CN115913051A - Linear motor driving system connected in series - Google Patents
Linear motor driving system connected in series Download PDFInfo
- Publication number
- CN115913051A CN115913051A CN202211376363.6A CN202211376363A CN115913051A CN 115913051 A CN115913051 A CN 115913051A CN 202211376363 A CN202211376363 A CN 202211376363A CN 115913051 A CN115913051 A CN 115913051A
- Authority
- CN
- China
- Prior art keywords
- stator
- groups
- linear motor
- series
- motor drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 6
- 230000009849 deactivation Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/06—Linear motors
- H02P25/062—Linear motors of the induction type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Linear Motors (AREA)
Abstract
The invention discloses a series linear motor driving system, which comprises: stator groups regularly arranged along the direction of travel, the stator groups being formed by stator windings; the plurality of stator groups are divided into a plurality of stator segments; a mover fixed to the moving carrier; the energy conversion unit is used for realizing the control of the stator group power supply; each stator group is connected with the switching device in parallel, and the stator groups at the same position in the plurality of stator sections are connected with one energy conversion unit in series; the number of the energy conversion units is equal to the maximum number of the stator groups in the stator section. The invention ensures the efficiency and performance of the inverter unit and the motor (stator group), solves the problems of low efficiency and motor performance reduction caused by connecting too many stator groups in series in a loop, and improves the utilization rate of the energy converter.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of linear motor driving, in particular to a series linear motor driving system for amusement equipment.
[ background of the invention ]
Linear motors are nowadays a mainstream drive in amusement rides, mainly because linear motor drive systems are able to drive the vehicles for people in amusement rides, giving them greater acceleration and higher speed and a higher excitement. The linear motor driving system is mainly composed of stator coils and rotor magnets of a linear motor, wherein a plurality of stator coils are installed along a track, power is supplied to the rotor to generate electromagnetic induction, a magnetic field is generated on the rotor magnets fixed on a vehicle body, and driving force is generated to enable the vehicle body to start to move along the track. When the whole series stator is electrified, the problems of huge installed capacity and low efficiency are caused.
The stators in all the sections proposed in WO9924284 are all connected in series and the unneeded stators are short-circuited by the parallel switching devices to achieve local energization of the stators to solve the problem of large capacity and inefficiency of the machine when the stators proposed in 002 are connected in series. Since the power supply voltage is limited to 600V-700V, the stator connected in series excessively reduces the upper limit of the driving speed due to the counter potential voltage division; if the stator coil is reduced, the upper limit of the speed is increased, the driving force of the stator is reduced, and the driving performance of the system and the motor is reduced. And because the stators are all connected in series, in order to ensure that the constant force of the stators acts on the magnetic rotor, at least two stator groups must be always electrified simultaneously. Therefore, the short circuit switching process proposed in the patent ， The loop switch device with large current switching has great influence on the service life of the switch device.
[ summary of the invention ]
The object of the present invention is to provide a new drive scheme for a series linear motor drive system that controls the cost of the system and the failure rate of the system while ensuring full drive performance.
The purpose of the invention is realized as follows:
a tandem linear motor drive system for use on an amusement device to rapidly accelerate a vehicle over a short distance, comprising:
A. stator groups regularly arranged along the direction of travel, the stator groups being formed by stator windings; the plurality of stator groups are divided into a plurality of stator segments;
B. the rotor is fixed on the moving carrier, consists of permanent magnet groups and can interact with the magnetic field generated by the stator groups;
C. the energy conversion unit is used for realizing the power supply control of the stator group;
the method is characterized in that:
D. each stator group is connected with the switching device in parallel, and the stator groups at the same position in the plurality of stator sections are connected with one energy conversion unit in series;
E. the number of the energy conversion units is equal to the maximum number of the stator groups in the stator section.
A series linear motor drive system as described above, comprising at least two stator groups, wherein at least one stator element is included in a stator group.
The series linear motor driving system as described above, wherein the total number m × n of stator segments is divided into m regions, where m ≧ 2, and each stator segment is composed of no less than two stator groups.
A series linear motor drive system as described above, wherein the maximum number of stator groups in a stator section is larger than the maximum number of stator groups in the length of the mover.
The series linear motor driving system is characterized in that each stator group is provided with a switching device connected in parallel with the stator group, and the switching device is formed by connecting a plurality of controllable devices such as normally closed contactors, thyristors and the like in parallel or in series.
The series linear motor driving system as described in the above, wherein the energy conversion unit is an inverter unit.
The series linear motor driving system is characterized in that only one stator set is coupled with the rotor in the same inverse transformation unit loop.
A series linear motor drive system as described above, wherein each stator group is connected in parallel with a switching means so that when the stator group is not required to operate, the switching means is switched on to short circuit the stator to the effect that the particular stator group is inoperative.
The series linear motor driving system is characterized in that when the system enters a braking state, the coils of the stator set are short-circuited by the parallel switching devices to form a short-circuit braking loop.
The series linear motor driving system further comprises a sensor for detecting the speed and the position of the rotor.
Preferably, the switching device is formed by connecting a thyristor and a contactor in parallel.
The invention has the beneficial effects that:
according to the invention, through the designed driving mode of interactive relay and switching, only one stator group is driven in each inversion unit loop simultaneously in the process of moving the rotor forward, and unnecessary driving output is closed simultaneously, so that the efficiency and performance of the inversion unit and the motor (stator group) are ensured. The problems of low efficiency and reduced motor performance caused by the fact that the loops are connected with too many stator groups in series are solved, and the utilization rate of an energy converter (an inverter unit) is improved.
The present invention also improves the life span of components such as thyristors as switching devices by reducing their loads by stopping the output of the inverter unit, and reduces the failure rate thereof. In the driving system, a loop of a motor winding is short-circuited to generate braking force, so that short-circuit braking is realized, a vehicle can be braked in an emergency, and the vehicle can be prevented from backing up on a path.
[ description of the drawings ]
FIG. 1 is a block diagram of a first embodiment of the present invention;
FIG. 2 is a block diagram of a second embodiment of the present invention;
FIG. 3 is a block diagram of a third embodiment of the present invention;
fig. 4 is a structural diagram of a fourth embodiment of the present invention.
[ detailed description ] A
A tandem linear motor drive system for use primarily in amusement equipment for rapidly accelerating a vehicle over a short distance, comprising:
A. stator groups ST regularly arranged along the running direction a, wherein the stator groups are formed by stator windings; the plurality of stator groups are divided into a plurality of stator sections A;
B. a mover fixed to a moving carrier M, the mover being formed of a set of permanent magnets and capable of interacting with a magnetic field generated by the set of stators;
C. the energy conversion unit is used for realizing the power supply control of the stator group;
F. each stator group is connected with the switching device K in parallel, and the stator groups at the same position in the plurality of stator sections are connected with one energy conversion unit in series;
G. the number of the energy conversion units is equal to the maximum number of the stator groups in the stator section.
The invention comprises at least two stator groups ST, wherein at least one stator element is contained in each stator group.
The total number of m multiplied by n stator groups is divided into m areas, wherein m is larger than or equal to 2, and each stator section is composed of not less than two stator groups ST.
The maximum stator group number n in the stator section is larger than the maximum stator group number x in the length of the rotor.
Each stator group of the invention is provided with a switching device K which is connected in parallel with the stator group, and the switching device is formed by connecting a plurality of controllable devices such as normally closed contactors, thyristors and the like in parallel or in series.
The switching device of the invention can be formed by connecting a thyristor and a contactor in parallel.
The energy conversion unit of the invention is an inversion unit.
In the invention, only one stator group is coupled with the rotor in the same inversion unit loop.
Each stator group is connected with a switching device in parallel, so that when the stator group is not required to work, the purpose of enabling the stator to be short-circuited by switching on the switching device is achieved.
When the system enters a braking state, the coils of the stator set are short-circuited by the parallel switching devices to form a short-circuit braking loop.
The invention also comprises a sensor for detecting the speed and the position of the rotor.
As shown in fig. 1 to 4, the stator groups are fixedly installed in the advancing direction a of the vehicle M, and the maximum number of couplings with the stator groups is three. The linear motor drive system shown has three stator segments A1, A2, A3, wherein four stator groups (1 ST 1.., 3ST 4) are shown per stator segment (A1, A2, A3).
Each stator group has a switching device (1K 1,1K 2.. 3K 4) connected in parallel thereto. The switching device is formed by connecting a normally closed contactor and a thyristor in parallel.
The short circuit of the stator group is realized by controlling and switching on the thyristors connected in parallel with the stator group, so that the stator group without coupling is in short circuit; and disconnecting the thyristors in parallel connection with the stator groups enables current to pass through the stator groups only, so that the coupled stator groups generate driving force. The driving system sequentially starts the inversion units according to the running direction of the rotor, and the stator groups connected with the inversion units are coupled with the rotor. And after the rotor completely leaves the corresponding stator group, closing the corresponding inversion unit, and completing the switching of the switches of the stator groups before the next starting.
In fig. 1 to 4, four inverter units (U1, U2, U3, U4) are included. Wherein, the stator group that every contravariant unit connects is connected in series, and is located the same position of different stator sections respectively: the loop of the inversion unit U1 is connected in series by 1ST1,2ST1 and 3ST1 stator groups, and the loop of the inversion unit U2 is connected in series by 1ST2,2ST2 and 3ST2 stator groups. And so on.
Fig. 1 shows an embodiment of the present invention, and at time T = T1, the maximum coupling number of the mover and the stator group is 3 groups, and the mover and the stator group partially overlap with the stator group 1ST1 and 1ST3 and completely overlap with the stator group 1ST 2. The switching devices 1k1,1k2,1k3, and 1k4 are in an open state, and the other switching devices are in a closed state. At this time, in the output loop of the inverter unit U1, the stator groups 2st1,3st1 are short-circuited by the switching device, and therefore, the loop current flows only through the stator group 1ST1. In this embodiment, each of the inverter units U1, U2, U3 is in a start state, and the inverter unit U4 is in a power supply stop state, so that the stator groups 1ST1, 1ST2, 1ST3 continue to generate driving force to the mover until time T = T2 in fig. 2.
At time T = T2 in the embodiment of fig. 2 of the present invention, the mover is completely separated from the stator set 1ST1 and completely overlaps the stator sets 1ST2 and 1ST3, i.e., is about to enter the stator set 1ST4. At the moment, the output of the inverter unit U1 is stopped, and meanwhile, the inverter unit U4 is started, namely, the driving is stopped in time after the rotor leaves the magnetic field range of the stator set 1ST1, the switch device 2K1 is switched off, and the switch device 1K1 is switched on. At this time, the switching devices 1K2,1K3,1K4,2K1 are in an open state, and the other switching devices are in a closed state. And the inverter units U2, U3, U4 are all in the activated state, and the inverter unit U1 is in the deactivated state, so that the stator groups 1ST2, 1ST3, 1ST4 continuously generate driving force to the movers until time T = T3 in fig. 3. For the output loop of inverter unit U1, stator groups 1ST1,3ST1 are shorted by a switching device, so the loop current can only flow through stator group 2ST1, the switching device action is completed before the mover reaches 2ST1, so the switching device state switching belongs to no-load switching.
At time T = T3 in the embodiment of fig. 3 of the present invention, the mover is completely separated from the stator set 1ST2 and completely overlaps the stator sets 1ST3 and 1ST4, i.e., is about to enter the stator set 2ST1. At the moment, the output of the inverter unit U2 is stopped, and meanwhile, the inverter unit U1 is started, namely, the rotor stops driving in time after leaving the magnetic field range of the stator set 1ST 2. Thereafter, each of the inverter units U3, U4, and U1 is in a start state, and the inverter unit U2 is in a stop state, so that the stator groups 1ST3, 1ST4, and 2ST1 continuously generate the driving force to the movers until time T = T4 in fig. 4. During this time period, the switching device 1K1 is closed and the switching device 2K2 is opened. By analogy, the switching and the on-off of the switching device and the start-stop control coordination of each inversion unit are controlled by the coupling condition of the rotor and the stator group, so that the whole-section driving process is realized.
According to the embodiment of the driving system, the inverter units U1, U2, U3 and U4 complete energy supply to the stator groups in a cyclic relay mode.
Because the switching device is formed by connecting the normally closed contactor and the thyristor in parallel, each stator group and the normally closed contactor form a closed loop in the braking process of the vehicle. When the vehicle backs up along the accelerating direction a and passes through the stator coil, the motor winding with the short circuit in the loop can generate braking force to realize short-circuit braking, so that the vehicle can be braked in an emergency, and the vehicle can be prevented from backing up on a path.
The number of the inversion units is equal to the maximum number n of the stator groups in the stator section and is greater than the maximum number x of the stator groups in the length of the rotor, and different stator groups in the section are driven by different inversion units, so that only the x groups of stator groups coupled with the rotor and to be coupled are required to supply power continuously in the n groups of inversion units, the inversion units in the length of the stator section realize the distribution of the driving power supply in a relay driving mode, meanwhile, unnecessary driving output is closed, and the utilization rate of an energy converter (inversion unit) is improved. Each inversion unit output loop is formed by serially connecting stator groups positioned in different sections, each stator group is provided with a switch device connected with the stator group in parallel, and the switch devices are connected and disconnected to short-circuit the uncoupled stator groups, so that only one stator group coupled with the rotor in each inversion unit loop is driven, and the efficiency and the performance of the inversion unit and the stator groups are ensured. Meanwhile, the driving power supply is switched to the stator groups in different areas through the control of the switching device, so that the redistribution of the driving power supply among the stator sections is realized. And the configuration of an inversion unit is reduced, and the equipment cost is reduced.
Claims (10)
1. A tandem linear motor drive system for use on an amusement device to rapidly accelerate a vehicle over a short distance, comprising:
A. stator groups regularly arranged along the direction of travel, the stator groups being formed by stator windings; the plurality of stator groups are divided into a plurality of stator segments;
B. the rotor is fixed on the moving carrier, consists of permanent magnet groups and can interact with the magnetic field generated by the stator groups;
C. the energy conversion unit is used for realizing the control of the stator group power supply;
the method is characterized in that:
D. each stator group is connected with the switching device in parallel, and the stator groups at the same position in the plurality of stator sections are connected with one energy conversion unit in series;
E. the number of the energy conversion units is equal to the maximum number of the stator groups in the stator section.
2. A tandem linear motor drive system according to claim 1 and comprising at least two stator groups, wherein at least one stator element is included in a stator group.
3. A series linear motor drive system according to claim 1, wherein a total of m x n stator groups, where m ≧ 2, are divided into m regions, and each stator segment is composed of no less than two stator groups.
4. A series linear motor drive system according to claim 1, wherein the maximum number of stator groups in a stator section is larger than the maximum number of stator groups in the length of the mover.
5. A series linear motor drive system according to claim 1, wherein each stator group has a switching means connected in parallel therewith, and the switching means is formed by a plurality of controllable devices such as normally closed contactors, thyristors, etc. connected in parallel or in series.
6. A series linear motor drive system according to claim 1, wherein the energy conversion unit is an inverter unit.
7. A series linear motor drive system according to claim 1, wherein only one stator set is coupled to the mover in the same inverter unit circuit.
8. A series linear motor drive system according to claim 1, wherein each stator group is connected in parallel with a switching means to short circuit the stator by the switching means when operation of the stator group is not required to achieve deactivation of the particular stator group.
9. A series linear motor drive system according to claim 1 wherein the windings of the stator assembly are shorted by the parallel switching means to form a short circuit braking circuit when the system enters a braking condition.
10. A series linear motor drive system according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9, further comprising sensors for detecting the speed and position of the forcer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211376363.6A CN115913051A (en) | 2022-11-04 | 2022-11-04 | Linear motor driving system connected in series |
| PCT/CN2023/084442 WO2024093107A1 (en) | 2022-11-04 | 2023-03-28 | Series linear motor driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211376363.6A CN115913051A (en) | 2022-11-04 | 2022-11-04 | Linear motor driving system connected in series |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115913051A true CN115913051A (en) | 2023-04-04 |
Family
ID=86478833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211376363.6A Pending CN115913051A (en) | 2022-11-04 | 2022-11-04 | Linear motor driving system connected in series |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115913051A (en) |
| WO (1) | WO2024093107A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19748911A1 (en) * | 1997-11-05 | 1999-05-06 | Intrasys Gmbh | Linear drive system |
| KR100984604B1 (en) * | 2004-10-01 | 2010-09-30 | 가부시키가이샤 야스카와덴키 | Linear motor system |
| JP4822756B2 (en) * | 2005-07-26 | 2011-11-24 | カヤバ工業株式会社 | Motor drive circuit and electromagnetic suspension device |
| EP2156979B1 (en) * | 2008-08-19 | 2017-12-20 | Intrasys GmbH Innovative Transportsysteme | Linear drive, ride and method for operating a linear drive |
| CN105448603B (en) * | 2015-11-06 | 2019-01-18 | 河南理工大学 | A kind of contactless electromagnetic switch and electromagnetic linear motor formula sectional power supply switching device |
| CN218850666U (en) * | 2022-11-04 | 2023-04-11 | 广东金马游乐股份有限公司 | Linear motor driving system connected in series |
-
2022
- 2022-11-04 CN CN202211376363.6A patent/CN115913051A/en active Pending
-
2023
- 2023-03-28 WO PCT/CN2023/084442 patent/WO2024093107A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024093107A1 (en) | 2024-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0068328B1 (en) | Power supply system for a linear motor | |
| US6411049B1 (en) | Method and apparatus for operating a magnet vehicle | |
| US7362014B2 (en) | Method and arrangement for operating a magnetically levitated vehicle | |
| CA1235732A (en) | Power supply apparatus for linear motor | |
| CN218850666U (en) | Linear motor driving system connected in series | |
| CN112953121B (en) | Stator power supply method for long-stator linear motor | |
| US11214149B2 (en) | Rail vehicle and drive system for a rail vehicle | |
| CN110071678B (en) | Stator section winding step changing method for long stator linear synchronous motor of medium-speed magnetic suspension train | |
| CN100566096C (en) | Long stroke constant acceleration line electromotor and control method thereof | |
| CN104779772A (en) | Modularization flat plate type multiphase permanent magnet linear motor based on single and double layer compound windings | |
| WO2023236834A1 (en) | Magnet-wheel driving device and driving method | |
| US4202273A (en) | Travelling object control system utilizing power control | |
| Mitra et al. | On the suitability of large switched reluctance machines for propulsion applications | |
| CN115913051A (en) | Linear motor driving system connected in series | |
| KR20090107157A (en) | Hybrid linear propulsion system for train | |
| CN218733808U (en) | Parallel linear motor driving system | |
| CN111890945B (en) | Traction control system of medium-high speed maglev train | |
| JPH01248905A (en) | Split feeder circuit for superconducting magnetic levitation railroad | |
| KR101945232B1 (en) | Linear motor propulsion system | |
| JPH0763201B2 (en) | Power supply device for linear motor | |
| US1919181A (en) | Vehicle propulsion and control system | |
| RU54868U1 (en) | ELECTRIC CAR | |
| RU2076809C1 (en) | Device to control operation of dc traction motor of diesel locomotive | |
| Krishnan | Propulsion with and without wheels | |
| KR20230056921A (en) | Linear propusion system for magnetic levitation vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |