A Resolver Angle Estimator Based on Its Excitation Signal

A Novel Linearization Method of Sin/Cos Sensor Signals Used for Angular Position Determination

“…There are linear position sensors based on Hall effect that, in a pair, generate sin/cos signals [1]. In comparison to resolvers, which require an excitation signal of an order of a couple of kHz [2][3][4][5][6], the rotary encoders and the sensors based on Hall effect do not need this signal to work properly. In this paper, a special attention will be devoted to processing of the sin/cos signals generated by the sensors with no excitation signal.…”

“…By modifying and combining the sin/cos signals, a pseudo-linear signal can be obtained and further processed towards determination of the angular position [2,[4][5][6]. As it was done in [4,5], the pseudo-linear signal is obtained by combining those segments of the sin/cos signals that are characterized by a satisfying linearity.…”

“…As it was done in [4,5], the pseudo-linear signal is obtained by combining those segments of the sin/cos signals that are characterized by a satisfying linearity. For the proper functioning of this method, the information about the quadrant position (π/2 [rad] in width) of the measured angle has to be provided.…”

“…For the proper functioning of this method, the information about the quadrant position (π/2 [rad] in width) of the measured angle has to be provided. In this paper we use the same method for obtaining the pseudo-linear signal as in [4,5], except that instead of the current quadrant position of the input angle the half of the quadrant is determined. Since the sine and cosine signals are mutually phase shifted by π/2 we can determine the rotation direction of the rotating object [1].…”

“…The method we propose in this paper can be used, without any modifications, for processing of the resolver output signals after they are demodulated. In papers [2,[4][5][6] a several angular position determination methods, based on the resolver application, are proposed. These methods do not include A/D conversion, i.e.…”