CN104734120A - Protection and fault detection system and method for fan motor - Google Patents
Protection and fault detection system and method for fan motor Download PDFInfo
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- CN104734120A CN104734120A CN201510107588.5A CN201510107588A CN104734120A CN 104734120 A CN104734120 A CN 104734120A CN 201510107588 A CN201510107588 A CN 201510107588A CN 104734120 A CN104734120 A CN 104734120A
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Abstract
The invention discloses a protection and fault detection system and method for a fan motor. When overtemperature occurs on the fan motor in the running process of the fan motor, a temperature protection switch acts, an action signal is transmitted to a controller, a contactor control coil acts, a main contact is disconnected, and the fan motor is stopped. The one-time action signals of the temperature protection switch are sent to a counter of the controller to be counted, and the action times of the temperature protection switch are counted. When the fan motor is stopped for a certain time, the temperature protection switch recovers to be normal, temperature protection switch recovery signals are transmitted to the controller, the contactor control coil acts, the main contact is closed, and the fan motor runs. When the counter counts that the accumulated actions of the temperature protection switch are reached to the preset action times, the fan motor is stopped, and a contactor keeps in a disconnected state. According to the protection and fault detection system and method for the fan motor, the overtemperature of the fan motor can be detected in time, motor fixed stop and burning loss caused by the overtemperature of the fan motor can be avoided, and fire hazards caused by the burning loss of the fan motor can be eliminated fundamentally.
Description
Technical field
The present invention relates to protection and failure detector circuit, especially relate to a kind of be applied to field of track traffic blower motor protection and fault detection system and method.
Background technology
Blower fan, as a kind of vitals of field of track traffic, plays the important and pivotal role in the ventilation and heat of field of track traffic convertor assembly and the toxic emission in compartment and fresh-air ventilation.As shown in Figure 1, the blower motor 3 of existing field of track traffic is powered by subordinate inverter 1 usually, and carries out control and protection by circuit breaker 5.
This blower motor control protection electric circuit advantage of the prior art is: circuit structure is simple, can effectively protect the fault such as overcurrent, short circuit of blower motor.But for the motor burning that blower motor causes due to stator winding overtemperature, and the fault such as dead but can not detect effectively, is difficult to protect in time simultaneously.
Summary of the invention
In view of this; a kind of blower motor is the object of the present invention is to provide to protect and fault detection system and method; blower motor overtemperature fault can be detected in time; timely protection blower motor; avoid the phenomenon of the dead and scaling loss of the motor that causes due to blower motor overtemperature fault, thus fundamentally eliminate the disaster hidden-trouble caused because of blower motor scaling loss.
In order to realize foregoing invention object; the present invention specifically provides the technic relization scheme of the protection of a kind of blower motor and fault detection system; blower motor protection and fault detection system; comprise: control switch, blower motor and controller; be provided with temperature protection switch in the stator winding of described blower motor, in described controller, be provided with counter.When there is blower motor overtemperature in described blower motor running; described temperature protection switch action; control the control coil action of described control switch; and then the main contact controlling described control switch disconnects; described blower motor is shut down; the one-off signal of described temperature protection switch is sent in described controller and is counted simultaneously, and the action frequency of the counter in described controller to described temperature protection switch is added up.When described blower motor shuts down certain hour, described temperature protection switch recovers normally, and described temperature protection switch controls the control coil action of described control switch, and then the main contact controlling described control switch closes, and described blower motor runs.When the counters count in described controller reaches the action frequency of setting to the accumulative action of described temperature protection switch; described controller sends described control switch control coil actuating signal; and then the main contact controlling described control switch disconnects; described blower motor is shut down; control described control switch after now no longer being recovered by described temperature protection switch to close, described control switch remains on off-state always.
The present invention also specifically provides the technic relization scheme of the protection of another kind of blower motor and fault detection system; blower motor protection and fault detection system; comprise: control switch, blower motor and controller; be provided with temperature protection switch in the stator winding of described blower motor, in described controller, be provided with counter.When there is blower motor overtemperature in described blower motor running; described temperature protection switch action; described temperature protection switch actuating signal transfers to described controller; the control coil action of described control switch is controlled by described controller; and then the main contact controlling described control switch disconnects; described blower motor is shut down; the one-off signal of described temperature protection switch is sent in described controller and is counted simultaneously, and the action frequency of the counter in described controller to described temperature protection switch is added up.When described blower motor shuts down certain hour; described temperature protection switch recovers normally; described temperature protection switch restoring signal transfers to described controller; the control coil action of described control switch is controlled by described controller; and then the main contact controlling described control switch closes, described blower motor runs.When the counters count in described controller reaches the action frequency of setting to the accumulative action frequency of described temperature protection switch; described controller sends described control switch control coil actuating signal; and then the main contact controlling described control switch disconnects; described blower motor is shut down; now described controller no longer receives described temperature protection switch restoring signal, and described control switch remains on off-state always.
The present invention also specifically provides the technic relization scheme of the protection of the third blower motor and fault detection system; blower motor protection and fault detection system; comprise: control switch, blower motor and controller; be provided with temperature sensor in the stator winding of described blower motor, in described controller, be provided with timer sum counter.In described blower motor running, the temperature of stator winding described in described temperature sensor on-line monitoring, is sent to described controller by temperature monitoring signal simultaneously and processes.The temperature monitoring signal of described controller to described temperature sensor carries out record, and described controller judges the threshold value whether described temperature monitoring signal exceedes setting.When the stator winding generation overtemperature fault of described blower motor; described controller judges that the temperature monitoring signal of described temperature sensor exceedes the threshold value of setting; described controller controls the control coil action of described control switch; and then the main contact controlling described control switch disconnects, described blower motor is shut down.The overtemperature number of stoppages of counter in described controller to described stator winding counts; timer in described controller is simultaneously to carrying out timing the downtime of described blower motor; when described blower motor shuts down certain hour; reach the overtemperature recovery time set in described controller; the control coil action of described control switch is controlled by described controller; and then the main contact controlling described control switch closes, described blower motor runs.When the counters count in described controller reaches the number of stoppages of setting to the accumulative overtemperature number of stoppages of described electronics winding; described controller sends described control switch control coil actuating signal; and then the main contact controlling described control switch disconnects; described blower motor is shut down; now described controller no longer closes carrying out timing the downtime of described blower motor and controlling described control switch, and described control switch remains on off-state always.
Preferably, described control switch comprises contactor and the circuit breaker of series connection mutually, and described control coil and main contact are arranged in described contactor.When described circuit breaker occurs overcurrent, short trouble for described blower motor, disconnect described blower motor.
Preferably, described control switch comprises circuit breaker, and adopts the structure installing shunt release on described circuit breaker additional, and described controller carries out breaking operation by controlling described shunt release to described circuit breaker.
Preferably, described system also comprises subordinate inverter, and described controller adopts motion control unit, described subordinate inverter by described control switch for described blower motor provides power supply.
Preferably, described system also comprises display, and when described blower motor is shut down, described control switch remains on off-state always, and blower motor overtemperature failure alarm signal is transmitted through the network to described display.
The present invention also specifically provides the technic relization scheme of the protection of a kind of blower motor and fault detection method in addition, and blower motor protection and fault detection method, comprise the following steps:
S101: when blower motor overtemperature occurs blower motor in running, temperature protection switch action in described blower motor stator winding, the control coil action of control contactor, and then the main contact controlling described contactor disconnects, described blower motor is shut down, the one-off signal of described temperature protection switch is sent in described controller and is counted simultaneously, and the action frequency of the counter in described controller to described temperature protection switch is added up;
S102: when described blower motor shuts down certain hour, described temperature protection switch recovers normally, and described temperature protection switch controls the control coil action of described contactor, and then the main contact controlling described contactor closes, and described blower motor runs;
S103: when described counters count to accumulative action frequency reach the action frequency of setting time; described controller sends described contactor control coil actuating signal; and then the main contact controlling described contactor disconnects; described blower motor is shut down; control described contactor after now no longer being recovered by described temperature protection switch to close, described contactor remains on off-state always.
The present invention also specifically provides the technic relization scheme of the protection of another kind of blower motor and fault detection method, and blower motor protection and fault detection method, comprise the following steps:
S201: when blower motor overtemperature occurs blower motor in running, temperature protection switch action in described blower motor stator winding, described temperature protection switch actuating signal transfers to controller, the control coil action of described contactor is controlled by described controller, and then the main contact controlling described contactor disconnects, described blower motor is shut down, the one-off signal of described temperature protection switch is sent in described controller and is counted simultaneously, and the action frequency of the counter in described controller to described temperature protection switch is added up;
S202: when described blower motor shuts down certain hour, described temperature protection switch recovers normally, described temperature protection switch restoring signal transfers to described controller, the control coil action of described contactor is controlled by described controller, and then the main contact controlling described contactor closes, described blower motor runs;
S203: when the counters count in described controller reaches the action frequency of setting to the accumulative action frequency of described temperature protection switch; described controller sends described contactor control coil actuating signal; and then the main contact controlling described contactor disconnects; described blower motor is shut down; now described controller no longer receives described temperature protection switch restoring signal, and described contactor remains on off-state always.
The present invention also specifically provides the technic relization scheme of the protection of the third blower motor and fault detection method, and blower motor protection and fault detection method, comprise the following steps:
S301: in blower motor running, described in the temperature sensor on-line monitoring in described blower motor stator winding, the temperature of stator winding, is sent to controller by temperature monitoring signal simultaneously and processes;
S302: the temperature monitoring signal of described controller to described temperature sensor carries out record, described controller judges the threshold value whether described temperature monitoring signal exceedes setting, when there is described blower motor stator winding overtemperature fault, described controller judges that the temperature monitoring signal of described temperature sensor exceedes the threshold value of setting, the control coil action of described controller control contactor, and then the main contact controlling described contactor disconnects, described blower motor is shut down;
S303: the overtemperature number of stoppages of the counter in described controller to described stator winding counts, timer in described controller is simultaneously to carrying out timing the downtime of described blower motor, when described blower motor shuts down certain hour, reach the overtemperature recovery time set in described controller, the control coil action of described contactor is controlled by described controller, and then the main contact controlling described contactor closes, described blower motor runs;
S304: when the counters count in described controller reaches the number of stoppages of setting to the accumulative overtemperature number of stoppages of described stator winding; described controller sends described contactor control coil actuating signal; and then the main contact controlling described contactor disconnects; described blower motor is shut down; now described controller no longer closes carrying out timing the downtime of described blower motor and controlling described contactor, and described contactor remains on off-state always.
Preferably, described method also comprises: when overcurrent, short trouble appear in described blower motor, disconnected the process of described blower motor by circuit breaker.
Preferably, described method also comprises: when described blower motor is shut down, when described control switch remains on off-state always, blower motor overtemperature failure alarm signal is transmitted through the network to the process of display simultaneously.
By implementing blower motor protection that the invention described above provides and fault detection system and method, there is following beneficial effect:
The present invention can carry out overtemperature prote to blower motor in time, and and fault blower motor is detected, prevent blower motor fault from expanding and scaling loss further, thus eliminate the disaster hidden-trouble that causes because of blower motor scaling loss.Also can carry out available protecting in faults such as blower motor overcurrent, short circuits simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.Apparently, the accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also obtain other embodiment according to these accompanying drawings.
Fig. 1 is the connecting structure for electrical equipment schematic diagram of prior art blower motor Control protection system;
Fig. 2 is the connecting structure for electrical equipment schematic diagram of blower motor of the present invention protection and a kind of embodiment of fault detection system;
Fig. 3 is the blower motor protection of the embodiment of the present invention 1 and the syndeton schematic diagram of fault detection system;
Fig. 4 is the blower motor protection of the embodiment of the present invention 1 and the control principle block diagram of fault detection system;
Fig. 5 is the blower motor protection of the embodiment of the present invention 2 and the syndeton schematic diagram of fault detection system;
Fig. 6 is the blower motor protection of the embodiment of the present invention 2 and the control principle block diagram of fault detection system;
Fig. 7 is the blower motor protection of the embodiment of the present invention 3 and the syndeton schematic diagram of fault detection system;
Fig. 8 is the blower motor protection of the embodiment of the present invention 3 and the control principle block diagram of fault detection system;
In figure: 1-subordinate inverter, 2-control switch, 3-blower motor, 4-contactor, 5-circuit breaker, 6-controller, 7-display.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention.Obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in accompanying drawing 2 to accompanying drawing 8, give the specific embodiment of blower motor of the present invention protection and fault detection system and method, below in conjunction with the drawings and specific embodiments, the invention will be further described.
The specific embodiment of the invention propose multiple be applied particularly to field of track traffic blower motor protection and fault detection system and method; by adding temperature protection switch or temperature sensor in blower motor stator winding; three-phase contactor is accessed, in order to control the closed and disconnected of blower motor in blower motor power supply circuits.Meanwhile, by adding circuit breaker in circuit further, disconnecting blower motor when overcurrent, short trouble appear in blower motor and playing a protective role.The blower motor protection that the specific embodiment of the invention describes and fault detection system and method can detect blower motor overtemperature fault in time; overtemperature prote is carried out to blower motor; and in time the blower motor of fault is positioned; prevent blower motor overtemperature fault from expanding further and cause the dead and scaling loss of motor; and then fundamentally eliminate the disaster hidden-trouble caused because of blower motor scaling loss, drastically increase the safety and reliability of rail traffic vehicles operation.
As shown in Figure 2; a kind of protection of blower motor and the specific embodiment of fault detection system; comprise: contactor 4, circuit breaker 5, imbed the blower motor 3 of temperature protection switch or temperature sensor, and not shown in Figure 2 as the motion control unit of controller 6, display 7(controller 6 and display 7 two parts).By adding temperature protection switch or temperature sensor in the stator winding of blower motor 3, in the power supply circuits of blower motor 3, access three-phase contactor (i.e. contactor 4), in order to control access and the disconnection of blower motor 3.The specific embodiment of the invention utilizes motion control unit to carry out adding up and judge to the overtemperature of blower motor 3, and overtemperature alarm signal is sent to display 7 by network and carries out fan trouble display and maintain and replace judges and point out to possess fault diagnosis functions.Meanwhile, the circuit breaker 5 in circuit can disconnect blower motor 3 when the fault such as overcurrent, short circuit appears in blower motor 3, thus plays further protective effect.Controller 6 is except adopting motion control unit (DCU in a particular embodiment, Drive Control Unit), PLC(Programmable Logic Controller can also be adopted, plc), the intelligent logical control device such as microcomputer or intelligent controller replaces.Display 7 also can adopt and integrate with above-mentioned intelligent logical control device (controller 6), is carried out the display of blower motor fault alarm and temperature by the pattern of other transfer of data.The position of contactor in accompanying drawing 24 with circuit breaker 5 is exchanged; Or cancel contactor 4, circuit breaker 5 installs shunt release additional, controls release by motion control unit and protect blower motor 3, adopt identical virtual protection and control principle, also can play the effect identical with specific embodiment shown in accompanying drawing 2.
Embodiment 1:
As shown in accompanying drawing 3 and accompanying drawing 4, blower motor protection and fault detection system, comprising: control switch 2, blower motor 3 and controller 6.Be provided with temperature protection switch in the stator winding of blower motor 3, in controller 6, be provided with counter or accumulator.When there is blower motor overtemperature in blower motor 3 running; temperature protection switch action; control the control coil action of control switch 2; and then the main contact controlling control switch 2 disconnects; blower motor 3 is shut down; the one-off signal of simultaneous temperature protection switch is sent in controller 6 and is counted, and the counter in controller 6 or the action frequency of accumulator to temperature protection switch are added up.When blower motor 3 shuts down certain hour, temperature protection switch recovers normally, and temperature protection switch controls the control coil action of control switch 2, and then the main contact controlling control switch 2 closes, and blower motor 3 runs.When the accumulative action frequency that the counter in controller 6 or accumulator count on temperature protection switch reaches action frequency (as: more than 2 times) of setting; controller 6 sends control switch 2 control coil actuating signal; thus the main contact controlling control switch 2 disconnects; blower motor 3 is shut down; control control switch 2 after now no longer being recovered by temperature protection switch to close, control switch 2 remains on off-state always.
Embodiment 2:
As shown in accompanying drawing 5 and accompanying drawing 6, blower motor protection and fault detection system, comprising: control switch 2, blower motor 3 and controller 6.Be provided with temperature protection switch in the stator winding of blower motor 3, in controller 6, be provided with counter or accumulator.When there is blower motor overtemperature in blower motor 3 running; temperature protection switch action, temperature protection switch actuating signal transfers to controller 6, is controlled the control coil action of control switch 2 by controller 6; and then the main contact controlling control switch 2 disconnects, blower motor 3 is shut down.The one-off signal of simultaneous temperature protection switch is sent in controller 6 and is counted, and the counter in controller 6 or the action frequency of accumulator to temperature protection switch are added up.When blower motor 3 shuts down certain hour; temperature protection switch recovers normally, and temperature protection switch restoring signal transfers to controller 6, is controlled the control coil action of control switch 2 by controller 6; and then the main contact controlling control switch 2 closes, blower motor 3 runs.When the accumulative action that the counter in controller 6 or accumulator count on temperature protection switch reaches action frequency (as: more than 2 times) of setting; controller 6 sends control switch 2 control coil actuating signal; thus the main contact controlling control switch 2 disconnects; blower motor 3 is shut down; this Time Controller 6 no longer receives temperature protection switch restoring signal, and control switch 2 remains on off-state always.
Embodiment 3:
As shown in accompanying drawing 7 and accompanying drawing 8, blower motor protection and fault detection system, comprising: control switch 2, blower motor 3 and controller 6.Be provided with temperature sensor in the stator winding of blower motor 3, be provided with timer or accumulator in controller 6, and be provided with counter further.In blower motor 3 running, the temperature of temperature sensor on-line monitoring stator winding, is sent to controller 6 by temperature monitoring signal simultaneously and processes.The temperature monitoring signal of controller 6 pairs of temperature sensors carries out record, and this temperature monitoring signal is sent to display 7 by train network shows, so that on-line monitoring show the operating temperature of blower motor 3.Controller 6 also judges the threshold value whether temperature monitoring signal exceedes setting; when the stator winding generation overtemperature fault of blower motor 3; controller 6 judges that the temperature monitoring signal of temperature sensor exceedes the threshold value of setting; controller 6 controls the control coil action of control switch 2; and then the main contact controlling control switch 2 disconnects, blower motor 3 is shut down.Counter in controller 6 or the overtemperature number of stoppages of accumulator to stator winding count, and the timer in controller 6 is simultaneously to carrying out timing the downtime of blower motor 3.When blower motor 3 shuts down certain hour, reach the overtemperature recovery time of setting in controller 6, controlled the control coil action of control switch 2 by controller 6, and then the main contact controlling control switch 2 closes, blower motor 3 runs.When the accumulative overtemperature number of stoppages that the counter in controller 6 or accumulator count on stator winding reaches the number of stoppages (as: more than 2 times) of setting; controller 6 sends control switch 2 control coil actuating signal; and then the main contact controlling control switch 2 disconnects, blower motor 3 is shut down.This Time Controller 6 no longer closes carrying out timing the downtime of blower motor 3 and controlling control switch 2, and control switch 2 remains on off-state always.
Embodiment 4:
On the basis of previous embodiment 1-3, control switch 2 comprises contactor 4 and the circuit breaker 5 of series connection mutually further, and control coil and main contact are arranged in contactor 4.When circuit breaker 5 occurs overcurrent, short trouble for blower motor 3, disconnect blower motor 3.As another kind of specific embodiment of the present invention, on the basis of previous embodiment 1-3, control switch 2 can also comprise circuit breaker 5, and adopts the structure installing shunt release on circuit breaker 5 additional, and controller 6 carries out breaking operation by controlling shunt release to circuit breaker 5.
Embodiment 5:
On the basis of previous embodiment 1-4; system also comprises display 7 further, and when blower motor 3 is shut down, control switch 2 remains on off-state always; and blower motor overtemperature failure alarm signal is transmitted through the network to display 7, the corresponding blower motor 3 of alert waits until replacing.System also comprises subordinate inverter 1 further, and controller 6 adopts motion control unit, subordinate inverter 1 by control switch 2 for blower motor 3 provides power supply.
Embodiment 6:
Blower motor protection and fault detection method, comprise the following steps:
S101: when blower motor overtemperature occurs blower motor 3 in running, temperature protection switch action in blower motor 3 stator winding, the control coil action of control contactor 4, and then the main contact of control contactor 4 disconnects, blower motor 3 is shut down, the one-off signal of simultaneous temperature protection switch is sent in controller 6 and is counted, and the counter in controller 6 or the action frequency of accumulator to temperature protection switch are added up;
S102: when blower motor 3 shuts down certain hour, temperature protection switch recovers normally, the control coil action of temperature protection switch control contactor 4, and then the main contact of control contactor 4 closes, and blower motor 3 runs;
S103: when the accumulative action frequency that counter or accumulator count on reaches the action frequency of setting; controller 6 sends contactor 4 control coil actuating signal; and then the main contact of control contactor 4 disconnects; blower motor 3 is shut down; after now no longer being recovered by temperature protection switch, control contactor 4 closes, and contactor 4 remains on off-state always.
Embodiment 7:
Blower motor protection and fault detection method, comprise the following steps:
S201: when blower motor overtemperature occurs blower motor 3 in running, temperature protection switch action in blower motor 3 stator winding, temperature protection switch actuating signal transfers to controller 6, by the control coil action of controller 6 control contactor 4, and then the main contact of control contactor 4 disconnects, blower motor 3 is shut down, the one-off signal of simultaneous temperature protection switch is sent in controller 6 and is counted, and the counter in controller 6 or the action frequency of accumulator to temperature protection switch are added up;
S202: when blower motor 3 shuts down certain hour, temperature protection switch recovers normally, and temperature protection switch restoring signal transfers to controller 6, by the control coil action of controller 6 control contactor 4, and then the main contact of control contactor 4 closes, blower motor 3 runs;
S203: when the accumulative action frequency that the counter in controller 6 or accumulator count on temperature protection switch reaches the action frequency of setting; controller 6 sends contactor 4 control coil actuating signal; and then the main contact of control contactor 4 disconnects; blower motor 3 is shut down; this Time Controller 6 no longer receives temperature protection switch restoring signal, and contactor 4 remains on off-state always.
Embodiment 8:
Blower motor protection and fault detection method, comprise the following steps:
S301: in blower motor 3 running, the temperature of the temperature sensor on-line monitoring stator winding in blower motor 3 stator winding, is sent to controller 6 by temperature monitoring signal simultaneously and processes;
S302: the temperature monitoring signal of controller 6 pairs of temperature sensors carries out record, the threshold value whether controller 6 pairs of temperature monitoring signals exceed setting judges, when there is blower motor 3 stator winding overtemperature fault, controller 6 judges that the temperature monitoring signal of temperature sensor exceedes the threshold value of setting, the control coil action of controller 6 control contactor 4, and then the main contact of control contactor 4 disconnects, blower motor 3 is shut down;
S303: the counter in controller 6 or the overtemperature number of stoppages of accumulator to stator winding count, timer in controller 6 is simultaneously to carrying out timing the downtime of blower motor 3, when blower motor 3 shuts down certain hour, reach the overtemperature recovery time of setting in controller 6, by the control coil action of controller 6 control contactor 4, and then the main contact of control contactor 4 closes, blower motor 3 runs;
S304: when the accumulative overtemperature number of stoppages that the counter in controller 6 or accumulator count on stator winding reaches the number of stoppages of setting; controller 6 sends contactor 4 control coil actuating signal; and then the main contact of control contactor 4 disconnects; blower motor 3 is shut down; this Time Controller 6 is no longer to carrying out timing the downtime of blower motor 3 and control contactor 4 closes, and contactor 4 remains on off-state always.
Embodiment 9:
Blower motor protection and fault detection method also comprise: when overcurrent, short trouble appear in blower motor 3, disconnected the process of blower motor 3 by circuit breaker 5.
Embodiment 10:
When blower motor 3 is shut down, when control switch 2 remains on off-state always, blower motor overtemperature failure alarm signal is transmitted through the network to the process of display 7 simultaneously.
By implementing blower motor protection that the specific embodiment of the invention describes and fault detection system and method, following technique effect can be reached:
The present invention can carry out overtemperature prote to blower motor in time, and and fault blower motor is detected, prevent blower motor fault from expanding and scaling loss further, thus eliminate the disaster hidden-trouble that causes because of blower motor scaling loss.Also can carry out available protecting in faults such as blower motor overcurrent, short circuits simultaneously.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to the present invention.Although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention.Any those of ordinary skill in the art, when not departing from Spirit Essence of the present invention and technical scheme, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent replacement, equivalence change and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (12)
1. a blower motor protection and fault detection system, it is characterized in that, comprise: control switch (2), blower motor (3) and controller (6), be provided with temperature protection switch in the stator winding of described blower motor (3), and described controller is provided with counter in (6); When there is blower motor overtemperature in described blower motor (3) running, described temperature protection switch action, control the control coil action of described control switch (2), and then the main contact controlling described control switch (2) disconnects, described blower motor (3) is shut down, the one-off signal of described temperature protection switch is sent in described controller (6) and is counted simultaneously, and the action frequency of counter to described temperature protection switch in described controller (6) is added up; When described blower motor (3) shuts down certain hour, described temperature protection switch recovers normally, described temperature protection switch controls the control coil action of described control switch (2), and then the main contact controlling described control switch (2) closes, and described blower motor (3) runs; When the counters count in described controller (6) reaches the action frequency of setting to the accumulative action frequency of described temperature protection switch; described controller (6) sends described control switch (2) control coil actuating signal; and then the main contact controlling described control switch (2) disconnects; described blower motor (3) is shut down; control described control switch (2) after now no longer being recovered by described temperature protection switch to close, described control switch (2) remains on off-state always.
2. a blower motor protection and fault detection system, it is characterized in that, comprise: control switch (2), blower motor (3) and controller (6), be provided with temperature protection switch in the stator winding of described blower motor (3), and described controller is provided with counter in (6), when there is blower motor overtemperature in described blower motor (3) running, described temperature protection switch action, described temperature protection switch actuating signal transfers to described controller (6), the control coil action of described control switch (2) is controlled by described controller (6), and then the main contact controlling described control switch (2) disconnects, described blower motor (3) is shut down, the one-off signal of described temperature protection switch is sent in described controller (6) and is counted simultaneously, the action frequency of counter to described temperature protection switch in described controller (6) is added up, when described blower motor (3) shuts down certain hour, described temperature protection switch recovers normally, described temperature protection switch restoring signal transfers to described controller (6), the control coil action of described control switch (2) is controlled by described controller (6), and then the main contact controlling described control switch (2) closes, described blower motor (3) runs, when the counters count in described controller (6) reaches the action frequency of setting to the accumulative action frequency of described temperature protection switch, described controller (6) sends described control switch (2) control coil actuating signal, and then the main contact controlling described control switch (2) disconnects, described blower motor (3) is shut down, now described controller (6) no longer receives described temperature protection switch restoring signal, and described control switch (2) remains on off-state always.
3. a blower motor protection and fault detection system, it is characterized in that, comprise: control switch (2), blower motor (3) and controller (6), be provided with temperature sensor in the stator winding of described blower motor (3), and described controller is provided with timer sum counter in (6); In described blower motor (3) running, the temperature of stator winding described in described temperature sensor on-line monitoring, is sent to described controller (6) simultaneously and processes by temperature monitoring signal; The temperature monitoring signal of described controller (6) to described temperature sensor carries out record, and described controller (6) judges the threshold value whether described temperature monitoring signal exceedes setting; When the stator winding generation overtemperature fault of described blower motor (3), described controller (6) judges that the temperature monitoring signal of described temperature sensor exceedes the threshold value of setting, described controller (6) controls the control coil action of described control switch (2), and then the main contact controlling described control switch (2) disconnects, described blower motor (3) is shut down; The overtemperature number of stoppages of counter in described controller (6) to described stator winding counts, timer in described controller (6) is simultaneously to carrying out timing the downtime of described blower motor (3), when described blower motor (3) shuts down certain hour, reach the overtemperature recovery time of setting in described controller (6), the control coil action of described control switch (2) is controlled by described controller (6), and then the main contact controlling described control switch (2) closes, described blower motor (3) runs; When the counters count in described controller (6) reaches the number of stoppages of setting to the accumulative overtemperature number of stoppages of described stator winding; described controller (6) sends described control switch (2) control coil actuating signal; and then the main contact controlling described control switch (2) disconnects; described blower motor (3) is shut down; now described controller (6) no longer closes carrying out timing the downtime of described blower motor (3) and controlling described control switch (2), and described control switch (2) remains on off-state always.
4. blower motor protection according to any one of claim 1 to 3 and fault detection system, it is characterized in that: described control switch (2) comprises contactor (4) and the circuit breaker (5) of series connection mutually, and described control coil and main contact are arranged in described contactor (4); When described circuit breaker (5) occurs overcurrent, short trouble for described blower motor (3), disconnect described blower motor (3).
5. blower motor protection according to any one of claim 1 to 3 and fault detection system; it is characterized in that: described control switch (2) comprises circuit breaker (5); and adopting the structure installing shunt release on described circuit breaker (5) additional, described controller (6) carries out breaking operation by controlling described shunt release to described circuit breaker (5).
6. blower motor protection according to claim 4 and fault detection system; it is characterized in that: described system also comprises subordinate inverter (1); described controller (6) adopt motion control unit, described subordinate inverter (1) by described control switch (2) for described blower motor (3) provides power supply.
7. blower motor protection according to claim 6 and fault detection system; it is characterized in that: described system also comprises display (7); when described blower motor (3) is shut down; described control switch (2) remains on off-state always, and blower motor overtemperature failure alarm signal is transmitted through the network to described display (7).
8. blower motor protection and a fault detection method, is characterized in that, comprise the following steps:
S101: when blower motor overtemperature occurs blower motor (3) in running, temperature protection switch action in described blower motor (3) stator winding, the control coil action of control contactor (4), and then the main contact controlling described contactor (4) disconnects, described blower motor (3) is shut down, the one-off signal of described temperature protection switch is sent in described controller (6) and is counted simultaneously, and the action frequency of counter to described temperature protection switch in described controller (6) is added up;
S102: when described blower motor (3) shuts down certain hour, described temperature protection switch recovers normally, described temperature protection switch controls the control coil action of described contactor (4), and then the main contact controlling described contactor (4) closes, and described blower motor (3) runs;
S103: when described counters count to accumulative action frequency reach the action frequency of setting time; described controller (6) sends described contactor (4) control coil actuating signal; and then the main contact controlling described contactor (4) disconnects; described blower motor (3) is shut down; control described contactor (4) after now no longer being recovered by described temperature protection switch to close, described contactor (4) remains on off-state always.
9. blower motor protection and a fault detection method, is characterized in that, comprise the following steps:
S201: when blower motor overtemperature occurs blower motor (3) in running, temperature protection switch action in described blower motor (3) stator winding, described temperature protection switch actuating signal transfers to controller (6), the control coil action of described contactor (4) is controlled by described controller (6), and then the main contact controlling described contactor (4) disconnects, described blower motor (3) is shut down, the one-off signal of described temperature protection switch is sent in described controller (6) and is counted simultaneously, the action frequency of counter to described temperature protection switch in described controller (6) is added up,
S202: when described blower motor (3) shuts down certain hour, described temperature protection switch recovers normally, described temperature protection switch restoring signal transfers to described controller (6), the control coil action of described contactor (4) is controlled by described controller (6), and then the main contact controlling described contactor (4) closes, described blower motor (3) runs;
S203: when the counters count in described controller (6) reaches the action frequency of setting to the accumulative action frequency of described temperature protection switch; described controller (6) sends described contactor (4) control coil actuating signal; and then the main contact controlling described contactor (4) disconnects; described blower motor (3) is shut down; now described controller (6) no longer receives described temperature protection switch restoring signal, and described contactor (4) remains on off-state always.
10. blower motor protection and a fault detection method, is characterized in that, comprise the following steps:
S301: in blower motor (3) running, the temperature of stator winding described in the temperature sensor on-line monitoring in described blower motor (3) stator winding, is sent to controller (6) simultaneously and processes by temperature monitoring signal;
S302: the temperature monitoring signal of described controller (6) to described temperature sensor carries out record, described controller (6) judges the threshold value whether described temperature monitoring signal exceedes setting, when there is described blower motor (3) stator winding overtemperature fault, described controller (6) judges that the temperature monitoring signal of described temperature sensor exceedes the threshold value of setting, the control coil action of described controller (6) control contactor (4), and then the main contact controlling described contactor (4) disconnects, described blower motor (3) is shut down;
S303: the overtemperature number of stoppages of the counter in described controller (6) to described stator winding counts, timer in described controller (6) is simultaneously to carrying out timing the downtime of described blower motor (3), when described blower motor (3) shuts down certain hour, reach the overtemperature recovery time of setting in described controller (6), the control coil action of described contactor (4) is controlled by described controller (6), and then the main contact controlling described contactor (4) closes, described blower motor (3) runs;
S304: when the counters count in described controller (6) reaches the number of stoppages of setting to the accumulative overtemperature number of stoppages of described stator winding; described controller (6) sends described contactor (4) control coil actuating signal; and then the main contact controlling described contactor (4) disconnects; described blower motor (3) is shut down; now described controller (6) no longer closes carrying out timing the downtime of described blower motor (3) and controlling described contactor (4), and described contactor (4) remains on off-state always.
Blower motor protection according to any one of 11. according to Claim 8 to 10 and fault detection method; it is characterized in that; described method also comprises: when overcurrent, short trouble appear in described blower motor (3), disconnected the process of described blower motor (3) by circuit breaker (5).
12. blower motor protection according to claim 11 and fault detection methods; it is characterized in that; described method also comprises: when described blower motor (3) is shut down; when described control switch (2) remains on off-state always, blower motor overtemperature failure alarm signal is transmitted through the network to the process of display (7) simultaneously.
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Address after: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee after: ZHUZHOU CRRC TIMES ELECTRIC Co.,Ltd. Address before: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee before: ZHUZH CSR TIMES ELECTRIC Co.,Ltd. |