High-frequency coupling collector ring

Abstract

The utility model discloses a high-frequency coupling collector ring, which relates to the technical field of collector rings and comprises a moving inductor component, a static inductor component, a rectifying circuit and a power conversion circuit, and the moving inductor component and the static inductor component are combined to form a high-frequency transformer. The power conversion circuit rectifies and filters an external power supply, converts the external power supply into a direct-current power supply, converts the direct-current power supply into high-frequency alternating-current square waves, inputs the high-frequency alternating-current square waves to a coil of the static inductor assembly and couples the high-frequency alternating-current square waves to a coil of the moving inductor assembly through a magnetic field to generate same-frequency alternating-current square-wave voltage, and the alternating-current square-wave voltage is input to the rectifying circuit. And the direct-current voltage is transmitted to an external load, so that non-contact power transmission of the collector ring can be realized, meanwhile, the service life limitation of the brush wires caused by contact transmission is changed, and the service life of the collector ring is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of bus ring technology, and in particular to a high-frequency coupling bus ring. Background Technology

[0002] Bus rings are classified into contact bus rings, non-contact bus rings, and other types. Traditional bus ring products mostly use the contact bus method, transmitting power and signals directly through contact between the ring track and the brush filaments. Contact bus rings offer advantages such as simple and reliable connection, ease of implementation, small size, and convenient connection, making them widely used in the bus ring field, especially in low-frequency applications.

[0003] Using bus rings to transmit electrical energy is an important application of bus rings. The transmitted energy is typically direct current (DC) or industrial frequency alternating current (AC), ranging from several amperes to tens or even hundreds of amperes. In practical applications, a certain pressure needs to be maintained between the brush bristles and the ring track to ensure that the contact resistance and its variation meet specified requirements; the contact resistance is generally in the milliohm range. Because the brush bristles and ring track are in relative motion, despite special measures taken in the materials and processing technology, slight friction is inevitable. Under low-speed operation, the cumulative wear of the brush bristles and ring track manifests as a process of quantitative change leading to qualitative change. When the bus ring operates for hundreds of thousands, millions, or even tens of millions of revolutions, friction marks become very obvious, and the contact resistance increases, exceeding technical specifications. In severe cases, replacement or scrapping is necessary, and repair is generally not possible. Therefore, under high-speed operation, the increased friction can significantly shorten the lifespan of the bus ring, making it difficult to meet the needs of actual operating conditions. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a high-frequency coupling bus ring for realizing contactless transmission of electrical power.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: A high-frequency coupling bus ring includes a moving inductor component, a stationary inductor component, a rectifier circuit, and a power conversion circuit. The moving inductor component and the stationary inductor component are combined to form a high-frequency transformer. The power conversion circuit is connected to an external power supply, which is input to the power conversion circuit. The power conversion circuit is used to rectify and filter the external power supply to convert it into DC power, and then convert the DC power into a high-frequency AC square wave. The power conversion circuit is connected to the stationary inductor component, which inputs the high-frequency AC square wave to the stationary inductor coil of the stationary inductor component. The stationary inductor component is coupled to the moving inductor coil of the moving inductor component through a magnetic field to generate a same-frequency AC square wave voltage. The moving inductor component is connected to the rectifier circuit, which inputs the same-frequency AC square wave voltage to the rectifier circuit. The rectifier circuit is used to rectify and filter the same-frequency AC square wave to convert it into DC voltage. The rectifier circuit is connected to the load, which inputs the DC voltage to the load.

[0006] Furthermore, the motion inductor assembly includes a motion inductor coil and a motion magnetic core, with the motion inductor coil wound on the motion magnetic core.

[0007] Furthermore, the moving magnetic core is a can-shaped magnetic core, and the material of the moving magnetic core is high-frequency soft magnetic ferrite.

[0008] Furthermore, the static inductor assembly includes a static inductor coil and a static magnetic core, with the static inductor coil wound on the static magnetic core.

[0009] Furthermore, the stationary magnetic core is a can-shaped magnetic core, and the material of the stationary magnetic core is high-frequency soft magnetic ferrite.

[0010] Furthermore, a magnetic core air gap is provided between the moving inductor component and the stationary inductor component.

[0011] Furthermore, the air gap size of the magnetic core is 0.5–3 mm.

[0012] Furthermore, the rectifier circuit consists of a resistor RL, a capacitor C2-1, an inductor L2-1, and MOSFETs Q2-1 and Q2-2. Terminal A of the main power converter board is connected to one end of inductor L2-1, the other end of inductor L2-1 is connected to one end of capacitor C2-1, the other end of capacitor C2-1 is connected to the source of MOSFET Q2-1, the drain of MOSFET Q2-1 is connected to the gate of MOSFET Q2-2, and MOSFET Q2-2... The gate of transistor Q2-1 is connected to one end of inductor L2-1, the other end of inductor L2-1 is connected to one end of resistor RL, the other end of resistor RL is connected to the other end of capacitor C2-1, the source of MOSFET Q2-2 is connected to the source of MOSFET Q2-1, the drain of MOSFET Q2-2 is connected to one end of inductor L2-1, the gate of MOSFET Q2-2 is connected to terminal B of the main power converter board, and terminal B of the main power converter board is connected to the drain of MOSFET Q2-1.

[0013] Furthermore, the power conversion circuit comprises resistors R1-1, R1-2, R1-3, R1-4, R1-5, R1-6, R1-7, and R1-8; MOSFETs Q1-1, Q1-2, Q1-3, and Q1-4; capacitors C1-1, C1-2, C1-3, C1-4, C1-5, and C1-8; coupling transformer T1-1; inductor L1-1; and sockets ZK1-1 and ZK1-2. The control circuit is connected to socket ZK1-1. The control circuit uses a UC3875 integrated circuit. Pin 1 of socket ZK1-1 is connected to one end of resistor R1-5. The other end of resistor R1-5 is connected to the gate of MOSFET Q1-1. The gate of MOSFET Q1-1 is connected to one end of resistor R1-1. The other end of resistor R1-1 is connected to pin 2 of socket ZK1-1. R1-1 is connected to the source of MOSFET Q1-1. The drain of MOSFET Q1-1 is connected to one end of capacitor C1-1. The other end of capacitor C1-1 is connected to the source of MOSFET Q1-1. The source of MOSFET Q1-1 is connected to the drain of MOSFET Q1-2. The source of MOSFET Q1-2 is connected to one end of capacitor C1-2. The other end of capacitor C1-2 is connected to the drain of MOSFET Q1-2. The gate of MOSFET Q1-2 is connected to one end of resistor R1-6 and one end of resistor R1-2. The other end of resistor R1-6 is connected to pin 3 of socket ZK1-1. The other end of resistor R1-2 is connected to pin 4 of socket ZK1-1. Pin 5 of socket ZK1-1 is connected to ground. Resistor R1-1 is connected to one end of inductor L1-1. The other end of inductor L1-1 is connected to coupling transformer T1-1.

[0014] The control circuit is connected to socket ZK1-2. Pin 1 of socket ZK1-2 is connected to one end of resistor R1-7. The other end of resistor R1-7 is connected to one end of resistor R1-3. The other end of resistor R1-3 is connected to pin 2 of socket ZK1-2. The other end of resistor R1-3 is connected to one end of capacitor C1-5. The other end of capacitor C1-5 is connected to coupling transformer T1-1. Pin 2 of socket ZK1-2 is connected to the source of MOSFET Q1-3. Pin 2 of socket ZK1-2 is connected to the drain of MOSFET Q1-4. The drain of MOSFET Q1-3 is connected to one end of capacitor C1-3. The other end of capacitor C1-3 is connected to MOSFET Q1-4. The source of transistor 1-3, the gate of MOSFET Q1-3 is connected to the other end of resistor R1-7, pin 3 of socket ZK1-2 is connected to one end of resistor R1-8, the other end of resistor R1-8 is connected to one end of resistor R1-4, the other end of resistor R1-4 is connected to pin 4 of socket ZK1-2, the other end of resistor R1-4 is connected to one end of capacitor C1-4, the drain of MOSFET Q1-4 is connected to one end of capacitor C1-4, the source of MOSFET Q1-4 is connected to the other end of capacitor C1-4, the gate of MOSFET Q1-4 is connected to one end of resistor R1-4 and the other end of resistor R1-8, and pin 5 of socket ZK1-2 is connected to ground.

[0015] This invention employs a power conversion circuit that inputs an external power source to the bus ring. The power conversion circuit rectifies and filters the external power source, converting it into DC power. Then, it converts the DC power into a high-frequency AC square wave, which is input to the coil of the stationary inductor component. Through magnetic field coupling, it is coupled to the coil of the moving inductor component, generating a same-frequency AC square wave voltage. This AC square wave voltage is input to the rectifier circuit, rectified and filtered, and converted into DC voltage, which is then delivered to the external load. This enables contactless power transmission through the bus ring, while also overcoming the brush life limitation caused by contact transmission, thus extending the service life of the bus ring. Attached Figure Description

[0016] Figure 1 This is a block diagram of the high-frequency coupling bus ring circuit principle of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of a can-shaped magnetic core.

[0018] Figure 3 This is a circuit diagram of a rectifier circuit.

[0019] Figure 4 This is a circuit diagram of a power conversion circuit. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] like Figure 1 As shown, the high-frequency coupling bus ring in this embodiment is composed of a moving inductor component, a stationary inductor component, a rectifier circuit, and a power conversion circuit connected together.

[0022] A moving inductor and a stationary inductor are combined to form a high-frequency transformer. The stationary inductor is the primary part of the high-frequency transformer, and the moving inductor is the secondary part. A magnetic core air gap with a size of 0.5 to 3 mm is provided between the moving inductor and the stationary inductor to prevent them from making contact when they move relative to each other.

[0023] The power conversion circuit is connected to an external power supply, which is input to the circuit. The power conversion circuit rectifies and filters the external power supply, converting it into DC power, and then converts the DC power into a high-frequency AC square wave. The power conversion circuit is also connected to a stationary inductor assembly, inputting the high-frequency AC square wave to its stationary inductor coil. The stationary inductor assembly is magnetically coupled to the moving inductor coil of a moving inductor assembly, generating a same-frequency AC square wave voltage. The moving inductor assembly is connected to a rectifier circuit, inputting the same-frequency AC square wave voltage to it. The rectifier circuit rectifies and filters the AC square wave, converting it into DC voltage. Finally, the rectifier circuit is connected to the load, providing the DC voltage to the load.

[0024] like Figure 2 As shown, the moving inductor assembly includes a moving inductor coil and a moving magnetic core. Based on the power and voltage requirements of the load, the number of turns and the cross-sectional area of ​​the conductor in the moving inductor coil are calculated. High-strength enameled wire is used to wind multiple strands in parallel, and the moving inductor coil is wound onto the moving magnetic core to form the moving inductor assembly. The moving magnetic core is a can-shaped core, and its material is high-frequency soft magnetic ferrite to improve transmission efficiency and reduce transmission loss.

[0025] A static inductor assembly includes a static inductor coil and a static magnetic core. Based on the required power transmission and the output voltage of the power conversion circuit, the number of turns and the cross-sectional area of ​​the conductor in the static inductor coil are calculated. High-strength enameled wire is used to wind multiple strands in parallel, and the static inductor coil is wound onto the static magnetic core to form the static inductor assembly. The static magnetic core is a can-shaped core, and the material of the static magnetic core is high-frequency soft magnetic ferrite.

[0026] like Figure 3As shown, the rectifier circuit consists of a resistor RL, a capacitor C2-1, an inductor L2-1, and MOSFETs Q2-1 and Q2-2. Terminal A of the main power converter board is connected to one end of inductor L2-1, the other end of inductor L2-1 is connected to one end of capacitor C2-1, the other end of capacitor C2-1 is connected to the source of MOSFET Q2-1, the drain of MOSFET Q2-1 is connected to the gate of MOSFET Q2-2, the gate of MOSFET Q2-1 is connected to one end of inductor L2-1, the other end of inductor L2-1 is connected to one end of resistor RL, the other end of resistor RL is connected to the other end of capacitor C2-1, the source of MOSFET Q2-2 is connected to the source of MOSFET Q2-1, the drain of MOSFET Q2-2 is connected to one end of inductor L2-1, the gate of MOSFET Q2-2 is connected to terminal B of the main power converter board, and terminal B of the main power converter board is connected to the drain of MOSFET Q2-1.

[0027] The rectifier circuit works as follows: the AC square wave voltage from the main power converter board is rectified into DC voltage by this circuit, and then filtered by inductor L2-1 and capacitor C2-1. Specifically, when input terminal A is positive and terminal B is negative, MOSFET Q2-1 is forward biased and conducts, while MOSFET Q2-2 is reverse biased and cut off. Current flows from terminal A to inductor L2-1, capacitor C2-1, and resistor RL, and then through MOSFET Q2-1 to terminal B. Conversely, when terminal B is positive and terminal A is negative, MOSFET Q2-2 conducts, MOSFET Q2-1 is cut off, and inductor L2-1 discharges. A discharge circuit is formed by capacitor C2-1, load resistor RL, MOSFET Q2-2, and inductor L2-1, thus improving the efficiency of the rectifier-filter circuit.

[0028] like Figure 4As shown, the power conversion circuit consists of resistors R1-1, R1-2, R1-3, R1-4, R1-5, R1-6, R1-7, and R1-8; MOSFETs Q1-1, Q1-2, Q1-3, and Q1-4; capacitors C1-1, C1-2, C1-3, C1-4, C1-5, and C1-8; coupling transformer T1-1; inductor L1-1; and sockets ZK1-1 and ZK1-2. The control circuit is connected to socket ZK1-1 and consists of a UC3875 integrated circuit and peripheral driver circuitry. Pin 1 of socket ZK1-1 is connected to one end of resistor R1-5, the other end of resistor R1-5 is connected to the gate of MOSFET Q1-1, the gate of MOSFET Q1-1 is connected to one end of resistor R1-1, and the other end of resistor R1-1 is connected to pin 2 of socket ZK1-1. Resistor R1-1 is connected to the source of MOSFET Q1-1. The drain of MOSFET Q1-1 is connected to one end of capacitor C1-1. The other end of capacitor C1-1 is connected to the source of MOSFET Q1-1. The source of MOSFET Q1-1 is connected to the drain of MOSFET Q1-2. The source of MOSFET Q1-2 is connected to one end of capacitor C1-2. The other end of capacitor C1-2 is connected to the drain of MOSFET Q1-2. The gate of MOSFET Q1-2 is connected to one end of resistor R1-6 and one end of resistor R1-2. The other end of resistor R1-6 is connected to pin 3 of socket ZK1-1. The other end of resistor R1-2 is connected to pin 4 of socket ZK1-1. Pin 5 of socket ZK1-1 is connected to ground. Resistor R1-1 is connected to one end of inductor L1-1. The other end of inductor L1-1 is connected to coupling transformer T1-1.

[0029] The control circuit is connected to socket ZK1-2. Pin 1 of socket ZK1-2 is connected to one end of resistor R1-7. The other end of resistor R1-7 is connected to one end of resistor R1-3. The other end of resistor R1-3 is connected to pin 2 of socket ZK1-2. The other end of resistor R1-3 is connected to one end of capacitor C1-5. The other end of capacitor C1-5 is connected to coupling transformer T1-1. Pin 2 of socket ZK1-2 is connected to the source of MOSFET Q1-3. Pin 2 of socket ZK1-2 is connected to the drain of MOSFET Q1-4. The drain of MOSFET Q1-3 is connected to one end of capacitor C1-3. The other end of capacitor C1-3 is connected to MOSFET Q1-4. The source of transistor 1-3, the gate of MOSFET Q1-3 is connected to the other end of resistor R1-7, pin 3 of socket ZK1-2 is connected to one end of resistor R1-8, the other end of resistor R1-8 is connected to one end of resistor R1-4, the other end of resistor R1-4 is connected to pin 4 of socket ZK1-2, the other end of resistor R1-4 is connected to one end of capacitor C1-4, the drain of MOSFET Q1-4 is connected to one end of capacitor C1-4, the source of MOSFET Q1-4 is connected to the other end of capacitor C1-4, the gate of MOSFET Q1-4 is connected to one end of resistor R1-4 and the other end of resistor R1-8, and pin 5 of socket ZK1-2 is connected to ground.

[0030] The working principle of the power conversion circuit is as follows: the control circuit sends a control signal, which controls the switching on and off of MOS field-effect transistors Q1-1, Q1-2, Q1-3, and Q1-4 through resistors R1-1, R1-5, R1-2, R1-6, R1-3, R1-7, R1-4, and R1-8. During the positive half-cycle, MOSFETs Q1-1 and Q1-4 are turned on, while MOSFETs Q1-2 and Q1-3 are turned off. Current flows from VCC, through MOSFET Q1-1, inductor L1-1, the primary winding of coupling transformer T1-1, capacitor C1-5, and MOSFET Q1-4 to ground. During the negative half-cycle, MOSFETs Q1-1 and Q1-4 are turned off, while MOSFETs Q1-2 and Q1-3 are turned on. Current flows from VCC, through MOSFET Q1-3, capacitor C1-5, the primary winding of coupling transformer T1-1, inductor L1-1, and MOSFET Q1-2 to ground. This cyclical operation generates an AC square wave voltage output, which is output to the rectifier circuit board through the secondary winding of the coupling transformer. The operating frequency is between 100kHz and 2MHz.

[0031] The working principle of this embodiment is as follows: When the external power supply is turned on, the external power supply is input to the power conversion circuit of the bus ring. The power conversion circuit rectifies and filters the external power supply to convert it into DC power, and then converts the DC power supply into a high-frequency AC square wave, which is input to the coil of the stationary inductor component. Through magnetic field coupling, it is coupled to the coil of the moving inductor component to generate an AC square wave voltage of the same frequency. This AC square wave voltage is input to the rectifier circuit, and after rectification and filtering, it is converted into DC voltage and delivered to the external load. Through the above process, contactless power transmission of the bus ring is realized.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A high-frequency coupling bus ring, characterized in that: It includes a moving inductor component, a stationary inductor component, a rectifier circuit, and a power conversion circuit. The moving inductor component and the stationary inductor component are combined to form a high-frequency transformer. The power conversion circuit is connected to an external power source. The external power source is input to the power conversion circuit, which is used to rectify and filter the external power source into DC power, and then convert the DC power into a high-frequency AC square wave. The power conversion circuit is connected to the static inductor component and inputs a high-frequency AC square wave to the static inductor coil of the static inductor component. The static inductor component is coupled to the moving inductor coil of the moving inductor component via a magnetic field to generate a square wave AC voltage of the same frequency; The motion inductor component is connected to the rectifier circuit and is used to input the same frequency AC square wave voltage to the rectifier circuit. The rectifier circuit is used to rectify and filter the same frequency AC square wave and convert it into DC voltage. The rectifier circuit is connected to the load and is used to input DC voltage to the load.

2. The high-frequency coupling bus ring according to claim 1, characterized in that: The motion inductor assembly includes a motion inductor coil and a motion magnetic core, with the motion inductor coil wound on the motion magnetic core.

3. The high-frequency coupling bus ring according to claim 2, characterized in that: The moving magnetic core is a can-shaped magnetic core, and the material of the moving magnetic core is high-frequency soft magnetic ferrite.

4. The high-frequency coupling bus ring according to claim 1, characterized in that: The static inductor assembly includes a static inductor coil and a static magnetic core, with the static inductor coil wound on the static magnetic core.

5. The high-frequency coupling bus ring according to claim 4, characterized in that: The stationary magnetic core is a can-shaped magnetic core, and the material of the stationary magnetic core is high-frequency soft magnetic ferrite.

6. The high-frequency coupling bus ring according to claim 1, characterized in that: A magnetic core air gap is provided between the moving inductor component and the stationary inductor component.

7. The high-frequency coupling bus ring according to claim 6, characterized in that: The air gap size of the magnetic core is 0.5 to 3 mm.

8. The high-frequency coupling bus ring according to claim 1, characterized in that: The rectifier circuit consists of a resistor RL, a capacitor C2-1, an inductor L2-1, and MOSFETs Q2-1 and Q2-2. Terminal A of the main power converter board is connected to one end of inductor L2-1, the other end of inductor L2-1 is connected to one end of capacitor C2-1, the other end of capacitor C2-1 is connected to the source of MOSFET Q2-1, the drain of MOSFET Q2-1 is connected to the gate of MOSFET Q2-2, the gate of MOSFET Q2-1 is connected to one end of inductor L2-1, the other end of inductor L2-1 is connected to one end of resistor RL, the other end of resistor RL is connected to the other end of capacitor C2-1, the source of MOSFET Q2-2 is connected to the source of MOSFET Q2-1, the drain of MOSFET Q2-2 is connected to one end of inductor L2-1, the gate of MOSFET Q2-2 is connected to terminal B of the main power converter board, and terminal B of the main power converter board is connected to the drain of MOSFET Q2-1.

9. The high-frequency coupling bus ring according to claim 1, characterized in that: The power conversion circuit consists of resistors R1-1, R1-2, R1-3, R1-4, R1-5, R1-6, R1-7, and R1-8; MOSFETs Q1-1, Q1-2, Q1-3, and Q1-4; capacitors C1-1, C1-2, C1-3, C1-4, C1-5, and C1-8; coupling transformer T1-1; inductor L1-1; and sockets ZK1-1 and ZK1-2. The control circuit is connected to socket ZK1-1. The control circuit uses a UC3875 integrated circuit. Pin 1 of socket ZK1-1 is connected to one end of resistor R1-5. The other end of resistor R1-5 is connected to the gate of MOSFET Q1-1. The gate of MOSFET Q1-1 is connected to one end of resistor R1-1. The other end of resistor R1-1 is connected to pin 2 of socket ZK1-1.

1. Connect the source of MOSFET Q1-1. Connect the drain of MOSFET Q1-1 to one end of capacitor C1-1. Connect the other end of capacitor C1-1 to the source of MOSFET Q1-1. Connect the source of MOSFET Q1-1 to the drain of MOSFET Q1-2. Connect the source of MOSFET Q1-2 to one end of capacitor C1-2. Connect the other end of capacitor C1-2 to the drain of MOSFET Q1-2. Connect the gate of MOSFET Q1-2 to one end of resistor R1-6 and one end of resistor R1-2. Connect the other end of resistor R1-6 to pin 3 of socket ZK1-1. Connect the other end of resistor R1-2 to pin 4 of socket ZK1-1. Connect pin 5 of socket ZK1-1 to ground. Connect resistor R1-1 to one end of inductor L1-1. Connect the other end of inductor L1-1 to coupling transformer T1-1. The control circuit is connected to socket ZK1-2. Pin 1 of socket ZK1-2 is connected to one end of resistor R1-7. The other end of resistor R1-7 is connected to one end of resistor R1-3. The other end of resistor R1-3 is connected to pin 2 of socket ZK1-2. The other end of resistor R1-3 is connected to one end of capacitor C1-5. The other end of capacitor C1-5 is connected to coupling transformer T1-1. Pin 2 of socket ZK1-2 is connected to the source of MOSFET Q1-3. Pin 2 of socket ZK1-2 is connected to the drain of MOSFET Q1-4. The drain of MOSFET Q1-3 is connected to one end of capacitor C1-3. The other end of capacitor C1-3 is connected to MOSFET Q1-4. The source of transistor 1-3, the gate of MOSFET Q1-3 is connected to the other end of resistor R1-7, pin 3 of socket ZK1-2 is connected to one end of resistor R1-8, the other end of resistor R1-8 is connected to one end of resistor R1-4, the other end of resistor R1-4 is connected to pin 4 of socket ZK1-2, the other end of resistor R1-4 is connected to one end of capacitor C1-4, the drain of MOSFET Q1-4 is connected to one end of capacitor C1-4, the source of MOSFET Q1-4 is connected to the other end of capacitor C1-4, the gate of MOSFET Q1-4 is connected to one end of resistor R1-4 and the other end of resistor R1-8, and pin 5 of socket ZK1-2 is connected to ground.

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