This frame size 57mm bldc motor a built-in drive controller board so it is easily used without an extra driver/controller.
Specifications:
Part Number: 57HBL75-IE
Rated Voltage: 24VDC
No-load Speed: 4000RPM
Rated Torque: 0.145Nm
Rated Speed: 3000RPM
Rated Current: 2.5A
Rated Power: 45W
Motor Length: 75mm
Shaft Diameter: Φ8mm
Shaft Length: 25mm