초록 ▼

The resolver drive circuit on a numerical control system includes a microprocessor system which monitors the phase and amplitude of the sinusoidal wave forms applied to the resolver. Any changes in amplitude or phase shift of the applied wave forms due to such factors as time and temperature are aut

The resolver drive circuit on a numerical control system includes a microprocessor system which monitors the phase and amplitude of the sinusoidal wave forms applied to the resolver. Any changes in amplitude or phase shift of the applied wave forms due to such factors as time and temperature are automatically corrected by the microprocessor system. A highly accurate resolver position feedback system is thus formed with a minimal number of temperature sensitive components and a minimal number of required manual adjustments to analog circuitry.

대표청구항 ▼

A servo drive circuit which employs a resolver-type position feedback transducer, the combination comprising: reference generation means for generating data indicative of the phase of a periodic wave form; first wave form generation means coupled to the reference generation means and operable to gen

A servo drive circuit which employs a resolver-type position feedback transducer, the combination comprising: reference generation means for generating data indicative of the phase of a periodic wave form; first wave form generation means coupled to the reference generation means and operable to generate a first periodic wave form which is applied to the resolver-type position feedback transducer which has a first preselected phase relationship with said generated data; second wave form generation means coupled to the reference generation means and operable to generate a second periodic wave form which is applied to the resolver-type position feedback transducer which has a second preselected phase relationship with said generated data; phase detection means coupled to one of said wave form generation means and being operable to generate data indicative of the phase of said one periodic wave form; phase altering means coupled to one of said wave form generation means for altering the phase of its generated periodic wave form in response to phase correction data; and processor means coupled to said phase detection means to receive its generated data, coupled to said reference generation means to receive its generated data, and coupled to generate phase correction data to said phase altering means, said processor means being operable to periodically measure the phase of one of said periodic wave forms and determine its phase relationship with respect to said reference generation means data, and being operable to generate correction data to said phase altering means for maintaining a preselected phase relationship between said first and second periodic wave forms.