TWI703330B - Zero point detection circuit capable of controlling switch - Google Patents

Abstract

A switch-controllable zero-point detection circuit for electrically connecting between an AC power module and a control module of a ceiling fan device. The AC power module outputs an AC signal. The switchable zero detection circuit includes two AC wires. , A chopping module, two chopping wires, an optical coupler and a switch, the AC wires are electrically connected to the AC module to transmit the AC signal, the chopping module is electrically connected to the AC wires, the The chopping wire is electrically connected to the chopping module to transmit a chopping signal, the optical coupler is electrically connected between the chopping wires and the control module to convert the chopping signal into a pulse signal, the The switch is serially connected to one of the AC wires and the chopping wires and is electrically connected to the control module. By making the switch in the non-conducting state, the chopping module and the light can be made The coupler stops working, thereby reducing power consumption.

Description

Zero point detection circuit capable of controlling switch

The present invention relates to a zero point detection circuit, in particular to a zero point detection circuit that can control a switch.

An existing zero point detection circuit is applied to a ceiling fan device. The ceiling fan device includes an AC power module and a control module. The existing zero point detection circuit is electrically connected between the AC power module and the control module. The AC power module The group is used to output an AC signal, which is converted into a pulse signal by the zero detection circuit. The control module can drive the ceiling fan to operate and change the light display according to the type of the pulse signal.

However, when the control module is not used for a long time and enters the sleep mode, the AC signal will continue to be input into the existing zero point detection circuit, and the existing zero point detection circuit will continue to convert the pulse signal. As a result, it continues to consume electricity when not in use, which is a waste of energy.

Therefore, the purpose of the present invention is to provide a switchable zero detection circuit that overcomes the disadvantages of the prior art.

Therefore, the switch-controllable zero-point detection circuit of the present invention is used for electrically connecting between an AC power module and a control module of a ceiling fan device. The AC power module outputs an AC signal. The switch-controllable zero detection circuit includes Two AC wires, one chopping module, two chopping wires, one optical coupler, and one switch.

The AC wires are electrically connected to the AC module to transmit the AC signal, and the chopping module is electrically connected to the AC wires to cleave the AC signal into a chopping signal, and the chopping signal has a plural number corresponding to the AC signal The half-wave half of the half-wave above the zero-crossing point or below the zero-crossing point, the chopping wires are electrically connected to the chopping module on the opposite side of the AC wires to transmit the chopping signal, the optical coupling The device is electrically connected between the chopping wires and the control module to convert the chopping signal into a pulse signal for output to the control module. The pulse signal has a plurality of pulse widths corresponding to the respective The half-band pulse width pulse band, the switch is connected in series to one of the AC wires and the cut-wave wires, and is used to electrically connect to the control module. The switch can be controlled by the control module. It is controlled to change between a conducting state and a non-conducting state. In the conducting state, the wires connected in series are conducting, and in the non-conducting state, the wires connected in series are not conducting.

The effect of the present invention is that by connecting the switch in series with one of the AC wires and the chopping wires, the switch can make the chopping module and the light when the switch is in the non-conducting state. The coupler stops working, thereby reducing power consumption.

2: AC wire

3: Chopping module

31: Resistance

32: Diode

4: Chopping wire

5: Optocoupler

6: Toggle switch

9: Ceiling fan device

91: AC module

92: control module

S1: AC signal

S2: Chopping signal

S21: Half-band

S3: Pulse signal

S31: Pulse band

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a system schematic diagram of a first embodiment of a zero point detection circuit capable of controlling a switch of the present invention; 2 is a schematic diagram of an AC signal, a chopping signal, and a pulse signal of the first embodiment; Fig. 3 is a system schematic diagram of a second embodiment of the zero point detection circuit of the controllable switch of the present invention; and 4 is a system schematic diagram of a third embodiment of the zero point detection circuit of the controllable switch of the present invention.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

1 and 2, a first embodiment of a zero point detection circuit capable of controlling a switch of the present invention is used to electrically connect between an AC power module 91 and a control module 92 of a ceiling fan device 9. The AC power module 91 outputs an AC signal S1.

The zero point detection circuit of the controllable switch includes two AC wires 2, a chopping module 3, two chopping wires 4, an optical coupler 5, and a switch 6.

The AC wires 2 are electrically connected to the AC module 91 to transmit the AC signal S1.

The chopping module 3 is electrically connected to the AC wires 2 to cleave the AC signal S1 into a chopping signal S2. The chopping module 3 has a resistor 31 and a two connected in series with one of the AC wires 2 The pole body 32, the chopping signal S2 has a complex number corresponding to the half wave band S21 of the half wave above the zero crossing point of the AC signal S1.

The chopping wires 4 are electrically connected to a side of the chopping module 3 opposite to the AC wires 2 to transmit the chopping signal S2.

The optical coupler 5 is electrically connected between the chopping wires 4 and the control module 92 to convert the chopping signal S2 into a pulse signal S3 for output to the control module 92. The pulse signal S3 has a pulse wave band S31 whose plural pulse widths respectively correspond to the pulse widths of the half wave bands S21.

The switch 6 is serially connected to one of the AC wires 2 and the chopping wires 4, and is used to electrically connect to the control module 92. In this embodiment, the switch 6 is a three-terminal two-way AC switch (TRIAC for short), and is connected in series with the resistor 31 and the diode 32 on the opposite side of the optocoupler 5.

The switch 6 can be controlled by the control module 92 to change between a conducting state and a non-conducting state. In the conducting state, the wires connected in series are conducting, and in the non-conducting state, the wires connected in series are conducting. The wires are not conducting.

When the ceiling fan device 9 is controlled and used normally, the control module 92 controls the switch 6 to switch to the on state. At this time, the AC wires 2 normally transmit the AC signal S1, and the wave cutting module 3 operates The chopping signal S2 is normally transmitted through the chopping wires 4, the optical coupler 5 operates normally and generates the pulse signal S3, so that the control module 92 can control the operation of the ceiling fan according to the pulse signal S3 and The lighting of the ceiling fan changes.

When the ceiling fan device 9 is not in use and enters the sleep mode, the control module 92 controls the switch 6 to switch to the non-conducting state. At this time, the corresponding AC wire 2 is disconnected, so the AC power is no longer transmitted. The signal S1, together with the subsequent chopping module 3 and the optical coupler 5, is no longer operating, so the power consumption can be greatly reduced.

Since the zero point detection circuit of the controllable switch can be controlled by the control module 92 to stop the operation of the ceiling fan device 9 when the ceiling fan device 9 enters the sleep mode to reduce the power consumption during standby, it also complies with the current power management regulations.

It should be noted that in another implementation aspect, the half-bands S21 of the chopping signal S2 generated by the chopping module 3 may also correspond to the half-waves below the zero-crossing point of the AC signal S1, and Can achieve the same effect.

Referring to Fig. 3, a second embodiment of the present invention is similar to the first embodiment, and the difference lies in: The switch 6 is a metal oxide semiconductor field effect transistor (MOSFET) and is connected in series to one of the chopping wires 4. It should be noted that in other embodiments, the switch 6 can also be a silicon controlled rectifier (SCR).

When the switch 6 is switched to the non-conducting state, since the entire circuit loop is disconnected, the chopping module 3 and the optical coupler 5 will no longer operate.

In this way, the second embodiment can also achieve the same purpose and effect as the above-mentioned first embodiment.

Referring to FIG. 4, a third embodiment of the present invention is similar to the first embodiment. The difference is that the switch 6 is a bipolar junction transistor (BJT), and is connected in series to one of them. Chopper wire 4.

When the switch 6 is switched to the non-conducting state, since the entire circuit loop is disconnected, the chopping module 3 and the optical coupler 5 will no longer operate.

In this way, the third embodiment can also achieve the same purpose and effect as the above-mentioned first embodiment.

To sum up, by connecting the switch 6 in series with one of the AC wires 2 and the chopping wires 4, the switch 6 can make the chopping module in the non-conducting state 3 and the optocoupler 5 stops working, thereby reducing power consumption, so it can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

2: AC wire

3: Chopping module

31: Resistance

32: Diode

4: Chopping wire

5: Optocoupler

6: Toggle switch

9: Ceiling fan device

91: AC module

92: control module

Claims (4)

A switch-controllable zero-point detection circuit for electrical connection between an alternating current module and a control module of a ceiling fan device. The alternating current module outputs an alternating current signal. The switchable zero detection circuit includes: two alternating currents A wire is electrically connected to the AC module to transmit the AC signal; a chopping module is electrically connected to the AC wires to cut the AC signal into a chopping signal, and the chopping signal has a plural number corresponding to the AC signal The half-wave half-wave band of one of the above or below the zero-crossing point; two chopping wires are electrically connected to the side of the chopping module opposite to the AC wires to transmit the chopping signal; an optical coupler , Electrically connected between the chopping wires and the control module to convert the chopping signal into a pulse signal for output to the control module, the pulse signal having a plurality of pulse widths corresponding to the respective A half-band pulse width pulse band; and a switch, connected in series to one of the AC wires and the chopping wires, and used to electrically connect to the control module, the switch can be controlled by the control module The group control changes between a conducting state and a non-conducting state. In the conducting state, the wires connected in series are conducting, and in the non-conducting state, the wires connected in series are not conducting. The zero point detection circuit capable of controlling a switch according to claim 1, wherein the chopping module has a resistor and a diode connected in series with one of the AC wires. The zero point detection circuit capable of controlling a switch according to claim 2, wherein the switch is a three-terminal two-way AC switch and is connected in series with the resistor and the diode on a side opposite to the optocoupler. The zero point detection circuit capable of controlling a switch according to claim 1, wherein the switch is a silicon controlled rectifier, a metal oxide semiconductor field effect transistor or a bipolar junction transistor, and is connected in series therein A cut wave wire.

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