SU976400A1 - Device for measuring power supply source switching on and off transitional process time - Google Patents

Description

The invention relates to a measurement technique and can be used to control the transient characteristics of power sources.

 A device for measuring the rise time of a signal within a predetermined interval of values is known, comprising a threshold circuit, binary counters, a clock generator, a digital indicator and a control unit f 1,

A disadvantage of this device is a significant measurement error due to the lack of measurement capability of the transient process, since the actual supply voltage to the monitored

SOURCE 1IR.

The closest technical solution to the invention is a device for capturing the external characteristics of a constant current source containing a device registered by the oscilloscope; a key, a capacitor, an ammeter, a voltmeter, a control unit, and resistors 2.

A disadvantage of the known device is a significant measurement error due to the lack of measurement of the actual rise time.

the output voltage of the power source after it is turned on and due to the time delay of this voltage to synchronize the oscilloscope. The aim of the invention is to increase the accuracy of measurements of the time of the power supply output to the nominal mode.

The goal is achieved by incorporating a transformer and a rectifying bridge into the device for measuring the time of transients of switching on and off of power sources containing an oscilloscope whose signal inputs are connected to the output terminals of the device, a switch, a resistor and a capacitor. The pins of one of the diagonals of the rectifying bridge are connected to the secondary

20 by a transformer winding, and the outputs of the second diagonal of the bridge are connected to the synchronization inputs of the oscilloscope, the first output of the primary winding of the transformer is connected to one of the terminals 25 of the Network device and to the input of the key, and the second output of the primary winding of the transformer is connected to one of the input the terminals of the device and the first terminal of the resistor, the second terminal of which is connected to the second input terminal of the device and the second terminal of the device Network;

The drawing shows a diagram of the device. . The device contains a driver

1 impulses, start-up, consisting of a capacitor 2, the primary winding of the transformer 3, the secondary 9 winding

transformer 3 and rectifying device 4, oscilloscope 5, switch 6, resistor 7, controlled source 8, device output terminals 9 and 10, device input terminals 11 and 12, and device terminals 13 and 14 Network

The device works as follows.

When a primary power supply is applied to the voltage device (network; through terminals 13 and 14, when the key b is still open, the capacitor 2 of the driver 1 for the start-up pulses is charged to the network potential through a resistor 7 and the winding 15 of the transformer 3. At the moment of activation source 8 through the key closure 6 capacitor

2 is discharged through this key and the winding 15 of the transformer 3, induces a pulse in the winding 16, which through two diagonal diodes of the rectifying bridge 4 will be applied to the synchronization input of the oscilloscope 5 and will start scanning it. The oscilloscope will display the controlled source curve for the mode.

When the source is disconnected from the network (switch 6 is disconnected), capacitor 2 is again charged through resistor 7 and winding 15, exciting a pulse on winding 16. And although this time the pulse of the winding 15 will be of opposite polarity C compared to its polarity when the source 8J is turned on, it, having passed the output of the driver through another pair of diodes of a rectifying bridge 4, will have the same polarity as before, and restart the oscilloscope. Its screen will display the decay of the output voltage of source 8. In case the input resistance

source c. small, resistor 7 may be missing.

The advantages of the proposed device are

-Providing accurate measurement of the time of power supply output

the mode, while simultaneously running an oscilloscope sweep and applying voltage to the power supply input;

- measurement of transient processes at the source output, both when it is turned on and when turned off (with the same accuracy;

- generation of the oscilloscope synchronization pulse galvanically isolated from the input power source and from the network.

Invention Formula

A device for measuring the time of transients on and off of power sources, containing an oscilloscope, the signal inputs of which are connected to the output terminals of the device, a switch, a resistor and a capacitor, characterized in (THAT, in order to improve the accuracy of measurements, a transformer and a rectifier are introduced into it the bridge, while the outputs of one of the diagonals of the rectifying bridge are connected to the secondary transformer on-i coil, and the conclusions of the second bridge diagonal are connected to the input, the oscilloscope synchronization, first; The transformer primary winding terminal is connected to the Network terminal of the device and to the key input, and the second transformer primary winding terminal is connected via a capacitor to the 0 key output, to one of the device input terminals and to the first resistor terminal, the second terminal of which is connected to the second input terminal of the device and the second terminal of the device Network. 5 Sources of information taken into account during the examination

1. USSR Author's Certificate No. 477370, cl. G 01 R 29/02, 1973.

2. Authors certificate of the USSR. No. 382022, cl. G 01 R 29/00, 1971

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Claims (1)

Claim A device for measuring the time of transient processes on and off of power sources, containing an oscilloscope, signal inputs code. which are connected to the output terminals of the device, a key, a resistor and a capacitor, characterized in that (In order to increase the accuracy of measurements, a transformer and a rectifier bridge are inserted into it, while the diode from the diagonals of the rectifier bridge is connected to the secondary winding of the transformer, and the output of the second diagonal of the bridge is connected to the synchronization inputs of the oscilloscope, per35®; the first output of the primary winding of the transformer is connected to the terminal of the Network and to the key input, and the second output of the primary winding of the transformer is the capacitor is connected to the output 40 of the key, to one of the input terminals of the device and to the first output of the resistor ^ the second output of which is connected to the second input terminal of the device and the second terminal of the Network device.