JPS5925026Y2 - Voltage regulator testing equipment - Google Patents

Description

[Detailed description of the invention] The present invention is a test device for voltage regulators, especially voltage regulators used in generators, which are tested through a test circuit that simulates a generator, thereby improving generator operation. The present invention relates to a voltage regulator testing device that can detect and display abnormalities in a single voltage regulator under the same conditions as the current condition.

Generally, a voltage regulator used in an engine-driving generator or the like is built into, for example, a recessed portion of the generator frame, and is configured integrally with the generator.

Moreover, its operation detects the magnitude of the output voltage of the generator, and when the output voltage is higher than a preset reference value,
The field current control transistor inserted in the field winding circuit is turned off to cut off the field current and wait for the output voltage to drop.

On the other hand, when the output voltage drops and becomes smaller than a preset reference value, the field current control transistor is turned on to increase the field current and waits for the output voltage to increase.

By repeating the above operations, the output voltage is kept within a predetermined range.

As mentioned above, the generator and voltage regulator are inseparable, so when testing the voltage regulator, a test device must be prepared that has the same conditions as the generator, regardless of whether it is normal or abnormal.

This invention was developed with the aim of solving the above problem, and it is possible to simulate the same conditions as a generator using a commercial power source and a transformer, and conduct tests under various conditions by switching switches. The purpose of the present invention is to provide a test device for a voltage regulator.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a wiring diagram of a test device for a voltage regulator according to the present invention, and FIG. 2 is a wiring diagram of a conventionally known voltage regulator.

In this case, for convenience of explanation, the test device (FIG. 1) and the voltage regulator (FIG. 2) are shown in the connection state during the test.

1 is a test device surrounded by a dashed line.

2 is a transformer, which is connected to commercial power supply X and Y terminals via a power switch SW1.

SW2 is an input selector switch that can select each of the input voltages shown in the figure.

SW3 is a changeover switch and is a voltage regulator under test (hereinafter referred to as A).
This is a switch that can be switched according to the A and B models of the VR (referred to as VR).

By the way, in this invention, the detection voltage of 70■ is A type, 17V.
is called type B.

Reference numeral 3 denotes a detection winding provided on the secondary side of the transformer 2, which corresponds to the output voltage terminal of the generator, and generates the various type voltages shown.

4 corresponds to the sub-winding of the generator as above, and is
It becomes the power source.

SW4 is an automatic return type double switch and is 5W4-1.
, 5W4-2, and is used to determine which type of AVR is described above, and is normally in contact with contact 1 shown in the figure.

SW5 is a triple switch, 5W5-1, 5W5-2
, 5W5-3.

SW6 is a quadruple switch, 5W6-1, 5W6-2
, 5W6-3° interlocks with 5W6-4.

5.6.7. ,9. are light emitting diodes, and 6
, 7 emit green light, and 8.9 emit red light.

10 is a Zener diode, 11 is a rectifier, 12.13
．． 14, 15, 16, 17, 18 are resistors, in particular 12 simulates the field winding of a generator.

19 is a capacitor, and 20, 21, 22, and 23 degrees are diodes.

80V is applied to the detection winding 3 on the secondary side of the transformer 2.
25V and 13V taps are available,
These supply power with a voltage value slightly higher and a voltage value slightly lower than the detection voltage of the AVR under test having each of the above-mentioned types.

Similarly, the winding 4 on the secondary side of the transformer 2 has 60V, 3.
There are 5V taps, and the 60V tap is used as an operating power source for the AVR under test, and the 3.5V tap is used for testing the rise characteristics as described below.

The one shown in Figure 2 is a conventionally well-known voltage regulator.
24.25 is a rectifier, 26.27.28 is a transistor, especially 26 is a field current control transistor for turning on and off the field winding current, 29 is a Zener diode, S is a voltage dividing point, 1. m, n, o.

p, g, r are on the test equipment side, l', m',
n', O', p'.

gZ r/ indicates each terminal on the AVR side.

The basic operating principle of this invention is that the detection terminal g of the AVR
When voltages slightly higher and lower than the detection voltage value are applied to Z'', the AVR's field current control transistor 26 turns on and off, which is displayed by flashing light emitting diodes. This is intended to cause the light to turn on in red.

Next, the test and testing process will be explained in each case with reference to the wiring diagrams shown in FIGS. 1 and 2.

■ Type determination power switch SW1 of the test AVR. Close SW2 and connect the power source to the transformer.

The double switches 5W4-1 and 5W4-2 are switched from the contact 1 side to the contact 2 side to apply a detection voltage of 80V to the AVR.

At this time, if the light emitting diode 5 lights up, the AVR is of type B.

As mentioned above, since the detection voltage of the B type is 17V, the voltage dividing resistance value is small, so a large current flows through the resistor 13, and the voltage drop due to the resistor 13 turns on the Zener diode 10. This is because the light emitting diode 5 is turned on.On the other hand, type A has a large voltage dividing resistance value, so a small current flows through the resistor 13, and the voltage drop caused by the resistor 13 cannot turn on the Zener diode 10. It is.

■ Testing of field current control transistor (low voltage) above ■
If it is determined that the AVR under test is of the B type, the selector switch SW3 is set to the B contact side.

In this case, since the double switch SW4 described above is of an automatic return type, both 5W4-1 and 5W4-2 are in contact with the contact 1 side.

On the other hand, triple switch SW5. ~5W5-3 and the quadruple switches 5W6-1 to 5W6-4 are all in contact with contact 1.

Therefore, the test AVR had SW6. A voltage of 13V, which is slightly smaller than the detection voltage of 17■, is applied through the
If VR is normal, the detector 28 will not turn on, so the rectifier 24 → 5W6-4 → light emitting diode 6 →
A current flows through the circuit of 5W5-2→field current control transistor 26→rectifier 24, causing the light emitting diode 6 to light up in green to indicate good condition.

Also, if the field current control transistor 26 is defective,
Rectifier 24 → Resistor 12 → Light emitting diode 8 → 5W6-3
→A current flows through the circuit of the rectifier 24, causing the light emitting diode 8 to light up in red, indicating a defect.

The above is a test in which a voltage slightly lower than the detection voltage was applied.

(2) While keeping the field current control transistor test (high voltage) switch SW3 set to the B contact side, switch the quadruple switches 5W6-1 to 5W6-4 to the contact 2 side.

In this state, the test AVR is set to SW6. Detection voltage 17 through
A voltage of 25V, which is slightly higher than V, is applied.

If the AVR under test is normal, the field current control transistor 26 should be turned off.

Therefore, no current flows from the rectifier 24 and none of the light emitting diodes light up.

However, if the field current control transistor 26 is defective (Show 1~), the rectifier 24 → 5W6-3 → light emitting diode 8 → resistor 17 → field current control transistor 26 →
A current flows through the rectifier 24, lighting up the light emitting diode 8 in red, indicating a defect.

The above is a test in which a voltage slightly higher than the detection voltage was applied.

■ AVR rise characteristic test 1 @ Put the triple switches 5W5-1 to 5W5-3 on the contact 2 side and connect the 3.5-inch tap of the winding 4 to the rectifier 2 in the test AVR.
Connect to 4.

3.5■ corresponds to the voltage value generated only by residual magnetism when the generator is rotating at its rated speed, and this voltage is used to determine the deterioration state of the AVR.

If the start-up characteristics are good in this state (that is, if the AVR operates normally), the field current control transistor 26 is turned on, so the rectifier 24 -> light emitting diode 7 -> 5W5-2 -> field current control transistor 26 is turned on. A current flows from the transistor 26 to the rectifier 24, lighting up the light emitting diode 7 in green, indicating that the condition is good.

However, if there is a startup failure, that is, if the field current control transistor 26 is in the off state, the rectifier 24 → the resistor 12
→5W5-2→Light-emitting diode 9→5W5-3→Current flows through the rectifier 24, lighting up the light-emitting diode 9 in red, indicating a startup failure.

Although the above explanation was based on the 3.5V tap on the winding 4, it is of course possible to test various rise characteristics depending on the model by using a volume configuration without being limited to a fixed tap. It is.

When testing type A, selector switch SW3
Of course, it is also possible to perform the same test as above by putting it on the A side.

As explained above, the present invention simulates a generator using a commercial power source and a transformer with multiple taps, and also generates electricity including a start-up test at a voltage corresponding to the generator's residual magnetism by switching the taps of the transformer. Since it was configured to simulate various operating conditions of the generator, it was possible to test the voltage regulator alone, which operates in unison with the generator.

In addition, the model of the voltage regulator can be easily determined, and tests tailored to each model can be performed.

[Brief explanation of drawings]

FIG. 1 is a wiring diagram showing a test device for a voltage regulator according to the present invention, and FIG. 2 is a wiring diagram showing a conventionally known voltage regulator. In the figure, 1 is a test device, 2 is a transformer, 3 is a detection winding, 4 is a sub-winding, 5 to 9 are light emitting diodes, 10 is a Zener diode, 11 is a rectifier, 12 to 18 are resistors, 20 to 23
is a diode, SW3 is a changeover switch, SW4 is a 2-switch, SW5 is a 3-switch, and SW6 is a 4-switch.

Claims (1)

[Scope of utility model registration request] A type check circuit for discriminating the type of voltage regulator in a voltage regulator testing device that tests a voltage regulator integrated with a generator through a test circuit simulating the generator. In addition, a changeover switch for performing the check, a standard detection voltage Marimoya, a high test voltage, a slightly low test voltage determined for each of the above types, and a test voltage in the generator determined for each of the above types. A power supply section each having a voltage corresponding to the output voltage due to residual magnetism, an auxiliary power supply section for the voltage regulator, a resistance section simulating the field winding of a generator, and a mode corresponding to the type check and the low test. a transistor in the voltage regulator that turns on and off the field winding current corresponding to a voltage supply mode, a mode of supplying the high test voltage, and a mode of supplying the output voltage due to residual magnetism, respectively; A voltage regulator comprising a plurality of indicator lights for detecting abnormalities, and checking and displaying abnormalities in the voltage regulator by appropriately switching test circuits created according to each of the above modes. test equipment.