CN116812689A - Power supply circuit, control circuit and elevator - Google Patents
Power supply circuit, control circuit and elevator Download PDFInfo
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- CN116812689A CN116812689A CN202310797028.1A CN202310797028A CN116812689A CN 116812689 A CN116812689 A CN 116812689A CN 202310797028 A CN202310797028 A CN 202310797028A CN 116812689 A CN116812689 A CN 116812689A
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Abstract
The application relates to a power supply circuit, a control circuit and an elevator. The power supply circuit includes: a first relay including a first coil; one end of the first coil is used for being connected with a detection power supply loop; the movable end of the first switch relay is connected with the other end of the first coil and is also used for being connected with one end of the brake coil; the fixed end of the first switch relay is used for being connected with a detection power supply loop and a brake power supply respectively; the first switching relay is used for conducting the first coil; a second relay including a second coil; one end of the second coil is used for being connected with a detection power supply loop; the movable end of the second switch relay is connected with the other end of the second coil and is also used for being connected with a brake power supply; the stationary end of the second switch relay is used for being connected with a detection power supply loop and is also connected with the other end of the brake coil. The power supply circuit can reduce noise.
Description
Technical Field
The application relates to the technical field of elevators, in particular to a power supply circuit, a control circuit and an elevator.
Background
At present, normally open contacts of two contactors are generally used for power supply control of a brake of an elevator and are connected in series to a power supply loop of the brake, coils of the two contactors are supplied with power by a safety loop, when the safety loop is disconnected, the coils of the contactors lose power, the normally open contacts of the contactors are disconnected, and the power supply of the brake is cut off, so that the brake is released to stop the elevator.
However, the conventional elevator braking method or the conventional method has problems such as large noise of the contactor.
Disclosure of Invention
In view of the above, it is necessary to provide a power supply circuit, a control circuit, and an elevator capable of reducing noise.
In a first aspect, the present application provides a power supply circuit comprising:
a first relay including a first coil; one end of the first coil is used for being connected with a detection power supply loop;
the movable end of the first switch relay is connected with the other end of the first coil and is also used for being connected with one end of the brake coil; the fixed end of the first switch relay is used for being connected with a detection power supply loop and a brake power supply respectively; the first switching relay is used for conducting the first coil;
A second relay including a second coil; one end of the second coil is used for being connected with a detection power supply loop;
the movable end of the second switch relay is connected with the other end of the second coil and is also used for being connected with a brake power supply; the stationary end of the second switch relay is used for being connected with a detection power supply loop and is also connected with the other end of the brake coil.
In one embodiment, the first switching relay comprises a first single pole double throw relay; the normally open end of the first single-pole double-throw relay is used for connecting one end of a brake coil; the normally closed end of the first single-pole double-throw relay is connected with the other end of the first coil;
the second switching relay comprises a second single pole double throw relay; the normally open end of the second single-pole double-throw relay is used for accessing a brake power supply; the normally closed end of the second single-pole double-throw relay is connected with the other end of the second coil.
In one embodiment, the power supply circuit further comprises:
the third relay comprises a first normally open contact and a second normally open contact; one end of the first normally open contact is connected with the other end of the first coil; the other end of the first normally open contact is connected with the normally closed end of the first single-pole double-throw relay; one end of the second normally open contact is connected with the other end of the second coil; the other end of the second normally open contact is connected with the normally closed end of the second single-pole double-throw relay.
In one embodiment, one end of the normally open contact of the first relay is connected to the other end of the first coil; the other end of the normally open contact of the first relay is connected with the stationary end of the first switch relay;
one end of a normally open contact of the second relay is connected with the other end of the second coil; the other end of the normally open contact of the second relay is connected with the stationary end of the second switching relay.
In one embodiment, the power supply circuit further comprises:
the fixed end of the third switching relay is connected with the fixed end of the first switching relay; the movable end of the third switching relay is respectively used for being connected with a brake power supply and detecting a power supply loop; the movable end of the third switch relay is also connected with the other end of the first coil through a normally open contact of the first relay;
the fixed end of the fourth switching relay is connected with the fixed end of the second switching relay; the movable end of the fourth switch relay is respectively used for being connected with a brake power supply and detecting a power supply loop; the movable end of the fourth switching relay is also connected with the other end of the second coil through a normally open contact of the second relay.
In a second aspect, the present application provides a control circuit comprising:
One end of a normally open contact of the first relay is used for being connected with a power supply of a safety loop;
one end of the normally open contact of the second relay is connected with the other end of the normally open contact of the first relay;
one end of a coil of the first switching relay is connected with the other end of the normally open contact of the second relay; the other end of the coil of the first switching relay is used for being connected with a power supply of a safety loop;
the coil of the second switching relay is connected with the coil of the first switching relay in parallel;
the input end of the switching power supply is connected with one end of a normally open contact of the first relay and is also used for connecting a safety loop; the output end of the switching power supply is used for conducting the detection power supply loop under the condition that the safety loop is conducted.
In one embodiment, the control circuit further comprises:
a third relay including a third coil; one end of the third coil is connected with a power supply of the safety loop through a normally closed contact of the second relay and a normally closed contact of the first relay in sequence; the other end of the third coil is used for connecting with a power supply of a safety loop; one end of the normally closed contact of the third relay is connected with the other end of the normally open contact of the second relay; the other end of the normally closed contact of the third relay is connected with one end of the coil of the first switching relay.
In one embodiment, one end of the normally open contact of the first relay is used to connect the safety circuit.
In one embodiment, the control circuit further comprises:
the coil of the third switching relay is connected with the coil of the first switching relay in parallel;
and the coil of the fourth switching relay is connected with the coil of the first switching relay in parallel.
In a third aspect, the present application provides an elevator comprising a detection power loop, a safety loop, and a brake; the brake comprises a brake coil and a brake power supply; the elevator further comprises:
a first relay including a first coil; one end of the first coil is connected with a detection power supply loop; one end of a normally open contact of the first relay is connected with a power supply of a safety loop;
the movable end of the first switch relay is connected with the other end of the first coil and is also connected with one end of the brake coil; the fixed end of the first switch relay is respectively connected with a detection power supply loop and a brake power supply; the first switch relay conducts the first coil; one end of a coil of the first switching relay is connected with a power supply of the safety loop;
a second relay including a second coil; one end of the second coil is connected with a detection power supply loop; one end of the normally open contact of the second relay is connected with the other end of the normally open contact of the first relay; the other end of the normally open contact of the second relay is connected with the other end of the coil of the first switch relay;
The movable end of the second switch relay is connected with the other end of the second coil and is also connected with a brake power supply; the stationary end of the second switch relay is connected with a detection power supply loop and is also connected with the other end of the brake coil; the coil of the second switching relay is connected with the coil of the first switching relay in parallel;
the input end of the switching power supply is connected with one end of a normally open contact of the first relay and is also connected with a safety loop; the output end of the switching power supply is conducted with the detection power supply loop under the condition that the safety loop is conducted.
The power supply circuit, the control circuit and the elevator comprise a first relay, wherein the first relay comprises a first coil; one end of the first coil is used for being connected with a detection power supply loop; the movable end of the first switch relay is connected with the other end of the first coil and is also used for being connected with one end of the brake coil; the fixed end of the first switch relay is used for being connected with a detection power supply loop and a brake power supply respectively; the first switching relay is used for conducting the first coil; a second relay including a second coil; one end of the second coil is used for being connected with a detection power supply loop; the movable end of the second switch relay is connected with the other end of the second coil and is also used for being connected with a brake power supply; the stationary end of the second switch relay is used for being connected with a detection power supply loop and is also connected with the other end of the brake coil. The power supply circuit can realize that both ends of the brake coil are connected with a brake power supply under the action of the corresponding control circuit, the loop where the brake coil is positioned is fully conducted, the brake coil is electrified, and then the brake is started; the power supply circuit can also stop supplying power to the brake coil under the action of the corresponding control circuit so as to close the brake. The control circuit includes: one end of a normally open contact of the first relay is used for being connected with a power supply of a safety loop; one end of the normally open contact of the second relay is connected with the other end of the normally open contact of the first relay; one end of a coil of the first switching relay is connected with the other end of the normally open contact of the second relay; the other end of the coil of the first switching relay is used for being connected with a power supply of a safety loop; the coil of the second switching relay is connected with the coil of the first switching relay in parallel; the input end of the switching power supply is connected with one end of a normally open contact of the first relay and is also used for connecting a safety loop; the output end of the switching power supply is used for conducting the detection power supply loop under the condition that the safety loop is conducted. Through the control circuit, the power supply circuit can be controlled when the safety circuit is switched on, so that the brake coil is powered on, and when the safety circuit is not switched on, the brake coil is powered off, a contactor is not used, an elevator programmable electronic safety system is not used, the circuit elements are few, the structure is simple, the cost is low, the noise of an elevator is effectively reduced, and meanwhile, the running safety and stability are improved.
Drawings
FIG. 1 is a block diagram of a power supply circuit in one embodiment;
FIG. 2 is a block diagram of a power supply circuit in another embodiment;
FIG. 3 is a block diagram of a power supply circuit in yet another embodiment;
FIG. 4 is a block diagram of the control circuitry in one embodiment;
FIG. 5 is a block diagram of a control circuit in another embodiment;
FIG. 6 is a block diagram of a control circuit in yet another embodiment;
fig. 7 is a block diagram of a control circuit in yet another embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
At present, the scheme of adopting the contactor to carry out power supply control to the brake of elevator has the defect that, for example, the noise that the contactor action produced is too big, thereby the contactor is bulky makes the switch board volume be difficult to further reduce, the action jamming of contactor leads to the trouble to increase, the contactor electrical life is shorter to influence the whole life-span etc. of elevator. In the above background, with the popularization of elevator programmable electronic safety systems (pessals), in recent years, a contactor-free technical solution based on elevator programmable electronic safety systems has been developed, which adopts a multi-channel redundancy structure to realize low failure rate by mounting two or more programmable systems, and a contactor-free brake power supply control can be realized by using a technical solution based on elevator programmable electronic safety systems, but extremely complex multi-channel systems often bring high failure rate and high cost.
In one embodiment, as shown in fig. 1, there is provided a power supply circuit including:
a first relay including a first coil 110; one end of the first coil 110 is used for being connected to a detection power supply loop;
the first switch relay 120, the moving end of the first switch relay 120 is connected with the other end of the first coil 110, and is also used for connecting with one end of the brake coil; the stationary end of the first switching relay 120 is used for being connected to the detection power supply loop and the brake power supply respectively; the first switching relay 120 is used for conducting the first coil 110;
a second relay including a second coil 130; one end of the second coil 130 is used for being connected to a detection power supply loop;
the moving end of the second switch relay 140 is connected with the other end of the second coil 130 and is also used for connecting with a brake power supply; the stationary end of the second switching relay 140 is used for being connected to the detection power supply loop and is also connected to the other end of the brake coil.
Specifically, the detection power supply loop can be controlled to be conducted, and under the condition that the coil of the first switching relay 120 is controlled to be electrified, the first coil 110 of the first switching relay 120 can be conducted, wherein the coil of the first switching relay 120 can be positioned in a corresponding control circuit; in case the coil of the second switching relay 140 is controlled to be powered, the second switching relay 140 may conduct the second coil 130 of the second relay, wherein the coil of the second switching relay 140 may be located in the corresponding control circuit. In the case where both the first coil 110 and the second coil 130 are turned on, both ends of the brake coil are connected to a brake power source, and a loop in which the brake coil is located is completely turned on, and the brake coil is powered on, so that the brake is turned on.
Further, the power supply loop can be detected to be disconnected by control, and in the case that the coil of the first switching relay 120 is controlled to be powered off, the first coil 110 of the first relay is powered off; in the case of controlling the power loss of the coil of the second switching relay 140, the second coil 130 of the second relay is powered down; the loop where the brake coil is located is disconnected, and the brake coil is powered off, so that the brake stops working.
In some examples, one end of the first coil 110 may be connected to the positive pole of the first detection power supply loop, and the stationary end of the first switching relay 120 may be connected to the negative pole of the first detection power supply loop; one end of the second coil 130 may be connected to the negative pole of the second detection power supply loop; the stationary end of the second switching relay 140 may be connected to the positive electrode of the second detection power supply loop; the first detection power supply loop and the second detection power supply loop can be the same detection power supply loop or two different detection power supply loops; the first detection power supply loop and the second detection power supply loop can be controlled to be conducted simultaneously.
The power supply circuit comprises a first relay, wherein the first relay comprises a first coil; one end of the first coil is used for being connected with a detection power supply loop; the movable end of the first switch relay is connected with the other end of the first coil and is also used for being connected with one end of the brake coil; the fixed end of the first switch relay is used for being connected with a detection power supply loop and a brake power supply respectively; the first switching relay is used for conducting the first coil; a second relay including a second coil; one end of the second coil is used for being connected with a detection power supply loop; the movable end of the second switch relay is connected with the other end of the second coil and is also used for being connected with a brake power supply; the stationary end of the second switch relay is used for being connected with a detection power supply loop and is also connected with the other end of the brake coil. The power supply circuit can realize that both ends of the brake coil are connected with a brake power supply under the action of the corresponding control circuit, the loop where the brake coil is positioned is fully conducted, the brake coil is electrified, and then the brake is started; the power supply circuit can stop supplying power to the brake coil under the action of the corresponding control circuit so as to close the brake, and the contactor and the elevator programmable electronic safety system are not used, so that the elevator noise is effectively reduced, and meanwhile, the operation safety and stability are improved.
In one embodiment, as shown in fig. 2, the first switching relay 120 comprises a first single pole double throw relay; the normally open end of the first single-pole double-throw relay is used for connecting one end of a brake coil; the normally closed end of the first single pole double throw relay is connected with the other end of the first coil 110;
the second switching relay 140 comprises a second single pole double throw relay; the normally open end of the second single-pole double-throw relay is used for accessing a brake power supply; the normally closed end of the second single pole double throw relay is connected to the other end of the second coil 130.
Specifically, the active end of the first switching relay 120 may include a normally open end of the first single pole double throw relay for connecting one end of the brake coil and a normally closed end of the first single pole double throw relay; the normally closed end of the first single pole double throw relay is connected with the other end of the first coil 110; the stationary end of the first switching relay 120 may include a common end of the first single pole double throw relay, i.e., the common end of the first single pole double throw relay may be used to access the detection power supply loop and the brake power supply, respectively. In the case where the coil of the first single pole double throw relay is energized, the first single pole double throw relay may be used to turn on the first coil 110, with the normally closed end of the first single pole double throw relay open, and the normally open end of the first single pole double throw relay closed, thereby turning on one end of the brake coil and one pole of the brake power supply (e.g., brake power supply positive pole pow+). Wherein the coil of the first single pole double throw relay may be located in the corresponding control circuit. It should be noted that, the positions of the common end of the first single-pole double-throw relay and the common end of the first single-pole double-throw relay may be interchanged, so that the same circuit functions of the embodiment of the present application may be implemented.
The active end of the second switching relay 140 may include a normally open end of the second single pole double throw relay for accessing the brake power supply and a normally closed end of the second single pole double throw relay; the normally closed end of the second single pole double throw relay is connected to the other end of the second coil 130; the stationary end of the second switching relay 140 may include a second single pole double throw relay common end, i.e., the second single pole double throw relay common end may be used to access the detection power supply loop, the second single pole double throw relay common end also being connected to the other end of the brake coil. In the event that the coil of the second single pole double throw relay is energized, the second single pole double throw relay may be used to turn on the second coil 130, with the normally closed end of the second single pole double throw relay open, and the normally open end of the second single pole double throw relay closed, thereby turning on the other end of the brake coil and the other pole of the brake power supply (e.g., brake power supply negative pole POW-). Wherein the coil of the second single pole double throw relay can be located in the corresponding control circuit. By the mode, the two ends of the brake coil are connected with the brake power supply, the loop where the brake coil is positioned is completely conducted, the brake coil is electrified, and then the brake acts. It should be noted that, the positions of the common end of the second single-pole double-throw relay and the common end of the second single-pole double-throw relay may be interchanged, so that the same circuit function of the embodiment of the present application may be implemented.
Further, the power supply loop can be detected to be disconnected by control, and in the case that the coil of the first switching relay 120 is controlled to be powered off, the first coil 110 of the first relay is powered off; in the case of controlling the power loss of the coil of the second switching relay 140, the second coil 130 of the second relay is powered down; the loop where the brake coil is located is disconnected, and the brake coil is powered off, so that the brake stops working.
In some examples, the two ends of the brake coil may be connected in parallel with a freewheel loop, which may include a freewheel diode and a freewheel resistor connected in series. The first single-pole double-throw relay and the second single-pole double-throw relay are both C-type relays, and when the power of the brake is high, the breaking capacity can be increased by doubling the C-type relays, for example, 2, 4, 8, 16 and the like.
In one embodiment, as shown in fig. 2, the power supply circuit further includes:
a third relay comprising a first normally open contact 210 and a second normally open contact 220; one end of the first normally open contact 210 is connected to the other end of the first coil 110; the other end of the first normally open contact 210 is connected to the normally closed end of the first single pole double throw relay; one end of the second normally open contact 220 is connected to the other end of the second coil 130; the other end of the second normally open contact 220 is connected to the normally closed end of the second single pole double throw relay.
Specifically, when the coil of the third relay is energized, the first normally open contact 210 and the second normally open contact 220 of the third relay are both closed, and the first coil 110 and the second coil 130 are in an energized state. The coil of the third relay may be located in a corresponding control circuit, and may control the coil of the third relay to be powered first, and then control the first switch relay 120 and the second switch relay 140 to be powered, so that a loop where the brake coil is turned on is fully turned on under the condition that the first coil 110 and the second coil 130 are kept on, and the brake coil is powered, so that the brake acts.
Further, the coil of the third relay in the corresponding control circuit can be powered off by controlling the detection power supply loop to be disconnected, so as to further control the coil of the first switching relay 120 and the coil of the second coil 130 of the second relay to be powered off; the first normally open contact 210 of the third relay is reset and the first coil 110 of the first relay is de-energized; the second normally open contact 220 of the third relay is reset and the second coil 130 of the second relay is de-energized; the loop where the brake coil is located is disconnected, and the brake coil is powered off, so that the brake stops working.
In some examples, the first and second normally open contacts 210, 220 of the third relay may be the same normally open contact or may be two different normally open contacts. The first relay, the second relay and the third relay can be all safety relays, and when a normally open contact of the safety relay is closed, the normally closed contact of the safety relay is necessarily opened; when the normally closed contact of the safety relay is closed, the normally open contact of the safety relay is necessarily opened.
In one embodiment, as shown in fig. 2, one end of the normally open contact 230 of the first relay is connected to the other end of the first coil 110; the other end of the normally open contact 230 of the first relay is connected to the stationary end of the first switching relay 120;
one end of the normally open contact 240 of the second relay is connected to the other end of the second coil 130; the other end of the normally open contact 240 of the second relay is connected to the stationary end of the second switching relay 140.
Specifically, in the case where the first coil 110 of the first relay is energized, the normally open contact 230 of the first relay may be closed, thereby causing the first coil 110 to remain energized. In the event that the second coil 130 of the second relay is energized, the normally open contact 240 of the second relay may be closed, thereby causing the second coil 130 to remain energized.
Further, in the event that the first coil 110 of the first relay is de-energized, the normally open contact 230 of the first relay is reset; in the event of a loss of power to the second coil 130 of the second relay, the normally open contact 240 of the second relay is reset.
In one embodiment, as shown in fig. 3, the power supply circuit further includes:
a third switching relay 310, the stationary end of the third switching relay 310 being connected to the stationary end of the first switching relay 120; the movable ends of the third switch relays 310 are respectively used for accessing a brake power supply and detecting a power supply loop; the movable end of the third switching relay 310 is also connected to the other end of the first coil 110 through the normally open contact 230 of the first relay;
a fourth switching relay 320, the stationary end of the fourth switching relay 320 being connected to the stationary end of the second switching relay 140; the movable ends of the fourth switch relays 320 are respectively used for accessing a brake power supply and detecting a power supply loop; the moving end of the fourth switching relay is also connected to the other end of the second coil 130 through the normally open contact 240 of the second relay.
Specifically, the detection power supply loop can be controlled to be turned on, and under the condition that the coil of the first switch relay 120 and the coil of the third switch relay 310 are controlled to be powered on, the first coil 110 of the first relay can be turned on by the first switch relay 120 and the third switch relay 310, wherein the coil of the first switch relay 120 and the coil of the third switch relay 310 can be located in corresponding control circuits; in case of controlling the coils of the second switching relay 140 and the fourth switching relay 320 to be powered, the second switching relay 140, the fourth switching relay 320 may conduct the second coil 130 of the second relay, wherein the coils of the second switching relay 140 and the fourth switching relay 320 may be located at the respective control circuits. In the case where both the first coil 110 and the second coil 130 are turned on, both ends of the brake coil are connected to a brake power source, and a loop in which the brake coil is located is completely turned on, and the brake coil is powered on, so that the brake is turned on.
Further, the coil of the third relay in the corresponding control circuit can be powered off by controlling the detection power supply loop to be disconnected, so as to further control the coil of the first switching relay 120, the coil of the second coil 130 of the second relay, the coil of the third switching relay 310 and the coil of the fourth switching relay 320 to be powered off; the first normally open contact 210 of the third relay is reset, the first coil 110 of the first relay is de-energized, and the normally open contact 230 of the first relay is reset; the second normally open contact 220 of the third relay is reset, the second coil 130 of the second relay is deenergized, and the normally open contact 240 of the second relay is reset; the loop where the brake coil is located is disconnected, and the brake coil is powered off, so that the brake stops working.
In some examples, the third switching relay 310 may include a third single pole double throw relay; the active terminals of the third switching relay 310 may include a normally open terminal of the third single pole double throw relay for accessing a brake power supply (e.g., a brake power supply positive pole pow+); the normally closed end of the third single pole double throw relay may be used to connect a detection power supply loop (e.g., the positive pole of the first detection power supply loop), and the normally closed end of the third single pole double throw relay may also be connected to the other end of the first coil 110 through the normally open contact 230 of the first relay; the stationary terminal of the third switching relay 310 may include a common terminal of the third single pole double throw relay, i.e., the common terminal of the third single pole double throw relay may be connected to the common terminal of the first single pole double throw relay. The normally closed end of the third single pole double throw relay may be connected to the other end of the first coil 110 through the first normally open contact 210; one end of the first coil 110 may be used to connect a detection power supply loop (e.g., a negative pole of the first detection power supply loop); the normally open end of the third single pole double throw relay may be used to connect one end of the brake coil. It should be noted that, the positions of the normal open end of the first single-pole double-throw relay and the common end of the first single-pole double-throw relay may be interchanged, and the positions of the normal open end of the third single-pole double-throw relay and the common end of the third single-pole double-throw relay may be interchanged, so that the same circuit function of the embodiment of the present application may be implemented.
The fourth switching relay 320 may include a fourth single pole double throw relay; the active ends of the fourth switching relay 320 may include a normally open end of the fourth single pole double throw relay, which may be used to access the brake power supply (e.g., brake power supply negative pole POW-), and a normally closed end of the fourth single pole double throw relay; the normally closed end of the fourth single pole double throw relay may be used to access a detection power supply loop (e.g., the positive pole of the second detection power supply loop), and the normally closed end of the fourth single pole double throw relay may also be connected to the other end of the second coil 130 through the normally open contact 240 of the second relay. The stationary terminal of the fourth switching relay 320 may include a common terminal of a fourth single pole double throw relay, i.e., the common terminal of the fourth single pole double throw relay may be connected to the common terminal of the second single pole double throw relay. The normally closed end of the second single pole double throw relay may be connected to the other end of the second coil 130 through a second normally open contact 220; one end of the second coil 130 may be used to access a detection power supply loop (e.g., the negative pole of the second detection power supply loop); the normally open end of the second single pole double throw relay can be used to connect the other end of the brake coil. It should be noted that, the positions of the normal open end of the second single-pole double-throw relay and the common end of the second single-pole double-throw relay may be interchanged, and the positions of the normal open end of the fourth single-pole double-throw relay and the common end of the fourth single-pole double-throw relay may be interchanged, so that the same circuit function of the embodiment of the present application may be implemented.
In some examples, the first single pole double throw relay, the second single pole double throw relay, the third single pole double throw relay, and the fourth single pole double throw relay are all C-type relays, and when the brake power is greater, the breaking capacity can be increased by doubling the C-type relay, e.g., 2, 4, 8, 16, etc.
In one embodiment, as shown in fig. 4, there is provided a control circuit comprising:
one end of the normally open contact 230 of the first relay is used for accessing the power supply of the safety circuit;
one end of the normally open contact 240 of the second relay is connected with the other end of the normally open contact 230 of the first relay;
a first switching relay 120, one end of a coil of the first switching relay 120 is connected to the other end of a normally open contact 240 of the second relay; the other end of the coil of the first switching relay 120 is used for accessing the power supply of the safety loop;
a second switching relay 140, the coil of the second switching relay 140 being connected in parallel with the coil of the first switching relay 120;
the input end of the switching power supply 410 is connected with one end of the normally open contact 230 of the first relay and is also used for connecting a safety loop; the output terminal of the switching power supply 410 is used to turn on the detection power supply loop when the safety loop is turned on.
Specifically, the safety circuit may be turned on, and the switching power supply 410 may turn on the detection power supply circuit (for example, turn on both the first detection power supply circuit and the second detection power supply circuit) when the safety circuit is turned on. Under the condition of controlling and detecting the conduction of a power supply loop, in the corresponding power supply loop, the first coil 110 of the first relay and the second coil 130 of the second relay can be electrified, and then in the control circuit, the normally open contact 230 of the first relay and the normally open contact 240 of the second relay can be closed, so that the coil of the first switch relay 120 and the coil of the second switch relay 140 can be electrified; in the case that the coils of the first switching relay 120 and the second switching relay 140 are both energized, in the corresponding power supply loop, the first switching relay 120 may conduct the first coil 110 of the first relay so that the first coil 110 is kept energized, the second switching relay 140 may conduct the second coil 130 of the second relay so that the second coil 130 is kept energized, and in the control circuit, the coils of the first switching relay 120 and the second switching relay 140 may also both be kept energized so that the power supply loop fully conducts the loop in which the brake coil is located. The safety circuit may be a circuit for controlling the operation state of the brake of the elevator and ensuring the safety of the elevator.
Further, the control circuit may control the detection power circuit to be turned off by controlling the safety circuit to be turned off, so that the coil of the first switching relay 120 and the coil of the second switching relay 140 are both powered off. For the power supply circuit, in the case where the coil of the first switching relay 120 is deenergized, the first coil 110 of the first relay is deenergized; in the case that the coil of the second switching relay 140 is deenergized, the second coil 130 of the second relay is deenergized; the loop where the brake coil is located is disconnected, and the brake coil is powered off, so that the brake stops working.
In some examples, one end of the normally open contact 230 of the first relay may be used to access the positive pole of the power supply of the safety circuit; the other end of the coil of the first switching relay 120 may be used to connect to the negative pole of the power supply of the safety circuit. The switching power supply 410 may include a DC/DC switching power supply (direct current to direct current switching power supply), such as an isolation transformer.
The control circuit of the embodiment of the application comprises: one end of a normally open contact of the first relay is used for being connected with a power supply of a safety loop; one end of the normally open contact of the second relay is connected with the other end of the normally open contact of the first relay; one end of a coil of the first switching relay is connected with the other end of the normally open contact of the second relay; the other end of the coil of the first switching relay is used for being connected with a power supply of a safety loop; the coil of the second switching relay is connected with the coil of the first switching relay in parallel; the input end of the switching power supply is connected with one end of a normally open contact of the first relay and is also used for connecting a safety loop; the output end of the switching power supply is used for conducting the detection power supply loop under the condition that the safety loop is conducted. Through the control circuit, the power supply circuit can be controlled when the safety circuit is switched on, so that the brake coil is powered on, and when the safety circuit is not switched on, the brake coil is powered off, a contactor is not used, an elevator programmable electronic safety system is not used, the circuit elements are few, the structure is simple, the cost is low, the noise of an elevator is effectively reduced, and meanwhile, the running safety and stability are improved.
In one embodiment, as shown in fig. 5, the control circuit further includes:
a third relay including a third coil 510; one end of the third coil 510 sequentially passes through the normally closed contact 520 of the second relay and the normally closed contact 530 of the first relay to be connected with a power supply of the safety circuit; the other end of the third coil 510 is used for connecting with a power supply of a safety loop; one end of the normally closed contact 540 of the third relay is connected with the other end of the normally open contact 240 of the second relay; the other end of the normally closed contact 540 of the third relay is connected to one end of the coil of the first switching relay 120.
Specifically, the power supply of the safety circuit may conduct the circuit where the third coil 510 is located, so that the third coil 510 is powered, and further referring to fig. 2, the first normally open contact 210 and the second normally open contact 220 of the third coil 510 may be both closed; the normally closed contact 540 of the third coil 510 in the control circuit may be opened, and the coil of the first switching relay 120 and the coil of the second switching relay 140 may both be in a power-off state; the safety circuit may be turned on, and thus the switching power supply 410 may turn on the detection power supply circuit (e.g., turn on both the first detection power supply circuit and the second detection power supply circuit) when the safety circuit is turned on. Under the condition that the first normally open contact 210 and the second normally open contact 220 are both closed and the detection power supply loop is conducted, the first coil 110 of the first relay and the second coil 130 of the second relay can be electrified, and then in the control circuit, the normally open contact 230 of the first relay and the normally open contact 240 of the second relay can be both closed, and the normally closed contact 530 of the first relay and the normally closed contact 520 of the second relay can both be opened, so that the third coil 510 is electrified, the normally closed contact 540 of the third relay is closed, and then the coil of the first switch relay 120 and the coil of the second switch relay 140 are electrified; in the case that the coils of the first switching relay 120 and the second switching relay 140 are both energized, in the corresponding power supply loop, the first switching relay 120 may conduct the first coil 110 of the first relay so that the first coil 110 is kept energized, the second switching relay 140 may conduct the second coil 130 of the second relay so that the second coil 130 is kept energized, and in the control circuit, the coils of the first switching relay 120 and the second switching relay 140 may also both be kept energized so that the power supply loop fully conducts the loop in which the brake coil is located.
Further, the control circuit may control the detection power supply circuit to be disconnected by controlling the safety circuit to be disconnected, so that the coil of the third relay, the coil of the first switching relay 120 and the coil of the second switching relay 140 are all powered off. For the power supply circuit, the first normally open contact 210 of the third relay is reset and the first coil 110 of the first relay is de-energized; the second normally open contact 220 of the third relay is reset and the second coil 130 of the second relay is de-energized; the loop where the brake coil is located is disconnected, and the brake coil is powered off, so that the brake stops working.
In one embodiment, one end of the normally open contact 230 of the first relay is used to connect the safety circuit.
Specifically, as shown in fig. 6, the safety circuit may be connected in series with the coil of the first switching relay 120, the coil of the second switching relay 140, and the switching power supply 410, respectively, so that the same circuit functions as in the embodiment of fig. 4 can be realized.
In one embodiment, as shown in fig. 7, the control circuit further includes:
a third switching relay 310, the coil of the third switching relay 310 being connected in parallel with the coil of the first switching relay 120;
the fourth switching relay 320, the coil of the fourth switching relay 320 is connected in parallel with the coil of the first switching relay 120.
Specifically, the safety loop may be turned on, and then the power supply of the safety loop may turn on the loop where the third coil 510 is located, so that the third coil 510 is powered on, and then referring to fig. 3, the first normally open contact 210 and the second normally open contact 220 of the third coil 510 may be both closed; the normally closed contact 540 of the third coil 510 in the control circuit may be opened, and the coil of the first switching relay 120 and the coil of the second switching relay 140 may both be in a power-off state; the switching power supply 410 may turn on the detection power supply loop (e.g., turn on both the first detection power supply loop and the second detection power supply loop) when the safety loop is turned on. Under the condition that the first normally open contact 210 and the second normally open contact 220 are both closed and the conduction of a power supply loop is detected, the first coil 110 of the first relay and the second coil 130 of the second relay can be electrified, and then in a control circuit, the normally open contact 230 of the first relay and the normally open contact 240 of the second relay can be both closed, and the normally closed contact 530 of the first relay and the normally closed contact 520 of the second relay can be both opened, so that the third coil 510 is deenergized, the normally closed contact 540 of the third relay is closed, and then the coil of the first switch relay 120, the coil of the second switch relay 140, the coil of the third switch relay 310 and the coil of the fourth switch relay 320 are electrified; in the case where the coil of the first switching relay 120, the coil of the second switching relay 140, the coil of the third switching relay 310, and the coil of the fourth switching relay 320 are all powered, the first coil 110 of the first relay and the second coil 130 of the second relay in the corresponding power supply loops may be both maintained in a powered state, and further in the control circuit, the coil of the first switching relay 120 and the coil of the second switching relay 140 may also both be maintained in a powered state, so that the power supply loops fully conduct the loops in which the brake coils are located.
Further, the control circuit may control the detection power supply circuit to be turned off by controlling the safety circuit to be turned off, so that the coil of the third relay, the coil of the first switching relay 120, the coil of the second coil 130 of the second relay, the coil of the third switching relay 310 and the coil of the fourth switching relay 320 are all powered off; for the power supply circuit, the first normally open contact 210 of the third relay is reset, the first coil 110 of the first relay is deenergized, and the normally open contact 230 of the first relay is reset; the second normally open contact 220 of the third relay is reset, the second coil 130 of the second relay is deenergized, and the normally open contact 240 of the second relay is reset; the loop where the brake coil is located is disconnected, and the brake coil is powered off, so that the brake stops working.
In one embodiment, an elevator is provided that includes a detection power loop, a safety loop, and a brake; the brake comprises a brake coil and a brake power supply; the elevator further comprises:
a first relay including a first coil 110; one end of the first coil 110 is connected to a detection power supply loop; one end of the normally open contact 230 of the first relay is connected to the power supply of the safety circuit;
The first switch relay 120, the moving end of the first switch relay 120 is connected with the other end of the first coil 110, and is also connected with one end of the brake coil; the stationary end of the first switching relay 120 is connected to the detection power supply loop and the brake power supply respectively; the first switching relay 120 turns on the first coil 110; one end of the coil of the first switching relay 120 is connected to the power supply of the safety circuit;
a second relay including a second coil 130; one end of the second coil 130 is connected to the detection power supply loop; one end of the normally open contact 240 of the second relay is connected to the other end of the normally open contact 230 of the first relay; the other end of the normally open contact 240 of the second relay is connected to the other end of the coil of the first switching relay 120;
the moving end of the second switch relay 140 is connected with the other end of the second coil 130 and is also connected with a brake power supply; the stationary end of the second switching relay 140 is connected to the detection power supply loop and is also connected to the other end of the brake coil; the coil of the second switching relay 140 is connected in parallel with the coil of the first switching relay 120;
the input end of the switching power supply 410 is connected with one end of the normally open contact 230 of the first relay and is also connected with a safety loop; the output of the switching power supply 410 turns on the detection power supply loop in the case that the safety loop is turned on.
In particular, the course of action of the relays in the elevator can be combined with the embodiments described above in relation to the supply circuit and the control circuit, which are not described in detail here. Wherein the brake coil may be an electromagnetic brake coil.
In some examples, for a failure of the first single pole double throw relay, for example: (1) short circuit fault at normally open end side of first single pole double throw relay: before the brake is started, after the safety circuit is switched on, the third coil 510 of the third relay is powered on, the normally open contact (comprising the first normally open contact 210 and the second normally open contact 220) of the third relay is switched on, the first coil 110 of the first relay cannot be powered on, the normally open contact 230 of the first relay cannot be closed, the coil of the second single-pole double-throw relay cannot be powered on, the power supply circuit where the brake coil is located cannot be switched on, and the brake cannot be started. (2) Open fault at normally open end side of first single pole double throw relay: the power supply circuit in which the brake coil is located cannot be turned on and the brake cannot be turned on.
In some examples, for failure of the second single pole double throw relay, for example: (1) short circuit fault at normally open end side of second single pole double throw relay: before the brake is started, after the safety circuit is switched on, the third coil 510 of the third relay is electrified, the normally open contact of the third relay is switched on, but the second coil 130 of the second relay, and therefore the normally open contact 240 of the second relay, cannot be closed, the coil of the first single pole double throw relay cannot be electrified, the power supply circuit where the coil of the brake is located cannot be switched on, and the brake cannot be started. (2) Open fault at normally open end side of second single pole double throw relay: the power supply circuit in which the brake coil is located cannot be turned on and the brake cannot be turned on.
In some examples, for a failure of the normally open contact 230 of the first relay (with the normally open contact 240 of the second relay), for example: (1) short circuit fault (corresponding to open of its normally closed contacts): at this time, the normally closed contact is opened, the third coil 510 of the third relay cannot be powered all the time, the normally open contact of the third relay cannot be closed, the second coil 130 of the second relay cannot be powered, the normally open contact 240 of the second relay cannot be closed, the coil of the first single-pole double-throw relay and the coil of the second single-pole double-throw relay cannot be powered, the power supply loop where the brake coil is located cannot be connected, and the brake cannot be opened; (2) open circuit fault (corresponding to its normally closed contact shorting): the coil of the first single-pole double-throw relay and the coil of the second single-pole double-throw relay cannot be powered, a power supply loop where the coil of the brake is located cannot be connected, and the brake cannot be opened.
In some examples, for a failure of the normally open contacts of the third relay (including the first normally open contact 210 and the second normally open contact 220), for example: (1) short circuit fault (corresponding to open of its normally closed contacts): the normally closed contact of the third relay is disconnected, the coil of the first single-pole double-throw relay and the coil of the second single-pole double-throw relay cannot be powered, the power supply loop where the coil of the brake is located cannot be connected, and the brake cannot be started; (2) open circuit fault (corresponding to its normally closed contact shorting): before the brake is started, the first coil 110 of the first relay and the second coil 130 of the second relay cannot be powered on, the normally open contact 230 of the first relay and the normally open contact 240 of the second relay cannot be closed, the coil of the first single-pole double-throw relay and the coil of the second single-pole double-throw relay cannot be powered on, the power supply loop where the coil of the brake is located cannot be connected, and the brake cannot be started.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A power supply circuit, the power supply circuit comprising:
a first relay including a first coil; one end of the first coil is used for being connected with a detection power supply loop;
the movable end of the first switch relay is connected with the other end of the first coil and is also used for being connected with one end of a brake coil; the fixed end of the first switch relay is used for being connected with a detection power supply loop and a brake power supply respectively; the first switch relay is used for conducting the first coil;
A second relay including a second coil; one end of the second coil is used for being connected with the detection power supply loop;
the movable end of the second switch relay is connected with the other end of the second coil and is also used for being connected with the brake power supply; the stationary end of the second switch relay is used for being connected with the detection power supply loop and is also connected with the other end of the brake coil.
2. The power supply circuit of claim 1, wherein the first switching relay comprises a first single pole double throw relay; the normally open end of the first single-pole double-throw relay is used for being connected with one end of the brake coil; the normally closed end of the first single-pole double-throw relay is connected with the other end of the first coil;
the second switching relay comprises a second single-pole double-throw relay; the normally open end of the second single-pole double-throw relay is used for being connected with the power supply of the brake; and the normally closed end of the second single-pole double-throw relay is connected with the other end of the second coil.
3. The power supply circuit of claim 2, wherein the power supply circuit further comprises:
the third relay comprises a first normally open contact and a second normally open contact; one end of the first normally open contact is connected with the other end of the first coil; the other end of the first normally open contact is connected with the normally closed end of the first single-pole double-throw relay; one end of the second normally open contact is connected with the other end of the second coil; the other end of the second normally open contact is connected with the normally closed end of the second single-pole double-throw relay.
4. The power supply circuit of claim 1, wherein one end of a normally open contact of the first relay is connected to the other end of the first coil; the other end of the normally open contact of the first relay is connected with the stationary end of the first switch relay;
one end of a normally open contact of the second relay is connected with the other end of the second coil; and the other end of the normally open contact of the second relay is connected with the stationary end of the second switch relay.
5. The power supply circuit of claim 4, wherein the power supply circuit further comprises:
the fixed end of the third switching relay is connected with the fixed end of the first switching relay; the movable end of the third switching relay is respectively used for being connected with the brake power supply and the detection power supply loop; the movable end of the third switching relay is also connected with the other end of the first coil through a normally open contact of the first relay;
the fixed end of the fourth switching relay is connected with the fixed end of the second switching relay; the movable end of the fourth switch relay is respectively used for being connected with the brake power supply and the detection power supply loop; and the movable end of the fourth switching relay is also connected with the other end of the second coil through a normally open contact of the second relay.
6. A control circuit, the control circuit comprising:
one end of a normally open contact of the first relay is used for being connected with a power supply of a safety loop;
one end of a normally open contact of the second relay is connected with the other end of the normally open contact of the first relay;
one end of a coil of the first switching relay is connected with the other end of the normally open contact of the second relay; the other end of the coil of the first switching relay is used for being connected with a power supply of the safety loop;
a second switching relay, the coil of which is connected in parallel with the coil of the first switching relay;
the input end of the switching power supply is connected with one end of a normally open contact of the first relay and is also used for being connected with the safety loop; the output end of the switching power supply is used for conducting the detection power supply loop under the condition that the safety loop is conducted.
7. The control circuit of claim 6, wherein the control circuit further comprises:
a third relay including a third coil; one end of the third coil is connected with a power supply of the safety loop through a normally closed contact of the second relay and a normally closed contact of the first relay in sequence; the other end of the third coil is used for being connected with a power supply of the safety loop; one end of the normally closed contact of the third relay is connected with the other end of the normally open contact of the second relay; and the other end of the normally closed contact of the third relay is connected with one end of the coil of the first switching relay.
8. The control circuit of claim 6, wherein one end of a normally open contact of the first relay is used to connect the safety circuit.
9. The control circuit of claim 6, wherein the control circuit further comprises:
a third switching relay, the coil of which is connected in parallel with the coil of the first switching relay;
and the coil of the fourth switching relay is connected with the coil of the first switching relay in parallel.
10. An elevator, characterized in that the elevator comprises a detection power circuit, a safety circuit and a brake; the brake comprises a brake coil and a brake power supply; the elevator further comprises:
a first relay including a first coil; one end of the first coil is connected to the detection power supply loop; one end of a normally open contact of the first relay is connected with a power supply of the safety loop;
the movable end of the first switch relay is connected with the other end of the first coil and is also connected with one end of the brake coil; the fixed end of the first switch relay is respectively connected with the detection power supply loop and the brake power supply; the first switching relay turns on the first coil; one end of the coil of the first switching relay is connected with a power supply of the safety loop;
A second relay including a second coil; one end of the second coil is connected to the detection power supply loop; one end of the normally open contact of the second relay is connected with the other end of the normally open contact of the first relay; the other end of the normally open contact of the second relay is connected with the other end of the coil of the first switch relay;
the movable end of the second switch relay is connected with the other end of the second coil and is also connected with the brake power supply; the fixed end of the second switch relay is connected to the detection power supply loop and is also connected with the other end of the brake coil; the coil of the second switching relay is connected with the coil of the first switching relay in parallel;
the input end of the switching power supply is connected with one end of a normally open contact of the first relay and is also connected with the safety loop; and the output end of the switching power supply is used for conducting the detection power supply loop under the condition that the safety loop is conducted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310797028.1A CN116812689A (en) | 2023-06-29 | 2023-06-29 | Power supply circuit, control circuit and elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310797028.1A CN116812689A (en) | 2023-06-29 | 2023-06-29 | Power supply circuit, control circuit and elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116812689A true CN116812689A (en) | 2023-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310797028.1A Pending CN116812689A (en) | 2023-06-29 | 2023-06-29 | Power supply circuit, control circuit and elevator |
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| Country | Link |
|---|---|
| CN (1) | CN116812689A (en) |
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2023
- 2023-06-29 CN CN202310797028.1A patent/CN116812689A/en active Pending
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