CN110854834A - Method for improving voltage reduction speed of power supply and bleeder circuit - Google Patents
Method for improving voltage reduction speed of power supply and bleeder circuit Download PDFInfo
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- CN110854834A CN110854834A CN201911157160.6A CN201911157160A CN110854834A CN 110854834 A CN110854834 A CN 110854834A CN 201911157160 A CN201911157160 A CN 201911157160A CN 110854834 A CN110854834 A CN 110854834A
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- power supply
- solid
- bleeder
- switch
- resistor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2822—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere of microwave or radiofrequency circuits
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a method for improving the voltage reduction speed of a power supply and a bleeder circuit, wherein the bleeder circuit is connected to the power supply and comprises a plurality of groups of solid-state switches connected in parallel, and a bleeder resistor is connected to one group of solid-state switches. The bleeder circuit is connected in parallel at two ends of the power supply to improve the voltage reduction speed of the power supply, and the method comprises the following steps: firstly, connecting a plurality of solid-state switches to two ends of a power supply in parallel, and then connecting a solid-state switch connected with a bleeder resistor in series; step two, when the power supply is turned off, all the contacts of the solid-state switch are closed to form a loop between the power supply and the solid-state switch; and step three, connecting the solid-state switch containing the bleeder resistor to the resistor to be matched according to the magnitude of the power supply voltage. According to the method for improving the voltage reduction speed of the power supply and the bleeder circuit, the bleeder circuit is additionally arranged on the power supply, when the voltage is switched to be closed, the voltage of the power supply can be quickly reduced to 0V under the action of the bleeder circuit, and the detection efficiency is improved in the detection process of the integrated circuit.
Description
Technical Field
The invention relates to the technical field of performance test of radio frequency integrated circuit chips, in particular to a method for improving the voltage reduction speed of a power supply.
Background
The method of reducing the voltage is to switch the power supply to the off state only when the circuit is stopped, and the power supply will slowly become 0V. For example, the source voltage is 220V, and after the power is turned off, the voltage does not drop to 0V instantly, and in a slow time, it may take about 2s to return to 0 completely. In the integrated circuit testing technology, the requirement on the testing speed is high, and the too low voltage reduction of the power supply becomes a bottleneck influencing the DC testing speed. The conventional power supply has low voltage reduction speed and cannot fully utilize time to test.
Disclosure of Invention
In order to solve the technical problems of the background art, the present invention provides a method for increasing the voltage reduction speed of a power supply, in which a bleeder circuit is added to the power supply, and when the voltage is switched to be off, the voltage of the power supply can be quickly reduced to 0V under the action of the bleeder circuit.
In order to achieve the technical purpose, the technical scheme of the invention is as follows: the bleeder circuit is connected to a power supply and comprises a plurality of groups of solid-state switches connected in parallel, wherein a bleeder resistor is connected in parallel in one group of solid-state switches.
Further, the solid-state switch is divided into a first solid-state switch and a second solid-state switch, wherein the first solid-state switch is connected with a bleeder resistor, and the first solid-state switch is connected with the second solid-state switch in series.
Further, the first solid-state switch comprises at least 3 groups of bleeder resistors connected in parallel, each group comprises at least 3 bleeder resistors with different resistances, and the switch is connected with the matched bleeder resistors according to the size of the power supply voltage.
Preferably, each set of second solid state switches comprises at least 3 sets of switch contacts, each set of switch contacts comprising a stationary contact and two moving contacts.
The invention also provides a discharge method of the discharge circuit for improving the voltage reduction speed of the power supply, the discharge method improves the voltage reduction speed of the power supply by connecting discharge resistors in parallel at two ends of a tested piece so that the discharge resistors, the power supply and the switch form the discharge circuit, and the method specifically comprises the following steps:
firstly, connecting a plurality of solid-state switches to two ends of a power supply in parallel, and then connecting a solid-state switch connected with a bleeder resistor in series;
step two, when the power supply is turned off, all the contacts of the solid-state switch are closed to form a loop between the power supply and the solid-state switch;
and step three, connecting the solid-state switch containing the bleeder resistor to the resistor to be matched according to the magnitude of the power supply voltage.
Further, in the third step, the larger the power supply voltage is, the larger the resistance value of the corresponding resistor is.
Preferably, the solid-state switches comprise at least 3 groups.
After adopting the scheme, compared with the prior art, the invention has the following beneficial effects:
1. the solid-state switch with long service life selects the form of a plurality of groups of solid-state switches connected in parallel to the circuit in consideration of the problem of power limitation, and the total power bearable by the discharge circuit is increased.
2. The resistor of the bleeder circuit is not fixed and unchanged, the resistor with the smaller resistance is arranged when the voltage is lower, and the resistor with the larger resistance is arranged when the voltage is higher, so that the bleeder is accelerated, and the total constant-power bleeder is achieved.
Drawings
Fig. 1 is a circuit configuration diagram of embodiment 1 of the present invention;
FIG. 2 is a graph of voltage drop after power is turned off without the bleeder circuit;
fig. 3 and 4 are graphs showing the voltage drop after the power supply is turned off under the condition that the bleeder circuit is added.
Detailed Description
The invention will be further explained with reference to the drawings and the specific examples below:
example 1
The invention provides a bleeder circuit for improving the voltage reduction speed of a power supply, which is connected to the power supply and comprises a plurality of groups of solid-state switches connected in parallel, wherein a bleeder resistor is connected in series in one group of solid-state switches. The solid-state switch is divided into a first solid-state switch and a second solid-state switch, wherein the first solid-state switch is connected with a bleeder resistor, and the first solid-state switch is connected with the second solid-state switch in series.
The first solid-state switch comprises at least 3 groups of bleeder resistors connected in parallel, each group comprises at least 3 bleeder resistors with different resistance values, and the switch is connected with the matched bleeder resistors according to the size of the power supply voltage. As shown in fig. 1, the first solid-state switch comprises 3 sets of bleed resistors, with 3 resistors of different values in each set. Each group of the second solid-state switches comprises at least 3 groups of switch contacts, and each group of the switch contacts comprises a fixed contact and two movable contacts.
The left side of the dotted line in fig. 1 shows a bleeder circuit, which is composed of 9 switches, a power supply and 9 resistors, each switch is a same solid-state switch, 3 of the 9 resistors have the same R1 resistance, 3 of the resistors have the same R2 resistance, and 3 of the resistors have the same R3 resistance.
And S1-S6 are all adjusted to 1 in the initial state, the circuit is normally powered on and is not connected with a bleeder resistor, and when the power supply is powered off, S1-S6 are all adjusted to 2, the tested element is disconnected and is connected with the bleeder resistor.
The bleed current of 1A is generally guaranteed.
When the total voltage of the power supply is 50V, the total resistance value of the bleeder resistor is 50 omega, at the moment, S7-S8 are all connected with 1, the circuit is connected with 3R 1, and R1 is 150 omega;
when the voltage drop is 30V, the total resistance value of the bleeder circuit is 30 omega, S7-S8 are all connected to 2, and R2 is 90 omega;
when the voltage drop is 10V, the total resistance of the bleeder circuit is 10 omega, S7-S8 are all connected to 3, and R3 is 30 omega.
The voltage was monitored by two devices (not shown) that monitor the voltage in real time, and then immediately adjusted to R2 when the voltage dropped to 30V and R3 when the voltage dropped to 10V.
The solid-state switches are used for switches in the circuit, all mechanical switches have service life problems, the circuit switches are all solid-state switches in consideration of the problem that the service life of the mechanical switches is short, and due to the fact that the solid-state switches are limited in power, multiple groups of solid-state switches can be selected to be connected in parallel to increase the total bearable power of the circuit as required. Three switches are shown connected in parallel, the number of switches depending on the particular situation.
The speed of bleeding is related to the voltage, when the voltage is higher, the bleeding resistance provided by us is higher, when the voltage is lower, the bleeding resistance provided by us is smaller, the bleeding is accelerated, and generally, the constant-power bleeding is expected to be achieved. As shown in fig. 1, three resistors are connected in parallel, one switch is used for controlling and connecting the related resistors, and the number of the resistors and the corresponding resistance value are specifically set.
The voltage drop after the power supply is turned off under normal conditions is shown in fig. 2, if a bleeder circuit is added and the resistance is adjusted 3 times, the voltage drop of the power supply is shown in fig. 3, and the voltage drop is faster after the bleeder circuit is added, and the specific data is shown in fig. 4.
Example 2
The invention also provides a method for improving the voltage reduction speed of the power supply by adopting the bleeder circuit, wherein the bleeder method improves the voltage reduction speed of the power supply by connecting the bleeder circuit in parallel at two ends of the power supply, and the method specifically comprises the following steps:
firstly, connecting a plurality of solid-state switches to two ends of a power supply in parallel, and connecting one solid-state switch connected with a bleeder resistor in series;
step two, when the power supply is turned off, all the contacts of the solid-state switch are closed to form a loop between the power supply and the solid-state switch;
and step three, connecting the solid-state switch containing the bleeder resistor to the resistor to be matched according to the magnitude of the power supply voltage.
The larger the power supply voltage is, the larger the resistance value of the corresponding resistor is; the solid state switches include at least three groups.
When the original circuit works, the switch S1 and the switch S2 are both connected with 1, and the circuit works normally. When the power supply is switched to the off state, the switch S1 and the switch S2 are all switched to be connected with the resistor 2, the connection of the switch S3 and the resistor depends on the voltage of the original circuit, when the voltage is higher, the resistor with larger resistance is connected, and when the voltage is lower, the resistor with smaller resistance is connected. Because the sliding rheostat is not adopted, the resistance value cannot be very accurate, and the constant power leakage can be kept as a whole. After the switch is switched, the access resistor can quickly consume the residual voltage, so that the voltage can be quickly reduced to 0. When the original circuit is recovered, the switch S1 and the switch S2 are connected to 1 again after the power supply is switched to the working state.
The bleeding process for the circuit of fig. 1 is carried out using the method described above as follows:
when the power supply is turned off, the initial states of S1-S6 are all adjusted to 1, the circuit supplies power normally, no bleeder resistor is connected, when the power supply is cut off, the states of S1-S6 are all adjusted to 2, the tested piece is disconnected, and the bleeder resistor is connected to the part of the bleeder resistor.
The bleed current of 1A is generally guaranteed.
When the total voltage of the power supply is 50V, the total resistance value of the bleeder resistor is 50 omega, at the moment, S7-S8 are all connected with 1, the circuit is connected with 3R 1, and R1 is 150 omega;
when the voltage drop is 30V, the total resistance value of the bleeder circuit is 30 omega, S7-S8 are all connected to 2, and R2 is 90 omega;
when the voltage drop is 10V, the total resistance of the bleeder circuit is 10 omega, S7-S8 are all connected to 3, and R3 is 30 omega.
While the above embodiments are merely preferred embodiments of the present invention, it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should be regarded as the protection scope of the present invention. The components not specified in this embodiment can be implemented by the prior art.
Claims (7)
1. The bleeder circuit is connected to a power supply and comprises a plurality of groups of solid-state switches connected in parallel, wherein a bleeder resistor is connected to one group of solid-state switches.
2. The bleeder circuit for increasing the voltage step-down speed of a power supply as claimed in claim 1, wherein said solid state switches are divided into a first solid state switch and a second solid state switch, wherein a bleeder resistor is connected in the first solid state switch, and the first solid state switch is connected in series with the second solid state switch.
3. The bleeder circuit for increasing the voltage step-down speed of a power supply as claimed in claim 2, wherein said first solid-state switch comprises at least 3 groups of bleeder resistors connected in parallel, each group comprises at least 3 bleeder resistors with different resistances, and the switch is connected to the matched bleeder resistor according to the magnitude of the power supply voltage.
4. The bleeder circuit for increasing the speed of dropping a power supply of claim 2, wherein each group of the second solid state switches comprises at least 3 groups of switch contacts, each group of switch contacts comprising a stationary contact and two moving contacts.
5. The method for releasing the bleeder circuit for increasing the power supply voltage reduction speed according to claim 1, wherein the method for releasing increases the power supply voltage reduction speed by connecting a bleeder resistor in parallel at two ends of a tested piece so that the bleeder resistor, the power supply and the switch form the bleeder circuit, and the method specifically comprises the following steps:
firstly, connecting a plurality of solid-state switches to two ends of a power supply in parallel, and then connecting a solid-state switch connected with a bleeder resistor in series;
step two, when the power supply is turned off, all the contacts of the solid-state switch are closed to form a loop between the power supply and the solid-state switch;
and step three, connecting the solid-state switch containing the bleeder resistor to the resistor to be matched according to the magnitude of the power supply voltage.
6. The bleeding method according to claim 5, wherein in the third step, the larger the power supply voltage, the larger the resistance of the corresponding resistor.
7. The bleeding method of claim 5, wherein the solid state switches comprise at least 3 groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911157160.6A CN110854834A (en) | 2019-11-22 | 2019-11-22 | Method for improving voltage reduction speed of power supply and bleeder circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911157160.6A CN110854834A (en) | 2019-11-22 | 2019-11-22 | Method for improving voltage reduction speed of power supply and bleeder circuit |
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| CN110854834A true CN110854834A (en) | 2020-02-28 |
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| CN201911157160.6A Pending CN110854834A (en) | 2019-11-22 | 2019-11-22 | Method for improving voltage reduction speed of power supply and bleeder circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202079840U (en) * | 2011-05-23 | 2011-12-21 | 冠宏股份有限公司 | Novel anti-mosquito fabric |
| CN202495761U (en) * | 2012-03-08 | 2012-10-17 | 北京科锐配电自动化股份有限公司 | Capacitor constant power discharge circuit |
| CN106653357A (en) * | 2017-01-04 | 2017-05-10 | 中国人民解放军国防科学技术大学 | High-voltage capacitor quasi-constant-power discharging apparatus with adjustable discharging power |
| CN206349785U (en) * | 2016-12-26 | 2017-07-21 | 浙江万马新能源有限公司 | A kind of active leadage circuit of invariable power |
| CN110233509A (en) * | 2019-06-07 | 2019-09-13 | 中车永济电机有限公司 | Vehicle motor controller bus capacitor leadage circuit |
-
2019
- 2019-11-22 CN CN201911157160.6A patent/CN110854834A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202079840U (en) * | 2011-05-23 | 2011-12-21 | 冠宏股份有限公司 | Novel anti-mosquito fabric |
| CN202495761U (en) * | 2012-03-08 | 2012-10-17 | 北京科锐配电自动化股份有限公司 | Capacitor constant power discharge circuit |
| CN206349785U (en) * | 2016-12-26 | 2017-07-21 | 浙江万马新能源有限公司 | A kind of active leadage circuit of invariable power |
| CN106653357A (en) * | 2017-01-04 | 2017-05-10 | 中国人民解放军国防科学技术大学 | High-voltage capacitor quasi-constant-power discharging apparatus with adjustable discharging power |
| CN110233509A (en) * | 2019-06-07 | 2019-09-13 | 中车永济电机有限公司 | Vehicle motor controller bus capacitor leadage circuit |
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Application publication date: 20200228 |
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