CN202218109U - Driving motor for driving PET-CT (Positron Emission Tomography-Computer Tomography) scanning gantry - Google Patents
Driving motor for driving PET-CT (Positron Emission Tomography-Computer Tomography) scanning gantry Download PDFInfo
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- CN202218109U CN202218109U CN2011202930261U CN201120293026U CN202218109U CN 202218109 U CN202218109 U CN 202218109U CN 2011202930261 U CN2011202930261 U CN 2011202930261U CN 201120293026 U CN201120293026 U CN 201120293026U CN 202218109 U CN202218109 U CN 202218109U
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Abstract
The utility model relates to a driving motor for driving a PET-CT scanning gantry, which comprises a motor body and a motor driving main circuit. A rotor of the motor body is fixed on the PET-CT scanning gantry; winding of a stator comprises a main winding and an auxiliary winding; the motor driving main circuit comprises a rectifying bridge and two driving circuits; the input terminal of the rectifying bridge is connected with an alternating current power supply, and the output terminal of the rectifying bridge is connected with a filter capacitor; the two driving circuits are respectively connected with two ends of the filter capacitor in parallel; and one driving circuit is connected with the main winding, and the other driving circuit is connected with the auxiliary winding. After adopting a double-winding hub motor and driving mode, the driving motor meets the requirement of rapidly starting the PET-CT scanning gantry, and simultaneously is beneficial to reducing the speed fluctuation when the PET-CT scanning gantry is in stable state, thereby being beneficial to realizing the accurate positioning of the scanning gantry.
Description
Technical field
The utility model relates to the motor body structure, particularly relates to a kind of drive motors that is used to drive the PET-CT scanning gantry.
Background technology
Positron computer x-ray tomography (PET-CT:Positron Emission Computed Tomography; Hereinafter to be referred as PET-CT) be the 3-dimensional image guiding tool; Under image-guided, playing the part of important role in the innovation of radiotherapy notion and the application; PET-CT has outstanding information gathering ability, has also caused PET-CT scanning gantry overweight simultaneously; Make that the power difference of PET-CT demand when startup, operate as normal is bigger; If adopt the simplex winding motor-driven; Electric current when the starting current of drive motors phase winding and stable operation differs bigger; Make current sensor be difficult to accurately gather the electric current of this wide swings; Be prone to cause the measure error of drive motors phase current, this error effect the accurate control of drive motors output torque, accurately brought difficulty in the location to electric machine speed regulation and PET-CT.
Summary of the invention
The utility model technical problem to be solved provides a kind of drive motors that is used to drive the PET-CT scanning gantry, makes motor speed governing and PET-CT can accurately be located smoothly.
The utility model solves the technical scheme that its technical problem adopted: a kind of drive motors that is used to drive the PET-CT scanning gantry is provided; Comprise motor body and motor-driven main circuit; The rotor of said motor body is fixed on the said PET-CT scanning gantry, and the winding of stator comprises main winding and auxilliary winding; Said motor-driven main circuit comprises rectifier bridge and two drive circuits, and the input of said rectifier bridge is connected with AC power, and output is connected with filter capacitor; Said two drive circuits are connected in parallel on the two ends of filter capacitor respectively; In said two drive circuits, a drive circuit links to each other with said main winding, and another drive circuit links to each other with said auxilliary winding.
Said drive motors is a double winding hub-type motor.
Said double winding hub-type motor is double winding PMSM motor or double winding PMBLDCM motor.
Said filter capacitor is parallelly connected with described two drive circuits through circuit of power factor correction (abbreviation pfc circuit).
Said AC power is 220V AC power or 380V AC power.
Beneficial effect
Owing to adopted above-mentioned technical scheme; The utility model compared with prior art; Have following advantage and good effect: after the utility model adopts double winding wheel hub motor and drive pattern; Not only satisfy the PET-CT scanning gantry and started requirement fast, the velocity perturbation when also helping reducing PET-CT scanning gantry stable state simultaneously, thus help the pinpoint realization of scanning gantry.Filter capacitor is parallelly connected with described two drive circuits through pfc circuit, owing to adopted pfc circuit, thus increased the electric power utilance.
Description of drawings
Fig. 1 is the electric machine structure body sketch map of the utility model;
Fig. 2 is the motor electronic winding sketch map of the utility model;
Fig. 3 is the principle schematic of the motor-driven main circuit of the utility model;
Fig. 4 is based on the Drive Structure sketch map of double winding wheel hub motor.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification to the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
The execution mode of the utility model relates to a kind of drive motors that is used to drive the PET-CT scanning gantry; Like Fig. 1, Fig. 2 and shown in Figure 3; Comprise motor body and motor-driven main circuit; The rotor 2 of said motor body is fixed on the said PET-CT scanning gantry, and the winding of stator 1 comprises main winding 11 and auxilliary winding 12; Said motor-driven main circuit comprises rectifier bridge 3 and two drive circuits 5, and the input of said rectifier bridge 3 is connected with AC power 6, and output is connected with filter capacitor 4; Said two drive circuits 5 are connected in parallel on the two ends of filter capacitor 4 respectively; In said two drive circuits 5, a drive circuit 5 links to each other with said main winding 11, and another drive circuit 5 links to each other with said auxilliary winding 12.Wherein, drive motors is a double winding hub-type motor, and AC power 6 is 220V AC power or 380V AC power.
The utility model directly is fixed on the rotor of double winding wheel hub motor on the scanning gantry, and the wheel hub motor stator winding according to starting power, steady state power, is designed to main and auxiliary double winding.Through main winding higher starting torque is provided, the bigger scanning gantry of starting moment of inertia is to shorten the CT start-up course; After the normal operation of scanning gantry, the required driving power of scanning gantry significantly reduces, and adopts this moment auxiliary winding to come the driven sweep frame separately, to reduce drive motors because the sampling error of phase current brings CT speed governing and pinpoint interference; In braking procedure, open the main winding braking function simultaneously, to shorten braking time.Starting and braking procedure, auxiliary winding can be in mode of operation or stop mode.
With two concrete embodiment the utility model is further described below.
Embodiment 1: a kind of hub-type brushless, permanently excited direct current motor that is used for directly driving Discovery ST PET-CT scanning gantry.
As shown in Figure 4, scanning gantry adopts PMBLDCM double winding wheel hub motor to drive, wherein; The rotor of PMBLDCM wheel hub motor body 8 directly is fixed on the scanning gantry; The stator winding of wheel hub motor body 8 according to starting power, steady state power, is designed to main winding 11 and auxilliary winding 12.The motor-driven main circuit comprises rectifier bridge 3 and two drive circuits 5, and the input of said rectifier bridge 3 is connected with the AC power 6 of 380V, and output is connected with filter capacitor 4; Said two drive circuits 5 are connected in parallel on the two ends of filter capacitor 4 respectively through pfc circuit 7, owing to adopted pfc circuit 7, thus increased the electric power utilance.Main winding 11 inserts the motor-driven main circuit through drive circuit B, and auxilliary winding 12 inserts the motor-driven main circuit through drive circuit A.During unlatching, drive circuit B work, disconnection drive circuit A, PET-CT starts scanning gantry through main winding 11; After the normal operation of frame to be scanned, break off drive circuit A, open drive circuit B, PET-CT normally moves through auxilliary winding 12 driven sweep frames; During braking, drive circuit B work, this moment, drive circuit A both can work, and also can not work.This operating state that changes main and auxiliary winding through switch driving circuit A and drive circuit B has satisfied the quick startup of PET-CT scanning gantry, efficiently braking and pinpoint requirement.
Embodiment 2: a kind of hub-type permanent-magnet synchronous direct current motor that is used for directly driving Discovery ST PET-CT scanning gantry.
As shown in Figure 4, scanning gantry adopts PMSM double winding wheel hub motor to drive, wherein; The rotor of PMSM wheel hub motor body 8 directly is fixed on the scanning gantry; The stator winding of wheel hub motor body 8 according to starting power, steady state power, is designed to main winding 11 and auxilliary winding 12.The motor-driven main circuit comprises rectifier bridge 3 and two drive circuits 5, and the input of said rectifier bridge 3 is connected with the AC power 6 of 220V, and output is connected with filter capacitor 4; Said two drive circuits 5 are connected in parallel on the two ends of filter capacitor 4 respectively through pfc circuit 7.Main winding 11 inserts the motor-driven main circuit through drive circuit B, and auxilliary winding 12 inserts the motor-driven main circuit through drive circuit A.During unlatching, drive circuit B work, disconnection drive circuit A, PET-CT starts scanning gantry through main winding 11; After the normal operation of frame to be scanned, break off drive circuit A, open drive circuit B, PET-CT normally moves through auxilliary winding 12 driven sweep frames; During braking, drive circuit B work, this moment, drive circuit A both can work, and also can not work.This operating state that changes main and auxiliary winding through switch driving circuit A and drive circuit B has satisfied the quick startup of PET-CT scanning gantry, efficiently braking and pinpoint requirement.
Claims (5)
1. drive motors that is used to drive the PET-CT scanning gantry; Comprise motor body and motor-driven main circuit; It is characterized in that the rotor of said motor body (2) is fixed on the said PET-CT scanning gantry, the winding of stator (1) comprises main winding (11) and auxilliary winding (12); Said motor-driven main circuit comprises rectifier bridge (3) and two drive circuits (5), and the input of said rectifier bridge (3) is connected with AC power (6), and output is connected with filter capacitor (4); Said two drive circuits (5) are connected in parallel on the two ends of filter capacitor (4) respectively; In said two drive circuits (5), a drive circuit (5) links to each other with said main winding (11), and another drive circuit (5) links to each other with said auxilliary winding (12).
2. the drive motors that is used to drive the PET-CT scanning gantry according to claim 1 is characterized in that, said drive motors is a double winding hub-type motor.
3. the drive motors that is used to drive the PET-CT scanning gantry according to claim 2 is characterized in that, said double winding hub-type motor is double winding PMSM motor or double winding PMBLDCM motor.
4. the drive motors that is used to drive the PET-CT scanning gantry according to claim 1 is characterized in that, said filter capacitor (4) is parallelly connected with described two drive circuits (5) through circuit of power factor correction (7).
5. the drive motors that is used to drive the PET-CT scanning gantry according to claim 1 is characterized in that, said AC power (6) is 220V AC power or 380V AC power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202930261U CN202218109U (en) | 2011-08-12 | 2011-08-12 | Driving motor for driving PET-CT (Positron Emission Tomography-Computer Tomography) scanning gantry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202930261U CN202218109U (en) | 2011-08-12 | 2011-08-12 | Driving motor for driving PET-CT (Positron Emission Tomography-Computer Tomography) scanning gantry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202218109U true CN202218109U (en) | 2012-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202930261U Expired - Fee Related CN202218109U (en) | 2011-08-12 | 2011-08-12 | Driving motor for driving PET-CT (Positron Emission Tomography-Computer Tomography) scanning gantry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202218109U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2505782A (en) * | 2012-09-10 | 2014-03-12 | Protean Electric Ltd | A capacitor assembly and associated control module for an electric motor or generator |
| US10186933B2 (en) | 2013-09-10 | 2019-01-22 | Protean Electric Limited | Electric motor or generator |
-
2011
- 2011-08-12 CN CN2011202930261U patent/CN202218109U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2505782A (en) * | 2012-09-10 | 2014-03-12 | Protean Electric Ltd | A capacitor assembly and associated control module for an electric motor or generator |
| CN104823369A (en) * | 2012-09-10 | 2015-08-05 | 普罗蒂恩电子有限公司 | Electric motor or generator |
| GB2505782B (en) * | 2012-09-10 | 2016-05-18 | Protean Electric Ltd | An electric motor or generator |
| CN104823369B (en) * | 2012-09-10 | 2018-03-27 | 普罗蒂恩电子有限公司 | Motor or generator |
| US10186933B2 (en) | 2013-09-10 | 2019-01-22 | Protean Electric Limited | Electric motor or generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20140812 |
|
| EXPY | Termination of patent right or utility model |