SU1432678A1 - Thyratron electric machine - Google Patents

Abstract

The invention relates to electrical machines with contactless switching of the core sections, in particular, valve torque motors and tachogenerators. The aim of the invention is to reduce the fluctuations in the uniformity of rotation of the voltage rotor when operating in a generator mode. Valve el. Maiina contains the main winding, the second, third and fourth sections of which are shifted relative to the first section by 90, 135 and 225 e. hail. It is supposed to perform an inverter control unit with the ability to form opening signals in the rotor angle intervals for the first key element of the inverter 0-135, the second 135-225, the third 180-270, the fourth 270-45, the fifth 180-35, the sixth 315-45 , seventh 0-90, eighth 90-225 el.grad. The first and fifth key elements make up the first branch of the inverter, the second and sixth - the second, TpeTin i and the seventh - the third and fourth and eighth - the fourth branches of the inverter. It is supposed to simultaneously connect a current-conducting element in series with the inter- esTopoM or parallel to the generator load, switched or not switched by the position of the rotor. 2 e.p., f-ly, 2 ill. 1G (L

Description

liu so y

ABOUT)

h

00

 The invention relates to electrical engineering, in particular, to electrical machines with contactless switching of core winding sections, and can be used, for example, as a tachogenerator of follow-up circuits.

The aim of the invention is to reduce voltage ripples when operating in a generator mode.

Oi ... fig. - 1 depicts a valve-electric machine, general view; in fig. 2 - cyclographic signals of the position sensor poTQpa and output signals of the functional converter.

The valve-mounted electrical machine (FIG. I) contains key elements 1-8, for example, transistors forming inverter (rectifier) 9, measles with magnetic core and asymmetrical four-section beam winding, inductor 10, rotor position sensor (DPR) with rotor 11 and stator 12, functional converter (FP) 13. The cell elements may have two-way conductivity, the magnetic conductor may or may not have grooves. Winding - diametral. The beginnings of the sections are designated A, B, C, D. Sections C and D are shifted relative to sections A by 90, 135 and 225 e. hail. At the inductor the angular size of the pole arc is approximately 135 el.grad. On the stator of the DPR there are four sensitive elements symmetrically through 90. On the rotor of the DPR are located the signal elements, the angular size of which is 135 el.grad. The sensing elements of the DPR are connected to the inputs of the FP, which are connected to the control inputs of the key elements 1-8. The first, fourth, fifth and eighth channels of the functional converter 1 are made in the form of logical elements. A repeater, the inputs of which are connected respectively to the first, fourth, third, third and second sensitive elements of the sensor, the second third, sixth and seventh channels of the converter are made in the form of elements BAN, whose direct inputs are connected to the second, third, fourth, and second, respectively, and the inverse inputs, respectively, to the first, fourth, third, and first sensing elements of the sensor.

Between the terminals of the rectifier E and F included load 14. If the resistance

with

0

with resistance equal to

five

The load Z is less than the double resistance of section 2 Z, then it is necessary to insert a current-carrying element with a resistance equal to 2 Zj, -Zj instead of the GE jumper. If the load resistance is greater than 2 Z ,. it is necessary to parallel the load between terminals E and F to turn on the conductor n1 1st element

 ZH 2Ze In all cases, the load impedance of the output voltage between terminals G and E is 2Zg.

The electric valve machine works in the following way.

When the rotor is rotated, the drive motor drives the electromotive force to sections of the core winding with outputs A, B, C, D, and the logical signals hell and a, and hell, FP generate the rectifier control signals b and b ,, .. ,, bg depending on the angle of rotation of the rotor q; (Fig. 2). The rectifier according to the signals of the FP switches the sections of the core winding. As a result, the voltage of one sign and level comes all the time, although four sections of the winding operate simultaneously on the first and fifth intervals, and two winding sections on the remaining intervals (Fig. 2).

Claims (3)

1. A valve-driven electric machine containing a rotor, a stator with a four-section winding of the core, first, second, third and fourth sections of which are connected in a star and connected to the power supply through a bridge inverter, consisting of the first, second, third, and fourth branches formed by the first, fifth, second, and sixth, third, and seventh, fourth, and eighth key elements, whose control circuits are connected to the output of the rotor position sensor via a functional converter, second, third, and fourth sections The coils of the core are shifted relative to the first one by 90, 135 and 225 electr. hail, characterized in that, in order to reduce voltage ripples when operating in the generator mode, the rotor position sensor and the functional converter are configured to form unlocking signals for the first key element in the current of the angular interval is 0-135, the second is 135-225, the third is 180-270, the fourth is 270-45, the other is 180-315, the sixth is 15-45, the seventh is 0-90, the eighth is 90-225 degrees, in the circuit between the load and an inverter is connected to the inverter. 2. A machine in accordance with claim 1, wherein the conductive element is connected in series with the load. 3. Machine pop.1, characterized in that the current jW element is connected in parallel with the load. fie. / but. ABOUT 155 island 90 Q-J) ef 7 h 22J with G / 60 erad  H Y ЗГ5 -.V 27O Is. one L