BDS4A-220J-WO Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen BDS4A-220J-WO is part of the BDS Industrial Servo Drives series and delivers a nominal output voltage of 230 VAC along with a continuous output power of 7.3 kVA. This servo drive features a continuous output current of 20.0 A RMS per phase and a peak output current of 40.0 A RMS per phase. It is cooled by a fan and can operate with a main DC bus voltage between 250 VDC and 360 VDC.
Internal Product Review
The BDS4A-220J-WO is a Kollmorgen industrial servo drive rated for 20.0 A RMS/phase continuous output current and 7.3 kVA continuous output power. Fan-cooled construction and 175 W internal heat dissipation support stable thermal management in continuous-duty service. A 40.0 A RMS/phase peak output current gives this drive excellent dynamic headroom for demanding motion applications.
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Product Description:
The BDS4A-220J-WO is a digital servo drive produced by Kollmorgen within the BDS Industrial Servo Drives series. It interfaces between a DC bus and a three-phase servomotor to regulate torque, velocity, and position in automated machinery. By modulating the output with pulse-width control, it delivers the closed-loop performance required for packaging lines, robotics, and material-handling systems commonly found in industrial automation.
The drive can produce a continuous phase current of 20.0 A RMS per phase, allowing sustained torque for axes that run without pause. That current corresponds to a continuous apparent power of 7.3 kVA when the controller delivers its rated line-to-line voltage of 230 VAC. Internally, power is drawn from a shared bus that may rise to 360 VDC; the inverter section switches this energy at a carrier frequency of 10.0 kHz to synthesize a sinusoidal waveform. Speed accuracy drifts by only 0.075% per °C, so thermal changes inside an enclosure have minimal effect on velocity loops. Fan cooling removes 175 W of conversion losses, and the dedicated blower draws 0.5 A from the control supply. A form factor of 1.01 keeps harmonic distortion on the mains within accepted limits, while a motor current ripple frequency of 20.0 kHz sets the bandwidth for compatible feedback filters.
For intermittent moves or rapid indexing, the amplifier can surge to 40.0 A RMS per phase, doubling torque for short bursts without exceeding thermal limits. Under these transient conditions, it supplies up to 14.5 kVA to the motor while maintaining switching stability. The power stage remains active as long as the common DC bus maintains at least 250 VDC, preventing undervoltage trips during regenerative events. A resolver carrier frequency of 7.0 kHz aligns position feedback with the modulated output. This synchronization supports accurate feedback processing as the drive regulates rapid changes in motor position and velocity.
