Electronic test and verification firm Pickering Interfaces has expanded its 41-670 (PXI) and 43-670 (PXIe) LVDT, RVDT and resolver simulator modules to include high-speed resolver simulation up to 130 kRPM rotation to provide precise testing of advanced servo systems in industries such as automotive, aerospace and defense.

The updated module enables the simulation of multiple resolver pole pairs. While most electromechanical resolvers have a maximum rotational speed of 20 kRPM when simulating, for instance, four pole pairs, the corresponding x4 factor means this becomes 80 kRPM electrical cycles to simulate.

The 41-670 (PXI) and 43-670 (PXIe) range is well suited to simulating variable differential transformers (VDT), both linear (LVDT) and rotary (RVDT) types, as well as resolvers delivering high-speed simulation up to 130 kRPM rotation. They have two (41/43-670-303) or four (41/43-670-301) banks, each capable of simulating the output of a single 5- or 6-wire VDT or resolver, or dual 4-wire utilizing a shared excitation signal. This allows the module to simulate up to 4 channels of 5- or 6-wire or eight.

PXI high-channel density enables the testing of multiple resolver channels in a compact footprint. Built-in relays enable the 41/43-670 to provide short or open circuits for each channel’s inputs and outputs, reducing the need for external switching for fault insertion requirements. The programmable phase delay can also be used for simulating imperfect sensors and cabling, artificially offsetting single or multiple outputs.

“Rather than rely on FPGA approximations, our updated family of resolver simulators use actual transformers on board,” said Stephen Jenkins, Simulation Product Manager at Pickering Interfaces. “As a result, our modules deliver precise, real-world analog signals with high-resolution angle simulation, ensuring reliable performance even at the highest speeds.”

Source: Pickering Interfaces