects on the power grid not only reduce the safety of the power supply and consumption equipment itself, but also seriously weaken and interfere with the economic operation of the power grid, causing serious harm to the power grid. Let's analyze the impact of power supply quality on medical equipment based on actual situations:

1. Voltage fluctuation: This is a common problem in the power grid, and the normal range of voltage fluctuation in the power grid should be ≤ 10%. However, in China, the voltage in the power grid usually exceeds this range, with a fluctuation range of ± 15% or even ± 20%, such as fluctuations caused by load fluctuations, fluctuations caused by other electrical equipment in the power grid when starting or stopping, fluctuations caused by certain electrical equipment with special working characteristics, and peaks and valleys in electricity consumption. Continuous high or low voltage can cause faults in the power supply system of equipment, such as CT devices, which belong to intermittent instantaneous working mode. During system scanning, the load increases rapidly, while when not scanning, the load is very light. The power grid must adapt to this working mode and always maintain normal power supply quality. Otherwise, it may cause the fuse to burn out, and in severe cases, it may damage the power system of the entire equipment. This is also the main reason for the frequent failures of precision medical diagnostic equipment directly connected to the power grid.

2. Frequency offset: The frequency standard of China's power supply network is 50Hz. Due to the unstable operation of emergency generators or the power supply from unstable frequency sources, it will have a significant impact on some high-precision medical equipment that requires mains frequency synchronization or as a reference.

3. Power supply interference: Power supply interference can be divided into peak voltage, surge voltage, noise interference, odd harmonics, etc. These interferences are quite serious in China's power grid. Strong interference can cause damage to the circuit boards of medical equipment, computer control disorders, and unstable high-voltage systems, endangering the safety of the entire machine.

4. Improper configuration of internal power supply system: With the development of hospitals, new electrical equipment is constantly introduced, and hospitals cannot continuously carry out power grid transformation. This leads to too many loads connected to existing transformers, resulting in insufficient capacity of power supply transformers; The diameter of the power supply line is too thin; There are phenomena such as devices with high power and frequent startup connected in the same circuit or too many electrical devices connected in the same circuit. Due to the fact that precision medical diagnostic instruments typically contain a large number of electronic computers and large-scale integrated circuits, the machines themselves are highly sensitive to power sources. These power quality issues can cause computer crashes, data transmission errors, and even damage to equipment components.

In summary, effective improvement of power quality is the root cause of ensuring the normal operation of precision medical equipment. A comprehensive analysis has been conducted on the five aspects of power quality, including voltage deviation, high-order harmonics in the public power grid, voltage flicker and fluctuation, three-phase voltage and current imbalance, frequency deviation, etc. From a professional perspective, solutions have been found for users. We believe that installing a high-precision intelligent AC voltage regulator from Shenzhen Jingyuan Technology is to improve the power quality of medical equipment, A good way to ensure the normal operation of equipment.

AC voltage regulators can be found everywhere on the market, with a wide variety of types, but not every type of voltage regulator can be used freely. The following are two AC voltage regulators developed and produced by our company that are suitable for large medical equipment for your reference:

1、 Compensation type tap changer voltage regulator

It has large capacity, high efficiency, no waveform distortion, strong load capacity, protection function, automatic adjustment of three-phase imbalance, and easy movement. Economical and environmentally friendly, suitable for DR and general CT use.

2、 High precision intelligent purification regulator

The SWDT series high-speed contactless voltage regulator, a patented product independently developed for the electrical characteristics of medical equipment, adopts a series of advanced technologies, which not only ensures the improvement of purified power quality in low power quality environments, but also meets the high requirements of precision medical diagnostic equipment for power supply quality; And it can also have a shielding effect on various interferences. It can even improve certain defects in the original power supply system. For example, solving the problem of insufficient power supply capacity has completely solved all power supply issues that affect the normal operation of precision medical diagnostic equipment.

1. Quick response. This power supply is not only suitable for linear loads, but also for nonlinear loads. This voltage regulator is controlled by a computer. It can quickly respond to changes in electricity supply and load. The voltage adjustment time is ≤ 0.04s, which is very suitable for the extremely fast voltage adjustment speed requirements of imported high-power multi-layer spiral CT machines and other equipment.

2. Three phase split regulation allows for load imbalance. This power supply is independently calculated and adjusted according to the situation of each phase, and can make the output voltage of each phase consistent in a very short time. The accuracy is extremely high, with a voltage stabilization accuracy of 380V ± 1%.

3. A truly non-interference green power supply, this power supply does not have any adverse effects on its own equipment, as well as the power grid and other equipment, especially suitable for medical systems.

4. No harmonic distortion, can be used to connect any precision medical diagnostic equipment. Even telecommunications systems and military units that require high waveform requirements are fully applicable.

5. There is no limit on the upper limit of power, especially suitable for high-power applications.

6. There is a comprehensive protection technology that can protect against various interferences, lightning strikes, and power supply phase loss, ensuring the normal operation of the power supply and equipment.

Jingyuan Technology's SWDT series high-speed contactless voltage regulator has been used as a supporting power source for imported spiral CT, magnetic resonance MR, DR, digital gastrointestinal machines, large C-arms, vascular imaging systems, ventilators, monitors and other large precision medical diagnostic equipment in multiple hospitals across the country. We have played a significant role in ensuring the safe, stable, and reliable operation of these large-scale precision medical diagnostic equipment, and have made our due contribution to the modernization construction of China's medical and health industry.