KDA 3.1-050-3-APD-U1
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The KDA 3.1-050-3-APD-U1 servo drive features a rated power output of 5.0 kW, operates on an input voltage of 3 x 380-480 V AC, and has a rated current of 11 A. Part of the KDA Spindle Drives series by Bosch Rexroth Indramat, it offers IP20 protection and integrates control for a holding brake.
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Product Description:
The KDA 3.1-050-3-APD-U1 is a high-precision Spindle Drive, and its cooling is carried out through a forced cooling principle with a heat sink fan, which actively controls internal temperatures. The Bosch Rexroth Indramat has made this drive, and it operates on a DC bus voltage of 300 V to ensure stable energy distribution in the control systems.
This spindle drive performs under a current load of 50 A to handle dynamic spindle motor processes under full-load conditions without thermal overload and performance loss. The highest installation altitude rating allowed for the KDA 3.1-050-3-APD-U1 drive is 1000 meters without derating, which means it can be installed at this height without compromising its existing capacity. The fan of this motor’s heat sink needs a 115 V AC supply voltage to be operated by normal industrial power sources without the need for further converters. This fan also supports a frequency range of 50–60 Hz for reliable cooling performance in both frequency ranges. This drive is provided with its speed setpoint through an analogue ±10 V input to give smooth velocity commands from the controller with low signal distortion. The position setpoint of this spindle drive is sent as a 16-bit parallel digital input to give high-resolution positional feedback for tasks requiring precision in machines.
The storage temperature range of the KDA 3.1-050-3-APD-U1 drive is defined from -30°C to +85°C for secure material conditions during long-term storage or shipment in different environments. This spindle drive accommodates a maximum relative humidity of 70% in non-condensing environments to ensure suitability for installation in climate-conditioned industrial plants. The weight of this spindle drive (without the blower) is 16.6 kg, and it necessitates appropriate mounting support within electrical enclosures. Its blower unit incorporates an additional weight of 4.2 kg, which must be factored into system layout and structural design.
Frequently Asked Questions about KDA 3.1-050-3-APD-U1:
Q: Why is a 16-bit parallel digital input used for position control?
A: It provides high-resolution feedback, enabling accurate motion control in precision applications. This minimizes positional error during spindle operations.
Q: What advantage does forced cooling by a heat sink fan offer in KDA 3.1-050-3-APD-U1?
A: It prevents overheating during extended use, which enhances performance under continuous load. It also increases component lifespan through thermal regulation.
Q: How does the ±10 V analogue speed input improve control performance?
A: It allows linear speed control, improving system response time and motor stability. This ensures smooth acceleration and deceleration during spindle operations.
Q: Why is the 115 V AC supply voltage significant for the heat sink fan?
A: It allows direct integration with standard industrial AC power sources. This simplifies installation without the need for voltage converters.
Q: What role does the 50–60 Hz fan frequency range play in cooling efficiency?
A: It supports both domestic and international power systems. This frequency compatibility ensures consistent fan performance across regions.
