87results about How to "Reduce motor speed" patented technology

A power driven tool useful for tightening and loosening a mechanical fastener includes an impact mechanism. Preferably, the tool is pneumatic and includes a ratchet head and an impact device for providing additional torque to the ratchet head. A planetary reduction gear reduces the high output speed of a pneumatic motor for input into the impact device and reduces wear on the impact device.

An energy-reducing method and apparatus for retrofitting a constant volume HVAC system, with or without an economizer, that provides heating, cooling, and ventilation to occupants within a building space. The present invention includes the introduction of a programmable logic controller and variable frequency drive (VFD) that takes control of the existing fan, heating, cooling, and optional economizer operation. The controller is programmed for the reduction of fan speed in the heating and cooling modes. The reduction of the fan speed in the ventilation mode when the 100% operation is not needed saves significant energy of the existing constant volume HVAC system where the fan motor is designed to run 100% of the time. The fan speed may be further reduced upon a reduction in sensed occupancy levels of the space, such as with a CO2 sensor. Additionally, the fan speed may be reduced in the heating and / or cooling mode to further reduce energy consumption. The controller may also be programmed and equipped with sensors to allow simultaneous mechanical compressor cooling and economizer free cooling operation, for the operation of the economizer in response to the monitoring of outside air and return air to determine the preferred source for cooling operations, to keep the outside air damper closed during the unoccupied heating modes such as morning warm-up, and / or to provide fault detection. The retrofit method and apparatus may be employed in a stand-alone or networked version.

A method of operating an oil well comprises applying through a regenerative variable frequency drive AC electrical energy from a power grid to an AC electric motor to operate a drive mechanism of an oil well pump. The motor speed is regulated in a manner to optimize fluid production and maximize the operational life of the drive mechanism, decreasing motor speed by transferring the electrical energy to the power grid and increasing motor speed by transferring the electrical energy from the power grid to the motor. The drive mechanism has a predetermined stroke cycle and, over the course of each stroke cycle, the motor is operated at different regulated speeds initiated when the drive mechanism is at a predetermined position.

A dehider includes a pneumatic motor driving a pair of disk blades in opposed cutting oscillations and a governor that controls the speed of the motor. Governor balls, acting as centrifugal weights, spin with the motor and push against an inclined flange on a valve head to move the valve head towards a valve seat. The motion of the valve head compresses a biasing spring and restricts the flow of pressurized air as the desired speed is exceeded. As speed decreases, centrifugal force decreases and the biasing spring opens the valve to provide additional power to the motor. The disk blades are provided with a cylindrical central lip that substantially increases the area of the central bearing that the blades turn on and produces significantly longer blade life.

A printer that performs printing on a print target includes a motor, a storage device, a measurement control device, a corrected output power calculating device, and a corrected output power applying device. The motor applies a driving force for transporting a transport object. The storage device stores reference information relating to reference stop characteristics of the motor. The measurement control device controls driving of the motor for measuring actual stop characteristics of the motor. The corrected output power calculating device outputs a corrected output power by comparing the actual stop characteristics with the reference stop characteristics when the measurement control device controls driving of the motor. The corrected output power applying device outputs the corrected output power to the motor so that a stop condition of stopping the transport object is satisfied.