CN201733263U - Digital-display electric motor star/triangle conversion energy-saving protector - Google Patents
Digital-display electric motor star/triangle conversion energy-saving protector Download PDFInfo
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- CN201733263U CN201733263U CN2010202668861U CN201020266886U CN201733263U CN 201733263 U CN201733263 U CN 201733263U CN 2010202668861 U CN2010202668861 U CN 2010202668861U CN 201020266886 U CN201020266886 U CN 201020266886U CN 201733263 U CN201733263 U CN 201733263U
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Abstract
The utility model discloses a digital-display electric motor star/triangle conversion energy-saving protector, which relates to the field of low-voltage electric appliances and electric motor protectors. Conventional electric motor protectors mostly adopt traditional overload protection, phase loss protection, three-phase current imbalance protection and the like and are only suitable for common electric motor protection. The digital-display electric motor star/triangle conversion energy-saving protector automatically converts long-term triangular light-load running into star energy-saving running of a high-current electric motor, sufficiently uses inherent characteristics of the electric motor to achieve optimal utilization, is provided with visual digital setting and digital display, is stable in performance, fine in protection effect and the like, and solves originally existing key problems.
Description
Technical field:
The utility model relates to low-voltage electrical apparatus, field of electromotor protectors, particularly star/triangle conversion energy-saving protector of digital readout electromotor.
Technical background:
General in the past motor protector mostly is traditional protections such as overload, the phase failure and three-phase current unbalance; shortcoming is only to be suitable for general motor protection; do not consider the automatic conversion of large-current electric motivation star/delta running; long-time light running can not be automatically converted to the star power-saving running for motor, can not make full use of the intrinsic characteristic of motor and reach optimized use.
Summary of the invention:
The purpose of this utility model is at a kind of automatic conversion with the running of motor star/delta of above-mentioned defective invention; the long-time light running of motor is automatically converted to the star power-saving running; and have numeral setting intuitively and digital the demonstration; stable performance, protection are effective etc., have solved the key issue of former existence.
The technical solution of the utility model: star/triangle conversion energy-saving protector of digital readout electromotor comprises main control circuit or star/triangle economize on electricity change-over circuit or the electromotor overload phase failure and unbalance protection of three-phase current circuit or digital display circuit; it is characterized in that main control circuit three phase mains UVW connects contactor KM1 control; three-phase main circuit after the contactor KM1 control runs through current transformer L1 summation current transformer L2 summation current transformer L3 respectively; the lead-out wire U1 and a lead-out wire V2 and the lead-out wire W3 that connect motor M winding then; lead-out wire U1 is connected contactor KM3 with a lead-out wire V2 again with a lead-out wire W3; contactor KM3 control back connects tail lead-out wire u1 and the tail lead-out wire v2 and the tail lead-out wire w3 of motor M winding; the tail lead-out wire u1 of motor M winding is connected contactor KM2 with tail lead-out wire v2 again with tail lead-out wire w3; connect the three-way short circuit of the contactor KM2 other end; motor M triangle operation during contactor KM3 adhesive, motor M star operation during contactor KM2 adhesive.
Said digital readout electromotor star/angle conversion energy-saving protector; it is characterized in that star/triangle economize on electricity change-over circuit; when the long-time light running of motor, be automatically converted to the star power-saving running; current transformer L1 summation current transformer L2 summation current transformer L3 one end short circuit; the other end connects diode D5; diode D6; diode D7; diode D8; diode D9; diode D10 carries out rectification; after the rectification on signal resistance R4 the number of winning the confidence connect by resistance R 6; operational amplifier IC1b; the amplification initialization circuit that diode D12 and dial-up K1 and dial-up K2 and dial-up K3 three figure places are formed; be connected by operational amplifier IC2a with R8 filtering one tunnel through electrochemical capacitor C7; resistance R 35; resistance R 36; resistance R 37; electrochemical capacitor C15; the run indicator circuit that LED 1 is formed; another road connects the resistance R 39 and the diode D29 of operating current identification circuit; the negative input end of the other end concatenation operation amplifier IC2b of resistance R 39 and diode D29 and the negative pole of electrochemical capacitor C31; the positive input terminal of operational amplifier IC2b connects diode D28; diode D30; resistance R 38; resistance R 53; resistance R 52; resistance R 54 and electrochemical capacitor C30; the diode D28 other end connects the positive pole of LED; diode D30; resistance R 38; resistance R 53 is connected negative supply VCC with the electrochemical capacitor C30 other end; the output of resistance R 54 other end concatenation operation amplifier IC2b; the electrochemical capacitor C31 other end is connected to the output of operational amplifier IC2b through diode D45; resistance R 52 other ends connect positive supply 18V; the output of operational amplifier IC2b connects resistance R 55 and resistance R 56; resistance R 55 other ends connect diode D31; electrochemical capacitor C32 negative pole connects negative supply VCC; the other end of resistance R 56 and the positive pole of diode D31 and electrochemical capacitor C32 connect output and remove to be connected the star/triangle control switching circuit; the negative input end of operational amplifier IC2c; the positive input terminal of operational amplifier IC2c connects resistance R 57; resistance R 58; resistance R 59 and capacitor C 33; resistance R 57 other ends connect positive supply 18V; resistance R 58 is connected negative supply VCC with capacitor C 33 other ends; resistance R 59 other ends connect the anodal and operational amplifier IC2c output of electrochemical capacitor C34; electrochemical capacitor C34 negative pole connects negative supply VCC; operational amplifier IC2c output connects control relay J2 and J3 and LED 2 negative poles and LED 3 positive poles; LED 2 positive poles connect positive supply 18V through resistance R 61 with the control relay J2 other end; LED 3 negative poles connect negative supply VCC through resistance R 60 with the control relay J3 other end; operational amplifier IC2c output is time control relay J 3 adhesives control main circuit contact device KM3 adhesive motor triangle wiring running for high level; time control relay J 3 discharges control main circuit contact device KM2 adhesive motor star-star connections running to operational amplifier IC2c output for low level, and control relay J2 adhesive at this moment makes resistance R 62 and the accuracy of the multiplication factors assurance overload protection of resistance R 6 change operational amplifier IC1b in parallel and the normal conversion that star/triangle turns round.
Said star/triangle conversion energy-saving protector of digital readout electromotor; it is characterized in that the electromotor overload phase failure and unbalance protection of three-phase current circuit; the motor three-phase operating current that current transformer L1 summation current transformer L2 summation current transformer L3 detects is exported wherein one tunnel connection through the sampled signal processing and is protected initialization circuit to protect judgement to connect fault logic circuits and overload indicating circuit again through overload; another road connects the phase failure and unbalance protection of three-phase current circuit; connect the fault logic circuits and the phase failure and unbalance protection of three-phase current indicating circuit after judging again; fault logic circuits control control relay J1 adhesive when the overload phase failure and three-phase current unbalance fault occurring; control main circuit contact device KM1 outage, motor is out of service.
Said digital readout electromotor star-angle conversion energy-saving protector is characterized in that digital display circuit is that sampled signal processing back connection A/D conversion connects digital display circuit demonstration motor operating current again through the digital circuit processing.
Description of drawings:
Fig. 1, star/triangle conversion energy-saving protector of digital readout electromotor functional-block diagram.
Fig. 2, motor star/triangle conversion energy-saving protector circuit theory diagrams.
UVW three phase mains, KM contactor, M motor, FU insurance, SB1 starting button, SB2 stop button, L current transformer, J relay, K toggle switch, D diode, LED light-emitting diode, IC operational amplifier, R resistance, C electric capacity, 18V positive supply, VCC negative supply among the figure.
Fig. 1 star/triangle conversion energy-saving protector of digital readout electromotor functional-block diagram; adhesive when main control circuit contactor KM1 is operation; disconnect when fault or shutdown; adhesive when contactor KM3 is the triangle operation; disconnect when star operation or fault or shutdown; adhesive when contactor KM2 is the star operation; disconnect when triangle operation or fault or shutdown; one the tunnel went numeral to show operating current after sampled signal was processed; one the tunnel removes overload protection; one the tunnel removes the disconnected unbalance protection of three-phase current that reaches mutually, and one the tunnel goes star/triangle economize on electricity conversion.
Fig. 2 is the energy-conservation transfer principle figure of digital readout electromotor star/triangle, operational amplifier IC1a amplifies output and goes numeral to show operating current, operational amplifier IC1b is that toggle switch is set amplification, operational amplifier IC2a is the controlling run indicator lamp, operational amplifier IC2b is the operating current identification circuit, and operational amplifier IC2b is star/triangle conversion control circuit.
Implementation method:
Main control circuit three phase mains UVW connects contactor KM1 control among Fig. 1, three-phase main circuit after the contactor KM1 control runs through current transformer L1 summation current transformer L2 summation current transformer L3 respectively, the lead-out wire U1 and a lead-out wire V2 and the lead-out wire W3 that connect motor M winding then, lead-out wire U1 is connected contactor KM3 with a lead-out wire V2 again with a lead-out wire W3, contactor KM3 control back connects tail lead-out wire w3 and the tail lead-out wire v2 and the tail lead-out wire u1 of motor M winding, the tail lead-out wire u1 of motor M winding is connected contactor KM2 with tail lead-out wire v2 again with tail lead-out wire w3, connect the three-way short circuit of the contactor KM2 other end, motor M triangle operation during contactor KM3 adhesive, motor M star operation during contactor KM2 adhesive.Sampled signal is handled back one tunnel and is gone numeral to show operating current, and one the tunnel removes overload protection, and one the tunnel removes the phase failure and unbalance protection of three-phase current, and one the tunnel goes star/triangle economize on electricity conversion.
Fig. 2 is motor star/triangle conversion energy-saving protector circuit theory diagrams; when the long-time light running of motor, be automatically converted to the star power-saving running; current transformer L1 summation current transformer L2 summation current transformer L3 one end short circuit; the other end connects diode D5; diode D6; diode D7; diode D8; diode D8; diode D9 carries out rectification; after the rectification on signal resistance R4 the number of winning the confidence connect by resistance R 6; operational amplifier IC1b; the amplification initialization circuit that diode D12 and dial-up K1 and dial-up K2 and dial-up K3 three figure places are formed; be connected by operational amplifier IC2a with R8 filtering one tunnel through electrochemical capacitor C7; resistance R 35; resistance R 36; resistance R 37; electrochemical capacitor C15; the run indicator circuit that LED 1 is formed; another road connects the resistance R 39 and the diode D29 of operating current identification circuit; the negative input end of the other end concatenation operation amplifier IC2b of resistance R 39 and diode D29 and the negative pole of electrochemical capacitor C31; the positive input terminal of operational amplifier IC2b connects diode D28; diode D30; resistance R 38; resistance R 53; resistance R 52; resistance R 54 and electrochemical capacitor C30; the diode D28 other end connects the positive pole of LED; diode D30; resistance R 38; resistance R 53 is connected negative supply VCC with the electrochemical capacitor C30 other end; the output of resistance R 54 other end concatenation operation amplifier IC2b; the electrochemical capacitor C31 other end is connected to the output of operational amplifier IC2b through diode D45; resistance R 52 other ends connect positive supply 18V; the output of operational amplifier IC2b connects resistance R 55 and resistance R 56; resistance R 55 other ends connect diode D31; electrochemical capacitor C32 negative pole connects negative supply VCC; the other end of resistance R 56 and the positive pole of diode D31 and electrochemical capacitor C32 connect output and remove to be connected the star/triangle control switching circuit; the negative input end of operational amplifier IC2c; the positive input terminal of operational amplifier IC2c connects resistance R 57; resistance R 58; resistance R 59 and capacitor C 33; resistance R 57 other ends connect positive supply 18V; resistance R 58 is connected negative supply VCC with capacitor C 33 other ends; resistance R 59 other ends connect the anodal and operational amplifier IC2c output of electrochemical capacitor C34; electrochemical capacitor C34 negative pole connects negative supply VCC; operational amplifier IC2c output connects control relay J2 and J3 and LED 2 negative poles and LED 3 positive poles; LED 2 positive poles connect positive supply 18V through resistance R 61 with the control relay J2 other end; LED 3 negative poles connect negative supply VCC through resistance R 60 with the control relay J3 other end; operational amplifier IC2c output is time control relay J 3 adhesives control main circuit contact device KM3 adhesive motor triangle wiring running for high level; time control relay J 3 discharges control main circuit contact device KM2 adhesive motor star-star connections running to operational amplifier IC2c output for low level, and control relay J2 adhesive at this moment makes resistance R 62 and the accuracy of the multiplication factors assurance overload protection of resistance R 6 change operational amplifier IC1b in parallel and the normal conversion that star/triangle turns round.
The electromotor overload phase failure and unbalance protection of three-phase current circuit; the motor three-phase operating current that current transformer L1 summation current transformer L2 summation current transformer L3 detects is exported wherein one tunnel connection through the sampled signal processing and is protected initialization circuit to protect judgement to connect fault logic circuits and overload indicating circuit again through overload; another road connects the phase failure and unbalance protection of three-phase current circuit; connect the fault logic circuits and the phase failure and unbalance protection of three-phase current indicating circuit after judging again; fault logic circuits control control relay J1 adhesive when the overload phase failure and three-phase current unbalance fault occurring; control main circuit contact device KM1 outage, motor is out of service.
Digital display circuit is that sampled signal processing back connection A/D conversion connects digital display circuit demonstration motor operating current again through the digital circuit processing.
Claims (4)
1. star/triangle conversion energy-saving protector of digital readout electromotor comprises main control circuit or star/triangle economize on electricity change-over circuit or the electromotor overload phase failure and unbalance protection of three-phase current circuit or digital display circuit; it is characterized in that (V) (W) connection contactor (KM1) control of main control circuit three phase mains (U); three-phase main circuit after contactor (KM1) control runs through current transformer (L1) summation current transformer (L2) summation current transformer (L3) respectively; the lead-out wire (U1) and a lead-out wire (V2) and the lead-out wire (W3) that connect motor (M) winding then; lead-out wire (U1) is connected contactor (KM3) with a lead-out wire (V2) again with a lead-out wire (W3); contactor (KM3) control back connects tail lead-out wire (u1) and the tail lead-out wire (v2) and the tail lead-out wire (w3) of motor (M) winding; the tail lead-out wire (u1) of motor (M) winding is connected contactor (KM2) with tail lead-out wire (v2) again with tail lead-out wire (w3); connect the three-way short circuit of contactor (KM2) other end; motor (M) triangle operation during contactor (KM3) adhesive, motor (M) star operation during contactor (KM2) adhesive.
2. according to the said digital readout electromotor star of claim 1/angle conversion energy-saving protector; it is characterized in that star/triangle economize on electricity change-over circuit; when the long-time light running of motor, be automatically converted to the star power-saving running; current transformer (L1) summation current transformer (L2) summation current transformer (L3) end short circuit; the other end connects diode (D5); diode (D6); diode (D7); diode (D8); diode (D9); diode (D10) carries out rectification; after the rectification on signal resistance (R4) number of winning the confidence connect by resistance (R6); operational amplifier (IC1b); diode (D12) and dial-up (K1) and the amplification initialization circuit of dial-up (K2) with dial-up (K3) three figure places composition; be connected by operational amplifier (IC2a) with (R8) filtering one tunnel through electrochemical capacitor (C7); resistance (R35); resistance (R36); resistance (R37); electrochemical capacitor (C15); the run indicator circuit that light-emitting diode (LED1) is formed; another road connects the resistance (R39) and the diode (D29) of operating current identification circuit; the negative input end of the other end concatenation operation amplifier (IC2b) of resistance (R39) and diode (D29) and the negative pole of electrochemical capacitor (C31); the positive input terminal of operational amplifier (IC2b) connects diode (D28); diode (D30); resistance (R38); resistance (R53); resistance (R52); resistance (R54) and electrochemical capacitor (C30); diode (D28) other end connects the positive pole of light-emitting diode (LED); diode (D30); resistance (R38); resistance (R53) is connected negative supply (VCC) with electrochemical capacitor (C30) other end; the output of resistance (R54) other end concatenation operation amplifier (IC2b); electrochemical capacitor (C31) other end is connected to the output of operational amplifier (IC2b) through diode (D45); resistance (R52) other end connects positive supply (18V); the output of operational amplifier (IC2b) connects resistance (R55) and resistance (R56); resistance (R55) other end connects diode (D31); electrochemical capacitor (C32) negative pole connects negative supply (VCC); the other end of resistance (R56) and the positive pole of diode (D31) and electrochemical capacitor (C32) connect output and remove to be connected the star/triangle control switching circuit; the negative input end of operational amplifier (IC2c); the positive input terminal of operational amplifier (IC2c) connects resistance (R57); resistance (R58); resistance (R59) and electric capacity (C33); resistance (R57) other end connects positive supply (18V); resistance (R58) is connected negative supply (VCC) with electric capacity (C33) other end; resistance (R59) other end connects anodal and operational amplifier (IC2c) output of electrochemical capacitor (C34); electrochemical capacitor (C34) negative pole connects negative supply (VCC); operational amplifier (IC2c) output connects control relay (J2) and (J3) and light-emitting diode (LED2) negative pole and light-emitting diode (LED3) positive pole; light-emitting diode (LED2) is anodal to connect positive supply (18V) through resistance (R61) with control relay (J2) other end; light-emitting diode (LED3) negative pole connects negative supply (VCC) through resistance (R60) with control relay (J3) other end; control relay (J3) adhesive control main circuit contact device (KM3) adhesive motor triangle wiring running when operational amplifier (IC2c) output is high level; control relay (J3) discharged control main circuit contact device (KM2) adhesive motor star-star connection running when operational amplifier (IC2c) output was low level, and control relay (J2) adhesive at this moment makes the multiplication factor of resistance (R62) operational amplifier of change in parallel with resistance (R6) (IC1b) guarantee the accuracy of overload protection and the normal conversion of star/triangle running.
3. according to the said star/triangle conversion energy-saving protector of digital readout electromotor of claim 1; it is characterized in that the electromotor overload phase failure and unbalance protection of three-phase current circuit; the motor three-phase operating current that current transformer (L1) summation current transformer (L2) summation current transformer (L3) detects is exported wherein one tunnel connection through the sampled signal processing and is protected initialization circuit to protect judgement to connect fault logic circuits and overload indicating circuit again through overload; another road connects the phase failure and unbalance protection of three-phase current circuit; connect the fault logic circuits and the phase failure and unbalance protection of three-phase current indicating circuit after judging again; fault logic circuits control control relay (J1) adhesive when the overload phase failure and three-phase current unbalance fault occurring; control main circuit contact device (KM1) outage, motor is out of service.
4. according to the said said digital readout electromotor star of claim 1-angle conversion energy-saving protector, it is characterized in that digital display circuit is that sampled signal processing back connection A/D conversion connects digital display circuit demonstration motor operating current again through the digital circuit processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202668861U CN201733263U (en) | 2010-07-14 | 2010-07-14 | Digital-display electric motor star/triangle conversion energy-saving protector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202668861U CN201733263U (en) | 2010-07-14 | 2010-07-14 | Digital-display electric motor star/triangle conversion energy-saving protector |
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| CN201733263U true CN201733263U (en) | 2011-02-02 |
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| CN2010202668861U Expired - Fee Related CN201733263U (en) | 2010-07-14 | 2010-07-14 | Digital-display electric motor star/triangle conversion energy-saving protector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867335A (en) * | 2010-07-14 | 2010-10-20 | 蔡甫寒 | Star/triangle conversion energy-saving protector of digital readout electromotor |
| CN104569732A (en) * | 2014-12-29 | 2015-04-29 | 中国神华能源股份有限公司 | Winding head and tail end automatic testing device |
| CN105033126A (en) * | 2015-09-01 | 2015-11-11 | 浙江陀曼精密机械有限公司 | Energy-saving ring rolling machine |
| CN105071740A (en) * | 2015-09-01 | 2015-11-18 | 浙江陀曼精密机械有限公司 | Energy-saving circuit based on condition judgment |
| CN105081358A (en) * | 2015-09-01 | 2015-11-25 | 浙江陀曼精密机械有限公司 | Energy-saving lathe |
-
2010
- 2010-07-14 CN CN2010202668861U patent/CN201733263U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867335A (en) * | 2010-07-14 | 2010-10-20 | 蔡甫寒 | Star/triangle conversion energy-saving protector of digital readout electromotor |
| CN104569732A (en) * | 2014-12-29 | 2015-04-29 | 中国神华能源股份有限公司 | Winding head and tail end automatic testing device |
| CN104569732B (en) * | 2014-12-29 | 2017-07-11 | 中国神华能源股份有限公司 | Winding two ends automatic testing equipment |
| CN105033126A (en) * | 2015-09-01 | 2015-11-11 | 浙江陀曼精密机械有限公司 | Energy-saving ring rolling machine |
| CN105071740A (en) * | 2015-09-01 | 2015-11-18 | 浙江陀曼精密机械有限公司 | Energy-saving circuit based on condition judgment |
| CN105081358A (en) * | 2015-09-01 | 2015-11-25 | 浙江陀曼精密机械有限公司 | Energy-saving lathe |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20130714 |