CN102412563B - Motor start-up procedure protector - Google Patents
Motor start-up procedure protector Download PDFInfo
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- CN102412563B CN102412563B CN201110370333.XA CN201110370333A CN102412563B CN 102412563 B CN102412563 B CN 102412563B CN 201110370333 A CN201110370333 A CN 201110370333A CN 102412563 B CN102412563 B CN 102412563B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000001012 protector Effects 0.000 title claims abstract description 20
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- 230000001052 transient effect Effects 0.000 claims description 32
- 238000005259 measurement Methods 0.000 claims description 13
- 238000007493 shaping process Methods 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 7
- 239000007858 starting material Substances 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention discloses a motor start-up procedure protector. The motor start-up procedure protector comprises a host, a speed measuring fluted disc and a rotating speed sensor. When a motor is started and starts to rotate, the host of the motor start-up procedure protector starts to accurately measure the instantaneous rotating speed of the motor under the triggering of a motor start-up switching signal, accurately calculates the starting time of the motor at the same time, and compares the instantaneous rotating speed and the starting time of the motor with theoretical rotating speed-time curve data of a designed start-up procedure of the motor stored in a memory. If the instantaneous rotating speed measured by the protector accords with a theoretical rotating speed-time curve of the designed start-up procedure of the motor, the start-up procedure of the motor is normal; and if the instantaneous rotating speed measured by the protector deviates from the theoretical rotating speed-time curve of the designed start-up procedure of the motor, a device sounds an alarm immediately and motor protective equipment is started by turning off a relay. The motor start-up procedure protector can quickly detect faults in the start-up procedure of the motor and starts the motor protective equipment in time to prevent the motor from an accident.
Description
Technical field
The present invention relates to a kind of motor start-up procedure protector.
Background technology
The start-up course of motor is the start-up course of a significant process, particularly AC asynchronous motor in motor operation course and the pumped storage motor asynchronous starting process during as motor.Motor asynchronous starting process electric current is excessive is the shortcoming that motor self cannot overcome, motor start-up procedure electric current is excessive not only can be made electrical network produce excessive voltage-drop and affect the normal operation of other electric machinery and apparatus being connected on electrical network, and can make motor itself be subject to the impact of excessive electromagnetic force, make in addition the overheated danger of motor winding, thereby affect the security of operation of motor.Therefore, if people always wish that motor breaks down in start-up course, starting protection equipment at once, in order to avoid motor is damaged.
Summary of the invention
The object of the invention is to disclose a kind of motor start-up procedure protector; the precise time that can accurately measure the transient speed of motor start-up procedure and reach this rotating speed; and compare with the start-up course theoretical rotational speed-time graph of design of electrical motor; if motor transient speed deviates from the start-up course theoretical rotational speed-time graph of motor; motor start-up procedure breaks down, and protective device is reported to the police rapidly and starter motor protects equipment to reach the object of protection motor.
The object of the invention is to be achieved through the following technical solutions: motor start-up procedure protector comprises main frame, speed measuring fluted disc, speed probe, main frame consists of the embedded TT&C system of NI CompactRIO technical grade of America NI company, the system integration embedded in real time (Real-time) controller, programmable hardware logic (FPGA) and reconfigurable I/O module, protective device main frame specifically comprises: real-time controller U1 is installed in cabinet, relay module U2, NI-9401 type numeral I/O module U3, signal shaping module U4, NI-9411 type counter module U5, sound and light alarm module U6, after electric motor starting, speed measuring fluted disc rotates with motor, speed probe produces a series of rotational speed pulse signal S, rotational speed pulse signal S is input to counter module U5 after signal shaping module U4 shaping, controller U1 controls U5 and starts accurately to measure motor transient speed under the triggering of electric motor starting switching signal, the motor starting time of accurate measurement simultaneously, controller U1 is measurement result and be stored in the design of electrical motor start-up course theoretical rotational speed-time graph data comparison in internal memory, if at very first time point, motor transient speed be not less than in internal memory, store put corresponding theoretical transient speed value with the very first time, electric motor starting is normal, continue the measurement of next transient speed, if at the second time point, the new motor transient speed of measuring is not less than the theoretical transient speed value corresponding with the second time point of storing in internal memory, and electric motor starting is normal, continues the measurement of next transient speed, go on successively, until complete motor start-up procedure, if on any one time point, the motor transient speed of measuring is significantly less than the theoretical transient speed value corresponding to time point therewith of storing in internal memory, show that motor start-up procedure is not normal, controller U1 control figure I/O module U3 triggers sound and light alarm module U6 and at once reports to the police, by controlling U2 closed relay, carry out starter motor protection equipment, to protect motor safety simultaneously.In protective device console controller U1 internal memory of the present invention, pre-enter the storage a series of data corresponding with the start-up course theoretical rotational speed-time graph of design of electrical motor.The present invention judges the whether normal protective device of electric motor starting according to the design start-up course theoretical rotational speed-time graph of motor in motor start-up procedure; it is abnormal that it can detect rapidly the rotating speed occurring in motor asynchronous starting process the soonest within the time at several seconds zero point; than traditional relay protection mode, can detect more quickly the fault occurring in motor start-up procedure; at once actuating motor protection equipment, avoids motor that great interruption of service occurs.
Accompanying drawing explanation
Fig. 1 is invention main frame theory diagram
Fig. 2 is that application work of the present invention connects block diagram
Embodiment
Motor start-up procedure protector as shown in Figure 1, motor start-up procedure protector comprises main frame, speed measuring fluted disc, speed probe, main frame consists of the embedded TT&C system of NI CompactRIO technical grade of America NI company, the system integration embedded in real time (Real-time) controller, programmable hardware logic (FPGA) and reconfigurable I/O module, protective device main frame specifically comprises: real-time controller U1 is installed in cabinet, relay module U2, NI-9401 type numeral I/O module U3, signal shaping module U4, NI-9411 type counter module U5, sound and light alarm module U6, after electric motor starting, speed measuring fluted disc rotates with motor, speed probe produces a series of rotational speed pulse signal S, rotational speed pulse signal S is input to counter module U5 after signal shaping module U4 shaping, controller U1 controls U5 and starts accurately to measure motor transient speed under the triggering of electric motor starting switching signal, the motor starting time of accurate measurement simultaneously, controller U1 is measurement result and be stored in the design of electrical motor start-up course theoretical rotational speed-time graph data comparison in internal memory, if at very first time point, motor transient speed be not less than in internal memory, store put corresponding theoretical transient speed value with the very first time, electric motor starting is normal, continue the measurement of next transient speed, if at the second time point, the new motor transient speed of measuring is not less than the theoretical transient speed value corresponding with the second time point of storing in internal memory, and electric motor starting is normal, continues the measurement of next transient speed, go on successively, until complete motor start-up procedure, if on any one time point, the motor transient speed of measuring is significantly less than the theoretical transient speed value corresponding to time point therewith of storing in internal memory, show that motor start-up procedure is not normal, controller U1 control figure I/O module U3 triggers sound and light alarm module U6 and at once reports to the police, by controlling U2 closed relay, carry out starter motor protection equipment, to protect motor safety simultaneously.
Electricity as shown in Figure 2; when motor is activated while starting to rotate; speed probe produces a series of rotational speed pulse signals; rotational speed pulse signal is input to motor start-up procedure protector main frame; meanwhile, the startup switching signal of motor is input to protective device main frame as the enabling signal of motor start-up procedure protector work.When motor starts to start rotation; motor start-up procedure protector starts accurately to measure motor transient speed under the triggering of electric motor starting switching signal; the motor starting time of accurate measurement simultaneously, and compare with the design of electrical motor start-up course theoretical rotational speed-time graph data that are stored in internal memory.If the transient speed of protector measuring meets the start-up course theoretical rotational speed-time graph of design of electrical motor, motor start-up procedure is normal; If the serious rotating speed of the transient speed of any one time point of protector measuring deviates from design of electrical motor start-up course theoretical rotational speed-time graph, device is at once reported to the police and is passed through closed relay starter motor protection equipment.
Claims (1)
1. motor start-up procedure protector, it is characterized in that: motor start-up procedure protector comprises main frame, speed measuring fluted disc, speed probe, main frame consists of the embedded TT&C system of NI CompactRIO technical grade of America NI company, the system integration embedded in real time (Real-time) controller, programmable hardware logic (FPGA) and reconfigurable I/O module, protective device main frame specifically comprises: real-time controller U1 is installed in cabinet, relay module U2, NI-9401 type numeral I/O module U3, signal shaping module U4, NI-9411 type counter module U5, sound and light alarm module U6, after electric motor starting, speed measuring fluted disc rotates with motor, speed probe produces a series of rotational speed pulse signal S, rotational speed pulse signal S is input to counter module U5 after signal shaping module U4 shaping, controller U1 controls U5 and starts accurately to measure motor transient speed under the triggering of electric motor starting switching signal, the motor starting time of accurate measurement simultaneously, controller U1 is measurement result and be stored in the design of electrical motor start-up course theoretical rotational speed-time graph data comparison in internal memory, if at very first time point, motor transient speed be not less than in internal memory, store put corresponding theoretical transient speed value with the very first time, electric motor starting is normal, continue the measurement of next transient speed, if at the second time point, the new motor transient speed of measuring is not less than the theoretical transient speed value corresponding with the second time point of storing in internal memory, and electric motor starting is normal, continues the measurement of next transient speed, go on successively, until complete motor start-up procedure, if on any one time point, the motor transient speed of measuring is significantly less than the theoretical transient speed value corresponding to time point therewith of storing in internal memory, show that motor start-up procedure is not normal, controller U1 control figure I/O module U3 triggers sound and light alarm module U6 and at once reports to the police, by controlling U2 closed relay, carry out starter motor protection equipment, to protect motor safety simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110370333.XA CN102412563B (en) | 2011-11-21 | 2011-11-21 | Motor start-up procedure protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110370333.XA CN102412563B (en) | 2011-11-21 | 2011-11-21 | Motor start-up procedure protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102412563A CN102412563A (en) | 2012-04-11 |
| CN102412563B true CN102412563B (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110370333.XA Expired - Fee Related CN102412563B (en) | 2011-11-21 | 2011-11-21 | Motor start-up procedure protector |
Country Status (1)
| Country | Link |
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| CN (1) | CN102412563B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208899B (en) * | 2015-05-06 | 2019-06-07 | 比亚迪股份有限公司 | Motor control method and control device |
| CN109495022A (en) * | 2018-11-22 | 2019-03-19 | 天津市西青区华兴电机制造有限公司 | A kind of motor start-up procedure protector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4521894A (en) * | 1982-04-22 | 1985-06-04 | Saskatchewan Power Corporation | Overspeed/underspeed detector |
| US4939437A (en) * | 1988-06-22 | 1990-07-03 | Siemens Energy & Automation, Inc. | Motor controller |
| CN101501952A (en) * | 2006-07-31 | 2009-08-05 | 丹纳赫传动有限责任公司 | Overload prevention device for permanent magnet DC motors |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6800952B2 (en) * | 2002-06-18 | 2004-10-05 | Dana Corporation | Method of protection and fault detection for starter/alternator operating in the starter mode |
| DE102006045000A1 (en) * | 2005-09-29 | 2007-04-19 | Danfoss Compressors Gmbh | Method and control system for starting a motor for driving a compressor |
-
2011
- 2011-11-21 CN CN201110370333.XA patent/CN102412563B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4521894A (en) * | 1982-04-22 | 1985-06-04 | Saskatchewan Power Corporation | Overspeed/underspeed detector |
| US4939437A (en) * | 1988-06-22 | 1990-07-03 | Siemens Energy & Automation, Inc. | Motor controller |
| CN101501952A (en) * | 2006-07-31 | 2009-08-05 | 丹纳赫传动有限责任公司 | Overload prevention device for permanent magnet DC motors |
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| Publication number | Publication date |
|---|---|
| CN102412563A (en) | 2012-04-11 |
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