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77mm Frameless BLDC Motor

Specifications:
77 mm Frame Size
28 mm Stack Length
28 mm Rotor ID
2.08 Nm Rated Torque
48 VDC Rated Voltage

Features and Benefits:
High torque to weight ratio
Compact & lightweight
Hall sensor and thermistor available

  • HOLRY

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Quantity:
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Product Description

77mm Frameless BLDC Motor Description

Explore the 77mm Frameless BLDC Motor by HOLRY, engineered for compact integration, smooth operation, and high precision. Widely used in automation, robotics, and motion control.


HOLRY 77mm Frameless BLDC Motor, large hollow split stator & rotor design with higher torque density, ultra-low cogging torque and zero-backlash direct drive. Custom stack length, 24/48V DC, Hall sensor and thermal thermistor optional. Widely used for humanoid robot joints, exoskeleton, medical instruments, optical gimbal and semiconductor rotary stage. Request datasheet & custom quote.


77mm Frameless BLDC Motor - HOLRY



Curves

68mm Frameless BLDC Motor Performance Curves

77mm Frameless BLDC Motor Performance Curves - HOLRY

Specifications

77mm Frameless BLDC Motor Specifications


Operating Specifications

Ambient Temp 25 ℃
Winding Temp 155°C
Winding adjustment 0
System Friction 0 N·m
Heat Sink 7.87" x 7.87" x 0.5"


Performance Specifications

Bus Voltage (Vbus) 48  VDC
Max Cont. Torque (Tcont) 2.203  Nm
Max Cont. Current (Icont) 15.75
Peak Torque (Tpk) 4.212  Nm
Peak Current (Ipk) 31.4 Arms
Rated Torque (Trtd) 2.095  Nm
Rated Power (Prtd) 670  W
Rated Speed (Nrtd) 23054  RPM


Electrical  Specifications

Rm at Tamb 0.12  Ω
LM 0.32 mH
Back EMF 14.1 Vpk / kRPM
Kt at Temp 0.14  N·m/Arms
Km 0.389  Nm/√W
Commutation sine
NL Comm Freq 284  Hz


Mechanical Specifications

Stack Length
 28 mm
Rotor ID 28 mm
Weight 0.842  kg
Poles 10




Dimensions

77mm Frameless BLDC Motor Dimensions

77mm Frameless BLDC Motor Dimensions - HOLRY

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