CN105406440A - Power supply load protection circuit - Google Patents
Power supply load protection circuit Download PDFInfo
- Publication number
- CN105406440A CN105406440A CN201510902436.4A CN201510902436A CN105406440A CN 105406440 A CN105406440 A CN 105406440A CN 201510902436 A CN201510902436 A CN 201510902436A CN 105406440 A CN105406440 A CN 105406440A
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- relay
- circuit
- spdt
- channel
- pole double
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/046—Signalling the blowing of a fuse
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
Abstract
The invention discloses a power supply load protection circuit, which comprises at least two channel circuits, a short circuit protection circuit, a power supply circuit and a channel switching circuit, wherein the channel switching circuit is used for switching the at least two channel circuits and is connected with the at least two channel circuits; and the at least two channel circuits, the short circuit protection circuit and the channel switching circuit are all connected with the power supply circuit. According to the power supply load protection circuit, a power amplifier and test equipment can be prevented from being damaged.
Description
Technical field
The present invention relates to a kind of protective circuit technical field, is specifically a kind of power source loads protective circuit when detecting for preventing power amplifier to be burned.
Background technology
At present when detection power amplifier, the power supply of power amplifier is directly connected with civil power, then power amplifier is connected with oscilloscope, audio analyzer again.And by the input of power amplifier access load, at the output access oscilloscope of power amplifier, audio analyzer whether normal carry out the relevant parameter of detection power amplifier by some diverter switches.Power supply due to power amplifier is directly connected with civil power, if short circuit appears in the inside of power amplifier when therefore detecting, then directly power amplifier can be burnt out, thus cause damage.In addition, because the use of these diverter switches is frequent in the extreme, if therefore directly diverter switch access power amplifier to be gone forward side by side line operate, be then easy to cause diverter switch to be damaged, thus cause the interruption of testing, and then affect detection efficiency.Therefore, for these reasons, urgently need a kind of power source loads protective circuit, this power source loads protective circuit can prevent the damage of testing equipment, to solve the problem.
Summary of the invention
The technical problem to be solved in the present invention is, provide a kind of power source loads protective circuit, this power source loads protective circuit can prevent the damage of power amplifier and testing equipment.
Technical scheme of the present invention is, provides a kind of power source loads protective circuit, comprises at least two channel circuits, short-circuit protection circuit, power circuit and the channel switching circuit for switching at least two channel circuits; Described channel switching circuit is connected with at least two channel circuits; At least two described channel circuits, short-circuit protection circuit, channel switching circuit are all connected with power circuit.
Described short-circuit protection circuit comprises a short circuit indicator light L1 and a switch S 1; The two ends of described switch S 1 are connected with the two ends of short circuit indicator light L1 respectively; One end of described short circuit indicator light L1 is connected with the live wire of civil power, and the described other end of short circuit indicator light L1 and the zero line of civil power are power output end.
Described short-circuit protection circuit also comprises voltage commutation circuit, between one end that described voltage commutation circuit is arranged on short circuit indicator light L1 and civil power; Described voltage commutation circuit comprises transformer TF1, single-pole double-throw switch (SPDT) SW11 and single-pole double-throw switch (SPDT) SW12; The primary side of described transformer TF1 is electrically connected with city; Two terminals of described transformer TF1 secondary side are connected with a tie point of single-pole double-throw switch (SPDT) SW11, a tie point of single-pole double-throw switch (SPDT) SW12 respectively; Another tie point of described single-pole double-throw switch (SPDT) SW11, another tie point of single-pole double-throw switch (SPDT) SW12 are electrically connected with city; The points of common connection of described single-pole double-throw switch (SPDT) SW11 is connected with one end of short circuit indicator light L1; The points of common connection of described single-pole double-throw switch (SPDT) SW12, the other end of short circuit indicator light L1 are power output end.
Described short-circuit protection circuit also comprises LED indicating circuit, and described LED indicating circuit is connected with one end of short circuit indicator light L1; Described LED indicating circuit comprises single-pole double-throw switch (SPDT) SW13, the LED1 lamp of different colours and LED2 lamp; The points of common connection of described single-pole double-throw switch (SPDT) SW13 is connected with one end of short circuit indicator light L1; Described single-pole double-throw switch (SPDT) SW11 and single-pole double-throw switch (SPDT) SW12, single-pole double-throw switch (SPDT) SW13 form a triac device, three Chang Kaiduan of described triac device are connected with the anode of live wire, LED2 lamp, and three normal-closed ends of described triac device are connected with the secondary side of transformer TF1, the anode of LED1 lamp; The negative electrode of described LED1 lamp is connected with one end of resistance R1, and the negative electrode of described LED2 lamp is connected with one end of resistance R2; The other end of described resistance R1, the other end of resistance R2 are electrically connected with city.
Described channel circuit is two; Described channel switching circuit comprises switch S 2, diode D2, D3, relay J DQ5, JDQ6; One end of described switch S 2 is connected with positive source; The negative electrode of the other end of described switch S 2 and the negative electrode of diode D2, diode D3, coil one end of relay J DQ5, coil one end of relay J DQ5 are connected; The coil other end of the anode of described diode D2, the anode of diode D3, relay J DQ5, the equal ground connection of the coil other end of relay J DQ5; Described relay J DQ5 and relay J DQ6 is equipped with two groups of contacts, often organizes contact and includes a normally-closed contact, a normally opened contact and a common; Two normally-closed contacts, two normally opened contacts of described relay J DQ5 are connected with one of them channel circuit respectively with a common; Two normally-closed contacts, two normally opened contacts of described relay J DQ6 are connected with another one channel circuit respectively with a common; Another common of described relay J DQ5, another common of relay J DQ6 are all connected with common ground end.
A described wherein channel circuit comprises the insert module JK1, the JK2 that insert for plug, for the output module JK3 that signal exports, and switch S 3, single-pole double-throw switch (SPDT) SW2, diode D4, D5, relay J DQ1, JDQ2, resistance R3, R4; Insert module JK1 is provided with first passage positive signal output CH1+ and first passage negative signal output CH1-; Insert module JK2 is provided with second channel positive signal output CH3+ and second channel negative signal output CH3-; Described first passage positive signal output CH1+, second channel negative signal output CH3+ are connected with the normally-closed contact of relay J DQ5, a normally opened contact respectively; Described first passage negative signal output CH1-, second channel negative signal output CH3-are connected with another normally-closed contact of relay J DQ5, another normally opened contact respectively; The input of described output module JK3 is connected with a common of the common of relay J DQ5, relay J DQ1; Coil one end of described relay J DQ1 is connected with a tie point of the negative electrode of diode D4, single-pole double-throw switch (SPDT) SW2, another normally opened contact of relay J DQ2; The anode of described diode D4 is connected with common ground end; One normally opened contact of described relay J DQ1 is connected with a common of relay J DQ2; One normally-closed contact of described relay J DQ2 is connected with one end of resistance R3; The other end of described resistance R3 is connected with one end of a normally opened contact of relay J DQ2, resistance R4; The other end of described resistance R4 is connected with common ground end; Coil one end of described relay J DQ2 is connected with the negative electrode of another tie point of single-pole double-throw switch (SPDT) SW2, diode D5, another common of relay J DQ2; The coil other end of described relay J DQ2, the anode of diode D5 are all connected with common ground end; The points of common connection of described single-pole double-throw switch (SPDT) SW2 is also connected with positive source.
A described other channel circuit also comprises short guarantor's switch S 3, and one end of described short guarantor's switch S 3 is connected with the input of output module JK3, and the other end of described short guarantor's switch S 3 is connected with common ground end.
A described wherein channel circuit comprises the insert module JK4, the JK5 that insert for plug, for the output module JK6 that signal exports, and switch S 4, single-pole double-throw switch (SPDT) SW3, diode D6, D7, relay J DQ3, JDQ4, resistance R5, R6; Insert module JK3 is provided with first passage positive signal output CH2+ and first passage negative signal output CH2-; Insert module JK2 is provided with second channel positive signal output CH4+ and second channel negative signal output CH4-; Described first passage positive signal output CH2+, second channel negative signal output CH4+ are connected with the normally-closed contact of relay J DQ6, a normally opened contact respectively; Described first passage negative signal output CH2-, second channel negative signal output CH4-are connected with another normally-closed contact of relay J DQ6, another normally opened contact respectively; The input of described output module JK6 is connected with a common of the common of relay J DQ6, relay J DQ3; Coil one end of described relay J DQ3 is connected with a tie point of the negative electrode of diode D6, single-pole double-throw switch (SPDT) SW3, another normally opened contact of relay J DQ4; The anode of described diode D6 is connected with common ground end; One normally opened contact of described relay J DQ3 is connected with a common of relay J DQ4; One normally-closed contact of described relay J DQ4 is connected with one end of resistance R5; The other end of described resistance R5 is connected with one end of a normally opened contact of relay J DQ4, resistance R6; The other end of described resistance R6 is connected with common ground end; Coil one end of described relay J DQ4 is connected with the negative electrode of another tie point of single-pole double-throw switch (SPDT) SW3, diode D7, another common of relay J DQ4; The coil other end of described relay J DQ4, the anode of diode D7 are all connected with common ground end; The points of common connection of described single-pole double-throw switch (SPDT) SW3 is also connected with positive source.
A described wherein channel circuit also comprises short guarantor's switch S 4, and one end of described short guarantor's switch S 4 is connected with the input of output module JK6, and the other end of described short guarantor's switch S 4 is connected with common ground end.
After adopting above structure, the present invention compared with prior art, has the following advantages:
The two ends of the switch S 1 of power source loads protective circuit of the present invention are connected with the two ends of short circuit indicator light L1 respectively; One end of short circuit indicator light L1 is connected with the live wire of civil power, and the described other end of short circuit indicator light L1 and the zero line of civil power are power output end.When connecting power supply, first switch S 1 being in notconnect state, then connecting power supply.If short-circuit state appears at this moment detected power amplifier, then load current can be added on short circuit indicator light L1, make short circuit indicator light L1 light to remind tester's power-off and prevent power amplifier to be burned, thus avoid loss.The channel switching circuit of power source loads protective circuit of the present invention is connected with two channel circuits; Described channel circuit, channel switching circuit are all connected with power circuit.Small current control big current is achieved by the relay in channel switching circuit and two channel circuits, even if the use of these diverter switches is frequent in the extreme, also easily cause diverter switch to be damaged, thus ensure that normally carrying out of testing, and then ensure that detection efficiency.
As improvement, described power source loads protective circuit also comprises voltage commutation circuit, between one end that described voltage commutation circuit is arranged on short circuit indicator light L1 and civil power.Different voltage can be adapted to by this voltage commutation circuit, thus make the scope of application of power source loads protective circuit of the present invention wider.
As improvement, described power source loads protective circuit also comprises LED indicating circuit, and described LED indicating circuit is connected with one end of short circuit indicator light L1.Operator can be made to be well understood to the voltage of this device work by LED indicating circuit.
As improvement, a described wherein channel circuit also comprises short guarantor's switch S 3, and one end of described short guarantor's switch S 3 is connected with the input of output module JK3, and the other end of described short guarantor's switch S 3 is connected with common ground end.Short guarantor's switch S 3 be arranged so that signal can make electric current be led away very soon, thus relay testing equipment is not shorted circuit damage to a certain extent.
As improvement, a described wherein channel circuit also comprises short guarantor's switch S 4, and one end of described short guarantor's switch S 4 is connected with the input of output module JK6, and the other end of described short guarantor's switch S 4 is connected with common ground end.Short guarantor's switch S 4 be arranged so that signal can make electric current be led away very soon, thus relay testing equipment is not shorted circuit damage to a certain extent.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of power source loads protective circuit of the present invention.
Fig. 2 is the circuit theory diagrams of channel switching circuit.
Fig. 3 is the circuit theory diagrams of a wherein channel circuit.
Fig. 4 is the circuit theory diagrams of an other channel circuit.
Fig. 5 is the circuit theory diagrams of power circuit and short-circuit protection circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, a kind of power source loads protective circuit of the present invention, comprises at least two channel circuits, short-circuit protection circuit, power circuit and the channel switching circuit for switching at least two channel circuits; Described channel switching circuit is connected with at least two channel circuits; At least two described channel circuits, short-circuit protection circuit, channel switching circuit are all connected with power circuit.Power electric routing transformer TF2, diode D1 and electrochemical capacitor E1 form.
Described short-circuit protection circuit comprises a short circuit indicator light L1 and a switch S 1; The two ends of described switch S 1 are connected with the two ends of short circuit indicator light L1 respectively; One end of described short circuit indicator light L1 is connected with the live wire of civil power, and the described other end of short circuit indicator light L1 and the zero line of civil power are power output end.
Described short-circuit protection circuit also comprises voltage commutation circuit, between one end that described voltage commutation circuit is arranged on short circuit indicator light L1 and civil power; Described voltage commutation circuit comprises transformer TF1, single-pole double-throw switch (SPDT) SW11 and single-pole double-throw switch (SPDT) SW12; The primary side of described transformer TF1 is electrically connected with city; Two terminals of described transformer TF1 secondary side are connected with a tie point of single-pole double-throw switch (SPDT) SW11, a tie point of single-pole double-throw switch (SPDT) SW12 respectively; Another tie point of described single-pole double-throw switch (SPDT) SW11, another tie point of single-pole double-throw switch (SPDT) SW12 are electrically connected with city; The points of common connection of described single-pole double-throw switch (SPDT) SW11 is connected with one end of short circuit indicator light L1; The points of common connection of described single-pole double-throw switch (SPDT) SW12, the other end of short circuit indicator light L1 are power output end.
Described short-circuit protection circuit also comprises LED indicating circuit, and described LED indicating circuit is connected with one end of short circuit indicator light L1; Described LED indicating circuit comprises single-pole double-throw switch (SPDT) SW13, the LED1 lamp of different colours and LED2 lamp; The points of common connection of described single-pole double-throw switch (SPDT) SW13 is connected with one end of short circuit indicator light L1; Described single-pole double-throw switch (SPDT) SW11 and single-pole double-throw switch (SPDT) SW12, single-pole double-throw switch (SPDT) SW13 form a triac device, three Chang Kaiduan of described triac device are connected with the anode of live wire, LED2 lamp, and three normal-closed ends of described triac device are connected with the secondary side of transformer TF1, the anode of LED1 lamp; The negative electrode of described LED1 lamp is connected with one end of resistance R1, and the negative electrode of described LED2 lamp is connected with one end of resistance R2; The other end of described resistance R1, the other end of resistance R2 are electrically connected with city.
In the present embodiment, channel circuit can be multiple, and the structure of channel circuit is all identical, namely a described wherein channel circuit comprises the insert module JK1, the JK2 that insert for plug, for the output module JK3 that signal exports, switch S 3, single-pole double-throw switch (SPDT) SW2, diode D4, D5, relay J DQ1, JDQ2, resistance R3, R4; Insert module JK1, JK2, the output module JK3 exported for signal is commercially available prod; Insert module JK1 is provided with first passage positive signal output CH1+ and first passage negative signal output CH1-; Insert module JK2 is provided with second channel positive signal output CH3+ and second channel negative signal output CH3-; Described first passage positive signal output CH1+, second channel negative signal output CH3+ are connected with the normally-closed contact of relay J DQ5, a normally opened contact respectively; Described first passage negative signal output CH1-, second channel negative signal output CH3-are connected with another normally-closed contact of relay J DQ5, another normally opened contact respectively; The input of described output module JK3 is connected with a common of the common of relay J DQ5, relay J DQ1; Coil one end of described relay J DQ1 is connected with a tie point of the negative electrode of diode D4, single-pole double-throw switch (SPDT) SW2, another normally opened contact of relay J DQ2; The anode of described diode D4 is connected with common ground end; One normally opened contact of described relay J DQ1 is connected with a common of relay J DQ2; One normally-closed contact of described relay J DQ2 is connected with one end of resistance R3; The other end of described resistance R3 is connected with one end of a normally opened contact of relay J DQ2, resistance R4; The other end of described resistance R4 is connected with common ground end; Coil one end of described relay J DQ2 is connected with the negative electrode of another tie point of single-pole double-throw switch (SPDT) SW2, diode D5, another common of relay J DQ2; The coil other end of described relay J DQ2, the anode of diode D5 are all connected with common ground end; The points of common connection of described single-pole double-throw switch (SPDT) SW2 is also connected with positive source.A described wherein channel circuit also comprises short guarantor's switch S 3, and one end of described short guarantor's switch S 3 is connected with the input of output module JK3, and the other end of described short guarantor's switch S 3 is connected with common ground end.Said structure is arranged and is multiple channel circuit to individual.
Described channel circuit is two; Described channel switching circuit comprises switch S 2, diode D2, D3, relay J DQ5, JDQ6; One end of described switch S 2 is connected with positive source; The negative electrode of the other end of described switch S 2 and the negative electrode of diode D2, diode D3, coil one end of relay J DQ5, coil one end of relay J DQ5 are connected; The coil other end of the anode of described diode D2, the anode of diode D3, relay J DQ5, the equal ground connection of the coil other end of relay J DQ5; Described relay J DQ5 and relay J DQ6 is equipped with two groups of contacts, often organizes contact and includes a normally-closed contact, a normally opened contact and a common; Two normally-closed contacts, two normally opened contacts of described relay J DQ5 are connected with one of them channel circuit respectively with a common; Two normally-closed contacts, two normally opened contacts of described relay J DQ6 are connected with another one channel circuit respectively with a common; Another common of described relay J DQ5, another common of relay J DQ6 are all connected with common ground end.
A described other channel circuit comprises the insert module JK4, the JK5 that insert for plug, for the output module JK6 that signal exports, and switch S 4, single-pole double-throw switch (SPDT) SW3, diode D6, D7, relay J DQ3, JDQ4, resistance R5, R6; Insert module JK3 is provided with first passage positive signal output CH2+ and first passage negative signal output CH2-; Insert module JK2 is provided with second channel positive signal output CH4+ and second channel negative signal output CH4-; Described first passage positive signal output CH2+, second channel negative signal output CH4+ are connected with the normally-closed contact of relay J DQ6, a normally opened contact respectively; Described first passage negative signal output CH2-, second channel negative signal output CH4-are connected with another normally-closed contact of relay J DQ6, another normally opened contact respectively; The input of described output module JK6 is connected with a common of the common of relay J DQ6, relay J DQ3; Coil one end of described relay J DQ3 is connected with a tie point of the negative electrode of diode D6, single-pole double-throw switch (SPDT) SW3, another normally opened contact of relay J DQ4; The anode of described diode D6 is connected with common ground end; One normally opened contact of described relay J DQ3 is connected with a common of relay J DQ4; One normally-closed contact of described relay J DQ4 is connected with one end of resistance R5; The other end of described resistance R5 is connected with one end of a normally opened contact of relay J DQ4, resistance R6; The other end of described resistance R6 is connected with common ground end; Coil one end of described relay J DQ4 is connected with the negative electrode of another tie point of single-pole double-throw switch (SPDT) SW3, diode D7, another common of relay J DQ4; The coil other end of described relay J DQ4, the anode of diode D7 are all connected with common ground end; The points of common connection of described single-pole double-throw switch (SPDT) SW3 is also connected with positive source.The output of power circuit is 24V.
A described wherein channel circuit also comprises short guarantor's switch S 4, and one end of described short guarantor's switch S 4 is connected with the input of output module JK6, and the other end of described short guarantor's switch S 4 is connected with common ground end.
Below only just most preferred embodiment of the present invention is described, but can not be interpreted as it is limitations on claims.The present invention is not limited only to above embodiment, and its concrete structure allows to change.In every case the various change done in the protection range of independent claims of the present invention is all in protection scope of the present invention.
Claims (9)
1. a power source loads protective circuit, is characterized in that: comprise at least two channel circuits, short-circuit protection circuit, power circuit and the channel switching circuit for switching at least two channel circuits; Described channel switching circuit is connected with at least two channel circuits; At least two described channel circuits, short-circuit protection circuit, channel switching circuit are all connected with power circuit.
2. power source loads protective circuit according to claim 1, is characterized in that: described short-circuit protection circuit comprises a short circuit indicator light L1 and a switch S 1; The two ends of described switch S 1 are connected with the two ends of short circuit indicator light L1 respectively; One end of described short circuit indicator light L1 is connected with the live wire of civil power, and the described other end of short circuit indicator light L1 and the zero line of civil power are power output end.
3. power source loads protective circuit according to claim 2, is characterized in that: described short-circuit protection circuit also comprises voltage commutation circuit, between one end that described voltage commutation circuit is arranged on short circuit indicator light L1 and civil power; Described voltage commutation circuit comprises transformer TF1, single-pole double-throw switch (SPDT) SW11 and single-pole double-throw switch (SPDT) SW12; The primary side of described transformer TF1 is electrically connected with city; Two terminals of described transformer TF1 secondary side are connected with a tie point of single-pole double-throw switch (SPDT) SW11, a tie point of single-pole double-throw switch (SPDT) SW12 respectively; Another tie point of described single-pole double-throw switch (SPDT) SW11, another tie point of single-pole double-throw switch (SPDT) SW12 are electrically connected with city; The points of common connection of described single-pole double-throw switch (SPDT) SW11 is connected with one end of short circuit indicator light L1; The points of common connection of described single-pole double-throw switch (SPDT) SW12, the other end of short circuit indicator light L1 are power output end.
4. power source loads protective circuit according to claim 3, is characterized in that: described short-circuit protection circuit also comprises LED indicating circuit, described LED indicating circuit is connected with one end of short circuit indicator light L1; Described LED indicating circuit comprises single-pole double-throw switch (SPDT) SW13, the LED1 lamp of different colours and LED2 lamp; The points of common connection of described single-pole double-throw switch (SPDT) SW13 is connected with one end of short circuit indicator light L1; Described single-pole double-throw switch (SPDT) SW11 and single-pole double-throw switch (SPDT) SW12, single-pole double-throw switch (SPDT) SW13 form a triac device, three Chang Kaiduan of described triac device are connected with the anode of live wire, LED2 lamp, and three normal-closed ends of described triac device are connected with the secondary side of transformer TF1, the anode of LED1 lamp; The negative electrode of described LED1 lamp is connected with one end of resistance R1, and the negative electrode of described LED2 lamp is connected with one end of resistance R2; The other end of described resistance R1, the other end of resistance R2 are electrically connected with city.
5. power source loads protective circuit according to claim 2, is characterized in that: described channel circuit is two; Described channel switching circuit comprises switch S 2, diode D2, D3, relay J DQ5, JDQ6; One end of described switch S 2 is connected with positive source; The negative electrode of the other end of described switch S 2 and the negative electrode of diode D2, diode D3, coil one end of relay J DQ5, coil one end of relay J DQ5 are connected; The coil other end of the anode of described diode D2, the anode of diode D3, relay J DQ5, the equal ground connection of the coil other end of relay J DQ5; Described relay J DQ5 and relay J DQ6 is equipped with two groups of contacts, often organizes contact and includes a normally-closed contact, a normally opened contact and a common; Two normally-closed contacts, two normally opened contacts of described relay J DQ5 are connected with one of them channel circuit respectively with a common; Two normally-closed contacts, two normally opened contacts of described relay J DQ6 are connected with another one channel circuit respectively with a common; Another common of described relay J DQ5, another common of relay J DQ6 are all connected with common ground end.
6. power source loads protective circuit according to claim 5, it is characterized in that: a described wherein channel circuit comprises the insert module JK1, the JK2 that insert for plug, for the output module JK3 that signal exports, switch S 3, single-pole double-throw switch (SPDT) SW2, diode D4, D5, relay J DQ1, JDQ2, resistance R3, R4; Insert module JK1 is provided with first passage positive signal output CH1+ and first passage negative signal output CH1-; Insert module JK2 is provided with second channel positive signal output CH3+ and second channel negative signal output CH3-; Described first passage positive signal output CH1+, second channel negative signal output CH3+ are connected with the normally-closed contact of relay J DQ5, a normally opened contact respectively; Described first passage negative signal output CH1-, second channel negative signal output CH3-are connected with another normally-closed contact of relay J DQ5, another normally opened contact respectively; The input of described output module JK3 is connected with a common of the common of relay J DQ5, relay J DQ1; Coil one end of described relay J DQ1 is connected with a tie point of the negative electrode of diode D4, single-pole double-throw switch (SPDT) SW2, another normally opened contact of relay J DQ2; The anode of described diode D4 is connected with common ground end; One normally opened contact of described relay J DQ1 is connected with a common of relay J DQ2; One normally-closed contact of described relay J DQ2 is connected with one end of resistance R3; The other end of described resistance R3 is connected with one end of a normally opened contact of relay J DQ2, resistance R4; The other end of described resistance R4 is connected with common ground end; Coil one end of described relay J DQ2 is connected with the negative electrode of another tie point of single-pole double-throw switch (SPDT) SW2, diode D5, another common of relay J DQ2; The coil other end of described relay J DQ2, the anode of diode D5 are all connected with common ground end; The points of common connection of described single-pole double-throw switch (SPDT) SW2 is also connected with positive source.
7. power source loads protective circuit according to claim 6; it is characterized in that: a described other channel circuit also comprises short guarantor's switch S 3; one end of described short guarantor's switch S 3 is connected with the input of output module JK3, and the other end of described short guarantor's switch S 3 is connected with common ground end.
8. power source loads protective circuit according to claim 7, it is characterized in that: a described wherein channel circuit comprises the insert module JK4, the JK5 that insert for plug, for the output module JK6 that signal exports, switch S 4, single-pole double-throw switch (SPDT) SW3, diode D6, D7, relay J DQ3, JDQ4, resistance R5, R6; Insert module JK3 is provided with first passage positive signal output CH2+ and first passage negative signal output CH2-; Insert module JK2 is provided with second channel positive signal output CH4+ and second channel negative signal output CH4-; Described first passage positive signal output CH2+, second channel negative signal output CH4+ are connected with the normally-closed contact of relay J DQ6, a normally opened contact respectively; Described first passage negative signal output CH2-, second channel negative signal output CH4-are connected with another normally-closed contact of relay J DQ6, another normally opened contact respectively; The input of described output module JK6 is connected with a common of the common of relay J DQ6, relay J DQ3; Coil one end of described relay J DQ3 is connected with a tie point of the negative electrode of diode D6, single-pole double-throw switch (SPDT) SW3, another normally opened contact of relay J DQ4; The anode of described diode D6 is connected with common ground end; One normally opened contact of described relay J DQ3 is connected with a common of relay J DQ4; One normally-closed contact of described relay J DQ4 is connected with one end of resistance R5; The other end of described resistance R5 is connected with one end of a normally opened contact of relay J DQ4, resistance R6; The other end of described resistance R6 is connected with common ground end; Coil one end of described relay J DQ4 is connected with the negative electrode of another tie point of single-pole double-throw switch (SPDT) SW3, diode D7, another common of relay J DQ4; The coil other end of described relay J DQ4, the anode of diode D7 are all connected with common ground end; The points of common connection of described single-pole double-throw switch (SPDT) SW3 is also connected with positive source.
9. power source loads protective circuit according to claim 8; it is characterized in that: a described wherein channel circuit also comprises short guarantor's switch S 4; one end of described short guarantor's switch S 4 is connected with the input of output module JK6, and the other end of described short guarantor's switch S 4 is connected with common ground end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510902436.4A CN105406440B (en) | 2015-12-09 | 2015-12-09 | Power source loads protection circuit |
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| CN105406440B CN105406440B (en) | 2017-12-01 |
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| JP2003092521A (en) * | 2001-09-18 | 2003-03-28 | Kenwood Corp | Power amplifier |
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| CN202405555U (en) * | 2012-01-13 | 2012-08-29 | 中国矿业大学 | Socket capable of preventing short circuits |
| CN203038042U (en) * | 2013-01-10 | 2013-07-03 | 福建利利普光电科技有限公司 | Series-parallel connection automatic switching device used for two-channel power supply |
| CN103199826A (en) * | 2013-02-28 | 2013-07-10 | 深圳市大族激光科技股份有限公司 | Switching circuit and switching method of analog signal channel |
| CN203688714U (en) * | 2014-01-02 | 2014-07-02 | 广东达元食品药品安全技术有限公司 | Power line inspection tool |
| CN205319675U (en) * | 2015-12-09 | 2016-06-15 | 宁波中荣声学科技有限公司 | Power load protection circuit |
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| JP2003092521A (en) * | 2001-09-18 | 2003-03-28 | Kenwood Corp | Power amplifier |
| CN1877343A (en) * | 2006-04-30 | 2006-12-13 | 深圳创维－Rgb电子有限公司 | Voltage supply system for uninterrupted-power-supply detection of electronic product performance used in production line |
| CN202405555U (en) * | 2012-01-13 | 2012-08-29 | 中国矿业大学 | Socket capable of preventing short circuits |
| CN203038042U (en) * | 2013-01-10 | 2013-07-03 | 福建利利普光电科技有限公司 | Series-parallel connection automatic switching device used for two-channel power supply |
| CN103199826A (en) * | 2013-02-28 | 2013-07-10 | 深圳市大族激光科技股份有限公司 | Switching circuit and switching method of analog signal channel |
| CN203688714U (en) * | 2014-01-02 | 2014-07-02 | 广东达元食品药品安全技术有限公司 | Power line inspection tool |
| CN205319675U (en) * | 2015-12-09 | 2016-06-15 | 宁波中荣声学科技有限公司 | Power load protection circuit |
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| CN105406440B (en) | 2017-12-01 |
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