Miracle Electronics

Other Details

We are manufacturers of Toroidal Inductors that comes with higher Q factors, higher inductance, self-shielding, less leakage inductance and lower electromagnetic interference (EMI). These Toroidal inductors feature low loss and have a variety of options suitable for a wide range of applications. Our toroidal inductors and transformers are open to a variety of applications such as high-frequency coils and transformer and power supply.

Features: 

• DC/DC converter, EMI filter applications

• Low radiation

• Low core loss

• High current capacity

• Horizontal or vertical mount

• Operating temperature -55 to 105°C

Common Mode Chokes:

• Common Mode Chokes are used when many electrical devices may be connected to the same power lines (or power supply lines) and therefore substantial electrical noise can exist on these lines

• Line filters prevent excessive noise from being conducted between electronic equipment and the AC line. Noise is typically common to both lines and in the same direction

• Common mode chokes are designed so that common mode current creates a magnetic flux (through mutual inductance) that adds to attenuate the CM noise signal

• The normal (differential) mode currents create magnetic flux that ideally cancel each other out so the normal signal frequencies are not attenuated

• Any inductance encountered by the differential signal is the result of imperfect coupling of the two coils

Design requirements for a Toroidal Inductors: 

• Typical minimum requirements to be specified for a Toroidal inductor design are:

• No load inductance in uH

• Full load inductance in uH

• DC Current in Amperes

• AC Current in Amperes peak to peak

• Operating frequency is needed for core calculations and wire sizing

• Core material is selected for the known operating frequency or frequencies

• Other Toroidal inductor design considerations are space limitations and mounting technique

• Lead terminations are also specified through the design of a Toroidal inductor

8 Operating Principles: 

• DC/DC converter, EMI filter applications

• Magnetizing (No-Load) Current

• Voltage Drop

• Voltage-Time Product

• Kickback Voltage

• Secondary Load Current

• Effects of Winding Capacitance

• The Trailing Edge

• Pulse Distortion