Someone runs a motor at between 75% and 100% of rated speed, but what happens if he overdrives by 150% by setting the variable frequency drive (VFD) at 90 Hz, rather than 60 Hz.? My knee-jerk react
Nord Drivesystems has released a variant of its Nordac SK500 family of frequency inverter drives incorporating sophisticated position control capabilities The P
Bodine Electric Company is expanding the INTEGRAmotor product line to include its larger brushless DC motors and gearmotors. The INTEGRAmotor gearmotors combine a speed control, a brushless DC motor and a gearhead in one compact unit. The new larger frame sizes can be operated from a regulated 24VDC power supply, and are available with either analog or digital (PWM -- pulse width modulation) interface options. These new models feature an on-board PWM control that accepts inputs from an external motion controller or Programmable Logic Controller (PLC). The control also features amplifier enable, direction input and dynamic braking. The type “FV” models are supplied with a built-in 256 PPR, , 2-channel optical encoder. Parallel shaft, right-angle and hollow shaft gearmotors are offered with output speeds ranging from 0.3 - 500 RPM, and rated torque of up to 310 lb-in. “Our experience with custom engineered control and gearmotor solutions helped us a great deal when we looked at integrating motor and control elements into one enclosure. For example, we already knew how to work within tight limits of power consumption and thermal performance. It also helps that we design and manufacture gearmotor, motor and control solutions in house,” says Mike Marhoefer, Manager of Brushless DC Technology and Control Development.