CN113644837A - Multi-channel high-current pulse excitation circuit for deicing - Google Patents
Multi-channel high-current pulse excitation circuit for deicing Download PDFInfo
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- CN113644837A CN113644837A CN202110918751.1A CN202110918751A CN113644837A CN 113644837 A CN113644837 A CN 113644837A CN 202110918751 A CN202110918751 A CN 202110918751A CN 113644837 A CN113644837 A CN 113644837A
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- bus
- switch
- output circuit
- pulse output
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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
- H02M11/00—Power conversion systems not covered by the preceding groups
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
- H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device
Abstract
The invention is suitable for the technical field of aircraft deicing and provides a multichannel heavy current pulse excitation circuit for deicing, which comprises a bus power supply, a bus switch and an N-channel pulse output circuit; the bus switch is a full-control switch; the input end of the bus switch is connected with a bus capacitor C in parallel, and the output end of the bus switch is connected with a freewheeling diode D1 in parallel; the N-channel pulse output circuit comprises at least one pulse output circuit, and N is more than or equal to 1; the pulse output circuit is provided with a semi-controlled switch. The invention improves the prior multi-channel pulse excitation circuit, adds a full-control switch on a bus, and arranges a half-control switch on each pulse output circuit, because the half-control switch has better impact current resistance under the same size and weight compared with the full-control switch, the invention can realize the pulse excitation of large current; and a fly-wheel diode on the existing pulse output circuit is eliminated, so that the system weight of the excitation power supply can be effectively reduced, and the influence on the overall performance of the airplane is reduced.
Description
Technical Field
The invention relates to the technical field of aircraft deicing, in particular to a multichannel large-current pulse excitation circuit for deicing.
Background
Icing is one of the main causes of aircraft flight accidents, and icing on the leading edges of the wings and the empennage of the aircraft can cause serious flight accidents due to increased wing profile resistance, reduced lift force, reduced critical attack angle and deteriorated maneuverability and stability, so that the aircraft is widely concerned and researched by people. According to different energy forms adopted by anti-icing, the method can be divided into a mechanical deicing system, a liquid anti-icing system, a hot air anti-icing system and an electric heating anti-icing system, wherein the mechanical deicing method has the remarkable advantage of low energy consumption and is widely concerned by researchers.
In the mechanical vibration deicing method, two types of vibration excitation modes are available at present, one mode is high-frequency continuous vibration excitation, and a pressure type exciter is mostly adopted; the other is impact excitation, and adopts an electromagnetic coil type exciter. The electromagnetic coil type exciter is characterized in that an electromagnetic coil is arranged on the inner surface of a skin, and the electromagnetic coil generates high peak value electromagnetic waves to enable the skin to be blown to break ice, so that the deicing effect is achieved.
Because the area of the airplane needing to prevent and remove ice is large, and the selection control of the ice removing area needs to be realized, a multi-channel current pulse excitation circuit is generally selected, the traditional exciter circuit is shown in figure 1, each channel of pulse excitation circuit consists of a fully-controlled switch, a resistor and a freewheeling diode, each channel is independently controlled by the fully-controlled switch, and each branch is provided with a freewheeling diode element. The circuit form can realize independent and effective control of each pulse output circuit, and has a better anti-icing and deicing effect.
However, with the intensive research on the performance of airplanes, it is necessary for an anti-icing device to satisfy the anti-icing effect and to minimize the influence on the overall performance of the airplane.
Disclosure of Invention
The invention aims to provide a multichannel large-current pulse excitation circuit for deicing, and provides a light-weight and small excitation circuit, so that the overall system performance of an airplane is ensured.
The applicant has found that the N-channel pulse excitation circuit shown in the prior art (as shown in fig. 1) controls each pulse output circuit by a fully-controlled switch, and a freewheeling diode is arranged on each branch, so that although the ice can be effectively removed, the whole volume and weight of the circuit are relatively large, thereby increasing the weight of the aircraft fuselage and being relatively high in cost.
In order to reduce the influence of a deicing device on the performance of the whole system of an airplane, the invention provides a multi-channel high-current pulse excitation circuit for deicing, which is characterized by comprising a bus power supply, a bus switch and an N-channel pulse output circuit;
the bus switch is a full-control switch;
the input end of the bus switch is connected with a bus capacitor C in parallel, and the output end of the bus switch is connected with a freewheeling diode D1 in parallel;
the N-channel pulse output circuit comprises at least one pulse output circuit, namely N is more than or equal to 1;
and a semi-controlled switch is arranged on the pulse output circuit.
Furthermore, an energy storage capacitor Cn is arranged in parallel on the semi-controlled switch on the pulse output circuit, wherein N is the energy storage capacitor of the nth channel, and N is less than or equal to N.
Furthermore, a resistor Rn is also connected in series with the semi-controlled switch, wherein N is an energy storage capacitor of the nth channel, and N is less than or equal to N.
Further, a bus inductor L1 is also provided on the output bus.
Compared with the prior art, the multi-channel high-current pulse excitation circuit for deicing at least has the following beneficial effects:
1. compared with a fully-controlled switch used in the prior art, a semi-controlled switch on the pulse output circuit has better impact current resistance under the same size and weight, and can ensure the pulse output of large current;
2. according to the circuit design, a free-wheeling diode is not required to be independently arranged on each pulse output circuit, when the number of output channels is large, the circuit can achieve light weight and small size, the system weight of the excitation circuit can be effectively reduced, and therefore the influence on the overall performance of an airplane is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a prior art multi-channel high current pulse excitation circuit diagram;
fig. 2 is a multi-channel high-current pulse excitation circuit for deicing according to an embodiment of the invention.
Detailed Description
The following description provides many different embodiments, or examples, for implementing different features of the invention. The particular examples set forth below are illustrative only and are not intended to be limiting.
A multi-channel large-current pulse excitation circuit for deicing is shown in figure 2 and comprises a bus power supply DC, a bus switch and an N-channel pulse output circuit;
the bus switch is a full-control switch; such as IGBTs, MOSFETs, etc., which belong to electrical components well known to those skilled in the art and are not described herein;
the input end of the bus switch is connected with a bus capacitor C in parallel, and the output end of the bus switch is connected with a freewheeling diode D1 in parallel.
Specifically, as shown in fig. 2, in the present embodiment, the bus switch Q1 is an IGBT switch, a collector of the IGBT is connected to the positive output terminal of the bus power supply DC, and an emitter of the IGBT is connected to the bus output circuit; and the bus capacitor C is connected with a bus switch IGBT in parallel and is connected with two ends of a bus power supply DC.
The N-channel pulse output circuit comprises at least one pulse output circuit, namely N is more than or equal to 1; as shown in fig. 2, the pulse-width modulation circuit comprises a 1 st pulse output circuit, a 2 nd pulse output circuit and a 3 rd pulse output circuit; each pulse output circuit is provided with a half-controlled switch Tn, such as an SCR, to control the conduction of each channel.
Preferably, an energy storage capacitor Cn is connected in parallel at two ends of each half-controlled switch Tn, where n is an energy storage capacitor of the nth channel, and the energy storage capacitor Cn can avoid that when the bus switch Q1 is turned on, the voltage rising speed of each half-controlled switch Tn is too fast, and a phenomenon of false turn-on occurs. Meanwhile, each pulse output circuit is also connected with a resistor Rn in series, wherein n is an energy storage capacitor of the nth channel.
The output bus is also provided with an inductor L1, and of course, when the load is an inductive load, the inductance value of L1 can be reduced, or L1 can be directly eliminated.
The working principle of the multichannel large-current pulse excitation circuit for deicing in the embodiment is as follows: the full-control bus switch Q1 is opened, the output bus is electrified, the half-control switch on the N-channel pulse output circuit is controlled, the half-control switch of the pulse output circuit to be conducted is conducted, pulse voltage is output on the conducted channel, and pulse excitation is generated at the moment; after the bus is conducted for a certain time, the full-control bus switch on the bus is turned off, after the bus is turned off, the current on each pulse output circuit is reduced to zero, then the half-control bus switch Tn is turned off, a cycle is completed, and the next pulse output cycle is entered.
Specifically, the control flow is as follows:
s10, charging and storing energy for a bus capacitor C by a direct-current voltage source DC;
s20, when the voltage of the bus capacitor C is detected to reach an output range, the bus switch Q1 is conducted;
s30, according to the control command, conducting a half-controlled switch Tn on each pulse output circuit (the half-controlled switch which is not required to be conducted is not conducted, and only the switch which is required to be conducted is conducted);
s40, after a certain time, turning off a bus switch Q1; meanwhile, the current on each pulse output circuit is reduced to zero, and then the semi-controlled switch Tn is turned off;
s50, confirming that the current on each pulse output circuit is reduced to zero, and ending the period;
s60, repeating the steps S10-S50, and starting the next period until the deicing is finished;
and S70, turning off the direct current power supply DC.
According to the multichannel large-current pulse excitation circuit for deicing, the bus is provided with the fully-controlled switch, each pulse output circuit is provided with the semi-controlled switch, and the semi-controlled switches such as SCR have better impact current resistance under the same size and weight compared with the fully-controlled switches such as IGBT or MOS (metal oxide semiconductor) tubes, so that large-current pulse excitation can be realized; meanwhile, as a freewheeling diode is not required to be independently arranged for each pulse output circuit, when a large-area pulse excitation circuit is required on the surface of the airplane for pulse excitation deicing, the weight of the whole circuit can be obviously reduced, namely the system weight of the excitation power supply can be effectively reduced, so that the influence on the overall performance of the airplane is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A multi-channel large-current pulse excitation circuit for deicing is characterized by comprising a bus power supply, a bus switch and an N-channel pulse output circuit;
the bus switch is a full-control switch;
the input end of the bus switch is connected with a bus capacitor C in parallel, and the output end of the bus switch is connected with a freewheeling diode D1 in parallel;
the N-channel pulse output circuit comprises at least one pulse output circuit, namely N is more than or equal to 1;
and a semi-controlled switch is arranged on the pulse output circuit.
2. The multi-channel high-current pulse excitation circuit for deicing as claimed in claim 1, wherein an energy storage capacitor C is arranged in parallel on the semi-controlled switch on the pulse output circuitnWherein N is the energy storage capacitor of the nth channel, and N is less than or equal to N.
3. A method according to claim 2, for removingThe multi-channel large-current pulse excitation circuit for the ice is characterized in that a resistor R is further connected in series on the semi-controlled switchnWherein N is the energy storage capacitor of the nth channel, and N is less than or equal to N.
4. A multi-channel high current pulse excitation circuit for deicing according to any one of claims 1-3, wherein a bus inductor L1 is further provided on said output bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110918751.1A CN113644837A (en) | 2021-08-11 | 2021-08-11 | Multi-channel high-current pulse excitation circuit for deicing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110918751.1A CN113644837A (en) | 2021-08-11 | 2021-08-11 | Multi-channel high-current pulse excitation circuit for deicing |
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| CN113644837A true CN113644837A (en) | 2021-11-12 |
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| CN202110918751.1A Pending CN113644837A (en) | 2021-08-11 | 2021-08-11 | Multi-channel high-current pulse excitation circuit for deicing |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1592874A (en) * | 2002-02-01 | 2005-03-09 | 电子影剧院控制公司 | Extraction of accessory power from a signal supplied to a luminaire from a phase angle dimmer |
| CN105119517A (en) * | 2015-09-11 | 2015-12-02 | 中国科学院电工研究所 | High-voltage pulse power supply for synchronous discharge of multiple spark plasma synthetic jet actuators |
| CN107456656A (en) * | 2017-06-09 | 2017-12-12 | 西安交通大学 | A kind of multichannel trans-skull magnetic stimulating device based on straight wire array |
-
2021
- 2021-08-11 CN CN202110918751.1A patent/CN113644837A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1592874A (en) * | 2002-02-01 | 2005-03-09 | 电子影剧院控制公司 | Extraction of accessory power from a signal supplied to a luminaire from a phase angle dimmer |
| CN105119517A (en) * | 2015-09-11 | 2015-12-02 | 中国科学院电工研究所 | High-voltage pulse power supply for synchronous discharge of multiple spark plasma synthetic jet actuators |
| CN107456656A (en) * | 2017-06-09 | 2017-12-12 | 西安交通大学 | A kind of multichannel trans-skull magnetic stimulating device based on straight wire array |
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