EconoTest manufactures four dynamometer families: dynamomètres à hystérésis (Série EC/ECO) for precision low-torque testing, dynamomètres à courants de Foucault (série ECW) for high-speed testing, dynamomètres à poudre magnétique (série ECF) for high-torque low-speed and production line testing, and four-quadrant AC dynamometers (EC5A à EC2000A) for motoring and loading applications. All parameters are customizable upon customer requirements.
Hysteresis dynamometers cover 0.1–30 Nm; eddy current dynamometers cover 0.5–300 Nm; magnetic powder dynamometers cover 2–2,000 Nm; AC dynamometers cover 5–2,000 Nm. Together the range spans from 0.1 Nm micro-motor testing to 2,000 Nm heavy industrial applications.
Hysteresis and magnetic powder dynamometers both deliver full rated braking torque at zero RPM, making them suitable for starting torque, couple d'encoche, and locked rotor testing. Eddy current dynamometers cannot generate torque at zero speed because braking force depends on rotor motion. AC dynamometers can apply torque at zero speed in motoring mode.
Eddy current dynamometers reach the highest speeds — up to 50,000 RPM (ECW05KB). Hysteresis dynamometers reach 30,000 RPM (Série Ko) ou 25,000 RPM (Série HB). AC dynamometers cover 8,000–18,000 RPM. Magnetic powder dynamometers are limited to 2,000–5,000 RPM and are best for low-to-medium speed applications.
Hystérèse: ±0,5 % pleine échelle (Série Ko) or ±0.2% (HB high-precision series). Courant de Foucault: ±0.2% to ±0.5% full scale. Poudre magnétique: ±0.2% to ±0.5% full scale. Dynamomètres AC: ±0.20% full scale for both torque and speed.
Eddy current dynamometers are all water-cooled. Modèles de poudre magnétique ci-dessous 20 Nm sont refroidis par air, 20 Nm and above are water-cooled. Hysteresis cooling varies by model: air, air+eau, water+blower or air+blower. Cooling requirements are specified per model in the technical documentation.
Absorption dynamometers (hystérèse, courants de Foucault, poudre magnétique) can only apply braking load — they absorb energy from the unit under test and dissipate it as heat. A four-quadrant AC dynamometer can both load and drive the test article in both rotation directions, and recovers braking energy back to the grid, enabling efficiency mapping and hybrid powertrain simulation.
Oui. EconoTest offers multiple dynamometer solutions that combine different dynamometer types on a single platform, allowing one test bench to cover a wider torque and speed envelope. Contact EconoTest engineers to configure a combined solution for your test range requirements.