Which Transformers Are Best For Electrical Isolation In Medical Devices - Miracle Electronics
With a multitude of transformer options available, identifying the best one out of the lot becomes difficult, for every individual application. And, the application that we are going to speak about in this blog is a critical one – medical devices. No kind of fault can be afforded in the case of medical applications. This is why only the most ideal kind of transformer that can offer safety and protection against electrical surges should be used. So, which one is it?
Toroidal transformers is the answer. Toroidal transformers are ideal for electrical isolation in medical equipment as they are compact, have low stray fields, and can be encapsulated when required. Hence, these transformers are less likely to cause electromagnetic disturbances. Isolation is when two parts of a circuit are physically and electrically separated, which is achieved by using electromagnetic field coupling between the two circuits. Isolation provides several safety advantages like breaking ground loops, improving common-mode voltage rejection, and permitting the two parts of the circuit to be at different voltage levels. For an isolation method to be safe enough for use in medical equipment, it needs high-integrity isolation components and a safe insulator barrier. The three most commonly used isolation methods include transformers, capacitive couplers, and optocouplers. But, in this blog, we will focus on the use of transformers to electrically isolate medical equipment.
A transformer transfers energy between two or more circuits through electromagnetic induction. They increase or decrease the voltages of alternating current in electric power applications, by passing a varying current through the primary winding to generate a magnetic flux in the transformer’s core, which in turn induces a voltage in the transformer’s secondary winding.
Toroidal cores are made form a continuous strip of silicone steel wound like a tight clock spring, with the ends tacked into place with small spot welds to prevent the coiled steel from unwinding. The core is insulated with an epoxy coating or a set of caps or multiple wraps of insulating film. The transformer’s windings wound around the core require additional insulation to be isolated. However, the construction of a toroidal transformer is very labour-intensive. But yet, these transformers are preferred more than any other transformer because of its performance. With the continuous strip of steel used in the core, the transformer becomes smaller, lighter, more efficient, and quieter than other kinds of transformers. These qualities are the most apt for sensitive medical electrical equipment; and clearly justify the additional expense.
Thus, to conclude, toroidal transformers are ideal for electrical isolation in medical equipment. So, if you are looking for the perfect transformer for your application, just get in touch with Miracle Electronics, a reliable and reputed medical transformer manufacturer in India, who can provide you with the most ideal toroidal medical isolation transformer . And, you can rest assured about the quality of transformers you will get here because every medical isolation toroidal transformer you’ll get will be RoHS and REACH compliant, adhering to the regulations under UL 60601-1 standards.
