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1.发明公开
公开(公告)号：EP4231520A1
公开(公告)日：2023-08-23
申请号：EP22778277.8
申请日：2022-01-04
发明人： LI, Yafei , ZHAO, Xudong , WANG, Sang , LIU, Xinjie , HUA, Jing , HUA, Chun
IPC分类号： H02P6/16
摘要： The present invention relates to a circuit structure for compensating for a Hall deviation of a brushless direct current motor. The circuit structure comprises: a CPU, into which a register value is written; an angle controller, which controls the forward and reverse rotations of an electric motor and compensates for a Hall deviation; a driving waveform generator, which generates driving waveforms according to a first angle signal DegOut provided by the angle controller and an amplitude signal rp_Ampln provided by the CPU; a PWM wave generator, which generates a PWM signal for driving the electric motor to rotate; the electric motor, which receives the PWM signal generated by the PWM wave generator and starts to rotate; and a Hall signal detector, which receives a Hall sensor signal generated after the rotation of the electric motor, processes the signal, and transmits the signal to the angle controller, so as to calibrate a rotor angle. The present invention further relates to a method for implementing the operation of an angle controller. The circuit structure for compensating for a Hall deviation of a brushless direct current motor, and the angle controller operation method of the present invention are used, which can be quickly handled and are convenient and simple to operate, there are no strict requirements for technicians, and the development time can be reduced. By means of the present invention, no complicated software program is required, and a CPU occupies less resources.
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公开(公告)号：EP4203619A1
公开(公告)日：2023-06-28
申请号：EP21913599.3
申请日：2021-11-22
发明人： LIU, Jun , LI, Guocheng , WU, Quanqing
IPC分类号： H05B45/345 , H05B45/10 , H05B45/30
摘要： Provided are an LED driving system and a closed-loop control method for LED driving. The LED driving system comprises an LED load (1), a constant current control module (2), an electrolytic capacitor, a discharge voltage measurement module (3), a bus voltage measurement module (4) and a charging current control module (5), wherein the charging current control module (5) is connected to the discharge voltage measurement module (3), an output end of the bus voltage measurement module (4), and a lower pole plate of the electrolytic capacitor. A charging current of the electrolytic capacitor is adjusted on the basis of a control signal of the discharge voltage measurement module (3) and a measurement voltage of the bus voltage measurement module (4). The charging current of the electrolytic capacitor is increased or decreased by performing an addition operation or a subtraction operation by means of an addition and subtraction counter, such that loop compensation digitization is realized, a peripheral circuit is most simplified, and the system cost is low.
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公开(公告)号：EP4344355A9
公开(公告)日：2024-05-15
申请号：EP22855262.6
申请日：2022-07-29
发明人： LIU, Jun , WU, Quanqing , LI, Guocheng
IPC分类号： H05B45/325
CPC分类号： H05B45/325
摘要： Provided in the present invention are a PWM signal conversion circuit and method, and an LED dimming system. The PWM signal conversion circuit comprises: a PWM signal detection module (11), which outputs a first voltage corresponding to a low-level time of a PWM signal, and a second voltage corresponding to a high-level time of the PWM signal; an addition module (12), which sums the first voltage and the second voltage to obtain a third voltage; a switch signal generation module (13), which generates a switch signal on the basis of the third voltage; a duty ratio value generation module (14), which obtains a duty ratio value on the basis of a high-level count of the switch signal for the PWM signal; and an output voltage generation module (15), which obtains, on the basis of the duty ratio value, an output voltage related to the duty ratio of the PWM signal. In the present invention, there is no need to use a large capacitor, and a peripheral circuit of a chip is simple; only one PWM signal cycle is required for extracting the duty ratio of a PWM signal, thereby achieving rapidness and high efficiency; and the frequency of performing duty ratio counting on the PWM signal is a fixed multiple of the frequency of the PWM signal itself; therefore, the duty ratio count is always constant regardless of how the frequency of the PWM signal changes, and thus the accuracy is high.
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公开(公告)号：EP4016843A1
公开(公告)日：2022-06-22
申请号：EP20896816.4
申请日：2020-12-02
发明人： LIU, Weizhong , ZHANG, Mingfeng , SHEN, Chao , JIANG, Yaping , NIU, Ruiping
IPC分类号： H03K5/01
摘要： Disclosed are a signal shaping circuit and a corresponding gate drive circuit. An additional NMOS transistor is added to the signal shaping circuit, thereby improving the requirements for the amplitude of an input differential signal, with resistors and capacitors that are connected in parallel being arranged in the circuit, so that the amplitude of the input differential signal needs to exceed a certain value for a certain period of time before the input differential signal is recognized as a trigger signal, and some interference or detuning noise caused by device mismatch is effectively filtered out. The gate drive circuit using the signal shaping circuit further comprises a pulse generating circuit, a level shifting circuit, a noise filter circuit and an output stage drive circuit. The cooperation of the circuits can effectively filter out the detuning noise and common mode noise. The use of the signal shaping circuit and the corresponding gate drive circuit can enable the circuits to work more reliably and to have a more stable performance.
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公开(公告)号：EP4016793A1
公开(公告)日：2022-06-22
申请号：EP20895132.7
申请日：2020-12-03
发明人： WANG, Zhenli , PU, Mengjun , CHEN, Chunman
摘要： A method for implementing temperature control for a wireless charging system comprises the following steps: (1) initializing a power control marker to be an initial value; (2) calculating a power loss; (3) a transmission end determining whether a value of the power loss is greater than a preset power loss threshold, and if so, proceeding to step (4), otherwise, the transmission end regulating an operation frequency according to an actual data packet sent by a receiving end, and proceeding to step (2); and (4) the transmission end determining whether a received power value of the receiving end is less than a preset received power threshold, and if so, the transmission end performing no regulation of the operation frequency, and exiting the step, otherwise, the transmission end regulating the operation frequency, and proceeding to step (2). The method for implementing temperature control for a wireless charging system solves the problem in which a charging current of a transmission end is excessively large, and board components at the transmission end have an excessively high temperature, thereby effectively reducing heat generation of components at transmission ends, and ensuring normal and stable system operations.
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公开(公告)号：EP4366116A1
公开(公告)日：2024-05-08
申请号：EP22903247.9
申请日：2022-11-28
发明人： QI, Zhengkun , LUO, Bingyin , YOU, Yong
摘要： A battery protection chip, a battery system, and a battery protection method. The battery protection chip (10) comprises: a discharge voltage limiting detection circuit (11) used for detecting a discharge drive signal output by a battery protection chip of a previous level, identifying the level of the discharge drive signal according to the current flow of a discharge detection signal of a battery protection chip of a current level, and reducing a high-low level conversion window voltage of the discharge drive signal; and a charge voltage limiting detection circuit (12) used for detecting a charge drive signal output by the battery protection chip of the previous level, identifying the level of the charge drive signal according to the current flow of a charge detection signal of the battery protection chip of the current level, and reducing a high-low level conversion window voltage of the charge drive signal. The battery protection chip solves the problems of high costs, difficulty in determining the ratio of voltage division by a resistor, and large power consumption during battery protection by existing cascaded battery protection chips.
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公开(公告)号：EP4142151A1
公开(公告)日：2023-03-01
申请号：EP21912990.5
申请日：2021-07-02
发明人： ZHOU, Xu , JIA, Hangjuan , ZHANG, Dianjun , YANG, Fan
IPC分类号： H03F3/217
摘要： A Class D power amplification modulation system for self-adaptive adjustment of an audio signal is provided, including an amplification circuit module, a pulse width modulation (PWM) circuit module connected to the amplification circuit module, a frequency detection circuit module, a carrier generator module connected to the frequency detection circuit module, an amplitude detection circuit module, a direct current (DC) potential adjustment module connected to the amplitude detection circuit module, and a drive circuit module. A method, a device, a processor, and a computer-readable storage medium are also provided. The characteristics of the circuit in the signal time domain and frequency are improved by simultaneously controlling the amplitude and the frequency of the audio signal, to minimize power consumption of signals with different amplitudes and frequencies, and to improve EMI performance, or to balance the circuit power consumption and EMI characteristics.
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公开(公告)号：EP4110022A1
公开(公告)日：2022-12-28
申请号：EP21893400.8
申请日：2021-07-02
发明人： ZENG, Jieqiong , ZHANG, Tianshun , ZHANG, Jun , DING, Zengwei , WU, Junlei , LIU, Yufang , JIANG, Lili
IPC分类号： H05B47/18
摘要： Provided is a single-chip bus slave circuit structure, comprising a monolithically integrated chip, a rectifier bridge, a first street lamp circuit, a second street lamp circuit, and a third street lamp circuit. The monolithically integrated chip is at least provided with a bus voltage input pin, a grounding pin, a first drive signal output pin, a second drive signal output pin, a third drive signal output pin, and a power supply output pin; the bus voltage input pin and the grounding pin are both connected to an output end of the rectifier bridge; an input end of the rectifier bridge is connected to positive and negative buses; and the grounding pin is further grounded. The single-chip bus slave circuit structure of the present invention is used, such that an intelligent constant-current driving function is achieved, constant-current driving of lamps is achieved within the whole bus voltage range, the constant-current characteristics of the lamps do not depend on parameters of the lamps, and the brightness of the lamps is kept uniform; meanwhile, the number of the driven lamps can be flexibly adjusted, and high energy use efficiency can be guaranteed.
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公开(公告)号：EP4110016A1
公开(公告)日：2022-12-28
申请号：EP21913598.5
申请日：2021-11-22
发明人： LIU, Jun , LI, Guocheng , WU, Quanqing
IPC分类号： H05B45/325
摘要： Provided is an LED dimming circuit, comprising a low-level voltage generation module (100), a high-level voltage generation module (200), a reference voltage generation module (500), and a dimming signal generation module (600). The high level and the low level of a low-frequency PWM signal are counted to obtain a high-level voltage and a low-level voltage relative to a time, and then the low-frequency PWM signal is converted into a high-frequency switching signal by means of a constant current source and a capacitor, so as to obtain a direct current reference voltage that is only associated with the duty ratio of the low-frequency PWM signal; when the reference voltage is greater than a set voltage, the reference voltage is outputted to be used as a dimming signal; and when the reference voltage is less than the set voltage, a new PWM signal having an amplitude value being the set voltage and the frequency unrelated to the low-frequency PWM signal is outputted to be used as a dimming signal, and the average value of the new PWM signal is the same as the reference voltage. The provided LED dimming circuit solves the problems that a dimming mode of combining existing analog dimming and PWM dimming has a limited dimming frequency and has a high requirement for a single chip microcomputer generating the dimming signal.
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公开(公告)号：EP4456397A1
公开(公告)日：2024-10-30
申请号：EP23777798.2
申请日：2023-03-10
发明人： LIU, Weizhong , ZHANG, Chao , JIANG, Yaping , LI, Jian , XIE, Zhiwei
摘要： Provided in the present invention is a power driving circuit. The power driving circuit comprises: a high/low-side driving module, which is used for performing turning-on and turning-off according to a cooperative control signal, and when turning-on is performed, generating a high-side driving signal according to a high-side input signal and generating a low-side driving signal according to a low-side input signal; a cooperative processing module, which is used for comparing an input voltage with a threshold voltage and generating the cooperative control signal, wherein the threshold voltage is switched between a first voltage and a second voltage according to the cooperative control signal; and a temperature sensing module, which is connected to an output end of the cooperative processing module, and is used for sensing a temperature change, generating a sensing signal that changes along with the temperature, generating a sensing increment, and controlling, according to the cooperative control signal, whether to output the sensing increment and the sensing signal in a superposed manner, wherein the input voltage is related to the sensing signal. By means of the power driving circuit provided in the present invention, the problem of inconsistent actions being present between IPMs in an existing driving system is solved.
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