What Are Motors, Actuators, Solenoids and Drivers?
This category covers electromechanical motion components: DC motors, stepper motors, servo motors, BLDC motors, solenoids, linear actuators, and their associated driver ICs/modules. Motors convert electrical energy to rotational motion; solenoids produce linear motion; actuators provide controlled positioning. LCSC stocks 5,000+ motor and actuator SKUs from 80+ manufacturers.
Motors, Actuators, Solenoids and Drivers — Definition and Sub-Categories
A motor is a device that converts electrical energy into mechanical rotation. Actuators produce controlled motion (rotational or linear) in response to electrical signals. Solenoids create linear push/pull force using electromagnetic coils. Driver circuits provide the power and control signals these devices need to operate.
|
Sub-Category |
Function |
Key Parameters |
|
DC Motors |
Continuous rotation from DC power |
Voltage, no-load speed (RPM), stall torque, current |
|
Stepper Motors |
Precise angular positioning without feedback |
Step angle (1.8°/0.9°), holding torque, phases, current |
|
Servo Motors |
Closed-loop position/speed control |
Torque, speed, feedback type, size |
|
BLDC Motors |
Electronically commutated brushless DC motors |
KV rating, torque, power, pole count |
|
Solenoids |
Linear push/pull electromagnetic actuators |
Force, stroke, voltage, duty cycle |
|
Motor Driver ICs |
Control circuits for motor power and direction |
Motor type, voltage/current, control interface |
How to Choose: Motors, Actuators, Solenoids and Drivers Selection Guide
Choose motor type by motion requirements: DC motors for simple continuous rotation, stepper motors for precise open-loop positioning (3D printers, CNC), servo motors for closed-loop position control (robotics), and BLDC for high-efficiency high-speed applications (drones, fans). Size the motor for your torque and speed requirements with a 30% margin. Always use an appropriate driver IC or module — never drive motors directly from MCU GPIO pins.
Motors, Actuators, Solenoids and Drivers Comparison
|
Motor Type |
Control Complexity |
Positioning |
Efficiency |
Best Application |
|
Brushed DC |
Simple (H-bridge) |
No native positioning |
60–75% |
Toys, pumps, basic drives |
|
Stepper |
Medium (step/dir driver) |
Open-loop positioning |
40–70% |
3D printers, CNC, camera gimbals |
|
Servo (hobby) |
Simple (PWM signal) |
Closed-loop (potentiometer) |
Varies |
Robotics, RC, pan-tilt |
|
BLDC |
Complex (ESC/FOC driver) |
With encoder: precise |
85–95% |
Drones, EV, industrial fans |
Why Source Motors, Actuators, Solenoids and Drivers from LCSC Electronics
LCSC stocks 5,000+ motor/actuator SKUs alongside motor driver ICs from TI, ST, Allegro, and Asian manufacturers. This enables engineers to source the complete motion control subsystem — motor, driver IC, connectors, and support components — from a single vendor.
Frequently Asked Questions
Q: What is the difference between a stepper and servo motor?
Stepper motors move in discrete angular steps (typically 1.8° per step) without feedback — simple but can miss steps under overload. Servo motors use closed-loop feedback (encoder or resolver) to verify and correct position continuously, providing higher accuracy and dynamic response at higher cost and complexity.
Q: How do I choose a motor driver IC?
Match the driver to your motor type (brushed DC, stepper, BLDC), maximum voltage, and maximum continuous current. Popular choices include L298N and DRV8871 for brushed DC, A4988 and TMC2209 for steppers, and DRV8301 for BLDC. Add 30% current headroom above your motor’s rated current.
Q: What is an H-bridge?
An H-bridge is a circuit with four switches (transistors/MOSFETs) arranged so that a motor connected between them can be driven forward, reverse, or braked by controlling which switches are on. It’s the fundamental building block for bidirectional DC motor control. Many motor driver ICs integrate H-bridges on-chip.
Q: What is a solenoid used for in electronics?
Solenoids produce linear push or pull motion when energized. Common applications include door locks, valve actuation, pin-strike mechanisms, and relay-like applications requiring linear (not rotational) motion. They’re powered by DC voltage and controlled with a transistor and flyback diode, similar to relay drive circuits.