PXe-AC/DC Series AC-DC & DC-AC Static Power Converters

The PXe-AC/DC Series contains two separate static power-conversion platforms. The first selection is therefore the required direction of conversion, based on the available electrical source and the output required by the connected equipment.

Conversion Selection

PXe-AC-DC Configuration

PXe-AC-DC converters are configured around the available AC supply, required DC voltage, required current and connected load.
Single-phase input can be used for selected lower-power systems. Higher-power and high-current converters generally use a three-phase AC supply.

Typical AC-to-DC Configurations

High-Current DC Installation

Low-voltage high-current systems require the complete DC output circuit to be considered during specification.
Typical DC-to-AC Configurations

Cable and busbar resistance, connection resistance, output cable length and conductor cross-section can materially reduce the voltage available at the load. For high-current applications, PX Electronics can review the proposed cable arrangement and permissible voltage drop as part of system selection.
Line voltage drop compensation or remote voltage sensing can also be considered where the required voltage needs to be maintained at the connected load rather than only at the converter output terminals.

PXe-DC-AC Configuration

PXe-DC-AC converters are configured around the available DC source and the AC supply required by the connected equipment.
The nominal DC voltage alone is not always sufficient for converter selection. Battery and transport systems can operate across a relatively wide voltage range, so the minimum and maximum DC operating voltages should be confirmed together with the available source current.

DC Source and Input Current Assessment

For a given AC output power, lower DC input voltages require higher DC input current. This affects cable size, protective devices, connectors, cooling and the practical maximum converter rating.
Battery applications should be assessed at the minimum expected DC voltage, as this is normally where the converter draws its highest input current.
The nominal, minimum and maximum DC voltage together with the continuous and short-duration current available from the source should therefore be provided when specifying a PXe-DC-AC converter.

Model Identification

The PXe-AC/DC Series retains separate model identification for each conversion direction.

PXe-AC-DC identifies converters with an AC input and DC output.
PXe-DC-AC identifies converters with a DC input and AC output.

The final model and order documentation identify the input supply, output requirement, capacity, enclosure, control arrangement and connection requirements.

Representative Model References

Alternative Voltage and Current Ratings
AC-to-DC output voltage and current can be configured around the required operating point, subject to the available AC input and total converter power.

Alternative DC Input Ranges
PXe-DC-AC converters can be configured around battery, rectifier and industrial DC buses where the complete operating voltage range is known.

Single-Phase or Three-Phase AC Output
DC-to-AC systems can be supplied with single-phase or three-phase output, including three-phase four-wire arrangements where a neutral is required.

50Hz, 60Hz or 400Hz Output
Fixed-frequency DC-to-AC configurations are available according to the connected equipment and application.

Programmable Voltage and Current Control
Selected PXe-AC-DC systems provide adjustable voltage and current with constant-voltage and constant-current control.

Line Voltage Drop Compensation
Voltage-drop compensation or remote sensing can be considered for high-current DC systems where cable resistance would otherwise reduce the voltage delivered to the load.

Remote Control and Communications
Remote communication is available according to the selected controller. Interfaces can include RS232, RS485, Modbus, GPIB or Ethernet depending on converter type and configuration.

Higher Ingress Protection
Alternative enclosure protection levels can be supplied for installations requiring increased protection from dust, moisture or the surrounding environment.

Conformal Coating
Selected internal electronic assemblies can be conformally coated for humid, corrosive or condensation-prone environments.

Rack-Mount and Floor-Standing Construction
Lower-power converters can be supplied in rack-mounted formats where voltage, current and cooling requirements allow. Higher-power and high-current systems are generally supplied in floor-standing enclosures.

Application-Specific Connections
Hard-wired terminals, high-current busbars, industrial connectors, MIL-standard connectors and customer-specific cable assemblies can be supplied according to the application.

Factory Acceptance Testing
Application-specific FAT can include voltage and current checks, output regulation, protection operation, communication testing and agreed operating points.

Third-Party Witness Testing
Customer or independent third-party witnessed factory testing can be arranged where required.

The PXe-AC/DC Series contains two electrically different converter types, so the AC-to-DC and DC-to-AC specifications are shown separately.

PXe-AC-DC Technical Specification

PXe-DC-AC Technical Specification