CN102790377A - Safety device and motor - Google Patents
Safety device and motor Download PDFInfo
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- CN102790377A CN102790377A CN201110139349XA CN201110139349A CN102790377A CN 102790377 A CN102790377 A CN 102790377A CN 201110139349X A CN201110139349X A CN 201110139349XA CN 201110139349 A CN201110139349 A CN 201110139349A CN 102790377 A CN102790377 A CN 102790377A
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Abstract
The invention relates to a safety device and a motor. The safety device comprises a two-way controllable switch group, a controller and a driving circuit, wherein the two-way controllable switch group is connected to tail ends of a plurality of phase windings in a permanent magnet exciting motor in series; the controller is used for outputting an electrical signal for cutting off one of two phase windings when any two phase windings in the phase windings are in short circuit; the driving circuit is connected with the two-way controllable switch group and the controller and is used for driving a two-way controllable switch connected in series to the tail end of one phase winding in the two-way controllable switch group when the electrical signal from the controller is received so as to cut off a connection between one phase winding and other phase windings in the multiple phase windings. According to the safety device, the operation reliability of the permanent magnet exciting motor can be improved.
Description
Technical field
The present invention relates to motor, relate in particular to the safety device of the operational reliability that is used to improve the motor that adopts the permanent magnet excitation.
Background technology
Permagnetic synchronous motor is applied to every field more and more widely with its excellent characteristic (for example, volume is little, operational efficiency is high, power factor high), therefore requires also increasingly high to permagnetic synchronous motor and control system reliability of operation thereof.
Because permagnetic synchronous motor adopts permanent magnet excitation, so, still have bigger winding induced potential in each phase winding of permagnetic synchronous motor even disconnecting external is controlled power supply in the running.In this case, when being short-circuited (particularly winding head end phase fault) fault between each phase winding of permagnetic synchronous motor, its short circuit current is very big, causes the serious danger of generating heat even possibly cause the permanent degaussing of permanent magnet of permagnetic synchronous motor.Adopt the main circuit topology of half-bridge inverter power supply can't solve the danger that short circuit caused between the permagnetic synchronous motor phase winding at present; Even because stopped the phase winding power supply that half-bridge inverter is short-circuited in permagnetic synchronous motor, the induced potential that produces in the phase winding that is short-circuited in the permagnetic synchronous motor still can form very big short circuit current through first continuous mutually linking to each other with the tail tail of short circuit.
Summary of the invention
Consider the problems referred to above, one object of the present invention is to provide a kind of safety device, and it can improve the operational reliability of the motor that adopts the permanent magnet excitation.
Another object of the present invention is to provide a kind of motor with this safety device that adopts the permanent magnet excitation.
A kind of safety device according to the embodiment of the invention comprises: two-way gate-controlled switch group, and it is connected on the tail end of a plurality of phase windings in the motor that adopts the permanent magnet excitation; Controller is used for when being short-circuited between any two phase windings of said a plurality of phase windings, and output is used to cut off the signal of telecommunication of one of them phase winding of said two phase windings; And; Drive circuit; It is connected with said controller with said two-way gate-controlled switch group; Be used for when the said signal of telecommunication received from said controller, the two-way gate-controlled switch that drives the tail end that is connected on said one of them phase winding in the said two-way gate-controlled switch group breaks off, to cut off being connected of other phase winding in said one of them phase winding and the said a plurality of phase windings.
A kind of motor that adopts the permanent magnet excitation according to the embodiment of the invention comprises: permanent magnet; A plurality of phase windings; Two-way gate-controlled switch group, it is connected on the tail end of said a plurality of phase windings; Controller is used for when being short-circuited between any two phase windings of said a plurality of phase windings, and output is used to cut off the signal of telecommunication of one of them phase winding of said two phase windings; And; Drive circuit; It is connected with said controller with said two-way gate-controlled switch group; Be used for when the said signal of telecommunication received from said controller, the two-way gate-controlled switch that drives the tail end that is connected on said one of them phase winding in the said two-way gate-controlled switch group breaks off, to cut off being connected of other phase winding in said one of them phase winding and the said a plurality of phase windings.
Because at the tail end of the phase winding of the motor that the adopts the permanent magnet excitation two-way gate-controlled switch of having connected; And when being short-circuited between any two phase windings; The two-way gate-controlled switch that the tail end of one of them phase winding of these two phase windings is connected is driven disconnection; Therefore, cut off being connected of this one of them phase winding and other phase winding, thereby improved the operational reliability of the motor that adopts the permanent magnet excitation.
Description of drawings
Further feature of the present invention, characteristics, advantage and benefit will become more obvious through the detailed description below in conjunction with accompanying drawing.Wherein:
Fig. 1 shows the sketch map according to the safety device of first embodiment of the invention;
It shows the sketch map according to the sub-drive circuit of one embodiment of the invention Fig. 2;
Fig. 3 shows the sketch map according to the sub-drive circuit of another embodiment of the present invention;
Fig. 4 a shows the spatial distribution sketch map according to four phase windings of four phase permagnetic synchronous motors of one embodiment of the invention;
Fig. 4 b shows the spatial distribution sketch map according to the residue phase winding of four phase permagnetic synchronous motors of one embodiment of the invention; And
Fig. 5 shows the sketch map according to the sub-drive circuit of further embodiment of this invention.
Embodiment
Below, will combine accompanying drawing is that example is described each embodiment of the present invention in detail with four phase permagnetic synchronous motors.
(first embodiment)
In the present embodiment, four phase permagnetic synchronous motors comprise permanent magnet, four phase windings and safety device.
With reference now to Fig. 1,, it shows the sketch map according to the safety device of first embodiment of the invention.As shown in Figure 1, safety device 10 comprises two-way gate-controlled switch group 100, drive circuit 200 and controller 300.
Wherein, two-way gate-controlled switch group 100 comprises three two-way gate-controlled switch k
B, k
CAnd k
D, it is connected on the tail end of three phase windings of this four phases permagnetic synchronous motor.Wherein, two-way gate-controlled switch k
BBe connected on the tail end of B phase winding, two-way gate-controlled switch k
CBe connected on the tail end of C phase winding, and two-way gate-controlled switch k
DBe connected on the tail end of D phase winding.
For example, when being short-circuited between A phase winding and the B phase winding, controller 300 is used to cut off the signal of telecommunication of B phase winding to drive circuit 200 outputs; When being short-circuited between A phase winding and the C phase winding, controller 300 is used to cut off the signal of telecommunication of C phase winding to drive circuit 200 outputs; When being short-circuited between A phase winding and the D phase winding, controller 300 is used to cut off the signal of telecommunication of D phase winding to drive circuit 200 outputs; When being short-circuited between B phase winding and the C phase winding, controller 300 is used to cut off the signal of telecommunication of B or C phase winding to drive circuit 200 outputs; When being short-circuited between B phase winding and the D phase winding, controller 300 is used to cut off the signal of telecommunication of B or D phase winding to drive circuit 200 outputs; And when being short-circuited between C phase winding and the D phase winding, controller 300 is used to cut off the signal of telecommunication of C or D phase winding to drive circuit 200 outputs.
Can know by top description; Because at the tail end of the phase winding of the four phase permagnetic synchronous motors two-way gate-controlled switch of having connected; And when being short-circuited between any two phase windings, the two-way gate-controlled switch that the tail end of one of them phase winding of these two phase windings is connected is driven disconnection, therefore; Cut off being connected of this one of them phase winding and other phase winding, thereby improved the operational reliability of this four phases permagnetic synchronous motor.
Included two-way gate-controlled switch k in the two-way gate-controlled switch group 100
B, k
CAnd k
DEach can be bidirectional thyristor or inverse parallel unidirectional thyristor.
At two-way gate-controlled switch k
B, k
CAnd k
DBe under the situation of bidirectional thyristor, drive circuit 200 comprises and is used to drive two-way gate-controlled switch k
B, k
CAnd k
DIn each sub-drive circuit, promptly drive circuit 200 comprises and is used to drive two-way gate-controlled switch k
BSub-drive circuit, be used to drive two-way gate-controlled switch k
CSub-drive circuit be used to drive two-way gate-controlled switch k
DSub-drive circuit.
With reference now to Fig. 2,, it shows the sketch map according to the sub-drive circuit of one embodiment of the invention.As shown in Figure 2, sub-drive circuit 210 is connected to bidirectional thyristor T
21To drive bidirectional thyristor T
21Closure or disconnection.Sub-drive circuit 210 comprises photoelectric coupled device T
22And resistance R
21, R
22
Wherein, photoelectric coupled device T
22Comprise light-sensitive device and the luminescent device that is connected to controller 300.
Photoelectric coupled device T
22An end of light-sensitive device be connected to as two-way gate-controlled switch k
B, k
COr k
DBidirectional thyristor T
21The control utmost point and resistance R
21A wherein end, photoelectric coupled device T
22The other end of light-sensitive device be connected to resistance R
22A wherein end, resistance R
21The other end and resistance R
22The other end be connected respectively to bidirectional thyristor T
21Anode and negative electrode or bidirectional thyristor T
21Negative electrode and anode.
When controller 300 is used to cut off bidirectional thyristor T to drive circuit 200 outputs
21The signal of telecommunication I of the phase winding of being connected
FThe time, with bidirectional thyristor T
21The sub-drive circuit 210 that connects will receive this signal of telecommunication I
FAnd this signal of telecommunication I
FFlow through photoelectric coupled device T
22Luminescent device.As this signal of telecommunication I
FFlow through photoelectric coupled device T
22Luminescent device the time, photoelectric coupled device T
22Luminescent device carry out luminous.As photoelectric coupled device T
22Luminescent device when luminous, photoelectric coupled device T
22The light-sensitive device conducting, photoelectric coupled device T
22Light-sensitive device and resistance R
21, R
22The loop that constitutes has electric current to pass through, thus bidirectional thyristor T
21The control utmost point be provided Control current I
G, cause bidirectional thyristor T
21Break off, this makes bidirectional thyristor T
21The phase winding of being connected was cut off with being connected of other winding.
In addition, stop to be used to cut off bidirectional thyristor T at controller 300 to drive circuit 200 outputs
21The signal of telecommunication I of the phase winding of being connected
FAfter, do not have the signal of telecommunication and flow through photoelectric coupled device T
22Luminescent device, photoelectric coupled device T
22Luminescent device can be not luminous, photoelectric coupled device T
22Not conducting of light-sensitive device, photoelectric coupled device T
22Luminescent device and resistance R
21, R
22The loop that constitutes does not have electric current to pass through, bidirectional thyristor T
21The control utmost point be not provided Control current I
G, bidirectional thyristor T
21Conducting, thereby bidirectional thyristor T
21The phase winding of being connected can be connected with other winding.
At two-way gate-controlled switch k
B, k
CAnd k
DBe respectively under the situation of inverse parallel unidirectional thyristor, drive circuit 200 comprises and is used to drive two-way gate-controlled switch k
B, k
CAnd k
DIn each sub-drive circuit, promptly drive circuit 200 comprises and is used to drive two-way gate-controlled switch k
BSub-drive circuit, be used to drive two-way gate-controlled switch k
CSub-drive circuit be used to drive two-way gate-controlled switch k
DSub-drive circuit.
With reference now to Fig. 3,, it shows the sketch map according to the sub-drive circuit of another embodiment of the present invention.As shown in Figure 3, sub-drive circuit 230 is connected to inverse parallel unidirectional thyristor T
3To drive inverse parallel unidirectional thyristor T
3Closure or disconnection.Sub-drive circuit 230 comprises pulse transformer TG and diode D
31, D
32, D
33, D
34
Wherein, pulse transformer TG comprises first secondary coil, second subprime coil and is connected to the primary coil of controller 300.
One end of first secondary coil of pulse transformer TG is connected to diode D
33Anode and as two-way gate-controlled switch k
B, k
COr k
DThe inverse parallel unidirectional thyristor in the first unidirectional thyristor T
31Negative electrode, the other end of first secondary coil of pulse transformer TG is connected to diode D
31Anode, diode D
33Negative electrode and diode D
31Negative electrode link together and be connected to the first unidirectional thyristor T
31The control utmost point.
One end of the second subprime coil of pulse transformer TG is connected to diode D
34Anode and the second unidirectional thyristor T of inverse parallel unidirectional thyristor
32Negative electrode, the other end of the second subprime coil of pulse transformer TG is connected to diode D
32Anode, diode D
34Negative electrode and diode D
32Negative electrode link together and be connected to the second unidirectional thyristor T
32The control utmost point.
When controller 300 is used to cut off inverse parallel unidirectional thyristor T to drive circuit 200 outputs
3The signal of telecommunication I of the high-frequency impulse form of the phase winding of being connected
FThe time, with inverse parallel unidirectional thyristor T
3The sub-drive circuit 230 that connects will receive this signal of telecommunication I
FAnd this signal of telecommunication I
FWill flow through the primary coil of pulse transformer TG.As this signal of telecommunication I
FWhen flowing through the primary coil of pulse transformer TG, first secondary coil and the second subprime coil of pulse transformer TG produce induced current respectively, and the induced current of this generation passes through diode D respectively
31And D
32As Control current I
G1And I
G2Be input to the first unidirectional thyristor T respectively
31With the second unidirectional thyristor T
32The control utmost point, cause inverse parallel unidirectional thyristor T
3In the first unidirectional thyristor T
31With the second unidirectional thyristor T
32Break off, this makes inverse parallel unidirectional thyristor T
3The phase winding of being connected was cut off with being connected of other winding.
In addition, stop to be used to cut off inverse parallel unidirectional thyristor T at controller 300 to drive circuit 200 outputs
3The signal of telecommunication I of the high-frequency impulse form of the phase winding of being connected
FAfter, with inverse parallel unidirectional thyristor T
3The sub-drive circuit 230 that connects can not receive this signal of telecommunication I
FThereby, there is not the primary coil of electric signal streams extra pulse transformer TG, first secondary coil and the second subprime coil of pulse transformer TG do not produce induced current, thereby just do not have Control current to be input to the first unidirectional thyristor T
31With the second unidirectional thyristor T
32The control utmost point, cause inverse parallel unidirectional thyristor T
3In the first unidirectional thyristor T
31With the second unidirectional thyristor T
32Closure, thereby inverse parallel unidirectional thyristor T
3The phase winding of being connected can be connected with other winding.
(second embodiment)
Before not being short-circuited between each phase winding of permagnetic synchronous motor, all spatial distributions of participating in the phase winding of work are symmetrical, and therefore, the PHASE DISTRIBUTION of the phase current of each phase winding also is symmetrical, and the composite magnetic power of each phase winding is circular rotating magnetic potential.After one of them phase winding that is short-circuited and is short-circuited between the phase winding of permagnetic synchronous motor was cut off, the spatial distribution of remaining phase winding is symmetry no longer.In this case, if still to the constant phase current of remaining each phase winding input, then the composite magnetic power of remaining each phase winding will be oval rotating magnetic potential, and this will reduce the output torque and the active power of permagnetic synchronous motor significantly.
For this reason; In the present embodiment; On the basis of first embodiment; The controller 300 of safety device 10 further equals the principle of the composite magnetic power of all phase windings before being short-circuited according to the composite magnetic power of remaining each phase winding, calculate the new current value of the phase current of remaining each phase winding, and impels external power source to import phase current according to the new current value of this calculating to remaining each phase winding.
Below, be that example is launched to describe in detail still with four phase permagnetic synchronous motors.
With reference now to Fig. 4 a,, it shows four phase winding W of four phase permagnetic synchronous motors
A-W
DThe spatial distribution sketch map.Shown in Fig. 4 a, four phase windings differ 90 ° on spatial distribution.Identical with the spatial distribution of four phase windings, the phase place of the phase current of four phase windings also is to be symmetrically distributed with the mode that differs 90 °.The phase current i of four phase windings
A, i
B, i
CAnd i
DCan use equality (1) to represent.
In equality (1), I
mThe amplitude of representing the phase current of each phase winding.
Four magnetic potential F that phase winding produces separately
A, F
B, F
CAnd F
DCan use equality (2) to represent.
The composite magnetic power F of four phase windings
sCan use equality (3) to represent.
F
s＝F
A+F
B+F
C+F
D＝2kN
sI
m(cosωtcosθ+sinωtsinθ) (3)
When between wherein two phase windings in four phase windings during failed because, a phase winding in two phase windings of this failed because is cut off, thereby four phase permagnetic synchronous motors have become the three-phase operation pattern.
For the convenience of describing, hypothesis D phase winding has been cut off below, and the only remaining A phase winding of four phase permagnetic synchronous motors, B phase winding and these three phase windings of C phase winding carry out work.These three phase windings magnetic potential separately can use equality (4) to represent.
The composite magnetic power of these three phase windings can use equality (5) to represent.
F′
s＝kN
s(i′
A-i′
C)cosθ+kN
si′
Bsinθ (5)
Find out remaining three the phase winding W of four phase permagnetic synchronous motors from Fig. 4 b
A-W
CSpatial distribution be asymmetric.In this case, need redistribute the amplitude and the phase place of the phase current of these three phase windings, just can reach the operational effect of four phase permagnetic synchronous motors before being short-circuited.
For this reason, make the composite magnetic power of remaining three phase windings equal the composite magnetic power of all four phase windings before being short-circuited, can calculate the new current value of remaining three phase windings phase current separately, shown in equality (6).
The effect of the controller 300 of safety device 10 is, calculates the new current value of the phase current of remaining each phase winding according to equality (6), and impels external power source to import phase current according to the new current value of this calculating to remaining each phase winding.
Those skilled in the art are to be understood that; According to top disclosed content, when remaining three phase windings are A phase winding, B phase winding and D phase winding, perhaps A phase winding, C phase winding and D phase winding; Perhaps when B phase winding, C phase winding and D phase winding; The equality of new current value that is used to calculate the phase current of these remaining phase windings is easy to expect, therefore, no longer lists the equality of the new current value of the phase current that is used to calculate these remaining phase windings at this.
Other embodiment
Though it will be appreciated by those skilled in the art that among the embodiment that describes in the above, at two-way gate-controlled switch k
B, k
CAnd k
DBe under the situation of inverse parallel unidirectional thyristor, sub-drive circuit comprises that pulse transformer TG is used to drive the Control current that the inverse parallel unidirectional thyristor breaks off with generation, yet the present invention is not limited thereto.
In some other embodiment of the present invention, at two-way gate-controlled switch k
B, k
CAnd k
DBe under the situation of inverse parallel unidirectional thyristor, sub-drive circuit comprises photoelectric coupled device, rather than pulse transformer TG, produces to be used to drive the Control current that the inverse parallel unidirectional thyristor breaks off.
With reference now to Fig. 5,, it shows the sketch map according to the sub-drive circuit of another embodiment of the present invention.As shown in Figure 5, sub-drive circuit 250 is connected to as two-way gate-controlled switch k
B, k
COr k
DInverse parallel unidirectional thyristor T
3To drive inverse parallel unidirectional thyristor T
3Closure or disconnection.Sub-drive circuit 250 comprises the first photoelectric coupled device G
31, the second photoelectric coupled device G
32, pulse transformer TG and resistance R
31, R
32, R
34, R
35
Wherein, the first photoelectric coupled device G
31Comprise light-sensitive device and the luminescent device that is connected to controller 300.The first photoelectric coupled device G
31An end of light-sensitive device be connected to inverse parallel unidirectional thyristor T
3The first unidirectional thyristor T
31The control utmost point and resistance R
32A wherein end, the first photoelectric coupled device G
31The other end of light-sensitive device be connected to resistance R
31A wherein end, resistance R
31The other end and resistance R
32The other end be connected respectively to the first unidirectional thyristor T
31Anode and negative electrode.
The second photoelectric coupled device G
32Comprise light-sensitive device and the luminescent device that is connected to controller 300.The second photoelectric coupled device G
32An end of light-sensitive device be connected to inverse parallel unidirectional thyristor T
3The second unidirectional thyristor T
32The control utmost point and resistance R
35A wherein end, the second photoelectric coupled device G
32The other end of light-sensitive device be connected to resistance R
34A wherein end, resistance R
34The other end and resistance R
35The other end be connected respectively to the second unidirectional thyristor T
32Anode and negative electrode.
When controller 300 is used to cut off inverse parallel unidirectional thyristor T to drive circuit 200 outputs
3The signal of telecommunication I of the phase winding of being connected
FThe time, with inverse parallel unidirectional thyristor T
3The sub-drive circuit 250 that connects will receive this signal of telecommunication I
FAnd this signal of telecommunication I
FFlow through the first photoelectric coupled device G
31The luminescent device and the second photoelectric coupled device G
32Luminescent device.As this signal of telecommunication I
FFlow through the first photoelectric coupled device G
31The luminescent device and the second photoelectric coupled device G
32Luminescent device the time, the first photoelectric coupled device G
31The luminescent device and the second photoelectric coupled device G
32Luminescent device carry out luminous.As the first photoelectric coupled device G
31The luminescent device and the second photoelectric coupled device G
32Luminescent device the time, the first photoelectric coupled device G
31The light-sensitive device and the second photoelectric coupled device G
32The light-sensitive device conducting, the first photoelectric coupled device G
31Light-sensitive device and resistance R
31, R
32The loop and the second photoelectric coupled device G that constitute
32Light-sensitive device and resistance R
34, R
35The loop that constitutes has electric current to pass through, thus the first unidirectional thyristor T
31With the second unidirectional thyristor T
32The control utmost point be provided Control current I
G1And I
G2, cause the first unidirectional thyristor T
31With the second unidirectional thyristor T
32Break off, this makes inverse parallel unidirectional thyristor T
3The phase winding of being connected was cut off with being connected of other winding.
In addition, stop to be used to cut off inverse parallel unidirectional thyristor T at controller 300 to drive circuit 200 outputs
3The signal of telecommunication I of the phase winding of being connected
FAfter, do not have the signal of telecommunication and flow through the first photoelectric coupled device G
31The luminescent device and the second photoelectric coupled device G
32Luminescent device, the first photoelectric coupled device G
31The luminescent device and the second photoelectric coupled device G
32Luminescent device can be not luminous, flow through the first photoelectric coupled device G
31With the second photoelectric coupled device G
32Not conducting of light-sensitive device, the first photoelectric coupled device G
31Light-sensitive device and resistance R
31, R
32The loop and the second photoelectric coupled device G that constitute
32Light-sensitive device and resistance R
34, R
35The loop that constitutes does not have electric current to pass through, the first unidirectional thyristor T
31With the second unidirectional thyristor T
32The control utmost point be not provided Control current I
G1And I
G2, the first unidirectional thyristor T
31With the second unidirectional thyristor T
32Conducting, thereby inverse parallel unidirectional thyristor T
3The phase winding of being connected can be connected with other winding.
In addition; Those skilled in the art are to be understood that; Though among described in the above each embodiment, after one of them phase winding that is short-circuited was cut off, the controller 300 of safety device 10 just calculated the new current value of the phase current of remaining each phase winding; Yet the present invention is not limited thereto.
In some other embodiment of the present invention; Calculate in advance each phase winding in all phase windings be cut off each remaining phase winding of back phase current new current value and store; Then; When being short-circuited between wherein two phase windings of all phase windings and one of them phase winding of this two phase windings when being cut off; The controller 300 of safety device 10 retrieves the new current value that this one of them phase winding is cut off the phase current of the remaining phase winding in back from the new current value of being stored, and, impel external power source to be cut off the remaining phase winding input phase current in back to this one of them phase winding according to the new current value of being retrieved.
In addition, though it will be appreciated by those skilled in the art that among described in the above each embodiment, only at the tail end of a part of phase winding, i.e. the tail end of B phase winding, C phase winding and D phase winding, the two-way gate-controlled switch of connecting, the present invention is not limited thereto.
In some other embodiment of the present invention, also can be at the tail end of each phase winding two-way gate-controlled switch of connecting.
In addition, though it will be appreciated by those skilled in the art that among described in the above each embodiment, be that example is described with four phase permagnetic synchronous motors, yet the present invention is not limited thereto.In some other embodiment of the present invention, the number of phases of permagnetic synchronous motor also can be other number, for example two phases, three-phase, five mutually or five mutually more than.
In addition, though it will be appreciated by those skilled in the art that among described in the above each embodiment; Use permagnetic synchronous motor to describe as the example of the motor that adopts the permanent magnet excitation; Yet, in the present invention, adopt the motor of permanent magnet excitation to be not limited in permagnetic synchronous motor.In some other embodiment of the present invention, adopting the motor of permanent magnet excitation can also be switched reluctance machines, p-m step motor or the magneto alternator etc. of permanent-magnet brushless DC electric machine, composite excitation.
It will be appreciated by those skilled in the art that top described each embodiment can make various changes and distortion under the situation of not inventing essence partially, and these changes and the distortion all should fall within protection scope of the present invention.Protection scope of the present invention should be limited appending claims.
Claims (6)
1. safety device comprises:
Two-way gate-controlled switch group, it is connected on the tail end of a plurality of phase windings in the motor that adopts the permanent magnet excitation;
Controller is used for when being short-circuited between any two phase windings of said a plurality of phase windings, and output is used to cut off the signal of telecommunication of one of them phase winding of said two phase windings; And
Drive circuit; It is connected with said controller with said two-way gate-controlled switch group; Be used for when the said signal of telecommunication received from said controller; The two-way gate-controlled switch that drives the tail end that is connected on said one of them phase winding in the said two-way gate-controlled switch group breaks off, to cut off being connected of other phase winding in said one of them phase winding and the said a plurality of phase windings.
2. safety device as claimed in claim 1, wherein
Said controller is further used for impelling the new current value of external power source according to the phase current of remaining each phase winding except said one of them phase winding in said a plurality of phase windings; To said remaining each phase winding input phase current; Wherein, the new current value of the phase current of said remaining each phase winding composite magnetic power that is based on said remaining each phase winding equals that the composite magnetic power principle of said a plurality of phase windings before cutting off said one of them phase winding calculates.
3. according to claim 1 or claim 2 safety device, wherein,
At least one two-way gate-controlled switch in the said two-way gate-controlled switch group is a bidirectional thyristor,
Said drive circuit comprises the sub-drive circuit of said bidirectional thyristor,
Wherein, said sub-drive circuit comprises photoelectric coupled device, first resistance and second resistance,
Wherein, Said photoelectric coupled device comprise be connected to said controller and when receive from said controller be used to cut off the signal of telecommunication of the phase winding that said bidirectional thyristor connects the time luminous luminescent device; And the light-sensitive device of not conducting when conducting and said luminescent device are not luminous when said luminescent device is luminous
One end of the light-sensitive device of said photoelectric coupled device is connected to the control utmost point of said bidirectional thyristor and a wherein end of said first resistance; The other end of the light-sensitive device of said photoelectric coupled device is connected to a wherein end of said second resistance, and the other end of the other end of said first resistance and said second resistance is connected respectively to the anode of said bidirectional thyristor and the negative electrode and the anode of negative electrode or said bidirectional thyristor.
4. according to claim 1 or claim 2 safety device, wherein,
At least one two-way gate-controlled switch in the said two-way gate-controlled switch group is the inverse parallel unidirectional thyristor,
Said drive circuit comprises the sub-drive circuit of said inverse parallel unidirectional thyristor,
Said sub-drive circuit comprises pulse transformer, first diode, second diode, the 3rd diode and the 4th diode,
Wherein, said pulse transformer comprises first secondary coil, second subprime coil and the primary coil that is connected to said controller,
One end of said first secondary coil is connected to the anode of said first diode and the negative electrode of first unidirectional thyristor in the said inverse parallel unidirectional thyristor; The other end of said first secondary coil is connected to the anode of said second diode; The negative electrode of the negative electrode of said first diode and said second diode links together and is connected to the control utmost point of said first unidirectional thyristor, and
One end of said second subprime coil is connected to the anode of said the 3rd diode and the negative electrode of second unidirectional thyristor in the said inverse parallel unidirectional thyristor; The other end of said second subprime coil is connected to the anode of said the 4th diode, and the negative electrode of the negative electrode of said the 3rd diode and said the 4th diode links together and is connected to the control utmost point of said second unidirectional thyristor.
5. motor that adopts permanent magnet excitation comprises:
Permanent magnet;
A plurality of phase windings;
Two-way gate-controlled switch group, it is connected on the tail end of said a plurality of phase windings;
Controller is used for when being short-circuited between any two phase windings of said a plurality of phase windings, and output is used to cut off the signal of telecommunication of one of them phase winding of said two phase windings; And
Drive circuit; It is connected with said controller with said two-way gate-controlled switch group; Be used for when the said signal of telecommunication received from said controller; The two-way gate-controlled switch that drives the tail end that is connected on said one of them phase winding in the said two-way gate-controlled switch group breaks off, to cut off being connected of other phase winding in said one of them phase winding and the said a plurality of phase windings.
6. motor as claimed in claim 5, wherein
Said controller is further used for impelling the new current value of external power source according to the phase current of remaining each phase winding except said one of them phase winding in said a plurality of phase windings; To said remaining each phase winding input phase current; Wherein, the new current value of the phase current of said remaining each phase winding composite magnetic power that is based on said remaining each phase winding equals that the composite magnetic power principle of said a plurality of phase windings before cutting off said one of them phase winding calculates.
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| CN201110139349XA CN102790377A (en) | 2011-05-19 | 2011-05-19 | Safety device and motor |
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| CN202034764U (en) * | 2011-05-19 | 2011-11-09 | 大禹电气科技股份有限公司 | Safety device and motor |
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| CN2836300Y (en) * | 2005-06-30 | 2006-11-08 | 长沙市湘旌电器制造有限公司 | Motor starting control and protection device |
| CN101582590A (en) * | 2008-05-13 | 2009-11-18 | 北京馨容纵横科技发展有限公司 | Zero passage triggering time-oriented sequential control circuit of 2-control 3-type thyristor switching capacitor |
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