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"Over 120 Years of Power Resistor Experience!"

Being first a manufacturer of industrial power resistors, Post Glover has a vast array of Dynamic Braking Resistors to choose from. This allows us to offer the best possible technical and economic solution for your particular brake resistor application. We have worked with many OEMs and built a broad knowledge of their product specifications for dynamic brake resistors, so when you call in requesting a part, Post Glover can cross-reference the part number and quote the needed part.

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Click the name of the manufacturer below to Download the following cross reference guides (Adobe PDFs)

How Post Glover Makes Your Life A Little Simpler

We make buying resistors easy for our customers by striving to be the leader in cost and customer service. 24 hour turnaround on dynamic braking resistor quotes.

We need just a few basic details to properly size your DBR:

  1. Ohms

  2. Watts

  3. Duty cycle (time on/time off)

 

Ohms are determined by the drive manufacturer and are usually stated as a range or minimum.

Watts are stated as either a maximum braking power or continuous braking power. In either case, the wattage rating of the resistor is calculated by the braking cycle.

Braking cycle is usually stated as a percentage; however, the actual times on and off can be used to offer the optional resistor package while minimizing size and cost.

Click the Image to Download A Part Number Configuration Chart

Territory Coverage: California & Nevada for Dynamic Breaking Resistors

State of the art AC Variable Frequency Drives (VFD) are commonplace today, creating the need for reliable, proven Dynamic Braking Resistors that can be delivered quickly, completely assembled, and ready for convenient installation at the job-site. Dynamic Braking Resistors are used with AC VFD’s to produce a braking torque in the motor during overhauling conditions. The dynamic braking resistor is connected across the DC bus and will see voltages as high as 800 volts.

How Dynamic Braking Resistors Work?

The drive manufacturer normally determines the power rating (watts) needed to prevent overheating during braking duty. The peak braking current is determined by the specified resistance value. Each drive manufacturer specifies a resistance range with a minimum to prevent overcurrent and damage to the drive and a maximum value to give adequate lower dissipation capability.

A three-phase variable frequency drive (VFD) consists of three basic components – rectifier, DC line, and inverter – and a control system to manage these three components as illustrated. The rectifier converts the three-phase 60Hz AC input to a DC signal.

Depending on the system, an inductor, a capacitor, or combination of these components smooths the DC signal (reduces voltage ripple) in the DC link part of the VFD. The inverter circuit converts the DC signal into a variable frequency AC voltage to control the speed of the induction motor.

During braking, the VFD ramps the frequency to zero. The rotational energy of the motor and load are driven back through the inverter to the DC bus.

Post Glover Resistors
1369 Cox Avenue
Erlanger, Kentucky 41018

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