阅读说明：本技术 一种电气设备 (Electrical equipment ) 是由 宋贺 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种电气设备,包括固定部分；旋转支撑件,被构造为相对于固定部分旋转；旋转装置所承载的至少一件电气设备；以及供电装置,其被配置为向电气设备供应电能。该电源装置包括异步电机和励磁设备,该异步电机包括固定到固定部分的定子和由旋转支撑件承载的转子。该定子包括一个电电路,其包括被配置成在其中的打开状态之间进行切换的至少一个开关电电路是打开和关闭状态,其中电电路闭合。转子包括连接到电气设备的至少一个绕组。激励装置被配置成提供无功电流到电定子或转子的绕组电路。(The invention discloses an electrical apparatus, comprising a fixed part; a rotary support configured to rotate relative to the fixed portion; at least one piece of electrical equipment carried by the rotating device; and a power supply device configured to supply electric energy to the electric apparatus. The power supply apparatus comprises an asynchronous machine comprising a stator fixed to a fixed part and a rotor carried by a rotary support, and an excitation device. The stator includes an electrical circuit including at least one switching circuit configured to switch between an open state therein and an open and closed state, wherein the electrical circuit is closed. The rotor includes at least one winding connected to the electrical device. The excitation device is configured to provide a reactive current to a winding circuit of the electrical stator or rotor.)

1. An electrical device, comprising: a fixed portion; a first rotary support configured to rotate in a first rotational direction relative to the stationary component, the first rotary support carrying a first set of blades; a second rotary support configured to be driven in rotation in a second direction of rotation with respect to the fixed part, the second direction of rotation being opposite to the first direction of rotation, the second rotary support carrying a second set of blades, the first rotary support carrying a first electrical device; a second electrical device carried by the second rotary support; a first self-excited asynchronous motor configured to supply electric energy to a first electrical device, and comprising: a first stator fixed to the fixed portion, a first rotor supported by the first rotary support, and a first excitation device, the first stator not being electrically connected to the dedicated power source, a first circuit including a first switch configured to switch between an open state in which the first circuit is open and a closed state in which the first circuit is closed; and a first winding connected to the first electrical device, wherein the first electrical circuit is integrated into a first stator of the first self-excited asynchronous machine, and wherein the first winding forms part of a first rotor of the first self-excited asynchronous machine; and a second self-excited asynchronous motor configured to supply electric energy to a second electric device, and including: a second stator fixed to the fixed portion, a second rotor supported by the second rotary support, and a second excitation device, the second stator not being electrically connected to the dedicated power supply, a second circuit including a second switch configured to switch between an open state in which the second circuit is open and a closed state in which the second circuit is closed; and a second winding connected to the second electrical device, wherein the second circuit is integrated into a second stator of the second self-excited asynchronous machine, and wherein the second winding forms part of a second rotor of the second self-excited asynchronous machine, wherein the first rotor of the first self-excited asynchronous motor is arranged radially outside the second rotor of the second self-excited asynchronous motor.

2. The apparatus of claim 1, wherein the first excitation device is connected to the first circuit of the first stator.

3. The device of claim 1, further comprising an electronic command unit configured to command switching of the first switch and to estimate the current circulating in the first electrical device with respect to a measurement signal representative of the current circulating in the first electrical circuit.

4. The device of claim 3, wherein the electronic command unit is powered by a device configured to draw power from the first stator of the first self-excited asynchronous motor.

5. The apparatus of claim 1, further comprising: means for assisting start-up configured to circulate current in the first circuit when the first switch is in a closed state.

6. An aircraft engine comprising: the apparatus of claim 1; a main shaft; and a power gearbox configured to convert rotation of the main shaft into rotation of the first rotary support in a first rotational direction and rotation of the second rotary support in a second rotational direction.

7. The aircraft engine of claim 6, wherein said first electrical device comprises a de-icing assembly comprising a resistor integrated into said first set of blades.

8. The aircraft engine of claim 6, wherein said second electrical device comprises a de-icing assembly comprising a resistor integrated into said second set of blades.

9. The apparatus of claim 1, wherein the apparatus is free of a brush device and free of a transformer.

10. The apparatus of claim 1, wherein the first excitation device comprises at least one capacitor connected to the first circuit of the first stator or the first winding of the first rotor.

Technical Field

The invention relates to the field of electrical equipment, in particular to the supply of electrical energy to electrical equipment carried by a rotary support.

Background

The present invention relates to the supply of electrical energy to electrical equipment carried by a rotary support. In particular, the invention relates to the supply of electrical energy to electrical equipment carried by the rotor of an aircraft engine.

It is known to equip blades carried by the rotor of an aircraft engine with deicing devices comprising heating resistances intended to prevent icing. In order to supply the de-icing device with electricity, it is necessary to transmit electrical energy to the rotor.

For this purpose, brush devices are generally used. However, brush devices are generally not highly reliable and are subject to rapid wear. Therefore, they require regular maintenance. In addition, they are often heavy and cumbersome and may cause compatibility problems with the surrounding oil.

It is also known to transfer electrical energy to the rotor via a rotary transformer. When the power to be transmitted is high, the rotary transformer is often a bulky device. In addition, it must be supplied by a power source whose power corresponds to the power required by the rotor. Therefore, a power converter and an energy source sized to deliver high power are needed.

In addition, asynchronous machines are known that can be used as self-excited asynchronous generators. An asynchronous machine generally comprises: a rotor comprising a closed circuit (squirrel cage rotor or windings connected in a closed circuit); and a stator including at least one winding connectable to a load. In order to allow its use as a self-excited asynchronous generator, a capacitor bank for providing reactive power is connected to the asynchronous machine.

When the rotor is driven in rotation, and if the capacity value of the capacitor bank is suitably selected with respect to the load and the rotational speed, the asynchronous machine can be used as a generator and supply electrical energy to the stator load.

Disclosure of Invention

Drawings

FIG. 1 is a perspective view of an aircraft engine according to one embodiment of the invention;

FIG. 2 is a partial cross-sectional view of the engine of FIG. 1;

FIG. 3 is a schematic diagram of a device for supplying power to the engine of FIG. 1;

FIG. 4 is an equivalent electrical diagram of one phase of the power supply apparatus of FIG. 3;

Fig. 5 and 6 are views similar to fig. 1 to 3.

Detailed Description