Systems and methods for operating an electromagnetic actuator

• US 7,392,491 B2
• Filed: 07/21/2005
• Issued: 06/24/2008
• Est. Priority Date: 03/14/2003
• Status: Expired due to Fees

• Current Assignee: Combustion Dynamics Corporation
• Original Assignee: Combustion Dynamics Corporation
• Inventors: Ismailov, Murad M.
• Primary Examiner(s): Siek; Vuthe
• Application Number:
  US11/187,385
• Publication Number:
  US 20050279867A1
• Time in Patent Office: 1,069 Days
• Field of Search: 716/1, 703/2, 703/14, 123/90.11, 318254-255, 360/78.04, 360/69, 360/78.12, 250/505.1, 250/515.1, 251257-263, 251/274, 239/1, 239/5
• US Class Current: 716/106
• CPC Class Codes: F02D 2041/2013 by using a boost voltage source
• CPC Class Codes: F02D 2041/2072 Bridge circuits, i.e. the load being placed in the diagonal of a bridge to be controlled in both directions
• CPC Class Codes: F02D 2041/2079 the circuit having several coils acting on the same anchor
• CPC Class Codes: F02D 2041/288 for performing a transformation into the frequency domain, e.g. Fourier transformation
• CPC Class Codes: F02D 41/20 Output circuits, e.g. for controlling currents in command coils
• CPC Class Codes: F02D 41/402 Multiple injections
• CPC Class Codes: F02M 2200/24 Fuel-injection apparatus with sensors
• CPC Class Codes: F02M 45/08 Injectors peculiar thereto
• CPC Class Codes: F02M 51/061 using electromagnetic operating means
• CPC Class Codes: F02M 57/02 Injectors structurally combined with fuel-injection pumps
• CPC Class Codes: F02M 59/366 Valves being actuated electrically
• CPC Class Codes: H01F 2007/1855 using a stored table to deduce one variable from another
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

One embodiment of the present invention relates to a method for constructing a circuit for controlling an electromagnetic actuator. Another embodiment of the present invention relates to a method for designing a circuit for controlling an electromagnetic actuator.

Claims

1. A method for constructing a circuit for controlling an electromagnetic actuator, which electromagnetic actuator includes a coil having associated therewith a resistance R₁ and an inductance L₁, comprising:

modeling the electromagnetic actuator with an equation;

calculating at least one resistance R_2j and at least one inductance L_2j, each of which is associated with at least one theoretical coil electrically connected to and physically remote from the electromagnetic actuator, wherein the resistance R_2j and the inductance L_2j are calculated by satisfying the equation using at least the function;

2. The method of claim 1, wherein j=1 and the resistance R_2j and the inductance L_2j are calculated by satisfying the equation using at least the function:

3. The method of claim 1, wherein the equation is a differential equation.

4. The method of claim 3, wherein the equation is a second-order non-homogeneous ordinary differential equation.

5. The method of claim 1, wherein the current supply means includes j number of coils, each having a resistance equal to substantially the calculated resistance R_2j and each having an inductance equal to substantially the calculated inductance L_2j.

6. The method of claim 1, wherein the current supply means includes a coil having substantially the sum of each calculated resistance R_2j and substantially the sum of each calculated inductance L_2j.

7. The method of claim 1, wherein the current supply means includes computer code.

8. The method of claim 7, wherein the computer code includes at least one of:

(a) software; and

(b) firmware.

9. The method of claim 1, further comprising determining the resistance R₁ and the inductance L₁.

10. The method of claim 9, wherein the step of determining the resistance R₁ and the inductance L₁ comprises measuring the resistance R₁ and the inductance L₁.

11. The method of claim 1, wherein each resistance R_2j and each inductance L_2j is calculated by selecting a desired value for one and determining a value for the other which satisfies the equality ω

_22j equals 2π

R_2j/L_2j.

12. The method of claim 1, wherein each resistance R_2j and each inductance L_2j is calculated based upon a desired time-dependent action of the electromagnetic actuator.

13. The method of claim 1, wherein each resistance R_2j and each inductance L_2j is calculated based upon a desired frequency-dependent action of the electromagnetic actuator.

14. A method for designing a circuit for controlling an electromagnetic actuator, which electromagnetic actuator includes a coil having associated therewith a resistance R₁ and an inductance L₁, comprising:

modeling the electromagnetic actuator with an equation; and

calculating at least one resistance R_2j and at least one inductance L_2j, each of which is associated with at least one theoretical coil electrically connected to and physically remote from the electromagnetic actuator, wherein the resistance R_2j and the inductance L_2j are calculated by satisfying the equation using at least the function;

15. The method of claim 14, wherein j=1 and the resistance R_2j and the inductance L_2j are calculated by satisfying the equation using at least the function:

16. The method of claim 14, wherein the equation is a differential equation.

17. The method of claim 16, wherein the equation is a second-order non-homogeneous ordinary differential equation.

18. The method of claim 14, further comprising determining the resistance R₁ and the inductance L₁.

19. The method of claim 18, wherein the step of determining the resistance R₁ and the inductance L₁ comprises measuring the resistance R₁ and the inductance L₁.

20. The method of claim 14, wherein each resistance R_2j and each inductance L_2j is calculated by selecting a desired value for one and determining a value for the other which satisfies the equality ω

_22j equals 2π

R_2j/L_2j.

21. The method of claim 14, wherein each resistance R_2j and each inductance L_2j is calculated based upon a desired time-dependent action of the electromagnetic actuator.

22. The method of claim 14, wherein each resistance R_2j and each inductance L_2j is calculated based upon a desired frequency-dependent action of the electromagnetic actuator.