SU1434528A1 - Device for controlling multiple-pole rotary transformers - Google Patents

Abstract

The invention relates to automation, namely to devices for controlling electric machines such as multi-pole rotary transformers (BT). The purpose of the invention is to improve the accuracy of control of the BT and simplify the device. For this purpose, in this device, the sine and cosine windings of the tested BT 2 are connected to the input windings of the BT 3 introduced into the device so that the voltage from the output winding of BT 3 is proportional to. The sum of the squares of the voltage of the sinus and cosine windings of the tested VT 2. The shaft of the BT 3 is connected to the shaft of the checked BT 2 and the executive motor 5 through a gearbox 4 having a gear ratio equal to the ratio of the coefficients of electrical reduction of both BT. 1 il. F

Description

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| C

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d

The invention relates to automotive, and specifically to devices for controlling electric machines such as multi-pole rotary transformers (BT).

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

i The drawing shows a block diagram of the proposed device, I The device contains a source of 1 pi 4ani, a verifiable rotating transformer (transformer (BT) 2, a rotating transformer (BT) 3, a gearbox 4, an executive motor 5 and a measuring unit 6.

The device works as follows.

Rotating transformers are set to zero. | U: power supplied to the excitation winding of the insulated VT 2. When the rotor of the inspected VT 2 is turned by the executive motor, the voltages from the sinus (U) and ko ™ (curvature (and) windings) vary according to $ , I, Uc K Ugsin PI o (i.

 U K, UgCOS P, 0 (,

where K is the transformation ratio

checked BT; P is the electrical factor

reductions, d is the angle of rotation.

I Voltages U and U are applied to the input windings BT 3. The voltage on the output winding BT 3 is equal to I Ugbix K jKjUglJsinPi о (l -cosP,) i; RL coefficient of electrical

reductions;

n - -the gear ratio.

P If n -, and checked BT 2

r not 1p "has errors, then

and

VGH

 K, (sin P oC + cos)

 K.

In this case, the output voltage BT 3 does not depend on the angle of rotation.

In the presence of an error & tested W 3, the output voltage W 3 fluctuates from the angle of rotation;

Ugfcix K, K, U0 + li (with (0),

By measuring the output voltage fluctuations, it is possible to determine the error of the tested BT 2 by the formula

15

j.

 UMCIUC + U HH

(happy) g

where and are the largest and smallest output voltage BT 3, respectively.

. Thus, the proposed device significantly improves the accuracy of control. In addition to the proposed device, the electronic components are replaced by simpler electromechanical ones.

Claims (1)

Invention Formula A device for controlling multi-pole rotating transformers containing a power source, an executive: motor and measuring unit, characterized in that, in order to increase the accuracy of control and simplification of the device, a rotating transformer and a gearbox, the beginnings and ends of the sinus and cosine windings are introduced into it rotary transformer are designed to be connected with the beginnings and ends of like windings of the tested rotary transformer, the excitation winding of the rotary transformer is connected to the measuring The power unit ja and its shaft are designed to be connected through a gearbox to the shafts of a tested rotating transformer and an executive motor, the gearbox being chosen with a gear ratio equal to the ratio of the electrical reduction coefficients of said rotating transformers.