Multi-mode starting rapid switching redundant starting system

Abstract

The utility model relates to the field of diesel generating sets, in particular to a multi-mode starting rapid switching redundancy starting system which comprises a control module, a change-over switch, a first starting motor, a second starting motor, a first contactor, a second contactor, a starting relay and an intermediate relay. The control module is connected with the starting relay, the control module is respectively connected with the change-over switch, the change-over switch is respectively connected with the first starting motor, the second starting motor and the intermediate relay, the intermediate relay is respectively connected with the first contactor and the second contactor, the first contactor is connected with the first starting motor, and the second contactor is connected with the second starting motor. And the second contactor is connected with the second starting motor. The multi-mode starting and rapid switching redundant starting system provided by the utility model can realize multi-mode operation and rapid switching starting of the two starting motors, ensures the starting success rate of a unit, and improves the stability and reliability of the starting system.

Description

Technical Field

[0001] The utility model relates to the field of diesel generator sets, in particular to a multi-mode starting fast switching redundant starting system. Background Art

[0002] In industries such as nuclear power and military industry that require stable and reliable power supply, diesel generator sets have high reliability requirements as backup power supply. During the start-up process of the diesel generator set, when the start-up fails, it is necessary to check the starting system of the diesel generator set: electric starter motor, starter contactor, starter control output and connecting cable, etc. When the starting system fails, the equipment needs to be replaced. Especially when the electric starter motor fails, the time for troubleshooting and recovery is long, which is not conducive to meeting the customer's requirements for uninterrupted and reliable power supply. The application number is CN202011584858.9, and the name is a Chinese utility model patent for an uninterrupted power switching control circuit for a diesel generator set. When the first battery group fails or feeds power, the second battery group is connected, and the diesel generator set is powered by the second battery group. The DC power supply will not be interrupted during the entire switching process, which ensures the operation of the diesel generator set and improves the power supply reliability of the diesel generator set. Although the above scheme can realize the uninterrupted switching of the power control circuit of the motor group, the stability and reliability of the system cannot be guaranteed, and the success rate of the start-up of the unit cannot be ensured. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a stable and reliable multi-mode startup fast switching redundant startup system.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a multi-mode starting fast switching redundant starting system, including a control module, a conversion switch, a first starting motor, a second starting motor, a first contactor, a second contactor, a starting relay and an intermediate relay; the control module is connected to the starting relay, the control modules are respectively connected to the conversion switch, the conversion switch is respectively connected to the first starting motor, the second starting motor and the intermediate relay, the intermediate relay is respectively connected to the first contactor and the second contactor, the first contactor is connected to the first starting motor, and the second contactor is connected to the second starting motor.

[0005] Furthermore, the start output port of the control module is connected to a start relay.

[0006] Furthermore, it also includes a battery pack and a floating charger, the control module is connected to the floating charger, and the floating charger is connected to the battery.

[0007] Furthermore, it also includes a rectifier diode, and the floating charger is connected to the battery through the rectifier diode.

[0008] Furthermore, the normally open auxiliary contacts of the intermediate relay are connected to the first contactor and the second contactor respectively.

[0009] Furthermore, the normally open auxiliary contact of the first contactor is connected to the first starter motor, and the normally open auxiliary contact of the second contactor is connected to the second starter motor.

[0010] The beneficial effects of the utility model are: a multi-mode starting fast switching redundant starting system, in normal use, usually selects the first starter motor to start the unit, if the battery controlling the first starter motor is insufficient and cannot completely start the unit, or if there is a problem with the first starter motor, it is necessary to select the second starter motor to start the unit, if the generator set needs to be quickly started in an emergency, a dual motor can be selected to start the generator set. If you do not want to manually reset the first starter motor and then select the second starter motor to start the unit after the start fails, you can choose to automatically switch to start the generator set, and the automatic switching can realize the alternating cycle start between the two sets of motors. The multi-mode starting fast switching redundant starting system provided by the utility model is designed with two independent starter motors that can start the generator set independently. The multi-mode operation and fast switching start of the two starter motors can be realized through the conversion switch, ensuring the success rate of the unit start, and the two sets of electric starter motor control circuits are independent of each other, which improves the stability and reliability of the starting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of a multi-mode startup fast switching redundant startup system;

[0012] Description of labels:

[0013] 1. Control module; 2. Transfer switch; 3. First starter motor; 4. Second starter motor; 5. First contactor; 6. Second contactor; 7. Starter relay; 8. Intermediate relay; 9. Battery pack; 10. Float charger; 11. Rectifier diode. DETAILED DESCRIPTION

[0014] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0015] Please refer to Figure 1As shown, a multi-mode starting fast switching redundant starting system of the utility model includes a control module 1, a conversion switch 2, a first starting motor 3, a second starting motor 4, a first contactor 5, a second contactor 6, a starting relay 7 and an intermediate relay 8; the control module 1 is connected to the starting relay 7, the control module 1 is respectively connected to the conversion switch 2, the conversion switch 2 is respectively connected to the first starting motor 3, the second starting motor 4 and the intermediate relay 8, the intermediate relay 8 is respectively connected to the first contactor 5 and the second contactor 6, the first contactor 5 is connected to the first starting motor 3, and the second contactor 6 is connected to the second starting motor 4.

[0016] From the above description, it can be seen that the beneficial effects of the utility model are: a multi-mode start-up fast switching redundant start-up system, in normal use, usually selects the first starter motor to start the unit, if the battery controlling the first starter motor is insufficient and cannot completely start the unit, or if there is a problem with the first starter motor, it is necessary to select the second starter motor to start the unit, if the generator set needs to be quickly started in an emergency, the dual motor can be selected to start the generator set. If you do not want to manually reset the first starter motor 3 after the start-up fails and then select the second starter motor 4 to start the unit, you can choose to automatically switch to start the generator set, and the automatic switching can realize the alternating cyclic start between the two sets of motors. The multi-mode start-up fast switching redundant start-up system provided by the utility model is designed so that two independent starter motors can start the generator set separately. The multi-mode operation and fast switching start of the two starter motors can be realized through the conversion switch 2, ensuring the success rate of the start-up of the unit. The two sets of electric starter motor control circuits are independent of each other, and the stability and reliability of the starting system are improved.

[0017] In an optional embodiment, the start output port of the control module 1 is connected to the start relay 7 .

[0018] In an optional embodiment, a battery pack 9 and a floating charger 10 are further included, the control module 1 is connected to the floating charger 10, and the floating charger 10 is connected to the battery.

[0019] From the above description, it can be seen that in order to ensure the success rate of starting the unit, when the unit is running, the charging generator driven by the diesel engine floats the starting battery; when the unit is in standby mode, the starting battery of the generator set is charged through the configured independent AC charging device float charger 10 to maintain the battery in a fully charged state.

[0020] In an optional embodiment, a rectifying diode 11 is further included, and the floating charger 10 is connected to the battery via the rectifying diode 11 .

[0021] In an optional embodiment, the normally open auxiliary contacts of the intermediate relay 8 are connected to the first contactor 5 and the second contactor 6 respectively.

[0022] In an optional embodiment, the normally open auxiliary contact of the first contactor 5 is connected to the first starter motor 3 , and the normally open auxiliary contact of the second contactor 6 is connected to the second starter motor 4 .

[0023] The working principle of the utility model is: when the multi-mode conversion switch 2 selects the first motor, the generator set control module 1 outputs the first motor start instruction after receiving the start signal, at which time the first contactor 5 coil is energized, and the first start motor 3 is controlled to start the generator set. If the battery controlling the first start motor 3 is insufficient or the first start motor 3 is faulty, the second motor can be selected through the multi-mode conversion switch 2. After the generator set controller receives the start signal, it outputs the second motor start instruction. At this time, the second contactor 6 coil is energized, and the second start motor 4 is controlled to start the generator set. In order to quickly start the generator set in an emergency, the dual motor can be selected through the conversion switch 2. If you do not want to manually reset the first start motor 3 after it fails to start and then select the second start motor 4 to start the unit, you can choose to automatically switch to start the generator set. Through automatic switching, the two motors can be switched and operated according to the set number of cycle starts. The control circuits of the two sets of electric start motors are independent of each other. The two sets of electric starter motors are equipped with a corresponding number of battery packs 9, and each set of battery packs 9 is equipped with an independent AC charging device floating charger 10. The unidirectional rectifier diode 11 is used to charge the generator set starter battery. The unidirectional rectifier diode 11 can prevent the battery from feeding power to the outside and maintain the battery in a fully charged state. The capacity of the starter battery should be able to ensure that the unit starts 3 times without recharging after losing the AC power supply for up to 72 hours. A four-position conversion switch 2 is set on the control panel to realize the switching of two starting sequences. The conversion switch 2 selects the first motor and starts the unit through the first motor; the conversion switch 2 selects the second motor and starts the unit through the second motor; the conversion switch 2 selects dual motors and starts the unit through the first and second starter motors 4 at the same time; the conversion switch 2 selects automatic switching, the first starter motor 3 starts the unit first, and if it fails to start three times, it automatically switches to the second starter motor 4 to start (the number of start failures is adjustable). If the second starter motor 4 fails to start three times, it automatically switches to the first starter motor 3 to start the unit first, and if it fails to start three times, it automatically switches to the first starter motor 3 to start the unit first. The second starter motor 4 is started, and this cycle is repeated twice (the number of cycles can be set), then the unit alarms and shuts down, and needs to be manually reset before it can be restarted; this can avoid the situation where, when one of the starter motors is damaged or one set of batteries is low on power, it can quickly switch to another set of starter motors to start the generator set, thereby ensuring the reliability of starting in emergency situations; in addition, to ensure the success rate of starting the unit, when the unit is running, the charging generator driven by the diesel engine performs float charging on the starting battery; when the unit is in standby mode, the starting battery of the generator set is charged through the configured independent AC charging device float charger 10 to maintain the battery in a fully charged state.

[0024] Please refer to Figure 1As shown, the first embodiment of the utility model is: a multi-mode startup fast switching redundant startup system, including a control module 1, a conversion switch 2, a first starter motor 3, a second starter motor 4, a first contactor 5, a second contactor 6, a starter relay 7 and an intermediate relay 8; the control module 1 is connected to the starter relay 7, the control module 1 is connected to the conversion switch 2 respectively, the conversion switch 2 is connected to the first starter motor 3, the second starter motor 4 and the intermediate relay 8 respectively, the intermediate relay 8 is connected to the first contactor 5 and the second contactor 6 respectively, the first contactor 5 is connected to the first starter motor 3, and the second contactor 6 is connected to the second starter motor 4. The start output port of the control module 1 is connected to the starter relay 7. It also includes a battery pack 9 and a floating charger 10, the control module 1 is connected to the floating charger 10, and the floating charger 10 is connected to the battery. It also includes a rectifier diode 11, and the floating charger 10 is connected to the battery through the rectifier diode 11. The normally open auxiliary contacts of the intermediate relay 8 are connected to the first contactor 5 and the second contactor 6 respectively. The normally open auxiliary contact of the first contactor 5 is connected to the first starter motor 3 , and the normally open auxiliary contact of the second contactor 6 is connected to the second starter motor 4 .

[0025] When in use, press the start button of the control module 1, and the start signal controls the first start relay to be energized through the output port. The normally open auxiliary contacts of the first motor intermediate relay 8 and the normally open auxiliary contacts of the first start relay are connected to the first contactor 5, and the normally open auxiliary contacts of the first contactor 5 are connected to the first starter motor 3, thereby controlling the first starter motor 3 to start the unit through the first motor.

[0026] The conversion switch 2 is connected to the second motor intermediate relay 8. When the start button of the control module 1 is pressed, the start signal controls the second start relay to be energized through the output port. The normally open auxiliary contacts of the second motor intermediate relay 8 and the normally open auxiliary contacts of the second start relay are connected to the second contactor 6. The normally open auxiliary contacts of the second contactor 6 are connected to the second starter motor 4, thereby controlling the cranking of the second starter motor 4 to start the unit through the second motor.

[0027] The conversion switch 2 is connected to the dual-motor intermediate relay 8. When the start button of the control module 1 is pressed, the start signal controls the first start relay and the second start relay to be energized at the same time through the output port. The normally open auxiliary contacts of the dual-motor intermediate relay 8 and the normally open auxiliary contacts of the first start relay are connected to the first contactor 5, and the normally open auxiliary contacts of the first contactor 5 are connected to the first starter motor 3; the normally open auxiliary contacts of the dual-motor intermediate relay 8 and the normally open auxiliary contacts of the second start relay are connected to the second contactor 6, and the normally open auxiliary contacts of the second contactor 6 are connected to the second starter motor 4, thereby realizing the rapid switching of the two starter motors to start the generator set.

[0028] The conversion switch 2 is connected to the automatic switching intermediate relay 8. The control module 1 software sets the dual starting motor sequence as the first-second, and the number of cycles is set to 2. The start signal of the start button of the control module 1 is controlled through the output port to start the first relay to be attracted. The normally open auxiliary contact of the first motor intermediate relay 8 and the normally open auxiliary contact of the start first relay are connected to the first contactor 5. The normally open auxiliary contact of the first contactor 5 is connected to the first starting motor 3, thereby controlling the first starting motor 3 to start the unit through the first motor. After the first starting motor 3 fails to start three times, it automatically switches to the second starting motor 4. Through the second starting motor 4, the unit is started by the second motor. If the second starting motor 4 fails to start three times, it automatically switches to the first starting motor 3. Through the first starting motor 3, the unit is started by the first motor. After the first starting motor 3 fails to start three times, it automatically switches to the second starting motor 4. Through the second starting motor 4, the unit is started by the second motor. Since the number of cycle starts is set to 2, it can be realized that the two motors are started twice in turn. If the two motors fail to start twice in turn, the unit will alarm and shut down.

[0029] The first floating charger 10 is connected to the first rectifying diode 11, the first rectifying diode 11 is connected to the first motor starting battery, the second floating charger 10 is connected to the second rectifying diode 11, the second rectifying diode 11 is connected to the second motor starting battery, so that each battery group 9 is equipped with an independent AC charging device floating charger 10, and the generator starting battery is charged through the unidirectional rectifying diode 11. The unidirectional rectifying diode 11 can prevent the battery from feeding power to the outside and maintain the battery in a fully charged state.

[0030] After the controller of the diesel generator set receives the start signal, the oil valve and start signal are energized. If the start is not successful within the start time (such as the speed, oil pressure, etc. do not meet the start conditions), the controller will stop outputting the oil valve and start signal. Enter the start gap, and then start again. The controller outputs the oil valve and the start signal is energized, and then repeats the above start process. If the start conditions are met during the three start processes, the start is successful, and the diesel generator set starts the generator through the first starter motor 3. If the diesel generator set fails to start three times, the controller will report a start failure alarm and shut down. At this time, it is necessary to manually press the reset button on the unit module, and then switch to the second starter motor 4 through the conversion switch 2. At the same time, enter the start gap, and then start again. The controller outputs the oil valve and the start signal is energized to start the generator set through the second starter motor 4.

[0031] In summary, the multi-mode starting fast switching redundant starting system of the utility model, when in normal use, usually selects the first starter motor to start the unit. If the battery controlling the first starter motor is insufficient and cannot completely start the unit, or if there is a problem with the first starter motor, it is necessary to select the second starter motor to start the unit. If you need to quickly start the generator set in an emergency, you can choose to start the generator set with dual motors. If you do not want to manually reset the generator set after the first starter motor fails to start, you can choose to automatically switch to start the generator set. Automatic switching can achieve alternating cyclic starting between the two motors. The multi-mode starting fast switching redundant starting system provided by the utility model is designed with two independent starter motors that can start the generator set independently. The multi-mode operation and fast switching start of the two starter motors can be achieved through the conversion switch, ensuring the success rate of the unit start. The two sets of electric starter motor control circuits are independent of each other, which improves the stability and reliability of the starting system.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A multi-mode startup fast switching redundant startup system, characterized in that: It includes a control module, a conversion switch, a first starter motor, a second starter motor, a first contactor, a second contactor, a starter relay and an intermediate relay; the control module is connected to the starter relay, the control modules are respectively connected to the conversion switch, the conversion switch is respectively connected to the first starter motor, the second starter motor and the intermediate relay, the intermediate relay is respectively connected to the first contactor and the second contactor, the first contactor is connected to the first starter motor, and the second contactor is connected to the second starter motor.

2. The multi-mode startup fast switching redundant startup system according to claim 1, characterized in that: The start output port of the control module is connected to the start relay.

3. The multi-mode startup fast switching redundant startup system according to claim 1, characterized in that: It also includes a battery pack and a floating charger, wherein the control module is connected to the floating charger, and the floating charger is connected to the battery.

4. The multi-mode startup fast switching redundant startup system according to claim 3, characterized in that: It also includes a rectifier diode, and the floating charger is connected to the battery through the rectifier diode.

5. The multi-mode startup fast switching redundant startup system according to claim 1, characterized in that: The normally open auxiliary contacts of the intermediate relay are connected to the first contactor and the second contactor respectively.

6. The multi-mode startup fast switching redundant startup system according to claim 1, characterized in that: The normally open auxiliary contact of the first contactor is connected to the first starter motor, and the normally open auxiliary contact of the second contactor is connected to the second starter motor.

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