JPH0710663U - AC solenoid drive circuit and solenoid valve using the same - Google Patents

Abstract

(57) [Summary] [Object] To provide an AC solenoid drive circuit capable of improving responsiveness when switching from an energized state to a non-energized state and reducing power consumption, and a solenoid valve using the same. [Structure] Used in a solenoid valve having a solenoid coil, a diode 2 for full-wave rectification and a varistor 3 for surge absorption in a bridge configuration are connected in parallel to a solenoid coil 1, and an LED 4 for displaying electricity is further provided. A Zener diode 5 for improving responsiveness and power consumption is connected in series. The Zener diode 5 is connected by selecting an optimum Zener voltage value in consideration of the response when the solenoid coil 1 is switched from the energized state to the non-energized state and the power consumption in the energized state of the solenoid coil 1. There is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drive circuit technology for a solenoid coil, and particularly for an AC solenoid that is used in a solenoid valve having a solenoid coil, etc., to improve responsiveness and reduce power consumption when switching to a non-energized state. The present invention relates to a technology effectively applied to a drive circuit and an electromagnetic valve using the drive circuit.

[0002]

[Prior art]

 For example, in a full-wave rectification AC solenoid drive circuit used for a solenoid valve or the like, a diode 2, a varistor 3 and an LED 4 are connected to a solenoid coil 1 as shown in FIG. The AC voltage is full-wave rectified via the diode 2 and further supplied to the solenoid coil 1.

When a full-wave rectified current is supplied to the solenoid coil 1, the energization state of the solenoid coil 1 can be confirmed by turning on the LED 4, and the LED 4 is turned off when the solenoid coil 1 is not energized. It is in a state.

Such an AC solenoid drive circuit is used, for example, in a solenoid valve having a solenoid portion having a solenoid coil, a fixed iron core and a movable iron core, and a main valve portion having an opening / closing port. The movable core of the solenoid section is driven by the control of the AC solenoid drive circuit, and the flow of the supply / discharge port of the main valve section is controlled in conjunction with the drive of the movable core.

[0005]

[Problems to be solved by the device]

 However, the conventional techniques as described above are no longer able to deal with the fluid pressure actuated devices that require high speed in recent years, that is, in the fluid actuated devices such as solenoid valves, the response of switching the solenoid coil is It is desired to improve the operability, especially the responsiveness when switching from the energized state to the non-energized state.

Therefore, an object of the present invention is to provide a drive circuit for an AC solenoid and a drive circuit for the AC solenoid, which can improve the responsiveness especially when switching from the energized state to the non-energized state and reduce the power consumption. It was to provide the solenoid valve that was used.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0008]

[Means for Solving the Problems]

 Of the devices disclosed in the present application, the outline of a typical one will be briefly described as follows.

That is, in the AC solenoid drive circuit according to the present invention, at least a rectifying element is connected to the solenoid coil, and the AC voltage applied via the rectifying element is full-wave rectified so that the solenoid coil is turned on or off. It is a drive circuit that switches to the energized state, and considers the response when the solenoid coil is switched from the energized state to the non-energized state and the power consumption of the solenoid coil in the energized state. This is to select a voltage value Zener diode and connect it in series.

In addition, the solenoid valve of the present invention includes the drive circuit for the AC solenoid, which includes a solenoid portion having a solenoid coil, a fixed iron core and a movable iron core, and a main valve portion having an opening / closing port. Used in valves, the movable iron core of the solenoid part is driven by the control of the AC solenoid drive circuit, and is linked to the drive of the movable iron core to control the flow through the supply / discharge port of the main valve part.

[0011]

[Action]

 According to the drive circuit for the AC solenoid described above, the Zener diode having the optimum Zener voltage value is connected in series to the solenoid coil, so that the solenoid coil is considered in consideration of the power consumption in the energized state. When the energization state is switched, the responsiveness can be improved especially when the energized state is switched to the non-energized state.

When the AC solenoid drive circuit is used for a solenoid valve, the movable iron core can be removed in a short time when the energized state is switched to the non-energized state, and the solenoid valve is deenergized. It is possible to improve the operating characteristics when switching between.

Further, since the Zener diode is connected in series to the solenoid coil, the current flowing through the solenoid coil can be reduced, so that the power consumption of the solenoid coil can be reduced.

With this, it is possible to improve the responsiveness when the solenoid coil is switched from the energized state to the non-energized state, and to reduce the power consumption by reducing the current flowing through the solenoid coil.

[0015]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a circuit diagram showing an AC solenoid drive circuit according to one embodiment of the present invention, FIG. 2 is a sectional view showing an electromagnetic valve using the AC solenoid drive circuit of this embodiment, and FIG. FIG. 6 is a characteristic waveform diagram showing an experimental result when the energization state is switched in the AC solenoid drive circuit of the example.

First, the configuration of the AC solenoid drive circuit of this embodiment will be described with reference to FIG.

The AC solenoid drive circuit according to the present embodiment is used, for example, in a solenoid valve having a solenoid coil, and the solenoid coil 1 includes a diode (rectifier element) 2 for full-wave rectification and a surge absorption for surge compensation. The varistor 3 is connected in parallel, and further, the LED 4 for displaying electricity and the Zener diode 5 for improving responsiveness and power consumption are connected in series.

That is, the present embodiment is different from the conventional AC solenoid drive circuit in that the Zener diode 5 is connected in series to the solenoid coil 1. This Zener diode 5 is a solenoid coil. Considering the responsiveness when 1 is switched from the energized state to the non-energized state and the power consumption of the solenoid coil 1 in the energized state, the optimum Zener voltage value is selected and connected.

Then, an AC voltage is applied from the AC power supply 6 to the AC solenoid drive circuit, and the AC voltage is full-wave rectified via the diode 2 having a bridge configuration and supplied to the solenoid coil 1. The LED 4 is turned on when is energized, while the LED 4 is turned off when the solenoid coil 1 is not energized.

The AC solenoid drive circuit configured as described above includes, for example, as shown in FIG. 2, a solenoid section 9 including a solenoid coil 1, a fixed core 7 and a movable core 8, and an input port (IN) 10. , The output port (OUT) 11 and the discharge port (EXT) 12 are used for a solenoid valve 14 and the like having a main valve portion 13 in which each supply / discharge port is opened.

The movable iron core 8 of the solenoid portion 9 is driven by the control of the AC solenoid drive circuit, and the flow of the supply / discharge port of the main valve portion 13 is controlled in conjunction with the driving of the movable iron core 8. For example, when the solenoid coil 1 is in the non-energized state, as shown in FIG. 2, the movable iron core 8 is separated from the fixed iron core 7, the input port 10 is closed, and the fluid is circulated from the output port 11 to the discharge port 12. .

On the other hand, when the solenoid coil 1 is energized, the movable iron core 8 is attracted to the fixed iron core 7 from the state shown in FIG. 2, the discharge port 12 is closed, and the fluid flows from the input port 10 to the output port 11. It is supposed to be done.

Next, the operation of the present embodiment will be described based on the result of an experiment conducted in consideration of responsiveness and power consumption in comparison with the prior art.

In this experiment, AC voltage of 100 V, 50 Hz was applied to the AC solenoid drive circuit, the voltage between the terminals of the solenoid coil 1 was measured, and a resistor was connected in series to the solenoid coil 1. Current is being measured.

As an example, a case will be described in which the solenoid coil 1 has a winding wire diameter of 0.05 mm and the Zener voltage of the Zener diode (ZDi) 5 is changed from 15V to 51V.

First, regarding the electrical characteristics shown in Table 1, as the Zener voltage value is increased, the current flowing through the solenoid coil 1 is reduced, and the power consumption is also reduced accordingly. Compared with the result obtained when the conventional Zener diode 5 is not connected, the power consumption is reduced and the power consumption is reduced.

[0028]

[Table 1]

Regarding the responsiveness shown in Table 2, as the Zener voltage value is increased, the delay time when the solenoid coil 1 is switched from the energized state to the non-energized state becomes shorter. Compared with the result obtained when the conventional Zener diode 5 is not connected, the delay time is shortened and the response is improved.

[0030]

[Table 2]

For example, when the Zener diode 5 having a Zener voltage value of 43 V is connected to the solenoid coil 1 (a) and when the conventional Zener diode 5 is not connected (b), the initial state is switched to the energized state. Further, the voltage waveform when the energized state is switched to the non-energized state is as shown in FIG. 3, and it can be judged from the waveform characteristics that the delay time is shortened from T1 to T2.

Further, regarding the operating characteristics shown in Table 3, when the movable core 8 is detached when the solenoid coil 1 is in the non-energized state, the voltage increases as the Zener voltage value increases, and the current also increases accordingly. Although it increases, when the Zener voltage value is 43 V or more, the movable core 8 is not held and vibration occurs.

This result is compared with, for example, the case where the Zener voltage value of 33 V where vibration does not occur and the case where the conventional Zener diode 5 is not connected, the voltage increases and the current also increases, and the characteristics at the time of disconnection are compared. Has been improved.

[0034]

[Table 3]

From the above experimental results, when responsiveness and power consumption were taken into consideration, when the solenoid coil 1 having a wire diameter of 0.05 mm was used, the power consumption in the electrical characteristics was small and the responsiveness was low. It is possible to determine that the Zener diode 5 having a short delay time and a large voltage / current value at the time of operation characteristics and a Zener voltage value of 33 V is optimal.

Therefore, according to the AC solenoid drive circuit of the present embodiment, the solenoid coil 1 is connected in series with the Zener diode 5 having the optimum Zener voltage value, so that the solenoid coil 1 is switched from the energized state to the non-energized state. The response time can be improved by shortening the delay time when switching.

Further, when this solenoid drive circuit is used for the solenoid valve 14, the characteristics of the operating characteristics when the movable iron core 8 is disengaged are improved, and the current flowing through the solenoid coil 1 is reduced so that the solenoid coil 1 is energized. Power consumption can be reduced.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, in the AC solenoid drive circuit of this embodiment, the case where the diode 2, the varistor 3, the LED 4 and the Zener diode 5 are connected to the solenoid coil 1 has been described. It is not limited to the example, but at least in the case of the circuit configuration in which the Zener diode and the rectifying diode, which are the features of the present invention, are connected, or when other components are connected to the configuration of FIG. Is also applicable.

Furthermore, in the present embodiment, the case where an AC voltage of AC 100 V is applied has been described, but the present invention can be similarly applied to other AC voltages, and as an example, a solenoid having a winding wire diameter of 0.05 mm. Coil 1 was used, but it is also applicable to solenoid coils with other wire diameters such as 0.03 mm and 0.06 mm. In this case, the Zener diode is optimal in consideration of responsiveness and power consumption. A Zener voltage value is selected and used.

In the above description, the invention made by the present inventor was mainly applied to the drive circuit for the AC solenoid used for the solenoid valve in the field of application thereof, but the invention is not limited to this. However, it can be widely applied to other actuating devices such as a directional control valve having a solenoid coil.

[0042]

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.

(1) Considering the response when the solenoid coil is switched from the energized state to the non-energized state and the power consumption in the energized state of the solenoid coil, the zener diode with a predetermined Zener voltage value By selecting and connecting in series, the delay time when the solenoid coil is switched from the energized state to the non-energized state can be shortened, and the responsiveness can be improved.

(2) According to the above (1), since the Zener diode is connected in series to the solenoid coil, the current flowing through the solenoid coil is reduced, and the power consumption by the solenoid coil in the energized state can be reduced. .

(3) In particular, the AC solenoid drive circuit is used for a solenoid valve having a solenoid portion having a solenoid coil, a fixed iron core and a movable iron core, and a main valve portion having an opening / closing port. In this case, the detachment time of the movable iron core when switching from the energized state to the non-energized state is shortened, and it is possible to improve the operating characteristics when switching the solenoid valve to the non-energized state.

(4) Due to the above (1) to (3), the responsiveness when the solenoid coil is switched from the energized state to the non-energized state is improved, and the current flowing through the solenoid coil is reduced to reduce the consumption. It is possible to obtain a drive circuit for an AC solenoid that can be converted to electric power and an electromagnetic valve using the drive circuit.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an AC solenoid drive circuit according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a solenoid valve using the AC solenoid drive circuit of the present embodiment.

FIG. 3 is a characteristic waveform diagram showing an experimental result when the energization state is switched in the AC solenoid drive circuit of the present embodiment.

FIG. 4 is a circuit diagram showing an AC solenoid drive circuit which is an example of a conventional technique.

[Explanation of symbols]

 1 Solenoid coil 2 Diode (rectifying element) 3 Varistor 4 LED 5 Zener diode 6 AC power supply 7 Fixed iron core 8 Movable iron core 9 Solenoid part 10 Input port 11 Output port 12 Discharge port 13 Main valve part 14 Solenoid valve

Claims (2)

[Scope of utility model registration request] 1. A drive circuit in which at least a rectifying element is connected to a solenoid coil, and the applied AC voltage is full-wave rectified through the rectifying element to switch the solenoid coil to a conducting state or a non-conducting state. In consideration of the responsiveness when the solenoid coil is switched from the energized state to the non-energized state and the power consumption in the energized state of the solenoid coil, a Zener diode having a predetermined Zener voltage value is selected in series with the solenoid coil. AC solenoid drive circuit characterized by being connected to. 2. The AC solenoid drive circuit according to claim 1 is used in a solenoid valve having a solenoid portion having a solenoid coil, a fixed iron core and a movable iron core, and a main valve portion having an opening / closing port. A drive for an AC solenoid, characterized in that the movable iron core of the solenoid portion is driven by control by the drive circuit for the AC solenoid, and the flow of the supply / discharge port of the main valve portion is controlled in conjunction with the drive of the movable iron core. Solenoid valve using a circuit.