INTERFACE CIRCUIT FOR DETECTING FAULT OF RESOLVER AND METHOD THEREOF
First Claim
1. A circuit for detecting a fault in a resolver, the circuit comprising:
- a resolver connected to an intermediate point of a stator coil of a first output terminal for a sine wave signal and an intermediate point of the stator coil of a second output terminal for a cosine wave signal, the resolver outputting the sine and cosine wave signals as a common mode signal; and
a resolver fault detection interface unit configured to adjust a gain and an offset of the sine wave signal and the cosine wave signal in order to adjust the sine wave signal and the cosine wave signal received as the common mode signal at a frequency capable of being applied to an analog/digital terminal of a microcomputer, and to allow high-frequency components of the sine wave signal and the cosine wave signal to pass therethrough.
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Accused Products
Abstract
An interface circuit for detecting a fault in a resolver is provided. More specifically, the interface circuit includes the resolver connected to an intermediate point of a stator coil of a first output terminal for a sine wave signal and an intermediate point of the stator coil of a second output terminal for a cosine wave signal to output the sine and cosine wave signals as a common mode signal. Also includes is resolver fault detection interface unit that adjusts a gain and an offset of the sine wave signal and the cosine wave signal in order to adjust the sine wave signal and the cosine wave signal received as a common mode signal to a frequency that can be suitably applied to an analog/digital terminal of a microcomputer, and to allow high-frequency components of the sine wave signal and the cosine wave signal to pass therethrough.
13 Citations
10 Claims
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1. A circuit for detecting a fault in a resolver, the circuit comprising:
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a resolver connected to an intermediate point of a stator coil of a first output terminal for a sine wave signal and an intermediate point of the stator coil of a second output terminal for a cosine wave signal, the resolver outputting the sine and cosine wave signals as a common mode signal; and a resolver fault detection interface unit configured to adjust a gain and an offset of the sine wave signal and the cosine wave signal in order to adjust the sine wave signal and the cosine wave signal received as the common mode signal at a frequency capable of being applied to an analog/digital terminal of a microcomputer, and to allow high-frequency components of the sine wave signal and the cosine wave signal to pass therethrough. - View Dependent Claims (2, 3)
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4. A method of providing an interface for detecting a fault in a resolver, the method comprising:
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withdrawing, by an interface circuit, a sine signal and a cosine signal as a common mode signal from an output terminal of the resolver that detects a position of a rotor of a motor; adjusting, by the interface circuit, a gain of the sine and cosine signals withdrawn as the common mode signal to be suitably applied to an analog/digital converting terminal of a microcomputer; adjusting, by the interface circuit, an offset of the sine and cosine signals withdrawn as the common mode signal to be suitably applied to the analog/digital converting terminal of a microcomputer; and applying, by the interface circuit, a signal of the sine and cosine signals withdrawn as the common mode signal to the analog/digital converting terminal of a microcomputer. - View Dependent Claims (5)
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6. A circuit for detecting a fault in a resolver in an electric motor of a hybrid or electric vehicle, the circuit comprising:
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a resolver connected to a stator of the motor to detect fault in the motor, the resolver outputting sine and cosine wave signals as a common mode signal; and a resolver fault detection interface unit configured to adjust a gain and an offset of a sine wave signal and a cosine wave signal in order to adjust the sine wave signal and the cosine wave signal received as the common mode signal at a frequency capable of being applied to an analog/digital terminal of a microcomputer, and to allow high-frequency components of the sine wave signal and the cosine wave signal to pass therethrough. - View Dependent Claims (7, 8, 9, 10)
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Specification