KDA 3.2-150-3-DPI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-150-3-DPI-W1 is a spindle drive from the KDA Spindle Drives series. It operates with a rated current of 150 Amps and uses a forced cooling system with a mounted heatsink blower powered at 220V, 50-60Hz. This drive supports a digital 16-bit parallel speed command value and features additional interfaces for incremental encoder output and a second encoder input for spindle or motor feedback.
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Product Description:
The KDA 3.2-150-3-DPI-W1 is a spindle drive produced by Bosch Rexroth Indramat for the KDA Spindle Drives series and is classified as design series 3, version 2. The unit converts regulated DC link energy from an Indramat supply module into three-phase output for high-speed machine tool spindles with closed-loop precision. By accommodating both primary and secondary encoder signals, it serves as the main speed and torque regulator in CNC machining centers and other automated stations that require accurate rotational control. This arrangement allows the spindle axis to respond quickly to changing load conditions during cutting, drilling, and similar machining processes.
The drive requires a bus supply of 300 VDC, from which the inverter can deliver up to 150 A of continuous motor phase current. Thermal management is handled by a dedicated blower powered from a 220 V, 50/60 Hz mains tap. The fan is mounted directly on the heat exchanger as a mounted heatsink blower, and air is forced across the fins under forced cooling to keep the power devices within their temperature limits. This cooling arrangement supports sustained spindle loading and repeated acceleration cycles, while a second encoder input allows direct spindle feedback or additional motor feedback without separate interface hardware.
The drive operates in ambient temperatures from 5 to 45 °C and at elevations up to 1000 m above sea level before derating is required. Spindle speed references arrive as a 16-bit parallel digital command, which reduces the offset and drift associated with analog setpoints. For downstream coordination, the integrated incremental encoder output streams real-time position data to numerical controllers, process monitors, or safety relays. This feedback path supports synchronized motion with other axes and helps maintain consistent spindle supervision during automated machining.
Frequently Asked Questions about KDA 3.2-150-3-DPI-W1:
Q: What is the rated current capacity of the KDA 3.2-150-3-DPI-W1 spindle drive?
A: The KDA 3.2-150-3-DPI-W1 supports a rated current of 150 A for demanding spindle drive applications.
Q: What DC supply voltage is required for the KDA 3.2-150-3-DPI-W1?
A: This model operates with a DC supply voltage of 300 VDC.
Q: What cooling method does the KDA 3.2-150-3-DPI-W1 use?
A: The KDA 3.2-150-3-DPI-W1 utilizes a mounted heatsink blower for forced cooling.
Q: What is the purpose of the second encoder input on the KDA 3.2-150-3-DPI-W1?
A: It offers a second encoder input intended for spindle feedback or additional motor feedback.
Q: How is the speed command value input to the KDA 3.2-150-3-DPI-W1 spindle drive?
A: The KDA 3.2-150-3-DPI-W1 accepts a digital speed command value using a 16-bit parallel interface.
