For a compact inverter drive that provides powerful and precise motor speed control, look no further than the PowerFlex 4 AC drives by Allen Bradley. These PowerFlex devices have a space-saving design and can be DIN rail or panel mounted. It is the smallest member of the PowerFlex Variable Frequency Drive family and is designed for optimal flexibility and ease-of-use. It offers an economical alternative for speed control of applications such as pumps, conveyors, fans, machine tools, and material handling systems.

PowerFlex 4 devices are available in power ratings from 0.2 to 1.5kW (single phase) and 0.37 to 3.7 kW (3 phase) in voltage classes of 230 and 400 volts. They offer V/Hz control, slip compensation, RS-485 communication, and Auto Restart and Flying Start functions. Integral dynamic brake resistor is available on ratings 0.75kW and above.

• Simplified start-up due to keypad control keys and potentiometer which are active out of the box
• Can be DIN rail or panel mounted for easy installation and application versatility
• Efficient Zero Stacking allows the mounting of drives side by side with no air gap to save valuable panel space
• Built-in keypad features a 4 digit display and 10 additional LED indicators for fast, easy status indication
• Robust overload protection: 150% for 60 seconds, 200% for 3 seconds
• Basic Program Group contains 10 most common application parameters to ensure quick and simple programming
• Integral EMC filtering on single phase drives to meet EN55011 standard

The 22A-D8P7N104 PowerFlex 4 unit is a 3 Phase AC drive which has an input voltage of 480V ac, 3PH and an output current of 8.7 Amps. The power rating is 3.7 kW. The enclosure has an ingress protection rating of IP20 (Open). This AC drive is frame size B.

An Inverter drive (also known as AC Drive, Variable Frequency Drive, or VFD) is a motor drive device which regulates the amount of power supplied to a motor, allowing for precise control of speed or torque to the motor to suit its application. They are situated between an electrical supply and a motor. Electrical motors run many things we use in our society today and AC drives are used for speed control in a range of applications, such as simple fan and pump loads. These units are also used widely in industrial applications for high torque machine control. Most now have features such as digital operation and LED displays allowing for easy set-up, monitoring, and adjustment of parameters by the user.

Inverter drives are controlled by inputting specific frequencies or parameters into the device. When power goes through the drive the inverter adjusts the frequency and voltage that is supplied to the motor. They ensure that an electrical motor receives only the necessary amount of power it requires to function, in order to reduce waste or loss of electrical energy, thereby making it more efficient to run. They can also gradually ramp up power for a slower, safer machine start up. Inside the inverter, incoming AC power is converted to DC power via a rectifier made up of diodes, which is then smoothed to a clean, constant voltage by capacitors, and is then fed back out as AC power via output transistors.