KDF1.2-150-300-W1-115 Bosch Rexroth Indramat
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MPN: R911225993
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The Bosch Rexroth Indramat KDF1.2-150-300-W1-115 is part of the KDF Variable Frequency Drives series and supports a maximum motor power of 25 hp and a current rating of 150 Amps. This drive is blower cooled, weighs 20.4 kilograms, and operates with a DC bus voltage of 300 VDC. It features a digital velocity loop control and supports four-quadrant operation with a peak output current of 300 Amps.
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Product Description:
The KDF1.2-150-300-W1-115 is a variable frequency drive produced by Bosch Rexroth Indramat for the KDF Variable Frequency Drives series. The unit converts a fixed 60 Hz mains supply into a controllable voltage and frequency that allows closed-loop speed regulation of induction and servo motors in automated machine tools, material-handling stations, and process lines. By modulating the DC bus and coordinating regeneration in four operating quadrants, it enables precise velocity control and energy recovery during acceleration and braking.
Its power section accepts a three-phase input of 220 VAC, rectifies it to a bus level of 300 VDC, and delivers a continuous phase current of 150 A. With this current, the inverter supports motor outputs up to 25 hp while maintaining a commanded speed ceiling of 8000 rpm. Differential analog command lines interface with the digital velocity loop so reference changes are sampled without common-mode errors, and the controller runs the loop digitally for stable gain across temperature. Four-quadrant operation means motoring and regenerative torque are available in both directions, so the same drive handles start, stop, and hold without external contactors. A blower mounted on the heat sink forces ambient air across the IGBT modules, and the airflow path is sized for continuous duty under rated load.
The auxiliary fan operates from a dedicated 115 VAC supply and dissipates approximately 40 kW of braking power through the integrated bleeder during rapid deceleration. During short transients, the inverter can deliver a peak phase current of 300 A, providing additional torque margin for high-inertia starts. Weighing 20.4 kg, the drive can be panel-mounted without structural reinforcement and remains within standard cabinet load limits.
Frequently Asked Questions about KDF1.2-150-300-W1-115:
Q: What is the maximum motor power supported by the KDF1.2-150-300-W1-115 drive?
A: The KDF1.2-150-300-W1-115 is designed for a maximum motor power of 25 horsepower.
Q: What type of control loop is implemented in the KDF1.2-150-300-W1-115?
A: This model operates with a digital velocity control loop for precise speed regulation.
Q: What is the maximum speed rating of the KDF1.2-150-300-W1-115 variable frequency drive?
A: The KDF1.2-150-300-W1-115 supports a maximum speed of 8,000 RPM.
Q: What cooling method does the KDF1.2-150-300-W1-115 use?
A: Blower cooling is used for this unit, enhancing thermal management during operation.
Q: What is the input voltage specification for the KDF1.2-150-300-W1-115 drive?
A: The input voltage required for the KDF1.2-150-300-W1-115 is 220 VAC.
