A segmented uninterrupted power supply system for the motor motion track

Abstract

The present invention discloses a segmented uninterrupted power supply system for a motor motion track, which relates to the field of motor motion tracks and includes: a position detection device, a wireless power supply transmitting device installed on the stator side, and a wireless power supply receiving device installed on the mover; the wireless power supply transmitting device includes: a plurality of sequentially connected segmented power supply units, DC bus switches corresponding to the segmented power supply units one by one, a high-power rectifier, and a transmitter controller; the transmitter controller is used to control the opening and closing states of the DC bus switches of the corresponding segmented power supply units according to the real-time position of the mover; when the mover is simultaneously located in two adjacent segmented power supply units, the DC bus switches corresponding to the two adjacent segmented power supply units are both in the closed state; phase synchronization is achieved between adjacent segmented power supply units through an optical fiber cable; the continuity and stability of power supply are achieved when the mover moves from one segmented power supply unit to another segmented power supply unit.

Description

Technical Field

[0001] The present invention relates to the field of motor motion tracks, and particularly to a segmented uninterrupted power supply system for a motor motion track. Background Art

[0002] As an important moving component in intelligent manufacturing equipment, the linear motor has been widely used in the field of industrial automation due to its high speed, high precision, simple structure, and convenient use. However, when using a linear motor as a driver in a high-precision positioning system, a conveying production line, and a processing platform, the traditional drag chain cable power supply method brings many problems, such as easy vibration, high noise, short lifespan, and increased load. Among them, the vibration problem can even affect the positioning accuracy of the motor. To solve these problems brought by the drag chain cable, the invention patent CN201910255780 proposed a cordless power supply system for a mobile work platform applied to a linear motor work platform and its implementation method. This technology improves the working efficiency and service life of the linear motor by introducing wireless power supply technology. However, this solution is only applicable to small-scale application scenarios of a single straight line segment. Subsequently, the invention patent CN202410336167 proposed a wireless power-taking electromagnetic circulation line device that realizes alternating movement between two straight line modules by adding a transverse ferry module. Although this solution realizes the connection between different segments, it also introduces mechanical wear problems and poses higher requirements for control accuracy. Therefore, in order to enable the wireless power supply technology to be implemented in larger-scale application scenarios, it is urgently necessary to develop a system that can achieve a smooth transition between different segments to ensure that the linear motor obtains uninterrupted and stable power supply. Summary of the Invention

[0003] In order to achieve a smooth transition between different segments and ensure that the linear motor obtains uninterrupted and stable power supply, the present invention proposes a segmented uninterrupted power supply system for a motor motion track, including: a position detection device, a wireless power supply transmitting device installed on the stator side, and a wireless power supply receiving device installed on the mover; the output end of the wireless power supply receiving device is electrically connected to the power input end of the mover;

[0004] The wireless power supply transmitting device includes:

[0005] A plurality of sequentially connected segmented power supply units;

[0006] DC bus switches corresponding to the segmented power supply units one by one;

[0007] A high-power rectifier, whose input end is electrically connected to an external power supply, and the output end is connected to the input ends of each DC bus switch; the output end of the DC bus switch is electrically connected to the input end of its corresponding segmented power supply unit; the output end of the segmented power supply unit is used to transmit energy to a wireless power receiving device; the high-power rectifier is used to convert the three-phase alternating current input by the external power supply into direct current, and input it into the corresponding segmented power supply unit through the DC bus switch;

[0008] A transmitter controller;

[0009] The position detection device is used to detect the real-time position of the mover; the transmitter controller is used to control the opening and closing state of the DC bus switch of the corresponding segmented power supply unit according to the real-time position of the mover;

[0010] When the mover is located in two adjacent segmented power supply units at the same time, the DC bus switches corresponding to the two adjacent segmented power supply units are both in the closed state;

[0011] Phase synchronization is achieved between adjacent segmented power supply units through an optical fiber cable, so that when the adjacent DC bus switches are both in the closed state, the magnetic field directions generated by the corresponding segmented power supply units are the same.

[0012] Further, the segmented power supply unit includes a high-frequency inverter, a transmitter resonant compensation network and a transmitting coil; the input end of the high-frequency inverter is electrically connected to the output end of the DC bus switch, and the output end is electrically connected to the input end of the transmitter resonant compensation network; the output end of the transmitter resonant compensation network is connected to the transmitting coil;

[0013] The high-frequency inverter is used to convert the direct current output by the high-power rectifier into high-frequency alternating current and input it into the transmitter resonant compensation network;

[0014] The transmitter resonant compensation network is used to resonate and compensate the high-frequency alternating current and feed the resonantly compensated high-frequency alternating current to the transmitting coil;

[0015] The transmitting coil generates an electromagnetic field based on the resonantly compensated high-frequency alternating current.

[0016] Further, the wireless power receiving device includes, connected in series in sequence: a receiving coil, a receiver resonant compensation network, a rectifier bridge and a buck DC-DC converter; the output end of the buck DC-DC converter is electrically connected to the power supply input end of the mover;

[0017] When the receiving coil on the mover enters the electromagnetic field range generated by the transmitting coil, the receiving coil captures the electromagnetic energy in the electromagnetic field and converts it into electrical energy;

[0018] The receiving - end resonant compensation network is used to perform resonant compensation on the electrical energy converted by the receiving coil to obtain high - frequency alternating current;

[0019] The rectifier bridge is used to convert the high - frequency alternating current generated by the receiving - end resonant compensation network into direct current;

[0020] The buck DC - DC converter is used to adjust the direct current output by the rectifier bridge to a constant voltage with a preset amplitude and input it into the power supply input terminal of the mover.

[0021] Further, phase synchronization between adjacent segmented power - supply units is achieved through optical fiber cables, specifically:

[0022] The segmented power - supply unit where the mover's starting motion position is located is set as the master; the master is used to generate a synchronization signal for the inverter drive signal;

[0023] The other segmented power - supply units connected after the master are set as slaves;

[0024] When the DC - bus switch corresponding to the first slave, i.e., the first slave behind the master, is closed, the synchronization signal generated by the master is synchronized to the first slave through the optical fiber cable;

[0025] When the DC - bus switch corresponding to the slave connected to the first slave, i.e., the second slave, is closed, the synchronization signal is synchronized to the second slave through the optical fiber cable until all segmented power - supply units corresponding to the closed DC - bus switches are synchronized.

[0026] Further, when the transmitter controller determines from the real - time position of the mover that the mover moves from being simultaneously located in the first segmented power - supply unit and the second segmented power - supply unit to being completely in the second segmented power - supply unit, the transmitter controller controls the DC - bus switch corresponding to the first segmented power - supply unit to disconnect;

[0027] The first segmented power - supply unit and the second segmented power - supply unit represent two adjacent segmented power - supply units.

[0028] Further, the power capacity of the high - power rectifier satisfies a first preset relationship with the power capacity of the high - frequency inverter and the number of segmented power - supply units;

[0029] The formula expression of the first preset relationship is:

[0030] ; where, represents the power capacity of the high - power rectifier; is a preset redundancy factor; represents the number of segmented power - supply units; represents the power capacity of the high - frequency inverter.

[0031] Further, a second preset relationship is satisfied between the power capacity of the high-frequency inverter, the rated power of the mover, and the sum of the number of movers that all segmented power supply units can carry;

[0032] The formula expression of the second preset relationship is:

[0033] ; where, represents the sum of the number of movers that all segmented power supply units can carry; represents the rated power of the mover.

[0034] Further, for a single mover in any segmented power supply unit, the sum of the mutual inductances between its receiving coil and all transmitting coils satisfies a third preset relationship;

[0035] The formula expression of the third preset relationship is:

[0036] ; where, is the rated operating voltage of the motor; is the operating angular frequency of the transmitting coil; represents the amplitude of the transmitting coil current; is the sum of the mutual inductances between the receiving coil and all transmitting coils.

[0037] Further, the value range of the preset redundancy factor is .

[0038] Compared with the prior art, the present invention has at least the following beneficial effects:

[0039] (1) The system of the present invention includes: a position detection device, a wireless power supply transmitting device installed on the stator side, and a wireless power supply receiving device installed on the mover; the wireless power supply transmitting device includes: a plurality of sequentially connected segmented power supply units, DC bus switches corresponding to the segmented power supply units one by one, a high-power rectifier, and a transmitting end controller; the transmitting end controller is used to control the opening and closing states of the DC bus switches of the corresponding segmented power supply units according to the real-time position of the mover; when the mover is simultaneously located in two adjacent segmented power supply units, the DC bus switches corresponding to the two adjacent segmented power supply units are both in the closed state; the adjacent segmented power supply units achieve phase synchronization through optical fiber cables, so that when the adjacent DC bus switches are both in the closed state, the magnetic field directions generated by the corresponding segmented power supply units are the same; that is, the present invention realizes the phase synchronization between adjacent segmented power supply units through optical fiber cables, so that the magnetic field directions of adjacent segmented power supply units can be instantaneously synchronized, and the continuity and stability of power supply are achieved when the mover moves from one segmented power supply unit to another;

[0040] (2) In the present invention, when the mover is located at the same time in two adjacent segmented power supply units, the DC bus switches corresponding to the two adjacent segmented power supply units are both in the closed state. That is to say, when the receiving coil is located at the junction of two adjacent transmitting coils, simultaneous power supply by the two transmitting coils can ensure the continuity of the power supply process and avoid power supply interruption or instability caused by switching. Brief Description of the Drawings

[0041] Figure 1 FIG. is a structural diagram of a segmented uninterrupted power supply system for a motor motion track according to an embodiment of the present invention;

[0042] Figure 2 FIG. is a circuit diagram corresponding to the segmented uninterrupted power supply system.

[0043] In the figure:

[0044] 10, high-power rectifier; 11, DC bus switch; 120, high-frequency inverter; 121, transmitting-end resonance compensation network; 122, transmitting coil; 123, optical fiber cable; 2, wireless power receiving device; 20, receiving coil; 21, receiving-end resonance compensation network; 22, rectifier bridge; 23, buck DC-DC converter; 3, power supply input terminal of the mover. Detailed Embodiment

[0045] The following are specific embodiments of the present invention in combination with the drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0046] In order to achieve a smooth transition between different segments and ensure that the linear motor obtains uninterrupted and stable power supply, as Figure 1 shown, the present invention proposes a segmented uninterrupted power supply system for a motor motion track, including: a position detection device, a wireless power transmitting device installed on the stator side, and a wireless power receiving device 2 installed on the mover; the output end of the wireless power receiving device 2 is electrically connected to the power supply input terminal 3 of the mover; in this embodiment, the motor includes a plurality of stators and one or more movers; when there are a plurality of movers, the movers and the wireless power receiving device 2 are in one-to-one correspondence;

[0047] The wireless power transmitting device includes:

[0048] a plurality of sequentially connected segmented power supply units;

[0049] DC bus switches 11 corresponding to the segmented power supply units one by one;

[0050] A high-power rectifier 10, whose input terminal is electrically connected to an external power supply AC, and whose output terminal is connected to the input terminals of each DC bus switch 11; the output terminal of the DC bus switch 11 is electrically connected to the input terminal of its corresponding segmented power supply unit; the output terminal of the segmented power supply unit is used to transmit energy to the wireless power receiving device 2; the high-power rectifier 10 is used to convert the three-phase alternating current input from the external power supply into direct current, and input it into the corresponding segmented power supply unit through the DC bus switch 11;

[0051] The segmented power supply unit includes a high-frequency inverter 120, a transmitting-end resonance compensation network 121 and a transmitting coil 122; the input terminal of the high-frequency inverter 120 is electrically connected to the output terminal of the DC bus switch 11, and the output terminal is electrically connected to the input terminal of the transmitting-end resonance compensation network 121; the output terminal of the transmitting-end resonance compensation network 121 is connected to the transmitting coil 122;

[0052] The high-frequency inverter 120 is used to convert the direct current output by the high-power rectifier 10 into high-frequency alternating current and input it into the transmitting-end resonance compensation network 121;

[0053] The transmitting-end resonance compensation network 121 is used to perform resonance compensation on the high-frequency alternating current and feed the resonance-compensated high-frequency alternating current to the transmitting coil 122;

[0054] The transmitting coil 122 generates an electromagnetic field based on the resonance-compensated high-frequency alternating current.

[0055] A transmitting-end controller;

[0056] The position detection device is used to detect the real-time position of the mover; the transmitting-end controller is used to control the opening and closing state of the DC bus switch 11 of the corresponding segmented power supply unit according to the real-time position of the mover;

[0057] The wireless power receiving device 2 includes, connected in series in sequence: a receiving coil 20, a receiving-end resonance compensation network 21, a rectifier bridge 22 and a buck DC-DC converter 23; the output terminal of the buck DC-DC converter 23 is electrically connected to the power supply input terminal 3 of the mover;

[0058] When the receiving coil 20 on the mover enters the electromagnetic field range generated by the transmitting coil 122, the receiving coil 20 captures the electromagnetic energy in the electromagnetic field and converts it into electrical energy;

[0059] The receiving-end resonance compensation network 21 is used to perform resonance compensation on the electrical energy converted by the receiving coil 20 to obtain high-frequency alternating current;

[0060] The rectifier bridge 22 is used to convert the high-frequency alternating current generated by the receiving-end resonance compensation network 21 into direct current;

[0061] The buck DC-DC converter 23 is used to adjust the direct current output by the rectifier bridge 22 to a constant voltage with a preset amplitude and input it into the power supply input terminal 3 of the mover.

[0062] In this embodiment Figure 2 :

[0063] U d is the direct current rectified by the high-power rectifier 10;

[0064] G k11 -G k12 , G k21 -G k22 , G k31 -G k32 , …, G kn1 -G kn2 is the DC bus switch 11 (the DC bus switch is composed of two anti-series MOSFETs);

[0065] C d1 , C d2 , C d3 …C dn are the DC bus capacitors;

[0066] G 11 -G 12 -G 13 -G 14 , G 21 -G 22 -G 23 -G 24 , G 31 -G 32 -G 33 -G 34 , …, G n1 -G n2 -G n3 -G n4 is the high-frequency inverter 120; the high-frequency inverter 120 is a full-bridge inverter composed of 4 MOSFETs;

[0067] L p1 -C pp1 -C ps1 , L p2 -C pp2 -C ps2 , L p3 -C pp3 -C ps3 , …L pn -C ppn -C psn is the transmitting end resonance compensation network 121;

[0068] L T1 , LT2 , L T3 , …, L Tn is the transmitting coil 122;

[0069] L R1 , L R2 , L R3 , …, L Rm is the receiving coil 20;

[0070] L s1 -C sp1 -C ss1 , L s2 -C sp2 -C ss2 , L s3 -C sp3 -C ss3 , …, L sm -C spm -C ssm is the receiving - end resonance compensation network 21;

[0071] D 11 -D 12 -D 13 -D 14 , D 21 -D 22 -D 23 -D 24 , D 31 -D 32 -D 33 -D 34 , …, D m1 -D m2 -D m3 -D m4 is the rectifier bridge 22; The rectifier bridge 22 is a full - bridge rectifier composed of 4 power diodes;

[0072] C R1 , C R2 , C R3 , …, C Rm are the capacitors on the output side of the rectifier bridge;

[0073] G 15 -D 15 -L DC1 , G 25 -D 25 -L DC2 , G 35 -D 35 -L DC3 , …, G m5 -D m5 -L DCmIt is a buck DC-DC converter 23; the output terminal of the buck DC-DC converter 23 is connected to the power supply input terminal of the motor rotor to provide stable electrical energy for the rotor. In Figure 2 it, the corresponding connection point is the output terminal of "G 15 -D 15 -L DC1 , G 25 -D 25 -L DC2 , …, G m5 -D m5 -L DCm ”, that is, the output terminal of “L DC1 , L DC2 , …, L DCm ” part. These components output a constant voltage to the power supply input terminal of the motor rotor;

[0074] C L1 , C L2 , C L3 …C Lm are output DC bus capacitors; the function of the DC bus capacitors is to stabilize the voltage output by the buck DC-DC converter 23. Since the voltage output by the buck DC-DC converter 23 may have certain fluctuations, the DC bus capacitors can help smooth these fluctuations and ensure the stability of the output voltage;

[0075] R L1 , R L2 …R Lm are the equivalent loads of the motor; the equivalent load (RL) is usually represented by a resistor in the circuit model and is used to simulate the resistance or power consumed that the motor needs to overcome during actual operation. In this embodiment, R L1 , R L2 …R Lm are connected to the output terminal of the buck DC-DC converter 23 to simulate the actual loads borne by the rotor at different positions. These loads can be mechanical loads during actual operation or standard loads used to test the performance of the motor.

[0076] In this embodiment of Figure 2 , “V” represents a voltage sensor, “C” represents a current sensor, “T” represents a temperature sensor, and “M” represents a magnetic field sensor. Among the above sensors, the voltage sensor and the current sensor are used to judge the overvoltage and overcurrent states that may occur in the system, the temperature sensor is used to judge the over-temperature state that may occur in the system, and the magnetic field sensor arranged on the transmitting coil is used to judge the magnetic field changes caused by metal foreign objects, etc.

[0077] In this embodiment, the formula expression of the KVL equation of the segmented uninterrupted power supply system is:

[0078]

[0079] In the formula, k represents the k-th transmitting coil; r represents the receiving coil; j represents the j-th transmitting coil; n represents the total number of transmitting coils; Z1, Z2…Z n is the equivalent input impedance on the transmitting coil side; Z r is the equivalent output impedance on the receiving coil side; is the operating angular frequency of the transmitting coil;

[0080] M 12 、M 13 …M jn are the mutual inductances between the transmitting coils; for example: M 12 、M 13 、…、M 1j 、…、M 1n respectively represent the mutual inductances between the transmitting coil M1 and other transmitting coils (M2, M3, …, M j 、…、M n ); M 23 、…、M 2j 、…、M 2n respectively represent the mutual inductances between the transmitting coil M2 and other transmitting coils (M3, …, M j 、…、M n ); M jn represents the mutual inductance between the transmitting coil M j and the transmitting coil M n ;

[0081] M 1r 、M 2r 、…、M nr represent the mutual inductances between the transmitting coils and the receiving coil; I1, I2…I n represent the currents of the transmitting coils; I r represents the current of the receiving coil; U1, U2…U n represent the induced voltages on the transmitting coil side.

[0082] The KVL equation is used to describe the voltage balance relationship in the system to ensure the stable operation of the system. The process of realizing the stable operation of the system based on the KVL equation includes the following steps:

[0083] 1. Construct a circuit model as shown in Figure 2 ;

[0084] 2. List the KVL equations: For each closed loop in the circuit model, list the voltage balance equations according to the KVL equation. These equations reflect the voltage relationship in the circuit, that is, when going around a closed loop once, the sum of the voltage drops of all components is equal to the sum of the voltage rises;

[0085] 3. Solve the system of equations: By solving the system of equations composed of these voltage balance equations, the voltage values of each node in the circuit can be obtained. These voltage values are the key parameters for the stable operation of the system;

[0086] 4. Monitor voltage balance: During the operation of the system, continuously monitor the voltage values in the circuit to ensure that they always satisfy the KVL equation. If voltage imbalance is found, it indicates that there is a problem with the system and it needs to be adjusted or repaired in a timely manner;

[0087] 5. Adjust circuit parameters: If there is voltage imbalance, the voltage balance can be restored by adjusting circuit parameters (such as resistors, capacitors, etc.).

[0088] In this embodiment, the induced voltage on the receiving coil side can be approximated as:

[0089] ;

[0090] where U inv is the equivalent output voltage of the high-frequency inverter, X p is the single-bridge arm impedance of the transmitting-end resonant compensation network, and U r is the induced voltage on the receiving coil side.

[0091] In this embodiment, the output power P r of the wireless power receiving device corresponding to any position on the motor movement track is:

[0092] ; where represents the phase angle of the induced voltage on the receiving coil side, represents the phase angle of the current in the receiving coil;

[0093] The calculation of the output power P r helps to detect fault conditions in the system, such as overload, short circuit, etc. Problems can be detected and handled in a timely manner by monitoring the change of the output power P r . In addition, at a certain position on the motor movement track, if the mutual inductance between the receiving coil of the mover and the transmitting coil is small, it may lead to insufficient output power. At this time, the output power P r can be increased by increasing the number of transmitting coils to ensure the normal operation of the mover at this position.

[0094] The power capacity of the high-power rectifier 10 satisfies a first preset relationship with the power capacity of the high-frequency inverter 120 and the number of segmented power supply units;

[0095] The formula expression of the first preset relationship is:

[0096] ; where Represents the power capacity of the high-power rectifier 10; Is the preset redundancy coefficient; Represents the number of segmented power supply units; Represents the power capacity of the high-frequency inverter 120.

[0097] The said preset redundancy coefficient The value range of .

[0098] The power capacity of the high-frequency inverter 120 satisfies a second preset relationship with the sum of the rated power of the mover and the number of movers that all segmented power supply units can carry;

[0099] The formula expression of the said second preset relationship is:

[0100] ; In the formula, Represents the sum of the number of movers that all segmented power supply units can carry; Represents the rated power of the mover.

[0101] For a single mover in any segmented power supply unit, the sum of the mutual inductances between its receiving coil 20 and all transmitting coils 122 satisfies a third preset relationship; thus ensuring that the voltage of the wireless power receiving device is greater than the rated working voltage of the motor at any position on the motor movement track;

[0102] The formula expression of the said third preset relationship is:

[0103] ; In the formula, Is the rated working voltage of the motor; Is the working angular frequency of the transmitting coil 122; Represents the amplitude of the transmitting coil current; Is the sum of the mutual inductances between the receiving coil 20 and all transmitting coils.

[0104] In order to meet the power supply requirements of the entire segmented uninterrupted power supply system, this system must satisfy the first preset relationship, the second preset relationship, and the third preset relationship.

[0105] When the mover is simultaneously located in two adjacent segmented power supply units, the DC bus switches 11 corresponding to these two adjacent segmented power supply units are both in the closed state;

[0106] When the transmitter controller determines from the real-time position of the mover that the mover moves from being simultaneously located in the first segmented power supply unit and the second segmented power supply unit to being completely in the second segmented power supply unit, the transmitter controller controls the DC bus switch 11 corresponding to the first segmented power supply unit to open;

[0107] The first segmented power supply unit and the second segmented power supply unit represent two adjacent segmented power supply units.

[0108] The following takes the adjacent segmented power supply unit 1 and segmented power supply unit 2 as an example for illustration:

[0109] 1. The mover enters segmented power supply unit 1: The position detection device detects that the mover enters segmented power supply unit 1, and the transmitter controller immediately closes the DC bus switch 11 of segmented power supply unit 1 to start power supply.

[0110] 2. The mover moves to segmented power supply unit 2: When the mover starts to enter segmented power supply unit 2, the position detection device notifies the transmitter controller. The transmitter controller first closes the DC bus switch 11 of segmented power supply unit 2 to ensure that the mover can still obtain stable energy supply during the transition between the two segments;

[0111] The mover completely enters segmented power supply unit 2: When the mover completely enters segmented power supply unit 2, the transmitter controller disconnects the DC bus switch of segmented power supply unit 1 to stop power supply to it.

[0112] It should be noted that in this embodiment, when the mover enters the electromagnetic field range of a certain segmented power supply unit, this segmented power supply unit can provide energy for it. At the same time, if there are more than one mover in the range of the same segmented power supply unit, then this segmented power supply unit can also supply power to these movers simultaneously.

[0113] Phase synchronization is achieved between adjacent segmented power supply units through the optical fiber cable 123, so that when the corresponding DC bus switches 11 of adjacent segmented power supply units are simultaneously in the closed state, the magnetic field directions generated by the corresponding segmented power supply units are the same.

[0114] The phase synchronization between the adjacent segmented power supply units is achieved through the optical fiber cable 123 specifically as follows:

[0115] The segmented power supply unit where the starting movement position of the mover is located is set as the master; the master is used to generate a synchronization signal for the inverter drive signal;

[0116] The other segmented power supply units connected after the master are set as slaves;

[0117] When the DC bus switch 11 corresponding to the first slave, i.e., the first slave, behind the master is closed, the synchronization signal generated by the master is synchronized to the first slave through the optical fiber cable 123;

[0118] When the DC bus switch 11 corresponding to the slave connected to the first slave, i.e., the second slave, is closed, the synchronization signal is synchronized to the second slave through the optical fiber cable 123 until all the segmented power supply units corresponding to the DC bus switches 11 in the closed state are synchronized.

[0119] It should be noted that the segmented uninterrupted power supply system for the motor motion track proposed by the present invention can be applied to other logistics transportation systems that require wireless power supply, such as magnetic drive flexible production line systems, AGV transportation systems, AMHS semiconductor wafer transportation systems, etc.

[0120] The system of the present invention includes: a position detection device, a wireless power transmission device installed on the stator side, and a wireless power reception device installed on the mover; the wireless power transmission device includes: a plurality of sequentially connected segmented power supply units, DC bus switches corresponding to the segmented power supply units one by one, a high-power rectifier, and a transmitter controller; the transmitter controller is used to control the opening and closing states of the DC bus switches of the corresponding segmented power supply units according to the real-time position of the mover; when the mover is simultaneously located in two adjacent segmented power supply units, the DC bus switches corresponding to the two adjacent segmented power supply units are both in the closed state; the phase synchronization between adjacent segmented power supply units is achieved through optical fiber cables, so that when the adjacent DC bus switches are both in the closed state, the magnetic field directions generated by the corresponding segmented power supply units are the same; that is, the present invention realizes the phase synchronization between adjacent segmented power supply units through optical fiber cables, so that the magnetic field directions of adjacent segmented power supply units can be instantaneously synchronized, thereby ensuring that when the mover moves from one segmented power supply unit to another, it will not stop or decelerate due to power interruption.

[0121] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and motion conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0122] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0123] In the present invention, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0124] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A segmented uninterrupted power supply system for the motor motion track, characterized in that, Comprising: A position detection device, a wireless power supply transmitting device installed on the stator side, and a wireless power supply receiving device installed on the mover; The output end of the wireless power supply receiving device is electrically connected to the power supply input end of the mover; The wireless power supply transmitting device includes: A plurality of sequentially connected segmented power supply units; DC bus switches corresponding to the segmented power supply units one by one; A high-power rectifier, whose input end is electrically connected to an external power supply, and the output end is connected to the input ends of the DC bus switches; the output end of the DC bus switch is electrically connected to the input end of its corresponding segmented power supply unit; the output end of the segmented power supply unit is used to transmit energy to the wireless power supply receiving device; the high-power rectifier is used to convert the three-phase alternating current input from the external power supply into direct current and input it into the corresponding segmented power supply unit through the DC bus switch; A transmitter controller; The position detection device is used to detect the real-time position of the mover; the transmitter controller is used to control the opening and closing states of the DC bus switches of the corresponding segmented power supply units according to the real-time position of the mover; When the transmitter controller determines from the real-time position of the mover that the mover moves from being simultaneously located in the first segmented power supply unit and the second segmented power supply unit to being completely in the second segmented power supply unit, the transmitter controller controls the DC bus switch corresponding to the first segmented power supply unit to disconnect; The first segmented power supply unit and the second segmented power supply unit represent two adjacent segmented power supply units; When the mover is simultaneously located in two adjacent segmented power supply units, the DC bus switches corresponding to the two adjacent segmented power supply units are both in the closed state; Phase synchronization is achieved between adjacent segmented power supply units through optical fiber cables, so that when the adjacent DC bus switches are simultaneously in the closed state, the magnetic field directions generated by the corresponding segmented power supply units are consistent; The output power P of the wireless power receiving device corresponding to any position on the motor movement track r is as follows: ; wherein, represents the phase angle of the induced voltage on the receiving coil side, represents the phase angle of the current of the receiving coil, and faults can be detected and processed in a timely manner by monitoring the change of the output power P r . For a single mover in any segmented power supply unit, the sum of the mutual inductances between its receiving coil and all transmitting coils satisfies the following preset relationship: ; wherein, is the rated operating voltage of the motor; is the operating angular frequency of the transmitting coil; represents the amplitude of the current in the transmitting coil; is the sum of the mutual inductances between the receiving coil and all the transmitting coils, so as to ensure that the voltage of the wireless power receiving device is greater than the rated operating voltage of the motor at any position on the motor motion track, thereby guaranteeing the power supply demand of the entire segmented uninterrupted power supply system; During the operation of the system, continuously monitor the voltage values in the circuit to ensure that they always satisfy the KVL equation. When voltage imbalance is found, adjust or repair it in time, where the formula expression of the KVL equation is: ； Wherein, r represents the receiving coil; j represents the j-th transmitting coil; n represents the total number of transmitting coils; Z1, Z2…Z n is the equivalent input impedance on the transmitting coil side; Z r is the equivalent output impedance on the receiving coil side; is the operating angular frequency of the transmitting coil; M 12 and M 13 …M jn is the mutual inductance between the transmitting coils, M jn represents the transmitting coil M j and the transmitting coil M n the mutual inductance between; M 1r and M 2r …, M nr represents the mutual inductance between the transmitting coil and the receiving coil; I1, I2…I n represents the current of the transmitting coil; I r represents the current of the receiving coil; U1, U2…U n represents the induced voltage on the transmitting coil side.

2. The segmented uninterrupted power supply system for the motor movement track according to claim 1, wherein The segmented power supply unit includes a high-frequency inverter, a transmitter resonant compensation network, and a transmitting coil; the input end of the high-frequency inverter is electrically connected to the output end of the DC bus switch, and the output end is electrically connected to the input end of the transmitter resonant compensation network; the output end of the transmitter resonant compensation network is connected to the transmitting coil; The high-frequency inverter is used to convert the direct current output by the high-power rectifier into high-frequency alternating current and input it into the transmitter resonant compensation network; The transmitter resonant compensation network is used to perform resonant compensation on the high-frequency alternating current and feed the resonantly compensated high-frequency alternating current to the transmitting coil; The transmitting coil generates an electromagnetic field based on the resonantly compensated high-frequency alternating current.

3. The segmented uninterrupted power supply system for the motor motion track according to claim 2, wherein, The wireless power supply receiving device includes, connected in series in sequence: a receiving coil, a receiver resonant compensation network, a rectifier bridge, and a buck DC-DC converter; the output end of the buck DC-DC converter is electrically connected to the power supply input end of the mover; When the receiving coil on the mover enters the electromagnetic field range generated by the transmitting coil, the receiving coil captures the electromagnetic energy in the electromagnetic field and converts it into electrical energy; The receiving-end resonance compensation network is used to perform resonance compensation on the electrical energy converted by the receiving coil to obtain high-frequency alternating current; The rectifier bridge is used to convert the high-frequency alternating current generated by the receiving-end resonance compensation network into direct current; The buck DC-DC converter is used to adjust the direct current output by the rectifier bridge to a constant voltage with a preset amplitude and input it into the power supply input terminal of the mover.

4. The segmented uninterrupted power supply system for the motor motion track according to claim 3, wherein, Phase synchronization between adjacent segmented power supply units is achieved through fiber optic cables. Specifically: The segmented power supply unit where the mover starts to move is set as the master, and the master is used to generate a synchronization signal for the inverter drive signal; Other segmented power supply units connected after the master are set as slaves; When the DC bus switch corresponding to the first slave, i.e., the first slave behind the master, is closed, the synchronization signal generated by the master is synchronized to the first slave through the fiber optic cable; When the DC bus switch corresponding to the slave connected to the first slave, i.e., the second slave, is closed, the synchronization signal is synchronized to the second slave through the fiber optic cable until phase synchronization is achieved for all segmented power supply units corresponding to the closed DC bus switches.

5. A segmented uninterruptible power supply system for a motor motion track according to claim 4, characterized in that, The power capacity of the high-power rectifier satisfies a first preset relationship with the power capacity of the high-frequency inverter and the number of segmented power supply units; The formula expression of the first preset relationship is: ; wherein, represents the power capacity of the high-power rectifier; is a preset redundancy factor; represents the number of sectional power supply units; represents the power capacity of the high-frequency inverter.

6. The segmented uninterrupted power supply system for the motor motion track according to claim 5, wherein, The power capacity of the high-frequency inverter satisfies a second preset relationship with the rated power of the mover and the sum of the number of movers that all segmented power supply units can carry; The formula expression of the second preset relationship is: ; where, represents the sum of the number of rotors that all sectional power supply units can carry; represents the rated power of the rotor.

7. A segmented uninterruptible power supply system for a motor motion track according to claim 6, characterized in that, The preset redundancy coefficient has a value range of .

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