Groschopp Introduces An Updated Brushless DC Motor

Groschopp Inc. introduces an updated Brushless DC (BLDC) motor and several gearmotor combinations. Due to the lack of wear components, the BLDC motor is considered to be a maintenance-free, high reliability motor with a life of 20,000 hours or more. Typically only the bearings will limit a brushless motor’s life. With an outside square dimension of 73.3 mm (2.88 in) to 90.2 mm (3.55 in) the brushless motor is available in two sizes and a variety of voltages, 12, 24 and 163VDC/115VAC, offering broad torque and speed ranges.

Characteristics:

• Variable speed or torque operation
• High efficiency between 65% – 85%
• High starting torque
• 20,000+ hours life
• No maintenance
• High power density
• Totally enclosed, non-ventilated
• Continuous rated speeds 2,600 to 3,800 rpm
• Continuous rated torque of 1.8 to 10.8 in-lb

Groschopp catalog combinations include: right angle worm, planetary, parallel shaft, and right angle planetary reducers. The gearmotor combinations are tested and optimized using a custom interface designed to ensure the motors and gearboxes function flawlessly as one unit. The interface eliminates the need to purchase a motor and gearbox separately, eliminating design and assembly time.

Similar in performance to a Permanent Magnet brush-type motor, the speed of a brushless DC motor is proportional to the voltage supplied and the torque is proportional to the current supplied, but a BLDC motor does not require brush replacement of a typical PMDC motor. Compared to AC Induction motors, BLDC motors possess a higher starting/stall torque and more horsepower in a comparable frame size. Generally, a smaller motor can be specified due to high efficiencies and the increased power density of the BLDC motor, allowing a robust motor to be integrated in a small area.

The BLDC motor is designed using standard 120° Hall Effect switches; a control is required for the BLDC motor to commutate. With the use of a proper control the motor can achieve highly customized performance characteristics. Optional feedback devices are available including incremental and absolute encoders.

Groschopp 
www.groschopp.com