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Your contact: +49 - 212 8804-0 • info@reo.de

CNW MD 835

Liquid-cooled 5-limb-motor choke

CNW MD 835

Unique Selling Point


  • Up to 40% weight saving
  • Up to 40% volume of construction savings
  • Limit the voltage rise to <500V / µs
  • Extended service life of electrical consumers
  • Low thermal heating
  • attenuation of common mode noise
  • High efficiency
  • Low noise
  • Production according to UL insulation system E251513 possible

Description


Common problems at the inverter - reduce weight and volume.

In addition to the typical problems at the inverter like voltage rise, symmetrical and asymmetrical current distortions, there is also the problem of common mode noise in multilevel inverters. In operation with common-mode interference occurs already at low currents to strong warming and in nominal operation can lead to the destruction of the choke.

The motor choke CNW 835 reduces the voltage rise and the voltage spikes between the conductors. Furthermore, the current is smoothed; losses and heating are minimized and the leakage current reduced. Longer motor cable lengths are possible. By limiting the rate of voltage rise, the motor insulation is protected and thus prolongs the life. The motor choke also attenuates the conducted interference in lower frequency range very good. The losses and the typical noise in the motor plate can be reduced. 

Voltage rises (<500V / us) will be reduced.

Increasing the service life of motors, reduction of edge steepness dv/dt to earth and between phases, reduce motor noise, current smoothing.

  • Rated voltage: U ≤ 3 x 500 V
  • Reduce the voltage rise dv / dt to < 500V/µs
  • Field frequency: 0 - 60 Hz
  • Drive switching frequency: up to 150 A >4kHz, from 150 A >1,5KHz
  • According to: EN 60289 / EN 61558
  • Test voltage: L-L 2500 V, AC/50Hz 60s; L-PE 2500 V, AC/50Hz 60s
  • insulation class: T50/F
  • Protection rating: IP00
  • Climatic categorie: DIN IEC 60068-1
  • Overload: 1,5 x INenn 1 min / h
  • Ambient temperature: 40 °C
  • Design: standing on foot angle

Typical applications

  • Smoothing of current and voltage in regenerative converters
  • Damping of common-mode interference

Technical Data


  • Nominal Voltage : 500 V
  • Rated current : 450 - 700 A
  • Inductance per strand : 0,02 - 0,042 mH

Circuit example

Your contact: +49 - 212 8804-0 • info@reo.de

CNW MD 835

Liquid-cooled 5-limb-motor choke

Technical data

Type

Rated voltage
[V]

Rated current
[A]

Inductance
[mH]

Losses
[W]

Copper
[kg]

Weight
[kg]

CNW MD 835 / 450

500

450

0,028

700

22

80

CNW MD 835 / 650

500

600

0,042

720

5

115

CNW MD 835 / 700

500

700

0,02

1120

5

125

 

 

Dimension drawings

Image 1

  Image 2

        

 

 

Dimensions

Type

Image

L

[mm]

B

[mm]

Hmax

[mm]

N1

[mm]

N2

[mm]

øD

[mm]

A1

[mm]

Connection

CNW MD 835/450

1

450

200

345

270

170

13

45

30 x 4

CNW MD 835/600

1

420

240

395

250

210

13

45

40 x 5

CNW MD 835/700

2

425

265

420

260

220

13

45

40 x 8