测功机测试解决方案

EconoTest manufactures four dynamometer families: 磁滞测功机 (EC/ECO series) for precision low-torque testing, 涡流测功机 (ECW series) for high-speed testing, 磁粉测功机 (ECF series) for high-torque low-speed and production line testing, and four-quadrant AC dynamometers (EC5A to 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, cogging torque, 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 转速 (ECW05KB). Hysteresis dynamometers reach 30,000 转速 (KB series) 或者 25,000 转速 (HB series). 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.

滞后: ±0.5% full scale (KB series) or ±0.2% (HB high-precision series). Eddy current: ±0.2% to ±0.5% full scale. Magnetic powder: ±0.2% to ±0.5% full scale. 交流测功机: ±0.20% full scale for both torque and speed.

Eddy current dynamometers are all water-cooled. Magnetic powder models below 20 Nm are air-cooled, 20 Nm and above are water-cooled. Hysteresis cooling varies by model: 空气, air+water, water+blower or air+blower. Cooling requirements are specified per model in the technical documentation.

Absorption dynamometers (滞后现象, 涡流, magnetic powder) 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.

是的. 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.