Dynamometers​

Dynamometer

What is a dynamometer?

Overview

A dynamometer is a testing device that precisely measures the torque, rotational speed, and power generated by rotating machinery such as engines, motors, e‑Axles, and jet engines.
It is used for a wide range of applications, including performance evaluation, durability testing,
development of electrified powertrain systems, and compliance assessment for vehicle test‑mode regulations.

Main Functions of the Dynamometer

・Torque Measurement — Measures the force acting on the rotating shaft.
・Rotational Speed Measurement — Acquires RPM with high precision.
・Power Calculation — Computes mechanical power from torque × rotational speed.
・Load Application — Reproduces arbitrary load conditions using absorption or motoring modes.
・Test‑Mode Simulation — Simulates driving cycles such as WLTC, US06, and NEDC.
・Regenerative Operation — Reduces energy cost through power regeneration.

Type of dynamometers

Our dynamometers

Started sales of the first model in 1968, and surpassed a cumulative total of 3,000 units sold over approximately 60 years.

We are the only long‑established manufacturer in Japan capable of covering a wide output range from 2.2 kW to 20,000 kW.Our extensive product lineup supports evaluation of all types of drivetrains, including automotive, construction machinery, agricultural machinery, marine engines, and motors.