BLDC Motor for Automated Warehouse & Logistics Sorting Systems: Complete Selection Guide
Automated warehouses now process millions of packages per day, driven by brushless DC motors in every moving subsystem: sorting conveyors, cross-belt sorters, AGV drive wheels, AMR locomotion units, shuttle rack carriers, and divert arms. Selecting the wrong motor — undersized torque, wrong IP rating, insufficient encoder resolution — means unplanned downtime in a system where 15 minutes of stoppage can cost tens of thousands of dollars in delayed shipments. This guide provides the engineering specifications, sizing formulas, and selection criteria for BLDC motors across every major warehouse automation subsystem, drawn from 盛合智联电机’s direct supply experience with Chinese third-party logistics integrators and OEM equipment builders.
Author: 盛合智联电机 Engineering Team · Published 2026-09-04 · Reviewed by Warehouse Automation Applications Engineer
- Why BLDC motors dominate warehouse automation
- Motor sizing for sorting conveyor systems
- Cross-belt sorter and divert mechanism motors
- AGV drive motor requirements and selection
- AMR locomotion motor specifications
- Speed-torque curves and duty cycle for warehouse applications
- IP ratings and environmental requirements for warehouse motors
- Encoder types and communication protocols
- Shenghe warehouse automation motor solutions
- Frequently asked questions
1. Why BLDC Motors Dominate Warehouse Automation
The shift from brushed DC and AC induction motors to brushless DC (BLDC) motors in warehouse automation is not a trend — it is a completed transition in every tier-one warehouse OEM’s product line. The driving factors are quantifiable:
1.1 Continuous duty cycle at full load
A modern e-commerce fulfillment center runs its sorting conveyors 20–22 hours per day, 360+ days per year. Brushed DC motors degrade under this duty: carbon brush life in a conveyor drive motor at 3,000 RPM is typically 3,000–5,000 hours (4–7 months continuous). A BLDC motor has no brushes to wear; rated bearing life at L10 is 20,000–30,000 hours (2.3–3.4 years) for a standard ABEC-3 bearing. Eliminating a brush change every 5–6 months across hundreds of conveyor drive motors translates to hundreds of maintenance labor hours saved annually.
1.2 Energy efficiency at partial loads
Warehouse conveyor motors run at partial loads most of the time — full-speed throughput occurs only during peak hours. AC induction motors are inefficient below 50% load (efficiency drops from 92% at full load to 75–80% at 25% load). BLDC motors maintain 85–90% efficiency from 25% to 100% load, because rotor losses are near-zero (permanent magnet rotor, no induced currents). For a 500-motor warehouse installation each consuming an average of 100W, the efficiency difference equals approximately 15,000 kWh saved per month — a meaningful operating cost reduction.
1.3 Precise speed and position control
Cross-belt sorters require each trolley belt to accelerate, deliver a package, and decelerate within a tightly controlled window measured in milliseconds. Shuttle rack systems must position a carrier to within ±1 mm over a 50-metre run. These requirements demand closed-loop servo control that BLDC motors with encoder feedback deliver natively. AC induction motors require a variable-frequency drive (VFD) for speed control but cannot deliver true torque control or high-bandwidth position control without major additional complexity.
For a broader comparison of BLDC versus alternative motor technologies, see our brushless DC vs brushed motor comparison and our BLDC motor speed control methods guide.
2. Motor Sizing for Sorting Conveyor Systems
Sorting conveyors are the backbone of every logistics facility — flat belt conveyors, roller conveyors, incline conveyors, and accumulation conveyors each impose different motor requirements. Getting motor sizing wrong is the most common cause of premature motor failure in warehouse installations.
2.1 Required power calculation
The fundamental power formula for a conveyor drive motor:
P_required = (F_total × v_belt) / η_gearboxF_total = F_belt_tension + F_load + F_gradeF_belt_tension = C_f × m_belt × g (belt friction, typically C_f = 0.02–0.05)F_load = m_package × g × μ (rolling/sliding resistance, μ = 0.02–0.04 for roller beds)F_grade = m_total × g × sin(θ) (incline component, 0 for flat conveyors)
Then apply a service factor (S_f) for start-stop cycles and jam loads:
P_motor_rated = P_required × S_fS_f = 1.25 (light duty, <5 starts/hour)S_f = 1.5 (moderate duty, 5–20 starts/hour, typical accumulation conveyor)S_f = 2.0 (heavy duty, >20 starts/hour or jam-prone chute discharge)
2.2 Motor sizing by conveyor type
| Conveyor Type | Typical Belt Speed | Max Package Mass | Motor Power per Zone | Output Speed (at roller) | Recommended Gear Ratio |
|---|---|---|---|---|---|
| Flat belt (light parcel) | 0.5–1.5 m/s | 10 kg | 100–200 W | 60–120 RPM | 25:1–50:1 |
| Flat belt (heavy goods) | 0.3–1.0 m/s | 50 kg | 300–750 W | 30–80 RPM | 40:1–80:1 |
| Roller conveyor (accumulation) | 0.3–0.8 m/s | 30 kg | 150–400 W | 40–100 RPM | 30:1–60:1 |
| Incline belt (15° grade) | 0.5–1.2 m/s | 20 kg | 400–900 W | 50–120 RPM | 25:1–50:1 |
| High-speed merge/induction | 2.0–3.0 m/s | 15 kg | 200–500 W | 200–350 RPM | 10:1–20:1 |
2.3 Roller motor (drum motor) configuration
For zero-pressure accumulation (ZPA) conveyor zones, integrators increasingly use motorised rollers — a BLDC motor integrated inside the roller tube with a planetary gearbox. Each zone roller is individually driven, allowing the PLC to stop a zone independently when a package is present (preventing back-pressure jams). The motor power in these configurations is lower per zone (24–72 VDC, 30–100 W per roller), but the motor count is much higher. Key specification differences from external drive motors:
- Operating voltage: 24 VDC or 48 VDC (safety extra-low voltage, important for operator safety)
- Diameter constraint: motor OD must fit inside standard roller tube (50 mm or 60 mm ID)
- Integrated gearbox: typically 5:1 to 15:1 planetary, fixed ratio
- Communication: most modern systems use IO-Link or proprietary serial bus, not analog 0–10V
- Thermal: motor is enclosed inside the roller; thermal management is critical; winding class H (180°C) preferred
3. Cross-Belt Sorter and Divert Mechanism Motors
Cross-belt sorters are the highest-throughput sorting technology in large parcel distribution centers, capable of 15,000–25,000 sorts per hour. Each trolley in a cross-belt sorter carries a small individual conveyor belt oriented perpendicular to the main loop direction. When the trolley reaches the correct chute, the belt motor activates, ejecting the package laterally onto a discharge chute in under 200 milliseconds.
3.1 Trolley belt motor requirements
The trolley belt motor is the most demanding motor specification in a sorting system:
| Parameter | Specification | Engineering Reason |
|---|---|---|
| Power | 100–200 W (per trolley) | Must accelerate package from 0 to 1.5 m/s in <150 ms |
| Peak torque | 3× rated continuous torque | High acceleration impulse; motor must sustain peak >2 s without derating |
| Speed accuracy | ±2% at target speed | Discharge velocity controls landing accuracy on chute — too slow = short-shot, too fast = bounce |
| Duty cycle | S3, 40% (on 0.3 s, off 0.45 s per sort) | Not continuous; thermal model critical to avoid winding temperature exceedance |
| Voltage bus | 48 VDC (sliding contact or wireless power) | Trolleys receive power from a rail; 48V minimises rail current and contact resistance losses |
| Encoder | Hall sensors (3-wire) minimum; 500 PPR incremental preferred | Belt speed feedback for closed-loop velocity control during ejection |
| Weight | <1.2 kg (motor + gearbox) | Trolley mass budget; each additional kg reduces sorter loop speed or increases drive chain tension |
| IP rating | IP54 minimum | Dust and incidental water from package condensation, cleaning |
3.2 Divert arm and push-diverter motors
For lower-throughput systems (3,000–8,000 packages/hour), linear push diverters or pivoting divert arms are more cost-effective than cross-belt sorters. These use BLDC motors in a linear actuator or rotary actuator configuration:
- Linear push diverter: 200–500 W BLDC motor with a rack-and-pinion or lead screw drive. Travel distance 200–400 mm, cycle time 300–500 ms, peak force 200–800 N depending on package mass and speed.
- Pivoting arm diverter: 100–300 W BLDC gear motor with a 90° rotation actuator. Swing time 150–300 ms, torque at arm pivot 10–50 Nm depending on arm length and package impact.
- Both configurations benefit from absolute encoders (single-turn) to confirm divert arm position without homing on each restart.
4. AGV Drive Motor Requirements and Selection
Automated Guided Vehicles (AGVs) in logistics facilities range from simple unit-load carriers following magnetic tape to sophisticated laser-navigated pallet movers. Despite this range, their drive motor requirements share common characteristics.
4.1 AGV drive system topology
Most warehouse AGVs use one of two drive configurations:
- Differential drive (two independently driven wheels): Steering is achieved by running the two drive wheels at different speeds. Requires matched motor pairs with identical speed-torque characteristics. Each wheel motor is independently controlled by its own controller. This is the most common configuration for AGVs under 1,000 kg payload.
- Four-wheel drive with steered front axle: All four wheels are driven, with the front axle steering angle controlled by a separate servo. Preferred for high-payload AGVs (1,000–5,000 kg) on uneven warehouse floors. Requires higher individual motor torque (typically 500–1,500 W per wheel).
4.2 AGV drive motor specification table
| AGV Class | Max Payload | Travel Speed | Motor Power (per wheel) | Gear Ratio | Peak Torque (output) | Duty Cycle |
|---|---|---|---|---|---|---|
| Light load (tote mover) | 50 kg | 1.5 m/s | 100–200 W | 20:1–40:1 | 15–30 Nm | S3, 60% |
| Unit load carrier | 300 kg | 1.2 m/s | 200–400 W | 30:1–60:1 | 40–80 Nm | S3, 60% |
| Pallet AGV | 1,000 kg | 1.0 m/s | 500–1,000 W | 40:1–80:1 | 150–300 Nm | S4, 40% |
| Heavy pallet mover | 3,000 kg | 0.8 m/s | 1,000–1,500 W | 60:1–100:1 | 300–600 Nm | S4, 30% |
4.3 AGV-specific motor features
Beyond the power and torque numbers, AGV drive motors must satisfy several requirements that standard industrial motors do not:
- Integrated holding brake: A spring-applied electromagnetic brake (24 VDC release) holds the AGV stationary on ramps and during power loss. Brake must hold 150% of peak motor torque without slip. Brake release time must be <50 ms to allow fast restarts.
- Temperature monitoring: NTC thermistor in winding, output to controller for thermal derating. Essential because AGV motors run in confined chassis with limited airflow.
- Vibration resistance: Warehouse floors have expansion joints, threshold plates, and dock leveller gaps. Motor and gearbox must withstand 5G shock (IEC 60068-2-27) and 1G continuous vibration (IEC 60068-2-6, 10–150 Hz).
- Compact envelope: AGV chassis space is constrained. Planetary gearboxes are preferred over worm or helical spur gearboxes because they deliver the highest torque density per unit volume.
- Regenerative braking compatibility: When the AGV decelerates, the drive motor operates as a generator. The controller must support energy recovery back to the battery pack. This requires a four-quadrant controller — not all BLDC controllers support this.
5. AMR Locomotion Motor Specifications
Autonomous Mobile Robots (AMRs) differ from AGVs in their navigation method — AMRs use LiDAR, vision, and SLAM algorithms to navigate freely without fixed infrastructure — but this navigation freedom translates directly into more demanding motor requirements. AMRs re-route constantly, make frequent direction changes, and must respond to dynamic obstacles. All of this places higher demands on motor dynamic response, encoder resolution, and controller bandwidth.
5.1 Key AMR motor performance differences from AGV
| Parameter | AGV Motor Requirement | AMR Motor Requirement | Reason for Difference |
|---|---|---|---|
| Speed response bandwidth | 5–10 Hz closed-loop | 50–100 Hz closed-loop | AMR obstacle avoidance requires instantaneous speed correction |
| Encoder resolution | 500 PPR minimum | 1,000–4,096 PPR | Odometry accuracy for SLAM map-building; low resolution = position drift |
| Peak/continuous torque ratio | 2:1 | 3:1 to 4:1 | Emergency stops and obstacle collision require higher peak torque |
| Reversing cycles per hour | 20–50 | 100–500+ | AMRs frequently reverse for collision avoidance; high inertia mismatch wears gearbox |
| Control algorithm | V/f open loop or simple PID | FOC with current-loop bandwidth >1 kHz | FOC is necessary for torque control precision in omnidirectional AMRs |
| Communication latency | <10 ms acceptable | <2 ms required | Fleet management system sends re-routing commands that must execute immediately |
5.2 Torque calculation for AMR drive motors
AMR drive torque must account for three simultaneous demands:
T_rolling = μ_r × m_total × g × r_wheel / (i × η)T_accel = (m_total × a × r_wheel) / (i × η)T_grade = (m_total × g × sin(θ) × r_wheel) / (i × η)T_peak = (T_rolling + T_accel + T_grade) × S_fTypical values:μ_r = 0.015 (PU wheels on sealed concrete)a = 0.5–1.0 m/s² (AMR acceleration target)θ = 3–5° (dock leveller ramp, worst case)S_f = 1.5–2.0
For a 200 kg loaded AMR with 150 mm diameter drive wheels, 20:1 gear ratio, target acceleration 0.8 m/s², and 3° maximum ramp: T_peak at the motor shaft ≈ 2.8 Nm, requiring a 300–500 W motor with 4 Nm rated torque and 10+ Nm peak torque capability. Most integrators select a 400 W motor with a 3:1 intermittent overload rating to provide comfortable margin.
6. Speed-Torque Curves and Duty Cycle for Warehouse Applications
Understanding the BLDC motor speed-torque relationship — and matching it to the actual duty profile of the application — prevents both underperformance (stall, overheating) and over-specification (paying for capacity that never gets used).
6.1 BLDC motor speed-torque characteristics
Unlike AC induction motors, BLDC motor speed-torque curves are nearly linear and controlled electronically:
- Constant torque region (0 to base speed): Motor delivers rated torque at any speed up to the base speed (typically 3,000 RPM for 24V/48V systems). Current is limited by the controller to rated value. This is the normal operating region for conveyor and AGV motors.
- Constant power region (base speed to maximum speed): Above base speed, the controller reduces current as back-EMF rises, reducing torque. Speed increase is traded for torque reduction. This region is used for high-speed empty return cycles in shuttle systems.
- Peak torque capability: For 2–30 seconds, most BLDC motors tolerate 2–4× rated current, delivering 2–4× rated torque. This supports acceleration and jam-clearing without motor damage, provided the thermal model confirms the winding temperature stays within class limits.
6.2 IEC duty cycles relevant to warehouse motors
| IEC Duty Class | Description | Typical Warehouse Application | Motor Sizing Note |
|---|---|---|---|
| S1 (continuous) | Continuous operation at constant load | Main conveyor belt drives, constant-speed merge belts | Size to rated continuous torque; thermal steady-state matters most |
| S3 (intermittent periodic) | Fixed on/off cycle; no rest long enough for full cool-down | Accumulation conveyor zones (on when package present), ZPA rollers | Derate motor by on-time fraction: S3 40% motor ≈ 63% of S1 rated power |
| S4 (intermittent periodic with starting) | Like S3 but includes motor start transient | AGV drive motors (frequent start/stop), divert arms | Peak current at start must not exceed controller peak current rating |
| S5 (intermittent with electric braking) | S4 plus rapid braking each cycle | Cross-belt sorter trolley motors, shuttle rack end-stops | Braking energy must be dissipated or regenerated; check controller braking resistor sizing |
6.3 RMS torque method for intermittent loads
For applications with varying load profiles (sorter trolleys, shuttle carriers), use the RMS torque method to find the thermally equivalent continuous torque for motor sizing:
T_rms = √[(T1² × t1 + T2² × t2 + T3² × t3) / (t1 + t2 + t3 + t_rest)]Example (sorter trolley):t1 = 0.15s at T1 = 3.0 Nm (acceleration)t2 = 0.10s at T2 = 1.2 Nm (constant speed ejection)t3 = 0.05s at T3 = 2.0 Nm (braking)t_rest = 0.45s (trolley travelling between sorts)T_rms = √[(9.0×0.15 + 1.44×0.10 + 4.0×0.05) / 0.75]T_rms = √[1.744] = 1.32 NmSelect motor with T_rated ≥ 1.32 Nm (with 20% safety margin: 1.6 Nm)
7. IP Ratings and Environmental Requirements for Warehouse Motors
Warehouse environments are not benign. Even a clean, climate-controlled e-commerce fulfillment center exposes motors to dust from cardboard boxes, cleaning spray from weekly washing cycles, condensation during cold mornings, and vibration from forklift traffic. Selecting the wrong IP rating is the most common cause of premature motor failure outside of pure mechanical overload.
7.1 IP rating selection by warehouse zone
| Warehouse Zone | Environmental Hazards | Minimum IP Rating | Recommended IP Rating |
|---|---|---|---|
| Ambient fulfillment (parcel sorting) | Cardboard dust, light spray from cleaning | IP54 | IP54 |
| Cold storage (−20°C to +5°C) | Condensation (heavy), forklift exhaust, humidity swings | IP65 | IP65 + conformal coating on windings |
| Refrigerated loading dock | Rain ingress from open dock doors, hose-down cleaning | IP65 | IP66 |
| Outdoor cross-dock / yard AGV | Rain, sun UV, road grime, temperature cycling −20 to +50°C | IP66 | IP67 + UV-resistant cable jacketing |
| Food & beverage DC (washdown) | High-pressure hot water wash (80°C, 100 bar) | IP69K | IP69K + stainless steel housing |
| Pharmaceutical / cleanroom sortation | Positive pressure HEPA air, no particles allowed out of motor | IP54 (sealed housing) | IP65 + sealed bearing exhaust port vented outside cleanroom |
7.2 Cold storage motor considerations
Cold storage warehouses present unique motor challenges beyond IP rating. At −20°C:
- Lubricant viscosity: Standard grease in bearings and gearboxes becomes stiff at sub-zero temperatures, dramatically increasing drag torque. Cold-rated lubricants (NLG1 Grade 0 or 00, wide-temperature mineral or synthetic base) must be specified. A gearbox filled with standard NLGI-2 grease at −20°C can increase starting torque by 200–400%, causing motor stall or controller overcurrent fault on startup.
- Seal material: Standard NBR (nitrile) rubber seals become brittle at −20°C. Specify FKM (Viton) or silicone seals for cold storage applications.
- Condensation on windings: When a cold motor is energised in a warm room (or warm air flows across a cold motor at a dock opening), water condenses on windings. Conformal coating (IEC 60068-2-67 test) is essential. Without it, condensate bridging between winding conductors causes winding shorts within months.
- Thermal startup procedure: Many cold-storage AGV systems run the motors at 20% power for 2–3 minutes on startup to warm lubricants before applying full load.
8. Encoder Types and Communication Protocols
Warehouse automation systems connect dozens to thousands of motor controllers to PLCs, WMS software, and fleet management platforms. The communication architecture — both the encoder type for local motor feedback and the network protocol for system-level control — must be specified alongside the motor itself.
8.1 Encoder selection for warehouse motors
| Encoder Type | Resolution | Output Signal | Best For | Limitation |
|---|---|---|---|---|
| 3-wire Hall sensor | 6 steps/rev (electrical) | Digital 5V | Simple conveyor drives, cost-sensitive AGVs | Coarse; insufficient for precise odometry or FOC current control |
| Incremental encoder (500–1,024 PPR) |
500–4,096 counts/rev (with quadrature) | A/B/Z differential RS422 | AGV odometry, conveyor speed control, sorter trolleys | Loses position on power loss; needs homing cycle |
| Incremental encoder (2,048–4,096 PPR) |
8,192–16,384 counts/rev (quadrature) | A/B/Z differential RS422 | AMR high-accuracy odometry, shuttle rack positioning | Higher cost; higher cable pair count |
| Single-turn absolute encoder | 12–16 bit (4,096–65,536 positions/rev) | SSI, BiSS-C, or serial | Divert arms, pick stations requiring absolute position without homing | Higher cost; requires compatible controller interface |
| Multi-turn absolute encoder | 12-bit single-turn + 12-bit turns counter | SSI, BiSS-C, EtherCAT | Shuttle rack systems, stacker cranes where position must survive power loss | Highest cost; typically requires battery backup |
8.2 Communication protocols for warehouse motor systems
The motor controller’s communication protocol determines how the PLC or fleet management system commands speed, reads position, and monitors faults. Dominant protocols in current Chinese and international warehouse projects:
- RS485 Modbus RTU: Most common in cost-sensitive conveyor systems. Supports up to 247 nodes at 115,200 baud. Cycle time ≈ 5–20 ms for a 32-node system. Adequate for conveyor speed setpoint and fault reporting; too slow for high-bandwidth AGV torque control.
- CANopen: Standard in European AGV and material handling equipment. Cycle time 1–5 ms, supports 127 nodes. Well-suited for AGV multi-axis drive coordination. Widely used in 1,000–3,000 kg pallet AGVs.
- EtherCAT: Real-time Ethernet, cycle time <1 ms, supports hundreds of nodes. Preferred for AMR fleets requiring high-bandwidth torque control feedback and for cross-belt sorter trolley systems with millisecond synchronisation requirements. Increasing adoption in Chinese-made AGV/AMR controllers (2024–2026).
- IO-Link: Point-to-point protocol for individual smart sensors and motorised rollers. Widely used in zero-pressure accumulation conveyor zones. Not a network in the traditional sense — each IO-Link device connects to a master port on a PLC IO module.
- Proprietary wireless (AGV/AMR fleet management): Fleet management commands (route assignment, speed limit zones) travel over Wi-Fi 6 (802.11ax) or 5G. The local drive controller still uses wired encoder feedback; only high-level commands are wireless. Wireless must never be used for real-time position feedback or emergency stop signalling.
For detailed guidance on connecting BLDC motor controllers to industrial networks, see our BLDC motor speed control methods comparison.
9. Shenghe Warehouse Automation Motor Solutions
盛合智联电机 supplies BLDC gear motor systems to logistics integrators, AGV/AMR OEMs, and warehouse equipment builders from our Cixi, Ningbo factory. Our warehouse automation product line is configured specifically for the duty profiles, environmental ratings, and communication requirements described in this guide.
| Product Series | Power Range | Output Torque | IP Rating | Communication | Key Application |
|---|---|---|---|---|---|
| WH-C Series (Conveyor Drive) |
100–750 W | 15–200 Nm | IP54 | RS485 Modbus RTU, analog 0–10V | Flat belt and roller conveyor zone drives, merge/induction belts |
| WH-S Series (Sorter Trolley) |
100–200 W | 5–20 Nm | IP54 | CANopen, 48 VDC bus | Cross-belt sorter trolley belts, divert arm actuators |
| WH-A Series (AGV Drive) |
200–1,500 W | 40–600 Nm | IP54 / IP65 | CANopen, RS485, integrated brake | Unit-load AGV and pallet AGV differential drive wheels |
| WH-R Series (AMR Drive) |
150–500 W | 10–80 Nm | IP54 | EtherCAT, CANopen; 2,048 PPR differential encoder | AMR differential drive, omnidirectional wheel actuator |
| WH-F Series (Cold Storage) |
100–750 W | 15–200 Nm | IP65 | RS485 Modbus RTU, CANopen | Refrigerated DC conveyor and AGV drives (−25°C rated) |
All warehouse series motors include:
- ISO 9001 quality management; CE marked; RoHS 3 compliant
- NTC thermistor winding temperature output (standard)
- Hardened planetary gearbox, IEC Class II shock rating (3× rated output torque)
- Winding class F (155°C) standard; class H (180°C) available
- Sample motor + controller kits ship in 7–10 days; production runs 2–3 weeks
- OEM labelling, custom shaft dimensions, flange modifications on request
View our full product lines: BLDC Gear Motor Catalog | BLDC Motor Catalog | Motor Controller Hub
10. Frequently Asked Questions
What power rating do I need for a sorting conveyor motor?
For a parcel sorting conveyor carrying up to 30 kg packages at 1.5 m/s, a 200–400 W BLDC gear motor per drive zone is typical. Use P = (F_total × v) / η with a 1.5× service factor for accumulation conveyors. High-speed merge belts at 2.5 m/s may need 400–600 W per zone. Cross-belt sorter trolley motors are typically 100–150 W with a 3:1 peak overload capability.
What IP rating should a warehouse BLDC motor have?
IP54 is the minimum for ambient fulfillment centers. Cold storage and refrigerated warehouses require IP65 plus FKM seals and wide-temperature synthetic lubricant (−25°C rated). Outdoor cross-dock environments need IP66 or IP67. Food and beverage distribution centers with hose-down cleaning require IP69K with stainless steel housings.
What is the difference between an AGV motor and an AMR motor?
AGV motors handle steady-state travel on fixed paths: moderate torque, simple speed control (V/f or basic PID), 500 PPR encoders. AMR motors require higher dynamic response: 50–100 Hz closed-loop bandwidth, 1,000–4,096 PPR encoders for SLAM odometry, peak-to-continuous torque ratio of 3:1 to 4:1, and FOC current-loop control. AMRs also reverse more frequently (>100 times/hour), requiring gearbox shock ratings of 3× rated output torque.
How do I calculate torque for an AMR drive motor?
Sum three torque components: rolling resistance (T = μ_r × m × g × r / (i × η)), acceleration (T = m × a × r / (i × η)), and grade (T = m × g × sin(θ) × r / (i × η)). Apply a 1.5–2.0 service factor. For a 200 kg AMR with 150 mm wheels, 20:1 gear ratio, 0.8 m/s² acceleration, and 3° ramp, peak motor torque is approximately 2.8 Nm; a 300–400 W motor with 4 Nm rated torque provides adequate margin.
Can one BLDC motor controller run multiple conveyor zones?
Only if all zones run at the same speed with no individual stop/start control. For zero-pressure accumulation (ZPA) conveyors where each zone stops independently, each zone needs its own controller. Modern RS485 Modbus or CANopen systems can address up to 127 controllers on a single cable run from the PLC, making multi-zone control practical without individual cable runs back to a central cabinet.
Get Your Warehouse Motor System Specified
Share your application details: conveyor type or robot class, payload, travel speed, duty cycle, IP rating requirement, operating temperature range, encoder type needed, and communication protocol. We will recommend the optimal motor series, gearbox ratio, controller, and encoder combination — with measured torque-speed data from our factory test bench.
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