Controlling lead angle using a single motor integrated circuit pin
First Claim
Patent Images
1. A system, comprising:
- an analog-to-digital converter (ADC) configured to;
receive a discrete analog voltage via a single integrated circuit pin to control a lead angle in a motor; and
generate a digital bit value comprising a plurality of digital bits representing said analog voltage, said digital bit value encoding a target intercept indicator value as at least a first of the plurality of digital bits and a target slope indicator value as at least a second of the plurality of digital bits according to the discrete analog voltage; and
control logic, coupled to the ADC, configured to;
identify a target intercept and a target slope for a lead angle curve by decoding the digital bit value to determine the target intercept at least partially according to the first of the plurality of digital bits and determine the target slope at least partially according to the second of the plurality of digital bits, wherein the target intercept indicates a lead angle value at zero motor rotation frequency, and wherein the target slope indicates a rate of change of the lead angle curve corresponding to a change in the motor rotation frequency; and
control the motor based on the lead angle identified using said lead angle curve.
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Abstract
A system, in some embodiments, comprises: an analog-to-digital converter (ADC) configured to receive a discrete analog voltage and to generate a digital bit value representing said analog voltage; control logic, coupled to the ADC, configured to identify a target intercept and a target slope for a lead angle curve based on the digital bit value; and a motor, coupled to the control logic, configured to operate based on a lead angle identified using said lead angle curve, wherein the ADC receives the analog voltage via a single integrated circuit pin.
14 Citations
20 Claims
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1. A system, comprising:
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an analog-to-digital converter (ADC) configured to; receive a discrete analog voltage via a single integrated circuit pin to control a lead angle in a motor; and generate a digital bit value comprising a plurality of digital bits representing said analog voltage, said digital bit value encoding a target intercept indicator value as at least a first of the plurality of digital bits and a target slope indicator value as at least a second of the plurality of digital bits according to the discrete analog voltage; and control logic, coupled to the ADC, configured to; identify a target intercept and a target slope for a lead angle curve by decoding the digital bit value to determine the target intercept at least partially according to the first of the plurality of digital bits and determine the target slope at least partially according to the second of the plurality of digital bits, wherein the target intercept indicates a lead angle value at zero motor rotation frequency, and wherein the target slope indicates a rate of change of the lead angle curve corresponding to a change in the motor rotation frequency; and control the motor based on the lead angle identified using said lead angle curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method, comprising:
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receiving a discrete analog voltage on a single integrated circuit input pin of an analog-to-digital converter (ADC), said discrete analog voltage being operable to control a lead angle in a motor; determining a target intercept and a target slope of a lead angle curve based on said discrete analog voltage by; generating a digital bit value comprising a plurality of digital bits representing said analog voltage, said digital bit value encoding a target intercept indicator value as at least a first of the plurality of digital bits and a target slope indicator value as at least a second of the plurality of digital bits according to the discrete analog voltage; and identifying a target intercept and a target slope for a lead angle curve by decoding the digital bit value to determine the target intercept at least partially according to the first of the plurality of digital bits and determine the target slope at least partially according to the second of the plurality of digital bits, wherein the target intercept indicates a lead angle value at zero motor rotation frequency, and wherein the target slope indicates a rate of change of the lead angle curve corresponding to a change in the motor rotation frequency; and operating a motor using said lead angle curve. - View Dependent Claims (17, 18, 19, 20)
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Specification