KR101202686B1 - Quasi-continuous type dimming control system - Google Patents

Abstract

PURPOSE: A quasi-continuous dimming power control system is provided to stably maintain the dimming state of a single winding transformer in a tap conversion process by removing arc properties. CONSTITUTION: A power conversion unit(100) includes a multistage tap single winding transformer. The multistage tap single winding transformer controls power supplied to a load. The power conversion unit has a main switch and a resistor switch. The main switch is connected to a plurality of taps in the multistage tap single winding transformer. One end of the resistor switch is connected to the taps. Other end of the resistor switch is connected to a resistor connected to a common line. [Reference numerals] (100) Power conversion unit; (110) Controller; (120) Output ON/OFF switch; (130) Wireless communication unit; (140) Wire communication unit; (150) Display/KEYPAD; (AA) Input power; (BB) Server

Description

Quasi-continuous type dimming control system

The present invention relates to a dimming power control system, and more particularly, to a dimming power control system of a semi-continuous conversion type that enables stable power control by maintaining a dimming state of a single winding transformer even when a tap is switched by sequential switch movement. will be.

In the case of power supplied to homes or industrial sites, there are many unstable factors due to changes in load or external environment. In response to such a situation, a method for supplying stable power to a load has been proposed. In this case, a coil is usually wound to a desired voltage, or a plurality of output taps are provided to output various voltages.

For example, a plurality of taps (a, b, c, etc.) may be placed on a secondary winding (usually, the number of turns is not fixed) that is excited in the primary winding (usually, the number of turns is fixed) to output various levels of voltage. One way to do this is to.

In this case, if a voltage of 220V is applied to the primary winding, if each tap of the secondary winding is designed to decompress by 5V, 200V from the first tap (a), 205V from the second tap (b), and the third A voltage of 210V can be output from the tap c to the output terminal. That is, discrete output voltages with large deviations are selectively output. Therefore, this conventional method does not provide the precise and fine voltage adjustment as desired by the user.

In addition, according to the conventional method, it is difficult to control the power stably in a situation that requires the installation of the power control device in a location that is difficult to access easily, such as outdoors, high-rise, dangerous places. Moreover, if the power control is operating abnormally there was a disadvantage that the user can not monitor and control it.

In order to solve the problems posed by the above-described prior art, No. 10-0919504, 'Power Regulator and Remote Power Control Device' (hereinafter referred to as 'registered patent'), registered by the applicant, has a number of primary turns. The present invention provides a remote control device that selects a voltage by changing both without fixing the secondary turns ratio and thereby enables fine and precise power control remotely (see FIG. 1).

The patent has a power input line for providing a power regulator for converting the fine and precise voltage to output the voltage by changing both without fixing the ratio of the number of primary turns and secondary turns; A primary winding connected to the power input line and surrounding the iron core; A secondary winding having at least a portion of the primary winding in common with the primary winding; At least one tab connected to a predetermined point of the primary winding to specify a number of turns of both the primary winding and the secondary winding; At least one switching means, one end of which is connected to the at least one tab and the other end of which is connected to a common line, to change the number of turns of both the primary winding and the secondary winding; And an output line for outputting power generated in the secondary winding excited by the primary winding, wherein both the primary winding and the secondary winding are closed as any one of the at least one switching means is closed. The number of turns of is determined.

However, since the registered patent has only an output voltage corresponding to each tap when each tap is connected (in the case of a three-stage single tap single winding transformer, there are three possible output voltage steps), it operates in a step conversion method when dimming a lamp. Due to the voltage difference between the taps, the operator can perceive the light change and add fatigue. That is, there is a limit that smooth continuous dimming change is not possible.

Accordingly, an object of the present invention is to remove the arc characteristic that the current flowing through the switch is disconnected when the switch is turned off, so that the single winding transformer can maintain a stable dimming state at the time of tap switching, and at the same time, make a smooth continuous dimming change. To provide a dimming power control system of a semi-continuous conversion method.

In addition, another object of the present invention is to provide a dimming power control system of a semi-continuous conversion method that can be finely adjusted the output voltage step by enabling the output voltage of the intermediate level of the voltage corresponding to each tap implemented.

In addition, another object of the present invention is to provide a dimming power control system of a semi-continuous conversion method to enhance the characteristics of the semi-permanent switch by removing mechanical noise and mechanical wear characteristics according to the switching.

Another object of the present invention is to provide a dimming power control system of a semi-continuous conversion method that enhances soft switching characteristics by improving zero-crossing characteristics and switch speed.

In the dimming power control system of the semi-continuous conversion method according to the present invention for achieving the above object, in the dimming power control system having a power converter including a multi-stage tap single winding transformer for dimming the power supplied to the load. ,

The power conversion unit has a main switch connected to a plurality of tabs of the multi-stage tap single winding transformer, one end of which is connected to the common line, and one end of which is connected to the plurality of tabs, and the other end of the power converter is connected to a common line. Each of the connected resistance switch is in parallel with the main switch.

At this time, the power conversion unit of the dimming power control system of the semi-continuous conversion method according to the present invention, when switching from the first tap to the second tap of the plurality of taps, the first state of the ON (ON) of the main switch A first step of turning on a first resistor switch of the resistor switches connected in parallel with the main switch; A second step of turning on a second resistance switch connected to the second tab; A third step of turning off the first main switch connected to the first tab; A fourth step of turning on a second main switch connected to the second tab; A fifth step of turning off the first resistor switch connected to the first tab; And a sixth step of turning off the second resistor switch connected to the second tab.

In addition, the dimming power control system of the semi-continuous conversion method according to the present invention, if the load is a lamp, the bypass switch for the initial lighting of the lamp; And a dimming switch for changing to a dimming step after a predetermined time passes after the lamp is turned on.

In addition, the dimming power control system of the semi-continuous conversion method according to the present invention for achieving the above object, in the dimming power control system of the lamp controlled by wireless communication from a remote server, the power supply line of the lamp and A control unit which measures power information of an input power source, transmits the measured power information and power control state information to the server, and controls a dimming of the lamp by controlling a power conversion unit according to a control signal of the server; A wireless communication unit which wirelessly transmits the power information and the power control state information to the server under control of the controller, and transmits a dimming control command transmitted from the server to the controller; A wired communication unit which transmits the power information and the power control state information to the server under the control of the controller, and transmits a dimming control command transmitted from the server to the controller; And a multistage tap single winding transformer consisting of a winding, a first tap, a second tap, and a third tap, and each main switch having one end connected to a plurality of taps provided in the multistage tap single winding transformer and the other end connected to a common line. And a resistance switch connected in parallel with the main switch, one end of which is connected to the plurality of tabs and the other end of which is connected to a common line, to adjust power of the lamp according to a dimming control signal of the controller. It is characterized by consisting of a conversion unit.

In this case, the main switch of the power conversion unit of the dimming power control system of the semi-continuous conversion method according to the present invention is composed of first, second and third main switches connected to the first tap, the second tap and the third tap, respectively. The resistance switch may include first, second and third resistance switches connected to the first tap, the second tap, and the third tap, respectively, and switch from the first tap to the second tap of the two or more taps. The first main switch is changed to an OFF state when the first resistance switch is changed to an ON state from the ON state and the second resistance switch is changed to an ON state. The first resistor switch is changed from the ON state to the ON state only when the first main switch is ON and changes to the OFF state when the second main switch is changed to the ON state. The second resistance switch is changed to an ON state after the first resistance switch is changed to an ON state. And the first resistance switch is changed to the OFF state after being changed to the OFF state, and the second main switch is turned on after the first main switch is changed to the OFF state. Changed to the state, characterized in that for performing the switch of the tap.

In this case, the power conversion unit of the dimming power control system of the semi-continuous conversion method according to the present invention, the bypass switch for the initial lighting of the lamp; And a dimming switch for changing to a dimming step after a predetermined time passes after the lamp is turned on.

As described above, the present invention has the advantage that the single winding transformer can stably maintain the dimming state even when the tap is switched by removing the arc characteristic.

In addition, the present invention has the advantage that can be finely adjusted the output voltage step, thereby reducing the toroidal manufacturing cost and has the effect of miniaturization.

In addition, the present invention has the effect that can be used semi-permanently by removing the mechanical noise due to switching and by removing the mechanical wear characteristics.

In addition, the present invention has an effect capable of further improved soft switching through improving the zero crossing characteristics and the switch speed.

1 is a circuit diagram of a power regulator according to the prior art,
2 is a circuit diagram of a power conversion unit of a dimming power control system according to the present invention;
3 is an overall configuration diagram of a dimming power control system according to the present invention to which the power converter of FIG. 2 is applied;
4 to 9 are circuit diagrams sequentially illustrating a switching procedure of the power converter of FIG.
FIG. 10 is a circuit diagram illustrating an example of an output voltage when a resistor is connected to the power converter of FIG. 2 instead of a switch. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. It should be noted that the same configurations of the drawings denote the same reference numerals as possible whenever possible. Specific details are set forth in the following description, which is provided to provide a more thorough understanding of the present invention. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

First, FIG. 2 is a circuit diagram of a power conversion unit of the dimming power control system according to the present invention, which shows a state in which the first switch SW1 is ON. FIG. 3 is a view illustrating the power conversion unit of FIG. The overall configuration of the dimming power control system.

2 and 3, the power converter 100 according to the present invention is a multi-stage tap single winding transformer 10 consisting of a winding, the first tap, the second tap and the third tap, and the first switch (SW1) to ninth switch SW9 are provided.

The first switch SW1 to the ninth switch SW9 are turned on / off according to the dimming control signal S3 of the control unit 110 to output the dimming output voltage of the multi-stage tap single winding transformer 10 of the power regulator 100. Adjust. In order to perform this more efficiently, the first switch SW1 to the sixth switch SW6 are constituted by a small capacity switch such as a relay or an SSR, and the seventh switch SW7 and the eighth switch SW8 are It is preferably composed of a large capacity switch such as a relay and an electronic switch, and the ninth switch SW9 is preferably composed of an electronic switch.

The power converter 100 according to the present invention is characterized in that the single winding transformer 10 maintains a dimming state even when the tap is switched because at least one switch is turned on through the shunt winding. Accordingly, the dimming power control system according to the present invention can prevent a phenomenon in which the whole switch of the shunt winding is turned off through a damping resistance when the switch is moved between taps.

Referring to FIG. 3, the output on / off switch 120 for turning on / off the dimming output S4 changed in a quasi continuous conversion method by the power converter 100 of FIG. 2. The electronic device may further include a first sensor 160 that measures voltage, current, power factor information, and the like in order to collect power information of the power supply line 101 to which the dimming output S4 is supplied. The output on / off switch 120 may be the ninth switch SW9 of FIG. 2.

On the other hand, in addition to the first sensor 160 for measuring the power of the output unit, a second sensor 170 for measuring the power of the input unit is also provided. The power information S2 of the output unit and the power information S1 of the input unit measured by the first sensor 160 and the second sensor 170 are applied to the control unit 110, and the control unit 110 controls the power conversion unit ( It is the determination data for generating the dimming control signal (S3) output to control the 100.

In addition, the wireless communication unit 130 and the wired communication unit 140 reports the state of the dimming power control system according to the present invention to the remote server 200 by wireless or wired, and remotely dimming control command from the server 200 Received and transmitted to the control unit 110.

On the other hand, the dimming power control system according to the present invention displays the internal state for the dimming power control or outputs the situation to the administrator, the display and keypad 150 for receiving a command for the dimming power control command or setting change of the administrator It may be provided separately.

Referring to FIG. 2, in the multi-stage tap single winding transformer 10, a primary winding and a secondary winding are wound around a single iron core, and the primary winding is picked up to a predetermined length from the primary winding, which becomes a secondary winding. Accordingly, in the present invention, the first tap, the second tap, and the third tap are taken from the primary winding so that both the primary winding and the secondary winding can be changed, and a pair of switches respectively correspond to each of the taps. It is provided. The first switch SW1 and the second switch SW2 are connected to the first tap, and the second switch SW2 is connected to the common line through the first resistor R1. Similarly, the third and fourth switches SW3 and SW4 and the fifth and sixth switches SW5 and SW6 are connected to the second and third taps, respectively, and the fourth switch SW4 and the sixth switch SW6, respectively. It is connected to the common line through the second resistor R2 and the third resistor R3.

Meanwhile, the seventh switch SW7 is a dimming switch, the eighth switch SW8 is a bypass switch, and the ninth switch SW9 operates as an output on / off control switch.

In the case of lamps, there is a characteristic that it does not affect the lifespan when power is supplied stably during initial lighting. In order to satisfy this characteristic, the eighth switch SW8 operates as a bypass switch when the initial power is turned on, turns on the lamp, and then changes the dimming step to a necessary dimming step after a predetermined time. Referring to FIG. 2, when bypassing, the eighth switch SW8 is turned on, and the seventh switch SW7 which is a dimming switch is turned off. Thereafter, as shown in FIG. 2, the eighth switch SW8 is turned off and the seventh switch SW7 is turned on to perform a dimming operation. As shown in FIG. 2, the power converter 100 applied to the dimming power control system according to the present invention is different from that in the case of the three-stage tap single winding transformer according to the related art, only the number of taps configured as an output voltage step exists. Alternatively, by connecting the switch through a resistor, the output voltage in the middle of the voltage corresponding to each tap is possible, so that the main switch (SW1, SW3, SW5) and the resistance switch (SW2, SW4) can be used even when using a three-stage single winding transformer. , SW6) can be used up to 18 levels of output voltage. As a result, more precise distribution of the voltage difference between the taps results in a result closer to quasi continuous characteristics in the dimming control.

Therefore, it is not necessary to use an excessive multi-stage toroidal, thereby reducing the manufacturing cost and miniaturization. In addition, by using the resistance switches SW2, SW4, and SW6, even if the main switches SW1, SW3, and SW5 are turned off, the current flow is not interrupted, and thus the arc characteristic is removed. In addition, by using a combination of relays and SSR, the switch can be used semi-permanently by minimizing mechanical noise and wear. In addition, soft switching is further facilitated through improved zero crossing characteristics and switching speed.

Hereinafter, the switching procedure according to the quasi-continuous conversion method of the dimming power control system according to the present invention will be described in detail with reference to FIGS. 2 and 4 to 9. 4 through 9 are circuit diagrams sequentially illustrating a switching procedure of the power converter of FIG. 2, and a process of switching from a first tap to a second tap will be described in detail with reference to the accompanying drawings.

First, referring to FIG. 2, FIG. 4 illustrates a state in which the first switch SW1 is turned on as a first step for converting the first switch SW1 and the second switch SW2. Next, referring to FIG. 4, FIG. 4 shows a second step in which the second switch SW2 is turned on and both the first switch SW1 and the second switch SW2 are turned on.

5 shows a third step in which the fourth switch SW4 is turned on and the first, second and fourth switches SW1, SW2 and SW4 are turned on. At this time, the output voltage is only when the first switch SW1 is on when the difference between the output voltage when the first switch SW1 is closed and the output voltage difference (step voltage) when the third switch SW3 is closed is Δ. It is a value obtained by adding about 1 / 3Δ to the voltage at the time.

Next, referring to FIG. 6, the first switch SW1 is turned off and proceeds to the fourth step in which only the second switch SW2 and the fourth switch SW4 are turned on, and the output voltage at this time is the first switch ( This is a value obtained by adding about 1 / 2Δ to the voltage when only SW1) is on.

As shown in FIG. 7, the fifth step is a state in which the third switch SW3 is turned on in the fourth step, and the output voltage at this time is about 2 / w to the voltage when only the first switch SW1 is turned on. The value obtained by adding up 3Δ is obtained.

FIG. 8 is a sixth step in which the second switch SW2 is turned off so that only the third switch SW3 and the fourth switch SW4 are turned on, and the output voltage at this time is determined by the third switch SW3. It becomes the voltage when it is on.

9 is a seventh step, in which the fourth switch SW4 is turned off and only the third switch SW3 is turned on. At this time, the output voltage is the third switch SW3 as in the sixth step. The transition from the first tap to the second tap is completed while maintaining the voltage when is on. The same procedure is sequentially performed at the third switch SW3 to the sixth switch SW6 in the switching from the second tap to the third tap.

Therefore, in the dimming power control system according to the present invention, switching between taps is performed by a semi-continuous conversion method.

FIG. 10 is a circuit diagram illustrating an example of an output voltage when a resistor is connected to the power converter of FIG. 2 instead of a switch, and the first resistor R1 is used instead of the switch to the first tap T1 and the second tap T2, respectively. ) And the dimming power control system according to the present invention will be described in detail with reference to an embodiment when the second resistor R2 is connected.

N1, N2 and N3 in FIG. 10 are the tap-turn winding ratios of the multi-stage tap single winding transformer 10, and Vt1, Vt2 and Vt3 represent the tap-to-tap voltage difference of the multistage tap single winding transformer 10. In FIG. When N1, N2, and N3 are 30, 190, and 110, respectively, the sum of the first winding ratio N1, the second winding ratio N2, and the third winding ratio N3 is 330, and the first winding ratio N1 and the second winding ratio are 330. The sum of the turns ratio N2 is 220, and only the third winding ratio N3 is 110.

Then, when the input voltage Vi is 220 V, when Kirchhoff's voltage law is applied to the input circuit, the following equations (1) to (3) can be obtained.

Also, when the ideal loss of the single winding transformer is 0, the power consumed at the output load RL is equal to the power supplied by the input according to the law of energy conservation (input supply power == output power consumption). The following equation 4 can be obtained by applying the current law.

When Vx is obtained using Equations 1 to 4, since Vx is 0.7875, Vt1 = 30Vx = 23.6V. As a result, when the input voltage is 220V, the output voltage is 220V 23.6V = 196.4V. Therefore, it is possible to provide an output of 190V when the first tap T1 of the single winding transformer 10 is connected and a voltage (196.4V) which is an intermediate step of 200V when the second tap T2 is connected.

As described above, the dimming power control system according to the present invention enables the dimming control of the quasi-continuous conversion method, and unlike the conventional stepwise dimming, soft and natural dimming does not allow the operator to feel the change of light when the dimming changes. In addition to savings, it is possible to provide a more comfortable working environment.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

Claims (6)

delete A dimming power control system having a power converter including a multi-stage tap single winding transformer for dimming and controlling power supplied to a load.
The power converter has a main switch having one end connected to a plurality of taps provided in the multi-stage tap single winding transformer and the other end connected to a common line, and one end connected to the plurality of taps and the other end connected to a resistor connected to the common line. Each connected resistor switch is provided in parallel with the main switch,
The power converter,
A first switch for turning on a first resistor switch among the resistor switches connected in parallel with a first main switch in an on state among the main switches when the first tap is switched to the second tap among the plurality of taps; Stage 1;
A second step of turning on a second resistance switch connected to the second tab;
A third step of turning off the first main switch connected to the first tab;
A fourth step of turning on a second main switch connected to the second tab;
A fifth step of turning off the first resistor switch connected to the first tab; And
And a sixth step of turning off the second resistance switch connected to the second tap, to perform switching of the tap.
The method of claim 2,
A bypass switch for initial lighting of the lamp when the load is a lamp; And
And a dimming switch for changing to a dimming step after a predetermined time after the lamp is turned on.
delete In the dimming power control system of the lamp controlled by wireless communication from a remote server,
Measuring power information of the power supply line and the input power of the lamp, and transmits the measured power information and power control state information to the server, and controls the power converter according to the control signal of the server to dimming the lamp. A control unit for controlling; A wireless communication unit which wirelessly transmits the power information and the power control state information to the server under control of the controller, and transmits a dimming control command transmitted from the server to the controller; A wired communication unit which transmits the power information and the power control state information to the server under the control of the controller, and transmits a dimming control command transmitted from the server to the controller; And a multistage tap single winding transformer consisting of a winding, a first tap, a second tap, and a third tap, and a main switch having one end connected to a plurality of taps provided in the multistage tap single winding transformer and the other end connected to a common line. And a resistance switch connected in parallel with the main switch, one end of which is connected to the plurality of tabs and the other end of which is connected to a common line, to adjust power of the lamp according to a dimming control signal of the controller. A conversion unit;
The main switch includes first, second, and third main switches connected to the first tap, the second tap, and the third tap, respectively, and the resistance switch is configured to the first tap, the second tap, and the third tap, respectively. Consists of the first, second, third resistance switch to be connected,
When switching from the first tab to the second tab,
The first main switch is changed to an OFF state when the first resistance switch is changed to an ON state from the ON state and the second resistance switch is changed to an ON state,
The first resistance switch is changed from the ON state to the ON state only when the first main switch is ON, and is changed to the OFF state when the second main switch is changed to the ON state. ,
The second resistance switch is changed to an ON state after the first resistance switch is changed to an ON state, and is changed to an OFF state after the first resistance switch is changed to an OFF state. Become,
And the second main switch is changed to an ON state after the first main switch is changed to an OFF state, thereby performing switching of the taps.
The method of claim 5, wherein the power conversion unit,
A bypass switch for initial lighting of the lamp; And
And a dimming switch for changing to a dimming step after a predetermined time after the lamp is turned on.

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