A compact precision analyzer combines direct high-voltage measurement, wide bandwidth, motor-signal support, and scalable synchronization for demanding electric mobility and energy-system testing.
Yokogawa Test & Measurement has introduced the WT1500 Precision Power Analyzer, a measurement platform designed for high-voltage electric vehicle (xEV), power-conversion and renewable-energy equipment testing. The instrument combines direct measurement capability up to 2000 V DC with high measurement accuracy, helping engineers evaluate increasingly high-voltage systems without adding dedicated external voltage dividers.
The key features are:
- Direct 2000 V DC measurement capability
- Dual measurement elements for different test conditions
- Integrated encoder and resolver signal inputs
- IEEE 1588 time-synchronization support
- Expandable architecture up to 20 power-measurement channels
It is built around two measurement elements that allow the same instrument to address different test requirements. Its high-voltage element supports direct measurement up to 2000 V DC with bandwidth extending to 300 kHz, targeting power conversion systems (PCS) and energy storage systems (ESS). A separate wide-bandwidth element supports up to 1000 V and 2 MHz bandwidth for capturing the complex, higher-frequency waveforms produced by modern xEV motor systems. Both element types can be combined in one analyzer through a common sensor input.
For motor evaluation, the analyzer accepts encoder and resolver signals, allowing electrical power measurements and motor-position information to be handled within the same test setup. This can simplify the efficiency evaluation of motors, e-Axles, and inverter systems that previously required separate signal acquisition and synchronization. The instrument can also support up to four power measurements and four motor evaluations.
System integration is another focus. It uses a compact 2U, 19-inch rack-width form factor and provides interfaces for remote operation and automated test environments. CAN/CAN FD data output, UDP communication, and IEEE 1588 time synchronization support integration with broader measurement and control systems.
For larger measurement configurations, as many as five WT1500 units can be synchronized, expanding the system to 20-channel power measurement. The analyzer also supports multiple current-sensor configurations, including high-current AC/DC sensors and clamp-type probes, broadening its suitability for automotive and energy-system test benches.
Applications include xEV motor and inverter evaluation, e-Axle testing, high-voltage ESS and PCS characterization, renewable-energy equipment development, and automated production or validation systems. The combination of high-voltage measurement, bandwidth, motor-signal handling and scalable channel architecture is intended to simplify test setups as electrified systems become more powerful and complex.
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