阅读说明：本技术 无触点p沟道节能继电器及其电路切换方法 (Contactless P-channel energy-saving relay and circuit switching method thereof ) 是由 温常杰 于 2020-05-25 设计创作，主要内容包括：本发明涉及继电器领域,具体涉及无触点P沟道节能继电器及其电路切换方法。该节能继电器包括单线圈和双线圈两种无触点节能继电器。设置单线圈的无触点节能继电器采用第一电阻、第二电阻与第三电阻并联构成分压回路,当外部负载触点完全吸合后,第二电阻无电流,G点电位升高,绝缘栅场效应管控制控制电流减小,第一线圈电流减小,达到节能及降低线圈的发热防止长时间工作而烧毁。设置双线圈的无触点节能继电器增加外部负载触点确认功能,保证触点可靠吸合,不会引起外部负载触点没吸合牢靠,导致继电器内部切换开关反复转换而线圈震荡启动,导致外部触点震荡不能正常使用。(The invention relates to the field of relays, in particular to a contactless P-channel energy-saving relay and a circuit switching method thereof. The energy-saving relay comprises a single-coil and a double-coil non-contact energy-saving relay. The contactless energy-saving relay with the single coil adopts the first resistor, the second resistor and the third resistor which are connected in parallel to form a voltage division loop, when an external load contact is completely attracted, the second resistor has no current, the potential of a G point is increased, the control current of an insulated gate field effect tube is reduced, the current of the first coil is reduced, the purposes of saving energy and reducing the heat of the coil to prevent the coil from being burnt out due to long-time work are achieved. The double-coil contactless energy-saving relay has the advantages that the function of confirming the external load contact is added, the reliable attraction of the contact is guaranteed, the situation that the external load contact is not firmly attracted is avoided, the internal selector switch of the relay is repeatedly switched, the coil is started in a vibration mode, and the external contact cannot be normally used in a vibration mode.)

1. Contactless P channel energy-saving relay, including P channel field effect transistor, its characterized in that: the relay terminal segment B1 is connected with the first resistor R1 and the starting end of the first coil L1 in parallel; the first resistor R1 is connected with the second resistor R2, the third resistor R3 and the G point of the P-channel field effect transistor in parallel, and the tail end of the first coil L1 is connected with the D pole of the P-channel field effect transistor; the second resistor R2 is connected to the output end M through the anode of the diode; the starting end of the first coil L1 is connected with the relay terminal section B1, the tail end of the first coil is connected with the D pole of the P-channel field effect transistor, and when the first coil L1 is electrified, the relay contact is communicated with an external circuit; the control end E is connected with the negative electrode of the power supply, and the output end of the control end E is connected with the S electrode of the P-channel field effect transistor.

2. A contactless P-channel energy saving relay according to claim 1, characterized in that: the positive pole of the power supply is connected with the relay terminal section B through the fuse FU, and is connected to the relay output end M through the relay contact in the starting state.

3. A circuit switching of a contactless P-channel energy saving relay according to claim 1, characterized in that: when the external starting switch is normally opened, the first coil L1 has no current, the relay contact is normally opened, and the external load has no current;

when the external starting switch is closed, after an external current passes through the first resistor R1, the second resistor R2 and the second resistor R3 are connected in parallel for shunting, the G point of the P-channel field effect transistor reaches a conducting potential, the P-channel field effect transistor is conducted with large current, the first coil L1 is conducted, and the relay starts to pull in; when the relay is completely and reliably attracted, the relay contact is closed, the output end M is conducted with an external load, the diode is cut off, the second resistor R2 is not conducted, the potential of the G point of the P-channel field effect transistor is increased to reach the semi-conducting state of the P-channel field effect transistor, the current of the first coil L1 is halved, and the relay enters a holding state; when the external starting switch is turned on, the first coil L1 has no current, the relay is released, the contact of the relay becomes a normally open state, and the external load stops.

4. Contactless P channel energy-saving relay, including P channel field effect transistor, its characterized in that: the relay terminal segment B1 is connected with the first resistor R1 and the starting end of the first coil L1 in parallel; the first resistor R1 is connected with the second resistor R2 and the G point of the P-channel field effect transistor in parallel, and the tail end of the first coil L1 is connected with the D pole of the P-channel field effect transistor; the second resistor R2 is connected to the output end M through the anode of the diode; the starting end of the first coil L1 is connected with the relay terminal section B1, the tail end of the first coil is connected with the D pole of the P-channel field effect transistor, and when the first coil L1 is electrified, the relay contact is communicated with an external circuit; the starting end of the second coil L2 is connected with the D pole of the P-channel field effect transistor in parallel, and the tail end of the second coil L2 is connected with the S pole of the P-channel field effect transistor in parallel and then is connected to the control end E; the control end E is connected with the negative electrode of the power supply, and the output end of the control end E is connected with the S pole of the P-channel field effect transistor and the tail end of the second coil L2 in parallel.

5. The circuit switching of the contactless P-channel energy saving relay according to claim 1, characterized in that: when the external starting switch is normally opened, the first coil L1 and the second coil L2 have no current, the relay contact is normally opened, and the external load has no current;

when the external starting switch is closed, the external current returns to the cathode of the power supply through the first resistor R1, the second resistor R2 and the diode via the external load, the G point of the P-channel field effect transistor reaches a conducting potential, the first coil L1 is conducted, the second coil L2 is cut off, and the relay is attracted; when the relay is completely and reliably attracted, the relay contact is closed, the output end M is conducted with an external load, the diode is cut off, the second resistor R2 is not conducted, the voltage of a G point of the P-channel field effect transistor is equal to the power supply voltage, the P-channel field effect transistor is cut off, the first coil L1 and the second coil L2 are connected in series, the resistor is increased, and the relay enters a holding state; when the external starting switch is opened, the first coil L1 and the second current L2 have no current, the relay is released, the contact of the relay is in a normally open state, and the external load is stopped.

6. The circuit switching of the contactless P-channel energy saving relay according to claim 5, characterized in that: the number of turns of the second coil L2 is greater than 2 times the number of turns of the first coil L1, the resistance is greater than the first coil L1, and the current is less than the first coil L1.

Technical Field

The invention relates to the field of relays, in particular to a contactless P-channel energy-saving relay and a circuit switching method thereof.

Background

Disclosure of Invention

The purpose of the invention is as follows:

the invention aims to provide a non-contact P-channel energy-saving relay and a circuit switching method thereof so as to solve the problems in the prior art. Specifically, a mode of controlling a single coil or a double coil in a non-contact manner by using an insulated gate field effect transistor is adopted, and a reliability confirmation circuit of a contact circuit is adopted.

The technical scheme is as follows:

the contactless P-channel energy-saving relay comprises a P-channel field-effect tube, wherein a relay terminal segment B1 is connected with the starting ends of a first resistor R1 and a first coil L1 in parallel; the first resistor R1 is connected with the second resistor R2, the third resistor R3 and the G point of the P-channel field effect transistor in parallel, and the tail end of the first coil L1 is connected with the D pole of the P-channel field effect transistor; the second resistor R2 is connected to the output end M through the anode of the diode; the starting end of the first coil L1 is connected with the relay terminal section B1, the tail end of the first coil is connected with the D pole of the P-channel field effect transistor, and when the first coil L1 is electrified, the relay contact is communicated with an external circuit; the control end E is connected with the negative electrode of the power supply, and the output end of the control end E is connected with the S electrode of the P-channel field effect transistor.

Furthermore, the positive pole of the power supply is connected with the relay terminal section B through the fuse FU, and is connected to the relay output end M through the relay contact in the starting state.

The circuit of the contactless P-channel energy-saving relay is switched, when an external starting switch is normally opened, the first coil L1 has no current, the contact of the relay is normally opened, and an external load has no current; when the external starting switch is closed, after an external current passes through the first resistor R1, the second resistor R2 and the second resistor R3 are connected in parallel for shunting, the G point of the P-channel field effect transistor reaches a conducting potential, the P-channel field effect transistor is conducted with large current, the first coil L1 is conducted, and the relay starts to pull in; when the relay is completely and reliably attracted, the relay contact is closed, the output end M is conducted with an external load, the diode is cut off, the second resistor R2 is not conducted, the potential of the G point of the P-channel field effect transistor is increased to reach the semi-conducting state of the P-channel field effect transistor, the current of the first coil L1 is halved, and the relay enters a holding state; when the external starting switch is turned on, the first coil L1 has no current, the relay is released, the contact of the relay becomes a normally open state, and the external load stops.

The contactless P-channel energy-saving relay comprises a P-channel field-effect tube, wherein a relay terminal segment B1 is connected with the starting ends of a first resistor R1 and a first coil L1 in parallel; the first resistor R1 is connected with the second resistor R2 and the G point of the P-channel field effect transistor in parallel, and the tail end of the first coil L1 is connected with the D pole of the P-channel field effect transistor; the second resistor R2 is connected to the output end M through the anode of the diode; the starting end of the first coil L1 is connected with the relay terminal section B1, the tail end of the first coil is connected with the D pole of the P-channel field effect transistor, and when the first coil L1 is electrified, the relay contact is communicated with an external circuit; the starting end of the second coil L2 is connected with the D pole of the P-channel field effect transistor in parallel, and the tail end of the second coil L2 is connected with the S pole of the P-channel field effect transistor in parallel and then is connected to the control end E; the control end E is connected with the negative electrode of the power supply, and the output end of the control end E is connected with the S pole of the P-channel field effect transistor and the tail end of the second coil L2 in parallel.

The circuit of the contactless P-channel energy-saving relay is switched, when an external starting switch is normally open, the first coil L1 and the second coil L2 have no current, the contact of the relay is normally open, and an external load has no current; when the external starting switch is closed, the external current returns to the cathode of the power supply through the first resistor R1, the second resistor R2 and the diode via the external load, the G point of the P-channel field effect transistor reaches a conducting potential, the first coil L1 is conducted, the second coil L2 is cut off, and the relay is attracted; when the relay is completely and reliably attracted, the relay contact is closed, the output end M is conducted with an external load, the diode is cut off, the second resistor R2 is not conducted, the voltage of a G point of the P-channel field effect transistor is equal to the power supply voltage, the P-channel field effect transistor is cut off, the first coil L1 and the second coil L2 are connected in series, the resistor is increased, and the relay enters a holding state; when the external starting switch is opened, the first coil L1 and the second current L2 have no current, the relay is released, the contact of the relay is in a normally open state, and the external load is stopped.

Further, the number of turns of the second coil L2 is greater than 2 times the number of turns of the first coil L1, the resistance is greater than that of the first coil L1, and the current is smaller than that of the first coil L1.

The advantages and effects are as follows:

the invention has the following advantages and beneficial effects:

the invention designs two contactless energy-saving relays of a single coil and a double coil according to the problems in the prior art.

Regarding the contactless energy-saving relay of the single coil:

1. the energy consumption is reduced, the energy is saved, and the coil is prevented from being burnt out due to large current overheating for a long time.

2. By utilizing the characteristics of the electromagnet, after the relay is completely attracted, the iron core and the armature are reliably and tightly contacted, and then the conducting state of the relay can be kept by a small amount of holding current (about 1/3).

The first resistor, the second resistor and the third resistor are connected in parallel to form a voltage division loop, when an external load contact is completely attracted, the second resistor has no current, the potential of a G point rises, the control current of the insulated gate field effect tube is reduced, the current of the first coil is reduced, energy is saved, the heat of the coil is reduced, and the coil is prevented from being burnt out due to long-time work.

3. The single coil is formed, and the processing difficulty and the cost are reduced.

Regarding the contactless energy-saving relay of the double coil:

1. the energy consumption is reduced, the energy is saved, and the coil is prevented from being burnt out due to large current overheating for a long time.

2. The insulated gate field effect transistor is adopted to control contact conversion, the original reed reset spring and the original non-contact control are replaced, and the service life is prolonged.

3. The external load contact confirmation function is added, the reliable attraction of the contacts is ensured, the situation that the external load contact is not firmly attracted is avoided, the internal change-over switch of the relay is repeatedly switched, the coil is started in a vibration mode, and the external contact cannot be normally used in the vibration mode.

Drawings

FIG. 1 is a prior art mechanical coil switching arrangement;

FIG. 2 is a single coil contactless energy saving relay;

fig. 3 is a double-coil contactless energy-saving relay.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

fig. 1 shows a double-control energy-saving relay in the prior art.

The first coil L1 has large wire diameter, few turns, small resistance and large current; and the second coil L2 has small wire diameter (0.5 times the diameter of the first coil L1), more than 2 times of turns of the first coil L1, higher resistance than the first coil L1 and lower current than the coil L1.

The internal mechanical normally closed switch is used for switching the single-path coil and the double-path coil, the normally closed contact is disconnected according to the structure push rod after the relay is sucked, and the first coil L1 and the second coil L2 form series connection, so that the current limiting effect is achieved.