
Oil Well Pump Motors

Electrical Motors are electromechanical devices that convert electrical energy to mechanical energy by producing a rotating force (torque) measured in revolutions per minute (RPM) and horsepower (HP). Medium size motors are designed and built to operate at 60 Hz with three phase voltage at 230 volts, 460 volts and 575 volts. These motors are used to drive compressors, pumps, fans, machine tools, conveyers and other processing and materials handling equipment in industrial sectors.
Oil Well Pump Motors are used to power pumps that are used to pump oil from the ground. The motors are typically high-horsepower, ranging from 100 to 1000 horsepower, and can be either single-phase or three-phase. They are designed to operate in harsh environments and are built to withstand high temperatures, pressures, and vibrations. Oil well pump motors are high slip, or NEMA design D, which have increasing torque per amps as the motor moves from synchronous rotation to a locked rotor state. Standard NEMA Design A, B or C motors operate at one to five percent slip, while a NEMA D motor has a high slip of five to eight percent. As slip increases, the torque will continue to increase. Additional features include a 1.15 service factor, class F insulation, heavy duty ball bearing construction and IP55 protection.
Products
FAQs
Do oil well pump motors come with totally enclosed fan cooled enclosures?
Yes, oil well pump motors often come with totally enclosed fan-cooled (TEFC) enclosures. TEFC enclosures are designed to provide a high level of protection for motors operating in harsh environments, such as those found in oil well applications.
Motor Starters, Soft Starters and VFDs
Motor Starters
Motor starters safely start and stop a motor in industrial applications. They are designed with a contactor, overload and circuit protection. They are used when basic motor control is required, where torque on the motor is not a concern and speed control is not needed. The advantages of motor starters include: lower cost, allows for remote operation, allows for monitoring of motor state (with the use of auxiliary contacts) and they are safe and efficient. The disadvantages include: high inrush current that can cause fuses to blow and breakers to trip if the inrush is too high, and the starter will allow a full torque to start the motor which can cause the motor to ramp up to full speed very quickly potentially causing the motor to wear and degrade prematurely.
Soft Starters
Soft starters protect motors from inrush current by gently ramping up the motor to full speed. They provide all of the same functions as a traditional motor starter. The advantages of soft starters include: they are less expensive than a VFD when only startup control is needed, they are a smaller system than a VFD where space is a concern and they prevent unwanted torque upon startup, prolonging the life of the motor. The disadvantages include: they are more expensive than a traditional motor starter and they do not allow for full speed control.
VFDs
A Variable Frequency Drive (VFD) allows for the slow ramp up of a motor during startup and the slowing down of the motor during shutdown. It also allows for full speed control during the entire run cycle of the motor. VFDs provide the same functions as both the traditional motor starters and soft starters. The advantages of VFDs include: full speed control (start, stop and in-between), more custom control and monitoring, energy savings due to efficient motor usage and less wear and tear on the motors. The disadvantages include: they are more expensive and larger than other motor control options and they generate heat that may require fans or AC units.