SU991571A1 - Synchronized thyratron electric motor - Google Patents

Description

The invention relates to electrical engineering and, in particular, to synchronized valve motors. S

A synchronized motor with frequency-phase speed control is known, in which, along with the engine, there is a frequency sensor, a frequency multiplier of rotation., TO an inverter for regulating the motor voltage and a frequency-phase controller that compares the driving signal from an external or internal the clock generator and the signal from the frequency sensor in frequency and phase and controls the inverter. This ensures synchronism between the frequency of the synchrochetor and the rotation of the engine. In a more general case of using a valve electric motor 20, the inverter is made with a t-phased ull. This device has two drawbacks, one of which is the need to provide an additional position sensor on its shaft to control the t-phase inverter. This complicates the drive design. The second voltage is in a relatively small range of regulated JQ speeds in a synchronous mode.

since the decrease in rotational frequencies and, consequently, the frequencies of the sensor signal, increases and the control delay unacceptably increases, but with an increase in the rotational frequency, there are difficulties of a different kind caused by limitations in the possibility of high-speed processing of information from the synchro-generator and sensor.

The closest to the technical essence of the invention is a synchronized valve electric motor containing a synchronous machine. A t-phase root winding is connected to the t-phase output of an inverter having (ri-phase input and a voltage control input) rotor position sensor. contactless-selsyn, the T-phase input of which is connected to the T-phase output of the reference frequency generator, m decoders, each of which is connected to the corresponding phase output of the generator by a single input h the other, with the output of the rotor position sensor, and the output with the corresponding phase inputs of the inverter, logic gate AND It is connected by a first input to the output of the rotor position sensor and a synchronous generator Zj. therefore, in low energy indices of a valve electric motor. The aim of the invention is to increase the energy indices: In transient modes by reducing time and controlling transition at Synchronization valve motor. The goal is achieved by the fact that in a synchronized valve motor containing a synchronous machine, the T-phase root winding of which is connected to the T-phase output of the inverter, having a T-phase input and a voltage regulating input, is a rotor position sensor, A contactless selsyn, the T-phase input to which is connected to the y1-phase output of the reference frequency generator wi deshitory, each of which is connected to the corresponding phase output of the reference frequency generator by the first input and the other to the output of the sensors to the position of the rotor, and the output with the corresponding phase input inverter logic element I, connected by the first input to the output of the rotor field sensor, and the synchronous generator, the first input of which is connected to the auxiliary output of the frequency generator, and the second input to the frequency signal demand controller rotation speed of the electric motor is additionally introduced a common decoder, the first and second reset nodes filter, comparator, sawtooth generator and a counter, which is connected to the output of the synchronous generator by a counting input , the bit outputs — with the corresponding bit inputs of the common decoder, and the load and set O inputs, respectively, with the outputs of the first and second reset nodes, each of which has a Reset input connected to the output of the rotor position sensor, and the second and third groups of the bit outputs of the common decoder, the first group of bit outputs of which is connected to the second input of the logic element I, the output of which is connected to the input of the regulator of the voltage generator through a filter torus, whose input is connected to the output of the ramp signal generator coupled input to an output of the rotor position sensor. The drawing shows a diagram of a synchronized valve motor. The circuit contains a synchronous machine 1, whose T-phase root winding is connected to the T-phase output of the inverter 2, which has a T-phase input and a voltage control input, a rotor position sensor 3, made in the form of a contactless selsyn, whose T-phase input connected to the t-phase output of the reference frequency generator 4, m decoders 5, each of which is connected to the corresponding phase output of the reference frequency generator 4 by the first input, the other to the output of the rotor position sensor 3, and the output to the corresponding inverter phase input, logical element .6 And connected by the first input to the output of the rotor position sensor, synchronizer 7, the first input of which is connected to the additional output of the reference frequency generator 4, and the second input to the frequency signal setpoint of the required motor rotation speed, counter 8 ,. connected at the counting input with the output of the synchronizer 7, for the bit outputs - with the corresponding inputs of the common decoder 9, and the inputs Loading and Installation O, respectively, with the outputs of the first and second reset nodes 10 and 11, each of which by the input Reset is connected with. the output of the rotor position sensor 3, and the bit inputs, respectively, with the second and third group of bit outputs of the common decoder 9, the first group of bit outputs of which are connected to the second input of the logic element 6, the output of which is connected to the inverter control input by voltage the filter 12 and the comparator 13, the input of which is connected to the output of the generator 14 of the saw-tooth signal connected to the output of the sensor 3 of the rotor position. The reference frequency generator 4 in turn consists of a crystal oscillator 15, a phase splitter 16 and a power amplifier 17. Synchronized valve motor works as follows. The phase of the sensor 3 signal is identically equal to the angular position of the rotor of the engine 1. Phase decoders 5, the inputs of which combine the signal from the sensor and the corresponding phase signals of the reference frequency generator 4, produce phase signals varying identically to the angular position of the rotor of the engine 1, as a result of which engine 1 receives MONOTON electromagnetic

torque and accelerate to a given speed.

The frequency of the signal of the synchronizing generator 7 is set before the start-up n-fold the sum of the reference and reference rotational frequencies and is reduced by the counter 8 by n times. At the same time, at the outputs of the decoder 9, pulses are generated with a duration of 1 / n and with a frequency with which the signal of the sensor 3 must be synchronized to achieve a given rotational frequency.

Packs of pulses received at the first group of bit 1 ... p of the outputs of the decoder 9 arrive at the element 6, in which they are combined into the resulting reference signal which is compared in phase with the signal of the sensor 3, as a result of the output of the element 6 impulses are formed, the duration of which, depending on the phase matching of the edges of the compared signals, can vary from | to 0. This signal is converted into a level by means of the filter 12, and using the comparator 13 and the generator 14 of the saw voltage again It is shaped into a pulse signal, changing its duration in the full range, i.e. from Logic 1 to Logic O. This signal is fed to the input of the inverter voltage control 2.

Thus, the combination of the counter, the decoder 9 and the element And b, as well as the filter 12 and the comparator 13 performs the function of phase control of the speed of the electric motor.

The area of the linear characteristic of the phase control is determined by the width y / I. reference total - impulse and synchro generator 7, within which the front of the rotor position sensor 3 signal can be oriented, and the iris of this zone can be set optimal in terms of static fineness and attenuation of the transient process according to the drive parameters by selecting the ratio between the numbers and f.

In addition, the distinctive features of the valve motor due to the action of nodes 10 and 11 of the reset. The reset node 10 is triggered when the front of the signal from the rotor position sensor 3 is within the action limits (i4 +1). . .yi pulses at the outputs of the third group of the bit outputs of the common decoder 9, which corresponds to a negative phase matching of the signals with the output of the rotor position sensor 3 and the synchronizer 7. At the same time, the resetting unit 10 resets the counter 8 to polo. O at the time immediately preceding the action

the reference signal from the clock generator 7. Due to this, the size of the control zone with Logic 1 is limited to 1 / and. The reset unit 11 is triggered when the front of the signal of the rotor position 3 coincides with the pulses from (S +2) to K at the outputs of the second group of the bit outputs of the common decoder 9 and reset the counter 8 to the position (+ 1)

O directly follows in time the reference signal of the synchronizing generator 7. Due to this, the size of the control zone with Logic O is also limited to 1 / Vi.

5 These zones of restriction are 5 times smaller than the linear zone of regulation and the choice of coefficient and can be reduced to arbitrarily small.

Thus, -.-When changing the sign. misalignment of frequencies, for example at start-up, the drive almost instantly, without overshoot, is in the zone of linear regulation, thereby ensuring

5 is the most favorable course of the synchronization process, and thereby higher energy energies are achieved. indicators of the synchronized valve motor.

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Claims (2)

1.Trantenberg P.M. Astatic discrete systems of electric, direct current drive. - Electricity, 1972, № 4. 2. Authors certificate of the USSR 327552, cl. H 02 K 29/02, 1970.