The invention relates to a battery wireless charging system for a secondary side composite type compensation network, for providing constant current and constant voltage output required by a battery charging process in sequence. Two kinds of novel composite topological structures, including SS/S-LCL and LCL-LCL/LCL-S are provided; and each novel composite topological structure comprises a high-frequency full-bridge inversion circuit, a primary side compensation network, a loosen coupling transformer, a secondary side compensation network, a constant current-constant voltage switching voltage, and a full-bridge rectifying and filtering circuit separately. Based on the intrinsic characteristic of a circuit, a constant current or a constant voltage irrelevant to a load is realized at specific frequency; conversion of two kinds of modes is realized through the constant current-constant voltage switching network; in addition, approximate zero reactive ring current of the circuit and soft switching of a switching device are realized concurrently, so that the efficiency is improved while the device stress is reduced; and the constant current-constant voltage switching network is placed on the secondary side, so that complex communication between a transmitting end and a receiving end of the wireless charging system is avoided, the control is simplified, and the reliability is improved.

Battery wireless charging system for secondary side composite type compensation network

The invention discloses an induction type wireless electric energy transmission system capable of outputting constant current and constant voltage The system is composed of a transmitting part and a receiving part A constant-current and constant-voltage switching circuit (I) of the transmitting part is characterized in that a primary constant-voltage capacitor (CPv) is serially connected between a high-frequency inverter (H) and a primary coil (LP); after an additional parallel capacitor (CPp) is serially connected with a first switch (S1), an assembly which is composed of the additional parallel capacitor and the first switch is parallelly connected with a primary constant-voltage capacitor (CPv); the control end of the first switch (S1) is connected with a first controller (K1); or a primary constant-current capacitor (CPi) and an additional serial capacitor (CPs) are successively connected serially between the high-frequency inverter (H) and the primary coil (LP); a second switch (S2) is parallelly connected with the additional serial capacitor (CPs); and furthermore the control end of the second switch (S2) is connected with a second controller (K2) The induction type wireless electric energy transmission system can output constant current and constant voltage and furthermore has advantages of convenient control, high system operation stability, simple structure and low manufacture cost

Induction type wireless electric energy transmission system capable of outputting constant current and constant voltage

The invention provides a noncontact electric energy and signal synchronous transmission system and a control method thereof, wherein the noncontact electric energy and signal synchronous transmission system and the control method belong to synchronous transmission systems and control methods thereof. The noncontact electric energy and signal synchronous transmission system comprises a DC voltage link, a high-frequency inversion link, a primary side energy conversion link, a secondary side energy conversion link, a primary side signal modulation link, a secondary side signal demodulating link and a load. The high-frequency inversion link is parallelly connected with the primary side energy conversion link and the primary side signal modulation link, thereby respectively forming a fundamental wave extraction channel and a third harmonic extraction channel. Through switching on and off a switching device in the primary side signal modulation link, the signal is loaded in a third harmonic channel circuit. A signal current is coupled with the primary side energy conversion link through a unity-coupled transformer. After an energy current and the signal current are simultaneously transmitted to the secondary side by a same loose coupling magnetic path mechanism, the energy current is separated from the signal current through the secondary side energy conversion link and the secondary side signal demodulating link, thereby realizing simultaneous transmission of the electric energy and the signal. The noncontact electric energy and signal synchronous transmission system and the control method thereof further have advantages of stable output power, high signal transmission rate, small size and high efficiency.

Noncontact electric energy and signal synchronous transmission system and control method thereof

The invention puts forward a constant current-constant voltage wireless charging system and a charging method thereof. The system comprises an inverter power supply, a primary-side circuit, a secondary-side switching circuit, and a rectifier and voltage regulator circuit. The high-frequency inverter power supply provides energy for the system, and outputs frequency and voltage required by the system. The primary-side circuit produces a high-frequency current irrelevant to the parameters of the secondary-side circuit at a transmitting coil. The secondary-side switching circuit receives wireless power, and then controls switching of the secondary-side circuit topology through a switch to complete switching from constant-current charging to constant-voltage charging. The rectifier and voltage regulator circuit is used for rectifying alternating current and voltage obtained by the secondary-side switching circuit into direct current and voltage for battery charging. According to the invention, switching control of constant-current/constant-voltage modes is performed at the receiving side of a wireless charging system, so data communication and information exchange between an energy transmitting side and an energy receiving side are avoided, and zero reactive power of the wireless charging system during mode switching and normal work is ensured.

Constant current-constant voltage wireless charging system and charging method thereof

The invention discloses a wireless energy and data synchronous transmission system and a parameter acquisition method thereof, and belongs to the technical field of wireless electric energy transmission, and solves the problems that the volume is large and the error rate is increased along with the increase of transmission power existing in an existing wireless energy and data synchronous transmission scheme. A data signal to be transmitted serves as a modulating signal, and a high-frequency alternating-current voltage signal serves as a carrier signal. The modulating signal is adopted for modulating the carrier signal so as to obtain a modulated signal carried with data. The modulated signal is superposed onto an energy signal to be transmitted so as to obtain a superposed signal. The superposed signal is wirelessly transmitted to a secondary side circuit from a primary side circuit through a loose coupling transformer. The superposed signal transmitted to the secondary side circuit is separated into a modulated signal and an energy signal. The separated modulated signal is demodulated into a data signal. The system is applicable for wireless synchronous transmission of energy and data.

Wireless energy and data synchronous transmission system and parameter acquisition method thereof

The invention discloses a wireless electric energy transmission system with a switchable resonance compensation topology and a control method thereof. The system comprises a direct current power supply, a high frequency inversion mechanism, a primary side compensation mechanism, an electromagnetic coupling mechanism, a secondary side switching mechanism, a high frequency rectification mechanism, a load, a primary side control mechanism and a secondary side control mechanism. The system is characterized in that according to a power supply characteristic needed by a load or difference of power efficiency output requirements, through controlling connection and disconnection of a bidirectional switch in the secondary side switching mechanism, topology structure switching is performed; and the system can work in three kinds of working modes which are constant current output, constant voltage output and high power and high efficiency output. The system has advantages that the system can flexibly switch system working modules according to the power supply characteristic needed by load power supply or a power efficiency output requirement so as to satisfy power supply requirements of various types of loads; single resonance compensation topology restrictions are effectively overcome and a system application occasion is widened.

Wireless electric energy transmission system with switchable resonance compensation topology and control method thereof

The invention discloses a specific harmonic eliminated wireless electric energy transmission system and a design method of the specific harmonic eliminated wireless electric energy transmission system, and belongs to the wireless electric energy transmission system and design method. The system comprises a direct current power supply, a high frequency inverter, a primary side energy conversion and transmission link, a secondary side energy receiving and conversion link, a primary side harmonic energy reverse injection link and a load. After the primary side energy conversion and transmission link and the primary side harmonic energy reverse injection link respectively form a fundamental wave channel and a third harmonic extraction channel and then are reversely connected with the high frequency inverter in parallel, the third harmonic energy extracted in the primary side harmonic energy reverse injection link is reversely injected in the primary side energy conversion and transmission link through a tightly coupling transformer, thus generating superposed effects with the high frequency alternating current signals generated by the direct current power supply through the high frequency inverter. According to the system, the third harmonic content in the alternating current power supply input in the fundamental wave channel is eliminated; the design of a fundamental wave resonant network is simpler; and the system frequency stability and waveform distortion influences resulting from load or system structure change are reduced.

Specific harmonic eliminated wireless electric energy transmission system and design method

The invention discloses an inductive coupling type energy and signal synchronous transmission system and a control method thereof. The system comprises an inductive coupling electric energy transmission system, a signal modulation mechanism arranged on the secondary side of the inductive coupling electric energy transmission system and a signal demodulation mechanism arranged on the primary side of the inductive coupling electric energy transmission system. When a load requires charging, a voltage current detection circuit and a processor are firstly adopted for processing and judgment on the magnitude of the variable load is further performed. According to the magnitude of the load, a bidirectional switch is controlled to be on and off through a driving module. Signals required to be transmitted on the secondary side are modulated into the circuit so as to change the primary side current and form envelopes with different depths. Signals are further demodulated through the signal demodulation mechanism. Signal reverse synchronous transmission in an energy forward transmission condition is thus realized. The system has the beneficial effects of achieving energy and signal synchronous transmission in an unchanged load range condition by controlling a signal modulation capacitor switched in or out from the system. The system with a simple structure is convenient to operate.

Inductive coupling type energy and signal synchronous transmission system and control method thereof

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Wireless electric energy transmission system with switchable resonance compensation topology and control method thereof

Specific harmonic eliminated wireless electric energy transmission system and design method

Inductive coupling type energy and signal synchronous transmission system and control method thereof