CN218301241U - 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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- CN218301241U CN218301241U CN202222330328.2U CN202222330328U CN218301241U CN 218301241 U CN218301241 U CN 218301241U CN 202222330328 U CN202222330328 U CN 202222330328U CN 218301241 U CN218301241 U CN 218301241U
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- rectifier
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Abstract
The utility model discloses a high-power two-way quick discharge circuit for inductance coils, including the rectifier bridge, the steady voltage device, the diode D1 of silicon controlled rectifier and a plurality of series connection, D2, \8230, DN, the steady voltage device, the diode D1 of a plurality of series connections, D2, \8230, DN and silicon controlled rectifier establish ties in proper order and form the return circuit, the AC input termination of rectifier bridge discharges the both ends of inductance coils, the negative pole of steady voltage device is connected with diode D1's positive pole, the DC + output of rectifier bridge sets up between the negative pole of steady voltage device and diode D1's positive pole, the positive negative pole of a plurality of diodes is connected in proper order, diode DN's negative pole is connected with the positive pole A of silicon controlled rectifier, the negative pole K of silicon controlled rectifier is connected with the DC-output end of rectifier bridge, the control utmost point G of silicon controlled rectifier is connected with the positive pole of steady voltage device. The utility model adopts the above structure a high-power two-way quick discharge circuit for inductance coil, it is fast to discharge, and has the two-way discharge function.
Description
Technical Field
The utility model belongs to the technical field of the analog circuit and specifically relates to a high-power two-way quick discharge circuit for inductance coils is related to.
Background
When measuring the direct current resistance of the inductance coil, a direct current of the inductance coil needs to be given, and after the measurement is finished, the current of the inductance coil needs to be released. As shown in fig. 1, the conventional discharge device is formed by connecting a diode (D) with a resistor (R), and the diode (D) has a unidirectional conductivity, so that the discharge device does not affect normal measurement.
Patent of publication No. CN201965164U provides an inductance coil discharge circuit, which uses 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 zener diode, and since 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.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a two-way quick discharge circuit of high-power for inductance coil, it is fast to discharge, and has the two-way discharge function.
In order to achieve the above object, the utility model provides a high-power two-way quick discharge circuit for inductance coils, diode D1, D2, \ 8230, DN including rectifier bridge, zener device, silicon controlled rectifier and a plurality of series connection, zener device, a plurality of series connection diode D1, D2, \ 8230, DN and silicon controlled rectifier establish ties in proper order and form the return circuit, the AC input termination of rectifier bridge discharges inductance coils's both ends, zener device's negative pole with diode D1's positive pole is connected, rectifier bridge's DC + output set up in zener device's negative pole with between diode D1's the positive pole, a plurality of diode's positive and negative pole are connected in proper order, diode DN's negative pole with the positive pole A of silicon controlled rectifier is connected, silicon controlled rectifier's negative pole K with rectifier bridge's DC-output end is connected, silicon controlled rectifier's control pole G with zener device's positive pole is connected.
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 utility model adopts the above structure a two-way quick discharge circuit of high-power for inductance coil, contrast field effect transistor power is bigger and have stronger overcurrent ability, can satisfy more powerful discharge demand, and can be adapted to non DC power supply's two-way discharge circuit.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
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 inductance coil according to the present invention;
fig. 3 is a schematic diagram of a practical circuit principle of the embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further explained by the accompanying drawings and examples.
Examples
As shown in fig. 2, a high power bidirectional fast discharge circuit for an inductance coil comprises a rectifier bridge, a voltage regulator device, a thyristor and a plurality of diodes D1, D2, \8230, DN connected in series, wherein the voltage regulator device is a voltage regulator diode U1, a transient suppression diode or a piezoresistor, and the voltage regulator diode U1 is adopted. The voltage stabilizing diode U1, a plurality of diodes D1, D2 and 8230are 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. The starting voltage source or the current source tests the inductance coil L1, after the test of the inductance coil L1 is completed, the control switch K is switched off, and when the reverse electromotive force generated by the inductance coil L1 reaches the rated voltage of the voltage stabilizing diode U1, the silicon controlled rectifier can be triggered to be conducted. 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 of the diodes in a larger current range is less in change, the forward voltage drops of the diodes with different specifications are usually between 0.7V and 1.1V, and the diodes have the quasi-constant voltage characteristic. The higher the discharge voltage, the faster the discharge speed. 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 utility model adopts the above structure a high-power two-way quick discharge circuit for inductance coil, contrast field effect transistor power is bigger and have stronger overcurrent ability, can satisfy more powerful discharge demand, and can be adapted to non-DC power supply's two-way discharge circuit.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit 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: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.
Claims (3)
1. A high-power bidirectional rapid discharge circuit for an inductance coil is characterized in that: the rectifier comprises a rectifier bridge, a voltage stabilizing device, a silicon controlled rectifier and a plurality of diodes D1, D2, \8230andDN which are connected in series, wherein the voltage stabilizing device and the diodes D1, D2, \8230, DN and the silicon controlled rectifier are connected in series in sequence to form a loop, the AC input end of the rectifier bridge is connected with two ends of a discharge inductance coil, the negative electrode of the voltage stabilizing device is connected with the positive electrode of the diode D1, the 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, the positive electrodes and the negative electrodes of the diodes are connected in sequence, the negative electrode of the diode DN is connected with the positive electrode A of the silicon controlled rectifier, the negative electrode 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 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 an inductor according to claim 1, wherein: and a resistor R1 is arranged between the control electrode G and the cathode K of the controllable silicon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222330328.2U CN218301241U (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 |
|---|---|---|---|
| CN202222330328.2U CN218301241U (en) | 2022-09-01 | 2022-09-01 | High-power bidirectional rapid discharge circuit for inductance coil |
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| Publication Number | Publication Date |
|---|---|
| CN218301241U true CN218301241U (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222330328.2U Active CN218301241U (en) | 2022-09-01 | 2022-09-01 | High-power bidirectional rapid discharge circuit for inductance coil |
Country Status (1)
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| CN (1) | CN218301241U (en) |
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2022
- 2022-09-01 CN CN202222330328.2U patent/CN218301241U/en active Active
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