CN206237121U - ETP digital motor comprehensive protectors - Google Patents

Abstract

The utility model provides a kind of ETP digital motors comprehensive protector, including body and the power insert being located in the body, exchange plug-in unit, CPU card and input and output module, the power insert supplies electricity to the CPU card, the exchange plug-in unit and the input and output module are connected with each other with the CPU card respectively, the CPU card includes dsp chip and the clock plug-in unit being mutually coupled, respectively with the dsp chip, memory, communication module and MCU chip, the input and output module is connected with the dsp chip, the MCU chip is also associated with human-computer interaction module.The utility model is more perfect to motor protection, sensitive, reliable, and the sensitivity of whole device is high, high precision, functional reliability are high and convenient to install and maintain.

Description

ETP digital motor comprehensive protectors

Technical field

The utility model belongs to Protection Technology for Motors field, and in particular to a kind of ETP digital motors integrated protection Device.

Background technology

Motor is one of important load in power system, in power plant and industry and mining application widely.Therefore, do The protection work of good motor has very important significance.When the abnormal working position of the most common most serious of motor is long Between the overcurrent that causes of overload, long-time temperature rise causes heat accumulation, makes motor insulation ag(e)ing, and it is short that motor coil burns initiation Road failure.In working long hours, because the motor damages that overload causes account for sizable ratio in motor fault.

Proprietary numerical formula motor protecting device (publication number：CN201260072) disclose a kind of by all functional units All modularizations and standardization are integrated on casing in the way of plug-in unit, device interference-free mutually between each plug-in unit, use Scheme is：Liquid crystal display is provided with the left of front panel middle and upper part, indicator lamp is provided with the right side of liquid crystal display, set below liquid crystal display Operation button is equipped with, the lower right side of operation button is provided with serial line interface, and the lower section of operation button is provided with debugging from left to right Secure connection piece, ground connection point/combination switch and operational mode switching switch.But device inside uses uniprocessor, is not provided with Memory and clock plug-in unit, so the arithmetic speed and operational reliability of the device cannot be guaranteed, and are not provided with self-inspection Loop and reset loop are unfavorable for the self-inspection and maintenance of device.

Utility model content

The purpose of this utility model is to provide ETP digital motor comprehensive protectors, and motor protection is more added Kind, sensitive, reliable, the sensitivity of whole device is high, high precision, functional reliability are high and convenient to install and maintain.

The utility model provides following technical scheme：

A kind of ETP digital motors comprehensive protector, including body and the power insert, friendship being located in the body Stream plug-in unit, CPU card and input and output module, the power insert supply electricity to the CPU card, the exchange plug-in unit and described Input and output module is connected with each other with the CPU card respectively, and the CPU card includes dsp chip and divides with the dsp chip Clock plug-in unit, memory, communication module and the MCU chip not being connected with each other, the input and output module connect with the dsp chip Connect, the MCU chip is also associated with human-computer interaction module.

Preferably, the power insert uses 220V AC/DC Switching Power Supplies, the 220V AC/DCs switch Power supply connects the dsp chip, there is provided power supply needed for CPU card.

Preferably, the exchange plug-in unit includes some analog channels and A/D converter, and the analog channel connects the A/ D converters, the A/D converter connects the dsp chip, the voltage and current signal conversion of the exchange plug-in unit sampling motor Be low current or small voltage signal, it is adjusted after be input to after A/D converter and be sent to dsp chip and carry out calculating treatment.

Preferably, the CPU card also includes the reset circuit and frequency-survey loop that are connected with the dsp chip, described multiple Electrical isolation device is additionally provided between position circuit and the frequency-survey loop and the dsp chip, reset signal and frequency measurement signal are passed through Isolation is defeated to the dsp chip.

Preferably, the dsp chip uses 32 bit DSP chips, and it is MCU chip that the MCU chip uses 32, at double 32 Reason device ensure that the arithmetic speed and stability of device.

Preferably, the communication module uses RS485 buses, MODBUS and 103 transmission protocols is supported, conveniently with various pipes Reason system carries out communication connection, realizes synthesis automation function.

Preferably, the input and output module includes that what is be connected with the dsp chip respectively opens into unit and output unit, It is described to open into unit and the relay interface for outputing the external motor of unit, realize linkage protection.

Preferably, the human-computer interaction module includes the keyboard and display that are connected with the MCU chip respectively, realizes ginseng Several readings that given and data are set.

Preferably, the body front is provided with key-board like operation panel, LCD display and is located at the LCD display side LED light, the keyboard operation intralamellar part connecting key disk, the LCD display inside connection display, the LED is indicated Unit is outputed described in the connection of lamp inside.

Preferably, the back side of the body is provided with and opens into binding post, outputs binding post, DEBUG interfaces and adopt with exchanging Sample interface board, described opening is opened into unit into described in the connection of binding post inside, and described outputing is opened described in the connection of binding post inside Go out unit, the DEBUG interface internals connect the communication module, and the connection exchange in the AC sampling interface board inside is inserted Part.

The beneficial effects of the utility model are：Using double 32 bit processors, fast operation and reliable；Man-machine interaction Set, liquid crystal display real-time update is simple to operate；The setting of reset circuit and frequency-survey loop ensure that self examining for device Disconnected function, improves property safe and reliable to operation；Interior arrangement is integrated in casing in the way of plug-in unit, greatly reduces external electromagnetic The coupling in weak-feedback side of transmission line is disturbed, the antijamming capability of the present apparatus is enhanced, its reliability and security is improved.

Brief description of the drawings

Accompanying drawing is used for providing being further understood to of the present utility model, and constitutes a part for specification, with this practicality New embodiment is used to explain the utility model together, does not constitute to limitation of the present utility model.In the accompanying drawings：

Fig. 1 is the utility model internal structure principle schematic；

Fig. 2 is the utility model external structure schematic diagram；

Fig. 3 is the utility model outside schematic rear view；

Marked in figure：1. body；2.LCD display screens；3.LED indicator lamps；4. key-board like operation panel；5. open into terminals Son；6. binding post is outputed；7.DEBUG interfaces；8. AC sampling interface board.

Specific embodiment

As shown in figure 1, the power insert set in ETP digital motors comprehensive protector, exchange plug-in unit, CPU are inserted Part and input and output module, power insert use 220V AC/DC Switching Power Supplies, 220V AC/DCs Switching Power Supply to connect Connect dsp chip, there is provided power supply needed for CPU card.Exchange plug-in unit and input and output module are connected with each other with CPU card respectively, hand over Stream plug-in unit includes some analog channels and A/D converter, and analog channel connection A/D converter, A/D converter connects dsp chip, The voltage and current signal of exchange plug-in unit sampling motor is transformed to low current or small voltage signal, it is adjusted after be input to A/D and turn Dsp chip is sent to after parallel operation carries out calculating treatment.CPU card includes that dsp chip and the clock being connected with each other with dsp chip are inserted Part, memory, communication module and MCU chip, dsp chip use 32 bit DSP chips, and it is MCU chip that MCU chip uses 32, double 32 bit processors ensure that the arithmetic speed and stability of device.CPU card also include the reset circuit that is connected with dsp chip and Frequency-survey loop, is additionally provided with electrical isolation device, reset signal and frequency measurement signal between reset circuit and frequency-survey loop and dsp chip It is defeated to dsp chip through isolating.Communication module use RS485 buses, the fieldbus of High-Speed RS 485, the stipulations of standard 103 or MODBUS stipulations, communication speed reaches as high as 19.2kbps, and conveniently carrying out communication with various management systems is connected, and realizes comprehensively certainly Dynamicization function.Input and output module is connected with dsp chip, and MCU chip is also associated with human-computer interaction module.Input and output module bag Include opening into unit of being connected with dsp chip respectively and output unit, open into unit and the relay for outputing the external motor of unit Interface, realizes linkage protection.Human-computer interaction module includes the keyboard and display that are connected with MCU chip respectively, realizes parameter The reading of given and data is set.

As shown in Figures 2 and 3, the front of body 1 is provided with key-board like operation panel 4, LCD display 2 and is located at LCD display 2 one The LED light 3 of side, the inside of key-board like operation panel 4 connection keyboard, the inside of LCD display 2 connection display, in LED light 3 Unit is outputed in portion's connection.The back side of body 1 is provided with opens into binding post 5, outputs binding post 6, DEBUG interfaces 7 and adopt with exchanging Sample interface board 8, opens and is opened into unit into the connection of the inside of binding post 5, outputs the connection of the inside of binding post 6 and outputs unit, DEBUG The inside connecting communication module of interface 7, the inside of AC sampling interface board 8 connection exchange plug-in unit.

As Figure 1-3, ETP digital motors comprehensive protector is primarily adapted for use in 10kV and following voltage class electricity The protection and observing and controlling of motivation.Reflect three-phase type (or two-phase type) current quick-breaking and the overcurrent protection of phase fault.Fast tripping protection leads to The size for judging electric current is crossed come what is realized, is measured by exchanging plug-in unit, so can effectively escaped the huge of motor and open Streaming current, can ensure that motor provides the defence rotation-clogging protection that serious overload is caused after normally starting again.To prevent electricity Machine starts that time-harmonic wave is excessive to cause malfunction, and device CPU card sets up harmonic braking function, this function can be put into by definite value or Exit.Overcurrent protection is automatically exited from motor start-up, and startup is automatically engaged after terminating.When electric current is more than setting current and reaches To after setting time, overcurrent protection outlet.This protection can cause to start the protection of overlong time as motor rotation blockage, when motor is opened After the startup time that the dynamic time adjusts more than device, software is by electric motor starting flag clear, so that automatically put into overcurrent protection, By stall motor switch tripping.Secondary harmonic brake：Electric current and inrush phenomenon can correctly be distinguished, it is ensured that correct in the case of failure Action, not misoperation in the case of shoving is particularly suitable for multistage section breaker current supply circuit.The utility model can reflect motor Uneven, disconnected phase, the specified time of anti-phase and unbalanced fault negative phase-sequence or inverse-time overcurrent protection.Reflect that stator current is big simultaneously Small, device provides one section of overload tripping operation section and one section of overload alarm section, two sections of public one section of time limits to overload protection. Overload protection puts into after motor start-up is finished.Protection is provided to stall in startup or self-starting process.Motor is whole Rated load of the electric current still above 2 times after the fixed normal startup time, it is believed that motor there occurs stall, trip immediately.Enter one Step, the device reflects that earth-free or high resistance ground system earth failure zero-sequencedirectional protection and reflection motor press fever model Heating effect overtemperature protection (cross thermal tripping, temperature alarm, heat accumulation memory function).Motor because overtemperature protection act in After tripping operation, it is impossible to be again started up immediately, can be again started up until motor heat dissipation is to the temperature for allowing to start, be less than Before the temperature, cross thermal tripping contact and remain closed.In the case of needing emergency start, by persistently pressing answering on device panel Gui Jian, pressure recovers to " cold conditions " fever model, can be again started up.Under-voltage protection.Two-way non electrical quantity trips and two-way is non- Charge alert (can be adjusted when not using for common open into), the location status contact input of the in good time detection switch of device finds different Time delay is transmitted messages alert signal when often.The position signalling of the present apparatus is gathered by opening into unit, when trip(ping) circuit and closing circuit not just Normal alarm.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, although ginseng The utility model is described in detail according to previous embodiment, for a person skilled in the art, it still can be with Technical scheme described in foregoing embodiments is modified, or equivalent is carried out to which part technical characteristic.It is all Within spirit of the present utility model and principle, any modification, equivalent substitution and improvements made etc. should be included in this practicality Within new protection domain.

Claims (10)

1. a kind of ETP digital motors comprehensive protector, it is characterised in that including body and the electricity being located in the body Source plug-in unit, exchange plug-in unit, CPU card and input and output module, the power insert supply electricity to the CPU card, the exchange Plug-in unit and the input and output module respectively with the CPU card be connected with each other, the CPU card include dsp chip and with institute State clock plug-in unit, memory, communication module and MCU chip that dsp chip is mutually coupled, respectively, the input and output module and institute Dsp chip connection is stated, the MCU chip is also associated with human-computer interaction module.

2. ETP digital motors comprehensive protector according to claim 1, it is characterised in that the power insert Using 220V AC/DC Switching Power Supplies, the 220V AC/DCs Switching Power Supply connects the dsp chip.

3. ETP digital motors comprehensive protector according to claim 1, it is characterised in that the exchange plug-in unit Including some analog channels and A/D converter, the analog channel connects the A/D converter, and the A/D converter connects institute State dsp chip.

4. ETP digital motors comprehensive protector according to claim 1, it is characterised in that the CPU card is also Including the reset circuit and frequency-survey loop that are connected with the dsp chip, the reset circuit and the frequency-survey loop and the DSP Electrical isolation device is provided between chip.

5. ETP digital motors comprehensive protector according to claim 1, it is characterised in that the dsp chip is adopted With 32 bit DSP chips, it is MCU chip that the MCU chip uses 32.

6. ETP digital motors comprehensive protector according to claim 1, it is characterised in that the communication module Using RS485 buses.

7. ETP digital motors comprehensive protector according to claim 1, it is characterised in that the input and output Module includes that what is be connected with the dsp chip respectively opens into unit and output unit, described to open into unit and described output unit The relay interface of external motor

8. ETP digital motors comprehensive protector according to claim 1, it is characterised in that the man-machine interaction Module includes the keyboard and display that are connected with the MCU chip respectively.

9. ETP digital motors comprehensive protector according to claim 1, it is characterised in that the body front It is provided with key-board like operation panel, LCD display and is located at the LED light of the LCD display side, the keyboard operation intralamellar part Connection keyboard, the LCD display inside connection display, unit is outputed inside the LED light described in connection.

10. ETP digital motors comprehensive protector according to claim 1, it is characterised in that the back of the body of the body Face is provided with opens into binding post, outputs binding post, DEBUG interfaces and AC sampling interface board, described to open in binding post Opened into unit described in portion's connection, described outputing outputs unit described in the connection of binding post inside, the DEBUG interface internals connection The communication module, the AC sampling interface board inside connection exchange plug-in unit.