SU1251330A1 - Shaft turn angle-to-digital converter - Google Patents

Abstract

The invention is used to convert the movement of a shaft of sinus-cosine rotary transformers and the movement of linear transformers into a digital code. The aim of the invention is to simplify the converter and increase its accuracy. In the converter containing a selective amplifier, a phase-code converter, a differential frequency selection unit, four voltage-current converters are introduced that supply the transformer stator windings with currents of the same frequency and the rotor windings of the transformer with currents of a different frequency. The phase difference of the voltage difference across the compensation winding of the transformer and the reference voltage is converted into a code. 1 silt "(L | S el 00 00 o

Description

The invention relates to electromechanics and automation, can be applied in devices for converting the movement of sine-cosine: rotary and linear transformers, inductosynes, etc. into the output voltage duration or a numerical code.

The purpose of the invention is to simplify and improve the accuracy of the converter.

The drawing shows the functional diagram of the Converter.

The converter contains voltage-to-current converters 1-4, a differential-frequency allocation unit 5, a selective amplifier 6, a phase-code converter 7, a sine-cosine rotating transformer (SCWT) 8 containing stator windings 9 and 10, rotary windings - kn P, I2 and compensation winding 13, power supply 14–17.

The converter works as follows.

Voltage with gunn 14-15 meals,

converted to a system of quadrature currents, the outputs of the converters 1 and 2 create a magnetic flux of the stator SCRT 8, rotating at a frequency of 1x, and the system of quadrature currents at the outputs of the converters 3 and 4, obtained from the power supply voltage from 16 to 17, - the magnetic flux of the rotor SQT 8, rotating with the frequency a) ,, the spatial position of which is determined by the position of the rotor SQT 8 and direction; rotation of the magnetic flux of the stator and the rotor of the SSCR 8 is chosen the same. Then, depending on its spatial position, the sum of the cosine-shaped or sinusoidal EMF components is induced on the compensation winding 13 of SCFT.

I

t, Ecos

x) -uJJt

.l

(oJ,

where o (e

rotation angle of the rotor; voltage amplitude on stationary and rotor windings CKRT 8. Vudeliv using selective

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amplifier 6 component

five

0

five

0

five

40

45

50

55

„„ G (C, - 7-It, / t I

2i .cos (- 2 -

and with the help of block 5 of the difference frequency allocation, the reference voltages

V vcos b-L: -i) t,

determine the phase - / 2, submitting the resulting. voltages on the inputs of the converter 7 phase-code.

When the temperature changes, the parameters of the stator windings 10 and rotor windings II and 12 change in the same direction, therefore the phase errors are introduced into the position of the flow vectors of the stator and the rotor of the SCRT 8 with the same sign and, when the difference signal is extracted, the errors compensate

Formula shade shadow

Shaft rotation angle converter into a code containing a sine-cosine rotary transformer with two stator and two rotor windings, a differential allocation unit, frequency, the output of which is connected to the first input of the phase – code converter, a selective amplifier whose output is connected to the second input of the converter the phase code, the first and second power buses, connected respectively to the first and second inputs of the differential frequency allocation unit; the third and fourth power buses, characterized in that, in order to simplify and The first, second, third, and fourth voltage transformers are injected into current, and a sine-cosine rotating transformer is equipped with a compensation winding, the first power supply bus is connected to the input of the first voltage transformer to current, the output of which is connected to the input the first stator winding of the sine-cosine rotary transformer, the second power bus is connected to the input of the second voltage / current converter, the output of which is. connected to the first rotor winding of a sine-cosine rotating transformer, a third power bus connected to the input of the third voltage-current converter, the output of the co-.

the second is connected to the second rotor winding of a sine-cosine rotating transformer, the fourth power pin is connected to the input of the fourth voltage-current converter, the output of which is connected

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with the second stator winding of the sine-cosine rotating transformer, the compensation winding of the sine-cosine rotating transformer is connected to the input of the selective amplifier.

i / sLrtex r t

i / cose f t IB

i & inff zt 16

and cos t

77

Compiled-A. Sidorenko Editor N Slobod nickname Tehred L. Serdyukova Corrector A. Obruchar

Order 4426/58 Circulation 816 Subscription

VNIIGI USSR State Committee on Inventions and Discoveries 4/5, Raushsk nab., Moscow, 113035

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

Claim A converter of the angle of rotation of the shaft into a code containing a sine-cosine rotating transformer with two stator and two rotor windings, a differential frequency extraction unit, the output of which is connected to the first input of the phase-code converter, a selective amplifier, the output of which is connected to the second input of the phase-code converter, the first and the second power bus connected respectively to the first and second inputs of the differential frequency allocation unit, the third and fourth power bus, characterized in that, in order to simplify and increase accuracy of the converter, the first, second, third and fourth voltage-to-current converters are introduced into it, and a compensation winding is inserted into the sine-cosine rotating transformer, the first power bus is connected to the input of the first voltage-to-current converter, the output of which is connected to the input of the first stator sinus-sine winding rotating transformer, the second power rail is connected to the input of the second voltage to current Converter, the output of which. connected to the first rotor winding of the sine-cosine rotating transformer, the third power bus is connected to the input of the third voltage to current converter, output co-. with a second stator winding of the sine-cosine rotary transformer · transformer, the compensation winding of the sine-cosine rotary transformer 5 is connected to the input of the selective amplifier. connected to the second rotor winding of the sine-cosine rotating transformer, the fourth power pin is connected to the input of the Fourth voltage to current converter, the output of which is connected