scholarly journals Problems of diagnostics of asynchronous motor powered by an autonomous voltage inverter

2019 ◽  
Vol 643 ◽  
pp. 012022 ◽  
Author(s):  
N A Korolev ◽  
S V Solovev ◽  
Y L Zhukovskiy
Keyword(s):  
Asynchronous Motor ◽  
Voltage Inverter ◽  
Autonomous Voltage Inverter

scholarly journals Pulse-width modulation in the autonomous voltage inverter in identifying parameters of the three-phase asynchronous motor

2021 ◽  
Vol 288 ◽  
pp. 01054
Author(s):  
Valery Makarov ◽  
Veronika Zagirova ◽  
Georgii Vagapov
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Asynchronous Motor ◽  
Phase Voltage ◽  
Third Order ◽  
Voltage Inverter ◽  
Pulsewidth Modulation ◽  
Three Phase ◽  
Autonomous Voltage Inverter ◽  
Butterworth Filters

This paper deals with control algorithm of a two-level autonomous voltage inverter with pulsewidth modulation in forming test phase voltages for identification of parameters of a three-phase asynchronous motor. Necessary conversion is carried out, the laws of change of phase voltages of an autonomous inverter are obtained. The feasibility of using third order active Butterworth filters for determining first harmonics of phase voltages is shown. By means of computer simulation and experimental research, it is revealed that the required shapes of phase voltages can be implemented in a twolevel autonomous voltage inverter with pulse-width modulation, and the presence of Butterworth filters does not introduce significant distortion and allows to obtain necessary phase voltage shapes in the generalized electric machine.

scholarly journals THE STABILIZATION ACCURACY OF THE PHASE POSITION OF THE WORKING BODY OF THE ROBOTICS COMPLEX

2020 ◽  
pp. 20-28
Author(s):  
А. Denisov ◽  
Y. Denisov ◽  
O. Bursala
Keyword(s):  
Control System ◽  
Electric Drive ◽  
Pid Controller ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Optimal Operation ◽  
Voltage Inverter ◽  
Operation Speed ◽  
The Moment ◽  
Autonomous Voltage Inverter

To stabilize the phase position of the working body of the robotics complex a single-circuit precision electric drive system was developed based on the principle of phase-locked loop. The direct-driven electric drive is made on the basis of brushless direct current motor, which is switched to synchronous mode with minimal discrepancy between the phases of the reference signals and the pulse speed sensor. The phase error signal is fed to the input of the PID controller, which controls the pulse width modulation of the impulses controlling the operation of the power transistors of the autonomous voltage inverter. In a static mode, the control system of the autonomous voltage inverter implements a sinusoidal law of the pulse width modulation of the output pulses. The PID controller and the control system of the autonomous voltage inverter are programmatically implemented on the basis of the controller. In the process of analysing of the stabilization accuracy, the synchronous motor is represented by a second-order linear link, which establishes a relation between the phase deviations of the motor rotor and the stator magnetic field. The autonomous voltage inverter is represented by a zero-order hold whose coefficient of amplification on amplitude is found by the results of the approximation of its output voltage using the Walsh-Fourier series. The analysis of the phase stabilization process is performed on the basis of the state variables method taking into account the perturbations at the moment of load using the program which implements the recurrent procedure. The settings of the PID controller are determined by the variation results when the moment of load changes. Their initial values ​​are determined as a result of optimizing the system in terms of operation speed considering the condition of finite duration processes. It is assumed that there is no moment of load perturbation. The procedure for setting the PID controller parameters to the optimal operation speed mode can also be performed on the basis of neural networks. As a result of the calculations, it was found that with an increase of the load moment by 5%, the maximum deviation of the rotor phase was 0.22 us and 0.03 us of minimum deviation respectively.

Analysis of the effect of higher harmonics on the power supply of the induction motor from the autonomous voltage inverter in simulink.

2020 ◽  
Vol 14 (1) ◽  
pp. 70-73
Author(s):  
D. KARDASH ◽  
◽  
N. TIUTIUNNYK ◽  
Keyword(s):  
Induction Motor ◽  
Asynchronous Motor ◽  
Sine Wave ◽  
Nonlinear Distortions ◽  
Speed Up ◽  
Passport Data ◽  
Autonomous Voltage Inverter ◽  
Current Transients ◽  
Motor Model ◽  
Fft Analysis

Autonomous voltage inverters(AVI) of three-level and two-level topologies power supplying an induction motor are considered in this article. The influence of the carrier frequency and the structure of the AVI on the shape of the current sine wave is analyzed. A comparison of the values of the coefficient of nonlinear distortions under the same conditions is made. The results are obtained using FFT Analysis in Simulink. The parameters of the induction motor have been calculated, the transient torque, velocity, and current transients of the motor stator and rotor have been obtained and compared. During operation, the engine, besides useful work, releases heat. This effect accompanies it throughout its operation, but overheating shortens the overall life of the machine. The presence of harmonics in the applied voltage can lead to excessive heating. Therefore, the purpose of this article was to compare the topologies of autonomous voltage inverters and to evaluate the effect on electrical and electromechanical motor performance in transients. Three-level AVI diagram of operation is considered. Technique from the aricle by Moshchinsky et al. was used to obtain unknown engine parameters based on passport data. The transients in the asynchronous motor make it clear that the autonomous inverters of both topologies at the tested frequencies make Simulink motor model to speed up to a nominal speed with about equal efficiency, which does not eliminate the fact that the shape of the currents and the electromagnetic torque is significantly distorted. The state of the machine and the losses in the transitional as well as the steady modes require further, more detailed study in the context of other articles.

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