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Brushless DC Gearmotors

Merkle-Korff offers our Brushless DC gearmotors with either hall only feedback or a fully integrated control board, internal to the motor. The integral control is a fully digital control with the latest in micro-processor technology on board. The motor can be mounted not only to our most robust parallel shaft gear box that we manufacture (MK’s GF gearbox) but it can also be fitted to our new line of 52 mm planetary gear heads.

Our domestically based engineering team has the expertise to customize the software to meet the various demands and requirements of virtually any application. Our brushless DC gearmotors are currently being utilized in virtually every market we serve, including the commercial food equipment, pellet stove, satellite dish and pump markets. For those applications that require a higher degree of controllability or a higher efficiency solution to meet your green initiatives, the Merkle-Korff Brushless DC product is the perfect solution.

 
Brushless DC gearmotors
Brushless DC Gearmotors (pdf)

Features

  • Internal controller
    • Two quadrant programmable control: current limiting, acceleration, speed regulation, velocity profiles
    • Built-in quadrature encoder
    • Over-current protection
    • Stall condition protection
    • 0 – 5 or 0 – 10 VDC speed reference voltage
    • Dynamic braking and holding capability
    • Input voltage polarity protection
    • Electronic commutation
  • Motor
    • Long life
    • Ball bearing construction
    • 8 pole rotor
    • 3 phase stage – wye connection
    • High energy/skewed magnets for reduced cogging
    • Integral hall sensors for rotor position
  • Gearbox
    • Sintered or needle bearings: output shaft
    • Sintered powder metal gearing
    • Helical first stage for low audible noise

Optional Features

  • Hall only output: externally controlled
  • Incremental optical encoder

Applications

  • Commercial food equipment
  • Pumps
  • Business equipment/automation
  • Pellet stove
  • Medical/laboratory
  • Satellite positioning systems
  • Custom solutions

Specifications

  • Input voltage: 12 to 32 Vdc
  • Insulation class: F (155° C)
  • Bi-directional
  • Speed regulation: open or closed loop, programmable
  • Velocity profile: programmable
  • Acceleration: programmable
  • Temperature protection: 90° C/110° C std
  • Current limit: programmable
  • Tachometer O/P: 2 Ch – 6PPR
  • Gearing peak torque: 250 lb. in
  • Speed range: 0.25 – 35 rpm

Standard gear reductions

  • 1131:1
  • 1044:1
  • 536:1
  • 495:1
  • 178:1
  • 165:1

Timing Diagram Sensor- Winding

Hall-effect sensors
CCW phrases
CW phrases

 

HA

HB

HC

A

B

C

A

B

C

1

1

0

1

+

-

0

-

+

0

2

1

0

0

0

-

+

0

+

-

3

1

1

0

-

0

+

+

0

-

4

0

1

0

-

+

0

+

-

0

5

0

1

1

0

+

-

0

-

+

6

0

0

1

+

0

-

-

0

+

External (hall only): lead wire color code

Board position

Designation

Lead color

1

motor A

blue

2

motor B

white

3

motor C

brown

4

hall A

green

5

hall B

orange

6

hall C

yellow

7

5UDC

red

8

GND

black

Internal controller: lead wire color code

Board position

Designation

Lead color

1

digital I/O "A"

gray

2

digital I/O "B"

white/red

3

direction

white/black

4

signal ground

green

5

enable input

orange

6

5VDC (output)

yellow

7

input power (12-32VDC)

red

8

power ground

black

9

analog Input 2

violet

10

analog input 1 (Speed)

blue

11

tach output "B"

brown

12

tach output "A"

white

Diagram

Brushless DC Gearmotors

Model
Output power (watts)
Peak torque (lb.in)
“A”

GF-5706B

12

150 LB.IN

3.020”

GF-5719B

25

200 LB.IN

3.520”

GF-5738B

45

250 LB.IN

4.270”

 

 

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