Martin Introduces Brushless Precast Concrete Vibrator

Martin Engineering introduces a portable brushless precast concrete vibrator.

The company worked closely with customers to design the MHF-1500 brushless concrete form vibrator. Precast concrete contractors and manufacturers requested a versatile, longer lasting vibrator. Observing the needs of the modern precast industry, along with months of designing and testing, resulted in a powerful vibrator that is simple to service in-house and portable with a longer equipment life.

“Traditionally, this type of motor is universal AC with internal brushes like a DC brushed motor,” explained Travis Miller, global engineering manager of flow aids at Martin Engineering. “Those create heat if used on any high-duty cycle application that drives them to failure. By going AC to AC, we can eliminate the brushes and reduce the heat build-up.”

Brushless Vibration Technology

The external VFD/inverter converts the single-phase 110-120V 60Hz power to three-phase 230V, 100Hz power in the electric rotary motor which runs at 6,000 rpm producing 1,500 pounds of force. This allows for a brushless environment where magnetic fields rotate in space for the rotor to follow, lowering heat output that reduces wear and tear on internal components and extends the motor’s operating life.

The whole unit is sealed in a totally enclosed, non-ventilated (TENV) aluminum housing rated International Protection Marking (IP) 66 and National Electrical Manufacturers Association (NEMA) 4 with seals that comply with North American and EU standards. Durable O-rings between the end caps and the housing retain the tight seal, even during pressure washing.

The casing can be opened for easy maintenance in-house. By removing the weight covers, operators can adjust the vibratory unbalance to the required force needed for the application. Each MHF-1500 features oversized and permanently lubricated roller bearings contained in sealed ductile iron housings, adding to the long life of the unit.

Martin Engineering, Neponset, IL 309-852-2384 www.martin-eng.com