A Hall sensor brushless motor — a sensored BLDC motor — carries three Hall-effect sensors in the stator so the driver knows rotor position before the first commutation step. We build Hall sensor brushless motors across our 16mm–60mm BLDC frame sizes, with three Hall-effect sensors built into the stator for reliable low-speed starting torque and simple six-step commutation.
Hall sensor feedback sits between sensorless control and full encoder feedback: it costs more than sensorless, but far less than an encoder, and delivers predictable torque at zero and low speed.
| Sensorless | Hall Sensor | Encoder | |
|---|---|---|---|
| Startup torque reliability | Can stall or jerk at zero/low speed; relies on back-EMF sensing that isn't available at standstill | Reliable — rotor position is known before the first phase switch | Reliable, plus precise position/speed data throughout the range |
| Wiring | Motor phase wires only (typically 3) | Phase wires + 3 Hall signal wires + sensor power/ground (commonly 5–6 total) | Phase wires + encoder channel wires (often more conductors than Hall) |
| Typical use case | Fans, pumps, and other loads that don't need accurate low-speed control | Pumps, actuators, robotic joints, and equipment needing dependable low-speed starting torque | Positioning stages, closed-loop servo applications needing fine resolution |
| Relative cost/complexity | Lowest | Moderate | Highest |
For loads that run at speed once started, sensorless brushless motors are the better starting point, while fine-resolution closed-loop servo control calls for encoder-equipped BLDC motors.
Hall-sensor commutation is built into our brushless DC motor line across the frame sizes and voltage classes below, with catalog datasheet values for the listed windings.
| Frame | Voltage Windings (applied range) | No-Load Speed | Torque & Output at Max Efficiency | Gearbox Option |
|---|---|---|---|---|
| 16mm 1636 coreless BLDC | 12V / 24V (3–24V) | 12,000 rpm | 32.6 g·cm rated at 10,000 rpm | Planetary 14:1–1621:1 |
| 22mm BLDC | 12V / 18V / 24V (6–24V) | 3,100–8,600 rpm | 270–380 g·cm, 10–27.5W, up to 75.3% efficiency | Planetary available |
| 24mm BLDC | 9V / 12V / 24V (6–48V) | 5,400–8,700 rpm | 48.6–67.2 g·cm, up to 4.84W | Gearbox 4:1–500:1 |
| 28mm BLDC | 7.4V / 12V / 24V (6–48V) | 4,800–11,800 rpm | 90–156.8 g·cm, 3.6–16.5W | Planetary 4:1–625:1 |
| 36mm BLDC | 12V / 18V / 24V (6–48V) | 5,200–7,500 rpm | 175–209 g·cm, 7.4–12W | Planetary 3.7:1–721:1 or worm |
| 42mm BLDC | 12V / 18V / 24V (6–48V) | Per winding | 10–27W | Planetary 3.7:1–721:1 |
| 60mm BLDC | 12V / 18V / 24V (6–48V) | Per winding | 10–27W, stall current 6.38–7.84A | Bare motor |
These figures help you pick a starting frame size, not replace a real spec conversation. Contact SLW Motor with your target torque, speed, and duty cycle.
Three Hall ICs at 120° electrical intervals confirm rotor position before the motor starts moving.
The controller reads the sequence and drives the same stator and rotor phase switching that turns the motor. stator and rotor phase switching
Unipolar, omnipolar and bipolar latch detection shape the switching pattern the commutation circuit reads.
Most field issues trace to wiring or the driver interface, not the motor.
Sensored BLDC motors commonly break out to a connector with these signal lines, though pinout and wire colors vary by manufacturer and should always be confirmed against the specific unit's datasheet:
| Signal | Function |
|---|---|
| Sensor supply (commonly 5V) | Powers the three Hall ICs |
| Hall U / Hall V / Hall W | Digital position signals feeding the controller |
| Sensor ground | Common return for the Hall supply |
| Phase U / Phase V / Phase W | Motor winding connections carrying drive current |
Keep sensor supply and ground separate from the phase drive-current wiring to reduce switching noise on the low-level Hall signals.
Hall-effect position sensing is built into our BLDC motor customization work, engineered into the winding and housing design, with torque, speed, voltage, and power configured around your load requirements.
Shaft geometry, housing dimensions, and mounting details are adjusted case by case, with quiet operation, long life cycles, and environmental temperature resistance addressed at the design stage.
Housing and gear materials are selected to match load and environment: brass, stainless steel, powder-metallurgy alloys, and engineering plastics are all available, standalone or paired with a gearbox.
We integrate encoder modules, PCB soldering, and harness assembly, and pair the motor with a planetary gear motor or worm gear motor stage.
Hall feedback gives the controller a known starting position, so the first move is correct in robotics motor applications where startup consistency is a spec requirement.
Machines that start and stop frequently benefit from commutation that does not depend on the rotor already spinning, since sensorless back-EMF sensing is unreliable at restarts.
A hesitant or jerky startup is not acceptable in patient-facing equipment; Hall feedback guarantees smooth starts without full encoder resolution, as in motors for medical equipment development.
Simple, low-wire-count commutation is preferable to a full encoder, and we pair Hall-sensor BLDC motors with coreless brushless options where low inertia and reliable startup torque matter.
SLW Motor is ISO 9001:2015 certified, with RoHS compliance documented for materials and components, and we operate our own factory in Shenzhen with more than 15 years of manufacturing and R&D experience. Every Hall sensor BLDC motor build goes through incoming inspection, in-process testing, and final verification, the same process control we apply across our full BLDC motor line.
Send us your requirements and we'll confirm which frame size, winding, and sensor configuration fits your application.
Tell us your supply voltage or acceptable range so we can match the winding to your system.
Share target operating torque and RPM at your load point, plus any startup torque requirement.
Give us the maximum diameter and length your assembly can accommodate.
Specify open-collector with your pull-up resistor spec, or push-pull, matched to your driver board.
Include shaft diameter and length, flange or bracket mounting, and any gearbox pairing needed.
Let us know whether you need bare leads, a specific connector housing, or a fully pre-terminated harness.
Describe your operating temperature range, duty cycle, and any noise or life-cycle requirements.
With flexible sample customization through OEM/ODM engagements from prototype units through stable bulk delivery, Contact SLW Motor to start that conversation.
Answers on Hall sensor function, placement, output types, and ordering a sensored brushless motor.
Tell us your project or application requirements, and our team will get back to you with technical support, product recommendations, or a customized motor solution.
