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1. 发明公开

EP4395155A1 METHOD FOR ADAPTIVELY CHANGING DUTY RATIO OF PWM, AND CIRCUIT AND ELECTRIC MOTOR DRIVING SYSTEM 审中-实审
公开(公告)号：EP4395155A1
公开(公告)日：2024-07-03
申请号：EP22885244.8
申请日：2022-07-29
申请人： CRM ICBG (WUXI) CO., LTD.
发明人： WANG, Sang , ZHAO, Xudong , ZHANG, Zhengrui
IPC分类号： H02P6/08
CPC分类号： H02P27/08 , H02H3/24 , H02P6/28 , H02P6/08 , H02H7/08 , H02H7/09
摘要： Provided in the present invention are a method for adaptively changing the duty ratio of PWM, and a circuit and an electric motor driving system. The method comprises: performing sampling and low-pass filtering on a direct-current bus voltage; determining whether the direct-current bus voltage is undervoltage, and if so, entering an undervoltage protection state, otherwise, executing the next step; calculating a new duty ratio and a new amplitude value corresponding to the new duty ratio; and determining whether the new duty ratio is greater than 100%, and if so, performing field-weakening control, otherwise, adjusting the duty ratio of a PWM signal on the basis of the new amplitude value. By means of the method for adaptively changing the duty ratio of PWM, the circuit and the electric motor driving system in the present invention, the duty ratio of a PWM signal is adaptively adjusted on the basis of an existing sine-wave generator and PWM generator while the current loop, speed loop or torque loop of the main body of the electric motor driving system is not changed, such that the influence of the fluctuation in a direct-current bus voltage on the electric motor performance can be overcome without needing to improve the CPU performance; and the operation is simple, and the cost is greatly reduced.

2. 发明公开

EP4366116A9 BATTERY PROTECTION CHIP, BATTERY SYSTEM, AND BATTERY PROTECTION METHOD 审中-实审
公开(公告)号：EP4366116A9
公开(公告)日：2024-06-26
申请号：EP22903247.9
申请日：2022-11-28
申请人： CRM ICBG (WUXI) CO., LTD.
发明人： QI, Zhengkun , LUO, Bingyin , YOU, Yong
IPC分类号： H02J7/00 , H02H7/18 , H02M1/088
CPC分类号： Y02E60/10 , H02J7/00 , H02H7/18
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.

3. 发明公开

EP4181386A1 METHOD FOR IMPLEMENTING BRUSHLESS DIRECT CURRENT MOTOR HALL POSITION SENSOR FAULT PROCESSING 审中-实审
公开(公告)号：EP4181386A1
公开(公告)日：2023-05-17
申请号：EP21912986.3
申请日：2021-07-02
申请人： CRM ICBG (WUXI) CO., LTD.
发明人： WANG, Sang , ZHAO, Xudong , ZHANG, Zhengrui
IPC分类号： H02P6/12 , H02P6/16
摘要： A method for implementing brushless direct current motor Hall position sensor fault processing, comprising: detecting a Hall signal by using an edge detection means, and recording the number of edge jumps; determining whether the absolute value of the difference between a position change of a rotor represented by a Hall and an angle value calculated inside of an MCU is within a preset error range, if so, then updating the angle value inside of the MCU as an angle represented by a rotor position as detected by the Hall, otherwise, incrementing the angle value inside of the MCU according to an angle increment calculated from the rotational speed of a motor; and obtaining an acceptable range according to a last raw angle increment value. A method for implementing brushless direct current motor Hall position sensor fault processing is employed, and an internal degree recording angle is designed. Compared with a means of using a timer alone, in which the size of the count is different when the speed is fast and slow and the position of a motor rotor cannot be intuitively understood, the motor is commutated according to a degree angle value, and the current position of the motor may thus be clearly understood.

4. 发明公开

EP4113841A1 CIRCUIT STRUCTURE FOR ACHIEVING MULTIPLEXING OF PIN OF CIRCUIT 审中-实审
公开(公告)号：EP4113841A1
公开(公告)日：2023-01-04
申请号：EP21893399.2
申请日：2021-07-02
申请人： CRM ICBG (WUXI) CO., LTD.
发明人： LIU, Weizhong , JIANG, Yaping
IPC分类号： H03K17/22
摘要： A circuit structure for achieving multiplexing of a pin of a circuit, comprising an MCU module, a temperature sensing circuit, and a functional module circuit. An output end of the temperature sensing circuit is connected to an enable signal port of the MCU module; the output voltage of the temperature sensing circuit is always higher than a threshold voltage of an enable signal; the MCU module is connected to the functional module circuit. Thus, the problem of multi-functional multiplexing of a single pin is solved, such that output and input signals of analog signal can share a pin.

5. 发明公开

EP4366116A1 BATTERY PROTECTION CHIP, BATTERY SYSTEM, AND BATTERY PROTECTION METHOD 审中-实审
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
申请人： CRM ICBG (WUXI) CO., LTD.
发明人： QI, Zhengkun , LUO, Bingyin , YOU, Yong
IPC分类号： H02J7/00 , H02H7/18 , H02M1/088
CPC分类号： Y02E60/10 , H02M1/088 , H02J7/00 , H02H7/18
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.

6. 发明公开

EP4142151A1 CLASS D POWER AMPLIFIER MODULATION SYSTEM FOR ADAPTIVE ADJUSTMENT OF AUDIO SIGNAL, AND METHOD, APPARATUS, PROCESSOR, AND STORAGE MEDIUM 审中-实审
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
申请人： CRM ICBG (WUXI) CO., LTD.
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.

7. 发明公开

EP4110022A1 SINGLE-CHIP BUS SLAVE CIRCUIT STRUCTURE 审中-实审
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
申请人： CRM ICBG (WUXI) CO., LTD.
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.

8. 发明公开

EP4110016A1 LED DIMMING CIRCUIT 有权
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
申请人： CRM ICBG (WUXI) CO., LTD.
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.

9. 发明公开

EP4231520A1 CIRCUIT STRUCTURE FOR COMPENSATING FOR HALL DEVIATION OF BRUSHLESS DIRECT CURRENT MOTOR, AND ANGLE CONTROLLER OPERATION METHOD 审中-实审
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
申请人： CRM ICBG (WUXI) CO., LTD.
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.

10. 发明公开

EP4203619A1 LED DRIVING SYSTEM AND CLOSED-LOOP CONTROL METHOD FOR LED DRIVING 有权
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
申请人： CRM ICBG (WUXI) CO., LTD.
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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