
RPM Motors

RPM motors are electric motors that utilize rotational force to generate power. These motors are designed to rotate at a specified speed, and can come in single-phase and three-phase designs. Single-phase motors require one power source and are often used in light-duty applications, while three-phase motors require three power sources and are used in heavy-duty applications. RPM motors are capable of creating up to 200 horsepower and are used in a variety of applications, such as elevators, pumps, compressors, and conveyor systems. They are also used in numerous industries, including manufacturing, commercial, and residential. RPM motors are reliable, efficient, and cost-effective. They are also easy to maintain, making them an ideal choice for a variety of applications.
Baldor-Reliance RPM XE eXtreme Efficient Motors are designed for continuous operation on compressors and pumps. They are NEMA drop-in replacement motors, which achieve leading efficiency and lower lifetime costs. These synchronous motors start across the line and offer IE4+ efficiencies. The motors are also capable of operating on a standard inverter without feedback. RPMIII DC Motors are designed with a laminated frame which provides more power and reliability in a smaller package. The laminated frame improves heat dissipation and commutation, and requires less mounting space than conventional designs.
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.