SU1742951A1 - Method of tuning of thyratron motor - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to improve the tuning accuracy. The valve motor is made on the basis of a two-phase synchronous motor with a rotor position sensor, equipped with an excitation winding and a sine and cosine windings associated with the phases of the core winding of a synchronous motor. A valve motor with a control object is installed in the stand, a control voltage is applied to the field winding of the rotor position sensor, a voltage is determined that characterizes the phase shift of the voltage in the sinus winding of the synchronous motor, and the rotational EMF induced in the cosine winding of the synchronous motor fixing the angular position of the stator of the rotor position sensor corresponding to the maximum torque is carried out at a zero value of the measured voltage, times orachivayut stator rotor position sensor relative to the motor stator and CONST angular position sensor stator, corresponding to the maximum torque with SP 3 yl

Description

The invention relates to electrical engineering, in particular, to electric motors of direct current with contactless switching performed by means of semiconductor devices, i.e., to valve motors.

The purpose of the invention is to increase the accuracy of settings.

FIG. 1 shows an example of a functional diagram of a valve motor and a stand implementing the proposed method; in fig. 2 - electrical schematic diagram of a phase-sensitive rectifier; in fig. 2 - signal plots explaining the proposed setting method

The valve motor 1 contains a two-phase synchronous machine 2 with permanent magnets on the rotor 3 and the crust winding and a sine-cosine rotor position sensor 4 (DPR). The anchor winding of the synchronous machine is made of two sinus half windings 5 and 6 and two cosine half windings 7 and 8 and connected through amplifiers 9 and 10, respectively, to the sine and cosine windings 11 and 12 of the DPR with excitation winding 13 Control object 15 is connected to the synchronous machine shaft. Bench 16 contains a measuring device 17. Comparator 21, phase-sensitive rectifier Mitel (FW) 22 and the source control Nj

4 GO

about

(L

voltage, which is connected to the excitation winding 13.

The phase-sensitive rectifier 22 comprises an operational amplifier 23, resistors 24-28, a transistor 29 and a capacitor 30.

The setting method is as follows.

The adjustable valve motor 1 with the control object 15 is mounted on stand 16. The motor is supplied with voltage by connecting the supply voltage to the amplifiers 9 and 10 and the control voltage to the excitation winding 13 of the DPR 4. The stator of the DPR is deployed relative to the stator of the synchronous motor 2 and fixed maximum torque Mw according to zero reading voltage meter 17.

The torque of the valve motor 1 is determined by the expression

Mvmaks Sin's tv,

0)

where is that;

1 max - the maximum value of the moment 9 - the angle between the stator current and the magnetic flux of the rotor 3.

When applied to the DPR excitation winding 13 and the control voltage Uy, voltages arise at the outputs of the sinus 11 and cosine 12 windings of the DPR 4

Ui killysin ((o + v), U2 kiUycos ((O + v),

where ki - transfer coefficient DPR 4;

W-synchronous rotation frequency.

These voltages are amplified and converted into amplifiers 9 and 10 and fed to the sinus 5 and the cosine 7 half windings of the cores of the synchronous machine 2. The rotating magnetic field formed in the stator bore causes the rotor 3 to rotate. In this case, the magnetic flux of the rotor 3 induces in the sinus 5 and cosine 7 windings of the phases of the synchronous machine core 2 EMF, which are equal to

61 Kdv W COS O) t, 62 Kdv (O Sin (U t,

where kg & is the design factor of a synchronous machine 2.

To determine the phase shift of the voltage in the sine winding 5 of the synchronous machine 2 relative to the emf of rotation induced in the cosine winding 7 of the synchronous machine 2, a circuit assembled at the comparator 21 and FWC 22 is used.

The comparator 21 converts the harmonic signal 62 into a square voltage Do used as a reference for the AFF 22 (FIG. 3).

Do Um singsin ft; t

AND)

where Um is the maximum voltage at the output of the comparator 21,

The voltage 11c, which is fed to the sinus winding 5 of the synchronous machine 2, is also fed to the input of the AFC 22 (Fig. 2 and 3).

At the output of the AFF 22, a voltage U22 is formed, the first harmonic of which is equal to

20

U221 & t U3Cos (f i.

(five)

where KF is the transmission coefficient of the AFF 22, p is the angle between the phases of the input and reference signals.

The filter, formed by resistor 28 and 25 by capacitor 30, filters the high-frequency components of the output signal.

If (p 90 °, then, according to expression (5), U22 0. The essence of the method for setting the valve electric motor 1 is to turn the stator of the DPR 4 to ensure zero voltage at the output of the low-frequency drive 22, which is measured by the measuring device 17. At the same time, the angle between the voltage on the sine winding 5 of the synchronous machine 2 and the emf on the cosine winding 7 of the synchronous machine 2 is 90 °, which ensures the maximum torque of the valve motor 40 body 1.

An increase in the tuning accuracy is achieved by simplifying the measurement of the phase shift between the voltages on the windings of the synchronous machine 2 and the EMF induced in the core winding.

The setting error is determined by

only the work of FWH 22. When building

FV on an operational amplifier type 23

140 UD6A error of work of FWB 22 not

50 exceeds 2%.

Claims (1)

The method can be used in the process of manufacturing and operating electric machines operating as executive valve engines 55 drives of follower systems and stabilization systems for various purposes. A formula of the invention and a method for setting a valve electric motor made on the basis of a two-phase synchronous machine with a rotor position sensor equipped with an excitation winding and a sine and cosine windings connected with the main winding phases of a synchronous machine, which means that the adjustable motor with the control object is installed in the stand , a control voltage is applied to the excitation winding of the rotor position sensor, the stator of the said sensor is deployed relative to the stator of the synchronous machine, sirut the angular position of the sensor stator, respectively 0 The maximum torque, characterized in that, in order to improve the tuning accuracy, after applying a control voltage to the excitation winding of the rotor position sensor, determine the voltage characterizing the shift between the phases of the voltage of the sinus winding of the synchronous machine and the EMF of the cosine winding of the synchronous machines, and fixing the angular position of the stator of the rotor position sensor is performed at a zero value of the specified voltage. A / g / To fa. 9 : K6jr.il and, V, / FIG. 2 u: L / u. h X U yy