A detection device and method for an h-bridge drive circuit in an eps system
A technology of bridge drive circuit and detection method, applied in the field of H-bridge drive circuit detection device, can solve the problem that the H-bridge MOS open-circuit motor cannot be found in time, such as the instantaneous lock, and achieve good operation stability, light steering, and good tracking performance. Effect
Active Publication Date: 2018-11-27
湖南东嘉智能科技有限公司
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Problems solved by technology
[0006] The primary purpose of the present invention is to overcome the defects of the prior art that the open circuit of the H-bridge MOS and the instant lock of the motor cannot be found in time, and provide a detection device for the H-bridge drive circuit in the EPS system
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Embodiment 1
[0024] Such as Figure 1-4 As shown, a H-bridge drive circuit detection device in an EPS system includes a drive management module and an H-bridge drive circuit, the drive management module provides the operating voltage of the H-bridge drive circuit, and the drive management module also performs Real-time diagnosis and monitoring of overvoltage, low voltage, and overcurrent; the H-bridge drive circuit drives the motor to run, and the H-bridge drive circuit includes 4 triodes or FETs, and the forward direction of the motor is realized through the conduction of the diagonal triodes or FETs. Or for the purpose of reverse operation, the H-bridge driving circuit also includes a first current sensor S1 connected in series with the motor, and a second current sensor S2 connected in series between the working circuit of the H-bridge driving circuit and the ground terminal, the first current The sensor S1 and the second current sensor S2 are electrically connected to the drive managem...
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The present invention provides an H-bridge driving circuit detection device and method in an EPS system. The detection device can detect the phase current and the bus current of a motor through a first current sensor S1 and a second current sensor S2 to effectively avoid the same direction instant locking and non-planning assistance of the motor, realize the accident prevention and accident avoiding and improve the safety and the operability of the system. The H-bridge driving circuit detection device in the EPS system can collect the current value of a driving circuit in the motor operation state and the follow current state in real time to improve the measurement and control precision, allow the motor to provide stable and effective assistance in different work conditions and ensure the vehicles to perform light and flexible turning at the low speed, have enough road feel for turning at the high speed and have good tracking performance and operation stability. The present invention further provides an H-bridge driving circuit detection method in the EPS system based on the H-bridge driving circuit detection device. The H-bridge driving circuit detection device and method in the EPS system realize the detection of the H-bridge driving circuit.
Description
technical field [0001] The present invention relates to the field of electric power steering for automobiles, and more particularly relates to a detection device and method for an H-bridge driving circuit in an EPS system. Background technique [0002] With the development of the automobile industry, people have higher and higher requirements for automobile safety, and more and more automobile safety-related systems are applied in automobiles. The safety of automobiles includes two categories: active safety and passive safety. Active safety refers to the realization of accident prevention and accident avoidance to prevent accidents from happening. Because of its preventive measures before they happen, people pay more and more attention to them. [0003] The EPS market analysis shows that there is a strong demand for EPS systems with many additional functions, especially active safety functions. The motor and its control unit in the EPS system, as the execution unit of the...
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IPC IPC(8): G01R31/28G01R31/00
CPCG01R31/006G01R31/282G01R31/2829
Inventor 丁伟娜高明石广林
Owner 湖南东嘉智能科技有限公司