KDA 3.1-150-3-LY0-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-LY0-W1 is part of the KDA Spindle Drives series and is a spindle drive with a rated current of 150 Amps. It features a mounted heatsink blower for forced cooling and operates with a DC supply voltage of 300 VDC. The drive accepts speed command values via SERCOS Interface and supports a second encoder input and synchronous input.
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Product Description:
The KDA 3.1-150-3-LY0-W1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. It is a closed-loop power module that regulates induction or synchronous spindles by converting intermediate DC bus energy into three-phase output for high-speed machining axes. Within an automation cell, the unit links the machine control to the motor and manages velocity feedback, torque generation, and thermal behavior so the spindle can hold speed under changing loads. The drive is intended for machine tools that need stable spindle performance during acceleration, deceleration, and varying cutting conditions.
The power stage is rated for a continuous output of 150 A, allowing direct connection to large-frame spindle motors without an external booster. A regulated bus of 300 VDC supplies the inverter section and matches common DC links used in multi-axis drive cabinets. Internal cooling relies on an auxiliary line of 220 V/50–60 Hz that powers a heatsink-mounted blower for airflow through the fin channels. Heat removal is provided by forced cooling, which supports close mounting in dense enclosures and helps control temperature during sustained spindle loading. This cooling arrangement removes heat from the power section without relying only on passive airflow inside the cabinet.
The electronics operate in ambient temperatures from 5 to 45 °C, and installation is permitted up to 1000 m above sea level before derating is required. Speed commands are transmitted over a fiber-optic SERCOS interface, which avoids analog drift and provides deterministic timing for coordinated machine functions. Position control can be expanded through a second encoder input and synchronous input, allowing dual-channel feedback for high-precision lathes or combined spindle and positioning duties. That arrangement can support spindle orientation and other indexed positioning tasks when the application requires them.
Frequently Asked Questions about KDA 3.1-150-3-LY0-W1:
Q: What is the rated current capacity of the KDA 3.1-150-3-LY0-W1 spindle drive?
A: The KDA 3.1-150-3-LY0-W1 supports a rated current of 150 A for spindle drive operations.
Q: How is the KDA 3.1-150-3-LY0-W1 spindle drive cooled?
A: This spindle drive uses a forced cooling system, with a heatsink blower mounted for efficient temperature management.
Q: What is the required DC supply voltage for the KDA 3.1-150-3-LY0-W1?
A: It accepts a DC supply voltage of 300 VDC for its internal operation.
Q: What interface does the KDA 3.1-150-3-LY0-W1 use for speed command values?
A: The speed command value for this model is provided via a SERCOS interface.
Q: What is the maximum installation elevation for the KDA 3.1-150-3-LY0-W1?
A: This unit is designed to operate at altitudes up to 1000 meters above sea level.
