Electromagnetic sensor direct communication algorithm to a digital microprocessor
First Claim
1. A method of interfacing an electromagnetic sensor with a controller in a control system comprising:
- applying an excitation signal to the electromagnetic sensor;
receiving a first electromagnetic sensor output signal based on said excitation signal, said first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor;
receiving a second electromagnetic sensor output signal based on said excitation signal, said second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to said position of said rotor of the electromagnetic sensor;
sampling said first electromagnetic sensor signal and said second electromagnetic sensor signal at about an instance synchronous with said excitation signal to demodulate said first electromagnetic sensor signal and said second electromagnetic sensor signal; and
decoding a resultant of said sampling to identify said position of a rotor of the electromagnetic sensor.
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Abstract
A method of interfacing an electromagnetic sensor with a controller in a motor control system, the method including: applying an excitation signal to the electromagnetic sensor; receiving a first electromagnetic sensor output signal based on the excitation signal, the first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor; and receiving a second electromagnetic sensor output signal based on the excitation signal, the second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to the position of the rotor of the electromagnetic sensor. The method also includes sampling the first electromagnetic sensor signal and the second electromagnetic sensor signal at about an instance synchronous with the excitation signal to demodulate the first electromagnetic sensor signal and the second electromagnetic sensor signal and decoding a resultant of the sampling to identify the position of a rotor of the electromagnetic sensor.
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Citations
31 Claims
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1. A method of interfacing an electromagnetic sensor with a controller in a control system comprising:
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applying an excitation signal to the electromagnetic sensor;
receiving a first electromagnetic sensor output signal based on said excitation signal, said first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor;
receiving a second electromagnetic sensor output signal based on said excitation signal, said second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to said position of said rotor of the electromagnetic sensor;
sampling said first electromagnetic sensor signal and said second electromagnetic sensor signal at about an instance synchronous with said excitation signal to demodulate said first electromagnetic sensor signal and said second electromagnetic sensor signal; and
decoding a resultant of said sampling to identify said position of a rotor of the electromagnetic sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 26, 27)
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15. A system for interfacing an electromagnetic sensor with a controller in comprising:
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a electromagnetic sensor, said electromagnetic sensor receptive to an excitation signal and transmitting a first electromagnetic sensor output signal based on said excitation signal and a second electromagnetic sensor output signal based on said excitation signal, said first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor, said second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to said position of said rotor of the electromagnetic sensor;
a controller receptive to said first electromagnetic sensor output signal and said second electromagnetic sensor signal;
said controller sampling said first electromagnetic sensor signal and said second electromagnetic sensor signal at about an instance synchronous with said excitation signal to demodulate said first electromagnetic sensor signal and said second electromagnetic sensor signal;
said controller further decoding a resultant of said sampling to identify said position of a rotor of the electromagnetic sensor. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 28)
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29. A system for interfacing a electromagnetic sensor with a controller comprising:
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means for applying an excitation signal to the electromagnetic sensor;
means for receiving a first electromagnetic sensor output signal based on said excitation signal, said first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor;
means for receiving a second electromagnetic sensor output signal based on said excitation signal, said second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to said position of said rotor of the electromagnetic sensor;
means for sampling said first electromagnetic sensor signal and said second electromagnetic sensor signal at about an instance synchronous with said excitation signal to demodulate said first electromagnetic sensor signal and said second electromagnetic sensor signal; and
means for decoding a resultant of said sampling to identify said position of a rotor of the electromagnetic sensor.
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30. A storage medium encoded with machine-readable computer program code for of interfacing a electromagnetic sensor with a controller, said storage medium including instructions for causing a computer to implement a method comprising:
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applying an excitation signal to the electromagnetic sensor;
receiving a first electromagnetic sensor output signal based on said excitation signal, said first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor;
receiving a second electromagnetic sensor output signal based on said excitation signal, said second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to said position of said rotor of the electromagnetic sensor;
sampling said first electromagnetic sensor signal and said second electromagnetic sensor signal at about an instance synchronous with said excitation signal to demodulate said first electromagnetic sensor signal and said second electromagnetic sensor signal; and
decoding a resultant of said sampling to identify said position of a rotor of the electromagnetic sensor.
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31. A computer data signal, said computer data signal embodied in a computer readable medium comprising code configured to cause a computer to implement a method for of interfacing a electromagnetic sensor with a controller comprising:
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applying an excitation signal to the electromagnetic sensor;
receiving a first electromagnetic sensor output signal based on said excitation signal, said first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor;
receiving a second electromagnetic sensor output signal based on said excitation signal, said second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to said position of said rotor of the electromagnetic sensor;
sampling said first electromagnetic sensor signal and said second electromagnetic sensor signal at about an instance synchronous with said excitation signal to demodulate said first electromagnetic sensor signal and said second electromagnetic sensor signal; and
decoding a resultant of said sampling to identify said position of a rotor of the electromagnetic sensor.
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Specification