SU1522353A1 - Thyratron motor - Google Patents

Abstract

The invention relates to electrical engineering and can be used in recording equipment to maintain a uniform rotation frequency. The aim of the invention is to reduce torque ripple and acoustic noise. To achieve this goal, the valve motor contains a synchronous machine 1. The output of sensor 4 is connected via shaper 6 of a rectangular signal to the combined first inputs of logical elements NEVER, the generator 5 is equipped with additional outputs connected to the second inputs of the corresponding logical elements UNEMINARY. The signals of generator 5 at the main and additional outputs are synchronized, and the duration of the pulses at the additional outputs of the generator is 5/12 of the pulse following period. At the outputs of block 3, modulated signals are formed which are close to the trapezoidal shape. Due to this, the current in the windings of a synchronous machine is close to a sinusoidal form, which ensures the achievement of this goal. 2 Il.

Description

shaft rotational speed and having a close-to-ZO. VALUE. distinguishing

to a sinusoidal form, which is ensured by the choice of a pulse duration equal to 5/12 of their repetition period. Combined with the sinusoidal form of the emf of rotation, these voltages provide for the creation of sinusoidal currents in the synchronous machine 1.

 Thus, due to the formation of an asymmetrical pulse sequence with a given duration at the outputs of the generator, the voltages close to sinusoidal voltage are developed at the switch outputs. This leads to fore5

0

By the fact that, in order to increase the uniformity of rotation by reducing the ripple torque, the generator is equipped with additional outputs and is capable of generating pulses at the same main and additional outputs that are rigidly connected in phase and with the duration of pulses at the additional outputs,

equal to Guo T, with each additional output of the generator connected to the second input of the same logical element NEVER, where T is the period of the generator pulses.

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Claims (2)

The claims of the voltage drop on the power switches of the switch 2, the smooth components of the voltages U _a , U ₈ , U _c , measured at 15 terminals A, B, C relative to the negative power bus power keys, repeat the law of modulation of the sequences Q ₄ , Q ₅ , Q _{ . Smooth component of linear stresses. ϋ _βΒ , 20 U _w , supplied to the winding sections of the machine 1, has a shape similar to the shape of the linear voltage U vs = U ₈ - U _c . In this case, to the terminals A, B, C of the windings of the machine 1, linear (along the smooth component) voltages U _{flC are applied} , and _{cu |} , υ _σ6 , mutually shifted in phase by 120 **, formed as a function of the angular position of the rotor, having a shaft rotation frequency and having a close to sinusoidal shape, which is ensured by the choice of the pulse duration equal to 5/12 of their repetition period. Together with the sinusoidal shape of the emf of rotation, these voltages provide the creation of si-. nusoidal currents in a synchronous machine 1. '' Thus, due to the formation of an asymmetric sequence of pulses at additional outputs of the generator with a given length, a fan motor containing an m-phase synchronous machine, sections of the armature winding of which are connected to the output of the τη-phase bridge switch, the control inputs of which are connected to the outputs of the tn-channel control unit, each channel of which consists of a logic element DIFFERENCE, position sensor of the rotor of the phase-rotational type with tn-phase primary winding connected to the main To the generator m-outputs, 25 the output of the rotor position sensor is connected to the 'input of the square-wave pulse generator, the output of which is connected to the combined first ones', inputs of logic elements UNEQUAL 30 VALUE ^ characterized in that, in order to increase the uniformity of rotation by reducing torque ripples, the generator is equipped with additional outputs and is configured to generate pulses at the same main and additional outputs, rigidly connected in phase and with the duration of the pulses per additional GOVERNMENTAL outputs equal ~ ^ 2 ~ T, with each additional output of the generator connected by a body at the outputs of the switch, voltages close to sinusoidal are generated. This leads to the form of the second input of the logical element of the same name DISABILITY, where T is the period of the generator pulses.