Location of an NTC resistor in an electromagnet

• US 8,482,370 B2
• Filed: 05/18/2011
• Issued: 07/09/2013
• Est. Priority Date: 06/09/2010
• Status: Expired due to Fees

• Current Assignee: Pierburg GmbH (Rheinmetall AG)
• Original Assignee: Pierburg GmbH (Rheinmetall AG)
• Inventors: Zurke, Janusz
• Primary Examiner(s): BARRERA, RAMON M
• Application Number:
  US13/702,588
• Publication Number:
  US 20130076468A1
• Time in Patent Office: 783 Days
• Field of Search: 335/217, 335/299, 336/179, 336/192, 361/165
• US Class Current: 335/217
• CPC Class Codes: H01F 2007/062 Details of terminals or connectors for electromagnets
• CPC Class Codes: H01F 5/04 Arrangements of electric connections to coils, e.g. leads
• CPC Class Codes: H01F 7/06 Electromagnets; Actuators including electromagnets electric coils H01F5/00; devices for holding workpieces using electric force B23Q3/15; load-engaging elements for lifting articles electromagnetically B66C1/06; electromagnetic couplings F16D27/00; magnetic brakes F16D63/002; electromagnetically operated valves F16K11/24, F16K31/00; analysing materials by magnetic means G01N27/72, G01N27/80; electromagnets for winding mechanical clocks G04C1/02; electromagnetic relays H01H51/00; windings for salient poles of dynamo-electric machines H02K3/18; electromagnets for telegraphic communication H04L; for arc lamps H05B31/28

Abstract

An arrangement of a NTC resistor in an electromagnet includes an electromagnetic coil comprising a main winding and a shunt winding, a coil carrier configured to have the electromagnetic coil be wound thereon, a first contact terminal and a second contact terminal configured to supply a voltage, a NTC resistor, a first contact lead comprising a first contact lead end, a second contact lead comprising a second contact lead end, and a third contact lead. The first contact lead, the second contact lead and the third contact lead are configured to interconnect the first contact terminal, the second contact terminal, the main winding, the shunt winding, and the NTC resistor. A fixing element is configured to be elastically deformable and to exert a spring force so as to fix the NTC resistor between the first contact lead end and the second contact lead end.

Claims

1. An arrangement of a NTC resistor in an electromagnet, the arrangement comprising:

an electromagnetic coil comprising a main winding and a shunt winding;

a coil carrier configured to have the electromagnetic coil be wound thereon;

a first contact terminal and a second contact terminal, each of the first contact terminal and the second contact terminal being configured to supply a voltage;

a NTC resistor;

a first contact lead comprising a first contact lead end, a second contact lead comprising a second contact lead end, and a third contact lead, the first contact lead, the second contact lead and the third contact lead being configured to interconnect the first contact terminal, the second contact terminal, the main winding, the shunt winding, and the NTC resistor; and

a fixing element configured to be elastically deformable and to exert a spring force so as to fix the NTC resistor between the first contact lead end and the second contact lead end.

2. The arrangement as recited in claim 1, wherein the NTC resistor is clamped between the first contact lead end and the second contact lead end, and at least one of the first contact lead end and the second contact lead end is spring loaded.

3. The arrangement as recited in claim 2, wherein the coil carrier comprises a projection which is configured to serve as the fixing element and to bias the second contact lead end in a direction towards the first contact lead end.

4. The arrangement as recited in claim 3, wherein

the coil carrier comprises a hollow cylindrical body which extends axially, from which hollow cylindrical body a first annular plate and a second annular plate extend so as to delimit the electromagnetic coil in an axial direction, and from which the projection arranged at an axial end of the hollow cylindrical body extends in a radial direction,

the second contact lead end abuts against the projection between the projection and the first annular plate, and

the first contact lead end is arranged at the first annular plate between the projection and the first annular plate.

5. The arrangement as recited in claim 1, wherein at least one of the first contact lead end and the second contact lead end serves as a fixing element.

6. The arrangement as recited in claim 1, wherein the first contact lead, the second contact lead, the third contact lead, the first contact terminal and the second contact terminal are each punched/bent parts.