KDA 2.1-100-3-LQD-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-100-3-LQD-W1 is a spindle drive from the KDA Spindle Drives series. It features a rated current of 100 Amps and requires a DC supply voltage of 300 VDC. The drive uses forced cooling with a mounted heatsink blower and includes additional digital interfaces for position command value.
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Product Description:
The KDA 2.1-100-3-LQD-W1 is a spindle drive produced by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. This drive belongs to Series 2 and is intended to regulate torque and speed on high-frequency machine tool spindles within automated production lines. It acts as a current-controlled inverter that converts shared DC-bus energy from an Indramat supply module into three-phase power for the spindle motor, enabling accurate acceleration, braking, and position holding during cutting, drilling, or grinding tasks. This operating principle supports stable speed regulation when spindle load changes during machining.
The drive is energized by a DC link of 300 VDC, and it can deliver a continuous output of 100 A to the connected spindle motor, so upstream supply modules and cabling must accommodate that current. An integral blower mounted on the heat sink is powered from an auxiliary source of 220 V, 50/60 Hz; this dedicated fan removes waste heat directly from the power semiconductor baseplate. The cooling arrangement uses a heat sink-mounted blower with forced cooling, which keeps internal component temperatures within limits even at sustained high current. This helps the power section remain thermally stable during continuous spindle duty.
Safe operating limits include an ambient range of 5 to 45 °C and installation altitudes up to 1000 m above sea level; installations outside these limits require corrective measures such as cabinet conditioning or output reduction. Speed references are exchanged over a SERCOS interface, while an independent channel carries a digital position command value, allowing coordinated motion control with CNC or PLC masters. Digital signaling helps reduce analog drift and supports consistent command transfer between the controller and spindle drive. These communication paths also simplify wiring for tightly synchronized spindle axes in multi-channel machining centers.
Frequently Asked Questions about KDA 2.1-100-3-LQD-W1:
Q: What is the rated current of the KDA 2.1-100-3-LQD-W1 drive?
A: The KDA 2.1-100-3-LQD-W1 spindle drive operates with a rated current of 100 A.
Q: How does the KDA 2.1-100-3-LQD-W1 spindle drive manage thermal cooling?
A: This model uses a forced cooling system with a mounted heatsink blower to dissipate heat.
Q: What DC supply voltage does the KDA 2.1-100-3-LQD-W1 require?
A: The spindle drive requires a DC supply voltage of 300 VDC for operation.
Q: What interface is used for speed command input on the KDA 2.1-100-3-LQD-W1?
A: It supports a SERCOS interface for speed command value input.
Q: What is the allowable operating temperature range for the KDA 2.1-100-3-LQD-W1?
A: The permissible ambient temperature range for this drive is 5 to 45 degrees Celsius.
