
Pump Motors

Pump motors are typically used to provide power to pumps that are used to circulate water, air, gas, or other liquids in commercial and industrial applications. They are most commonly used in agriculture, water treatment, and petrochemical industries. Three phase electric motor-driven pumps consist of three windings that are connected to the electric power source. Each winding is connected to a different phase of the AC power. This connection creates a rotating magnetic field that provides the power for the pump. The motors are designed to provide high efficiency and reliability. The three phase electric motor-driven pump is typically powered by a three phase induction motor. The motor is designed with a stator, rotor, and a drive shaft. The stator is the stationary part of the motor and houses the windings that are connected to the power source. The rotor is the rotating part of the motor and is connected to the drive shaft. The drive shaft is connected to the pump shaft, which in turn is connected to the pump. The three phase electric motor-driven pumps are designed for a variety of power ratings and can operate at high efficiency. They are also designed to provide overload protection, high torque output, and are often used in applications that require variable speed motors. As these motors require a three phase power supply, they are not suitable for use in single phase applications.
Single phase pump motors are widely used in commercial and residential applications. These motors operate on a single phase of power and use a capacitor to create the necessary phase shift to start and run the motor. Single phase motors are relatively inexpensive, reliable and easy to maintain. Due to the simplicity of their design, these motors are often employed in pumping duties in water treatment, irrigation and other applications. Though single phase motors are limited to a lower current and horsepower, they are often preferred because of their low cost and ease of operation.
Subcategories
Products
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.