PROTECTIVE MODULE AND METHOD AGAINST TORQUE PEAKS BETWEEN A MOTOR AND AN ELECTRIC MACHINE

• US 20150084565A1
• Filed: 09/24/2014
• Published: 03/26/2015
• Est. Priority Date: 09/26/2013
• Status: Active Grant

• Current Assignee: Dassault Aviation (Groupe Industriel Marcel Dassault)
• Original Assignee: Dassault Aviation (Groupe Industriel Marcel Dassault)
• Inventors: Le Peuvedic, Jean-Marc
• Granted Patent: US 9,444,391 B2
• Time in Patent Office: Days
• US Class Current: 318/434
• CPC Class Codes: F01D 15/10 Adaptations for driving, or combinations with, electric generators
• CPC Class Codes: F02C 7/32 Arrangement, mounting, or driving, of auxiliaries
• CPC Class Codes: F05D 2220/76 an electrical generator
• CPC Class Codes: F05D 2270/335 Output power or torque
• CPC Class Codes: H02J 2310/44 for aircrafts
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 7/1438 in combination with power supplies for loads other than batteries
• CPC Class Codes: H02P 29/02 Providing protection against overload without automatic interruption of supply protection against faults of stepper motors H02P8/36
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 30/12 Remote or cooperative charging

Abstract

A protective method is provided against torque peaks between a motor adapted for setting a shaft of the motor into rotation and an electric source adapted for electrically powering an electric assembly and including a fixed section and a rotating adapted for rotating with the shaft. The method includes a step for controlling the operation of the electric source forcing the rotary movement of the rotating section with the shaft to observe an instruction relating to the torque of the rotating section applied to the shaft of the motor, the instruction being adapted depending on at least one element characterizing a current operating state of the motor.

Claims

1. A protective method against torque peaks in a system comprising an electric assembly including one or more electric loads, a motor adapted for setting a shaft of the motor into rotation, an electric source comprising at least one electric machine and adapted for electrically powering the electric assembly, the electric source including a fixed section and a rotating section adapted for rotating with the shaft, the method comprising:

controlling the operation of the electric source forcing the rotary movement of the rotating section with the shaft to observe an instruction relating to a torque of the rotating section applied to the shaft of the motor, the instruction being adapted depending on at least one element characterizing a current operating state of the motor.

2. The protective method against torque peaks as recited in claim 1 wherein the instruction depends on at least one element characterizing a current operating state of the motor from amoung a speed of rotation of the shaft of the motor, an air compression rate in the motor, an indicator of the capability of accepting a power withdrawal calculated by the motor, a fuel flow rate relating to the motor and a withdrawn torque variation threshold calculated by the motor.

3. The protective method against torque peaks as recited in claim 1 wherein the instruction sets at least one threshold value from among a maximum torque threshold value and a minimum torque threshold value.

4. The protective method against torque peaks as recited in claim 1 wherein the instruction sets at least one threshold value from among a maximum torque variation rate threshold value and a minimum torque variation rate threshold value.

5. The protective method against torque peaks as recited in claim 1 wherein the controlling includes determining an electric signal to be applied to the rotating section or to the fixed section of the electric source, and applying the electric signal to the rotating or fixed section.

6. The protective method against torque peaks as recited in claim 5 wherein the electric signal is an alternating voltage applied by an active rectifier.

7. The protective method against torque peaks as recited in claim 5 wherein the controlling includes determining at least one of a phase and a amplitude of the electric signal.

8. The protective method against torque peaks as recited in claim 1 wherein a plurality of pieces of equipment from among the electric source and the loads is controlled so that each observes a curve relating the voltage on the terminals of the respective piece of equipment to the current flowing through the respective piece of equipment, having a first area with a current plateau for voltage values in a range comprising a minimum operating voltage, a second area in which the current decreases when the voltage increases beyond the range, and a third area with a current plateau for voltage values beyond the second area.

9. The protective method against torque peaks as recited in claim 1 wherein the motor is a turbomachine.

10. A protective module against torque peaks intended for a system comprising an electric assembly including one or more electric loads, a motor adapted for setting a shaft of the motor into rotation, an electric source comprising at least one electric machine and adapted for electrically powering the electric assembly, the electric source including a fixed section and a rotating section adapted for rotating interdependently with the shaft, the protective module comprising:

a controller adapted for controlling the operation of the electric source by forcing the rotary movement of the rotating section with the shaft to observe an instruction relating to the torque of the rotating section applied to the shaft of the motor, the controller being adapted for determining an element characterizing a current operating state of the motor, and for further adapting the instruction depending on at least the element.

11. The protective module against torque peaks as recited in claim 10 wherein the instruction depends on at least one element characterizing a current operating state of the motor from among the speed of rotation of the shaft of the motor, an air compression rate in the motor, an indicator of the capability of accepting a calculated power withdrawal by the motor, a fuel flow rate relating to the motor and a calculated withdrawn torque variation threshold by the motor.

12. The protective module against torque peaks as recited in claim 10 wherein the instruction sets at least one threshold value from among a maximum torque threshold value and a minimum torque threshold value.

13. The protective module against torque peaks as recited in claim 10 wherein the instruction sets at least one threshold value from among a maximum torque variation rate threshold value and a minimum torque variation rate threshold value.

14. The protective module against torque peaks as recited in claim 10 wherein the controller is adapted such that the controlling comprises determining an electric signal to be applied to the rotating section or to the fixed section of the electric source and comprises applying the signal to the rotating or fixed section.

15. The protective module against torque peaks as recited in claim 14 wherein the controller is adapted such that the controlling comprises determining definition data for an alternating voltage to be applied to the rotating section or to the fixed section of the electric source and providing the data to a rectifier of the electric source with view to applying the alternating voltage, by the rectifier, to the rotating section or to the fixed section of the electric source, the electric signal being an alternating voltage applied by an active rectifier.

16. The protective module against torque peaks as recited in claim 14 wherein the controller is adapted such that the controlling comprises determining at least one of a phase and of an amplitude of the electric signal.

17. An aircraft including a system comprising:

an electric assembly including one or more electric loads;

a turbomachine adapted for setting a shaft into rotation;

an electric source comprising at least one electric machine, the electric source being adapted for electrically powering the electric assembly, the electric source including a fixed section and a rotating section adapted for interdependently rotating with the shaft; and

the protective module against torque peaks as recited in claim 10.