Control method and system for solving abnormality of position sensor

A control method and control system technology, which is applied in the field of control method and system for solving abnormal position sensors, can solve problems such as unstable vehicle control, low efficiency, and deviation of the position accuracy of the motor from the controller, and achieve the effect of avoiding waiting for rescue

Active Publication Date: 2022-03-25
HANGZHOU COBER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no matter what kind of position sensor it is, identification and decoding circuits are required, which has some disadvantages: when the sensor body is abnormal or the decoding circuit has problems, the vehicle will be unable to drive and can only wait for rescue; When driving, due to the existence of sensor hardware structure errors and decoding delays, there will be accuracy deviations in the controller's identification of the motor position, resulting in low efficiency and even unstable vehicle control

Method used

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  • Control method and system for solving abnormality of position sensor
  • Control method and system for solving abnormality of position sensor
  • Control method and system for solving abnormality of position sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figure 1 to Figure 3 As shown, a control method for solving the abnormality of the position sensor includes the following steps:

[0033] S1, monitor in real time whether the position angle signal collected by the position sensor is abnormal, if so, execute step S2, otherwise execute step S3;

[0034] S2. Switch to the non-position control mode, and control the motor with the non-position angle signal calculated in the non-position control mode;

[0035] Such as figure 2 As shown, when the position angle signal collected by the monitoring position sensor is abnormal, it is also necessary to issue a position abnormal alarm signal for prompting. At the same time, the non-position angle signal calculated in the non-position control mode needs to be filtered by software before being used.

[0036] Such as image 3 As shown, the non-position angle signal calculated in the non-position control mode is specifically:

[0037] S21. According to the deviation betwe...

Embodiment 2

[0052] Such as Figure 4 to Figure 7 As shown, the present invention also discloses a control system for solving the abnormality of the position sensor, which is applied to a control method for solving the abnormality of the position sensor in Embodiment 1, including a motor controller, a motor, an electric door lock, and a gear switch , electronic throttle, instrument and computer parameter setting ports, and this embodiment mainly limits the resolver decoding circuit in the motor controller.

[0053] In this embodiment, the resolver decoding circuit includes a resolver digital converter, two signal amplification circuits, and two push-pull circuits; the sine wave excitation negative signal and the sine wave excitation positive signal of the resolver digital converter are respectively connected with one circuit One input end of the signal amplifying circuit is electrically connected, the other input end of each signal amplifying circuit is connected to the bias voltage circui...

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Abstract

The invention relates to a control method and system for solving abnormity of a position sensor, and the method comprises the steps: monitoring whether a position angle signal collected by the position sensor is abnormal or not in real time, if yes, executing a step S2, and if not, executing a step S3; s2, switching to a position-free control mode, and performing motor control on a position-free angle signal calculated in the position-free control mode; and S3, motor control is conducted through position angle signals collected by the position sensor, on the basis of an existing position sensing control mode, a position-free control mode is introduced, a dual-mode working mode is achieved, when it is detected that the position sensor is abnormal, the position sensor can be rapidly switched to the position-sensor-free mode, the vehicle can continue to run normally, and the safety of the vehicle is improved. The situation of waiting for rescue is avoided, and vehicle control can be normally carried out even when the position sensor is abnormal.

Description

technical field [0001] The invention belongs to the technical field of vehicle control, and in particular relates to a control method and system for solving the abnormality of a position sensor. Background technique [0002] The position sensors of existing motor controllers generally include Hall sensors, magnetic (or photoelectric) encoders, resolvers, etc. Among them, resolvers are mainly used in vehicles, and their reliability and accuracy are relatively high. However, no matter what kind of position sensor it is, identification and decoding circuits are required, which has some disadvantages: when the sensor body is abnormal or the decoding circuit has problems, the vehicle will be unable to drive and can only wait for rescue; When driving, due to the existence of sensor hardware structure errors and decoding delays, the controller's identification of the motor position will have accuracy deviations, resulting in low efficiency and even unstable vehicle control. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/13H02P21/18H02P21/24H02P25/16H02P29/028
CPCH02P21/14H02P21/13H02P21/18H02P21/24H02P25/16H02P29/028
Inventor 武志强陈学帮周渊吴文淦朱巨华
Owner HANGZHOU COBER TECH
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