PREDICTIVE PULSE WIDTH MODULATION FOR AN OPEN DELTA H-BRIDGE DRIVEN HIGH EFFICIENCY IRONLESS PERMANENT MAGNET MACHINE

• US 20100201455A1
• Filed: 09/23/2009
• Published: 08/12/2010
• Est. Priority Date: 09/23/2008
• Status: Active Grant

• Current Assignee: Aerovironment
• Original Assignee: Aerovironment
• Inventors: Daboussi, Zaher Abdallah
• Granted Patent: US 8,242,731 B2
• Time in Patent Office: Days
• US Class Current: 332/109
• CPC Class Codes: F02D 2041/2027 Control of the current by pulse width modulation or duty cycle control
• CPC Class Codes: F02D 2041/2051 using voltage control
• CPC Class Codes: F02D 2041/2058 using information of the actual current value
• CPC Class Codes: F02D 41/20 Output circuits, e.g. for controlling currents in command coils
• CPC Class Codes: G05B 11/28 using pulse-height modulation; using pulse-width modulation
• CPC Class Codes: H02P 23/14 Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage

Abstract

Embodiments of the present method and system permit an effective method for determining the optimum selection of pulse width modulation polarity and type including determining machine parameters, inputting the machine parameters into a predicted duty cycle module, determining the optimum polarity of the pulse width modulation for a predicted duty cycle based on a pulse width modulation generation algorithm, and determining the optimum type of the pulse width modulation for a predicted duty cycle based on the pulse width modulation generation algorithm.

Claims

1. A method for determining a predictive duty cycle that is able to determine the magnitude and pulse width of an H-bridge pulse width modulation that is used to drive a machine motor, comprising:

determining one or more machine parameters;

inputting the machine parameters into a predicted duty cycle module;

determining the optimum polarity of the pulse width modulation for a predicted duty cycle based on a pulse width modulation generation algorithm; and

determining the optimum type of the pulse width modulation for a predicted duty cycle based on the pulse width modulation generation algorithm.

2. The computer-implemented method according to claim 1, wherein the pulse width modulation generation algorithm is

3. The method according to claim 1, wherein the type of the predicted duty cycle is one of unipolar or bipolar.

4. A system for determining a predictive duty cycle that is able to determine the magnitude and pulse width of an H-bridge pulse width modulation that is used to drive a machine motor, comprising:

means for determining one or more machine parameters;

means for inputting the machine parameters into a predicted duty cycle module;

means for determining the optimum polarity of the pulse width modulation for a predicted duty cycle based on a pulse width modulation generation algorithm; and

means for determining the optimum type of the pulse width modulation for a predicted duty cycle based on the pulse width modulation generation algorithm.

5. The system according to claim 4, wherein the pulse width modulation generation algorithm is

6. The system according to claim 4, wherein the type of the predicted duty cycle is one of unipolar or bipolar.

7. A computer-readable medium for determining a predictive duty cycle that is able to determine the magnitude and pulse width of an H-bridge pulse width modulation that is used to drive a machine motor, comprising:

means for determining one or more machine parameters;

means for inputting the machine parameters into a predicted duty cycle module; and

means for determining the optimum polarity of the pulse width modulation for a predicted duty cycle based on a pulse width modulation generation algorithm; and

means for determining the optimum type of the pulse width modulation for a predicted duty cycle based on the pulse width modulation generation algorithm.

8. The computer-readable medium according to claim 7, wherein the pulse width modulation generation algorithm is

9. The computer-readable medium according to claim 7, wherein the type of the predicted duty cycle is one of unipolar or bipolar.