KDA 3.1-150-3-APS-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-APS-W1 is a spindle drive from the KDA Spindle Drives series. It features a rated current of 150 Amps and utilizes forced cooling with a mounted heatsink blower running on a 220V AC source. The drive offers an RS 232 C serial interface and supports analog speed command values.
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Product Description:
The KDA 3.1-150-3-APS-W1 spindle drive is manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. It functions as the power and control stage between the DC bus and a high-speed spindle motor, converting control commands into precise torque and speed profiles for CNC machining centers and automated grinding stations. Integrated drive electronics and a dedicated heat sink blower help maintain stable operating temperature during continuous duty. It is intended for spindle applications where speed stability affects surface finish, tool behavior, and cycle consistency.
The power section is energized from a bus voltage of 300 VDC, allowing the inverter to modulate spindle currents without an intermediate AC rectifier. Continuous load handling is supported up to 150 A, so the drive can accelerate large spindle masses without thermal derating under normal operating conditions. The heat sink blower runs from an auxiliary supply of 220 V/50–60 Hz, providing airflow that does not depend on spindle speed. Internal components use forced cooling, which helps move heat away from the power semiconductors and the heat sink surface. Installation is specified for sites up to 1000 m above sea level, and separate blower power keeps cooling active even during low-speed spindle operation.
A serial interface (RS-232C) lets external software exchange parameters and fault data, while the speed loop accepts an analog command from compatible CNC controls. Operation is permitted within an ambient range of 5 to 45 °C, which suits typical enclosed machine cabinets and standard factory conditions. Cooling air is supplied by a mounted heat sink blower that pulls air through the fin stack to support stable thermal behavior. A second encoder input can be used for spindle or auxiliary motor feedback, improving control during spindle orientation, rigid tapping, and tool-change positioning. This arrangement allows the drive to work with established control platforms while still supporting repeatable spindle response during dynamic machine cycles.
Frequently Asked Questions about KDA 3.1-150-3-APS-W1:
Q: What type of cooling does the KDA 3.1-150-3-APS-W1 spindle drive use?
A: The KDA 3.1-150-3-APS-W1 utilizes a mounted heatsink blower with forced cooling.
Q: What voltage and frequency does the heatsink blower of the KDA 3.1-150-3-APS-W1 require?
A: This spindle drive accepts a 220V AC source at 50-60Hz for its heatsink blower.
Q: What is the rated current of the KDA 3.1-150-3-APS-W1 spindle drive?
A: The rated current for the KDA 3.1-150-3-APS-W1 spindle drive is 150 A.
Q: What type of additional serial interface is available on the KDA 3.1-150-3-APS-W1?
A: A serial interface (RS 232 C) is included among the additional interfaces on this model.
Q: What is the supported ambient temperature range for the KDA 3.1-150-3-APS-W1?
A: Operation is supported in ambient temperatures ranging from 5 to 45 degrees Celsius.
