WO2012061989A1

WO2012061989A1 - Power supplying system for electrical appliance device

Info

Publication number: WO2012061989A1
Application number: PCT/CN2010/078639
Authority: WO
Inventors: 陈志宏
Original assignee: 达能科技股份有限公司
Priority date: 2010-11-11
Filing date: 2010-11-11
Publication date: 2012-05-18

Abstract

A power supplying system (100) for an electrical appliance device includes an illumination detecting unit (1) for detecting the illumination of environment and outputting a corresponding illumination level signal (S1), an illumination judgment circuit (2) which modulates an adjusted voltage (S2) with the illumination level signal (S1) and outputs it to a pulse width modulating and control circuit (3) and outputs a modulated signal (S3), a current switching unit (4) which is controlled by the modulated signal (S3) and outputs a DC voltage (Vdc) when turned on, a DC-to-AC conversion unit (5) for converting the DC voltage (Vdc) into an AC voltage and supplying it to the electrical appliance device, and a power supply circuit (6) which mainly comprises an electric energy storing unit (62), a DC-to-AC conversion circuit (61), a path switching unit (63) and an electric power abnormality judgment unit (64). The path switching unit (63) has several connection nodes (631, 632, 641) respectively connected with a first AC power supply (ACV1), the DC-to-AC conversion circuit (61), and the electric energy storing unit (62). When the first AC power supply (ACV1) supplies power abnormally, the power needed by the electrical appliance device is supplied by a battery supply (DC+).

Description

Electric power supply system for electrical equipment

The present invention relates to an electric power supply system for an electric appliance, and more particularly to an electric power supply system capable of automatically adjusting brightness according to ambient lighting and supplying electric power required by an electric appliance from a battery power supply when an abnormal electric power supply is abnormal. Background technique

Light illumination is a very important invention of human beings and has been closely related to human daily life. However, the principle of relying on the power supply to generate light, the technology of today, has become a fact that cannot be changed and broken. However, as the earth's applicable energy sources tend to be scarce, the "energy saving" appeal of electronic devices has become an important issue. In order to achieve effective "energy saving", in order to slow down the exhaustion of energy, the reverse thinking of adjusting the illumination brightness of the illuminating elements with the illumination of natural light has emerged.

One of the existing adjustment devices for the brightness of the light bulb is also a common one, which uses a pressing action of a switch to adjust the working state of the plurality of light bulbs, and manually adjusts and controls the number of light bulbs to be turned on by manually pressing the switch. Change the brightness of the overall light bulb. This way, it is mostly used for indoor lighting. However, when only a few light bulbs are lit, the light tends to be distributed only in some corners of the room, resulting in uneven illumination. On the other hand, due to the frequent use of certain light bulbs, the use of depreciation for a long time Relationship, compared with other bulbs, the brightness will be obviously insufficient. If the bulbs that are used more often are replaced, the brightness will be stronger than that of other bulbs, not only the lack of uneven distribution of illumination light, but also the visual Unbalanced doubts.

Another dimming device of the existing light-emitting element, the user adjusts a variable resistor VR to change the input voltage of the control device, and the control device outputs a corresponding working voltage to the light-emitting element according to the input voltage, thereby modulating Light source brightness. However, this way of adjusting the brightness of the bulb still needs to be manually adjusted according to the current ambient light, which is quite inconvenient.

In addition, High Intensity Discharge (HID), such as Xenon Lamp, is often used as a car light. It uses high pressure to excite helium electrons, A light source is generated between the two electrodes of the xenon lamp, which is called a gas discharge. The white super-strong arc light produced by helium can increase the color temperature value of the light, similar to the white light of the sun. The amount of current required for the operation of the xenon lamp is smaller than that of the conventional bulb, but the brightness can be several times, and the service life is relatively high. Longer.

Further, in the prior art, in order to be able to maintain basic light illumination when the light illumination is suddenly interrupted, an emergency lighting product is generally used. Such emergency lights typically have a built-in battery or battery to provide illumination when the emergency light is on during a power outage. Such emergency lights are typically mounted independently in emergency exits, doorways, or stairwells.

Although these emergency lights are convenient, they are very troublesome in the future maintenance and maintenance. Therefore, some people have designed to install batteries in general indoor lighting fixtures, so that in the event of a power outage, the batteries can be supplied with electricity to provide emergency for indoor lighting. The function of lighting. This eliminates the cost of additional purchases of many independent emergency lights and installation costs.

Although the existing battery is integrated into indoor lighting fixtures as an emergency lighting product, it can achieve the expected effect, but there is no intelligent judgment as to whether the user manually turns off the switch and powers off, or is really supplied by the power supply company. The condition of the power supply interruption. Summary of the invention

Accordingly, it is an object of the present invention to provide a gas discharge lamp constant light control device that utilizes the advantages of a gas discharge lamp and allows it to automatically adjust the brightness of a gas discharge lamp according to ambient light, and can be emitted by a gas discharge lamp. The brightness can be kept at a preset brightness according to the ambient light, and the "energy saving" effect can be achieved without using manual control.

Another object of the present invention is to provide a power-off power supply device for an electric appliance, which can intelligently discriminate a control system for supplying electric power required by an electric appliance from a battery power source when an abnormality in power supply.

In order to achieve the above object, the present invention uses an illuminance detecting unit to detect the illuminance in the environment, and outputs a corresponding brightness level signal to a brightness judging circuit, and the brightness judging circuit is changed by using the brightness level signal. Adjusting the voltage; a pulse width modulation control circuit changes the duty cycle of the output modulated signal according to the level of the adjusted voltage; the modulated signal controls a current on Turning off or off the unit, when the conduction is on, outputting a DC voltage, which is applied to the AC conversion unit and converted to an AC voltage by the AC discharge lamp; through the DC to AC conversion unit The magnitude of the output AC voltage is proportional to the length of the DC voltage application time. Therefore, when the duty cycle of the modulation signal changes, the on-time of the current switching unit controlled by the modulation signal also changes, thereby changing the magnitude of the AC voltage. , thereby changing the brightness of the gas discharge lamp.

In the power supply circuit of the present invention, a DC to AC conversion circuit is connected to an electrical energy storage unit, and a path switching unit has a plurality of contacts respectively connected to a first AC power source, a DC to AC conversion circuit, and an electrical energy storage unit. A power abnormality determining unit can determine whether the first AC power source is normally supplied, and generate a path switching control signal to control the action of the path switching unit.

In terms of efficacy, the present invention automatically uses the illumination value detected by the illumination detection unit when the ambient illumination changes, and the adjustment voltage is changed by the brightness determination circuit, and the pulse width modulation control circuit modulates the duty cycle of the modulation signal. Changing the time during which the current switch unit is turned on and the AC voltage applied to the gas discharge lamp, the brightness of the gas discharge lamp is changed, and the brightness generated by the gas discharge lamp can be kept constant at a constant brightness according to the ambient brightness. purpose.

Furthermore, the present invention normally supplies power to the electrical equipment from the AC power source when the normal AC power supply is normal. When the regular AC power supply is powered off, the second AC power supply is immediately supplied to the electrical equipment under the control of the control circuit of the present invention. When the present invention is applied to illumination, it is possible to function as a power failure illumination or emergency illumination when the power is abnormal. DRAWINGS

Figure 1 shows a block diagram of a preferred embodiment of the present invention;

2 is a circuit diagram showing a preferred embodiment of the present invention;

Figure 3 is a circuit diagram showing an embodiment of the power supply circuit of Figure 1.

Reference number:

100 electrical equipment supply system

1 illuminance detection unit Brightness discrimination circuit pulse width modulation control circuit current switching unit DC to AC conversion unit bridge push circuit oscillation circuit

Power circuit

DC to AC conversion circuit Battery power input Power output Power storage unit Path switching unit First contact

Second contact

Common joint

Third junction

Common joint

Electric coil

Power abnormality discriminating unit Wireless transmitting unit a, 641b AC power input terminal Wireless receiving unit a Control signal output terminal Rectifier circuit

Current limiting unit

Gas discharge lamp AC VI first AC power supply

ACV2 second AC power supply

Vdc DC voltage

CI capacitor

Tl

Q1~Q6 comparator

J1~J11 transistor

Rl feedback resistor

R2~R7 feedback voltage divider resistor

R8~R14 first voltage dividing resistor

R15~R16 second voltage dividing resistor

SI brightness level signal

S2 adjustment voltage

S3 modulated signal

LK L2 power line

DC+ battery power

LK L2 power line

S61 path switching control signal

S62 wireless signal

Referring to FIG. 1 , a constant light control circuit 100 according to the present invention includes: an illuminance detecting unit 1, a brightness determining circuit 2, a pulse width modulation control circuit 3, a current switching unit 4, a DC-to-AC conversion unit 5, and a power supply circuit. 6. The illuminance detecting unit 1 may be a light sensing element or a solar panel for detecting the illuminance in the environment, and outputting a corresponding brightness level signal S1 to the brightness discriminating circuit 2. The brightness discriminating circuit 2 uses the brightness level signal S1 to change the input to The pulse width modulation control circuit 3 adjusts the voltage S2.

The pulse width modulation control circuit 3 modulates the duty cycle of the output modulated signal S3 in accordance with the level of the adjustment voltage S2. When the current switching unit 4 is turned on, the DC voltage Vdc supplied from the power supply circuit 6 is outputted to the DC to AC conversion unit 5, and the ON and OFF of the current switching unit 4 are controlled by the modulation signal S3. The DC to AC conversion unit 5 is used to convert the DC voltage Vdc into an AC voltage required for the operation of the gas discharge lamp 8.

A current limiting unit 7 is connected in series between the current switching unit 4 and the DC to AC conversion unit 5 for stabilizing the current flowing therethrough.

Please refer to FIG. 2, which is a circuit diagram of a preferred embodiment of the present invention. Here, the gas discharge lamp 8 is exemplified by a xenon lamp. The DC-to-AC conversion unit 5 includes a bridge push circuit 52 and an oscillating circuit 54. The DC voltage Vdc is applied to the bridge push circuit 52 via a capacitor C1. The gates of the transistors J2, J3, J4, and J5 in the bridge push circuit 52 are electrically connected to the oscillation circuit 54 respectively, and the transistors J2 are controlled by the oscillation circuit 54. The conduction state of J3, J4, J5 enables the conversion of the DC voltage Vdc to the AC voltage required to provide the operation of the xenon lamp. The feedback resistor R1 returns the voltage signal of the contact point F to the pulse width modulation control circuit 3.

The current switching unit 4 includes a coupler T1 and a transistor J1. The modulation signal S3 is applied to the primary measuring coil of the coupler T1, and the secondary side coil is used to control the transistor J1. When the current switching unit 4 is turned on (Turn ON), the DC voltage Vdc can be conducted to the current limiting unit 7, and after the current limiting unit 7 is stabilized, the DC to the AC converting unit 5 is reached.

The brightness determination circuit 2 mainly includes a plurality of resistors R2 to R16, comparators Q1 to Q6, and transistors J6 to J11. Among them, R2 to R7 are used as feedback voltage dividing resistors, R8 to R14 are used as first voltage dividing resistors, and R15 to R16 are used as second voltage dividing resistors. When the illuminance detecting unit 1 outputs the brightness level signal S1 to the brightness discriminating circuit 2, the brightness level signal S1 is divided by the first voltage dividing resistors R8, R9, R10, Rl l, R12, R13, R14 to the comparator. Ql, Q2, Q3, Q4, Q5, Q6, after the comparator and the second voltage divider resistors R15, R16 form a partial voltage comparison, and then control the conduction of the transistors J6, J7, J8, J9, J10, Jl l State to determine the feedback voltage divider resistors R2, R3, R4, R5, Parallel state between R6, R7 and feedback resistor R1.

When the level of the brightness level signal S1 is increased, after being compared to the comparators Q1, Q2, Q3, Q4, Q5, and Q6, some or even all of the transistors may be turned off, so that only the conduction is turned on. The resistors connected to the transistors are effectively connected in parallel. If only transistors J6, J7, and J8 are turned on, R2, R3, and R4 are effectively connected in parallel.

The feedback voltage dividing resistors R2, R3, R4, R5, R6, and R7 of the brightness discriminating circuit 2 are electrically coupled to the feedback resistor R1, so the voltage dividing circuit 2 is fed back to the voltage dividing resistors R2, R3, R4, R5, and R6. The parallel result of R7 will affect the voltage value of the feedback signal from the feedback resistor R1, which is the adjustment voltage S2. For example, the voltage of the adjustment voltage S2 generated by the effective parallel connection between the voltage divider resistors R2, R3, R4, R5, R6 and R7 will be less than the adjustment voltage S2 generated when R2, R3 and R4 are effectively connected in parallel. Voltage value. Therefore, the brightness judging circuit 2 can change the adjustment voltage S2 by using the brightness level signal S1.

The pulse width modulation control circuit 3 compares the internally generated triangular wave with the result of adjusting the voltage S2 level, and generates a sequence of pulse waves, which is the modulated signal S3. The pulse width (i.e., duty cycle) of the modulation signal S3 varies with the level of the adjustment voltage S2. Since the modulation signal S3 is well known to those skilled in the art, the detailed principles thereof will not be described herein.

When the modulation signal S3 has a large duty cycle, the on-time of the transistor J1 becomes large, and the output voltage also becomes large, and conversely, the output voltage becomes small. For example, the AC voltage generated by the modulated signal S3 at 80% duty cycle will be greater than the operating voltage generated by the modulated signal S3 at 30% duty cycle.

When the night comes, the illumination detecting unit 1 detects the ambient light level and outputs a low level brightness level signal S1. The brightness determining circuit 2 uses the low level signal to lower the level of the adjusting voltage S2 and modulate The signal S3 will be a pulse wave having a large duty cycle, so that the AC voltage output from the DC to AC conversion unit 5 becomes large, and the brightness of the gas discharge lamp 8 is increased.

When it is dawning, the illuminance detecting unit 1 detects the ambient illuminance and outputs a medium-level brightness level signal S1, and the brightness determining circuit 2 receives the medium-level signal, so that the adjusting voltage S2 is made. The level of the modulation is increased, and then the pulse width modulation control circuit 3 modulates the pulse width, and the duty cycle of the output modulated signal S3 becomes smaller, so that the AC voltage outputted by the DC to AC conversion unit 5 becomes smaller, and the gas discharge lamp 8 is made smaller. The brightness is reduced.

Referring to FIG. 3, the power supply circuit 6 of the present invention mainly includes: a DC-to-AC converter, at least one power storage unit 62, a path switching unit 63, and a power abnormality determining unit 64. The power supply circuit 6 supplies the operating voltage required for the gas discharge lamp 8 via the power lines L1, L2, and immediately switches the supply of the gas by the battery power source when it is determined that the first AC power source ACV1 supplied by the power system of the regular power supply is abnormal (power failure:) The discharge lamp 8 requires power. In the present embodiment, the gas discharge lamp 8 is an electric device (i.e., load:) as the power supply circuit 6.

The DC-to-AC conversion circuit 61 converts the DC voltage supplied from the energy storage unit 62 into an AC voltage. The DC to AC conversion circuit 61 has a battery power input terminal 611 connected to the electrical energy storage unit 62 for introducing the battery power supply DC+ supplied by the electrical energy storage unit 62. The battery power supply DC+ is converted from a DC to an AC conversion circuit. The power output 612 of 61 outputs a second AC power source ACV2.

The electrical energy storage unit 62 can include one or more batteries and is free to choose a lead acid battery, a lithium battery, a nickel hydrogen battery, or other unit that can store electrical power.

The path switching unit 63 includes a first contact 631 connected to the first AC power source ACV1 o. The second contact 632 of the path switching unit 63 is connected to the power output 612 of the DC to AC conversion circuit 61. One of the first contact 631 and the second contact 632 is conducted by a switch to a common contact 633, and the common contact 633 is connected to an electrical load. A third contact 634 is coupled to the electrical energy storage unit 62 and the battery power input 611 of the DC to AC conversion circuit 61. The third contact 634 can also be turned on by a switch to a common contact 635 and the common contact 633 is connected to the electrical energy storage unit 62.

The conduction or non-conduction state between the first contact 631, the second contact 632 and the common contact 633 can be determined by the excitation or demagnetization of an electric coil 636. Moreover, the conduction or non-conduction state between the third contact 634 and the common contact 635 may also be determined by the excitation or demagnetization of the electric coil 636. The power abnormality determining unit 64 is connected to the electrical energy storage unit 62 and the first alternating current power source ACV1 for determining whether the first alternating current power source ACV1 is normally supplied, and generating a path switching control signal S61 for controlling the power coil of the path switching unit. Whether the 636 is excited or demagnetized, thereby controlling the conduction or non-conduction state between the first contact 631, the second contact 632 and the common contact 633, and the conduction or non-conduction state between the third contact 634 and the common contact 635. .

In the embodiment of the present invention, the power abnormality determining unit 64 includes: a wireless transmitting unit 641 having an AC power input terminal 641a, 641b connected to the first AC power source ACV1, which is generated when the first AC power source ACV1 is normally supplied. A wireless signal S62. A wireless receiving unit 642 is coupled to the electrical energy storage unit 62 for receiving a wireless signal S2 generated by the wireless transmitting unit 641. The wireless receiving unit 642 has a control signal output 642a.

When the first AC power supply ACV1 is supplied normally, the wireless receiving unit 642 normally receives the wireless signal S2, so the path switching control signal S61 is not generated. At this time, it is supplied from the first AC power source ACV1 via the first contact point 631.

When the first AC power source ACV1 is in an abnormal state such as power supply interruption or power failure, the wireless transmitting unit 641 cannot generate the wireless signal S62, so the wireless receiving unit 641 generates the path switching control signal S61 to the power in the path switching unit 63. The coil 636 is configured to open the first contact 631 of the path switching unit 63, the second contact 632 is turned on, and the third contact 634 is turned on. Therefore, the power storage unit 62 supplies the battery power DC+ via the third contact 634. The battery power input terminal 611 is supplied to the DC to AC conversion circuit 61, and the second AC power source ACV2 is supplied from the power output terminal 612 of the DC to AC conversion circuit 61, and is supplied to the electric device via the second contact 632.

Claims

Claim

An electric power supply system for an electric appliance, characterized by comprising:

a power circuit for supplying a DC voltage;

An illuminance detecting unit is configured to detect the illuminance in the environment and output a corresponding brightness level signal;

a brightness determining circuit electrically connected to the illuminance detecting unit, and using the brightness level signal to change an adjusting voltage;

a pulse width modulation control circuit, receiving the adjustment voltage, and outputting a modulation signal, and the pulse width modulation control circuit changes a duty cycle of the modulation signal according to the adjustment voltage; a current switching unit connecting the a power supply circuit, wherein the current switching unit is controlled by the modulation signal, and outputs the DC voltage when turned on;

A DC to AC conversion unit for converting the DC voltage into an AC voltage and supplying it to an electrical device.

The power supply system for an electric appliance according to claim 1, wherein said power supply circuit comprises a rectifying circuit for introducing an alternating current power source and rectifying the output into a direct current voltage to said current switching unit.

The power supply system for an electric appliance according to claim 1, further comprising a current limiting unit, wherein the current limiting unit is connected in series between the current switching unit and the DC to AC conversion unit.

The electric power supply system for an electric appliance according to claim 1, wherein the electric device is a gas discharge lamp, and the gas discharge lamp comprises a xenon lamp.

The power supply system for an electric appliance according to claim 1, wherein the DC to AC conversion unit comprises:

a bridge driving circuit for receiving the DC voltage output by the current switching unit and electrically connecting to the gas discharge lamp; An oscillating circuit that controls the bridge push circuit by the oscillating circuit to cause the bridge push circuit to convert the DC voltage to an AC voltage supplied to the gas discharge lamp.

The electric power supply system of the electric appliance of claim 1 , wherein the DC to AC conversion unit further comprises a feedback resistor electrically coupled to the gas discharge lamp for adjusting the The voltage is fed back to the pulse width modulation control circuit.

The power supply system for an electric appliance according to claim 6, wherein the brightness determination circuit comprises:

a plurality of first voltage dividing resistors, wherein the first resistors are connected in series to receive the brightness level signal;

a plurality of comparators, wherein one input end of the comparator is electrically connected to each series node of the first resistor, and the other input end is connected to a node of a plurality of second voltage dividing resistors that generate a preset voltage dividing value Electrically connecting, so that the partial pressure of each node of the first resistor and the preset partial pressure value are respectively compared;

a plurality of transistors, wherein gates of the transistors are respectively coupled to an output end of the comparator, and a comparison result output by the comparator controls whether the transistor is turned on or not;

a plurality of feedback voltage dividing resistors are electrically connected to the transistors and connected in parallel with the feedback resistors, and the connected feedback voltage dividing resistors are effectively connected in parallel through the turned-on transistors, thereby changing The voltage is adjusted.

The power supply system for an electric appliance according to claim 1, wherein the power supply circuit comprises:

a first alternating current power source;

At least one electrical energy storage unit for supplying a battery power source;

a DC to AC conversion circuit is connected to the electrical energy storage unit for introducing the battery power source, and after being converted, a second AC power source is outputted from a power output terminal, and the DC to AC conversion circuit includes a battery power input End, connected to the electrical energy storage unit;

- the path switching unit, having:

a first contact connected to the first alternating current power source; a second contact is connected to the power output end of the DC to AC conversion circuit; a third contact is connected to the battery power input end of the electric energy storage unit and the DC to AC conversion circuit;

a power abnormality determining unit connected to the electrical energy storage unit and the first alternating current power source for determining whether the first alternating current power supply is normally supplied, and generating a path switching control signal to control an action of the path switching unit;

When the first power supply is normal, the first contact in the path switching unit is turned on, and the second contact is open, so the first alternating current power is supplied to the electrical device via the first contact; When the first power supply is abnormal, the power abnormality determining unit determines that a path switching control signal is generated to control the path switching unit to operate, so that the first contact in the path switching unit is open, and the second contact is turned on. The third contact is turned on, the electric energy storage unit supplies the battery power, is supplied to the DC to AC conversion circuit via the third contact, and generates the second AC power from the DC to AC conversion circuit. Provided to the electrical device via the second contact.

The power supply system of the electric appliance according to claim 8, wherein the power abnormality determining unit comprises:

a wireless transmitting unit having an AC power input end connected to the first AC power source, generating a wireless signal when the first AC power supply is normal;

a wireless receiving unit, connected to the electrical energy storage unit, capable of receiving a wireless signal generated by the wireless transmitting unit, the wireless receiving unit having a control signal output end;

The wireless signal received by the wireless receiving unit when the AC power supply is normal;

When the AC power supply is abnormal, the wireless transmitting unit cannot generate the wireless signal, so the wireless receiving unit generates the path switching control signal to the path switching unit, so that the path switching unit When the contact is open, the second contact is turned on, and the third contact is turned on.