Methods and systems for controlling an electronically commutated motor
First Claim
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1. A method for controlling operation of an electronically commutated motor (ECM), said method comprising:
- providing a pulse width modulated signal to an ECM controller; and
adjusting a duty cycle of the pulse width modulated signal to cause the ECM controller to regulate a maximum current drawn by the ECM and an average voltage applied to the ECM, switching between the regulation of the maximum current and the regulation of the average voltage by selecting a first duty cycle to cause the ECM controller to regulate the maximum current drawn by the ECM and a second duty cycle to cause the ECM controller to regulate the average voltage applied to the ECM.
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Abstract
A method for controlling the operation of an electronically commutated motor (ECM) is described. The method includes providing a pulse width modulated signal to an ECM controller and adjusting a duty cycle of the pulse width modulated signal to cause the ECM controller to regulate at least one of a maximum current drawn by the ECM and an average voltage applied to the ECM.
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Citations
20 Claims
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1. A method for controlling operation of an electronically commutated motor (ECM), said method comprising:
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providing a pulse width modulated signal to an ECM controller; and adjusting a duty cycle of the pulse width modulated signal to cause the ECM controller to regulate a maximum current drawn by the ECM and an average voltage applied to the ECM, switching between the regulation of the maximum current and the regulation of the average voltage by selecting a first duty cycle to cause the ECM controller to regulate the maximum current drawn by the ECM and a second duty cycle to cause the ECM controller to regulate the average voltage applied to the ECM. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A unit for controlling the operation of an electronically commutated motor (ECM), said unit comprising:
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a driver circuit for applying signals to windings of the ECM, said driver circuit coupled to a plurality of gate drivers; a processing device comprising at least one pulse width modulated (PWM) output, a reference signal output, and a plurality of digital outputs; and a network coupling said processing device to said gate drivers, said network configured to regulate a maximum current drawn by said ECM and an average voltage applied to said ECM, switching between the regulation of maximum current and the regulation of average voltage based on a duty cycle of the at least one PWM output. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An electronically commutated motor (ECM) assembly comprising:
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the ECM; and an ECM controller configured to control operation of said ECM, said ECM controller configured to regulate a maximum current drawn by said ECM and an average voltage applied to said ECM, switching between the regulation of maximum current and the regulation of average voltage based on a duty cycle of a signal generated by said ECM controller. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification