RESOLVER DEVICE | RESOLVERVORRICHTUNG | DISPOSITIF DE RÉSOLVEUR
|Erfinder:||Nakazato, Kenichi (0)|
c/o Japan Aviation Electronics Industry Limited; 21-2, Dogenzaka 1-chome; Shibuya-ku, Tokyo 150-0043, JP
Abstract / Hauptanspruch
|An n-th-harmonic error estimation unit that estimates the error component of an n-th harmonic included in a resolver angle θ and a subtraction unit that subtracts an n-th-harmonic estimated angle error from θ to output the corrected angle θ' are included. The n-th-harmonic error estimation unit includes a first integrator that integrates an angular velocity obtained from the angle calculation unit to calculate an actual angle; a first subtractor that subtracts the actual angle from θ to calculate a resolver angle error; an n-th-harmonic error phase detection unit that obtains a phase difference u such that an integral, for a 1/n period of an electrical angle, of a detected output obtained by synchronously detecting the resolver angle error by using a rectangular wave obtained by comparison from a COS wave expressed as cos(nθ + u) becomes zero, and to generate and output a SIN wave expressed as sin(nθ + u) from the obtained u; a comparator that does comparison with the SIN wave; a second subtractor that subtracts the actual angle from θ' to calculate a corrected angle error; a synchronous detector that synchronously detects the corrected angle error by using a rectangular wave output from the comparator; a second integrator that integrates a detected output of the synchronous detector for a 1/n period of the electrical angle; an amplitude setter that sets an error amplitude from an integral of the second integrator; and a multiplier that generates the n-th-harmonic estimated angle error by multiplying the SIN wave by the error amplitude. A large storage area becomes unnecessary, and an angle error can be corrected.|
Kommentare zu diesem Patent schicken Sie bitte an .