What is the Hance DE series power range?

The stated series power range is 20 kW to 720 kW.

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Eddy current dynamometer

Q: Does the DE series require cooling water?

Yes. Cooling water removes the heat produced as mechanical engine power is absorbed.

Hance DE series eddy current dynamometers range in power from 20KW to 720KW. Suitable for testing automotive engines, they are compatible with Hance control instruments and meet Euro III standards. Reliable quality ensures long-term, trouble-free operation. Designed with low inertia and water cooling, these eddy current dynamometers are intended to provide customers with an accurate, durable, and reusable dynamometer, suitable for use alongside water gate dynamometers. Eddy current dynamometers generate braking torque using the principle of eddy currents (induced by eddy currents on a rotating disk placed in a magnetic field).

Water-Cooled Engine Power Absorption

DE Series Eddy Current Dynamometer

A low-inertia, water-cooled dynamometer range for automotive engine testing, combining controllable eddy-current braking with integrated torque and speed measurement.

20–720 kWSeries power range

Low inertiaResponsive loading

Water cooledHeat management

Hance DE series water-cooled eddy current dynamometer

Designed for accurate, durable and repeatable automotive engine testing.

Controlled non-contact braking

Responsive engine loading with a rugged absorber

Hance DE series eddy current dynamometers use an electromagnetic field to generate braking torque on a rotating element. The 20–720 kW range is designed for automotive engine applications and integrates with Hance control instrumentation.

01 / RESPONSE

Low-inertia design

Low rotating inertia supports responsive load changes and practical control during engine performance testing.

02 / COOLING

Water-cooled absorption

Cooling water removes the heat produced as mechanical engine power is absorbed by the dynamometer.

03 / MEASUREMENT

Torque and RPM feedback

A strain-based load unit measures torque while a magnetic pickup and 60-tooth gear provide rotational-speed measurement.

04 / DURABILITY

Built for harsh test cells

Rugged absorber construction and nickel-plated water-contact components support long-term service.

Eddy-current principle

How braking torque is generated

The dynamometer creates load without mechanical friction surfaces being used as the primary braking mechanism. Electrical excitation controls the magnetic field and therefore the absorbed torque.

01Rotate the absorber

The connected engine drives the dynamometer rotor through the test-cell driveline.

02Apply a magnetic field

The excitation system establishes the field required to induce eddy currents in the rotating assembly.

03Generate braking torque

The induced currents oppose rotation, creating a controllable load on the engine under test.

04Reject absorbed heat

The absorbed mechanical energy becomes heat and is carried away by the cooling-water circuit.

Measurement hardware

Integrated feedback for dynamometer control

The DE series combines the absorber with the fundamental sensors needed to measure the engine operating point and provide feedback to the control system.

Multiple Hance eddy current dynamometers in the manufacturing facility

Standard measurement elements

Strain-based load unit for torque measurement
Variable-reluctance magnetic pickup sensor
60-tooth speed gear for RPM measurement
Interface compatibility with Hance control instruments
Water-cooled power absorption system
Nickel-plated key components exposed to cooling water

Range overview

20–720 kW for automotive engine testing

The DE series spans a broad power range for different automotive-engine test programs. Final model selection depends on the complete torque-speed envelope, duty cycle, cooling-water conditions and required control response.

20 kWLower end of the supplied DE series power range.

720 kWUpper end of the supplied DE series power range.

Euro IIISuitable for engine test programs aligned with the stated Euro III requirements.

Typical applications

Where eddy current dynamometers fit best

The combination of electronic load control, low inertia and water cooling makes the DE series a practical absorber for repeatable engine testing where motoring capability is not required.

Automotive engine performanceMeasure torque, speed and power across controlled steady-state or sweep-style operating points.

Development and calibrationApply repeatable loading while the wider test system records engine and environmental parameters.

Production and quality checksSupport repeatable pass/fail and performance-verification procedures configured by the control system.

Durability-oriented testingRugged water-cooled construction is designed for demanding test-cell environments and extended service.

Selection guidance

Define the complete test envelope

Rated power is only one selection input. Correct matching protects the dynamometer and ensures that required engine operating points remain inside its usable absorption curve.

Power, torque and speedProvide continuous and peak values across the full engine operating range.

Test cycle and durationDefine steady-state, sweep, transient or endurance operation and the expected duty cycle.

Cooling-water conditionsConfirm available inlet temperature, flow, pressure, water quality and heat-rejection capacity.

Mechanical and control interfacesConfirm rotation direction, coupling, shaft height, base arrangement and Hance controller integration.

Buyer questions

Eddy current dynamometer FAQ

Key points for understanding the technology and preparing a model-selection request.

How does an eddy current dynamometer create load?

A magnetic field induces eddy currents in the rotating absorber. Their opposing electromagnetic effect creates controllable braking torque.

Does the DE series require cooling water?

Yes. The supplied product information identifies the DE series as water cooled because absorbed engine power is converted into heat that must be removed.

What is the power range of the Hance DE series?

The stated series range is 20 kW to 720 kW. The correct model must also be checked against torque, speed and duty-cycle requirements.

How are torque and speed measured?

Torque is measured by a strain-based load unit. Speed is measured using a variable-reluctance magnetic pickup and a 60-tooth gear.

Can an eddy current dynamometer motor the engine?

An eddy current dynamometer is primarily a power-absorbing device. If active motoring or four-quadrant operation is required, an AC dynamometer should be evaluated.

Complete the test cell

Related Hance systems

Connect the absorber with the appropriate control, cooling-water and alternative dynamometer technology.

Match the DE series to the full torque-speed curve

Share the engine rating, operating range, duty cycle, cooling-water conditions and control requirements with Hance.

Request Eddy Current Dyno Selection

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