Inductors for Robotics
Product Overview
Inductors are passive electronic components that storeenergy in a magnetic field when current flows through their windings. Theyoppose rapid changes in current and are widely used in robotic power supplies,motor-control circuits and communication interfaces.
In robot power systems, shielded power inductors work withswitching controllers, MOSFETs and capacitors to convert battery voltage intostable power rails for processors, sensors, communication circuits and motorcontrollers.
Key Functions
Stores energy during switching-power conversion
Smooths pulsating current
Reduces voltage and current ripple
Supports buck, boost and buck-boost converters
Filters high-frequency electrical noise
Suppresses electromagnetic interference
Provides stable current to processors and sensors
Supports motor-drive and battery-power circuits
Isolates noisy and sensitive power branches
Improves power-conversion efficiency
Typical Applications
Robot power-management PCBs
Main-control and AI-computing boards
Motor-driver and joint-control systems
Battery-management systems
Sensor and vision circuits
CAN and Ethernet interfaces
Wireless communication modules
DC-DC power converters
Input and output EMI filters
Humanoid robots, AGVs and AMRs
Common Inductor Types
Inductor type | Typical use |
Shielded Power Inductor | DC-DC conversion and high-current power rails |
Molded Power Inductor | Compact, low-EMI power conversion |
Wire-Wound Inductor | Power filtering and energy storage |
Multilayer Chip Inductor | RF and high-frequency signal circuits |
Ferrite Bead | High-frequency noise suppression |
Common-Mode Choke | Reduces common-mode noise on cables and interfaces |
Coupled Inductor | Multi-output converters and special power topologies |
High-Current Inductor | Motor control and high-power converters |
Inductor Construction
Copper Winding
The copper winding carries current and creates a magneticfield. Wire thickness affects current capacity and DC resistance.
Magnetic Core
The ferrite or metal-composite core concentrates magneticflux and increases inductance.
Magnetic Shield
A shielded construction confines more of the magnetic fieldinside the component, helping reduce interference with nearby sensors andcommunication circuits.
End Terminations
The two metal terminals connect the winding to the PCBsolder pads.
Molded Body
In molded power inductors, the magnetic composite materialsurrounds the coil to provide shielding, mechanical strength and heat transfer.
Main Components Around the Inductor
Buck Controller or PMIC
Controls the switching sequence and output voltage of thepower converter.
Power MOSFETs
Rapidly switch the input voltage, producing the pulsedwaveform supplied to the inductor.
Input Capacitors
Provide switching current and reduce ripple returned to thebattery or upstream power rail.
Output Capacitors
Work with the inductor to smooth the switched waveform intoa stable DC output.
Feedback Resistors
Measure the output voltage and provide feedback to theregulator controller.
Current-Sense Components
Monitor inductor or load current for regulation andprotection.
TVS Diode and Fuse
Protect the power input against voltage transients,excessive current and short circuits.
Ferrite Beads
Suppress high-frequency noise on sensitive analog, sensorand communication power branches.