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Auxiliary Control System and Method Based on MCU Standing Slope and Half Slope Start

An auxiliary control system and auxiliary control technology, applied in the direction of control drive, control device, power management, etc., can solve the problems of uncertain command torque, large hardware loss, and increased hardware cost, so as to avoid over-temperature damage and improve accuracy High, real-time effects

Active Publication Date: 2020-03-13
SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At different slope angles, the electric vehicle needs to overcome the gravity component to achieve the effect of standing on the slope. The torque output by the MCU is naturally different. If the MCU is still working under the torque state, then the slope at different slope angles The command torque of the upper MCU cannot be determined
Of course, this situation can also be compensated by torque calibration for different slope angles, but electric vehicles also need to install a device for judging slope angles, which also increases hardware costs, and is also not considered
[0005] In actual driving, different drivers have different operating habits, and there are often differences in the sequence of releasing the handbrake and stepping on the accelerator, so it is easy to cause the car to slip, delay, and state impact when starting on a half-slope
[0006] After the pure electric vehicle enters the parking state, the drive motor maintains a state of zero speed, which is similar to the effect of motor stalling. It is well known that the motor will maintain a large current when it is in the stalling state for a long time. The gravity component also needs to maintain a larger current. The larger the slope angle, the greater the gravity component that needs to be overcome. Naturally, the current given amount that needs to be maintained is also larger, and the motor will heat up in a short time. Similarly, the IGBT or other components in the MCU Power devices will also generate heat, causing huge losses to hardware

Method used

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  • Auxiliary Control System and Method Based on MCU Standing Slope and Half Slope Start
  • Auxiliary Control System and Method Based on MCU Standing Slope and Half Slope Start

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Embodiment Construction

[0046] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0047] The MCU-based auxiliary control system for parking on a slope and starting on a half-slope is implemented based on the MCU, and divides the working states of the electric vehicle on the slope, and makes the electric vehicle work in a preset working state. The working state includes the pre-slope state and the exit-slope state, and the MCU gates the pre-slope state and the exit-slope state according to the current vehicle driving state information detected by it, and controls the electric motor The vehicle enters the pre-slope state or exits the state of the slope; the state of the pre-slope includes three sub-states, which are the state of the slope, the state of exiting the standing wave and the state of the pre-slope and the half-slope start state, wherein The electric vehicle has the same working state when exiting the parking slope...

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Abstract

The invention relates to an assisted control system and method based on MCU hill holding and hill starting. The method comprises the following steps of judging whether a vehicle enters a hill-holding mode or not in real time according to a control signal of the vehicle and a motor speed, wherein VCU vehicle operation mode judgment is not needed; after the vehicle enters the hill-holding mode, under the control of the MCU, switching a torque mode to a speed mode; under the speed mode, controlling the speed given to zero speed by the MCU to realize hill holding; in order to achieve zero speed constancy under the speed mode, adjusting output torque by a drive motor according to different gravity components corresponding to different slope angles; and identifying and controlling the entire hill-holding process completely and independently by the MCU, and high precision of torque control and strong real-time capability are achieved.

Description

technical field [0001] The present invention relates to the field of electric drive technology, in particular to the field of torque control of standing slope and half-slope starting of a pure electric vehicle based on a motor controller (MCU) and the locked-rotor protection of a permanent magnet synchronous motor for an electric vehicle. An auxiliary control system and method for MCU standing on a slope and starting on a half slope. Background technique [0002] The parking and half-slope auxiliary control applied to new energy vehicles is generally realized based on the programming of the vehicle controller (VCU). However, some common low-speed electric vehicles, old-age scooter electric vehicles, etc. The VCU is not integrated. It is precisely because of the particularity of the drivers of these electric vehicles that the auxiliary control of parking and half-slope start has become an inevitable state of safety guarantee. [0003] Considering that all pure electric vehic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20
CPCB60L15/2018B60L15/2081B60L2240/421B60L2240/486Y02T10/72
Inventor 高翔蔡良生林利赵艳浦蓉杰
Owner SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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