CN219224875U - Ground ac power supply detecting box - Google Patents
Ground ac power supply detecting box Download PDFInfo
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- CN219224875U CN219224875U CN202223392260.7U CN202223392260U CN219224875U CN 219224875 U CN219224875 U CN 219224875U CN 202223392260 U CN202223392260 U CN 202223392260U CN 219224875 U CN219224875 U CN 219224875U
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Abstract
The utility model provides a ground alternating current power supply detection box which consists of a chassis, an intermediate frequency variable frequency power supply module, an operation panel and a connecting cable; the intermediate frequency variable frequency power supply module consists of a rectifying circuit, an inverter circuit, a protection circuit, a control circuit, an AC output circuit and an auxiliary circuit; the operation panel is positioned on the front surface of the case and is provided with a three-phase voltage-current display meter, a frequency display meter, a phase sequence conversion knob, a voltage regulation knob, a frequency regulation knob and a power switch; the back of the case is provided with a heat dissipation hole, a cable interface and a power interface. The utility model has simple and reasonable design, not only achieves the validity verification of the three-phase voltage and the phase sequence correctness of the aircraft, but also improves the safety guarantee of maintenance personnel, can rapidly and conveniently detect the on-board alternating current power supply system under the condition of outfield, and ensures the maintenance quality of the aircraft.
Description
Technical Field
The utility model relates to the technical field of aviation detection, in particular to a ground alternating current power supply detection box which is used for detecting the size and phase sequence correctness of three-phase voltage of a power supply on an aircraft outfield.
Background
The on-board alternating current power generation system is key core equipment of an airplane, and is an important link of ground service inspection work when ground service maintenance is carried out, and the correctness of functions such as three-phase voltage and phase sequence of the on-board alternating current power generation system is checked. At present, when the ground service inspection is carried out, the aircraft is moved to the hangar, the detection is realized by utilizing the power supply and the signal acquisition equipment in the hangar, and the problems of long detection period, need of moving the aircraft and the like exist. When a fighter is maintained at a field airport, the current detection means cannot meet the requirements, and a portable ground alternating current power supply detection device is needed for conveniently and rapidly detecting the three-phase voltage and the phase sequence of an on-board power supply when the fighter is maintained at the field.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a ground alternating current power supply detection box which can quickly and conveniently detect an on-board alternating current power supply system under an external field condition.
The technical scheme of the utility model is as follows:
the ground alternating current power supply detection box consists of a case, an intermediate frequency variable frequency power supply module, an operation panel and a connecting cable;
the intermediate frequency conversion power supply module consists of a rectifying circuit, an inverter circuit, a protection circuit, a control circuit, an AC output circuit and an auxiliary circuit;
the operation panel is positioned on the front surface of the case and is provided with a three-phase voltage-current display meter, a frequency display meter, a phase sequence conversion knob, a voltage regulation knob, a frequency regulation knob and a power switch;
the back of the case is provided with a heat dissipation hole, a cable interface and a power interface;
the rectification circuit in the intermediate frequency conversion power supply module consists of an EMI filter and a rectification filter unit, so that the rectification of the input 220V-50Hz alternating current is realized; the inverter circuit consists of a DC/AC conversion circuit and an output filter circuit, and is used for carrying out AC-DC-AC conversion and SPWMD full-bridge inversion on an alternating current signal passing through the rectification circuit, and then filtering is carried out to obtain a standard and high-reliability pure sine wave three-phase alternating current power supply signal; the protection circuit comprises an overcurrent, overtemperature, FUSE fusing, power-off and overvoltage detection circuit, and realizes the comprehensive protection function of output short circuit, overcurrent, overvoltage and overload and internal overheat, and the signal of the protection circuit is output to the SPWM output control circuit; the control circuit consists of a PWM circuit, an SPWM output control and driving circuit, generates a control signal according to the required voltage and frequency, and outputs the control signal to the DC/AC conversion circuit; the AC output circuit is realized by an output unit and outputs pure sine wave three-phase alternating current power supply signals.
Further, the voltage regulation range of the ground alternating current power supply detection box is as follows: 0V-150V; voltage accuracy: 0.1V; frequency adjustment range: 300 Hz-500 Hz; frequency accuracy: 0.1Hz.
Further, the ground alternating current power supply detection box is externally connected with a rated voltage of a power supply: 220 V+ -2.2V, frequency 50Hz/60 Hz+ -10%; maximum current: 6A.
Furthermore, when the ground alternating current power supply detection box is used for checking the power generation condition of the on-board alternating current power supply system, the detection box is connected to the on-board DJB-1B ground socket through a connecting cable, an on-board alternating current power supply output parameter signal is transmitted to the detection box through the connecting cable, and finally the power quality of the on-board alternating current power supply is displayed on a three-phase voltage current display meter and a frequency display meter on an operation panel through load simulation.
Furthermore, when the ground alternating current power supply detection box is used for checking the condition that an on-board alternating current power supply system does not work, the 220V-50Hz alternating current power supply of the detection box is connected, the input 220V-50Hz alternating current is subjected to AC-DC-AC conversion and SPWMD full-bridge inversion through the intermediate frequency variable frequency power supply module, and then the standard and high-reliability pure sine wave three-phase alternating current power supply is realized through filtering; the corresponding control signals are generated through the regulation control of the voltage regulation and frequency modulation knob, so that the output signals reach the standard alternating current power supply required by the machine; finally, the test result is output to the airplane through the equipment, so that the correctness of the on-board alternating current power supply system is checked.
Advantageous effects
The utility model has simple and reasonable design, not only achieves the validity verification of the three-phase voltage and the phase sequence correctness of the aircraft, but also improves the safety guarantee of maintenance personnel, can rapidly and conveniently detect the on-board alternating current power supply system under the condition of outfield, and ensures the maintenance quality of the aircraft.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1: checking a working principle diagram of a three-phase power supply self-protection system on a ground alternating current power supply detection box machine;
fig. 2: the principle diagram of the medium-frequency variable-frequency power supply module of the ground alternating-current power supply detection box;
fig. 3: a front schematic diagram of a ground alternating current power supply detection box;
fig. 4: is a schematic diagram of the back of the ground alternating current power supply detection box.
Detailed Description
The following detailed description of embodiments of the utility model is exemplary and intended to be illustrative of the utility model and not to be construed as limiting the utility model.
For a certain aircraft, three-phase voltage detection requirements of an onboard alternating current power supply system are as follows:
1) Voltage requirement: 110v±2.5v (A, B, C phase);
2) Overpressure requirement: 126V-128V;
3) Undervoltage requirement: 88.5V-100V;
4) Frequency requirement: 380Hz + -5 Hz;
5) The over-frequency requirement is as follows: 430Hz + -5 Hz;
6) Under-frequency requirement: 370Hz + -5 Hz;
7) Overfrequency requirement: 465 Hz.+ -.5 Hz.
In order to quickly and conveniently detect three-phase voltage parameters of an on-board alternating current power supply system under an outfield condition, the embodiment provides a ground alternating current power supply detection box.
As shown in FIG. 1, the ground AC power supply detection box consists of a case, an intermediate frequency conversion power supply module, an operation panel and a connecting cable.
The intermediate frequency conversion power supply module consists of a rectifying circuit, an inverter circuit, a protection circuit, a control circuit, an AC output circuit and an auxiliary circuit.
As shown in fig. 2, the rectification circuit in the intermediate frequency conversion power supply module consists of an EMI filter and a rectification filter unit, so as to rectify the input 220V-50Hz alternating current. The inverter circuit consists of a DC/AC conversion circuit and an output filter circuit, and the AC signal passing through the rectification circuit is subjected to AC-DC-AC conversion and SPWMD full-bridge inversion, and then is subjected to filtering to obtain a standard and high-reliability pure sine wave three-phase 115V-400Hz AC power supply signal (of course, the output voltage and the frequency can be adjusted). The protection circuit comprises an overcurrent, over-temperature, FUSE fusing, power-off and overvoltage detection circuit, and achieves comprehensive protection functions of output short circuit, overcurrent, overvoltage, overload, internal overheat and the like, and a signal of the protection circuit is output to the SPWM output control circuit. The control circuit consists of a PWM circuit, an SPWM output control and driving circuit, generates control signals according to required voltage and frequency, and outputs the control signals to the DC/AC conversion circuit. The AC output circuit is realized by an output unit and outputs pure sine wave three-phase alternating current power supply signals; the rest is an auxiliary circuit.
The intermediate frequency variable frequency power supply module takes a microprocessor as a core in an MPWM mode, is provided with an active component IGBT module, and uses digital frequency division, D/A conversion, instantaneous value feedback and sine pulse, width modulation and other technical means for separating transformer output, so that the stability of the whole equipment is improved. The intermediate frequency power supply inputs a single alternating voltage and frequency (220V-50 Hz) and internally transfers the alternating current to the direct current to perform direct current to alternating current conversion and rectification, generating a very stable pure sine wave (schematic block diagram is shown in fig. 2).
As shown in fig. 3, the operation panel is provided with a three-phase voltage-current display meter, a frequency display meter, a phase sequence conversion knob, a voltage adjustment knob, a frequency adjustment knob and a power switch. Wherein the voltage regulation range: 0V-150V; voltage accuracy: 0.1V; frequency adjustment range: 300 Hz-500 Hz; frequency accuracy: 0.1Hz.
As shown in fig. 4, the back of the case is provided with a heat dissipation hole, a cable interface and a power interface; rated voltage of external power supply: 220 V+ -2.2V, frequency 50Hz/60 Hz+ -10%; maximum current: 6A.
According to the maintenance requirements of the external field machine, the following two checks are needed:
1. checking under the condition of power generation of an onboard alternating current power supply system: under the condition of normal power generation of an on-board generator, detecting the voltage of a power grid and the frequency of the power grid at different rotating speeds;
2. checking under the condition that the onboard alternating current power supply system does not work: under the condition that the on-board generator does not work, the control protection function of the control protector of the on-board alternating current power supply system is detected, and the control protection function comprises overvoltage, undervoltage, underfrequency, over-frequency and over-frequency protection functions.
When the on-board AC power supply system is checked under the condition of power generation, the detection box is connected to the on-board DJB-1B ground socket through the connecting cable, the on-board AC power supply output parameters (voltage, current and frequency) are transmitted to the detection box through the connecting cable, and the power quality of the on-board AC power supply is finally displayed on the display module (three-phase voltage current display meter and frequency display meter) on the operation panel through load simulation.
When the on-board alternating current power supply system is checked under the condition of no work, the 220V-50Hz alternating current power supply of the detection box is connected, and the input 220V-50Hz alternating current is subjected to AC-DC-AC conversion and SPWMD full-bridge inversion by using a processing mode of taking a microprocessor as a core in an MPWM mode through an intermediate frequency variable frequency power supply module, and then the standard and high-reliability pure sine wave three-phase 115V 400Hz alternating current power supply is realized through filtering; the voltage and frequency adjusting knob is used for adjusting and controlling to generate corresponding control signals, so that the output signals reach the standard alternating current power supply (mainly divided into overvoltage, voltage loss, over-frequency, low frequency and standard) required by the aircraft, and finally the output signals are output to the aircraft through equipment, thereby checking the correctness of the alternating current power supply system on the aircraft.
Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.
Claims (3)
1. The utility model provides a ground alternating current power supply detection box which characterized in that: the device consists of a case, an intermediate frequency variable frequency power supply module, an operation panel and a connecting cable;
the intermediate frequency conversion power supply module consists of a rectifying circuit, an inverter circuit, a protection circuit, a control circuit, an AC output circuit and an auxiliary circuit;
the operation panel is positioned on the front surface of the case and is provided with a three-phase voltage-current display meter, a frequency display meter, a phase sequence conversion knob, a voltage regulation knob, a frequency regulation knob and a power switch;
the back of the case is provided with a heat dissipation hole, a cable interface and a power interface;
the rectification circuit in the intermediate frequency conversion power supply module consists of an EMI filter and a rectification filter unit, so that the rectification of the input 220V-50Hz alternating current is realized; the inverter circuit consists of a DC/AC conversion circuit and an output filter circuit, and is used for carrying out AC-DC-AC conversion and SPWMD full-bridge inversion on an alternating current signal passing through the rectification circuit, and then filtering is carried out to obtain a standard and high-reliability pure sine wave three-phase alternating current power supply signal; the protection circuit comprises an overcurrent, overtemperature, FUSE fusing, power-off and overvoltage detection circuit, and realizes the comprehensive protection function of output short circuit, overcurrent, overvoltage and overload and internal overheat, and the signal of the protection circuit is output to the SPWM output control circuit; the control circuit consists of a PWM circuit, an SPWM output control and driving circuit, generates a control signal according to the required voltage and frequency, and outputs the control signal to the DC/AC conversion circuit; the AC output circuit is realized by an output unit and outputs pure sine wave three-phase alternating current power supply signals.
2. The ground ac power supply detection box according to claim 1, wherein: voltage regulation range: 0V-150V; voltage accuracy: 0.1V; frequency adjustment range: 300 Hz-500 Hz; frequency accuracy: 0.1Hz.
3. The ground ac power supply detection box according to claim 1, wherein: rated voltage of external power supply: 220 V+ -2.2V, frequency 50Hz/60 Hz+ -10%; maximum current: 6A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223392260.7U CN219224875U (en) | 2022-12-18 | 2022-12-18 | Ground ac power supply detecting box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223392260.7U CN219224875U (en) | 2022-12-18 | 2022-12-18 | Ground ac power supply detecting box |
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| Publication Number | Publication Date |
|---|---|
| CN219224875U true CN219224875U (en) | 2023-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223392260.7U Active CN219224875U (en) | 2022-12-18 | 2022-12-18 | Ground ac power supply detecting box |
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| CN (1) | CN219224875U (en) |
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- 2022-12-18 CN CN202223392260.7U patent/CN219224875U/en active Active
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