KDA1.1-100-300-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA1.1-100-300-W1 is a spindle drive from the KDA Spindle Drives series with a current rating of 100 Amps and a DC bus voltage of 300 Volts DC. This panel mount drive uses forced cooling and supports a 3-phase AC output. It operates within an ambient temperature range of 5 to 45 degrees Celsius and allows installation up to 1000 meters above sea level.
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Product Description:
The KDA1.1-100-300-W1 spindle drive is manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. Intended for panel mounting, the unit supplies regulated power to high-speed machine-tool spindles and ties directly into CNC or PLC control loops. It rectifies the incoming mains, stabilizes a DC link, and then delivers variable-frequency output so that drilling, milling, and grinding heads can accelerate or decelerate exactly as commanded during automated production. This operating method supports spindle applications that require quick speed changes without interrupting controlled machine motion.
The power stage provides a continuous output of 100 A while drawing from an intermediate circuit fixed at 300 VDC. Internal logic rails must stay above 13 V on the 15 Vm line and above 20 V on the 24 V1 control line to keep the gate drivers active. The inverter reconstructs this energy into balanced three-phase AC output for the spindle, and it monitors the link with a DC-bus cutoff set at 250 V. Forced-air cooling channels heat away from the power stack, and the panel-mount chassis supports this airflow path. Control data moves over a 110 mm command cable terminated in a 14-pin plug, while supply symmetry must stay within a 250 mV match window to avoid a diagnostic trip. That protection helps keep the output stage from reacting to an unbalanced control supply.
During fault recovery, the bridge logic waits 2 ms between gating retries and enforces a further inhibit of 5 ms if consecutive errors occur, reducing stress on the power semiconductors. An overtemperature condition must persist for 2 min before shutdown is triggered, allowing brief thermal excursions without unnecessary stoppage. Continuous service is specified for ambient rooms between 5 to 45 °C, and installation should remain below 1000 m elevation so that air density supports the forced-cooling scheme. These delay periods help the drive avoid repeated switching attempts when a fault is still present. Maintaining the stated ambient and installation conditions supports reliable airflow through the cooling path during long machining cycles.
Frequently Asked Questions about KDA1.1-100-300-W1:
Q: What is the current rating of the KDA1.1-100-300-W1 spindle drive?
A: The KDA1.1-100-300-W1 spindle drive operates with a current rating of 100 A.
Q: What type of cooling does the KDA1.1-100-300-W1 spindle drive use?
A: This spindle drive uses a forced cooling method to maintain optimal operating temperatures.
Q: What is the mounting type of the KDA1.1-100-300-W1 spindle drive?
A: The KDA1.1-100-300-W1 is suitable for panel mounting in industrial control cabinets.
Q: What is the maximum allowed installation elevation for the KDA1.1-100-300-W1 spindle drive?
A: It supports a maximum installation elevation of 1000 meters above sea level.
Q: What ambient temperature range does the KDA1.1-100-300-W1 spindle drive support?
A: The KDA1.1-100-300-W1 operates within an ambient temperature range of 5 to 45 degrees Celsius.
