BLDC MotorTopband BL52 inner-rotor BLDC · Ø52 mm

BL5224

Name: BL5224
Brand: Topband Motor

325.3 W, 20 V Ø52 mm BLDC motor from Topband Motor: 0.15 N·m rated at 20709.45 rpm.

Manufacturer datasheet: Topband Motor · BL5224 ↗ (checked 2026-10-18)Maker profile & contacts →

Figures are copied from the maker’s published datasheet; curves are calculated from them. Confirm with the manufacturer before ordering. Not stated on the datasheet, estimated from it: torque constant (fitted to the rated point), resistance (fitted to the rated point), inductance, rotor inertia, weight, insulation class, IP rating.

Applications:Power Tools Home Appliances

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How this motor is made

Full manufacturing overview: 57 mm Inner-rotor BLDC Motor →

Ø52 mm frame; built with the same process as the 57 mm inner-rotor reference series.

Assembly steps: 11
Equipment types: 14
BOM lines: 13
PRD suppliers: 88

1. Lamination stamping & interlocking
2. Stator insulation
3. Winding
4. Terminal connection
5. Stator in-process test
6. Impregnation & curing
7. Rotor assembly
8. Magnetizing
9. Rotor balancing
10. Final assembly
11. End-of-line test

Export certification: Low-voltage motor without electronics

Rated power: 325 W
Rated torque: 0.15 N·m
Rated speed: 20,709 rpm
Rated efficiency: 79.7 %

Performance curves

Right axis:

SpeedEfficiency (right axis)

Calculated with the linear DC-motor model (constant 20 V supply, ignoring resistance rise with temperature).

Full specifications

General

Motor type: BLDC Motor
Series: Topband BL52 inner-rotor BLDC
Frame / flange: Ø52 mm

Rated Values

Rated voltage: 20 V
Rated power: 325 W
Rated torque: 0.15 N·m
Rated speed: 20,709 rpm
Rated current: 20.4 A

Performance

Stall torque: 3.55 N·m
No-load speed: 21,624 rpm
Rated efficiency: 79.7 %
Peak efficiency: 82.8 %

Electrical

Torque constant Kt: 0.00876 N·m/A
Back-EMF constant Ke: 0.917 V/krpm
Resistance: 0.049 Ω
Inductance: 0.0735 mH
No-load current: 3.29 A
Stall current: 408 A
Electrical time constant: 1.5 ms
Mechanical time constant: 1.72 ms

Mechanical

Rotor inertia: 27 g·cm²
Body length: 24 mm
Shaft diameter: 9 mm
Weight: 0.24 kg
Power density: 1,355 W/kg
Insulation class: B
Protection: IP40

Compatible drivers

All drivers →

Drivers whose supply voltage covers this motor and whose continuous current is at least its rated current; drivers from the same maker first. Confirm Hall/encoder type and settings with the maker.

Model	Maker	Motor type	Supply	Cont. / peak current	Feedback
NU-BL5020-01	Nuelectronics	BLDC	18–50 V DC	20 A / 25 A	Hall sensors, Sensorless, Open loop, Closed loop
NU-BL5020-02	Nuelectronics	BLDC, Servo	18–50 V DC	20 A	Hall sensors, Incremental encoder
DCPC-09030-OPE	ZP Motors	BLDC, Servo	18–90 V DC	21 A / 42 A	Hall sensors, Incremental encoder
ZM-BL24Z30S	Zeming	BLDC	18–32 V DC	30 A	Hall sensors, Sensorless
DBL-30RS	Mayi Motor	BLDC	18–60 V DC	30 A	Hall sensors
BD30L□□2□	Stonker Motor	BLDC	12–60 V DC	30 A	Sensorless