CN209982293U - Motor structure with speed synchronous detection function - Google Patents
Motor structure with speed synchronous detection function Download PDFInfo
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- CN209982293U CN209982293U CN201921363203.1U CN201921363203U CN209982293U CN 209982293 U CN209982293 U CN 209982293U CN 201921363203 U CN201921363203 U CN 201921363203U CN 209982293 U CN209982293 U CN 209982293U
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 112
- 230000006698 induction Effects 0.000 claims abstract description 95
- 230000005284 excitation Effects 0.000 claims abstract description 25
- 230000004907 flux Effects 0.000 claims description 48
- 238000005259 measurement Methods 0.000 claims description 28
- 239000003990 capacitor Substances 0.000 claims description 8
- 229910052573 porcelain Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 241000555745 Sciuridae Species 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 39
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 7
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- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The utility model discloses a motor structure with speed synchronous detection function, including motor body, motor body includes stator core and rotor, a plurality of stator slots have been seted up on stator core's the interior circumference, the embedded three-phase stator winding that is equipped with of stator slot, all around having coil winding on the iron core tooth of each two adjacent stator slots, draw two interfaces as excitation coil use after establishing ties with the coil winding syntropy of every interval one, all the other coil winding uses as an induction winding respectively, inlay on the outer circumference of rotor and be equipped with the magnetic core of strideing across and set for stator slot length, still be equipped with synchronous speed detection device on the stator core, synchronous speed detection device includes the coil that tests the speed of coiling at every stator slot yoke portion, induction winding constitutes a set ofly with the coil that tests the speed that corresponds two stator slot yoke portions. The utility model discloses can be accurate and timely acquire motor speed signal.
Description
Technical Field
The utility model relates to the technical field of electric machines, concretely relates to motor structure with speed synchronous detection function.
Background
An Electric machine (also known as "motor") refers to an electromagnetic device that converts or transmits Electric energy according to the law of electromagnetic induction. The motor is represented by a letter M (old standard is represented by a letter D) in a circuit, the motor mainly plays a role of generating driving torque and serving as a power source of electrical appliances or various machines, the generator is represented by a letter G in a circuit, and the generator mainly plays a role of converting mechanical energy into electric energy.
The conventional motor speed measurement method generally includes that a speed sensor (such as a magnetoelectric encoder) is mounted on a rotating shaft, and the rotating speed of the motor is measured by utilizing synchronous rotation of the speed sensor and the rotating shaft, but the measuring method is greatly influenced by the sensitivity of the speed sensor, and a certain delay also exists in the transmission of signals of the speed sensor, so that the inaccurate and untimely speed of the motor detected by the speed sensor is caused, and the influence is caused on the control of a subsequent motor.
SUMMERY OF THE UTILITY MODEL
The aforesaid to prior art exist not enough, the to-be-solved technical problem of the utility model is: how to provide a motor structure with a speed synchronous detection function, which can accurately and timely acquire a motor rotating speed signal.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a motor structure with speed synchronous detection function comprises a motor body and a commutator structure body, the commutator structure comprises two commutator stator cores and a commutator rotor core which are coaxially arranged, the commutator rotor core is positioned between the two commutator stator cores, 36 stator slots are arranged on the inner circumference of each commutator stator core, 36 stator teeth are formed between every two adjacent stator slots, exciting coils are respectively wound on 18 stator teeth which are distributed at intervals and are connected in series, winding induction windings on the remaining 18 stator teeth, embedding a magnetic conduction section capable of forming a magnetic flux loop with a commutator stator core with a set length on the outer circumference of the commutator rotor core, and enabling the commutator rotor core to synchronously rotate along with the rotor of the motor body; the motor also comprises a first-phase alternating current power supply and a second-phase alternating current power supply which has a phase difference of 90 degrees with the first-phase alternating current power supply, wherein the first-phase alternating current power supply and the second-phase alternating current power supply are respectively connected with the excitation coil on one of the commutator stator cores; the speed measurement induction circuit comprises a speed measurement coil and 72 speed measurement rectifying circuits, wherein the speed measurement coil is wound on each stator slot yoke, each speed measurement coil is connected with two corresponding speed measurement rectifying circuits, the two speed measurement rectifying circuits are correspondingly connected with one analog voltage generating circuit, and the speed measurement rectifying circuits are connected with the same two speed measurement rectifying circuits.
Thus, the first-phase alternating current power supply and the second-phase alternating current power supply respectively provide electric energy for the excitation coils on the stator cores of the commutators, and by utilizing the electromagnetic induction principle, the magnetic conduction sections on the outer circumferences of the rotor cores of the commutators only span the length of the set stator slot, therefore, closed magnetic flux can be formed only on each induction winding in the stator slot at the magnetic conduction section, the electric energy is induced by the electromagnetic induction principle, at the moment, under the action of the electromagnetic force of the induction winding for inducing the electric energy, the commutator rotor core rotates, along with the rotation of the commutator rotor core, the part of the magnetic conduction section on the commutator rotor core rotates to the stator slot at other positions, the induction winding at the stator slot at the position outputs the electric energy again, and the commutator rotor core continuously rotates under the action of the electromagnetic force of the induction winding at the position, so that the continuous rotation of the commutator rotor core is realized.
Meanwhile, when the commutator rotor core rotates, the magnetic conduction section on the commutator rotor core rotates along with the commutator rotor core, when the magnetic conduction section moves to a period of just entering a magnetic flux loop connected with one induction winding, a magnetic flux loop is formed among the induction winding and the excitation coil, the magnetic flux loop can gradually increase in the rotation process of the commutator rotor core until the arc surface of the iron core of the induction winding is completely overlapped with the iron core of the magnetic conduction section, the magnetic flux of the speed measurement coil in the magnetic flux loop increases to the maximum value, and no magnetic flux passes through the speed measurement coil on the other side of the induction winding; along with the continuous rotation of the commutator rotor core, the magnetic flux in the speed measuring coil originally positioned in the magnetic flux loop is gradually reduced to zero, and the magnetic flux at the position of the speed measuring coil which originally has no magnetic flux to pass through is gradually increased to the maximum value, so that in the rotation process of the commutator rotor core, when the iron core of the commutator rotor core magnetic conduction section passes through each induction winding, the magnetic fluxes in the speed measuring coil magnetic flux loops at two sides of the induction winding are all increased from small to large, the speed signal obtained by the speed measuring coil is a sawtooth wave signal, and the slope of the sawtooth wave is changed in an ascending way, namely the angular speed change when the motor rotates to the section. Because the utility model discloses every induction winding all has a speed measuring coil about to send all fragments sawtooth wave that test the speed to link in proper order, constitute the signal of testing the speed of synchronous continuous tracking angular velocity, this signal of testing the speed exports for analog voltage generating circuit after the rectifier circuit rectification of testing the speed again, becomes the analog voltage signal of following the change of motor speed at any time after analog voltage generating circuit again, utilizes the rotational speed signal of this analog voltage signal then can be accurate timely acquisition motor.
Preferably, the analog voltage generating circuit comprises a metering capacitor C4And a reset diode D4Unidirectional output diode D6Reset resistor R3And a reflux resistance R5Said measuring capacitance C4One end of each of the resistors is connected with a reset resistor R3One end of the voltage measuring and rectifying circuit is connected with the output end of the speed measuring and rectifying circuit, and the measuring capacitor C4And the other end of the same is respectively connected with the reset diode D4And said unidirectional output diode D6The anode of the reset diode D4And the reset resistor R3Is connected to ground, and the analog voltage is generated36 circuits, 36 unidirectional output diodes D in the analog voltage generating circuit6Is connected in parallel with the return resistor R5Is connected to one end of the return resistor R5And the other end of the same is grounded.
Thus, the signal after rectification output by the tachometer coil is loaded to the metering capacitor C4A unidirectional output diode D for outputting a limited amount of voltage to form a segment tracking detection signal and 36 analog voltage generation circuits6And connecting each segment with the speed detection signal to form an uninterrupted speed detection signal, and changing the uninterrupted speed detection signal into an analog voltage signal which changes with the speed after passing through the current return resistor.
Preferably, the tacho rectification circuit comprises two diodes D2Two of said diodes D2The anodes of the two diodes D are respectively connected with one end of the speed measuring coil2The cathodes of the analog voltage generating circuit are connected in parallel and then connected with the input end of the analog voltage generating circuit.
Thus, the tacho rectification circuit passes through two diodes D2And rectifying the alternating current signal generated by the speed measuring coil and outputting the rectified alternating current signal to the analog voltage generating circuit.
Preferably, the outer circumference of the commutator rotor core is embedded with a magnetic conducting section spanning the length of 10 stator slots.
Like this, inlay on the outer circumference of commutator rotor core and be equipped with the magnetic conduction section that stridees across 10 stator slot lengths, can be so that at commutator rotor core rotatory in-process, have the induction winding of specific length to switch on all the time, guaranteed the continuous rotation of commutator rotor core.
Preferably, at each said induction winding T1-T18Are respectively provided with a speed measuring coil, wherein the speed measuring coil is connected with the induction winding T1The two corresponding speed measuring coils are respectively T1AAnd T1BAnd said induction winding T2The two corresponding speed measuring coils are respectively T2AAnd T2BAnd said induction winding T3The two corresponding speed measuring coils are respectively T3AAnd T3BAnd, andthe induction winding T4The two corresponding speed measuring coils are respectively T4AAnd T4BAnd said induction winding T5The two corresponding speed measuring coils are respectively T5AAnd T5BAnd said induction winding T6The two corresponding speed measuring coils are respectively T6AAnd T6BAnd said induction winding T7The two corresponding speed measuring coils are respectively T7AAnd T7BAnd said induction winding T8The two corresponding speed measuring coils are respectively T8AAnd T8BAnd said induction winding T9The two corresponding speed measuring coils are respectively T9AAnd T9BAnd said induction winding T10The two corresponding speed measuring coils are respectively T10AAnd T10BAnd said induction winding T11The two corresponding speed measuring coils are respectively T11AAnd T11BAnd said induction winding T12The two corresponding speed measuring coils are respectively T12AAnd T12BAnd said induction winding T13The two corresponding speed measuring coils are respectively T13AAnd T13BAnd said induction winding T14The two corresponding speed measuring coils are respectively T14AAnd T14BAnd said induction winding T15The two corresponding speed measuring coils are respectively T15AAnd T15BAnd said induction winding T16The two corresponding speed measuring coils are respectively T16AAnd T16BAnd said induction winding T17The two corresponding speed measuring coils are respectively T17AAnd T17BAnd said induction winding T18The two corresponding speed measuring coils are respectively T18AAnd T18B。
Thus, when the magnetic conductive iron core is from T1BTo T1AMoving in direction just before entering the connecting induction winding T1Period of the magnetic flux circuit, T1BExcitation coil T on the direction sideLMagnetic flux of excitation, passing through TL、T1BAnd T1The magnetic flux forming the magnetic flux circuit gradually increases until T1The cambered surfaces of the iron cores are completely overlapped by the magnetic conductive iron cores, and the magnetic flux is increased to the limit; at this time period T1AWithout magnetic fluxWhen T passes through1BAfter the magnetic flux reaches the limit, T starts to connect T1And its left side TLMagnetic flux excited until its left side TLT after the iron core cambered surface is completely overlapped by the magnetic conduction iron core1AAfter the magnetic flux reaches the limit, the magnetic conduction iron core starts to be connected with T again18And its right side TLThe magnetic flux of (a); thus, at T18To T1While the high-frequency alternating current of each is sequentially and circularly output, the speed measuring winding also sequentially and circularly outputs a high-frequency alternating current signal from weak to strong.
Preferably, the rotor of the motor body is provided with an excitation winding, the excitation winding provides excitation current through a porcelain pot transformer, the porcelain pot transformer comprises a primary iron core fixed on a stator of the motor body and a secondary iron core fixed on a rotating shaft of a rotor of the motor body, the primary iron core and the secondary iron core are coaxially arranged and have a gap, the primary iron core is in a cylindrical shape with an opening facing the secondary iron core, a magnetic conductive primary support is coaxially arranged on the primary iron core, a transformer primary coil is wound on the primary support, the primary coil of the transformer is connected with an external power supply, the secondary iron core is in a cylindrical shape with an opening facing the primary iron core, and a magnetic conductive secondary support is coaxially arranged on the secondary iron core, a transformer secondary coil is wound on the secondary support, and the current output by the transformer secondary coil supplies power to the excitation winding after passing through the rectifier.
Therefore, the external power supply supplies power to the primary coil of the transformer, the primary coil of the transformer generates a magnetic field after being electrified, the magnetic field is coupled into the secondary coil of the transformer through a gap between the primary iron core and the secondary iron core, and therefore alternating current electric energy is generated in the secondary coil of the transformer, the generated alternating current electric energy supplies power to the excitation winding after passing through the rectifier, and the structure is simpler.
Preferably, a metal skin is arranged on the part, which is not embedded with the magnetic conduction section, of the outer circumference of the commutator rotor core.
Therefore, the metal skin is arranged, so that the alternating current impedance of the induction winding during power failure can be eliminated, and the high-frequency alternating current is automatically converted to the induction winding of the positive output power supply for use.
Preferably, the rotor is a permanent magnet rotor or an excitation rotor or a squirrel-cage rotor.
Preferably, the commutator stator core and the magnetic conduction section are both made of ferrite materials.
Therefore, the ferrite material has good magnetic conductivity, is generally used and has lower cost.
Drawings
Fig. 1 is a schematic structural diagram of a commutator stator core and a commutator rotor core according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the circuit structure of the tachometer rectification circuit and the analog voltage generation circuit in the embodiment of the present invention;
fig. 3 is a schematic view of the structure and installation of the porcelain pot transformer in the embodiment of the present invention.
The reference numerals are explained below: the rotor comprises a commutator stator iron core 1, a commutator rotor iron core 2, a primary iron core 3, a transformer primary coil 4, a secondary iron core 5, a transformer secondary coil 6, a rectifier 7, a rotating shaft 8 and an excitation winding 9.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1 and fig. 2, a motor structure with a speed synchronous detection function includes a motor body and a commutator structure, the commutator structure includes two commutator stator cores 1 and a commutator rotor core 2 which are coaxially arranged, the commutator rotor core 2 is located between the two commutator stator cores 1, 36 stator slots are arranged on the inner circumference of the commutator stator core 1, 36 stator teeth are formed between the two adjacent stator slots, exciting coils are respectively wound on 18 stator teeth which are distributed at intervals and are connected in series, induction windings are wound on the remaining 18 stator teeth, a magnetic conduction section which can form a magnetic flux loop with the commutator stator cores 1 with a set length is embedded on the outer circumference of the commutator rotor core 2, and the commutator rotor core 2 rotates synchronously with a rotor of the motor body; the motor also comprises a first-phase alternating-current power supply and a second-phase alternating-current power supply which has a phase difference of 90 degrees with the first-phase alternating-current power supply, wherein the first-phase alternating-current power supply and the second-phase alternating-current power supply are respectively connected with the exciting coils on one of the commutator stator cores 1; the speed measurement induction circuit comprises a speed measurement coil and 72 speed measurement rectifying circuits wound on the yoke part of each stator slot, each speed measurement coil is connected with two corresponding speed measurement rectifying circuits, the two speed measurement rectifying circuits are correspondingly connected with one analog voltage generating circuit, and the output ends of the two speed measurement rectifying circuits connected with the same speed measurement coil are connected with the input end of one analog voltage generating circuit.
Thus, the first-phase alternating current power supply and the second-phase alternating current power supply respectively supply electric energy to the magnet exciting coils on the stator cores 1 of the commutators, and by utilizing the electromagnetic induction principle, because the magnet conducting sections on the outer circumferences of the rotor cores 2 of the commutators only span the length of the set stator slot, therefore, closed magnetic flux can be formed only on each induction winding in the stator slot at the magnetic conduction section, the electric energy is induced by the electromagnetic induction principle, at the moment, under the action of the electromagnetic force of the induction winding for inducing the electric energy, the commutator rotor core 2 rotates, along with the rotation of the commutator rotor core 2, the part of the magnetic conduction section on the commutator rotor core 2 rotates to the stator slot at other positions, the induction winding at the stator slot at the position outputs the electric energy again, the commutator rotor core 2 continuously rotates under the action of the electromagnetic force of the induction winding at the position, and therefore the continuous rotation of the commutator rotor core 2 is realized.
Meanwhile, when the commutator rotor core 2 rotates, the magnetic conducting section on the commutator rotor core 2 rotates along with the commutator rotor core 2, when the magnetic conducting section moves to a period just entering a magnetic flux loop connected with one induction winding, a magnetic flux loop is formed among the speed measuring coil positioned at the incoming side of the magnetic conducting section, the induction winding and the excitation coil, the magnetic flux loop can gradually increase in the rotation process of the commutator rotor core 2 until the iron core arc surface of the induction winding is completely overlapped with the iron core of the magnetic conducting section, the magnetic flux of the speed measuring coil positioned in the magnetic flux loop increases to the maximum value, and no magnetic flux passes through the speed measuring coil at the other side of the induction winding; along with the continuous rotation of the commutator rotor core 2, the magnetic flux in the speed measuring coil originally positioned in the magnetic flux loop is gradually reduced to zero, and the magnetic flux at the position of the speed measuring coil which originally has no magnetic flux to pass through is gradually increased to the maximum value, so that in the rotation process of the commutator rotor core 2, when the iron core of the magnetic conducting section of the commutator rotor core 2 passes through each induction winding, the magnetic fluxes in the magnetic flux loops of the speed measuring coils at two sides of the induction winding are all increased from small to large, the speed signal obtained by the speed measuring coil is a sawtooth wave signal, and the slope of the sawtooth wave is changed in an ascending way, namely the angular speed change of the motor rotating to the section. Because the utility model discloses every induction winding all has a speed measuring coil about to send all fragments sawtooth wave that test the speed to link in proper order, constitute the signal of testing the speed of synchronous continuous tracking angular velocity, this signal of testing the speed exports for analog voltage generating circuit after the rectifier circuit rectification of testing the speed again, becomes the analog voltage signal of following the change of motor speed at any time after analog voltage generating circuit again, utilizes the rotational speed signal of this analog voltage signal then can be accurate timely acquisition motor.
In the present embodiment, the analog voltage generating circuit includes a metering capacitor C4And a reset diode D4Unidirectional output diode D6Reset resistor R3And a reflux resistance R5Measuring capacitance C4One end of each of the resistors is connected with a reset resistor R3One end of the voltage measuring and rectifying circuit is connected with the output end of the speed measuring and rectifying circuit, and the capacitor C is measured4The other end of the first and second diodes are respectively connected with a reset diode D4Cathode and unidirectional output diode D6Is connected to the anode of a reset diode D4Anode and reset resistor R3The other end of the analog voltage generating circuits is grounded after being connected, the number of the analog voltage generating circuits is 36, and unidirectional output diodes D in the 36 analog voltage generating circuits6The cathode is connected in parallel and then connected with a reflux resistor R5Is connected at one end with a reflux resistor R5And the other end of the same is grounded.
Thus, the signal after rectification output by the tachometer coil is loaded to the metering capacitor C4A limited output is performed to form a segment tracking detection signal, and 36 analog voltage generation circuits are usedUnidirectional output diode D6And connecting each segment with the speed detection signal to form an uninterrupted speed detection signal, and changing the uninterrupted speed detection signal into an analog voltage signal which changes with the speed after passing through the current return resistor.
In this embodiment, the tacho rectification circuit comprises two diodes D2Two diodes D2The anodes of the two diodes D are respectively connected with one end of the speed measuring coil2The cathodes of the analog voltage generating circuit are connected in parallel and then connected with the input end of the analog voltage generating circuit.
Thus, the tacho rectification circuit passes through two diodes D2And rectifying the alternating current signal generated by the speed measuring coil and outputting the rectified alternating current signal to the analog voltage generating circuit.
In the present embodiment, a magnetic conductive segment spanning the length of 10 stator slots is embedded on the outer circumference of the commutator rotor core 2.
Like this, inlay on commutator rotor core 2 outer circumference and be equipped with the magnetic conduction section that stridees across 10 stator slot lengths, can be so that at commutator rotor core 2 rotatory in-process, have the induction winding of specific length to switch on all the time, guaranteed the continuous rotation of commutator rotor core 2.
In the present embodiment, at each induction winding T1-T18Are respectively provided with a speed measuring coil which is connected with the induction winding T1The two corresponding speed measuring coils are respectively T1AAnd T1BAnd the induction winding T2The two corresponding speed measuring coils are respectively T2AAnd T2BAnd the induction winding T3The two corresponding speed measuring coils are respectively T3AAnd T3BAnd the induction winding T4The two corresponding speed measuring coils are respectively T4AAnd T4BAnd the induction winding T5The two corresponding speed measuring coils are respectively T5AAnd T5BAnd the induction winding T6The two corresponding speed measuring coils are respectively T6AAnd T6BAnd the induction winding T7The two corresponding speed measuring coils are respectively T7AAnd T7BAnd the induction winding T8The two corresponding speed measuring coils are respectively T8AAnd T8BAnd the induction winding T9The two corresponding speed measuring coils are respectively T9AAnd T9BAnd the induction winding T10The two corresponding speed measuring coils are respectively T10AAnd T10BAnd the induction winding T11The two corresponding speed measuring coils are respectively T11AAnd T11BAnd the induction winding T12The two corresponding speed measuring coils are respectively T12AAnd T12BAnd the induction winding T13The two corresponding speed measuring coils are respectively T13AAnd T13BAnd the induction winding T14The two corresponding speed measuring coils are respectively T14AAnd T14BAnd the induction winding T15The two corresponding speed measuring coils are respectively T15AAnd T15BAnd the induction winding T16The two corresponding speed measuring coils are respectively T16AAnd T16BAnd the induction winding T17The two corresponding speed measuring coils are respectively T17AAnd T17BAnd the induction winding T18The two corresponding speed measuring coils are respectively T18AAnd T18B。
Thus, when the magnetic conductive iron core is from T1BTo T1AMoving in direction just before entering the connecting induction winding T1Period of the magnetic flux circuit, T1BExcitation coil T on the direction sideLMagnetic flux of excitation, passing through TL、T1BAnd T1The magnetic flux forming the magnetic flux circuit gradually increases until T1The cambered surfaces of the iron cores are completely overlapped by the magnetic conductive iron cores, and the magnetic flux is increased to the limit; at this time period T1ANo magnetic flux passing through when T1BAfter the magnetic flux reaches the limit, T starts to connect T1And its left side TLMagnetic flux excited until its left side TLT after the iron core cambered surface is completely overlapped by the magnetic conduction iron core1AAfter the magnetic flux reaches the limit, the magnetic conduction iron core starts to be connected with T again18And its right side TLThe magnetic flux of (a); thus, at T18To T1While the high-frequency alternating current of each is sequentially and circularly output, the speed measuring winding also sequentially and circularly outputs a high-frequency alternating current signal from weak to strong.
In this embodiment, as shown in fig. 3, an excitation winding 9 is disposed on a rotor of a motor body, the excitation winding 9 provides an excitation current through a porcelain pot transformer, the porcelain pot transformer includes a primary core 3 fixed on a stator of the motor body and a secondary core 5 fixed on a rotating shaft 8 of the rotor of the motor body, the primary core 3 and the secondary core 5 are coaxially disposed and have a gap, the primary core 3 is in a cylindrical shape with an opening facing the secondary core 5, a magnetically conductive primary support is coaxially disposed on the primary core 3, a primary transformer coil 4 is wound on the primary support, the primary transformer coil 4 is connected with an external power supply, the secondary core 5 is in a cylindrical shape with an opening facing the primary core 3, a magnetically conductive secondary support is coaxially disposed on the secondary core 5, a secondary transformer coil 6 is wound on the secondary support, and a current output by the secondary transformer coil 6 supplies power to the excitation winding 9 through a rectifier.
Therefore, an external power supply supplies power to the primary coil 4 of the transformer, the primary coil 4 of the transformer generates a magnetic field after being electrified, the magnetic field is coupled into the secondary coil 6 of the transformer through a gap between the primary iron core 3 and the secondary iron core 5, alternating current electric energy is generated in the secondary coil 6 of the transformer, the generated alternating current electric energy supplies power to the exciting winding 9 after passing through the rectifier 7, and the structure is simpler.
In the present embodiment, a metal skin is provided on the outer circumference of commutator rotor core 2 at a portion where no magnetic conductive segment is embedded.
Therefore, the metal skin is arranged, so that the alternating current impedance of the induction winding during power failure can be eliminated, and the high-frequency alternating current is automatically converted to the induction winding of the positive output power supply for use.
In this embodiment, the rotor is a permanent magnet rotor or an excitation rotor or a squirrel cage rotor.
In the present embodiment, the commutator stator core 1 and the magnetic conductive segments are made of ferrite material.
Therefore, the ferrite material has good magnetic conductivity, is generally used and has lower cost.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all should be covered in the scope of the claims of the present invention.
Claims (9)
1. A motor structure with a speed synchronous detection function is characterized by comprising a motor body and a commutator structure body, the commutator structure comprises two commutator stator cores and a commutator rotor core which are coaxially arranged, the commutator rotor core is positioned between the two commutator stator cores, 36 stator slots are arranged on the inner circumference of each commutator stator core, 36 stator teeth are formed between every two adjacent stator slots, exciting coils are respectively wound on 18 stator teeth which are distributed at intervals and are connected in series, winding induction windings on the remaining 18 stator teeth, embedding a magnetic conduction section capable of forming a magnetic flux loop with a commutator stator core with a set length on the outer circumference of the commutator rotor core, and enabling the commutator rotor core to synchronously rotate along with the rotor of the motor body; the motor also comprises a first-phase alternating current power supply and a second-phase alternating current power supply which has a phase difference of 90 degrees with the first-phase alternating current power supply, wherein the first-phase alternating current power supply and the second-phase alternating current power supply are respectively connected with the excitation coil on one of the commutator stator cores; the speed measurement induction circuit comprises a speed measurement coil and 72 speed measurement rectifying circuits, wherein the speed measurement coil is wound on each stator slot yoke, each speed measurement coil is connected with two corresponding speed measurement rectifying circuits, the two speed measurement rectifying circuits are correspondingly connected with one analog voltage generating circuit, and the speed measurement rectifying circuits are connected with the same two speed measurement rectifying circuits.
2. The motor structure with speed synchronization detecting function according to claim 1, wherein the analog voltage generating circuit includes a metering capacitor C4And a reset diode D4Unidirectional output diode D6Reset resistorR3And a reflux resistance R5Said measuring capacitance C4One end of each of the resistors is connected with a reset resistor R3One end of the voltage measuring and rectifying circuit is connected with the output end of the speed measuring and rectifying circuit, and the measuring capacitor C4And the other end of the same is respectively connected with the reset diode D4And said unidirectional output diode D6The anode of the reset diode D4And the reset resistor R3The other end of the analog voltage generating circuit is connected and then grounded, the analog voltage generating circuits are 36, and the unidirectional output diodes D in the 36 analog voltage generating circuits6Is connected in parallel with the return resistor R5Is connected to one end of the return resistor R5And the other end of the same is grounded.
3. The motor structure with function of synchronous speed detection as claimed in claim 1, wherein said tacho rectification circuit comprises two diodes D2Two of said diodes D2The anodes of the two diodes D are respectively connected with one end of the speed measuring coil2The cathodes of the analog voltage generating circuit are connected in parallel and then connected with the input end of the analog voltage generating circuit.
4. The electric motor structure with speed synchronization detecting function according to claim 1, wherein a magnetic conducting segment spanning 10 stator slot lengths is embedded on an outer circumference of said commutator rotor core.
5. The motor structure with speed synchronization detecting function according to claim 1, wherein in each of said induction windings T1-T18Are respectively provided with a speed measuring coil, wherein the speed measuring coil is connected with the induction winding T1The two corresponding speed measuring coils are respectively T1AAnd T1BAnd said induction winding T2The two corresponding speed measuring coils are respectively T2AAnd T2BAnd said induction winding T3The two corresponding speed measuring coils are respectively T3AAnd T3BAnd said induction winding T4Two correspond toEach speed measuring coil is T4AAnd T4BAnd said induction winding T5The two corresponding speed measuring coils are respectively T5AAnd T5BAnd said induction winding T6The two corresponding speed measuring coils are respectively T6AAnd T6BAnd said induction winding T7The two corresponding speed measuring coils are respectively T7AAnd T7BAnd said induction winding T8The two corresponding speed measuring coils are respectively T8AAnd T8BAnd said induction winding T9The two corresponding speed measuring coils are respectively T9AAnd T9BAnd said induction winding T10The two corresponding speed measuring coils are respectively T10AAnd T10BAnd said induction winding T11The two corresponding speed measuring coils are respectively T11AAnd T11BAnd said induction winding T12The two corresponding speed measuring coils are respectively T12AAnd T12BAnd said induction winding T13The two corresponding speed measuring coils are respectively T13AAnd T13BAnd said induction winding T14The two corresponding speed measuring coils are respectively T14AAnd T14BAnd said induction winding T15The two corresponding speed measuring coils are respectively T15AAnd T15BAnd said induction winding T16The two corresponding speed measuring coils are respectively T16AAnd T16BAnd said induction winding T17The two corresponding speed measuring coils are respectively T17AAnd T17BAnd said induction winding T18The two corresponding speed measuring coils are respectively T18AAnd T18B。
6. The structure of an electric motor with speed synchronization detecting function as claimed in claim 1, wherein an excitation winding is provided on the rotor of the motor body, the excitation winding provides an excitation current through a porcelain pot transformer, the porcelain pot transformer includes a primary core fixed to the stator of the motor body and a secondary core fixed to the rotating shaft of the rotor of the motor body, the primary core and the secondary core are coaxially disposed with a gap therebetween, the primary core has a cylindrical shape with an opening facing the secondary core, a magnetically conductive primary support is coaxially provided on the primary core, a primary coil of a transformer is wound on the primary support, the primary coil of the transformer is connected to an external power supply, the secondary core has a cylindrical shape with an opening facing the primary core, a magnetically conductive secondary support is coaxially provided on the secondary core, and a transformer secondary coil is wound on the secondary support, and the current output by the transformer secondary coil supplies power to the excitation winding after passing through the rectifier.
7. The motor structure with speed synchronization detecting function according to claim 1, wherein a metal skin is provided on a portion where no magnetic conducting segment is embedded on an outer circumference of the commutator rotor core.
8. The structure of an electric motor with a speed synchronization detecting function according to claim 1, wherein the rotor of the motor body is a permanent magnet rotor or an excitation rotor or a squirrel cage rotor.
9. The electric machine structure with speed synchronization detecting function according to claim 1, wherein said commutator stator core and said magnetic conductive segment are made of ferrite material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921363203.1U CN209982293U (en) | 2019-08-21 | 2019-08-21 | Motor structure with speed synchronous detection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921363203.1U CN209982293U (en) | 2019-08-21 | 2019-08-21 | Motor structure with speed synchronous detection function |
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| Publication Number | Publication Date |
|---|---|
| CN209982293U true CN209982293U (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921363203.1U Expired - Fee Related CN209982293U (en) | 2019-08-21 | 2019-08-21 | Motor structure with speed synchronous detection function |
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| Country | Link |
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| CN (1) | CN209982293U (en) |
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2019
- 2019-08-21 CN CN201921363203.1U patent/CN209982293U/en not_active Expired - Fee Related
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