High-frequency high-voltage alternating-current excitation on-off control circuit

Abstract

The utility model discloses a high-frequency high-voltage alternating-current excitation on-off control circuit, which comprises a high-frequency excitation input circuit, a pre-control high-frequency excitation output circuit, an on-off switch circuit, an on-off control circuit and a post-control high-frequency excitation output circuit, and is characterized in that the high-frequency excitation input circuit is electrically connected with the pre-control high-frequency excitation output circuit; the pre-control high-frequency excitation output circuit is electrically connected with the on-off control circuit; according to the utility model, the optical coupling electronic relay is adopted to control the on-off of the MOS tube, the MOS tube is short in conduction time and high in voltage resistance, and the optical coupling electronic relay is optically coupled and isolated from the excitation source, so that reliable work can be realized only by using the control of a small voltage and a small current; therefore, the reliability of the optical coupling electronic relay K2 is improved, the on-off response speed is effectively improved, no electric spark is generated, interference is reduced, and reliable operation of an instrument can be ensured through long-time testing.

Description

Technical Field

[0001] The utility model relates to the technical field of control circuits, in particular to a high-frequency and high-voltage alternating current excitation on-off control circuit. Background Art

[0002] There are many existing methods for controlling the on and off of signals, including analog electronic switches, relays, solid-state relays, electronic relays, etc., which can all realize the on and off of control signals. However, due to the differences in actual signal voltage, frequency, and power, different switches need to be selected for control.

[0003] After searching, the Chinese patent document application number is 202111278012.7, which discloses an electronic control relay, including a base, a relay body, a power device and a first clamping device are fixedly connected to the upper end of the base, a wire insertion hole is provided on the front end face of the base, and a storage groove is provided on the side end face of the base, and a fixing device is rotatably connected in the storage groove; a moving device is slidably connected in the base, and a second clamping device is fixedly connected at the lower end of the moving device. The invention has a simple structure and low manufacturing cost, and only simple operation is required to protect the relay.

[0004] However, the above-mentioned electronic control relay has a mechanical structure inside, which has a limited service life and mechanical fatigue. Once it is repeatedly turned on and off, sparks will appear, which will cause it to be unable to release and lose the control function, thus affecting the normal operation of the equipment. Therefore, we need to propose a high-frequency and high-voltage AC excitation on-off control circuit to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a high-frequency and high-voltage AC excitation on-off control circuit, which adopts an optically coupled electronic relay to control the on-off of a MOS tube. Reliable operation can be achieved by controlling a small voltage and a small current, thereby improving the reliability of the optically coupled electronic relay K2, effectively improving the on-off response speed, and not generating electric sparks, reducing interference. Through long-term testing, the reliable operation of the instrument can be guaranteed to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-frequency and high-voltage AC excitation on-off control circuit, comprising a high-frequency excitation input circuit, a high-frequency excitation output circuit before control, an on-off switch circuit, an on-off control circuit and a high-frequency excitation output circuit after control, wherein the high-frequency excitation input circuit is electrically connected to the high-frequency excitation output circuit before control, the high-frequency excitation output circuit before control is electrically connected to the on-off control circuit, and the on-off control circuit is respectively connected to the on-off switch circuit and the high-frequency excitation output circuit after control;

[0007] The on-off control circuit includes an optically coupled electronic relay K1, and the on-off switch circuit includes a MOS tube connected to the optically coupled electronic relay K1.

[0008] Preferably, the high-frequency excitation input circuit comprises a capacitor CE13, one end of the capacitor CE13 is grounded, and the other end of the capacitor CE13 is provided with a US_POWER interface.

[0009] Preferably, the pre-control high-frequency excitation output circuit includes a transformer T2, one side of the transformer T2 is connected to a resistor R5 and a capacitor C12 arranged in series, the other side of the transformer T2 is connected to a resistor R52 with one end grounded, and the other end of the resistor R52 is provided with a US_PLUSE interface at the connection end of the transformer T2.

[0010] Preferably, three pins of the optically coupled electronic relay K1 are connected to a resistor R51, one end of the resistor R51 is connected to a MOS tube, and two pins of the optically coupled electronic relay K1 are connected to a 5V voltage.

[0011] Preferably, the controlled high-frequency excitation output circuit includes a bidirectional diode D24, one end of the bidirectional diode D24 is connected to a resistor R57, one end of the resistor R57 is respectively connected to a resistor R53 and an inductor L1, one end of the inductor L1 is connected to four pins of the optically coupled electronic relay K1, one end of the resistor R53 is connected to the other end of the bidirectional diode D24, and the connection end between the resistor R53 and the bidirectional diode D24 is grounded.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model adopts an optically coupled electronic relay to control the on-off of the MOS tube through the cooperation of a high-frequency excitation input circuit, a high-frequency excitation output circuit before control, an on-off switch circuit, an on-off control circuit and a high-frequency excitation output circuit after control. Since the MOS tube has a fast conduction time and a high withstand voltage, and the optically coupled electronic relay itself is optically coupled and isolated from the excitation source, reliable operation can be achieved by controlling a small voltage and a small current, thereby improving the reliability of the optically coupled electronic relay K2, effectively improving the on-off response speed, and not generating electric sparks, reducing interference, and through long-term testing, the reliable operation of the instrument can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a system block diagram of the utility model;

[0015] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-2 The utility model provides a technical solution: a high-frequency and high-voltage AC excitation on-off control circuit, comprising a high-frequency excitation input circuit, a high-frequency excitation output circuit before control, an on-off switch circuit, an on-off control circuit and a high-frequency excitation output circuit after control, wherein the high-frequency excitation input circuit is electrically connected to the high-frequency excitation output circuit before control, the high-frequency excitation output circuit before control is electrically connected to the on-off control circuit, and the on-off control circuit is respectively connected to the on-off switch circuit and the high-frequency excitation output circuit after control;

[0018] The on-off control circuit includes an optically coupled electronic relay K1, and the on-off switch circuit includes a MOS tube connected to the optically coupled electronic relay K1. The MOS tube is not a mechanical structure, and its service life is increased. As long as the current is within the specified current range of the device, it will not cause on-off failure, thereby ensuring the normal operation of the instrument.

[0019] The high-frequency excitation input circuit includes a capacitor CE13, one end of which is grounded, and the other end of the capacitor CE13 is provided with a US_POWER interface. The capacitor CE13 plays a role in coupling and transmitting high-frequency signals. Since the capacitor CE13 has a lower impedance in the high-frequency signal, it can allow the high-frequency signal to pass. When the high-frequency signal is input to the other end of the capacitor CE13 through the US_POWER interface, the capacitor CE13 filters and couples the high-frequency signal. The grounding terminal is set to ensure the stability and safety of the circuit. It is usually necessary to connect one end of the capacitor to the ground to prevent static electricity or other interference in the circuit.

[0020] The pre-control high-frequency excitation output circuit includes a transformer T2, one side of the transformer T2 is connected to a resistor R5 and a capacitor C12 arranged in series, the other side of the transformer T2 is connected to a resistor R52 with one end grounded, the other end of the resistor R52 is provided with a US_PLUSE interface at the connection end of the transformer T2, and an input signal is provided through the resistor R5 and the capacitor C12 at the input end, and the resistor R5 and the capacitor C12 form a low-pass filter to eliminate high-frequency interference, and a US_PLUSE interface is provided at the output end, that is, a device or circuit for high-frequency excitation output is connected. This device or circuit may be a device for exciting high-frequency signals, such as a high-frequency transmitter, and according to the required high-frequency excitation parameters, the input end resistor R5 and the capacitor C12 are adjusted by controlling the signal at the input end to control the waveform and frequency of the output high-frequency excitation signal.

[0021] The three pins of the optical coupling electronic relay K1 are connected to a resistor R51, one end of the resistor R51 is connected to a MOS tube, and the two pins of the optical coupling electronic relay K1 are connected to a 5V voltage, so that the MOS tube can be controlled on and off by controlling the optical coupling electronic relay K1.

[0022] The controlled high-frequency excitation output circuit includes a bidirectional diode D24, one end of the bidirectional diode D24 is connected to a resistor R57, one end of the resistor R57 is respectively connected to a resistor R53 and an inductor L1, one end of the inductor L1 is connected to four pins of the optically coupled electronic relay K1, one end of the resistor R53 is connected to the other end of the bidirectional diode D24, and the connection end of the resistor R53 and the bidirectional diode D24 is grounded, the input signal is connected to one end of the bidirectional diode D24 through the resistor R57, the function of the resistor R57 is to limit the current of the input signal to protect subsequent circuit components, the other end of the bidirectional diode D24 is connected to the ground through the resistor R53 to ensure safe grounding of the circuit, the inductor L1 changes the resonant frequency of the circuit by adjusting its inductance value, and the optically coupled electronic relay K1 isolates the excitation signal through the input control signal to protect the mutual influence between the control circuit and the high-frequency output circuit.

[0023] In summary, an optically coupled electronic relay is used to control the on and off of the MOS tube. Since the MOS tube has a fast on-time and high withstand voltage, and the optically coupled electronic relay itself is optically coupled and isolated from the excitation source, reliable operation can be achieved by controlling a small voltage and a small current, thereby improving the reliability of the optically coupled electronic relay K2, effectively improving the on and off response speed, and not generating electric sparks, reducing interference. Through long-term testing, the reliable operation of the instrument can be guaranteed.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-frequency and high-voltage AC excitation on-off control circuit, comprising a high-frequency excitation input circuit, a high-frequency excitation output circuit before control, an on-off switch circuit, an on-off control circuit and a high-frequency excitation output circuit after control, characterized in that: The high-frequency excitation input circuit is electrically connected to the high-frequency excitation output circuit before control, the high-frequency excitation output circuit before control is electrically connected to the on-off control circuit, and the on-off control circuit is respectively connected to the on-off switch circuit and the high-frequency excitation output circuit after control; The on-off control circuit includes an optically coupled electronic relay K1, and the on-off switch circuit includes a MOS tube connected to the optically coupled electronic relay K1.

2. The high-frequency and high-voltage AC excitation on-off control circuit according to claim 1 is characterized in that: The high-frequency excitation input circuit includes a capacitor CE13, one end of the capacitor CE13 is grounded, and the other end of the capacitor CE13 is provided with a US_POWER interface.

3. The high-frequency and high-voltage AC excitation on-off control circuit according to claim 2 is characterized in that: The pre-control high-frequency excitation output circuit includes a transformer T2, one side of the transformer T2 is connected to a resistor R5 and a capacitor C12 arranged in series, the other side of the transformer T2 is connected to a resistor R52 with one end grounded, and the other end of the resistor R52 is provided with a US_PLUSE interface at the connection end of the transformer T2.

4. The high-frequency and high-voltage AC excitation on-off control circuit according to claim 3 is characterized in that: The three pins of the optical coupling electronic relay K1 are connected to a resistor R51, one end of the resistor R51 is connected to a MOS tube, and the two pins of the optical coupling electronic relay K1 are connected to a 5V voltage.

5. The high-frequency and high-voltage AC excitation on-off control circuit according to claim 4 is characterized in that: The controlled high-frequency excitation output circuit includes a bidirectional diode D24, one end of the bidirectional diode D24 is connected to a resistor R57, one end of the resistor R57 is respectively connected to a resistor R53 and an inductor L1, one end of the inductor L1 is connected to the four pins of the optically coupled electronic relay K1, one end of the resistor R53 is connected to the other end of the bidirectional diode D24, and the connection end between the resistor R53 and the bidirectional diode D24 is grounded.

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