SU1504632A1 - Method of testing voltage stabilizers - Google Patents

Abstract

The invention relates to measuring instrumentation and can be used for testing voltage regulators. The purpose of the invention is to increase the reliability of verification of marginal health and resource assessment — this is achieved by more precise setting of verification regimes at which the stabilizer may fail. The method is based on testing a sample of controlled type stabilizers in the forced mode, which consists in cyclic synchronously modulated impact of the supply voltage from the maximum, predetermined or determined experimentally, to the minimum. In this case, the load current is set to the minimum. The load current is then changed from maximum to average with minimum supply voltage. The device that implements the method includes a driver 1 for power supply changes, drivers 2.1 ..2N control signals, drivers 3.1 ... 3N voltage control signals, driver 4 cyclicities, driver 5 test programs, control unit 6, voltage switch 7, switch 8, power supply 9, measuring unit 10 and controlled voltage regulators 11.1 ... 11N (control objects). 1 il.

Description

the load current sets a minimum of 20, 7, the output of which is connected to the first

nym. Similar tests are then performed by changing the load current from maximum to average with minimum supply voltage. At the same time, the stability of the stabilizer is checked in each cycle as the load current changes from minimum to maximum value 1-n. If the stability of the stabilizer is broken, its failure is recorded and excluded from the test. In addition, at the end of each cycle, the transient characteristics of each test stabilizer are measured, compared with the maximum specified, and when they are also transformed

fix stabilizer failure. On the basis of the measurements made and the number of failed stabilizers, the acceleration coefficient of stabilizers of this type is determined and tests are performed for each stabilizer of this type for a time corresponding to the obtained acceleration coefficient. According to the results of the explosions, the limiting working capacity and resource are estimated, which are determined by the number of failed stabilizers.

The device that implements the method shown in the drawing

The device contains a driver 1 changes the supply voltage (FIPN), drivers 2.1, .., 2.N control signals of current (FCST) drivers 3.1, ..., 3-.N control voltage signals (FCCN), driver 4 cyclicity (FC), shaper 5 test programs (FPI), block 6 of control 5, switch 7 voltage

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the inputs of the control objects 11.1, ... 11, N. The second inputs of the control objects 11 о 1, ..., 11.N are connected to the corresponding outputs of the FKSN 3.1, ..., 3.N. The output of the power source 9 is connected to the second inputs of the FKSN 3.1, ".. 3.N and the second inputs of the FC 4 and FIPN 1. The first output of the control unit 6 is connected to the input of the FPI 5, the second output - to the first input of the switch 8, the third and fourth outputs which are connected to the corresponding outputs. Control objects 11.1, .., 11.N and FKST 2.1,.,., 2.N. The output of the switch 8 is connected to the input of the block 10.

The testing of voltage regulators 11.1, ..., 11.N with a device is carried out in three stages. The first step is to prepare the device. In this case, depending on the types of voltage stabilizers under test, the required values of the parameters of the control signals are set, and the sequence of their actions is selected.

At the second stage, the effects are formed in the form of a sequence of pulses or cycles, which is carried out by the FCST 2.1, ..., 2.N, FCCN 3 with 15 ... j3.N and FC 4 with the help of the FPI 5 commands.

The third step is to determine the measurement of the monitored parameter of the stabilizers 11.1, ..., 11. The voltage applied through the switch 8 by the measuring unit 10, and to carry out further tests with an acceleration factor corresponding to the given effect of the program and controlled by the FPI 5 and control unit 6.

Claims (1)

Invention Formula The method of testing voltage stabilizers, concluded that when testing a sample of stabilizers of a controlled type, pulsed and cyclically varying supply voltage and load current are used, transient characteristics are determined and judged by the number of failures of the stabilizers, characterized by the fact that, in order to increase the reliability of the marginal health check and resource assessment, each stabilizer is tested in a forced mode, consisting in a cyclically synchronous modulated from maximum to minimum supply voltage at minimum load current, and then from maximum to the average value of the load current at the minimum supply voltage, check the stability of the stabilizer in each cycle when the load current synchronously changes from minimum to maximum value, fix the stabilizer failure, eliminate the failed stabilizer from the tests, measure the transient characteristics of each stabilizer at the end of each cycle, compare them with the limit given values, fix the stabilizer failure, eliminate the failed stabilizer from the tests, from the obtained values of the parameters dnyh characteristics determined acceleration coefficient stabilizers of this type, for each type of the test stabilizers is carried out for a time sootvetstvukndego obtained acceleration coefficient, and evaluate performance and resource limit on the number of failed stabilizers.