Dynamically tuning device and tuning method for sending terminal of wireless electric energy transmission device

A wireless power transmission and tuning device technology, which is applied in the direction of circuit devices, battery circuit devices, electrical components, etc., can solve the problems of large leakage inductance of sending coils and receiving coils, line changes, and difficult changes, so as to improve transmission power and The effect of high efficiency, high active power and high tuning accuracy

A wireless power transmission and tuning device technology, which is applied in the direction of circuit devices, battery circuit devices, electrical components, etc., can solve the problems of large leakage inductance of sending coils and receiving coils, line changes, and difficult changes, so as to improve transmission power and The effect of high efficiency, high active power and high tuning accuracy

CN107069997AActive Publication Date: 2017-08-18SICHUAN HUATAI ELECTRIC
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  • Dynamically tuning device and tuning method for sending terminal of wireless electric energy transmission device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 , a dynamic tuning device at the sending end of a wireless power transmission device, including a primary side and a secondary side, an AC power supply connected to the input terminal of the primary side through the primary side rectifier bridge Z0 connected to the inverter N, the inverter N and the primary side coil L P There are voltage sensor VR, current sensor IR, tuning device and static compensation capacitor C connected in sequence P , the tuning device includes a parallel rectifier bridge Z1 and a capacitor C t , the output terminal of the rectifier bridge Z1 is connected to a BUCK circuit, the output terminal of the BUCK circuit is connected to a resistor R, the output terminals of the voltage sensor VR and the current sensor IR are connected to the phase detection device PD, and the output terminal of the phase detection device PD is connected to the control unit CU The input terminal is connected, and the control unit CU outputs the driving ...

Embodiment 2

[0032] Such as figure 1 , a dynamic tuning device at the sending end of a wireless power transmission device, including a primary side and a secondary side, an AC power supply connected to the input terminal of the primary side through the primary side rectifier bridge Z0 connected to the inverter N, the inverter N and the primary side coil L P There are voltage sensor VR, current sensor IR, tuning device and static compensation capacitor C connected in sequence P , the tuning device includes a parallel rectifier bridge Z1 and a capacitor C t , the output terminal of the rectifier bridge Z1 is connected to a BUCK circuit, the output terminal of the BUCK circuit is connected to a resistor R, the output terminals of the voltage sensor VR and the current sensor IR are connected to the phase detection device PD, and the output terminal of the phase detection device PD is connected to the control unit CU The input terminal is connected, and the control unit CU outputs the driving ...

Embodiment 3

[0038] Such as figure 1 , a tuning method for a dynamic tuning device at a sending end of a wireless power transmission device, characterized in that it includes the following steps:

[0039] Step 1, the phase measurement device PD detects the phase of the output voltage and current of the inverter to obtain the phase difference θ 0 , to determine the resonance state of the primary side;

[0040] Step 2, if it is judged in step 1 that the primary side is not resonant, the control unit CU outputs the drive signal to adjust

[0041] BUCK circuit, so that the input equivalent resistance of the BUCK circuit reaches the reference resistance R 0 , and R 0 ≥R, R is the resistance resistance connected to the output terminal of the BUCK circuit;

[0042] Step 3, adjust the input equivalent resistance of the BUCK circuit to the minimum reference resistance R by adjusting the output driving signal of the control unit CU 1 and a large reference resistance R 2 , the input equivalent ...

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Abstract

The present invention discloses a dynamically tuning device and a tuning method for the sending terminal of a wireless electric energy transmission device, and relates to the technical field of wireless electric energy transmission. The primary side of the dynamically tuning device is provided with a phase detection device PD, a BUCK circuit, a control unit CU and a rectifier bridge. According to the detected phase difference state, the resonant state is judged. Meanwhile, the real-time tuning is realized through adjusting the equivalent output resistance of the BUCK circuit. As a result, the primary side can be maintained to run at a minimum voltage phase difference and a minimum current phase difference. That means, a primary side circuit is closer to the completely resonant state, so that the active power of the sending terminal is improved. Furthermore, the transmission power and the transmission efficiency of the wireless electric energy transmission device are improved.

Description

technical field [0001] The invention relates to the technical field of wireless power transmission, in particular to a dynamic tuning device and a tuning method for a sending end of a wireless power transmission device. Background technique [0002] The research on wireless power transmission technology first started in the early 1970s. In recent years, it has rapidly become a hot spot pursued by major research institutions, and has attracted the close attention of many domestic and foreign scholars and industrial circles. Initially, this technology was mainly used for medical electronic devices implanted in the human body, such as providing non-contact power supply for artificial cardiac pacemakers. Later, scientists successively used wireless power transmission technology for non-contact power supply of electric vehicles and rail transit wireless power supply systems. Some breakthroughs have been made, and they are gradually developing in the direction of high-power applic...

Claims

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Application Information

Patent Timeline
18 Aug 2017
Publication
CN107069997A
IPC
H02J50/12
CPC
H02J7/025
Inventors
谢伟; 黄旭东