CN211790711U

CN211790711U - Single-phase inverter fault reporting circuit

Info

Publication number: CN211790711U
Application number: CN202020135095.9U
Authority: CN
Inventors: 李树枝; 马文龙; 武皓刚; 周兆安; 杨明涛
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-10-27
Anticipated expiration: 2030-01-21

Abstract

The utility model relates to a single-phase inverter power failure reporting circuit, including keeping apart boost unit, contravariant unit, DSP control system, keep apart boost unit, contravariant unit and establish ties, IGBT drive in the contravariant unit is connected with isolation power, DSP control system's power end is kept apart the power with DC110V DC24V respectively, DSP control system is connected with isolation boost unit, contravariant unit control signal respectively, DSP control system control failure reports the return circuit and switches on or break off, still includes one and is used for when DC110V DC24V isolation power loses electricity or voltage is drawn low, control failure reports the failure reporting device that the return circuit switched on. The utility model discloses a set up the trouble and report the device, on the basis that does not change current control logic, realized reporting the trouble when DC110V DC24V keeps apart that the power loses electricity or voltage is drawn down, it is little to have the change, easily realizes, advantage with low costs.

Description

Single-phase inverter fault reporting circuit

Technical Field

The utility model relates to a circuit, in particular to single-phase inverter power failure reports circuit.

Background

As shown in fig. 1, the single-phase inverter power supply of the motor train unit comprises an isolation boosting unit, an inverter unit, a filtering unit and a DSP control system, wherein the isolation power supply for driving the IGBT in the inverter unit and the DSP control system share one DC24V power supply. Because the isolation power supply for IGBT driving does not have the short-circuit protection function, when the IGBT is easy to cause faults, the 24V power supply is grounded, the DSP control system is powered off, and the faults of the single-phase inverter power supply of the motor train unit cannot be reported due to the fact that the DSP control system is powered off.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at solving the technical problem in the prior art and providing a single-phase inverter power failure reporting circuit which does not change the prior control logic, is easy to realize and has low cost.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a single-phase inverter power failure reporting circuit comprises an isolation boosting unit, an inversion unit and a DSP control system, wherein the isolation boosting unit and the inversion unit are connected in series, an IGBT driving isolation power supply and a DSP control system in the inversion unit are respectively connected with a DC110V/DC24V isolation power supply, the DSP control system is respectively connected with the isolation boosting unit and the inversion unit through control signals, and the DSP control system controls a failure reporting loop to be switched on or off and further comprises a failure reporting device used for controlling the failure reporting loop to be switched on when the DC110V/DC24V isolation power supply loses power or the voltage is pulled low.

Further, the fault reporting device comprises a fault reporting contactor and a second relay, a contact of the fault reporting contactor and a coil of the second relay are connected in series at the input end of the isolation boosting unit, the coil of the fault reporting contactor is arranged at the output end of the DC110V/DC24V isolation power supply, and a contact of the second relay is connected in series on the fault reporting loop.

Further, the contact of the fault reporting contactor is a normally closed contact.

Furthermore, a contact of a first relay is connected in series on the fault reporting loop, a coil of the first relay is connected with the DSP control system, and the contact of the first relay is connected with a contact of a second relay in parallel.

Further, the second relay is a time delay relay.

The DSP control system is connected with the filtering unit through control signals.

And the DSP control system is connected with the output contactor by control signals.

Further, the isolation boosting unit boosts voltage for DC110V/DC 380V.

Further, the inverter unit is a DC380V/AC220V inverter circuit.

In summary, the utility model provides a single-phase inverter power failure reports circuit, through setting up the trouble and telling the device, on the basis that does not change current control logic, realized telling the trouble when DC110V/DC24V keeps apart the power failure or the voltage is pulled down, increase redundant logic function, have the change little, easily realize, advantage with low costs.

Drawings

FIG. 1 is a topological schematic diagram of the single-phase inverter of the present invention;

fig. 2 is a schematic diagram of the fault reporting of the present invention.

As shown in fig. 1 and 2, a contact 1 of the first relay, a coil 2 of the first relay, a contact 3 of the failure reporting contactor, a coil 4 of the second relay, and a contact 5 of the second relay.

Detailed Description

The invention will be described in further detail with reference to the following detailed description and accompanying drawings:

in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 and 2, a fault reporting circuit for a single-phase inverter power supply mainly includes an isolation boosting unit, an inverting unit, a filtering unit, a DSP control system, an output contactor, and a fault reporting device.

The isolation boosting unit, the inversion unit, the filtering unit and the output contactor are sequentially connected in series, and the DSP control system is respectively connected with the isolation boosting unit, the inversion unit, the filtering unit and the output contactor through control signals. In the embodiment, the isolation boosting unit boosts voltage by DC110V/DC380V, and the inverter unit is an inverter circuit of DC380V/AC 220V. Under normal operating mode, keep apart the boost unit and rise DC110V power to DC380V, realize direct current and change into AC220V through the IGBT of contravariant unit, after the filtering unit promoted the power quality, DSP control system controlled output contactor got the electricity, supplied vehicle equipment through output contactor and used.

And an insulated power supply for driving the IGBT in the inverter unit and a power supply end of the DSP control system are respectively connected with the DC110V/DC24V insulated power supply. The DC110V/DC24V isolated power supply electrically converts DC110V to DC24V for use by IGBT drive and DSP control systems.

And the DSP control system controls the fault reporting loop to be switched on or switched off. The fault reporting loop comprises a first relay, a contact 1 of the first relay is connected in series on the fault reporting loop, and a coil 2 of the first relay is connected with the DSP control system. When the DSP control system detects fault information, the first relay is controlled to be powered on, the fault reporting loop is conducted, a level signal sent by the network port T564A is received by the T564, the network reports the fault of the single-phase inverter power supply, and meanwhile the output contactor is controlled to be powered off.

The fault reporting device is used for controlling the fault reporting loop to be conducted when the DC110V/DC24V isolation power supply loses power or the voltage is pulled low. When the DC110V/DC24V isolation power supply loses power, the DSP control system loses power and cannot control the conduction of the fault reporting loop, so the fault reporting device controls the conduction of the fault reporting loop. Specifically, the fault reporting device comprises a fault reporting contactor and a second relay, wherein a contact 3 of the fault reporting contactor and a coil 4 of the second relay are connected in series at the input end of the isolation boosting unit, a coil (not shown in the figure) of the fault reporting contactor is arranged at the output end of a DC110V/DC24V isolation power supply, and a contact 5 of the second relay is connected in series on a fault reporting loop. The contact 3 of the fault reporting contactor is a normally closed contact. The contact 1 of the first relay is connected in parallel with the contact 3 of the second relay.

When the system causes the power loss or the low pull of the DC110V/DC24V isolation power supply due to the problems of IGBT faults and the like, the fault arranged at the output end of the DC110V/DC24V isolation power supply reports that the coil of the contactor loses power, and the contact 3 of the contactor is closed. And a coil 4 of the second relay is electrified, a contact 5 of the second relay is closed, the fault reporting loop is conducted, and no output fault of the single-phase inverter power supply is reported.

Similar solutions can be derived from the solution given in the figures, as described above. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a single-phase inverter power failure reporting circuit, includes isolation boost unit, contravariant unit, DSP control system, isolation boost unit, contravariant unit are connected in series, IGBT drive in the contravariant unit is connected with DC110V/DC24V isolation power supply respectively with the power end of isolation power, DSP control system respectively with isolation boost unit, contravariant unit control signal connection, DSP control system control failure reports return circuit and switches on or breaks off, its characterized in that: the fault reporting device is used for controlling the conduction of the fault reporting loop when the DC110V/DC24V isolated power supply is powered off or the voltage is pulled down.

2. The single-phase inverter power failure reporting circuit of claim 1, wherein: the fault reporting device comprises a fault reporting contactor and a second relay, wherein a contact of the fault reporting contactor and a coil of the second relay are connected in series at the input end of the isolation boosting unit, the coil of the fault reporting contactor is arranged at the output end of the DC110V/DC24V isolation power supply, and a contact of the second relay is connected in series on the fault reporting loop.

3. The single-phase inverter power failure reporting circuit of claim 2, wherein: and the contact of the fault reporting contactor is a normally closed contact.

4. The single-phase inverter power failure reporting circuit of claim 2, wherein: and a contact of a first relay is connected in series on the fault reporting loop, a coil of the first relay is connected with the DSP control system, and the contact of the first relay is connected with a contact of a second relay in parallel.

5. The single-phase inverter power failure reporting circuit of claim 2, wherein: the second relay is a time delay relay.

6. The single-phase inverter power failure reporting circuit of claim 1, wherein: the device also comprises a filtering unit, wherein the filtering unit is connected with the isolation boosting unit and the inversion unit in series, and the DSP control system is connected with the filtering unit through control signals.

7. The single-phase inverter power failure reporting circuit of claim 6, wherein: the DSP control system is connected with the output contactor through control signals.

8. The single-phase inverter power failure reporting circuit of claim 1, wherein: the isolation boosting unit boosts voltage for DC110V/DC 380V.

9. The single-phase inverter power failure reporting circuit of claim 1, wherein: the inverter unit is a DC380V/AC220V inverter circuit.