CN115395799A - High-power bidirectional rapid discharge circuit for inductance coil - Google Patents
High-power bidirectional rapid discharge circuit for inductance coil Download PDFInfo
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- CN115395799A CN115395799A CN202211066148.6A CN202211066148A CN115395799A CN 115395799 A CN115395799 A CN 115395799A CN 202211066148 A CN202211066148 A CN 202211066148A CN 115395799 A CN115395799 A CN 115395799A
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- voltage stabilizing
- diode
- stabilizing device
- inductance coil
- discharge circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a high-power bidirectional rapid discharge circuit for an inductance coil, which comprises a rectifier bridge, a voltage stabilizing device, a silicon controlled rectifier and a plurality of diodes D1, D2, … and DN which are connected in series, wherein the voltage stabilizing device, the plurality of diodes D1, D2, … and DN which are connected in series are sequentially connected in series to form a loop, the AC input end of the rectifier bridge is connected with two ends of a discharge inductance coil, the cathode of the voltage stabilizing device is connected with the anode of the diode D1, the DC + output end of the rectifier bridge is arranged between the cathode of the voltage stabilizing device and the anode of the diode D1, the anodes and the cathodes of the diodes are sequentially connected, the cathode of the diode DN is connected with the anode A of the silicon controlled rectifier, the cathode K of the silicon controlled rectifier is connected with the DC-output end of the rectifier bridge, and the control electrode G of the silicon controlled rectifier is connected with the anode of the voltage stabilizing device. The high-power bidirectional rapid discharge circuit for the inductance coil, which adopts the structure, has the advantages of high discharge speed and bidirectional discharge function.
Description
Technical Field
The invention relates to the field of analog circuits, in particular to a high-power bidirectional rapid discharge circuit for an inductance coil.
Background
When measuring electrical parameters of inductive coils such as transformers and reactors, a certain current needs to be applied to the inductive coils, and after the measurement is finished, the energy of the inductive coils needs to be released because the inductors have the energy storage characteristic. As shown in fig. 1, the conventional simple discharging device is formed by connecting a diode (D) with a resistor (R) in series, and the diode (D) has a unidirectional conductivity, so that the discharging device does not affect normal measurement.
The patent of the granted publication number CN201965164U provides an inductance coil discharge circuit, which adopts a field effect transistor to realize a quasi-constant voltage discharge characteristic, the discharge voltage of the inductance coil discharge circuit is mainly determined by the rated voltage of a voltage stabilizing diode, and because a single field effect transistor has limited power and weak overload capacity, the inductance coil discharge circuit is only suitable for medium-low power discharge occasions.
In the two methods, the loop is connected with the diode in series, so that the method is only suitable for a one-way discharge mode with a direct current power supply, and if an alternating current power supply is adopted, the purposes of measurement and discharge cannot be realized.
Disclosure of Invention
The invention aims to provide a high-power bidirectional quick discharge circuit for an inductance coil, which has high discharge speed and bidirectional discharge function.
In order to achieve the purpose, the invention provides a high-power bidirectional fast discharge circuit for an inductance coil, which comprises a rectifier bridge, a voltage stabilizing device, a controllable silicon and a plurality of diodes D1, D2, … and DN which are connected in series, wherein the voltage stabilizing device, the diodes D1, D2, … and DN which are connected in series are sequentially connected in series to form a loop, an AC input end of the rectifier bridge is connected with two ends of a discharge inductance coil, a cathode of the voltage stabilizing device is connected with an anode of the diode D1, a DC + output end of the rectifier bridge is arranged between a cathode of the voltage stabilizing device and the anode of the diode D1, anodes and cathodes of the diodes DN are sequentially connected, a cathode K of the controllable silicon is connected with an anode A of the controllable silicon, and a control electrode G of the controllable silicon is connected with the anode of the voltage stabilizing device.
Preferably, the voltage stabilizing device is a voltage stabilizing diode U1, a transient suppression diode or a voltage dependent resistor.
Preferably, a resistor R1 is arranged between the control electrode G and the cathode K of the thyristor.
Therefore, the high-power bidirectional rapid discharge circuit for the inductance coil, which adopts the structure, has higher power and stronger overcurrent capacity compared with a field effect tube, can meet the discharge requirement of higher power, and can be suitable for a bidirectional discharge circuit of a non-direct-current power supply.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic diagram of a conventional simple discharge circuit;
FIG. 2 is a schematic circuit diagram of an embodiment of a high power bidirectional fast discharge circuit for an inductor according to the present invention;
fig. 3 is a schematic diagram of a practical circuit of the embodiment of the invention.
Detailed Description
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Examples
As shown in fig. 2, a high-power bidirectional fast discharge circuit for an inductor comprises a rectifier bridge, a voltage regulator device, a thyristor and a plurality of diodes D1, D2, …, DN connected in series, wherein the voltage regulator device is a voltage regulator diode U1, a transient suppression diode or a voltage dependent resistor, and the voltage regulator diode U1 is adopted. The voltage stabilizing diode U1, a plurality of diodes D1, D2, … which are connected in series, DN and the controllable silicon are connected in series in sequence to form a loop.
The negative pole of the voltage stabilizing diode is connected with the positive pole of the diode D1, the DC + output end of the rectifier bridge is arranged between the negative pole of the voltage stabilizing diode U1 and the positive pole of the diode D1, the positive poles and the negative poles of the diodes are sequentially connected, the negative pole of the diode DN is connected with the anode A of the controlled silicon, the cathode K of the controlled silicon is connected with the DC-output end of the rectifier bridge, the control pole G of the controlled silicon is connected with the positive pole of the voltage stabilizing diode, and a resistor R1 is arranged between the control pole G of the controlled silicon and the cathode K. The AC input end of the rectifier bridge is connected with the discharge inductance coil.
As shown in fig. 3, in practical applications, the discharging circuit forms a loop with the inductor L1, the control switch K, and the voltage source or the current source. The voltage source or the current source is communicated with two ends of the inductance coil L1, the control switch K is arranged between the inductance coil and the voltage source or the current source, and the AC input end of the rectifier bridge is communicated with two ends of the inductance coil L1. And starting a voltage source or a current source to test the inductance coil L1, switching off the control switch K after the test of the inductance coil L1 is finished, and triggering the conduction of the silicon controlled rectifier when the reverse electromotive force generated by the inductance coil L1 reaches the rated voltage of the voltage stabilizing diode U1. The inductance coil L1, the diode and the controlled silicon form a series current loop, energy is released, the coil current linearly decreases along with time, and when the coil current is smaller than the controlled silicon maintaining current, the controlled silicon is closed, and discharging is completed.
The bidirectional discharge is realized by connecting a rectifier bridge between the inductance coil and the discharge loop, and the rectifier bridge can convert the input alternating current into direct current, so that the direct current and the alternating current can be discharged through the diode. The discharge power is mainly born by a plurality of diodes which are connected in series, the forward conduction voltage drop change of the diodes is small in a large current range, the forward voltage drops of the diodes with different specifications are usually between 0.7V and 1.1V, the diodes have quasi-constant voltage characteristics, and the discharge speed is higher as the discharge voltage is higher. The discharge voltage of the circuit is the sum of forward conduction voltage drops of all diodes, and the discharge voltage is increased by increasing the number of the diodes connected in series. The resistor R1 is also able to share part of the discharge power.
The voltage source or current source in practical application has the index of maximum output voltage (generally, open-circuit output voltage), and the voltage regulator diode is selected to ensure that the rated voltage is higher than the maximum output voltage of the voltage source or current source. The thyristor is ensured to be in a closed state without influencing the normal work of a voltage source or a current source.
Therefore, the high-power bidirectional rapid discharge circuit for the inductance coil, which adopts the structure, has higher power and stronger overcurrent capacity compared with a field effect tube, can meet the discharge requirement of higher power, and can be suitable for a bidirectional discharge circuit of a non-direct-current power supply.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (3)
1. A high-power bidirectional rapid discharge circuit for an inductance coil is characterized in that: the direct current power supply comprises a rectifier bridge, a voltage stabilizing device, a silicon controlled rectifier and a plurality of diodes D1, D2, … and DN which are connected in series, wherein the voltage stabilizing device and the diodes D1, D2, … and DN which are connected in series are sequentially connected in series to form a loop, an AC input end of the rectifier bridge is connected with two ends of a discharge inductance coil, a negative electrode of the voltage stabilizing device is connected with a positive electrode of the diode D1, a DC + output end of the rectifier bridge is arranged between the negative electrode of the voltage stabilizing device and the positive electrode of the diode D1, positive electrodes and negative electrodes of the diodes are sequentially connected, a negative electrode of the diode DN is connected with an anode A of the silicon controlled rectifier, a negative electrode K of the silicon controlled rectifier is connected with a DC-output end of the rectifier bridge, and a control electrode G of the silicon controlled rectifier is connected with the positive electrode of the voltage stabilizing device.
2. The high power bidirectional fast discharge circuit for an inductor according to claim 1, wherein: the voltage stabilizing device is a voltage stabilizing diode U1, a transient suppression diode or a piezoresistor.
3. The high-power bidirectional fast discharge circuit for the inductor according to claim 1, wherein a resistor R1 is disposed between the control electrode G and the cathode K of the thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211066148.6A CN115395799A (en) | 2022-09-01 | 2022-09-01 | High-power bidirectional rapid discharge circuit for inductance coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211066148.6A CN115395799A (en) | 2022-09-01 | 2022-09-01 | High-power bidirectional rapid discharge circuit for inductance coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115395799A true CN115395799A (en) | 2022-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211066148.6A Pending CN115395799A (en) | 2022-09-01 | 2022-09-01 | High-power bidirectional rapid discharge circuit for inductance coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115395799A (en) |
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2022
- 2022-09-01 CN CN202211066148.6A patent/CN115395799A/en active Pending
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