CN106058813A - Three-phase asynchronous motor power supply protection apparatus - Google Patents
Three-phase asynchronous motor power supply protection apparatus Download PDFInfo
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- CN106058813A CN106058813A CN201610535184.0A CN201610535184A CN106058813A CN 106058813 A CN106058813 A CN 106058813A CN 201610535184 A CN201610535184 A CN 201610535184A CN 106058813 A CN106058813 A CN 106058813A
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- 239000007787 solid Substances 0.000 claims abstract description 23
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000819 phase cycle Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
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- Protection Of Generators And Motors (AREA)
Abstract
本发明公开了一种三相异步电动机电源保护装置，包括固态继电器、移相电路、电压采样电路、整流滤波电路和电压比较电路。本发明在三相异步电动机的电源供电电路上依次设置移相电路、电压采样电路、整流滤波电路和电压比较电路，从而实时的对三相异步电动机的电源供电电路电压大小进行监测，当三相异步电动机的电源供电电路的电压大小异常超出设定的范围值，电压比较电路发送控制信号到固态继电器使其动作，固态继电器设置在三相异步电动机的电源供电电路上，从而使三相异步电动机的电源供电电路断开，有效的保护了三相异步电动机不受电压源电压不稳定的冲击等影响。
The invention discloses a three-phase asynchronous motor power supply protection device, which comprises a solid state relay, a phase shifting circuit, a voltage sampling circuit, a rectification and filtering circuit and a voltage comparison circuit. In the present invention, a phase-shifting circuit, a voltage sampling circuit, a rectification filter circuit and a voltage comparison circuit are sequentially arranged on the power supply circuit of a three-phase asynchronous motor, so as to monitor the voltage of the power supply circuit of a three-phase asynchronous motor in real time. The voltage of the power supply circuit of the asynchronous motor exceeds the set range value abnormally, the voltage comparison circuit sends a control signal to the solid state relay to make it act, and the solid state relay is set on the power supply circuit of the three-phase asynchronous motor, so that the three-phase asynchronous motor The power supply circuit of the power supply is disconnected, which effectively protects the three-phase asynchronous motor from the impact of unstable voltage source voltage.
Description
技术领域technical field
本发明涉及一种电源保护装置，尤其涉及一种三相异步电动机电源保护装置。The invention relates to a power protection device, in particular to a power protection device for a three-phase asynchronous motor.
背景技术Background technique
三相异步电动机在使用的过程中出现故障的原因是多种多样的，但由电源问题而引起的故障是主要的。电源问题主要表现为：三相电源相序接反、断相、三相电源电压不平衡三种，此故障出现时影响正常的使用，而且一旦故障，在进行更换维修时，检查故障的原因需要花费人力和物力，所以都能监测，且结构简单，具有实用价值。There are many reasons for the failure of the three-phase asynchronous motor during use, but the failure caused by the power supply problem is the main one. Power supply problems are mainly manifested as: three-phase power supply phase sequence reversed, phase failure, and three-phase power supply voltage imbalance. When this fault occurs, it will affect normal use. It costs manpower and material resources, so it can be monitored, and the structure is simple and has practical value.
发明内容Contents of the invention
本发明的目的是提供一种三相异步电动机电源保护装置，能够监测三相异步电动机电源端电流大小，从而保护三相异步电动机不受电电源故障的危害。The purpose of the present invention is to provide a three-phase asynchronous motor power supply protection device, which can monitor the magnitude of the current at the power supply terminal of the three-phase asynchronous motor, thereby protecting the three-phase asynchronous motor from the harm of the power supply failure.
本发明采用下述技术方案：The present invention adopts following technical scheme:
一种三相异步电动机电源保护装置，其特征在于：包括固态继电器、移相电路、电压采样电路、整流滤波电路和电压比较电路；所述的固态继电器连接在三相异步电动机的供电电源线路上，移相电路的输入端连接三相异步电动机的供电电源输出端，移相电路的输出端连接电压采样电路的输入端，电压采用电路的输出端连接整流滤波电路的输入端，整流滤波电路的输出端连接电压比较电路的输入端，电压比较电路的输出端连接固态继电器的输入端。A power supply protection device for a three-phase asynchronous motor, characterized in that it includes a solid state relay, a phase shifting circuit, a voltage sampling circuit, a rectification filter circuit and a voltage comparison circuit; the solid state relay is connected to the power supply line of the three-phase asynchronous motor , the input end of the phase-shifting circuit is connected to the output end of the power supply of the three-phase asynchronous motor, the output end of the phase-shifting circuit is connected to the input end of the voltage sampling circuit, the output end of the voltage adopting circuit is connected to the input end of the rectification and filtering circuit, and the output end of the rectification and filtering circuit The output terminal is connected to the input terminal of the voltage comparison circuit, and the output terminal of the voltage comparison circuit is connected to the input terminal of the solid state relay.
所述的固态继电器采用希曼顿 H3300ZD 交流固态继电器。The solid state relay adopts Himanton H3300ZD AC solid state relay.
所述的比较器型号为LS339。The described comparator model is LS339.
本发明结构简单，在三相异步电动机的电源供电电路上依次设置移相电路、电压采样电路、整流滤波电路和电压比较电路，从而实时的对三相异步电动机的电源供电电路电压大小进行监测，当三相异步电动机的电源供电电路的电压大小异常超出设定的范围值，电压比较电路发送控制信号到固态继电器使其动作，固态继电器设置在三相异步电动机的电源供电电路上，从而使三相异步电动机的电源供电电路断开，有效的保护了三相异步电动机不受电压源电压不稳定的冲击等影响。The present invention has a simple structure, and sequentially arranges a phase-shifting circuit, a voltage sampling circuit, a rectification filter circuit and a voltage comparison circuit on the power supply circuit of the three-phase asynchronous motor, thereby monitoring the voltage of the power supply circuit of the three-phase asynchronous motor in real time, When the voltage of the power supply circuit of the three-phase asynchronous motor exceeds the set range value abnormally, the voltage comparator circuit sends a control signal to the solid state relay to make it act, and the solid state relay is set on the power supply circuit of the three-phase asynchronous motor, so that the three The power supply circuit of the three-phase asynchronous motor is disconnected, which effectively protects the three-phase asynchronous motor from the impact of the unstable voltage of the voltage source.
附图说明Description of drawings
图1为本发明的电路原理框图。Fig. 1 is the block diagram of circuit principle of the present invention.
具体实施方式detailed description
如图1所示，一种三相异步电动机电源保护装置，包括固态继电器、移相电路、电压采样电路、整流滤波电路和电压比较电路；所述的固态继电器连接在三相异步电动机的供电电源线路上，移相电路的输入端连接三相异步电动机的供电电源输出端，移相电路的输出端连接电压采样电路的输入端，电压采用电路的输出端连接整流滤波电路的输入端，整流滤波电路的输出端连接电压比较电路的输入端，电压比较电路的输出端连接固态继电器的输入端。As shown in Figure 1, a kind of three-phase asynchronous motor power protection device, comprises solid state relay, phase-shifting circuit, voltage sampling circuit, rectification filter circuit and voltage comparison circuit; Described solid state relay is connected in the power supply of three-phase asynchronous motor On the line, the input end of the phase-shifting circuit is connected to the output end of the power supply of the three-phase asynchronous motor, the output end of the phase-shifting circuit is connected to the input end of the voltage sampling circuit, and the output end of the voltage adopting circuit is connected to the input end of the rectification and filtering circuit. The output end of the circuit is connected to the input end of the voltage comparison circuit, and the output end of the voltage comparison circuit is connected to the input end of the solid state relay.
由于所述的移相电路、电压采样电路、整流滤波电路和电压比较电路均是对交流电压进行取样电压监测的电路，以上所述电路均为常用电路，所以在此不再赘述其具体的结构，其配合能够对三相异步电动机的供电电源的电压进行采样和比较即可。Since the phase-shifting circuit, voltage sampling circuit, rectification and filtering circuit and voltage comparison circuit are all circuits for sampling and monitoring the AC voltage, the above-mentioned circuits are all commonly used circuits, so their specific structures will not be repeated here. , and its cooperation can sample and compare the voltage of the power supply of the three-phase asynchronous motor.
所述的固态继电器采用希曼顿 H3300ZD 交流固态继电器。所述的比较器型号为LS339。The solid state relay adopts Himanton H3300ZD AC solid state relay. The described comparator model is LS339.
由于采用继电接触器控制，存在重量大、体积大的缺点，采用电流互感器取信号，又有成本太高的问题，故本发明采用了电压采样：取自三相异步电动机的供电电源的信号经移相电路移相后采样，再经整流、滤波后变为直流电压，送到电压比较器（LS339）进行比较。比较后所得的信号用来控制固态继电器的通断状态。当固态继电器断开，则电动机不接入电源。考虑到电网正常波动问题，所在电压比较时设置了“窗口”电压，“窗口”的大小由电源电压正常波动的幅度而定。若采样来的信号经整流、滤波后，其电压落入窗口，则说明电源相序正确，且电压平衡，于是控制信号使固态继电器（SSR）输出端接通，电动机电源接入；若经处理后的电压不落入“窗口”，则说明电源出现问题，电路输出相反的控制信号，于是控制信号使固态继电器（SSR）输出端不接通，电动机电源不接入，电动机得到保护。Due to the use of relay contactor control, there are disadvantages of heavy weight and large volume, and the use of current transformers to obtain signals has the problem of high cost. Therefore, the present invention uses voltage sampling: taken from the power supply of the three-phase asynchronous motor The signal is sampled after being phase-shifted by the phase-shifting circuit, and then rectified and filtered to become a DC voltage, which is sent to a voltage comparator (LS339) for comparison. The signal obtained after comparison is used to control the on-off state of the solid-state relay. When the solid state relay is disconnected, the motor is not connected to the power supply. Considering the normal fluctuation of the power grid, a "window" voltage is set during the voltage comparison, and the size of the "window" is determined by the normal fluctuation range of the power supply voltage. If the voltage of the sampled signal falls into the window after being rectified and filtered, it means that the phase sequence of the power supply is correct and the voltage is balanced, so the control signal makes the output terminal of the solid state relay (SSR) connected, and the motor power supply is connected; If the final voltage does not fall into the "window", it means that there is a problem with the power supply, and the circuit outputs the opposite control signal, so the control signal makes the output terminal of the solid state relay (SSR) not connected, the motor power supply is not connected, and the motor is protected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610535184.0A CN106058813A (en) | 2016-07-08 | 2016-07-08 | Three-phase asynchronous motor power supply protection apparatus |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030071591A1 (en) * | 2001-10-04 | 2003-04-17 | Texas Instruments Incorporated | Three-phase motor protector apparatus |
| WO2006038544A1 (en) * | 2004-10-04 | 2006-04-13 | Daikin Industries, Ltd. | Power supply circuit protecting method and apparatus for the same |
| KR20060114208A (en) * | 2005-04-29 | 2006-11-06 | 최대섭 | Automatic Phase Conversion and Protection Circuit for Solar Inverters |
| RU2361356C1 (en) * | 2008-07-31 | 2009-07-10 | Открытое акционерное общество Научно-исследовательский и конструкторско-технологический институт подвижного состава (ОАО "ВНИКТИ") | Method and device for control of asynchronous motor |
| CN201388044Y (en) * | 2009-04-07 | 2010-01-20 | 丹东国通电子元件有限公司 | Motor phase sequence protector |
| CN102005728A (en) * | 2010-11-28 | 2011-04-06 | 河海大学常州校区 | Power protector for three-phase asynchronous motor |
| CN102082414A (en) * | 2009-11-27 | 2011-06-01 | 丁幼先 | Open-phase protector of electric motor of voltage comparison type |
| CN205992728U (en) * | 2016-07-08 | 2017-03-01 | 国家电网公司 | A kind of threephase asynchronous apparatus for protecting power supply |
-
2016
- 2016-07-08 CN CN201610535184.0A patent/CN106058813A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030071591A1 (en) * | 2001-10-04 | 2003-04-17 | Texas Instruments Incorporated | Three-phase motor protector apparatus |
| WO2006038544A1 (en) * | 2004-10-04 | 2006-04-13 | Daikin Industries, Ltd. | Power supply circuit protecting method and apparatus for the same |
| KR20060114208A (en) * | 2005-04-29 | 2006-11-06 | 최대섭 | Automatic Phase Conversion and Protection Circuit for Solar Inverters |
| RU2361356C1 (en) * | 2008-07-31 | 2009-07-10 | Открытое акционерное общество Научно-исследовательский и конструкторско-технологический институт подвижного состава (ОАО "ВНИКТИ") | Method and device for control of asynchronous motor |
| CN201388044Y (en) * | 2009-04-07 | 2010-01-20 | 丹东国通电子元件有限公司 | Motor phase sequence protector |
| CN102082414A (en) * | 2009-11-27 | 2011-06-01 | 丁幼先 | Open-phase protector of electric motor of voltage comparison type |
| CN102005728A (en) * | 2010-11-28 | 2011-04-06 | 河海大学常州校区 | Power protector for three-phase asynchronous motor |
| CN205992728U (en) * | 2016-07-08 | 2017-03-01 | 国家电网公司 | A kind of threephase asynchronous apparatus for protecting power supply |
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Application publication date: 20161026 |