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Need
Status: Need is Open

Holding Magnet for Undervoltage Release

Request Number

NG_2017_0013_N_201
Point of Contact
Description

Siemens is seeking a holding magnet, which trips/releases a fuse when a certain voltage is undercuted. Specifications for one variant of the holding magnet and further variants in the portfolio are in the voltage range between 12Vdc - 250Vdc, as well as 24Vac - 480Vac.

Background

In the current setup, the standard deviation of the lifting force is too high which can create issues in production. Siemens is seeking a holding magnet that can perform within a defined tolerance of ± 0,5N and a defined force at the specific release voltage. The holding magnet needs to be durable (thermal) as well.

Key success Criteria

Special challenge: Small overall size, the need for a high force within a small tolerance.

Electrical requirements for new holding magnet:

Test voltage:                           70 Vdc…90Vdc

Max. Power dissipation:       325mW @ test voltage

Force:                                       8N ± 0.5N @ test voltage

Windings:                                 freely selectable regarding requirements above

Wire diameter:                        freely selectable regarding requirements above

Resistance:                              freely selectable regarding requirements above

Requirements for new circuit (if necessary):

 

 

 

Serial resistor:                         need to be adjusted for new coil

Capacitor:                                 need to be adjusted for new coil

Requirements device:

Nominal Voltage:                    208…230VAC

Trip voltage:                            109VAC (50% of nominal voltage)

Force:                                       8N ± 0.5N @ trip voltage

Max. power:                            <2VA @ 1.1 * 230 VAC; 115°C

Max. ambient temperature:    115°C

Surge impulse:                         2kV (IEC 61000-4-5; power port; line-to-line)

Possible Approaches

Siemens is open to all solutions that meet the success criteria. Producing the holding magnet for serial production is essential.

Due Date
Nov 8
Items to be submitted

We are looking for concise, non-confidential proposals. The proposal should:

  • Describe the technical approach
  • Provide information on the performance of the technology (if available)
  • Include a description of the responding organisation or team and their experience.

To Respond, please use the Respond button located at the end of this page.

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Gallery Moderator(s)
Dezarae Carver
Request Number
NG_2017_0013_N_201
Preferred Collaboration Types
Area of Interest