CN203491773U - Emergency power supply device with independent safety voltage - Google Patents

Abstract

The utility model relates to the technical field of electric control and particularly relates to an emergency power supply device with independent safety voltage. The emergency power supply device comprises an LKC charger module, a DN electrical energy storage unit, an NB power inversion module, a DY switching power supply module, a QH switching module and a DSP controller. When commercial power is normal, a QFB circuit bracket is turned on, DC 24V safety voltage is output by a rectifying circuit and a chopper circuit of the DY switching power supply module, and the power supply actually used by a load is the commercial power from a power network. When the commercial power is abnormal, the DN electrical energy storage unit outputs DC 220 V to directly supply power to the DY switching power supply module, and the DC 24V safety voltage is output by the DC220 V/DC 24 V chopper circuit of the DY switching power supply module. At this time, the power supply used by the load comes from the DN electrical energy storage unit. Since alternating current does not need to be output by the power inversion module to supply power to the switching power supply module, the load of the power inversion module can be reduced so as to ensure the normal output of the DC 24V safety voltage.

Description

A kind of emergency power supply unit with independent safe voltage

Technical field

The utility model relates to Electrical Control Technology field, specifically relates to a kind of emergency power supply unit with independent safe voltage.

Background technology

Emergency power supply is used for emergency lighting and evacuation indication system, and generally, output AC 220V voltage is emergence lighting lamp and the power supply of exit signs light fixture.Country progressively improves the requirement of Electrical Safety now, and the rated value of China's standard regulation power-frequency voltage effective value has 42V, 36V, 24V, 12V and 6V.The hand-held illuminating lamp of using in having shock hazard environment and local lighting lamp should adopt 36V or 24V safe voltage.Emergency power supply also starts to adopt DC24V safe voltage supply power mode.

Existing emergency power supply DC24V supply power mode is single ac power supply method, and as shown in Figure 1, concrete scheme is as follows:

1), when civil power is normal, closed QFA, civil power, through KM1, is directly exported 220V alternating current; At output terminals A C220V, through Switching Power Supply AC/DC conversion, export DC24V safe voltage; If closed in the case QFC and QFD, civil power charges to DN power storaging unit through LKC charger module.

2), when city's electrical anomaly, DN power storaging unit through NB power inverting module again through KM2 output 220V alternating current; At output terminals A C220V, through Switching Power Supply AC/DC conversion, export DC24V safe voltage.

This supply power mode can increase the burden of power inverting module, reduces the real output of power inverting module; When DC24V safe voltage power output is too high, can cause power inverting module overload, affect the normal use of emergency power supply.

Utility model content

For the technical problem existing in prior art, the utility model provides a kind of emergency power supply unit with independent safe voltage, and this emergency power supply unit adopts two kinds of supply power modes of alternating current-direct current, and assurance DC24V safe voltage is normally exported.

To achieve these goals, the technical scheme adopting is: a kind of emergency power supply unit with independent safe voltage, include LKC charger module, DN power storaging unit, NB power inverting module, DY switch power module, QH handover module and dsp controller, wherein

Civil power is connected with the input of the KM1 A.C. contactor of QH handover module by QFA circuit breaker;

The input of LKC charger module is connected on the circuit between QFA circuit breaker and the input of KM1 A.C. contactor by QFC circuit breaker, and the output of LKC charger module is connected with the input of DN power storaging unit by QFD circuit breaker;

The output of DN power storaging unit is connected with the input of NB power inverting module, the output of NB power inverting module connects by the input of the KM2 A.C. contactor of QH handover module, and the output of KM1 A.C. contactor, KM2 A.C. contactor is all connected with the emergent output bus of AC220V;

The input of DY switch power module respectively be connected the QFB circuit breaker of civil power, the output of DN power storaging unit connects, the output of DY switch power module is connected with DC24V safe voltage output bus;

Dsp controller is connected with LKC charger module, NB power inverting module, DY switch power module, QH handover module respectively.

Emergency power supply unit with independent safe voltage of the present utility model, compared with prior art, its beneficial effect shows:

1), civil power is when normal, closed QFB circuit breaker, through the AC220V/DC220V of DY switch power module rectification circuit and DC220V/DC24V chopper circuit, output DC24V safe voltage, the power supply of the actual use of now load is the civil power from electrical network.During city electrical anomaly, the output of DN power storaging unit DC220V directly give the power supply of DY switch power module, through the DC220V/DC24V of DY switch power module chopper circuit, and output DC24V safe voltage.Now, the power supply that user load is used comes from DN power storaging unit.Due to without powering to switch power module through power inverting module output AC, can alleviate the burden of power inverting module, thereby guarantee the normal output of DC24V safe voltage.

2) when, civil power is normal, civil power is directly powered to the emergent output bus of AC220V through QFA circuit breaker and KM1 A.C. contactor, whole emergency power supply unit carries out city's electro-detection and DN power storaging unit Charge Management, NB power inverting module is work not, the power supply of the now actual use of user load is the civil power from electrical network, therefore, NB power inverting module always in resting state, can effectively reach energy-conservation effect when civil power is normal.Civil power is powered to LKC charger module by QFC circuit breaker, LKC charger module is charged to DN power storaging unit by QFD circuit breaker, LKC charger module is just carried out Charge Management to DN power storaging unit, does not have the ability that DC power supply is directly provided to DN power storaging unit.

Accompanying drawing explanation

Fig. 1 is the electrical schematic diagram of emergency power supply of the prior art.

Fig. 2 is the electrical schematic diagram of the emergency power supply unit with independent safe voltage of the present utility model.

Fig. 3 is the electrical schematic diagram of DC24V safe voltage output bus method of supplying power to.

Embodiment

For the ease of it will be appreciated by those skilled in the art that below in conjunction with accompanying drawing, the utility model is further described.As a kind of preferred embodiment of the present utility model, refer to Fig. 2 and 3, emergency power supply unit with independent safe voltage, include LKC charger module, DN power storaging unit (for example storage battery), NB power inverting module, DY switch power module, QH handover module and dsp controller, wherein:

Civil power is connected with the input of the KM1 A.C. contactor of QH handover module by QFA circuit breaker.

The input of LKC charger module is connected on the circuit between QFA circuit breaker and the input of KM1 A.C. contactor by QFC circuit breaker, and the output of LKC charger module is connected with the input of DN power storaging unit by QFD circuit breaker.

The output of DN power storaging unit is connected with the input of NB power inverting module, the output of NB power inverting module connects by the input of the KM2 A.C. contactor of QH handover module, and the output of KM1 A.C. contactor, KM2 A.C. contactor is all connected with the emergent output bus of AC220V.

The input of DY switch power module respectively be connected the QFB circuit breaker of civil power, the output of DN power storaging unit connects, the output of DY switch power module is connected with DC24V safe voltage output bus.

Dsp controller is connected with LKC charger module, NB power inverting module, DY switch power module, QH handover module respectively.

Emergency power supply unit with independent safe voltage of the present utility model, its method of work mainly includes the emergent output bus method of supplying power to of AC220V and DC24V safe voltage output bus method of supplying power to.

1., DC24V safe voltage output bus method of supplying power to is:

When civil power is normal, closed QFB circuit breaker, through the AC220V/DC220V of DY switch power module rectification circuit and DC220V/DC24V chopper circuit, output DC24V safe voltage, the power supply of the actual use of now load is the civil power from electrical network.

During city electrical anomaly, the output of DN power storaging unit DC220V directly give the power supply of DY switch power module, through the DC220V/DC24V of DY switch power module chopper circuit, and output DC24V safe voltage.Now, the power supply that user load is used comes from DN power storaging unit.Due to without powering to switch power module through power inverting module output AC, can alleviate the burden of power inverting module.

2., the emergent output bus method of supplying power to of AC220V is:

When civil power is normal, civil power is directly powered to the emergent output bus of AC220V through QFA circuit breaker and KM1 A.C. contactor, whole emergency power supply unit carries out city's electro-detection and DN power storaging unit Charge Management, NB power inverting module is work not, the power supply of the now actual use of user load is the civil power from electrical network, therefore, NB power inverting module always in resting state, can effectively reach energy-conservation effect when civil power is normal.Civil power is powered to LKC charger module by QFC circuit breaker, LKC charger module is charged to DN power storaging unit by QFD circuit breaker, LKC charger module is just carried out Charge Management to DN power storaging unit, does not have the ability that DC power supply is directly provided to DN power storaging unit.

When mains-supplied is interrupted or when line voltage transfinites (± 20% specified input voltage), emergency power supply unit disconnects KM1 A.C. contactor immediately, operation NB power inverting module, the direct current energy of DN power storaging unit is reverse into AC energy, at <5ms in the time, through KM2 A.C. contactor, export to the emergent output bus of AC220V, now, the power supply that user load is used is the AC power of the NB power inverting module converts controlled by DPS controller, rather than from civil power.

When line voltage recovers normal work, after the control system of DPS controller detection civil power is normal, by synchronous grid-connected handoff technique, closed KM1 A.C. contactor, realizes from inversion power supply and forwards mains-supplied to, and now, NB power inverting module enters resting state.After this, DPS controller is powered through KM1 A.C. contactor civil power to the emergent output bus (load) of AC220V.

Above content is only to structure example of the present utility model and explanation; affiliated those skilled in the art make various modifications to described specific embodiment or supplement or adopt similar mode to substitute; only otherwise depart from the structure of utility model or surmount this scope as defined in the claims, all should belong to protection range of the present utility model.

Claims (1)

1. with an emergency power supply unit for independent safe voltage, it is characterized in that: this device includes LKC charger module, DN power storaging unit, NB power inverting module, DY switch power module, QH handover module and dsp controller, wherein,

Civil power is connected with the input of the KM1 A.C. contactor of QH handover module by QFA circuit breaker;

The input of LKC charger module is connected on the circuit between QFA circuit breaker and the input of KM1 A.C. contactor by QFC circuit breaker, and the output of LKC charger module is connected with the input of DN power storaging unit by QFD circuit breaker;

The output of DN power storaging unit is connected with the input of NB power inverting module, the output of NB power inverting module connects by the input of the KM2 A.C. contactor of QH handover module, and the output of KM1 A.C. contactor, KM2 A.C. contactor is all connected with the emergent output bus of AC220V;

The input of DY switch power module respectively be connected the QFB circuit breaker of civil power, the output of DN power storaging unit connects, the output of DY switch power module is connected with DC24V safe voltage output bus;

Dsp controller is connected with LKC charger module, NB power inverting module, DY switch power module, QH handover module respectively.

Images