VSD-E / VSD-XE Q & A

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My motor voltage is higher than 160V, does it work with VSD-E?

The lower voltage will only limit motor maximum speed but otherwise functionality stays same. For example 200VAC servo motor probably reaches ~50-65% of rated top speed at 160VDC supply. Voltage is solely determined by motor winding (number of coil turns) and usually motor makers offer different winding options to match different supply voltages.

Who are the target audience for VSD-E/XE?

VSD-E/XE are designed for position, velocity or torque applications in automation and robotics as well as CNC equipment. VSD-E/XE is perfect for you if you have:

  • Servo motors, up to 140VDC or 110VAC rated
  • Up to 1500W motor rating
  • Encoder feedback on motor

You may need to make compromise with VSD-E if you have 200VAC AC servo motors (see question above).

What all hardware items I need to make functional drive system?

List of all recommended items in typical PC CNC application:

  • Drives (VSD-E/XE )
  • VSDEPI interface boards to connect from PC parallel port to drives *
  • Servo motors (see GD's motors )
  • USB adapter for drive configuration from GDtool
  • 12V power supply for drives (at least 20W recommended)
  • Servo power supply matching with motor rated voltage and power, typically 30-150VDC and 50-1500W
  • Wiring material and connectors to connect all together (see installkit)
  • Enclosure or DIN rail where to install electronics
  • Control software, such as Mach3 or EMC2 or equivalent *
For SimpleMotion application you don't need the items marked with star. However, one USB adapter per drive axis is then needed.

How to make simple point-to-point application to PC?

The easiest approach is to use SimpleMotion library which talks to drives thru USB bus.

What are the differences between VSD-E and VSD-XE?

The advantages of VSD-XE over VSD-E are:

  • 2 year standard warranty vs 1 year
  • Higher continuous output current ratings (+40% in most cases, see drive manual for details)
  • High performance heatsink to encance passive cooling without fan

The output current limits are fixed in drive hardware for protection & reliability, so VSD-E can't be turned into VSD-XE just by adding larger heatsink.

Do the DualDC (2 axis mode) and Evolution (single axis) work on same drive hardware?

Yes. The hardware (VSD-E or VSD-XE) are identical for DualDC and Evolution. The desired firmware can be uploaded by user without additional costs.

How does VSD-E/XE homing function work?

VSD-E & XE in single axis mode (not DualDC) supports advanced internal homing function. When homing sequence starts, drive automatically drives motor to searches for home switch or mechanical hard stop and then optionally also encoder index pulse. Homing can be initiated by three ways:

  • Automatically when powered on
  • By a digital signal to one of drive inputs
  • Via serial interface command

What are RMS output ratings for VSD-XE for 3 phase AC motor?

The DC power specs of VSD-XE are: input max 160VDC, continuous output 14ADC, peak output 20ADC, output duty cycle 88%. These produce following RMS sinusoidal output ratings at 160VDC input:

  • Phase-to-phase voltage 86.5VAC (this is the value that usually matters)
  • Phase-to-neutral voltage 50.0VAC
  • Output current 10Arms cont, 14Arms peak
  • Output power 1480Wrms cont 2120Wrms peak
For comparison, typical 230VAC powered drive has phase-to-phase output voltage of 150-175VAC