Resolver for an electric motor

Abstract

A resolver (1) for an electric machine, the resolver comprising a resolver stator (2) and a connection module (3), the resolver stator (2) and the connection module (3) being integrally formed, wherein the connection module (3) has a first plugging section (4) and a second plugging section (5), the first plugging section having at least one first contact pin (6) and at least one second contact pin (7), the second plugging section having at least one third contact pin (8), wherein the first contact pin (6) is electrically connected to the resolver stator (2), and the second contact pin (7) is electrically connected to the third contact pin (8).

Description

Technical Field

[0001] The present invention relates to a resolver for an electric motor, the resolver comprising a resolver stator and a connection module, wherein the resolver stator and the connection module are integrally formed, and wherein the connection module has a first plug section and a second plug section. Background Art

[0002] In an electric motor, especially a permanent magnet synchronous motor, a corresponding rotor position is required to adjust the electric motor. A resolver as an angle sensor is a possible technical concept to measure the rotor position angle required for the adjustment of the electric motor.

[0003] Therefore, a "Resolver" should be understood as a system for angle measurement, especially for measuring the angle between the stator and the rotor of an electric motor. Subsequently, variables of the electric motor such as the absolute position of the motor shaft can be determined based on the measured rotor position angle, thereby determining the absolute rotor position, rotational speed, and / or rotational direction of the electric motor.

[0004] The resolver has a rotatable resolver rotor and a fixed resolver stator, wherein the resolver rotor and the resolver stator are spaced apart from each other via a resolver air gap. The resolver rotor can be especially mounted on a rotatable member, such as the rotor of an electric motor. Various resolver types are known from the prior art, in which in principle a changing magnetic field is generated by means of at least one coil, and the magnetic field is detected by means of at least one additional coil according to the position or angular position to be measured.

[0005] In addition to detecting the rotor angular position of the rotor of the electric motor, the temperature in the electric motor, especially the temperature at the winding head of the stator winding of the stator, is an important variable to be detected in the electric motor.

[0006] All detected variables are usually detected via the power electronics of the electric motor. "Power electronics" should especially be understood as the components of the electric motor that can affect, especially switch, the current of the electric motor.

[0007] In order to be able to design an electric motor that is particularly efficient in terms of components and structural space, and to be able to ensure simple and cost-optimized maintenance in case of repair if necessary, it is desirable to combine as many electrical interfaces as possible on one component. Summary of the Invention

[0008] The object of the present invention is to provide an improved resolver for an electric motor, which is characterized in particular by an efficient construction in terms of components and structural space and has all electrical interfaces for detecting the rotor angular position and also for detecting the temperature of at least one stator winding head in a compact manner and method.

[0009] The described need can be met by the subject matter of the present invention. Advantageous embodiments of the present invention are described in the specification.

[0010] A resolver for an electric machine according to the present invention comprises a resolver stator and a connection module.

[0011] Corresponding to the present invention, the resolver stator and the connection module are integrally formed.

[0012] According to the present invention, the connection module has a first plug section and a second plug section.

[0013] According to the present invention, the first plug section has at least one first contact pin and at least one second contact pin. According to the present invention, the second plug section has at least one third contact pin. Corresponding to the present invention, the first contact pin is electrically connected to the resolver stator, and the second contact pin is electrically connected to the third contact pin.

[0014] In a particularly preferred embodiment variant, the first plug section can be connected to a first mating plug connector, and the second plug section can be connected to a second mating plug connector, wherein the first mating plug connector is electrically connected via a cable harness to a plug connector for connection to the power electronics of the electric machine, and wherein the second mating plug connector is electrically connected to at least one temperature sensor of the electric machine.

[0015] Preferably, the resolver stator and the connection module are integrally formed via a plastic potting.

[0016] By means of the configuration of the resolver according to the present invention, in particular by the configuration of the connection module, electrical collection points for recording the signals of the resolver and also for recording the temperature values on the side of the electric machine are presented. In this way, all this information on the signal lines directed towards the power electronics can be combined in the cable harness, and a resolver that is particularly efficient in terms of components and installation space can be created. In addition, through this bundling on the components, cost-optimized repairs can be ensured in the case of servicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is described below by way of example with reference to the accompanying drawings.

[0018] Figure 1 A schematic view showing the resolver.

[0019] Figure 2 Showing a cross-sectional view along section A-A taken from Figure 1 ...

[0020] Figure 3 Showing a side view of the resolver corresponding to Figure 1 ... SUMMARY OF THE INVENTION

[0022] Figures 1 to 3 Embodiments of the resolver 1 are shown in different views. However, it should be understood that the disclosed embodiments are merely exemplary, and additional embodiments may have different and alternative designs.

[0023] The resolver has a rotatable resolver rotor (not shown) and a fixed resolver stator 2. The resolver rotor and the resolver stator 2 are spaced apart from each other via a resolver air gap. The resolver rotor can in particular be mounted on a rotatable component, such as the rotor of an electric motor. The resolver stator 2 has a total of ten resolver stator windings 16. The resolver stator windings 16 are made of copper and are connected to each other.

[0024] The resolver 1 also has a connection module 3, wherein the connection module 3 and the resolver stator 2 are integrally formed, i.e., implemented via a plastic potting 14 ( Figure 1 ). The plastic potting 14 is implemented in an electrically insulating manner.

[0025] The connection module 3 has a first plug section 4 and a second plug section 5.

[0026] The first plug section 4 has a plurality of, i.e., in this embodiment five (not shown) first contact pins 6 and a plurality of second contact pins 7. The second plug section 5 has a plurality of, i.e., in this embodiment three (not shown) third contact pins 8. The first contact pins 6 are each electrically connected to the resolver stator 2, more precisely to the winding heads of the resolver stator. The second contact pins 7 are each electrically connected to the third contact pins 8, that is, the number of second contact pins 7 corresponds to the number of third contact pins 8, i.e., three second contact pins 7. The electrical connection between the second contact pins 7 and the third contact pins 8 is respectively realized via a substantially U-shaped conductor bow 15. The U-shaped conductor bow 15 is partially, i.e., except for its ends that respectively form the second contact pins 7 and the third contact pins 8, embedded in the plastic potting 14 ( Figure 2 ).

[0027] The first plug section 4 can be connected to a first mating plug 9, and the second plug section 5 can be connected to a second mating plug 10 ( Figures 1 to 3 ).

[0028] The first mating plug 9 is electrically connected to a plug 12 via a cable harness 11. The plug 12 can be connected to the power electronics of the electric motor ( Figure 1 、 Figure 3 ). In this embodiment, the second mating plug 10 is connected to two temperature sensors 13, which are used to detect the temperature in the electric motor, more precisely the temperature at the winding heads of the stator of the electric motor.

[0029] The cable harness 11 includes not only the signal lines of the resolver 1 but also the signal lines of the two temperature sensors 13.

[0030] List of Reference Signs

[0031] 1 Solver

[0032] 2 Solver Stator

[0033] 3 Connection Module

[0034] 4 First Plugging Section

[0035] 5 Second Plugging Section

[0036] 6 First Contact Pin

[0037] 7 Second Contact Pin

[0038] 8 Third Contact Pin

[0039] 9 First Mating Connector

[0040] 10 Second Mating Connector

[0041] 11 Cable Harness

[0042] 12 Connector

[0043] 13 Temperature Sensor

[0044] 14 Plastic Potting

[0045] 15 Conductor Bow

[0046] 16 Solver Stator Winding

Claims

1. A resolver (1) for an electric machine, the resolver comprising a resolver stator (2) and a connection module (3), wherein the resolver stator (2) and the connection module (3) are integrally formed, wherein the connection module (3) has a first plug-in section (4) and a second plug-in section (5), the first plug-in section having at least one first contact pin (6) and at least one second contact pin (7), the second plug-in section having at least one third contact pin (8), wherein the first contact pin (6) is electrically connected to the resolver stator (2), and the second contact pin (7) is electrically connected to the third contact pin (8).

2. The resolver (1) according to claim 1, characterized in that the first plug-in section (4) can be connected to a first mating plug connector (9), and the second plug-in section (5) can be connected to a second mating plug connector (10), wherein the first mating plug connector (9) is electrically connected via a cable harness (11) to a plug connector (12) for connection to the power electronics of the electric machine, and wherein the second mating plug connector (10) is electrically connected to at least one temperature sensor (13) of the electric machine.

3. The resolver (1) according to claim 1 or 2, characterized in that the resolver stator (2) and the connection module (3) are integrally formed via a plastic potting member (14).

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