CN201956946U - Motor auto voltage reducing starter box - Google Patents
Motor auto voltage reducing starter box Download PDFInfo
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- CN201956946U CN201956946U CN2010206600919U CN201020660091U CN201956946U CN 201956946 U CN201956946 U CN 201956946U CN 2010206600919 U CN2010206600919 U CN 2010206600919U CN 201020660091 U CN201020660091 U CN 201020660091U CN 201956946 U CN201956946 U CN 201956946U
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Abstract
The utility model relates to a voltage reducing starting device, in particular to a motor auto voltage reducing starter box. A main loop comprises a main motor auto voltage reducing starting circuit and a motor operation mode switching control circuit, wherein the input ends of the motor auto voltage reducing starting circuit are respectively used for being connected with a power supply of a three-phase alternating-current motor, and the input end of the motor operation mode switching control circuit is used for being serially connected between the U-phase and the W-phase of the power supply of the three-phase alternating-current motor. The voltage reducing starting device has the advantages that the device can ensure an autotransformer to be dropped out in time after the voltage reducing auto starting of the motor, the motor is automatically switched to a full-voltage operation mode and therefore the situations that autotransformer coils TM are electrified for a long time and are burned out can be effectively avoided.
Description
Technical field
The utility model relates to a kind of decompression starting device, particularly a kind of motor self-decoupling decompressioning starting box.
Background technology
For a long time, the threephase motor of industrial and mining enterprises is extensive use of self-decoupling decompressioning starting box and carries out decompression starting, the total head operation, and such kinetic energy that rises fully reduces too high starting current, alleviate impact, realize safety, the reliability service of electric equipment motor and electric power system.Yet; though traditional self-decoupling decompressioning starting box can be realized controlled function such as decompression starting, overload protection to motor preferably; but still exist some problems in actual use, break down easily, mainly have following problem: the human error during (1) manual switchover mode.The tradition starter box is provided with " manual " diverter switch, when adopting the manual switchover mode, because operating personnel's carelessness, after decompression starting is finished, fail in time to press the " RUN " button and switch to the total head operation, make autotransformer for a long time by the motor running current, so that burn; (2) device failure during automatic switching mode.When adopting automatic switching mode, some electric device damage because of control loop, break down as the time relay, after decompression starting is finished, because secondary circuit can not regular event, also just can not in time switch to total head and move, like this, autotransformer can not be withdrawed from, bear load current for a long time and burn out; (3) the primary circuit electric device damages.When the electric device of primary circuit such as starting contactor etc. damage, after starting is finished, though secondary circuit energy regular event (in most cases, because auxiliary contact do not reset, the locked regular event of secondary circuit) makes the coil blackout of this contactor, but it can not discharge after outage normally, and just its contact is seriously burnt out and causes sticking dead.
The utility model content
The purpose of this utility model provides a kind of operating reliability height, the motor self-decoupling decompressioning starting box that operation is simple.
A kind of motor self-decoupling decompressioning starting box, comprise motor self-coupling decompression starting circuit, motor operational mode control switching circuit, the input of motor self-coupling decompression starting circuit is respectively applied for the power supply that connects three phase alternating current motor, the input of motor operational mode control switching circuit is used to be concatenated between the U phase and W phase of three phase alternating current motor power supply, motor operational mode control switching circuit control connection motor self-coupling decompression starting circuit, described motor operational mode control switching circuit comprises first contactor, second contactor, first relay, second relay, the 3rd relay, very first time relay, second time relay, the coil of described first contactor, the normally opened contact of the 3rd relay, the normally-closed contact series connection of second relay is between the U of three phase alternating current motor power supply phase line and W phase line, the normally opened contact of first contactor, after the coil series connection of second time relay, be connected in parallel on the two ends of first contactor coil; After the on-delay cut-off switch series connection of the coil of the 3rd relay, second time relay, and be connected in the two ends of first contactor coil and the 3rd relay normally open contact series circuit, and the also coil of the coil of the 3rd relay and second time relay is connected; The coil series connection of the normally opened contact of first contactor, first relay is between the U of three phase alternating current motor power supply phase line and W phase line, and the normally opened contact of first relay is connected in parallel on the two ends of the first contactor normally opened contact; The normally opened contact of first relay, the normally-closed contact of second contactor, the coil series connection of very first time relay is between the U of three phase alternating current motor power supply phase and W phase, the on-delay closing contact of very first time relay, after the coil series connection of second relay, and be connected in the two ends of the series circuit of the normally-closed contact of second contactor and very first time relay coil, the normally opened contact of second relay, the normally-closed contact of first contactor, after the series connection of the coil of second contactor, and be connected in the two ends of the very first time relay power timing closing switch and the second relay coil series circuit; After the parallel connection of the on-delay closing contact of second time relay, the normally opened contact of second relay, be parallel to the two ends of very first time relay power timing closing contact, three interlock normally opened contacts of described second contactor are connected on respectively on the power supply of three phase alternating current motor; Described motor self-coupling decompression starting circuit comprises first contactor, self-coupling decompression transformer, and three of first contactor interlock normally opened contacts are serially connected between the tapped coil of the power supply of three phase alternating current motor and self-coupling decompression transformer; The three-phase signal line of drawing from the centre tap of self-coupling decompression transformer, wherein the output of the V phase V that is directly connected to the power supply of three phase alternating current motor goes up mutually, U mutually and W output mutually respectively with after two normally opened contacts of first contactor are connected, the U phase that is connected to the power supply of three phase alternating current motor goes up mutually with W.
Described motor operational mode control switching circuit also comprises the self-coupling decompression starting indicating member, the self-coupling decompression starting indicating member comprises the normally-closed contact of first relay, green indicating lamp, the normally opened contact of first relay, the normally-closed contact of second contactor, yellow indicator lamp, the normally opened contact of second contactor, red led, the normally-closed contact of described first relay, the green indicating lamp series connection is received between the U phase line and W phase line of three phase alternating current motor power supply, the normally opened contact of described first relay, the normally-closed contact of second contactor, after the yellow indicator lamp series connection, and be connected to the normally opened contact of first relay, the normally-closed contact of second contactor, the two ends of yellow indicator lamp series circuit, the normally opened contact of described second contactor, after the red led series connection, and be connected to the normally opened contact of first relay, the normally-closed contact of second contactor, the two ends of yellow indicator lamp series circuit.
Described motor motor operational mode control switching circuit also is provided with the 3rd normal open switch, and the 3rd normal open switch is connected in parallel on the two ends of very first time relay power timing closing contact.
Described motor self-decoupling decompressioning starting box also comprises protective circuit; described protective circuit comprises U, V, W three-phase current detection unit; the circuit of described U, V, W three-phase current detection unit is identical; include the normally opened contact of current transformer, thermal relay, second relay; current transformer is arranged on the corresponding phase line, two outputs of current transformer, the direct ground connection of an end; ground connection after the other end is connected with thermal relay, the normally opened contact of second relay is connected in parallel on the two ends of thermal relay.
Be serially connected with Current Display on the U phase current mutual inductor circuit in the described motor self-coupling decompression starting protective circuit.
Adopt above technical scheme can reach following technique effect:
Because the utility model adopts the self-coupling decompression starting and the total head operation of three interlock normally opened contacts control motors of three of first relay link normally opened contact and second relays, as long as press start button, motor is self-coupling decompression starting automatically, the time that reaches setting can automatically switch into the total head operation again, need not manually go again to switch, reliability is higher, operates also more simple.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams;
Fig. 2 is the circuit theory diagrams of the utility model motor operational mode control switching circuit.
Embodiment
As shown in Figure 1: the utility model comprises motor operational mode control switching circuit, motor self-coupling decompression starting circuit, the U that the input of motor operational mode control switching circuit is respectively applied for the power supply that connects three phase alternating current motor M mutually with W mutually, the three-phase input end of motor self-coupling decompression starting circuit is respectively applied for the power supply that connects three phase alternating current motor M, motor operational mode control switching circuit control self-coupling decompression starting circuit.
As shown in Figure 2: described motor operational mode control switching circuit comprises the first contactor 1KM, the second contactor 2KM, the first relay 1KA, the second relay 2KA, the 3rd relay 3KA, very first time relay 1KT, second time relay 2KT.
Wherein, after the normally opened contact 3KA1 of the coil of the first contactor 1KM, the 3rd relay 3KA, the normally-closed contact 2KA4 of the second relay 2KA series connection, be connected between the U phase line and W phase line of power supply of three phase alternating current motor M; The normally opened contact 1KM4 of the first contactor 1KM is with after the coil of second time relay 2KT is connected, and is connected to the two ends of the series circuit of the second normal open switch 2SB and the first contactor 1KM coil; After the on off delay break contact 2KT1 series connection of the coil of the 3rd relay 3KA and second time relay 2KT, be parallel to the two ends of series circuit of the normally opened contact 3KA1 of the coil of the first contactor 1KM and the 3rd relay 3KA, and the coil of the 3rd relay 3KA also is in parallel the connection with the coil of second time relay 2KT.
The normally opened contact 1KM5 of the first contactor 1KM is with after the coil of the first relay 1KA is connected, be connected between the U phase line and W phase line of three-way alternating current machine M power supply, the normally opened contact 1KA3 of the first relay 1KA is parallel to the two ends of the normally opened contact 1KM4 of the first contactor 1KM.
The normally opened contact 1KA4 of the first relay 1KA, second connects the coil series connection of normally-closed contact 2KM4, the very first time relay 1KT of contactor 2KM and receives between the U phase line and W phase line of three phase alternating current motor M power supply, after the on-delay closing contact 1KT1 of very first time relay 1KT, the series connection of the second relay 2KA coil, be parallel to the two ends of normally closed switch 2KM4 and the very first time relay 1KT coil series circuit of the second contactor 2KM; After the series connection of the normally-closed contact 1KM6 of the normally opened contact 2KA6 of the second relay 2KA, the first contactor 1KM, the second contactor 2KM coil, be parallel to the two ends of normally closed switch 2KM4 and the very first time relay 1KT coil series circuit of the second contactor 2KM; The on-delay closing contact 2KT2 of second time relay 2KT, the normally opened contact 2KA5 of the second relay 2KA are parallel to the two ends of the on-delay closing contact 1KT1 of very first time relay 1KT respectively.
Described motor self-coupling decompression starting circuit comprises first contactor, self-coupling decompression transformer TM.Three of first contactor 1KM interlock normally opened contact 1KM1 are serially connected between the tapped coil of the power supply of three phase alternating current motor M and self-coupling decompression transformer TM; The three-phase signal line of drawing from the tapped coil of self-coupling decompression transformer TM 60%, wherein the V V that directly is connected on three phase alternating current motor M power supply mutually goes up mutually, and U goes up with W at the U of three phase alternating current motor M power supply with two normally opened contact 1KM3 and the 1KM2 series connection of the first contactor 1KM respectively mutually mutually mutually with W mutually.
Described motor operational mode control switching circuit also comprises motor self-coupling decompression starting indicating member.Motor self-coupling decompression starting indicating member comprises normally-closed contact 2KM2, yellow indicator lamp HY, normally opened contact 2KM3, the red led HR of the second contactor 2KM of normally opened contact 1KA2, the second contactor 2KM of normally-closed contact 1KA1, green indicating lamp HG, the first relay 1KA of the first relay 1KA, and the normally-closed contact 1KA1 of the first relay 1KA connects with green indicating lamp HG and receives between the U phase line and W phase line of three phase alternating current motor M power supply; After the normally-closed contact 2KM2 of the normally opened contact of the first relay 1KA, the second contactor 2KM, the yellow indicator lamp HY series connection, be connected in parallel on the two ends of normally-closed contact 1KA1 and the green indicating lamp HG series circuit of the first relay 1KA; The normally opened contact 2KM3 of the second contactor 2KM is connected in parallel on the two ends of normally-closed contact 1KA1 and the green indicating lamp HG series circuit of the first relay 1KA with after red led HR connects.
In the described motor self-coupling decompression starting indicating member warning circuit is installed also, described warning circuit comprises resistance R and alarm DF, and the series circuit of resistance R and alarm DF is connected in parallel on the two ends of yellow indicator lamp HY.
U phase line, the W phase line of described motor operational mode control switching circuit are provided with fuse FU1, FU2.
In addition, in motor operational mode control switching circuit, also be provided with the normally-closed contact FR1 of the first normally closed switch 1SB, the second normal open switch 2SB, the 3rd normal open switch 3SB, thermal relay FR.The normally-closed contact FR1 of described first normally closed switch 1SB and thermal relay FR is serially connected in respectively on the U phase line and W phase line of three phase alternating current motor M power supply, the 3rd normal open switch 3SB, the 3rd normal open switch 3SB are connected in parallel on the two ends of the on-delay closing contact 1KT1 of very first time relay 1KT.
The novel protective circuit that also comprises of this use.Described protective circuit comprises the current detecting unit of three phase mains, U phase current detecting unit comprises the normally-closed contact 2KA1 of current transformer LHu, the first thermal relay 1FR, Current Display PA1, the second relay 2KA, U phase current mutual inductor LHu is arranged on the U phase line of three phase alternating current motor M power supply, the two output terminations of U phase current mutual inductor LHu, the direct ground connection of one end, the other end ground connection behind the first thermal relay 1FR and the Current Display PA1 of connecting, the normally-closed contact 2KA1 of the second relay 2KA is connected in parallel on the two ends of the first thermal relay 1FR; V phase current detecting unit comprises the normally-closed contact 2KA2 of current transformer LHv, the second thermal relay 2FR, the second relay 2KA, V phase current mutual inductor LHv is arranged on the V phase line of three phase alternating current motor M power supply, the two output terminations of V phase current mutual inductor LHv, the direct ground connection of one end, the other end ground connection behind the second thermal relay 2FR of connecting, the normally-closed contact 2KA2 of the second relay 2KA is connected in parallel on the two ends of the second thermal relay 2FR; W phase current detecting unit comprises the normally-closed contact 2KA3 of current transformer LHw, the 3rd thermal relay 3FR, the second relay 2KA, W phase current mutual inductor LHw is arranged on the W phase line of three phase alternating current motor M power supply, the two output terminations of W phase current mutual inductor LHw, the direct ground connection of one end, the other end ground connection behind the 3rd thermal relay 3FR of connecting, the normally-closed contact 2KA3 of the second relay 2KA is connected in parallel on the two ends of the 3rd thermal relay 3FR;
The course of work is as follows: as closed master switch QS, the green indicating lamp HG in the starting indicating circuit in the motor self-decoupling decompressioning starting box electric control loop is bright.(the second normal open switch 2SB is for touching the breakaway-element button for closed second switch 2SB, when being depressed, its connection, promptly disconnect after unclamping), the coil electricity of the 3rd relay 3KA, the connection of its normally opened contact 3KA1, make the coil of the first contactor 1KM and the coil electricity of second time relay 2KT, three interlock normally opened contact 1KM1 adhesive of the first contactor 1KM, two the normally opened contact 1KM2 of the first contactor 1KM and also adhesive of 1KM3 simultaneously, the 380V power supply is drawn through 60% tap of self-coupling decompression transformer, be added on the motor, make motor under decompression state, begin starting.The normally opened contact 1KM5 adhesive of the first contactor 1KM, connected the coil of the first relay 1KA, make the coil electricity of the first relay 1KA, normally opened contact 1KA2, the 1KA3 of the first relay 1KA, 1KA4 connect, and the normally-closed contact 1KA1 of the first relay 1KA disconnects.Yellow indicator lamp HY is connected in the adhesive of the normally opened contact 1KA2 of the first relay 1KA; The adhesive of the normally opened contact 1KA3 of the first relay 1KA keeps the coil of the first relay 1KA to be in the state of energising all the time; The adhesive of the first relay 1KA normally opened contact 1KA4 makes very first time relay 1KT coil electricity, enters time status.
When reaching setting time to very first time relay 1KT, the motor self-coupling decompression starting is finished.Detailed process is: the energising of very first time relay 1KT coil is connected the on-delay closing contact 1KT1 time-delay of very first time relay 1KT, the coil of the second relay 2KA is got, the normally opened contact 2KA5 of the second relay 2KA, 2KA6 adhesive, the normally-closed contact 2KA4 of the second relay 2KA disconnects.The normally opened contact 2KA5 adhesive of the second relay 2KA makes the coil of the second relay 2KA keep the state of switching on always; And the normally-closed contact 2KA4 of the second relay 2KA disconnects, and makes the coil losing electricity of the first contactor 1KM, and the normally opened contact of the first contactor 1KM all disconnects, and all normally-closed contacts of the first contactor 1KM recover closure state.Like this, because of the connection of the normally-closed contact 1KM6 of the first contactor 1KM, make the coil electricity of the second contactor 2KM, three interlocks of the second contactor 2KM are often opened main contacts 2KM1 and are connected, and three-phase alternating-current motor M changes the operation of 380V full voltage over to.Simultaneously, red led HR is connected in the also adhesive of normally opened contact 2KM3 of the second contactor 2KM.
In addition, after pressing the second normal open switch 2SB, the coil that causes second time relay 2KT gets the electric time-delay time status that enters, by the people is to adjust its delay value greater than very first time relay 1KT delay value, so just kept after the on-delay closing contact 1KT1 of very first time relay 1KT moves in advance, second time relay 2KT need not deferred action also because of power supply is cut off.But when very first time relay 1KT breaks down, can not in the time of adjusting, move when making motor change the total head operation, behind the setting value Deng second time relay 2KT that delays time, move the coil losing electricity that causes the 3rd relay 3KA by the on-delay closing contact 2KT1 of second time relay 2KT, and then the coil that cuts off the first contactor 1KM, make the normally-closed contact 1KM6 closure of the first contactor 1KM.Connect the coil of the second relay 2KA then again by the on-delay closing contact 2KT2 of second time relay 2KT, make the normally opened contact 2KA6 closure of the second relay 2KA.Because the normally-closed contact 1KM6 of the first contactor 1KM and the normally opened contact 2KA6 of the second relay 2KA are all closed, make the second contactor 2KM coil get, three interlock normally opened contact 2KM1 closures of the second contactor 2KM, autotransformer can be withdrawed from the setting time of second time relay 2KT reliably, and transfer motor to running status by starting state.
Certainly, the time-delay make contact of second time relay 2KT self adhesive in time that differs surely sometimes, at this moment, although circuit can not in time transfer running status to, it can guarantee that the 3rd relay 3KA in time disconnects, and self coupling coil TM can in time be withdrawed from reliably.In addition, it can also be when the second relay 2KA fault be malfunctioning, guarantee that the first contactor 1KM dead electricity disconnects, and in time withdraws from autotransformer, thereby has avoided self coupling coil TM long-term charged and burnt effectively.
Claims (5)
1. motor self-decoupling decompressioning starting box, comprise motor self-coupling decompression starting circuit, motor operational mode control switching circuit, the input of motor self-coupling decompression starting circuit is respectively applied for the power supply that connects three phase alternating current motor, the input of motor operational mode control switching circuit is used to be concatenated between the U phase and W phase of three phase alternating current motor power supply, motor operational mode control switching circuit control connection motor self-coupling decompression starting circuit, it is characterized in that: described motor operational mode control switching circuit comprises first contactor, second contactor, first relay, second relay, the 3rd relay, very first time relay, second time relay, the coil of described first contactor, the normally opened contact of the 3rd relay, the normally-closed contact series connection of second relay is between the U of three phase alternating current motor power supply phase line and W phase line, the normally opened contact of first contactor, after the coil series connection of second time relay, be connected in parallel on the two ends of first contactor coil; After the on-delay cut-off switch series connection of the coil of the 3rd relay, second time relay, and be connected in the two ends of first contactor coil and the 3rd relay normally open contact series circuit, and the also coil of the coil of the 3rd relay and second time relay is connected; The coil series connection of the normally opened contact of first contactor, first relay is between the U of three phase alternating current motor power supply phase line and W phase line, and the normally opened contact of first relay is connected in parallel on the two ends of the first contactor normally opened contact; The normally opened contact of first relay, the normally-closed contact of second contactor, the coil series connection of very first time relay is between the U of three phase alternating current motor power supply phase and W phase, the on-delay closing contact of very first time relay, after the coil series connection of second relay, and be connected in the two ends of the series circuit of the normally-closed contact of second contactor and very first time relay coil, the normally opened contact of second relay, the normally-closed contact of first contactor, after the series connection of the coil of second contactor, and be connected in the two ends of the very first time relay power timing closing switch and the second relay coil series circuit; After the parallel connection of the on-delay closing contact of second time relay, the normally opened contact of second relay, be parallel to the two ends of very first time relay power timing closing contact, three interlock normally opened contacts of described second contactor are connected on respectively on the power supply of three phase alternating current motor; Described motor self-coupling decompression starting circuit comprises first contactor, self-coupling decompression transformer, and three of first contactor interlock normally opened contacts are serially connected between the tapped coil of the power supply of three phase alternating current motor and self-coupling decompression transformer; The three-phase signal line of drawing from the centre tap of self-coupling decompression transformer, wherein the output of the V phase V that is directly connected to the power supply of three phase alternating current motor goes up mutually, U mutually and W output mutually respectively with after two normally opened contacts of first contactor are connected, the U phase that is connected to the power supply of three phase alternating current motor goes up mutually with W.
2. motor self-decoupling decompressioning starting box as claimed in claim 1, it is characterized in that: described motor operational mode control switching circuit also comprises the self-coupling decompression starting indicating member, the self-coupling decompression starting indicating member comprises the normally-closed contact of first relay, green indicating lamp, the normally opened contact of first relay, the normally-closed contact of second contactor, yellow indicator lamp, the normally opened contact of second contactor, red led, the normally-closed contact of described first relay, the green indicating lamp series connection is received between the U phase line and W phase line of three phase alternating current motor power supply, the normally opened contact of described first relay, the normally-closed contact of second contactor, after the yellow indicator lamp series connection, and be connected to the normally opened contact of first relay, the normally-closed contact of second contactor, the two ends of yellow indicator lamp series circuit, the normally opened contact of described second contactor, after the red led series connection, and be connected to the normally opened contact of first relay, the normally-closed contact of second contactor, the two ends of yellow indicator lamp series circuit.
3. motor self-decoupling decompressioning starting box as claimed in claim 2 is characterized in that: described motor motor operational mode control switching circuit also is provided with the 3rd normal open switch, and the 3rd normal open switch is connected in parallel on the two ends of very first time relay power timing closing contact.
4. as claim 1 or 2 or 3 described motor self-decoupling decompressioning starting box; it is characterized in that: described motor self-decoupling decompressioning starting box also comprises protective circuit; described protective circuit comprises U; V; W three-phase current detection unit; described U; V; the circuit of W three-phase current detection unit is identical; include current transformer; thermal relay; the normally opened contact of second relay; current transformer is arranged on the corresponding phase line; two outputs of current transformer; the direct ground connection of one end; ground connection after the other end is connected with thermal relay, the normally opened contact of second relay is connected in parallel on the two ends of thermal relay.
5. motor self-decoupling decompressioning starting box as claimed in claim 4 is characterized in that: be serially connected with Current Display on the U phase current mutual inductor circuit in the described motor self-coupling decompression starting protective circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206600919U CN201956946U (en) | 2010-12-15 | 2010-12-15 | Motor auto voltage reducing starter box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206600919U CN201956946U (en) | 2010-12-15 | 2010-12-15 | Motor auto voltage reducing starter box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201956946U true CN201956946U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206600919U Expired - Fee Related CN201956946U (en) | 2010-12-15 | 2010-12-15 | Motor auto voltage reducing starter box |
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| Country | Link |
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| CN (1) | CN201956946U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570932A (en) * | 2010-12-15 | 2012-07-11 | 河南省电力公司许昌供电公司 | Self-coupling decompression start box for motor |
| CN105871290A (en) * | 2016-05-24 | 2016-08-17 | 江西工埠机械有限责任公司 | Series connection and parallel connection switching device for windings of novel permanent magnet synchronous motor |
-
2010
- 2010-12-15 CN CN2010206600919U patent/CN201956946U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570932A (en) * | 2010-12-15 | 2012-07-11 | 河南省电力公司许昌供电公司 | Self-coupling decompression start box for motor |
| CN102570932B (en) * | 2010-12-15 | 2015-09-16 | 河南省电力公司许昌供电公司 | A kind of motor auto voltage reducing starter box |
| CN105871290A (en) * | 2016-05-24 | 2016-08-17 | 江西工埠机械有限责任公司 | Series connection and parallel connection switching device for windings of novel permanent magnet synchronous motor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 288 Xuchang City, Henan province 461000 City Road Patentee after: XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Address before: No. 288 Xuchang City, Henan province 461000 City Road Patentee before: Xuchang Power Supply Company of Henan Electric Power Co. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20131203 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Address before: No. 288 Xuchang City, Henan province 461000 City Road Patentee before: XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20181215 |