KDA 3.2-050-3-DYI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-050-3-DYI-W1 is part of the KDA Spindle Drives series and operates with a rated current of 50 Amps and a 300 VDC supply voltage. It uses a mounted heatsink blower for forced cooling and can function in environments with temperatures from 5 to 45 degrees Celsius. This spindle drive includes interfaces for incremental encoder output, second encoder input, and accepts digital speed command values.
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Product Description:
The KDA 3.2-050-3-DYI-W1 spindle drive is manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. As a dedicated spindle drive, it converts DC-link energy from an Indramat supply module into a controlled three-phase output for high-speed machine-tool spindles. The unit is Series 3 and Version 2, and it supports digital motion controllers that require precise torque regulation during milling, drilling, or grinding tasks in industrial automation. This output structure lets the spindle respond quickly to commanded speed and torque changes during demanding machining cycles.
Internally, the drive is energized from a 300 VDC intermediate circuit and can deliver a continuous phase current of 50 A, which suits medium-power spindle motors. Heat is removed by a mounted heat sink blower operating in Forced Cooling mode, and the fan receives power from a dedicated 220 V AC, 50–60 Hz supply so the main DC bus is not loaded. This arrangement separates blower power from the drive power section and keeps cooling available whenever the fan supply is present. Speed reference data enter the controller as a digital 16-bit parallel value, allowing fine resolution adjustments without analog drift. The blower is fixed directly to the rear plate and channels air across the IGBT stack and motor-field resistors to help maintain safe semiconductor temperatures during continuous service.
For field feedback and synchronization, the unit offers a second encoder input and an incremental encoder output that can be routed to the CNC control as auxiliary position channels. These interfaces support master-slave spindle arrangements, provide additional feedback paths for diagnostics, and can share spindle position data with external control functions. Rated operation is permitted within an ambient range of 5 °C to 45 °C, and cooling performance remains stable up to 1000 m of installation altitude without derating. Staying within this temperature and altitude range helps the drive avoid automatic current reduction that would lower available spindle torque.
Frequently Asked Questions about KDA 3.2-050-3-DYI-W1:
Q: What AC voltage and frequency is required for the heatsink blower on the KDA 3.2-050-3-DYI-W1?
A: The KDA 3.2-050-3-DYI-W1 is designed for use with a 220V AC heatsink blower operating at 50-60Hz.
Q: What is the rated current supported by the KDA 3.2-050-3-DYI-W1 spindle drive?
A: This model supports a rated current of 50 A, allowing for substantial spindle drive power.
Q: How is the KDA 3.2-050-3-DYI-W1 spindle drive cooled?
A: Forced cooling is provided by a mounted heatsink blower to help maintain optimal temperature during operation.
Q: What is the function of the second encoder input on the KDA 3.2-050-3-DYI-W1?
A: The second encoder input enables connection of both a second encoder and synchronous input for improved feedback.
Q: What kind of speed command value interface does the KDA 3.2-050-3-DYI-W1 use?
A: The speed command value is received in a digital 16-bit parallel format in this spindle drive.
