Electromagnetic Adjusting Device

Abstract

An electromagnetic adjusting device having a first, second and third plug contacts for operating the adjusting device on an operating voltage source having a first and second voltage pole. The device can include an actuator coupled to the plug contacts. The actuator can have a magnet coil with a first terminal connected to the first plug contact, a second terminal connected to the second plug contact, where either the first or the second plug contact is connected to the first voltage pole. The magnet coil can also have a first transistor with a first control electrode connecting the first terminal to the third plug contact, a second transistor having a second control electrode connecting the second terminal to the third plug contact, a first resistor connecting the first control electrode to the second plug contact and a second resistor connecting the second control electrode to the first plug contact.

Claims

1. An electromagnetic adjusting device comprising: an actuator comprising a single magnet coil; first, second and third plug contacts for operating the adjusting device on an operating voltage source having a first and second voltage pole; wherein a first terminal of the magnet coil is connected to the first plug contact; wherein a second terminal of the magnet coil is connected to the second plug contact, wherein either the first or the second plug contact is connected to the first voltage pole; wherein a first transistor element having a first control electrode connects the first terminal of the magnet coil the third plug contact; wherein a second transistor element having a second control electrode connects the second terminal of the magnet coil the third plug contact; wherein the first control electrode of the first transistor element is connected via a first resistance element to the second plug contact; and wherein the second control electrode of the second transistor element is connected via a second resistance element to the first plug contact.

2. The electromagnetic adjusting device according to claim 1, wherein the first terminal of the magnet coil is connected via a first reverse polarity protection diode to the first plug contact; and wherein the second terminal of the magnet coil is connected via a second reverse polarity protection diode to the second plug contact.

3. The electromagnetic adjusting device according to claim 1, configured for use with a camshaft adjustment of an internal combustion engine of a vehicle.

4. An electromagnetic adjusting device comprising: first, second and third plug contacts for an actuator with a single magnet coil, the actuator for operating the adjusting device of a camshaft of an internal combustion engine of a vehicle on an operating voltage source having a first and second voltage pole; wherein a first terminal of the magnet coil is connected to the first plug contact; wherein a second terminal of the magnet coil is connected to the second plug contact; wherein either the first or the second plug contact is connected to the first voltage pole; wherein a first transistor element having a first control electrode connects the first terminal of the magnet coil to the third plug contact; wherein a second transistor element having a second control electrode connects the second terminal of the magnet coil to the third plug contact; wherein the first control electrode of the first transistor element is connected via a first resistance element to the second plug contact; and wherein the second control electrode of the second transistor element is connected via a second resistance element to the first plug contact.

5. The electromagnetic adjusting device according to claim 4, wherein the first terminal of the magnet coil is connected via a first reverse polarity protection diode to the first plug contact; and wherein the second terminal of the magnet coil is connected via a second reverse polarity protection diode to the second plug contact.

6. An electromagnetic adjusting device, comprising: a plurality of plug contacts for operating the adjusting device of a vehicle camshaft on an operating voltage source having a first and second voltage pole; an actuator coupled to a first, second and third plug contact of the plurality of plug contacts, the actuator having a magnet coil, the magnet coil comprising: a first terminal connected to the first plug contact; a second terminal connected to the second plug contact, wherein either the first or the second plug contact is connected to the first voltage pole; a first transistor with a first control electrode connecting the first terminal of the magnet coil to the third plug contact; a second transistor having a second control electrode connecting the second terminal of the magnet coil to the third plug contact; a first resistor connecting the first control electrode to the second plug contact; a second resistor connecting the second control electrode to the first plug contact.

7. The electromagnetic adjusting device according to claim 6, further comprising: a first reverse polarity protection diode connecting the first terminal of the magnet coil to the first plug contact; and a second reverse polarity protection diode connecting the second terminal of the magnet coil to the second plug contact.

Description

[0020] The invention is described below in detail according to an embodiment with reference to the accompanying figures in which

[0021] FIG. 1 is a diagrammatic view of an electromagnetic adjusting device having a magnet coil which is interconnected in an H circuit according to the invention,

[0022] FIG. 2 is a diagrammatic view of an electromagnetic adjusting device for a camshaft phaser of an internal combustion engine having a single magnet coil according to the prior art and

[0023] FIG. 3 is a diagrammatic view of an electromagnetic adjusting device for a camshaft phaser of an internal combustion engine having two magnet coils according to the prior art.

[0024] The two FIGS. 2 and 3 have already been described in the introduction to the description; reference is made hereto, where appropriate.

[0025] FIG. 1 shows according to FIG. 2 an electromagnetic adjusting device 1 for a hydraulic camshaft phaser. This electromagnetic adjusting device 1 comprises an actuator having a single magnet coil M comprising a first terminal A and a second terminal B. Said magnet coil M is interconnected in an H circuit and connected to three plug contacts K21, K22 and K23 which are forming a plug 2 with other plug contacts, where appropriate. The difference to the electromagnetic adjusting device 10 according to FIG. 2 is that there the magnet coil M is interconnected with only two plug contacts K1 and K2 whereas in the case of the magnet coil according to FIG. 1 three plug contacts K21, K22 and K23 are available for the magnet coil M.

[0026] According to FIG. 1 the first terminal A of the magnet coil M is connected via a first reverse polarity protection diode D1 to the first plug contact K21 whereas the second terminal B of the magnet coil B is connected via a second reverse polarity protection diode to the second plug contact K22.

[0027] Furthermore the H circuit comprises a first transistor element T1 as well as a second transistor element T2, wherein the first transistor element T1 connects the first terminal A of the magnet coil M to the third plug contact K23 via its collector-emitter path. In the same way the second transistor element T2 is connecting the second terminal B of the magnet coil M to the third plug contact K23, the collector K of the second transistor element T2 being connected to the second terminal B of the magnet coil M and the emitter B of the second transistor element T2 being connected to the third plug contact K23.

[0028] The base electrode B2 of the second transistor element 12 is connected via a first resistance element R1 to the first plug contact K21, whereas the base electrode B1 of the first transistor element T1 is wired via a second resistance element R2 to the second plug contact K22.

[0029] FIG. 1 also displays diagrammatically an operating voltage source 3 having a first voltage pole 3.1, the positive pole, and a second voltage pole 3.2, the negative pole. The positive pole 3.1 is connected either to the first plug contact K21 or to the second plug contact K22, whereas the third plug contact K23 is connected to the negative pole 3.2.

[0030] If the first plug contact K21 is applied to the positive pole 3.1 of the operating voltage source 3, the magnet coil M is receives a flow of current in the direction of the arrow P1. If, however, the second plug contact K22 is applied to the positive pole 3.1 of the operating voltage source 3 the magnet coil P1 receives a flow of current in the inverse direction, that is, in the direction of the arrow P2. That way an anchor of the actuator can be moved by means of the magnet coil M into opposite directions.