Induction Coils for Medical Industry

Induction Coils for Medical Industry

Mainly used for signal processing, resonance, receiving, transmitting, etc.

Size, shape and characteristics can be customized, and high mechanical processing strength.

Simple structure, high inductance accuracy, small distribution capacitance, high self-harmonic frequency, small temperature coefficient, good stability, and strong anti-interference ability.

Core induction coils are insulated from each other by winding insulating tubes with wires. The insulated tube can be hollow or contain iron core or magnetic powder, referred to as iron core coil inductance. The units are henry(h), menry(MH), menry(uh), 1h=103mh=106mh.

Filtering function: As the switching power supply uses 100k frequency pwm, the switching state will generate high harmonic interference, causing pollution to the power grid and circuit, so it is necessary to use Inductors directly low frequency, capacitors directly high frequency filtering high harmonics. Therefore, series inductors and capacitors are required. The equivalent resistance of inductor Rl = 2*PI*f*L and equivalent resistance Rc = 1/(2*PI*f*C). The general inductance is 10-50mAh (assuming the inductor is not magnetically saturated), and the capacitance is 0.047mAh, 0.1mAh, etc. Assuming an inductor of 10mH and a capacitor of 0.1uF, for 1MHz harmonic interference, RL=2*3.14*1meg*10mh. Obviously, the high frequency signal will generate a large voltage drop after passing through the inductor, and then bypass through the capacitor to reach the ground, thus filtering out two kinds of spurious waves from the power supply circuit and the grid.