An electromagnetic slip clutch power-off protection and fault prompting system and method
A power-off protection and clutch technology, applied in electric steering mechanisms, instruments, measuring electricity, etc., can solve problems such as system failure, ESC unable to transmit torque, traffic hazards, etc., and achieve the effect of ensuring driving safety.
Active Publication Date: 2017-02-01
JIANGSU UNIV
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Problems solved by technology
[0002] At present, the electromagnetic slip clutch (ESC) mostly adopts the excitation form, and the excitation current comes from the three-phase circuit of the ESC. When the three-phase circuit fails, the excitation current in the excitation winding is too small or disappears, which directly causes the ESC to fail to transmit torque, resulting in When the system fails, the power assist disappears immediately, causing the driver's momentary discomfort when driving and excessive fatigue afterwards, resulting in unnecessary traffic hazards
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.
[0030] The specific idea of the present invention is: under normal driving conditions, when necessary, through the passage of the safety circuit, it is ensured that the electromagnetic slip clutch (ESC) fails in the external circuit, resulting in insufficient power supply, causing the current of the excitation coil to be too low, so that the ESC The magnetic field is relatively weak, so that it cannot drive the driven part of the ESC to rotate, so as to ensure the normal operation of the system and avoid driving safety hazards caused by the sudden disappearance of the power steering; and display the fault location through the prompt device installed in the cab, Simplify troubleshooting procedures and reduce maintenance time.
[0031] As the power component of the E-ECHP...
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The invention discloses a power-off protection and fault prompt system and a method of an electromagnetic slip clutch. The system comprises an indicator, an ECU, a vehicle-mounted accumulator, two diodes, three current sensors, two electronic switches and an accumulator. The output ends of the three current sensors are connected with input ends of an ECU corresponding processing external power supply circuit, an emergency circuit and a safety circuit current signal; and the input end of the indicator is connected with an output end of an ECU corresponding fault signal. The external power supply circuit is formed by serially connecting the vehicle-mounted accumulator, the diodes and the current sensors. The safety circuit is formed by serially connecting the electronic switches, the diodes, the current sensors and the accumulator. The emergency circuit is formed by serially connecting the current sensors and the electronic switches. The system uses the ECU and the electronic switches for opening and closing the safety circuit and the emergency circuit, and uses the ECU, the current sensors and the indicator for primarily judging the circuit problem after the failure of the ECU. The system provides a low-cost fault warning mode to an ESC, and keeps stable operation in a certain time to guarantee the driving safety.
Description
technical field [0001] The invention relates to the field of vehicle chassis steering systems and electromagnetic circuits, in particular to a technology for power-off protection and fault alarm of power components of a novel electromagnetic hydraulic power steering system. Background technique [0002] At present, the electromagnetic slip clutch (ESC) mostly adopts the excitation form, and the excitation current comes from the three-phase circuit of the ESC. When the three-phase circuit fails, the excitation current in the excitation winding is too small or disappears, which directly causes the ESC to fail to transmit torque, resulting in When the system fails, the power assist disappears immediately, causing the driver's momentary discomfort when driving and excessive fatigue afterwards, resulting in unnecessary traffic hazards. The invention focuses on solving the problem that the magnetic field generated by the excitation circuit current of the excitation type electromag...
Claims
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IPC IPC(8): B62D5/04G01R31/02
CPCB62D5/0481G01R31/50
Inventor 江浩斌邵凯唐斌肖飞
Owner JIANGSU UNIV