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Schenk eddy current dynamometers

In engine testing, eddy-current dynamometers are used as load units for the test specimen.

Features

The W-series dynamometer stands out because it has the following features:
  • High speeds for testing engines of passenger cars
  • High torques at very low speeds for commercial vehicle engines
  • Low inertia at high power
  • Suitable for two rotating directions
  • High measuring accuracy due to contact-free speed measurement via pulse generator as well as torque measurement via load cell
  • Easy maintenance due to Schenck patented flexures

Specifications

Torque/Speed Measuring System

Measuring accuracy speed

(rpm)

±1, not lower than 0.025 % of rating

Measuring accuracy torque

(%)

0.2, referring to rating

Control accuracy speed*

(rpm)

±10

Control accuracy torque*

(%)

±1, referring to rating

 

*referring to the system eddy-current dyno, power supply unit, test stand controller

Other specs

W 40

W 70

W 130

W 230

W 700

Power

(kW)

40

70

130

230

700

Rated torque

(Nm)

75

150

400

750

4000

Minimal speed for

(rpm)

2000

1350

1250

620

400

rated torque

Maximal speed

(rpm)

17000

13000

10000

7500

4000

Minimal speed for maximal power

(rpm)

5093

4457

3104

2928

1671

Moment of inertia

(kgm²)

0,01

0,035

0,14

0,53

7,9

Maximal share of mass to be coupled at nmax

(kg)

0,5

1,0

2,0

4,5

26,0

Maximum exciting

(A)

1,8

3,6

6,1

6,1

10,0

current

Color pendulum body

 

RAL 7032

Color frame

 

RAL 7022

Operating temperature

(°C)

0…+70 without cooling water addition

–25…+70 with antifreezer and power reduction of 10-20%

Transporting and storage temperature

(°C)

–50…+85

Cooling water supply

(m³/h)

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WS130

WS230F

WS400F

WS700

WS1200

W3S480

W3S700

Power

(kW)

130

230

400

700

1200

480

700

Rated torque

(Nm)

400

750

2000

4000

10000

750

2000

Minimal speed for rated torque

(rpm)

1250

620

620

400

340

3000

1400

Maximal speed

(rpm)

13000

10000

7500

5500

4000

13000

10000

Minimal speed for maximal power

(rpm)

3104

2928

1910

1671

1146

6112

3443

Moment of inertia

(kgm²)

0,14

0,53

2,0

8,0

33,0

0,46

1,6

Maximal share of mass to be coupled at nmax

(kg)

2,0

4,5

10,0

26,0

63,0

2,0

4,5

Maximum exiting current

(A)

6,1

6,1

5,5

10,0

13,0

18,0

18,0

Weight

(kg)

276

480

820

1890

3990

860

1550

Color pendulum body

 

RAL 7032

Color frame

 

RAL 7022

Operating temperature

(°C)

0…+70 without cooling water addition

0…+60

0…+70

–25…+70 with antifreeze and power reduction of 10-20%

Transporting and storage temperature

(°C)

–50…+85

Cooling water supply

(m³/h)

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